Medical tube and connector for breathing circuit

Abstract

A medical tube assembly is disclosed that includes a connector, a collar, and a tube that may be made of a water absorbent material. The tube includes a body portion and an increasing gas passage cross-sectional area portion. The collar is configured to engage an outer surface of the tube when the connector is connected to the tube, and the tube is held between the collar and the tube connection portion.

Description

Technical Field

[0001] The present invention relates to medical tubing and connectors, and in particular to medical tubing assemblies, medical tubing and connectors for use in breathing circuits suitable for delivering humidified gases to or from a patient, such as in a respiratory humidification system. Background Art

[0002] In a breathing circuit, a variety of different components deliver warmed and / or humidified gases to and / or from the patient. Respiratory humidification helps reduce the likelihood of infection and / or tissue damage.

[0003] Humidifiers are used to humidify gases. Medical tubing is used to transfer humidified gases to and from a patient and to connect any devices together as part of a breathing circuit.

[0004] The breathing circuit can provide a complete circuit of breathing gases to and from the patient. In some cases, no tube is provided to exhaust gases from the patient, and the gases can be exhaled directly into the atmosphere. In other cases, a complete breathing circuit including an inspiratory limb and an expiratory limb is provided to deliver gases to the patient and exhaust gases.

[0005] The breathing circuit may be used with a gas source such as a ventilator.

[0006] It is an object of the present invention to provide a medical tube assembly and / or medical tube and / or medical connector, or at least to provide the public with a useful choice. Summary of the invention

[0007] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0008] a tube defining a gas passage extending from a first end of the tube to a second end of the tube, and wherein the tube comprises a water absorbing material, and

[0009] a connector defining a gas passage extending therethrough, the connector being configured to be connected to the first end of the tube,

[0010] The tube includes a main body portion and a gradually increasing gas passage cross-sectional area portion, wherein the gradually increasing gas passage cross-sectional area portion is at or near the first end of the tube and extends from the main body portion.

[0011] In some configurations, the connector includes a tube connecting portion that is disposed within an interior of the tube when the connector is connected to the tube.

[0012] In some configurations, the medical tube assembly includes a collar, wherein the collar is configured to engage an outer surface of the tube when the connector is connected to the tube.

[0013] In some configurations, the tube is retained between the collar and the tube connecting portion.

[0014] In some configurations, a cuff region of the tube is retained between the collar and the tube connecting portion.

[0015] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0016] a tube defining a gas passage extending from a first end of the tube to a second end of the tube,

[0017] a connector defining a gas passage extending therethrough, the connector being configured to be connected to the first end of the tube,

[0018] wherein the connector comprises a tube connection portion configured to be disposed inside the tube when the connector is connected to the tube, and

[0019] a collar, wherein the collar is configured to engage an outer surface of the tube when the connector is connected to the tube, and

[0020] wherein the tube is held between the collar and the tube connection portion, and

[0021] The tube includes a main body portion and a gradually increasing gas passage cross-sectional area portion, wherein the gradually increasing gas passage cross-sectional area portion is located at or near the first end of the tube and extends from the main body portion.

[0022] In some configurations, the tube includes a water absorbing material.

[0023] In some configurations, the tube is at least partially a bellows.

[0024] In some configurations, the main body portion of the tube is corrugated.

[0025] In some configurations, the corrugations include alternating peaks and valleys.

[0026] In some configurations, the gas passage cross-sectional area of ​​the main body portion of the tube is defined by:

[0027] a) the minimum cross-sectional area of ​​the gas passage in the main body of the tube, or

[0028] b) the maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or

[0029] c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

[0030] In some configurations, the gas passage cross-sectional area of ​​the main body portion of the tube is defined by:

[0031] a) the local minimum cross-sectional area of ​​the gas passage in the main body of the tube, or

[0032] b) the local maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or

[0033] c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

[0034] In some configurations, one or more of the following: the local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, the local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, and / or the local nominal cross-sectional area of ​​the gas passage of the main portion of the tube, is constant along the length of the main portion of the tube.

[0035] In some configurations, the gas passage diameter of the main body portion of the tube is defined by:

[0036] a) the minimum diameter of the gas passageway in the main body of the tube, or

[0037] b) the maximum diameter of the gas passageway in the main body of the tube, or

[0038] c) when the tube is corrugated, a nominal cross-sectional diameter which is the average of the smallest diameter of the gas passages of the main body of the tube and the largest diameter of the gas passages of the main body of the tube.

[0039] In some configurations, the gas passage diameter of the main body portion of the tube is defined by:

[0040] a) the local minimum internal diameter of the gas passageway in the main body of the tube, or

[0041] b) the local maximum internal diameter of the gas passageway of the main body of the tube, or

[0042] c) When the tube is corrugated, a local nominal diameter of the gas passage diameter, the local nominal diameter being the average of the diameter between opposing troughs of the tube and the diameter between opposing peaks of the tube adjacent to the troughs.

[0043] In some configurations, one or more of the following: a local minimum inner diameter of the gas passageway of the main portion of the tube, a local maximum inner diameter of the gas passageway of the main portion of the tube, and / or a local nominal diameter of the gas passageway of the main portion of the tube, is constant along the length of the main portion of the tube.

[0044] In some configurations, the medical tube assembly includes at least one heating wire.

[0045] In some configurations, the at least one heating wire is located in the wall of the tube, around the tube, or within the gas channel of the tube and / or the gas channel of the connector.

[0046] In some configurations, the medical tube assembly includes an electrical connector configured to allow electrical connection to the at least one heater wire.

[0047] In some configurations, the connector forms an elbow.

[0048] In some configurations, the connector is a straight connector.

[0049] In some configurations, the increasing gas passage cross-sectional area portion includes an increase in gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

[0050] In some configurations, the increase in gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube is linear along the length of the increasing gas passage cross-sectional area portion.

[0051] In some configurations, the increasing gas passage cross-sectional area portion includes a step-wise increase in gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

[0052] In some configurations, the increasing gas passage cross-sectional area portion of the tube includes a cross-sectional area of ​​the gas passage of the tube that increases in a direction from the main body of the tube toward the first end of the tube.

[0053] In some configurations, the gas passage of the tube in the increasing gas passage cross-sectional area portion is defined at least by a diameter of the gas passage of the tube in the increasing gas passage cross-sectional area portion.

[0054] In some configurations, the increasing gas passage cross-sectional area portion has an increasing diameter.

[0055] In some configurations, the increasing gas passage cross-sectional area portion includes an increase in gas passage diameter in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

[0056] In some configurations, the increase in diameter of the gas passageway in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube is linear along the length of the increasing gas passageway cross-sectional area portion.

[0057] In some configurations, the increasing gas passage cross-sectional area portion includes a step-wise increase in gas passage diameter in a direction toward the first end of the tube and / or toward a cuff region of the first end of the tube.

[0058] In some configurations, the increasing gas passage cross-sectional area portion extends from a first location distal to the first end of the tube to a location at or near the first end of the tube.

[0059] In some configurations, the increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the first end.

[0060] In some configurations, the increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the cuff region of the first end.

[0061] In some configurations, the increasing gas passage cross-sectional area portion of the tube is corrugated.

[0062] In some configurations, the cross-sectional area of ​​the increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, which is the average of an area of ​​the gas channel of the increasing gas channel cross-sectional area portion defined by a trough of the increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the increasing gas channel cross-sectional area portion defined by a peak of the increasing gas channel cross-sectional area portion adjacent to the trough.

[0063] In some configurations, the cross-sectional area of ​​the increasing gas passage cross-sectional area portion of the tube is defined by:

[0064] a) the local minimum cross-sectional area of ​​the gas passage of the portion with increasing gas passage cross-sectional area, or

[0065] b) The local maximum cross-sectional area of ​​the gas channel of the portion with increasing cross-sectional area of ​​the gas channel.

[0066] In some configurations, the increasing gas passage cross-sectional area is defined in part by a plurality of corrugations.

[0067] In some configurations, the number of corrugations is from about 1 to about 10 corrugations, or from about 2 to about 7 corrugations, or from about 2 to about 5 corrugations, or from about 2 to about 2.5 corrugations, or about 2 corrugations.

[0068] In some configurations, when the tube is connected to the connector, the end of the increasing gas passage cross-sectional area portion is located at the end of the tube connection portion.

[0069] In some configurations, the increasing gas passage cross-sectional area portion is a trumpet-shaped portion.

[0070] In some configurations, the tube includes a cuff region located at or near the first end of the tube.

[0071] In some configurations, the cuff region extends from the increasing gas passage cross-sectional area portion.

[0072] In some configurations, the cuff region extends toward the first end of the tube.

[0073] In some configurations, the cuff region of the first end of the tube is configured to engage the tube connecting portion of the connector.

[0074] In some configurations, the cuff region includes at least one rib.

[0075] In some configurations, the cuff region includes at least one rib oriented parallel or at least partially parallel to the longitudinal axis of the tube.

[0076] In some configurations, the cuff region includes at least one rib extending longitudinally along the tube.

[0077] In some configurations, the at least one rib is configured to engage with a retention feature of a collar of the medical tube assembly and / or a retention feature of a tube connecting portion of the connector.

[0078] In some configurations, the cuff region has an interior cross-sectional area that is larger than the gas passage cross-sectional area of ​​the main body portion of the tube.

[0079] In some configurations, the cuff region has an inner diameter that is larger than the diameter of the gas passageway of the main body portion of the tube.

[0080] In some configurations, the cuff region is non-corrugated.

[0081] In some configurations, the wall of the tube is at least partially formed from a gas permeable material.

[0082] In some configurations, the wall of the tube is formed entirely of a gas permeable material.

[0083] In some configurations, the water-absorbent material of the tube is a breathable material.

[0084] In some configurations, the collar is configured to engage an outer surface of the connector when the connector is connected to the tube.

[0085] In some configurations, the inner surface of the collar includes a retention feature configured to engage an outer surface of the tube to assist in retaining the tube on the connector.

[0086] In some configurations, the connector and / or the collar includes at least one attachment feature configured to retain the collar to the connector.

[0087] In some configurations, the at least one attachment feature includes at least one attachment tab.

[0088] In some configurations, the at least one attachment feature includes an attachment protrusion configured to engage a complementary recess.

[0089] In some configurations, the attachment protrusion is located on one of the connector or the collar and the recess is located on the other of the connector or the collar.

[0090] In some configurations, the collar is configured to engage an outer surface of the cuff region when the connector is connected to the tube.

[0091] In some configurations, a cuff region of the tube is retained between the collar and the tube connecting portion.

[0092] In some configurations, the tube connecting portion of the connector includes a retention feature configured to engage an inner surface of the tube to assist in retaining the tube to the connector.

[0093] In some configurations, the tube connecting portion of the connector includes a retention feature configured to engage an inner surface of the cuff region to assist in retaining the tube to the connector.

[0094] In some configurations, the retention feature includes at least one retention tab.

[0095] In some configurations, the at least one retaining projection is configured to extend at least partially circumferentially around the tube connecting portion.

[0096] In some configurations, the at least one retaining protrusion is configured to extend around an outer surface of the tube connecting portion.

[0097] In some configurations, the retention feature includes a helical retention protrusion.

[0098] In some configurations, the tube connecting portion of the connector and the retaining features of the tube connecting portion of the connector form barbs.

[0099] In some configurations, the tube connection portion and / or the collar includes a sealing feature configured to provide a pneumatic seal between the collar and the tube connection portion.

[0100] In some configurations, the sealing feature includes at least one sealing protrusion.

[0101] In some configurations, the at least one sealing protrusion is configured to extend at least partially circumferentially around the tube connecting portion.

[0102] In some configurations, the at least one sealing protrusion is configured to extend around an outer surface of the tube connecting portion.

[0103] In some configurations, the sealing feature is located between the retaining feature and the attachment feature.

[0104] In some configurations, the medical tube assembly includes a second connector that can be connected to the second end of the tube.

[0105] In some configurations, the second connector includes any of the features of the connector as defined in any of the preceding claims.

[0106] In some configurations, the tube includes a second increasing gas passage cross-sectional area portion located at or near the second end of the tube and extending from the body portion.

[0107] In some configurations, the second increasing gas passage cross-sectional area portion includes an increase in gas passage cross-sectional area in a direction toward the second end of the tube and / or toward the cuff region of the second end of the tube.

[0108] In some configurations, the increase in gas passage cross-sectional area in a direction toward the second end of the tube and / or toward the cuff region of the second end of the tube is linear along the length of the second increasing gas passage cross-sectional area portion.

[0109] In some configurations, the second increasing gas passage cross-sectional area portion includes a step-wise increase in gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

[0110] In some configurations, the second increasing gas passage cross-sectional area portion of the tube includes a cross-sectional area of ​​the gas passage of the tube that increases in a direction from the main body of the tube toward the second end of the tube.

[0111] In some configurations, the second increasing gas passage cross-sectional area is defined at least by a diameter of the gas passage in the second increasing gas passage cross-sectional area of ​​the tube.

[0112] In some configurations, the increasing gas passage cross-sectional area portion has an increasing diameter.

[0113] In some configurations, the increasing gas passage cross-sectional area portion includes an increase in gas passage diameter in a direction toward the second end of the tube and / or toward a cuff region of the second end of the tube.

[0114] In some configurations, the increase in gas passage diameter in a direction toward the second end of the tube and / or toward the cuff region of the second end of the tube is linear along the length of the second increasing gas passage cross-sectional area portion.

[0115] In some configurations, the second increasing gas passage cross-sectional area portion includes a step-wise increase in gas passage diameter in a direction toward the second end of the tube and / or toward a cuff region of the second end of the tube.

[0116] In some configurations, the second increasing gas passage cross-sectional area portion extends from a second location distal to the second end of the tube to a location at or near the second end of the tube.

[0117] In some configurations, the second increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the second end.

[0118] In some configurations, the second increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the cuff region of the second end.

[0119] In some configurations, the second increasing gas passage cross-sectional area portion of the tube is corrugated.

[0120] In some configurations, the cross-sectional area of ​​the second gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, which is the average of an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a trough of the second gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a peak of the second gradually increasing gas channel cross-sectional area portion adjacent to the trough.

[0121] In some configurations, the increasing gas passage cross-sectional area of ​​the tube is defined in part by:

[0122] a) the local minimum cross-sectional area of ​​the gas passage of the portion with increasing gas passage cross-sectional area, or

[0123] b) The local maximum cross-sectional area of ​​the gas channel of the portion with increasing cross-sectional area of ​​the gas channel.

[0124] In some configurations, the second increasing gas passage cross-sectional area is defined in part by a plurality of corrugations.

[0125] In some configurations, the number of corrugations is from about 1 to about 10 corrugations, or from about 2 to about 7 corrugations, or from about 2 to about 5 corrugations, or from about 2 to about 2.5 corrugations, or about 2 corrugations.

[0126] In some configurations, when the tube is connected to the second connector, an end of the second increasing gas passage cross-sectional area portion is located at or near a tube connection portion of the second connector.

[0127] In some configurations, the second increasing gas passage cross-sectional area portion is a trumpet-shaped portion.

[0128] In some configurations, the tube includes a second cuff region at or near the second end of the tube.

[0129] In some configurations, the cuff region extends from the second increasing gas passage cross-sectional area portion.

[0130] In some configurations, the cuff region extends toward the second end of the tube.

[0131] In some configurations, the cuff region of the second end of the tube is configured to engage the tube connecting portion of the connector.

[0132] In some configurations, the cuff region of the second end of the tube includes at least one rib.

[0133] In some configurations, the cuff region of the second end of the tube includes at least one rib oriented parallel or at least partially parallel to the longitudinal axis of the tube.

[0134] In some configurations, the cuff region includes at least one rib extending longitudinally along the tube.

[0135] In some configurations, the at least one rib is configured to engage with a retention feature of the collar and / or a retention feature of a tube connecting portion of the connector.

[0136] In some configurations, the cuff region of the second end of the tube has an internal cross-sectional area that is larger than the gas passage cross-sectional area of ​​the main body portion of the tube.

[0137] In some configurations, the cuff region has an inner diameter that is larger than the diameter of the gas passageway of the main body portion of the tube.

[0138] In some configurations, the cuff region is non-corrugated.

[0139] In one aspect of the present disclosure, an exhalation passage as an exhalation tube, a filter and a Y-piece is provided, wherein the exhalation tube is a medical tube assembly as claimed in any one of the above claims.

[0140] In some configurations, the pressure drop across the expiratory pathway is less than 1.8 cmH2O for a gas flow of 30 L / min, or less than 1.8 cmH2O for a gas flow of 15 L / min, or less than 1.85 cmH2O for a gas flow of 2.5 L / min.

[0141] In one aspect of the present disclosure, a breathing circuit is provided, comprising: a medical tube assembly of any one of the above aspects, the medical tube assembly serving as an expiratory tube; a drying line configured to extend from a gas source; a humidification chamber or a humidifier configured to be connected to the drying line; and an inspiratory tube configured to be connected to the humidifier chamber or the humidifier to a Y-piece.

[0142] In some configurations, the pneumatic compliance of the breathing circuit is less than 5 ml / cmH2O at 60 cmH2O.

[0143] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0144] A tube defining a gas passage extending from a first end of the tube to a second end of the tube, and wherein the tube comprises:

[0145] a main body portion defining a main body portion gas passage,

[0146] a first increasing gas passage cross-sectional area portion located at or near the first end of the tube and extending from the main body portion, the gas passage cross-sectional area of ​​the first increasing gas passage cross-sectional area portion increasing in a direction toward the first end of the tube to a cross-sectional area of ​​the gas passage at an end of the first increasing gas passage cross-sectional area portion; and

[0147] a second gradually increasing gas passage cross-sectional area portion, the second gradually increasing gas passage cross-sectional area portion being located at or near the second end of the tube and extending from the main body portion, the gas passage cross-sectional area of ​​the second gradually increasing gas passage cross-sectional area portion increasing in a direction toward the second end of the tube to a cross-sectional area of ​​the gas passage at an end of the second gradually increasing gas passage cross-sectional area portion,

[0148] A first connector configured to be connected to the first end of the tube, the first connector defining a gas passage extending through the first connector, the first connector comprising:

[0149] a tube connecting portion configured to engage with the first end of the tube, the tube connecting portion defining a gas passage, defining a second portion of the gas passage,

[0150] And among them,

[0151] a) the cross-sectional area of ​​the gas passage at the end of the first gradually increasing gas passage cross-sectional area portion is larger than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the first connector,

[0152] b) the minimum cross-sectional area of ​​the gas passage of the second portion of the first connector is greater than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the first connector, and

[0153] A second connector configured to be connected to the second end of the tube, the second connector defining a gas passage extending through the second connector, the second connector comprising:

[0154] a tube connecting portion configured to engage with the second end of the tube, the tube connecting portion defining a gas passage, defining a second portion of the gas passage,

[0155] And among them,

[0156] a) the cross-sectional area of ​​the gas passage at the end of the second gradually increasing gas passage cross-sectional area portion is larger than the minimum cross-sectional area of ​​the gas portion of the tube connecting portion of the second connector,

[0157] b) The minimum cross-sectional area of ​​the gas passage of the second portion of the second connector is larger than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the second connector.

[0158] In some configurations, the second portion of the first connector is an associated connector portion configured to engage with the first associated connector.

[0159] In some configurations, the second portion of the first connector is an intermediate portion between the tube connection portion of the first connector and an associated connector portion configured to engage with a first associated connector.

[0160] In some configurations, the first associated connector includes a tapered portion configured to engage with the associated connector portion of the first connector.

[0161] In some configurations, the second portion of the second connector is an associated connector portion configured to engage with a second associated connector.

[0162] In some configurations, the second portion of the second connector is an intermediate portion between a tube connection portion of the second connector and an associated connector portion configured to engage with a second associated connector.

[0163] In some configurations, the second associated connector includes a tapered portion configured to engage the associated connector portion of the second connector.

[0164] In some configurations, the cross-sectional area of ​​the gas passage of the opening of the second associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

[0165] In some configurations, the tube includes a cuff region located at or near the first end of the tube and / or a cuff region located at or near the second end of the tube.

[0166] In some configurations, the cuff region of the first end of the tube is held between a first collar and the tube connecting portion of the first connector, and / or wherein the cuff region of the second end of the tube is held between a second collar of the second portion and the tube connecting portion.

[0167] In some configurations, the tube includes a water absorbing material.

[0168] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0169] A tube, the tube comprising:

[0170] The main part,

[0171] a first increasing gas passage cross-sectional area portion located at or near the first end of the tube and extending from the body portion, and

[0172] a second increasing gas passage cross-sectional area portion located at or near the second end of the tube and extending from the main body portion,

[0173] a first connector having a tube connecting portion for connecting to the tube at a first end of the tube and a second portion,

[0174] a second connector having a tube connecting portion for connecting to the tube at a second end of the tube and a second portion,

[0175] wherein at least the tube connection portion of the first connector, the second portion of the first connector, the tube, the tube connection portion of the second connector, and the second portion of the second connector define a gas passage of the assembly,

[0176] Wherein, in a direction toward the first end of the tube:

[0177] a) the gas channel cross-sectional area of ​​the gas channel increases from the end of the main body portion closest to the first gradually increasing gas channel cross-sectional area portion through the first gradually increasing gas channel cross-sectional area portion,

[0178] b) the gas channel cross-sectional area of ​​the gas channel decreases from the first increasing gas channel cross-sectional area portion to the tube connection portion of the first connector, and

[0179] c) the gas channel cross-sectional area of ​​the gas channel increases from the tube connecting portion of the first connector to the second portion of the first connector, and

[0180] Wherein, in a direction toward the second end of the tube:

[0181] a) the gas channel cross-sectional area of ​​the gas channel increases from the end of the main body portion closest to the second gradually increasing gas channel cross-sectional area portion through the second gradually increasing gas channel cross-sectional area portion,

[0182] b) the gas channel cross-sectional area of ​​the gas channel decreases from the second increasing gas channel cross-sectional area portion to the tube connecting portion of the second connector, and

[0183] c) A gas channel cross-sectional area of ​​the gas channel increases from the tube connecting portion of the second connector to the second portion of the second connector.

[0184] In some configurations, the second portion of the first connector is an associated connector portion configured to engage with the first associated connector.

[0185] In some configurations, the second portion of the first connector is an intermediate portion between the tube connection portion of the first connector and an associated connector portion configured to engage with a first associated connector.

[0186] In some configurations, the first associated connector includes a tapered portion configured to engage with the associated connector portion of the first connector.

[0187] In some configurations, the cross-sectional area of ​​the gas passage of the opening of the first associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

[0188] In some configurations, the second portion of the second connector is an associated connector portion configured to engage with a second associated connector.

[0189] In some configurations, the second portion of the second connector is an intermediate portion between a tube connection portion of the second connector and an associated connector portion configured to engage with a second associated connector.

[0190] In some configurations, the second associated connector includes a tapered portion configured to engage the associated connector portion of the second connector.

[0191] In some configurations, the cross-sectional area of ​​the gas passage of the opening of the second associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

[0192] In some configurations, the tube includes a cuff region located at or near the first end of the tube and / or a cuff region located at or near the second end of the tube.

[0193] In some configurations, the cuff region of the first end of the tube is held between a first collar and the tube connecting portion of the first connector, and / or wherein the cuff region of the second end of the tube is held between a second collar of the second portion and the tube connecting portion.

[0194] In some configurations, the tube includes a water absorbing material.

[0195] In some configurations, the first increasing gas passage cross-sectional area portion and / or the second increasing gas passage cross-sectional area portion of the tube is corrugated.

[0196] In some configurations, the cross-sectional area of ​​the first gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, which is the average of an area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion defined by a trough of the first gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion defined by a peak of the first gradually increasing gas channel cross-sectional area portion adjacent to the trough.

[0197] In some configurations, the cross-sectional area of ​​the second gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, which is the average of an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a trough of the second gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a peak of the second gradually increasing gas channel cross-sectional area portion adjacent to the trough.

[0198] In some configurations, the first increasing gas passage cross-sectional area portion of the tube is defined by:

[0199] a) the local minimum cross-sectional area of ​​the gas passage of the portion with increasing gas passage cross-sectional area, or

[0200] b) The local maximum cross-sectional area of ​​the gas channel of the portion with increasing cross-sectional area of ​​the gas channel.

[0201] In some configurations, the second increasing gas passage cross-sectional area of ​​the tube is defined in part by:

[0202] a) the local minimum cross-sectional area of ​​the gas passage of the portion with increasing gas passage cross-sectional area, or

[0203] b) The local maximum cross-sectional area of ​​the gas passage along the length of the increasing gas passage cross-sectional area portion.

[0204] In some configurations, the cross-sectional diameter of the main body portion of the tube is smaller than the cross-sectional diameter of the first increasing gas passage cross-sectional area portion and / or the cross-sectional diameter of the first increasing gas passage cross-sectional area portion.

[0205] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0206] a tube defining a gas passage extending from a first end of the tube to a second end of the tube,

[0207] a connector configured to connect to the first end of the tube, the connector defining a gas passage extending through the connector, and

[0208] wherein the connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to deliver gas to a gas channel of the connector and / or receive gas from a gas channel of the connector when the associated connector is connected to the connector, and

[0209] in,

[0210] a) the cross-sectional area of ​​the gas passageway in the main body of the tube, and

[0211] b) the minimum cross-sectional area of ​​the gas passage of the connector,

[0212] are equal to or larger than the cross-sectional area of ​​the gas passage of the opening of the associated connector, and

[0213] The tube includes a portion of increasing gas passage cross-sectional area located near a first end of the tube.

[0214] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0215] a tube defining a gas passage extending from a first end of the tube to a second end of the tube,

[0216] a first connector configured to be connected to the first end of the tube, the first connector defining a gas passage extending through the first connector,

[0217] a second connector configured to connect to the second end of the tube, the second connector defining a gas passage extending through the second connector, and

[0218] wherein the first connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to receive gas from a gas passage of the connector or to deliver gas to a gas passage of the connector when the associated connector is connected to the connector, and

[0219] in:

[0220] a) the cross-sectional area of ​​the gas passage in the main part of the tube,

[0221] b) the minimum cross-sectional area of ​​the gas passage of the first connector, and

[0222] c) the minimum cross-sectional area of ​​the gas passage of the second connector,

[0223] are equal to or larger than the cross-sectional area of ​​the opening of the associated connector.

[0224] In some configurations, the second connector is configured to connect to a second associated connector, the second associated connector comprising an opening configured to receive gas from or deliver gas to a gas channel of the connector when the second associated connector is connected to the second connector, and wherein:

[0225] a) the cross-sectional area of ​​the gas passage in the main part of the tube,

[0226] b) the minimum cross-sectional area of ​​the gas passage of the first connector, and

[0227] c) the minimum cross-sectional area of ​​the gas passage of the second connector,

[0228] are equal to or greater than the cross-sectional area of ​​the opening of the second associated connector

[0229] In some configurations, the gas passage cross-sectional area of ​​the main body portion of the tube is defined by:

[0230] a) the minimum cross-sectional area of ​​the gas passage in the main body of the tube, or

[0231] b) the maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or

[0232] c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

[0233] In some configurations, the gas passage cross-sectional area of ​​the main body portion of the tube is defined by:

[0234] a) the local minimum cross-sectional area of ​​the gas passage in the main body of the tube, or

[0235] b) the local maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or

[0236] c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

[0237] In some configurations, one or more of the following: the local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, the local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, and / or the local nominal cross-sectional area of ​​the gas passage of the main portion of the tube, is constant along the length of the main portion of the tube.

[0238] In some configurations, the gas passage diameter of the main body portion of the tube is defined by:

[0239] a) the minimum diameter of the gas passageway in the main body of the tube, or

[0240] b) the maximum diameter of the gas passageway in the main body of the tube, or

[0241] c) when the tube is corrugated, a nominal cross-sectional diameter which is the average of the smallest diameter of the gas passages of the main body of the tube and the largest diameter of the gas passages of the main body of the tube.

[0242] In some configurations, the gas passage diameter of the main body portion of the tube is defined by:

[0243] a) the local minimum internal diameter of the gas passageway in the main body of the tube, or

[0244] b) the local maximum internal diameter of the gas passageway of the main body of the tube, or

[0245] c) When the tube is corrugated, a local nominal diameter of the gas passage diameter, the local nominal diameter being the average of the diameter between opposing troughs of the tube and the diameter between opposing peaks of the tube adjacent to the troughs.

[0246] In some configurations, one or more of the following: a local minimum inner diameter of the gas passageway of the main portion of the tube, a local maximum inner diameter of the gas passageway of the main portion of the tube, and / or a local nominal diameter of the gas passageway of the main portion of the tube, is constant along the length of the main portion of the tube.

[0247] In one aspect of the present disclosure, there is provided a medical tube assembly comprising:

[0248] a tube defining a gas passage extending from a first end of the tube to a second end of the tube,

[0249] a connector configured to connect to the first end of the tube, the connector defining a gas passage extending through the connector, and

[0250] wherein the connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to receive gas from a gas passage of the connector or to deliver gas to a gas passage of the connector when the associated connector is connected to the connector,

[0251] a first tube diameter, the first tube diameter being defined by a main body portion of the tube,

[0252] a second tube diameter defined by the tube at the first end of the tube,

[0253] the tube end connector diameter, which is defined by the smallest diameter of the gas passageway of the tube connecting portion of the connector,

[0254] wherein the second tube diameter is greater than the first tube diameter and the tube end connector diameter, and

[0255] Wherein, the first tube diameter, the second tube diameter and the tube end connector diameter are all larger than the diameter of the opening of the associated connector.

[0256] In one aspect of the present disclosure, there is provided a breathing kit comprising an inspiratory tube, an expiratory tube as defined in any of the above aspects, and a humidification chamber.

[0257] In one aspect of the present disclosure, there is provided a breathing kit comprising an inspiratory tube, an expiratory tube as defined in any of the above aspects, a humidification chamber, and a Y-piece.

[0258] In one aspect of the present disclosure, there is provided a breathing kit comprising an inspiratory tube, an expiratory tube as defined in any of the above aspects, a humidification chamber, a Y-piece, and a drying line.

[0259] In one aspect of the present disclosure, there is provided a breathing kit comprising an inspiratory tube, an expiratory tube as defined in any of the above aspects, a humidification chamber, a Y-piece, a drying line, and a filter.

[0260] It will be appreciated that any of the above aspects may be combined with any combination of the above aspects.

[0261] The term "axis" as used in this specification refers to a rotation axis around which a line or plane can rotate to form a symmetrical shape. For example, a line rotating around the rotation axis will form a surface, while a plane rotating around the rotation axis will form a solid figure.

[0262] As used herein, the term "and / or" means "and" or "or" or both.

[0263] As used herein, "one or more" preceding a noun refers to the plural and / or singular form of the noun.

[0264] For the purposes of this specification, when method steps are described in a sequence, that sequence does not necessarily imply that the steps are arranged in that sequence chronologically unless there is no other logical way to explain the sequence.

[0265] The term "comprising" as used in this specification and claims means "consisting at least in part of". When interpreting each statement in this specification containing the term "comprising", there may also be features other than the one or those features following the term. The related terms "comprising" and "including" are to be interpreted in the same manner.

[0266] The present aspect may also be broadly described as including the parts, elements and features referred to or indicated individually or collectively in the specification of the present application, and any or all combinations of any two or more of said parts, elements or features, and, where specific integers having known equivalents in the art to which the present aspect relates are mentioned herein, such known equivalents are deemed to be incorporated herein as if individually set forth.

[0267] For those skilled in the art to which the present invention relates, many changes in construction and widely different embodiments and applications of the present invention will be readily apparent without departing from the scope of the invention as defined in the appended claims. The disclosure and description herein are purely illustrative and are not intended to be limiting in any sense.

[0268] Other aspects of the present invention will become apparent from the following description, which is given by way of example only and with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0269] Embodiments of the invention will now be described, by way of example only, and with reference to the accompanying drawings, in which:

[0270] Figure 1 A schematic diagram of a respiratory assistance device configured to provide respiratory therapy to a patient is shown.

[0271] Figure 2 and Figure 3 A schematic diagram of another embodiment of a respiratory assistance device configured to provide respiratory therapy to a patient is shown.

[0272] Figure 4 A perspective view of an embodiment of a medical tube assembly is shown.

[0273] Figure 5 A side view of an embodiment of a medical tube assembly is shown.

[0274] Figure 6 An exploded side view of an embodiment of a medical tube assembly is shown.

[0275] Figure 7 A cross-sectional side view of an embodiment of a medical tube assembly is shown.

[0276] Figure 8 A cross-sectional side view of an embodiment of a medical tube assembly is shown.

[0277] Fig. 9 An exploded cross-sectional side view of a first connector (eg, a device end connector) and tubing of an embodiment of a medical tube assembly is shown.

[0278] Fig.10 A cross-sectional side view of a first connector (eg, a device end connector) and tubing of an embodiment of a medical tube assembly is shown.

[0279] Fig.11 A cross-sectional side view of a first connector (eg, a device end connector) and tube of an embodiment of a medical tube assembly is shown; in particular, it shows a heater wire and an electrical connector.

[0280] Fig.12 An exploded cross-sectional side view of the second connector (eg, patient end) and tubing of the medical tube assembly is shown.

[0281] Fig.13 A cross-sectional side view of a first connector (eg, device end) and tube of a medical tube assembly is shown.

[0282] Fig.14 A cross-sectional side view of a medical tube assembly is shown.

[0283] Fig.15 A perspective view of a first connector (eg, device end) and tube of a medical tube assembly is shown; in particular, it shows Figures 16 to 19 The location of the cross section is shown in .

[0284] Fig.16 A perspective view showing a cross section of a main body portion of a tube of a medical tube assembly is shown.

[0285] Fig.17 A perspective view of a cross section of a portion of a tube with increasing gas passage cross-sectional area is shown.

[0286] Fig.18 A perspective view of a cross section of a medical tube assembly is shown, including a tube connecting portion of a connector of the medical tube assembly.

[0287] Fig.19 A perspective view of a cross section of a medical tube assembly is shown, including the cuff region of the tube.

[0288] Figure 20 to Figure 22A cross section of the tube is shown, illustrating the increasing gas passage cross-sectional area portion of the tube and the different cross-sectional areas of the gas passage of the main body portion.

[0289] Fig.23 A cross-sectional side view of the second connector (eg, the patient end) and the tube of a medical tube assembly is shown; in particular, it illustrates the relative sizes of the tube connection portion and the associated connector.

[0290] Fig.24 A cross-sectional side view of the second connector (eg, the patient end) and the tube of a medical tube assembly is shown; in particular, it illustrates the relative sizes of the tube and associated connector. DETAILED DESCRIPTION

[0291] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0292] Medical tubing may be used in breathing circuits or systems, for example, in obstructive sleep apnea, respiratory humidification, and surgical humidification systems (including insufflating systems and systems for patients undergoing surgery under general anesthesia) for delivering and / or removing humidified gases from a patient.

[0293] The present application relates to medical tubing assemblies, medical tubing and connectors for use in a breathing circuit or breathing system. The medical tubing and connectors can be used, for example, in obstructive sleep apnea, respiratory humidification, and surgical humidification systems (including insufflation systems and systems for patients undergoing surgery under general anesthesia) to deliver and / or remove humidified gases from a patient.

[0294] Medical tubing assemblies can be used to transport gas between two components of a breathing circuit. Medical tubing assemblies can be used to transport gas between a component and a patient. For example, between a humidifier and a patient.

[0295] In some embodiments, the medical tube may be an inhalation tube, an expiratory tube, a patient interface tube, a supply tube, a drying line, an insufflation tube, or the like.

[0296] A medical tube assembly may include one or more medical tubes and one or more connectors.

[0297] Tubes for use in breathing devices can be designed to reduce flow resistance, for example, see: U.S. patent application No. 16 / 317,920 published as U.S. patent application publication No. 20210252248 and PCT publication No. WO 2018 / 016975 entering the national phase, U.S. patent application No. 13 / 698,272 published as U.S. patent application publication No. 20130112201 and PCT publication No. WO 2011 / 149362 entering the national phase, U.S. patent application No. 16 / 970,510 published as U.S. patent application publication No. 20210077765 and PCT publication No. WO 2019 / 164409 entering the national phase, U.S. patent application No. 16 / 964,411 published as U.S. patent application publication No. 20210046272 and PCT publication No. WO 2019 / 147142 entering the national phase, all of which are incorporated herein by reference.

[0298] This application claims priority to U.S. Provisional Patent Application No. 63 / 366,611 filed on June 17, 2022, the entire contents of which are incorporated herein by reference in their entirety.

[0299] The medical tubes, connectors, and medical tube assemblies described herein may be provided in one or more breathing systems, breathing circuits, or kits.

[0300] The pneumatic compliance of a breathing circuit can be a design consideration for tubes and tube assemblies that are part of a breathing circuit. Pneumatic compliance can be measured by the change in volume of the tube, medical tube assembly, and / or breathing circuit at a given pressure change. Pneumatic compliance may be of particular importance when providing low tidal volumes of gas to a patient (e.g., in a neonatal and / or pediatric environment). The lower the compressible volume of the breathing circuit, the lower the pneumatic compliance of the breathing circuit for a fixed stiffness. The accuracy of tidal volume delivery may be important in ensuring that adequate treatment is provided to the patient, for example, the lower the pneumatic compliance of the breathing circuit relative to the patient's lung compliance, the less likely there is an error in the delivered tidal volume. The overall pneumatic compliance of the breathing circuit can be based, for example, on the initial volume of the breathing circuit and the stiffness of various components (low stiffness can cause an increase in volume).

[0301] Another design consideration is the flow resistance of the breathing circuit. The flow resistance can be measured by the gas pressure drop at a given flow rate. The higher the flow resistance in the breathing circuit, the more difficult it is for the gas source to provide a given flow rate and / or the more difficult it is for the patient to exhale. Reducing the flow resistance can be achieved by, for example, increasing the diameter of the tube or connector, however this will also increase the pneumatic compliance as described above (by increasing the total compressible volume of the circuit), which may be undesirable. Therefore, there may be a compromise between keeping both pneumatic compliance and flow resistance desirably low. It may be particularly desirable to reduce the flow resistance of the circuit (e.g., by reducing the flow resistance of the tube of the circuit) without significantly affecting the pneumatic compliance of the circuit.

[0302] The present disclosure describes various tubes and tube assemblies that can reduce overall flow resistance while not significantly affecting aerodynamic compliance.

[0303] One example of a way to reduce the flow resistance of a medical tube assembly is by increasing the cross-sectional area of ​​the gas passage of the connector 100 (described in more detail below). However, this may be constrained by the diameter of the tube and the type of connection (e.g., a barb-type connection with a collar), because the gas passage of the connector may need to be disposed inside the tube, which may introduce restrictions on flow. One way to deal with this problem is to increase the cross-sectional area of ​​the gas passage tube itself, however, as described above, this will increase the compressible volume of the assembly and therefore increase the pneumatic compliance. The incremental gas passage cross-sectional area of ​​the tube (described in more detail below) is disposed at or near the end of the tube, which can allow the cross-sectional area of ​​the gas passage of the connector 100 to be increased while still providing a barb-type connection with a collar. This can provide a relatively small increase in the compressible volume (and pneumatic compliance) of the medical tube assembly, but a relatively large reduction in the flow resistance of the medical tube assembly, and a tube that performs better overall.

[0304] Medical tubes may be used to deliver and / or remove humidified gases from a patient, such as in obstructive sleep apnea, respiratory humidification, and surgical humidification systems (including insufflation systems and systems for patients undergoing surgery under general anesthesia). Medical conduits may be used to deliver breathing gases to and / or from a patient as part of respiratory therapy or treatment. Breathing gases may be heated and / or humidified prior to delivery to the patient, for example, to reduce the likelihood of infection and / or tissue damage.

[0305] Figure 1 Schematically illustrated is an example respiratory assistance apparatus comprising a breathing circuit including one or more tubes 170, 172, a patient interface 180, and a Y-piece 113. The respiratory assistance apparatus may be a ventilator, a continuous, variable, or bi-level positive airway pressure (PAP) system, or other forms of respiratory therapy, such as high flow therapy.

[0306] Gas can be Figure 1 Dry or relatively dry gas is delivered from the gas source 105 through the supply tube 157 (or interchangeably the drying line 130, e.g. Figure 2 and Figure 3 1) to a humidifier 107 which humidifies the dry gas. The gas source 105 may be, for example, a ventilator or a blower. The gas source 105 may draw air from the surrounding environment and / or from a gas reservoir (e.g., an oxygen source, such as an oxygen cylinder), as described in more detail below. The humidifier 107 is connected to an end 109 of an inspiratory tube 170 via a port 112. The inspiratory tube 170 is optionally connected to a patient 190 via a patient interface 180 using a Y-piece 113. An optional expiratory tube (such as expiratory tube 172) is also connected to the patient interface 180 via the Y-piece 113. The expiratory tube 172 may be configured to remove exhaled gas from the patient 190. As shown in FIG. Figure 1 As shown, expiratory tube 172 returns exhaled gases from patient 190 to gas source 105. Alternatively, inspiratory tube 170 is connected directly to patient interface 180 without Y-piece 113. In such an embodiment, exhaled gases are allowed to flow directly to the surrounding environment.

[0307] The inspiratory tube 170 may include a conductive element, such as a heater and / or sensor element 145. Similarly, the expiratory tube 172 may include a heater and / or sensor element 147. Further, the Y-piece 113 and the patient interface 180 may also include a heater and / or sensor element. As will be explained in further detail below, the heater and / or sensor elements 145, 147 may be wires or filaments.

[0308] The heater and / or sensor element 145 may be located in the wall of the tube, around the tube (eg, wrapped around the outer surface of the tube), or within the gas passage of the tube.

[0309] In some configurations, the heater and / or sensor element 145 can be connected to the sensor 135 to communicate any output from the sensor to the controller 123 .

[0310] The heater and / or sensor element 145 may include a single heating element and / or sensor element. For example, the heater and / or sensor element 145 may include a pair of heating elements and a pair of sensor elements.

[0311] In some configurations, the heater and / or sensor element 145 includes only a heating element, and the one or more sensors 135 are electrically connected to the controller via leads 136, such as Figure 3 shown.

[0312] like Figure 1 As shown in the example respiratory assistance device of , gas (e.g., dry or relatively dry gas relative to humidified gas delivered to the user) enters the gas source 105 through the vent 119. The fan 118 can facilitate the flow of gas into the gas source 105 by drawing air or other gas through the vent 119. The fan 118 can be, for example, a variable speed fan, wherein the electronic controller 123 controls the fan speed. In some embodiments, the electronic controller 123 can also be controlled by the second electronic controller 125, and vice versa.

[0313] The humidifier 107 may include a humidification chamber 129 containing a quantity of water 122 or other suitable humidifying liquid. The humidification chamber 129 may be removable from the humidifier 107. The humidification chamber 129 may include a highly thermally conductive base (e.g., an aluminum base) in contact with or associated with a heating plate 132 on the humidifier 107.

[0314] The humidifier 107 may also include electronic controls. Figure 1 In the embodiment of the present invention, the humidifier 107 includes an electronic, analog or digital controller 125. The controller 125 can be a microprocessor-based controller that executes computer software commands stored in an associated memory. In response to humidity, temperature or other feedback values ​​provided via a user interface 133 and / or an integrated sensor, the controller 125 determines heat, flow, pressure and / or other variables used to provide humidified gas to a patient (also referred to as a user herein). The user interface 133 can be one or more hardware buttons and / or a display or a touch screen display. The display can provide audio and / or visual feedback to the user. When condensation is detected, any number of alarms, warnings, feedback, guidance or instructions can be provided to the user to indicate the presence, degree or remedial measures of the condensation condition. For example, when condensation is detected, the user interface can provide an alarm. The user interface can provide a visual indication of condensation. The user interface can also provide animations for guiding the user how to properly discharge condensation.

[0315] Any suitable patient interface may be used. Patient interface is a broad term and is to be given the ordinary and customary meaning to one of ordinary skill in the art (i.e., it is not limited to a special or customary meaning) and includes, but is not limited to, masks (such as endotracheal masks, face masks, and nasal masks), endotracheal tubes, tracheostomy tubes, cannulas, and nasal pillows. One or more sensors 135 (e.g., temperature probes) may be incorporated into or connected to the inspiratory tube 170 near the Y-piece 113, or directly connected to the Y-piece 113 or the patient interface 180. The temperature probe 135 monitors the temperature of the gas flow near or at the patient interface 180. A heating wire (such as element 145) may be used to adjust the temperature of the patient interface 180, the Y-piece 113, and / or the inspiratory tube 170 to maintain the temperature of the gas flow above the saturation temperature, thereby reducing the chance of unwanted condensation, and / or delivering gas at an optimal temperature for patient therapy (e.g., 40°C at the patient end of the inspiratory tube and / or 37°C for patients undergoing non-invasive therapy). As Figure 1 As shown, exhaled gas is optionally returned from patient interface 180 to gas source 105 via exhalation tube 172 .

[0316] In some configurations, the one or more sensors 135 can include a thermistor. In examples where the one or more sensors are temperature probes, the thermistor can be part of the temperature probe.

[0317] In some embodiments, additional conduits such as interface conduit 185 may be connected between the inspiratory tube 170 and the patient interface 180. It should be understood that other variations of the system shown may exist. For example, the inspiratory tube 170 may include multiple sections to accommodate other equipment, such as a water collector, an intermediate connector, and optionally one or more sensors, PCBs, and / or controllers.

[0318] Figure 1 The system can be easily adapted for other applications involving supplying heated and / or humidified gas streams to a user or patient, including but not limited to laparoscopy, etc. Such applications can use alternative gases, operating parameters (e.g., flow, pressure, temperature, or humidity) and patient interfaces. Further, although a separate ventilator and humidifier system is shown, it should be understood that the present disclosure can also be used with an integrated ventilator / blower and humidifier system. For example, the gas source 105 can be integrated with the humidifier 107 or the gas source 105 can be a component separated from the humidifier 107.

[0319] Figure 1 The system can also provide oxygen (O2) or O2 components to the user through port 149. Figure 1The system can receive O2 from a remote source and / or receive O2 by mixing atmospheric air with incoming O2 from a remote source. The mixing of atmospheric air with incoming O2 can occur via a venturi or similar inlet located in the gas source 105 or humidifier 107.

[0320] Figure 2 and Figure 3 Schematically illustrated are embodiments of respiratory assistance devices 100A and 100B that may include one or more of the medical tubes described herein. Figure 2 and Figure 3 In the illustrated embodiment, the breathing system 100A, 100B includes a gas source 105 that is integrated with a humidifier 107 or is a separate component from the humidifier 107 .

[0321] Figure 3 An example system including an expiratory tube 172 and an inspiratory tube 170 is shown.

[0322] Gas source 105 and humidifier 107 supply heated and humidified gas to patient 190 via a breathing circuit including, for example, inspiratory tube 170 and patient interface 180, such as Figures 1 to 3 What is shown.

[0323] For example, as described above, one or more sensors 135 can be connected to the inspiratory tube 170 near the patient interface 180, or one or more sensors 135 can be connected to the patient interface 180 as well as other possible sensor locations. One or more sensors 135 can be integrated into the inspiratory tube 170 or can be connected to the inspiratory tube 170. In some configurations, the system includes two sensors 135, wherein a first sensor 135 is positioned at or near the humidifier chamber outlet end of the inspiratory tube 170 and a second sensor 135 is positioned at the patient end of the inspiratory tube 170 (e.g., Figure 3 shown).

[0324] As described above in some configurations, for example Figure 3 As shown, one or more sensors 135 may be electrically connected to the device controller via leads 136 .

[0325] In some configurations, one or more sensors 135 can be connected to the sensor port 360 of the connector and / or the sensor port of the inhalation tube (or the connector of the inhalation tube). Alternatively or in addition, one or more sensors 135 can be disposed at or near the humidifier chamber entrance. The signals provided by the one or more sensors 135 can be provided, for example, to a control system (e.g., such as Figure 1In some embodiments, the one or more sensors 135 include one or more of a temperature sensor, a humidity sensor, a flow sensor, and a pressure sensor. Figure 3 , sensors 135 are shown connected to the patient end and chamber outlet end of the inspiratory tube 170, but alternatively or additionally, one or more sensors may be included at other locations on the inspiratory tube 170 and / or on other medical tubes or components in the respiratory system.

[0326] It will be understood that reference Figure 2 The described sensor arrangement can be applied to Figure 1 system.

[0327] It should be understood that other variations of the system shown may exist. For example, the inspiratory tube 170 and / or the expiratory tube 172 may include multiple sections to optionally accommodate other equipment, such as a water collector, an intermediate connector with one or more sensors, a PCB and / or a controller. In another example embodiment, the system may therefore include a nebulizer or a port. In another example embodiment, the system may include a cannula mount or an expiratory valve (e.g., a PEEP valve).

[0328] The medical tubing assemblies, medical tubing and / or connectors may also be provided as a breathing kit.

[0329] In some configurations, the breathing set may include an inspiratory tube 170 , an expiratory tube 172 , and a humidification chamber 129 .

[0330] In some configurations, the breathing set may include an inspiratory tube 170 , an expiratory tube 172 , a humidification chamber 129 , and a Y-piece 113 .

[0331] In some configurations, the breathing set may include an inspiratory tube 170 , an expiratory tube 172 , a humidification chamber 129 , a Y-piece 113 , and a drying line 130 .

[0332] In some configurations, the breathing set can include an inspiratory tube 170, an expiratory tube 172, a humidification chamber 129, a Y-piece 113, a drying line 130, and a filter.

[0333] The breathing set may also include at least one of the following: a pressure line, an interface extension tube (eg, interface catheter 185), one or more adapters.

[0334] Where a gas channel is described herein, it will be appreciated that the gas channel may be a breathing gas channel for delivering breathing gas to and / or from a patient (eg, via a patient interface).

[0335] The gas passageway of the medical tube assembly may be defined by multiple components of the medical tube assembly, as described below.

[0336] The configuration as described relates to the expiratory tube, however it will be appreciated that the present disclosure is equally applicable to the inspiratory tube, or any other tube in the breathing circuit.

[0337] The medical tube assembly 1 and tube 5 are shown as specific lengths in at least some of the figures, however it will be appreciated that the medical tube assembly 1 and tube 5 may be any length.

[0338] Throughout the specification, where the term "cross-sectional area of ​​a gas passage" is used, it may refer to the cross-sectional area of ​​the gas passage in a direction perpendicular to the longitudinal axis of the gas passage. However, as described in more detail below, the cross-sectional area of ​​the corrugated portion may be defined with reference to the corrugations (e.g., including crests and troughs).

[0339] The medical tube assembly 1 may be provided as part of an exhalation pathway (eg, to provide a pathway for exhaled gases from a patient back to a device (eg, a gas source)). The exhalation pathway also forms part of a breathing circuit.

[0340] The expiratory pathway may include an expiratory conduit 172 , a filter, and a Y-piece 113 .

[0341] In some configurations, the exhalation pathway Y-piece 113 can be a swivel adapter.

[0342] As described above, the disclosed medical tube assembly 1 can reduce flow resistance (relative to a tube assembly not having one or more of the disclosed features and / or cross-sectional area / diameter) while balancing pneumatic compliance considerations. As described above, this may be particularly important in neonatal and / or pediatric patients who are being delivered small tidal volumes. In these cases, it is desirable to reduce flow resistance to allow the patient to exhale through the expiratory passageway while maintaining / balancing pneumatic compliance to ensure accurate delivery of tidal volumes.

[0343] For example, the diameter / cross-sectional area of ​​the tube connection portion may be increased to a minimum diameter of about 10 mm to about 16 mm, and / or about 100 mm. 2 To about 150mm 2 The minimum cross-sectional area.

[0344] The diameter and / or cross-sectional area of ​​the tube connection portion may be able to be increased by providing, for example, an increasing gas passage cross-sectional area portion 35 , 235 , in order to eliminate potential flow restrictions and reduce flow resistance of the medical tube assembly 1 .

[0345] In some configurations, there may be a flow resistance (e.g., defined by a pressure drop across the exhalation pathway) in the exhalation pathway. In some configurations, the pressure drop across the exhalation pathway may be less than 1.8 cmH2O for a gas flow of 30 liters / minute, or less than 1.8 cmH2O for a gas flow of 15 liters / minute, or less than 1.85 cmH2O for a gas flow of 2.5 liters / minute. In some configurations, the pressure drop across the exhalation pathway may comply with ISO 5367:2014.

[0346] It will be appreciated that the medical tube assembly as described herein may be an expiratory tube 172 as part of a breathing circuit. The breathing circuit may include one or more of the following: a drying line 130 (which may also be referred to as a supply tube 157) extending from a gas source 105 and / or configured to extend from a gas source 105, a humidification chamber (or other humidifier flow path) configured to connect to the drying line 130 or the supply tube 157, an inspiratory tube 170 configured to connect the chamber or humidifier to a Y-piece 113, a Y-piece 113, and an expiratory conduit 172 (e.g., a tube as described above) configured to connect to the Y-piece 113.

[0347] In some configurations, the breathing circuit can have a pneumatic compliance. In some configurations, the pneumatic compliance of the breathing circuit can be less than 1.5 ml / cmH2O at 60 cmH2O. In some configurations, the pneumatic compliance of the breathing circuit can be less than 4 ml / cmH2O at 60 cmH2O. In some configurations, the pneumatic compliance of the breathing circuit can be less than 5 ml / cmH2O at 60 cmH2O. The pneumatic compliance can comply with ISO 5367:2014.

[0348] Figures 4 to 8 An example of a medical tube assembly 1 is shown. The medical tube assembly comprises a tube 5. The tube 5 defines a gas passage 6 extending from a first end 10 of the tube 5 to a second end 20 of the tube 5.

[0349] The described gas passages may allow gas to pass in any direction. However, in some configurations, a medical tube assembly may be provided as part of a breathing circuit, and gas may flow in only one direction in normal use.

[0350] like Figures 4 to 10As shown, the tube 5 includes a main body portion 30 and at least one gradually increasing gas passage cross-sectional area portion 35, 235. As described in more detail elsewhere, the at least one gradually increasing gas passage cross-sectional area portion 35, 235 can allow the cross-sectional area of ​​the gas passage of the tube connection portion 110, 210 to be increased (relative to the tube without the gradually increasing gas passage cross-sectional area portion 35, 235) to eliminate potential flow restrictions and reduce the flow resistance of the medical tube assembly 1.

[0351] Figures 4 to 7 The increasing gas passage cross-sectional area portions 35, 235 at both ends of the tube are shown, however it will be appreciated that in some configurations, the increasing gas passage cross-sectional area portions 35, 235 may only be present at a single end of the tube. The cross-sectional area of ​​the increasing gas passage cross-sectional area portions 35, 235 increases in a direction toward the end 10, 20 of the tube 5 with which it is associated. For example, the gas passage cross-sectional area of ​​the increasing gas passage cross-sectional area portion 35 at the first end 10 of the tube 5 increases toward the first end 10 of the tube 5, and the gas passage cross-sectional area of ​​the gas passage cross-sectional area portion 235 at the second end 20 of the tube 5 increases toward the second end 20 of the tube 5.

[0352] For example, in Figure 8 In the illustrated medical tube assembly 1 , the increasing gas passage cross-sectional area portion 35 is present only at the first end 10 of the tube 5 .

[0353] like Figures 4 to 7 The illustrated medical tube assembly 1 comprises a first connector 100 and a second connector 200. The first connector 100 is connected to a first end 10 of the tube 5 and the second connector 200 is connected to a second end 20 of the tube 5. Each of the first connector 100 and the second connector 200 defines a gas passage 101, 201 extending through the connector.

[0354] The first connector 100 can be a device-end connector, which is configured to be connected to a device (or itself connected to a component of a device), such as a gas source (optionally, the medical tube assembly is an expiratory tube). In some examples, the first connector is connected to another component.

[0355] Second connector 200 may be a patient-end connector configured to connect to Y-piece 113 and / or patient interface 180 (or another component that is itself connected to Y-piece 113 and / or patient interface 180), for example. In some examples, the second connector connects to another component.

[0356] The gas channel 6 of the tube 5 defines, in combination with the gas channel 101 of the connector 100 and the gas channel 201 of the second connector 200, a gas channel of the medical tube assembly.

[0357] As described in more detail below, the connector 100 , 200 may include a tube connecting portion 110 , 210 that is configured to be disposed inside the tube 5 when the connector 100 , 200 is connected to the tube 5 .

[0358] As described in more detail below, the medical tube assembly 1 may include a collar 120, 220. The collar 120, 220 is configured to engage an outer surface of the tube 5 when the connector 100, 200 is connected to the tube 5.

[0359] like Figure 7 As shown, the tube 5 is held between the collar 120, 220 and the tube connecting portion 110, 210 of the connector 100, 200. In some configurations, the cuff 40, 240 of the tube 5 is held between the collar 120, 220 and the tube connecting portion 110, 210 of the connector 100, 200. This type of connection may be beneficial when the tube 5 undergoes changes in size and / or material properties when exposed to water, as disclosed in more detail below.

[0360] In some configurations, the tube 5 may be compressed between the collar 120 , 220 and the tube connecting portion 110 , 210 (when the tube is held therebetween).

[0361] Throughout this specification, the medical tube assembly 1 is described as having a connector 100, 200 and a collar 120, 220 at both ends of the tube, however in some configurations, the connector 100, 200 and collar 120, 220 may be provided at a single end.

[0362] Features of the connectors 100 , 200 and ferrules 120 , 220 are described below with respect to two connectors 100 , 200 and two ferrules 120 , 220 , however, it will be appreciated that each of the connectors 100 , 200 and each of the ferrules 120 , 220 may include any combination of the described features.

[0363] The connectors 100, 200 may be configured to connect to an associated connector in order to couple the medical tube assembly at each end to the associated connector.

[0364] The breathing gas passage of the tube may be cylindrical.

[0365] The tube as shown in the drawings is generally cylindrical, however it will be appreciated that tubes of other shapes are included within the definition of the term "tube" and that portions of the tube may be of non-circular cross-section.

[0366] In some configurations, at least a portion of the tube 5 is corrugated. The corrugations can provide stiffness to the tube (which can contribute to the aerodynamic compliance of the tube) while still allowing flexibility to allow a user to easily use the tube.

[0367] The corrugations may also increase the surface area of ​​the tube 5. In configurations where the tube is a gas permeable material, this may increase the surface area (eg, internal and external) available for water molecules to pass to the surrounding environment.

[0368] like Figures 4 to 7 As shown, the main body 30 of the tube 5 is a bellows. Fig. 9 As shown, the corrugations are annular corrugations, however in some embodiments the corrugations may be spiral.

[0369] The tube 5 includes a plurality of crests 56 and a plurality of troughs 57 (eg Fig. 9 ). The plurality of peaks 56 and the plurality of troughs 58 extend around the periphery of the tube (eg, the circumference in a circular tube) and alternate along the tube (ie, in a direction generally parallel to the longitudinal axis of the tube 5).

[0370] Reference again Fig. 9 , ripples can be formed by alternating peaks and troughs.

[0371] It will be appreciated that in some configurations, the tube is non-corrugated.

[0372] It will be appreciated that only a portion of the tube may be corrugated. For example, as described in more detail below, the cuff region of the tube may not be corrugated.

[0373] The tube 5 may include at least one rib 48. The rib may extend longitudinally in a direction along the length of the tube (e.g., parallel or at least partially parallel to the longitudinal axis of the tube 5). The rib 48 may be the same rib 45, 245 of the cuff region 40, 240, e.g., as Figures 9 and 10 and Figure 12 to Figure 13 In some configurations, the ribs 45 , 245 of the cuff region 40 , 240 can be separate from the at least one rib 48 .

[0374] In some configurations, the at least one rib extends longitudinally along the tube.

[0375] The rib 48 is shown in some figures (eg Figures 7 to 14 ) is shown in cross-section. However, it will be appreciated that these ribs may not be included in determining any diameter and / or cross-sectional area of ​​the gas passage, for example Figures 15 to 22 shown.

[0376] The tube 5 may include one or more ribs 48. For example, the tube 5 may include 1 to 4 ribs, or 3 ribs (e.g. Fig.16 As shown in Fig.16As shown, the ribs 48 are located on the inner surface of the tube. In some configurations, the ribs 48 can be equally spaced around the perimeter of the gas flow passage of the tube.

[0377] As described above, the cross-sectional area of ​​the gas passage may be in a direction perpendicular to the longitudinal axis of the gas passage.

[0378] The gas passage cross-sectional area 31 of the main body portion 30 of the tube 5 may be defined as follows:

[0379] a) The minimum cross-sectional area of ​​the gas passage in the main body of the tube (e.g. Fig.16 An example minimum cross-sectional area of ​​the gas passage along the length of the tube is shown in

[0380] b) The maximum cross-sectional area of ​​the gas passage in the main part of the tube.

[0381] In addition, in the configuration where the main body of the tube is corrugated, the cross-sectional area of ​​the tube can be defined by a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

[0382] In some configurations, the minimum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 100 mm 2 To about 150mm 2 , or about 100mm 2 To about 130mm 2 , or about 120mm 2 .

[0383] In some configurations, the maximum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 160 mm 2 To about 210mm 2 , or about 180mm 2 About 200mm 2 , or about 190mm 2 .

[0384] In some configurations, the nominal cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 120 mm 2 To about 180mm 2 , or about 145mm 2 To about 165mm 2 , or about 155mm 2 .

[0385] The ribs may be disregarded when defining the cross-sectional area of ​​the gas passage (e.g. Fig.16 and Fig.17 as shown, where the ribs are not included in the cross-sectional area of ​​the gas passage).

[0386] In some configurations, the minimum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 110 mm 2 To about 160mm 2 or about 130mm 2 To about 150mm 2 .

[0387] In some configurations, the maximum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 180 mm 2 To about 230mm 2 or about 190mm 2 To about 210mm 2 .

[0388] In some configurations, the nominal cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 140 mm 2 About 200mm 2 .

[0389] The gas passage cross-sectional area 31 of the main body portion 30 of the tube 5 may be defined as follows:

[0390] a) The local minimum cross-sectional area of ​​the gas passage in the main part of the tube (e.g. Fig.16 An example minimum cross-sectional area for the gas passage along the length of the tube is shown in FIG), for example when the tube is a bellows, the minimum cross-sectional area is defined by a single pair of opposing troughs, or

[0391] b) The local maximum cross-sectional area of ​​the gas passage of the main body of the tube, for example when the tube is a bellows, the maximum cross-sectional area is defined by a single pair of opposing wave crests.

[0392] like Fig. 20 As shown by way of example in FIG. 5 , the local minimum cross-sectional area 42 of the gas passage of the main body portion 30 of the tube 5 is defined by the inner surfaces of the opposing valleys 57. Fig. 20 In a tube of FIG. 4 , each local minimum cross-sectional area 42 is the same area as the minimum cross-sectional area of ​​the main body of the tube because the local minimum cross-sectional area 42 is the same area along the length of the tube.

[0393] like Fig.21 As shown by way of example in FIG. 5 , the maximum local cross-sectional area 43 of the gas passage of the main body portion 30 of the tube 5 is defined by the inner surfaces of the opposing wave peaks 58. Fig.21 In a tube of FIG. 4 , each local maximum cross-sectional area 42 is the same area as the maximum cross-sectional area of ​​the main body portion of the tube because the local maximum cross-sectional area 42 is the same area along the length of the tube.

[0394] In addition, for example Fig. 22As shown, in a configuration in which the main portion of the tube is corrugated, the cross-sectional area of ​​the tube can be defined by a local nominal cross-sectional area 44, which is an average of an area of ​​the tube gas channel defined by a trough of the tube (e.g., corresponding to a local minimum) and an area of ​​the tube gas channel defined by a peak of the tube adjacent to the trough (e.g., corresponding to a local maximum).

[0395] In some configurations, the local minimum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 100 mm 2 To about 150mm 2 , or about 110mm 2 To about 130mm 2 , or about 120mm 2 .

[0396] In some configurations, the local maximum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 160 mm 2 To about 210mm 2 , or about 180mm 2 About 200mm 2 , or about 190mm 2 .

[0397] In some configurations, the local nominal cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube is about 120 mm 2 To about 180mm 2 , or about 145mm 2 To about 165mm 2 , or about 155mm 2 .

[0398] The ribs may be disregarded when defining the cross-sectional area of ​​the gas passage (e.g. Fig.16 and Fig.17 as shown, where the ribs are not included in the cross-sectional area of ​​the gas passage).

[0399] In some configurations, the local minimum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 110 mm 2 To about 160mm 2 or about 130mm 2 To about 140mm 2 .

[0400] In some configurations, the local maximum cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 180 mm 2 To about 230mm 2 or about 190mm 2 To about 210mm 2 .

[0401] In some configurations, the local nominal cross-sectional area of ​​the gas passageway of the main body portion 30 of the tube (excluding any ribs) is about 140 mm 2 About 200mm 2 or about 160mm 2 To about 180mm 2 .

[0402] It will be appreciated that in a tube of circular cross-section the diameter of the gas passage will be proportional to the cross-sectional area of ​​the gas passage.

[0403] exist Fig. 20 , Fig.21 and Fig. 22 In the figures, the cross-sectional areas 42, 43 and 44 themselves are shown in cross-section, however they extend to define the cross-sectional area of ​​the gas passage. It will be appreciated that the cross-sectional areas as shown in these figures may also represent diameters.

[0404] The gas passage diameter 7 of the main body of the tube may be defined by:

[0405] a) the minimum internal diameter of the gas passageway in the main body of the tube, or

[0406] b) The maximum internal diameter of the gas passageway in the main body of the tube.

[0407] In some configurations, the minimum inner diameter of the main body portion 30 of the tube is about 12.45 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm). In some configurations, the minimum inner diameter of the main body portion 30 of the tube is about 12.65 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm). In some configurations, the minimum inner diameter of the main body portion 30 of the tube is about 10 mm to about 16 mm, or about 12 mm to about 14 mm.

[0408] In some configurations, the maximum inner diameter of the main body portion 30 of the tube is about 15.95 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm). In some configurations, the maximum inner diameter of the main body portion 30 of the tube is about 16.15 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm). In some configurations, the maximum inner diameter of the main body portion 30 of the tube is about 14 mm to about 18 mm, or about 15 mm to about 17 mm.

[0409] Additionally, in configurations where the main body of the tube is corrugated, the diameter of the tube may be defined by a nominal gas passage diameter which is the average of a minimum inner diameter of the gas passage of the main body of the tube and a maximum inner diameter of the gas passage of the main body of the tube.

[0410] In some configurations, the nominal diameter of the main body portion 30 of the tube is from about 12 mm to about 17 mm, or from about 13 mm to about 16 mm.

[0411] The gas passage diameter 7 of the main body portion 30 of the tube 5 may be defined by:

[0412] a) a local minimum diameter of the gas passage of the main body 30 of the tube 5, for example when the tube 5 is a bellows, the minimum diameter is defined by a single pair of opposing valleys, or

[0413] b) The local maximum diameter of the gas passage of the main body portion 30 of the tube 5, for example when the tube 5 is a corrugated tube, the maximum diameter is defined by a single pair of opposing wave crests.

[0414] In configurations where the main body of the tube is corrugated, the local nominal diameter of the gas passageway may be the average of the diameter between opposing troughs of the tube and the diameter between opposing peaks of the tube adjacent to the troughs.

[0415] In some configurations, the local minimum diameter of the main body portion 30 of the tube is about 10 mm to about 16 mm, or about 13 mm to about 15 mm, or about 12.65 mm.

[0416] In some configurations, the local maximum diameter of the main body portion 30 of the tube is about 14 mm to about 18 mm, or about 15 mm to about 17 mm, or about 16.1 mm.

[0417] In some configurations, the local nominal diameter of the main body portion 30 of the tube is about 12 mm to about 17 mm, or about 13 mm to about 16 mm, or about 15 mm.

[0418] refer to Fig.16 , the gas passage cross-sectional area 31 of the main part 30 of the tube 5 is the local minimum cross-sectional area of ​​the gas passage of the main part of the tube and is constant along the length of the tube. Fig. 20 , Fig.21 and Fig. 22 shown.

[0419] In some configurations, one or more of the following: the local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, the local maximum cross-sectional area of ​​the gas passage of the main portion of the tube, and / or the local nominal cross-sectional area of ​​the gas passage of the main portion of the tube, is constant along the length of the main portion.

[0420] In some cases, the local nominal diameter (or local nominal cross-sectional area) of the main body portion of the tube can be the same as the nominal diameter (or nominal cross-sectional area) of the tube (eg, where the corrugations are repeating and of the same size and shape).

[0421] In some cases, the local minimum diameter (or local minimum cross-sectional area) of the main body portion of the tube can be the same as the minimum diameter (or minimum cross-sectional area) of the tube (for example, where the corrugations are repeating and are the same size and shape).

[0422] In some cases, the local maximum diameter (or local maximum cross-sectional area) of the main body portion of the tube can be the same as the maximum diameter (or maximum cross-sectional area) of the tube (for example, where the corrugations are repeating and are the same size and shape).

[0423] In some configurations, one or more of: a local minimum diameter of the gas passageway of the main portion of the tube, a local maximum diameter of the gas passageway of the main portion of the tube, and / or a local nominal diameter of the gas passageway of the main portion of the tube, is constant along the length of the main portion.

[0424] like Figure 8 and Fig.11 As shown, the medical tube assembly 1 may include at least one heating wire 50 (or Figure 1 Components 145 and / or 147).

[0425] The at least one heating wire 50 may be located in the wall of the tube, around the tube (eg, wrapped around the outer surface of the tube), or within the gas passage of the tube and / or the gas passage of the connector.

[0426] like Figure 8 As shown, the heating wire 50 extends from an electrical connector 60 at the first end 10 of the tube along the length of the tube and then loops back.

[0427] refer to Fig.11 , the medical tube assembly 1 comprises an electrical connector 60 configured to allow electrical connection to the at least one heating wire 50 (eg by connection with another electrical connector).

[0428] Figure 4 , Figure 7 , Fig.10 , Fig.14 and Fig.15 The figure shows that an electrical port 50 may be present but is not shown. It will be appreciated that if the electrical port 50 is not included, the opening that allows for the port to be closed (e.g. Fig.10 However, it will be appreciated that electrical ports and / or heating wires may be included in any of the embodiments as shown in these figures.

[0429] Fig. 9 The electrical ports are also shown, but the heater wire 50 is omitted.

[0430] like Figure 7As shown. Connector 100 forms an elbow. Connector 100 can form an elbow by orienting the two parts of the connector at an angle to each other. The angle can be, for example, about 45 degrees to about 160 degrees, or about 135 degrees, or about 120 degrees.

[0431] In some configurations, connector 200 (eg, as a second connector) is a straight connector (eg, generally along an axis and / or having coaxial inlets and outlets).

[0432] The connectors 100 , 200 can be connected to any component. In some configurations, the medical tube assembly 1 is an expiratory tube 172 .

[0433] Figure 8 Also shown is the connector 200 including a port 310. This port may be used to insert a sensor 135 (for measuring gas flow characteristics as described above), or for sampling gas from the gas channel.

[0434] The tube may be made of a combination of materials or a single material. The material or material combination may be selected with regard to mechanical properties (such as stiffness) and / or processing properties (for extrusion processing).

[0435] The polymer or polymer blend may include a thermoplastic polymer. The polymer or polymer blend may include a polyolefin and / or a polyester. In some configurations, the material may include a copolyester thermoplastic elastomer with a polyether soft segment. The material may include one or more additives. In some configurations, the additive may include a blowing agent, such as a blowing agent masterbatch (comprising polyethylene and 20% or up to about 20% by weight of Clariant BIH-10E). In some configurations, the additives may include colorants and / or polymer stabilizers.

[0436] The connectors 100, 200 may be made of a polymer or a polymer blend.

[0437] As described above, the medical tube assembly 1 may include an increasing gas passage cross-sectional area portion 35 , 235 .

[0438] The increasing gas passage cross-sectional area portion 35, 235 can allow the cross-sectional area of ​​the gas passage to increase at or near the first end 10 and / or the second end 20 of the tube 5 to allow connection with the tube connection portion 110, 210 (described in more detail below). The increasing gas passage cross-sectional area portion 35, 235 can allow the tube connection portion 110, 210 to have a larger gas passage. This means that when a connection type is utilized to connect to the interior of the tube, the cross-sectional area of ​​the tube can be increased so that the connector (i.e., the first connector 100 and / or the second connector 200) does not introduce flow restrictions to the medical tube assembly. If the cross-sectional area of ​​the tube is not increased to accommodate the internal connector, the connector (i.e., the first connector 100 and / or the second connector 200) may introduce such a flow restriction relative to the rest of the tube because the cross-sectional area of ​​the connector will be smaller than the cross-sectional area of ​​the main body portion 30 of the tube 5 and will therefore introduce flow restrictions.

[0439] As described above, the increase in the cross-sectional area of ​​the tube can allow the tube connecting portion 110, 210 of the connector 100, 200 to be larger and not introduce flow restriction (relative to the main body 30 of the tube 5), while still maintaining the type of connection that holds the tube between the collar and the tube connecting portion 110, 210.

[0440] As described above, in some configurations, the tube 5 may include an increasing gas passage cross-sectional area portion 35 at or near the first end 10 of the tube 5. The increasing gas passage cross-sectional area portion 35 includes an increase in gas passage cross-sectional area in a direction toward the first end 10 of the tube 5 and / or toward the cuff region 40 (described in more detail elsewhere in this specification) of the first end 10 of the tube 5.

[0441] As described above, in some configurations, the tube 5 may include an increasing gas passage cross-sectional area portion 235 (as a second increasing gas passage cross-sectional area portion 235) at or near the second end 20 of the tube 5. The increasing gas passage cross-sectional area portion 235 includes an increase in gas passage cross-sectional area in a direction toward the second end 20 of the tube and / or toward a cuff region 240 (described in more detail elsewhere in this specification) of the second end 20 of the tube 5.

[0442] In some configurations, the increasing gas channel cross-sectional area portion 35, 235 is a trumpet-shaped portion (e.g., the cross-sectional area increases continuously, i.e., without interruption) or includes a step change (e.g., a discontinuous increase, i.e., with interruption) in the gas channel cross-sectional area (e.g., the gas channel cross-sectional area as described in more detail below).

[0443] In some configurations, when the increasing gas passage cross-sectional area portion 35, 235 is a trumpet-shaped portion, the increasing gas passage cross-sectional area portion 35, 235 includes a linear or non-linear increase in cross-sectional area.

[0444] The gas passage cross-sectional area of ​​the increasing gas passage cross-sectional area portion 35, 235 may be defined as follows:

[0445] a) The local minimum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion 35, 235 (eg Fig.17 36), for example when the tube 5 is a corrugated tube, the minimum diameter is defined by a single pair of opposing troughs, or

[0446] b) The local maximum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion 35 , 235 .

[0447] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 100 mm 2 To about 150mm 2 The local minimum cross-sectional area increases to about 140mm 2 To about 180mm 2 The local minimum cross-sectional area.

[0448] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 110 mm 2 To about 140mm 2 The local minimum cross-sectional area increases to about 150mm 2 To about 170mm 2 The local minimum cross-sectional area.

[0449] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 120 mm 2 The local minimum cross-sectional area increases to about 170mm 2 The local minimum cross-sectional area.

[0450] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 160 mm 2 To about 210mm 2 The local maximum cross-sectional area increases to about 220mm 2 To about 280mm 2 The local maximum cross-sectional area.

[0451] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 170 mm 2 About 200mm 2 The local maximum cross-sectional area increases to about 240mm 2 To about 260mm 2 The local maximum cross-sectional area.

[0452] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 190 mm 2 The local maximum cross-sectional area increases to about 250mm 2 The local maximum cross-sectional area.

[0453] The ribs may be disregarded when defining the cross-sectional area of ​​the gas passage (e.g. Fig.16 and Fig.17 as shown, where the ribs are not included in the cross-sectional area of ​​the gas passage).

[0454] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 110 mm 2 To about 160mm 2 The local minimum cross-sectional area (excluding any ribs) increases to about 150 mm 2 About 200mm 2 The local minimum cross-sectional area (excluding any ribs).

[0455] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 120 mm 2 To about 150mm 2 The local minimum cross-sectional area (excluding any ribs) increases to about 160 mm 2 To about 190mm 2 The local minimum cross-sectional area (excluding any ribs).

[0456] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can be from 125 mm 2 The local minimum cross-sectional area (excluding any ribs) is increased to 175 mm 2 The local minimum cross-sectional area (excluding any ribs).

[0457] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 180 mm 2 To about 230mm 2 The local maximum cross-sectional area (excluding any ribs) increases to about 240 mm 2 To about 300mm 2 The local maximum cross-sectional area (excluding any ribs).

[0458] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 190 mm 2 To about 220mm 2 The local maximum cross-sectional area (excluding any ribs) increases to about 250 mm 2 To about 290mm 2 The local maximum cross-sectional area (excluding any ribs).

[0459] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from 200 mm 2 The local maximum cross-sectional area (excluding any ribs) is increased to 270 mm 2 The local maximum cross-sectional area (excluding any ribs).

[0460] As in Fig. 20 As shown by way of example in FIG. 2 , each local minimum cross-sectional area 37 of the gas passage of the increasing gas passage cross-sectional area portion 35 , 235 is defined by the inner surface of a single pair of opposing valleys 57 . Fig. 20 The increasing gas passage cross-sectional area portion 35 , 235 is shown with the gas passage increasing in cross-sectional area towards the end 10 , 20 of the tube 5 (defined by the local minimum cross-sectional area 37 of the gas passage).

[0461] As in Fig.21 As shown by way of example in FIG. 2 , each maximum local cross-sectional area 38 of the gas passage of the increasing gas passage cross-sectional area portion 35 , 235 is defined by the inner surface of a single pair of opposing wave peaks 58 . Fig.21 The increasing gas passage cross-sectional area portion 35 , 235 is shown with the gas passage increasing in cross-sectional area towards the end 10 , 20 of the tube 5 (defined by the maximum local cross-sectional area 38 of the gas passage).

[0462] In addition, for example Fig. 22 As shown, in the configuration in which the increasing gas channel cross-sectional area portion 35, 235 of the tube 5 is corrugated, the cross-sectional area of ​​the increasing gas channel cross-sectional area portion 35, 235 can be defined by a local nominal cross-sectional area, which is an average of an area of ​​the gas channel of the increasing gas channel cross-sectional area portion 35, 235 defined by a trough of the increasing gas channel cross-sectional area portion 35, 235 and an area of ​​the gas channel of the tube defined by a peak of the increasing gas channel cross-sectional area portion 35, 235 adjacent to the trough. Fig. 22 The respective nominal partial cross-sectional areas 39 of the gas passages of the increasing gas passage cross-sectional area portions 35, 235 are shown. Fig. 22 The increasing gas passage cross-sectional area portion 35 , 235 is shown with the cross-sectional area of ​​the gas passage increasing towards the end 10 , 20 of the tube 5 (defined by the nominal partial cross-sectional area 38 of the gas passage).

[0463] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 120 mm 2 To about 180mm 2 The local nominal cross-sectional area increases to about 180mm 2 To about 250mm 2 The local nominal cross-sectional area.

[0464] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may be from about 130 mm 2 To about 170mm 2 The local nominal cross-sectional area increases to about 190mm 2 To about 240mm 2 The local nominal cross-sectional area.

[0465] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can be from 160mm 2 The local nominal cross-sectional area (excluding any ribs) is increased to 220 mm 2 The local nominal cross-sectional area of ​​the steel (excluding any ribs).

[0466] When the increasing gas passage cross-sectional area portion 35, 235 is corrugated, the increase in gas passage cross-sectional area may be linear or non-linear across the plurality of corrugations.

[0467] exist Fig. 20 , Fig.21 and Fig. 22 In the figures, the cross-sectional areas 37, 38 and 39 themselves are shown in cross-section, however they extend to define the cross-sectional area of ​​the gas passage. It will be appreciated that the cross-sectional areas as shown in these figures may also represent diameters.

[0468] The gas passage diameter of the increasing gas passage cross-sectional area portion 35, 235 of the tube may be defined by:

[0469] a) the local minimum inner diameter of the gas passage in the portion of the increasing gas passage cross-sectional area, or

[0470] b) The local maximum inner diameter of the gas channel in the portion of the gas channel cross-sectional area that increases gradually.

[0471] In some configurations, the minimum local inner diameter of the increasing gas passage cross-sectional area portion 35, 235 of the tube increases from about 12.45 mm (±0.3 mm or ±0.5 mm or ±1.0 mm) to about 14.75 mm (±0.3 mm or ±0.5 mm or ±1.0 mm).

[0472] In some configurations, the maximum local inner diameter of the increasing gas passage cross-sectional area portion 35, 235 of the tube increases from about 15.95 mm (±0.3 mm or ±0.5 mm or ±1.0 mm) to about 18.25 mm (±0.3 mm or ±0.5 mm or ±1.0 mm).

[0473] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may increase from a minimum local inner diameter of about 10 mm to a minimum local inner diameter of about 17 mm.

[0474] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may increase from a minimum local inner diameter of about 12 mm to a minimum local inner diameter of about 15 mm.

[0475] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may increase from a minimum local inner diameter of about 12.65 mm to a minimum local inner diameter of about 14.95 mm.

[0476] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a minimum local inner diameter of about 10 mm to about 16 mm to a minimum local inner diameter of about 12 mm to about 17 mm.

[0477] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a maximum local inner diameter of about 14 mm to a maximum local inner diameter of about 20 mm.

[0478] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a maximum local inner diameter of about 16 mm to a maximum local inner diameter of about 19 mm.

[0479] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a maximum local inner diameter of about 16.10 mm to a maximum local inner diameter of about 18.45 mm.

[0480] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a maximum local inner diameter of about 14 mm to about 18 mm to a maximum local inner diameter of about 16 mm to about 20 mm.

[0481] In addition, in the configuration where the increasing gas channel cross-sectional area portion 35, 235 of the tube is corrugated, the cross-sectional area of ​​the increasing gas channel cross-sectional area portion 35, 235 can be defined by a local nominal gas channel diameter, which is the average of the diameter between the relative troughs of the tube and the diameter between the relative peaks of the tube adjacent to the relative troughs.

[0482] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a local nominal gas passage diameter of about 12 mm to about 17 mm to a local nominal gas passage diameter of about 14 mm to about 19 mm.

[0483] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a local nominal gas passage diameter of about 12 mm to about 17 mm to a local nominal gas passage diameter of about 15 mm to about 18 mm.

[0484] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 can increase from a local nominal gas passage diameter of about 12 mm to about 17 mm to a local nominal gas passage diameter of about 14 mm to about 18.5 mm.

[0485] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may increase from a local nominal gas passage diameter of approximately 14.4 mm to a local nominal gas passage diameter of 16.7 mm.

[0486] In some configurations, the increasing gas passage cross-sectional area portion 35, 235 may include a step-variable increase. In some configurations, when the increasing gas passage cross-sectional area portion 35, 235 is corrugated, the step-wise increase may occur in a single corrugation.

[0487] For example, when the gas channel is Figures 4 to 10 When shown as a circle, the gas passage 6 of the tube 5 in the increasing gas passage cross-sectional area portion 35 is defined at least by the diameter of the gas passage 6 of the tube 5 in the increasing gas passage cross-sectional area portion 35, 235. Therefore, the increasing gas passage cross-sectional area portion 35, 235 can have an increasing diameter.

[0488] The increasing gas passage cross-sectional area portion 35 at or near the first end 10 of the tube 5 may include an increase in gas passage diameter in a direction toward the first end 10 of the tube 5 and / or toward the cuff region 40 of the first end 10 of the tube 5 .

[0489] The increasing gas passage cross-sectional area portion 235 at or near the second end 20 of the tube may include an increase in gas passage diameter in a direction toward the second end 20 of the tube 5 and / or toward the cuff region 240 of the second end 20 of the tube 5 .

[0490] As described above, the increasing gas passage cross-sectional area portion 35 , 235 may include a linear or non-linear increase in the diameter of the gas passage along the length of the increasing gas passage cross-sectional area portion 35 , 235 .

[0491] As described above, the increasing gas passage cross-sectional area portion 35, 235 may include a step-wise increase in the gas passage.

[0492] The increasing gas passage cross-sectional area portion 35 at or near the first end 10 of the tube 5 extends from a first position away from the first end 10 of the tube 5 (at a distance from the first end) to a position at or near the first end 10 of the tube 5. The increasing gas passage cross-sectional area portion 35 at or near the first end 10 of the tube 5 extends from a first position away from the first end 10 of the tube 5 to a position at or near the first end 10 of the tube 5.

[0493] like Figures 4 to 10As shown, the increasing gas passage cross-sectional area portion 35 , 235 extends from the main body portion 30 of the tube 5 .

[0494] The increasing gas passage cross-sectional area portion 35 extends from the main body portion 30 toward the first end 10 of the tube 5, and the increasing gas passage cross-sectional area portion 235 extends from the main body portion 30 toward the second end 20 of the tube 5. However, as described elsewhere in this specification, it will be appreciated that in some examples, only one end of the tube may have an associated increasing gas passage cross-sectional area portion 35, 235 (e.g., Figure 8 shown).

[0495] In some configurations, for example Figures 4 to 10 As shown, the increasing gas passage cross-sectional area portion 35, 235 extends from the main body portion toward the cuff region 40, 240.

[0496] The increasing gas passage cross-sectional area portion 35 at or near the first end 10 of the tube 5 includes a cross-sectional area of ​​the gas passage of the tube 5 that increases in a direction from the body 30 of the tube 5 toward the first end 10 of the tube 5 .

[0497] The increasing gas passage cross-sectional area portion 235 at or near the second end 20 of the tube 5 includes a cross-sectional area of ​​the gas passage of the tube 5 that increases in a direction from the body 30 of the tube 5 toward the second end 20 of the tube 5 .

[0498] like Figures 4 to 10 As shown, the increasing gas passage cross-sectional area portions 35, 235 of the tube 5 are corrugated. However, in other configurations, one or both of the increasing gas passage cross-sectional area portions 35, 235 of the tube 5 may not be corrugated.

[0499] In the configuration where the increasing gas channel cross-sectional area portion 35, 235 is corrugated, the increasing gas channel cross-sectional area portion 35, 235 may be defined by a plurality of corrugations. The number of corrugations may be from about 1 to about 10 corrugations, or from about 2 to about 7 corrugations, or from about 2 to about 5 corrugations, or from about 2 to about 2.5 corrugations. For example Figures 4 to 10 As shown, the increasing gas passage cross-sectional area portion 35 has about 2 to about 2.5 corrugations.

[0500] like Figure 7 As shown, the main body portion of the tube transitions to an increasing gas passage cross-sectional area portion 35 near the end of the first end of the tube.

[0501] like Figure 7As shown, when the tube 5 is connected to the connector 100, 200, the end of the increasing gas channel cross-sectional area portion 35, 235 is located at the end of the tube connecting portion 110, 120, the connector 100, 200 and / or the ring 120, 220.

[0502] like Figure 6 to Figure 7 As shown, the tube includes a cuff region 40, 240. The cuff region 40 is located at or near the first end 10 of the tube 5. The cuff region 240 is located at or near the second end 20 of the tube 5. As shown, both ends of the tube 5 have an associated cuff region 40, 240, however, in some configurations, only a single end of the tube 5 will include a cuff region.

[0503] The cuff region 40 , 240 extends from the increasing gas passage cross-sectional area portion 35 , 235 .

[0504] exist Figure 8 In the embodiment of FIG. 5 , the cuff region 240 of the second connector 200 extends from the main body portion 30 of the tube 5 .

[0505] The cuff region 40 extends towards the first end 10 of the tube 5 .

[0506] The cuff region 40 of the first end 10 of the tube 5 is configured to engage with the tube connecting portion 110 of the connector 100 .

[0507] The cuff region 240 extends towards the second end 10 of the tube 5 .

[0508] The cuff region 240 of the second end 20 of the tube 5 is configured to engage with the tube connecting portion 210 of the second connector 200 .

[0509] The cuff region 40, 240 includes at least one rib 45, 245, e.g. Figures 9 and 10 and Figure 12 to Figure 13 shown.

[0510] The cuff region 40 , 240 comprises at least one rib 45 , 245 oriented parallel or at least partially parallel to the longitudinal axis of the tube 5 .

[0511] The ribs 45, 245 of the cuff region 40, 240 may be the same ribs 48 as described above and shown in the figures, or separate ribs.

[0512] like Fig.10 As shown, the at least one rib 45 , 245 is configured to engage with the retention feature 121 , 221 of the collar 120 , 220 and / or the tube connecting portion 110 , 210 of the connector 100 , 200 .

[0513] The at least one rib 45,245 may provide a portion that the collar 120,220 and / or the tube connection portion 110,210 may engage to assist in retaining the tube 5. For example, the rib 45,245 may be compressed between the collar 120,220 and / or the tube connection portion 110,210.

[0514] In some configurations, for example Figure 7 As shown, the rib 45 extends along the length of the tube 5 from the cuff region 40 at the first end of the tube to the cuff region 240 at the second end of the tube 20 as a single rib 45, 245. In some configurations, the ribs may be discontinuous.

[0515] The cuff region 40, 240 can have a maximum cross-sectional area and / or a minimum cross-sectional area and / or a nominal internal cross-sectional area that is larger than the cross-sectional area of ​​the gas passage of the main portion 30 of the tube 5 (e.g., any of the maximum cross-sectional area, the minimum cross-sectional area, the nominal cross-sectional area, the local maximum cross-sectional area, the local minimum cross-sectional area, and / or the nominal local cross-sectional area of ​​the gas passage of the main portion of the tube).

[0516] The cuff region 40 , 240 may have an inner diameter that is larger than the gas passage cross-sectional area of ​​the main body portion 30 of the tube 5 .

[0517] In some configurations, the minimum inner diameter of the cuff is about 16.10 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm).

[0518] In some configurations, the minimum inner diameter of the cuff is about 18.45 mm (± 0.3 mm or ± 0.5 mm or ± 1.0 mm).

[0519] In some configurations, the minimum inner diameter of the cuff is about 14 mm to about 19 mm.

[0520] In some configurations, the minimum internal cross-sectional area excluding ribs is about 170 mm 2 To about 220mm 2 , or about 190mm 2 To about 210mm 2 , or about 200mm 2 .

[0521] In some configurations, the minimum internal cross-sectional area 78 is about 180 mm 2 To about 230mm 2 , or about 190mm 2 To about 210mm 2 , or about 200mm 2 .

[0522] like Figures 4 to 5As shown, the cuff region 40, 240 is non-corrugated. In some configurations, the cuff region 40, 240 can be corrugated.

[0523] In some examples, the cuff region 40, 240 can have a maximum cross-sectional area and / or minimum cross-sectional area and / or nominal internal cross-sectional area that is larger than the gas passage cross-sectional area (and optionally any or all of the local minimum cross-sectional areas) of an adjacent increasing gas passage cross-sectional area portion 35 (e.g., any of the maximum cross-sectional area, minimum cross-sectional area, nominal cross-sectional area, local maximum cross-sectional area, local minimum cross-sectional area, and / or nominal local cross-sectional area of ​​the gas passage of the main body portion of the tube).

[0524] As described above, the medical tube assembly 1 may include the collar 120, 220. The collar 120, 220 is configured to engage the outer surface of the tube 5 when the connector 100, 200 is connected to the tube 5.

[0525] The connection between the connector 100, 200 and the tube 5 (where the tube 5 is held between the collar 120, 220 and the tube connection portion 110, 210) can assist in holding a tube that undergoes changes in size and / or material properties when exposed to water (which may be due to providing therapy). For example, when exposed to liquid water and / or moisture, the material may increase in size (e.g., by swelling or otherwise expanding) and / or may become softer and more easily deformed (e.g., due to applied forces). This may present problems with pneumatic leakage and / or disconnection of the tube and connector. As discussed above, the water-absorbing material may be one of these material types, as described in more detail elsewhere in this specification.

[0526] The type of connection in which the tube 5 is held between the collar 120, 220 and the tube connecting portion 110, 210 (and optionally with one or more additional attachment and / or sealing features as described below) can allow material changes to occur without breaking the connection while the tube 5 is held by being compressed by the collar 120, 220 and the tube connecting portion 110, 210.

[0527] like Fig. 9 and Fig.12 As shown, the inner surface of the collar 120 , 220 includes retention features 115 , 215 configured to engage the outer surface of the tube 5 to assist in retaining the tube 5 to the connector 100 , 200 .

[0528] The connector 100 , 200 and / or the ferrule 120 , 220 include at least one attachment feature configured to retain the ferrule 120 , 220 to the connector 100 , 200 .

[0529] In some configurations, the at least one attachment feature can include at least one attachment protrusion 126 , 226 .

[0530] In some configurations, the at least one attachment feature includes an attachment protrusion 126 , 226 configured to engage a complementary recess 127 , 227 .

[0531] In some configurations, the attachment protrusion 126, 226 is located on one of the connector 100, 200 or the collar 120, 220, and the recess is located on the other of the connector or collar. Fig. 9 and Fig.12 As shown, the attachment tabs 126 , 226 are located on the connector and the recesses 127 , 227 are located on the collars 120 , 220 .

[0532] In some configurations, the tube connecting portion 110 , 210 of the connector 100 , 200 can include an attachment feature (eg, an attachment protrusion 126 , 226 or a recess 127 , 227 ).

[0533] like Figure 7 , Fig.10 and Fig.13 As shown, the collar 120 , 220 is configured to engage an outer surface of the cuff region 40 , 240 when the connector 100 , 200 is connected to the tube 5 .

[0534] The cuff region 40 , 240 of the tube 5 is held between the collar 120 , 220 and the tube connecting portion 110 , 210 .

[0535] In some configurations, the tube connection portion 110, 210 of the connector 100, 200 may include a retention feature 115, 215. Figures 9 and 10 and Figure 12 to Figure 13 As shown, the retention features 115 , 215 may be configured to assist in retaining the tube 5 on the connector 100 , 200 .

[0536] In some configurations, the retention features 115, 215 can be configured to engage with an inner surface of the tube 5. In some configurations, the retention features 115, 215 can be configured to engage with an inner surface of the cuff region 40.

[0537] The retaining features 115 , 215 may help retain the tube 5 on the tube connecting portion 110 , 210 .

[0538] In some configurations, the retention feature 115, 215 may include at least one retention protrusion. The at least one retention protrusion may be configured to extend circumferentially at least partially around the tube connection portion 110, 210. Figures 9 and 10 and Figure 12 to Figure 13As shown, the at least one retaining projection is configured to extend around the outer surface of the tube connecting portion. In some configurations, the retaining feature 115, 215 can include a helical retaining projection.

[0539] In some configurations, the tube connecting portion 110 and the retaining feature 115 of the connector 100 can form barbs.

[0540] The retaining feature 115, 215 comprises a ramp. The height of the ramp increases in a direction away from the end of the tube connection part 110, 210 configured to engage the tube. The ramp can provide a simple way to push the tube 5 onto the tube connection part 110, 210 during assembly. The ramp can include a descending portion 128 (e.g. Fig. 9 and Fig.10 ), the descending portion 128 provides resistance to removing the tube 5 when the tube 5 is connected. The descending portion 128 can assist in keeping the tube 5 on the connector 100, 200.

[0541] In some configurations, the connection between the tube and the tube connection portion 110, 210 may be a permanent connection. A permanent connection may be, for example, a connection that cannot be disconnected without damaging the tube assembly.

[0542] In some configurations, the tube connection portion 110 , 210 and / or the collar 120 , 220 can include a sealing feature. The sealing feature can be configured to provide a pneumatic seal between the collar 120 and the tube connection portion 110 .

[0543] In some configurations, the sealing feature may include at least one sealing protrusion 131, 231. For example Figures 9 and 10 and Figure 12 to Figure 13 As shown, the at least one sealing protrusion 131, 231 can be disposed on the pipe connection portion 110, 210. In some configurations, the at least one sealing protrusion 131, 231 can be configured to extend at least partially around the pipe connection portion 110, 210 circumferentially. In some configurations, the at least one sealing protrusion is configured to extend around the outer surface of the pipe connection portion. By way of further example, the at least one sealing protrusion 131, 231 can be additionally or alternatively disposed on the collar 120, 220 and extend toward the pipe connection portion 110, 210. In some configurations, the at least one sealing protrusion 131, 231 can be configured to extend at least partially around the collar 120, 220 circumferentially.

[0544] In some configurations, for example Fig.13 As shown, the sealing feature can be located between the retention feature 115, 215 and the at least one attachment feature (eg, the attachment protrusion 126, 226 or the recess 127, 227).

[0545] The sealing feature may be positioned closer to the attachment feature than the retaining feature.

[0546] As described above, the tube 5 may include a water-absorbing material. When humidified gas is provided through the tube 5, the water-absorbing material of the tube 5 may absorb condensate and / or water vapor from the gas. The water-absorbing material increases in size when absorbing water, which may cause the size of the tube 5 and / or a portion of the tube 5 to increase. The increase in the size of the tube when the tube 5 absorbs water may cause leakage at the interface between the tube 5 and the connector 100, 200. This may be caused by the introduction of a gas leakage path between the connector 100, 200 and the tube 5 due to the change in the diameter of the tube 5. A connection type including a tube connection portion 110, 210 configured to be arranged inside the tube 5 when the connector 100, 200 is connected to the tube 5 and a collar 120, 220 configured to engage the outer surface of the tube 5 when the connector 100, 200 is connected to the tube 5 can reduce the chance of gas leakage because the tube 5 is held between the tube connection portion 110, 210 and the collar 120, 220, and the expansion of the tube 5 does not cause the generation of a leakage path.

[0547] The water absorbing material may also become softer as it absorbs water, which may make it more difficult for the connector to hold the tube 5 as it will deform more easily. Holding the tube between the collar 120, 220 and the tube connecting portion 110, 210 can help reduce the risk of the tube 5 becoming disconnected when it softens.

[0548] The tube (and eg the tube wall) may be at least partially formed from a water absorbing material.

[0549] In some configurations, the wall of the tube is at least partially formed from a gas permeable material.

[0550] In some configurations, the wall of the tube is formed entirely of a gas permeable material.

[0551] The water-absorbent material may be a breathable material.

[0552] "Breathable material" refers to a non-porous permeable material that allows water molecules to pass through the integral wall of the permeable material via a solution-diffusion mechanism, but does not allow liquid water to pass through the wall in any significant amount or respiratory gases to flow through the wall in any significant amount. It will be understood by those skilled in the art that the water molecules in the wall are dispersed in the medium in molecular form and therefore have no state (solid, liquid or gaseous), although they are sometimes referred to as vapor in the art (e.g., the transmission rate is often referred to as the moisture vapor transmission rate (MVTR) or the like). It will also be understood that the integral wall does not contain open passages or pores from one major surface to another major surface, so that pathogens can pass through such passages along with air or liquid water droplets through a pore flow mechanism. However, this definition is not intended to exclude tubes formed from such breathable materials, which may have one or more holes set through the material, such as may be caused by, for example, a manufacturing defect, which may produce a negligible pore flow that does not have a substantial impact on the overall performance of the tube and compliance with ISO 5367:2014. It will be further understood that, like all polymers, some small molecule transmission of respiratory gases (e.g., oxygen, carbon dioxide, nitrogen, or helium) may occur in trace or insignificant amounts (i.e., not a "bulk" flow), which for breathable materials as defined herein will typically occur at a rate that is at least an order of magnitude lower than that of water molecules. Furthermore, of particular relevance to respiratory gases delivered to or from a patient, the amount of such small molecule transmission of respiratory gases will be less than that allowed for compliance with relevant standards, such as the leak test in Section 5.4 of ISO 5367:2014 (which is hereby incorporated by reference in its entirety), which is tested via the method set forth in Appendix E.

[0553] Figures 4 to 7 An example of a medical tube assembly 1 having a first connector 100 and a second connector 200 is shown.

[0554] The first connector 100 is configured to be connected to the first end 10 of the tube 5 .

[0555] The first connector 100 includes a gas passage defined by a tube connection portion 110. The tube connection portion 110 is configured to engage with a first end of a tube.

[0556] The first connector 100 further includes a second portion of the gas channel defined by a second portion of the first connector 100 .

[0557] In some configurations, for example Fig.14 As shown, the second portion of the first connector 100 may be an associated connector portion 70 configured to engage with a first associated connector. Fig.14As shown, the second portion may be an intermediate portion 183 between the tube connection portion 110 of the first connector and an associated connector portion 70 that is configured to engage with a first associated connector (eg, a device connector).

[0558] like Fig.14 As shown, the first connector 100 includes an intermediate portion 183 located between the tube connection portion 110 of the first connector 100 and the associated connector portion 70, which is configured to engage with the first associated connector.

[0559] The second connector 200 includes a gas passage defined by a tube connection portion 210. The tube connection portion 210 is configured to engage with a second end of a tube.

[0560] The second connector 200 also includes a second portion of the gas channel defined by a second portion of the second connector 200 .

[0561] In some configurations, the second portion of the second connector 200 may be an associated connector connection portion 270 configured to engage with a second associated connector 300 (eg, as shown in FIG. 2 ). Figure 23 to Figure 24 Alternatively, the second portion may be an intermediate portion 183 located between the tube connection portion 110 of the second connector and an associated connector portion 270 configured to engage with the second associated connector.

[0562] As described above, the tube 5 has a gas passage having a cross-sectional area. Also as described above, the tube can have a body portion having a gas passage. In some configurations, the body portion of the tube defines the entire tube (e.g., where the tube does not include the cuff region 40, 240 and / or any increasing diameter portion).

[0563] The medical tube assembly 1 may define a gas passage. The gas passage of the medical tube assembly may be defined by at least the following: a first connector 100 , a tube 5 , and a second connector 200 .

[0564] Fig.14 The diameters of different parts of the gas flow channel are shown. Figures 15 to 19 The cross-sectional areas of different parts of the gas flow channel are shown.

[0565] As discussed above, the cross-sectional area of ​​the gas passage may be defined at least in part by the diameter of the gas passage.

[0566] Fig.14 By way of example, the cross-sectional diameter of the gas channel is shown as the minimum diameter defined by the minimum diameter of the gas channel. Fig.14The embodiment shown has a circular gas passage, so the minimum cross-sectional area of ​​the gas passage is based on the minimum diameter of the gas passage, and when describing Fig.14 In the example shown, the term "cross-sectional area" is used. However, considering the relationship between the cross-sectional area and the diameter of this example, the term "cross-sectional area" can be used interchangeably with the term "diameter".

[0567] It will be appreciated that in other examples the diameter and / or cross-sectional area of ​​the gas passage may be defined by, for example, a maximum diameter and / or cross-sectional area of ​​the gas passage along the length of the tube, or a nominal diameter and / or cross-sectional area of ​​the gas passage along the length of the tube.

[0568] As described in more detail above, the tube 5 may include a first increasing gas passage cross-sectional area portion 35 located at or near the first end 10 of the tube 5 and extending from the main body portion 30, and / or a second increasing gas passage cross-sectional area portion 235 located at or near the second end 20 of the tube 5 and extending from the main body portion 30.

[0569] Referring to the first connector 100, as Fig.14 As shown, in the direction toward the first end 10 of the tube 5, the gas channel cross-sectional area of ​​the gas channel of the medical tube assembly 1 increases from the end of the main body portion 30 closest to the first gradually increasing gas channel cross-sectional area portion through the first gradually increasing gas channel cross-sectional area portion 35.

[0570] In the direction toward the first end 10 of the tube 5 , the gas channel cross-sectional area of ​​the gas channel of the medical tube assembly 1 defined by the minimum cross-sectional area of ​​the gas channel decreases from the first increasing gas channel cross-sectional area portion 35 to the tube connecting portion 110 of the first connector 100 .

[0571] In a direction toward the first end 10 of the tube, a gas passage cross-sectional area of ​​the gas passage of the medical tube assembly 1 increases from the tube connecting portion 110 of the first connector 100 to the second portion of the first connector 100 .

[0572] In some examples, the direction towards the first end 10 of the tube 5 is from the main body 30 of the tube 5 towards the first end 10 of the tube 5 .

[0573] In some configurations, the cross-sectional area of ​​the gas passageway of the main body portion of the tube can be defined as described elsewhere in this specification.

[0574] In some configurations, the cross-sectional area of ​​the gas passage of increasing gas passage cross-sectional area can be defined as described elsewhere in this specification.

[0575] Referring to the first connector 100, as Fig.14As shown, the cross-sectional area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion 35 defined by the local minimum cross-sectional area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion (and optionally any one or all of the local minimum cross-sectional areas) (and optionally the minimum local cross-sectional area of ​​the gas channel at the end of the first gradually increasing gas channel cross-sectional area portion facing away from the main body portion) is greater than the minimum cross-sectional area of ​​the gas channel of the tube connecting portion 110 of the first connector 100.

[0576] The minimum cross-sectional area of ​​the gas passage of the second portion of the first connector 100 (eg, the associated connector portion 70 or the intermediate portion 181 ) is greater than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion 110 of the first connector 100 .

[0577] Fig.14 It is shown that the minimum diameter 7 (also the minimum local diameter) of the gas flow path of the tube is larger than the minimum diameter 111 of the gas passage of the tube connection part 110. Fig.14 In the example of FIG. 4 , the diameter 41 of the cuff region 40 of the tube is additionally larger than the smallest diameter 111 of the gas passage of the tube connecting portion 110 .

[0578] Fig.14 It is also shown that the minimum diameter 111 of the gas channel of the tube connecting part 110 is smaller than the minimum diameter of the gas channel of the second part of the first connector (the minimum diameter is one or both of the minimum diameter 181 of the gas channel of the middle part 183 and the minimum diameter 71 of the gas channel of the associated connector part 271).

[0579] Now referring to the second connector 200, in the direction toward the second end 20 of the tube 5, the gas channel cross-sectional area of ​​the gas channel of the medical tube assembly 1 increases from the end of the main body portion 30 closest to the second progressively increasing gas channel cross-sectional area portion through the second progressively increasing gas channel cross-sectional area portion 235.

[0580] In the direction toward the second end 20 of the tube 5 , the gas passage cross-sectional area of ​​the gas passage of the medical tube assembly 1 decreases from the second increasing gas passage cross-sectional area portion 235 to the tube connecting portion 210 of the second connector 200 .

[0581] In the direction toward the second end 20 of the tube 5 , the gas passage cross-sectional area of ​​the gas passage of the medical tube assembly 1 increases from the tube connecting portion 210 of the second connector 200 to the second portion of the second connector 200 .

[0582] In some examples, the direction towards the second end 20 of the tube 5 is from the main body 30 of the tube 5 towards the second end 20 of the tube 5 .

[0583] The cross-sectional area of ​​the gas channel of the second increasing gas channel cross-sectional area portion, which in this example is defined by the local minimum cross-sectional area of ​​the gas channel of the second increasing gas channel cross-sectional area portion (and optionally the local minimum cross-sectional area of ​​the gas channel of the end of the second increasing gas channel cross-sectional area portion facing away from the main body portion) is larger than the minimum cross-sectional area of ​​the gas channel of the tube connection portion 210 of the second connector. It will be appreciated that all local minimum cross-sectional areas of the gas channel of the second increasing gas channel cross-sectional area portion may be larger than the minimum cross-sectional area of ​​the gas channel of the tube connection portion 210 of the second connector.

[0584] The minimum cross-sectional area of ​​the gas passage of the second portion of the second connector 200 is greater than the minimum cross-sectional area of ​​the gas passage of the tube connection portion 210 of the second connector 200. This can be referred to, for example, Fig.14 Shown where the tube is circular, the figure does not show the area, but the diameter is proportional to the area.

[0585] Fig.14 It is shown that the diameter 241 of the gas flow path of the tube (and in this example the cuff region 240 of the tube) is larger than the smallest inner diameter 211 of the tube connection portion 210 .

[0586] Fig.14 It is also shown that the minimum diameter 211 of the gas passage of the tube connection part 210 is smaller than the minimum diameter of the gas passage of the second part of the second connector 200 (which is the diameter 271 of the associated connector part 270 of the second connector 200).

[0587] The associated connectors 300 (eg, as a first associated connector and a second associated connector) may be the same type of connector or connectors of different types from each other.

[0588] In some configurations, the first associated connector and the second associated connector can be part of one or more tube assemblies or devices (e.g., a humidifier, a flow generator, and / or a ventilator). For example, the first associated connector can be part of a ventilator, and the second associated connector can be connected to a Y-piece and / or a patient interface.

[0589] The first associated connector and the second associated connector may include tapered fittings for connecting with the first connector 100 and the second connector 200, respectively.

[0590] Fig.15 Different examples of cross sections of the corrugated tube 5 are shown together with the associated cross sections.

[0591] Fig.16 and Fig.17The cross-sectional area shown is shown in the corrugated portion of the tube, and an example cross-sectional area of ​​the tube is shown. However, it will be appreciated that in some configurations, the cross-sectional area of ​​the bellows and / or the incremental gas passage cross-sectional area portion 35, 25 can be defined in a variety of ways (as described in more detail above).

[0592] Fig.16 and Fig.17 The gas passage cross-sectional area is shown, which is the minimum cross-sectional area defined by the inner surface of the trough of the tube 5.

[0593] Fig.16 A cross section of the main portion 30 of the tube 5 is shown, the cross section defining a cross-sectional area 31 of the main portion of the tube.

[0594] Fig.17 A cross section of the increasing gas passage cross-sectional area portion 35 of the tube is shown. Fig.17 The cross section is regarded as the minimum cross-sectional area 36 of the gas passage at its increasing position towards the first end 10 of the tube 5. The cross-sectional area of ​​the gas passage can be, for example, Fig. 20 The pattern shown continues to increase.

[0595] Fig.18 A cross section of the tube connecting portion 110 of the first connector 100 is shown. Fig.18 The cross-sectional area 77 of the tube connecting portion 110 of the first connector 100 is shown.

[0596] Fig.19 A cross section of the cuff region 40 of the first connector 100 is shown. Fig.19 The cross-sectional area 78 of the cuff region 40 of the first connector 100 is shown.

[0597] Reference now Fig.23 and Fig.24 In some configurations, the cross-sectional area of ​​the gas passage of the medical tube assembly, defined by the minimum cross-sectional area of ​​the gas passage along the length of the tube, is equal to or greater than the minimum cross-sectional area of ​​the gas passage of the opening of the associated connector 300. This ensures that the medical tube assembly does not provide any local flow restriction to increase the overall flow resistance of the breathing circuit.

[0598] exist Fig.23 and Fig.24 In some examples, the associated connector 300 is configured to engage with (and optionally seal with) an inner surface of the connector 200 (e.g., the associated connector portion 270 of the connector 200). Additionally or alternatively, in some examples, the associated connector 300 may be configured to engage with (and optionally seal with) an outer surface of the connector 200 (e.g., the associated connector portion 270 of the connector 200).

[0599] The cross-sectional area of ​​the gas passage of an opening may be the minimum internal cross-sectional area of ​​the opening.

[0600] The cross-sectional area of ​​the gas passage of the tube (which cross-sectional area is defined in this example by the minimum cross-sectional area of ​​the gas passage along the length of the main portion of the tube) is equal to or greater than the cross-sectional area of ​​the gas passage of the opening of the associated connector 300. Fig.23 As shown, the minimum diameter of the gas passage of the tube (which in this example is defined by the minimum cross-sectional area of ​​the gas passage along the length of the main body portion of the tube) is equal to or greater than the diameter of the gas passage of the opening of the associated connector 300.

[0601] The minimum cross-sectional area of ​​the gas passage of the connector 200 is equal to or greater than the cross-sectional area of ​​the gas passage of the opening of the associated connector 300 .

[0602] like Fig.23 As shown, the minimum diameter 211 of the gas passage of the connector 200 is equal to or greater than the diameter 212 of the gas passage of the opening of the associated connector 300. When the cross-sectional area is defined by the diameter, the minimum cross-sectional area of ​​the gas passage of the connector 100 and the minimum diameter of the cross-sectional area of ​​the tube 5 can be equal to or greater than the diameter of the gas passage of the opening of the associated connector 300.

[0603] In some configurations, the second connector 200 can be configured to connect to a second associated connector 300. In these configurations, one or more of the following:

[0604] The cross-sectional area of ​​the gas passage in the main part of the tube,

[0605] the minimum cross-sectional area of ​​the gas passage of the first connector, and

[0606] The minimum cross-sectional area of ​​the gas channel of the second connector,

[0607] Equal to or greater than the cross-sectional area of ​​the opening of the second associated connector.

[0608] The cross-sectional area of ​​the gas passage of the main body portion 30 of the tube may be defined as described above. In some configurations, the main body portion 30 may be the entire tube (eg, the tube may not have a portion with increasing gas passage cross-sectional area).

[0609] It will be appreciated that the above Fig.23 The description may apply equally to connector 100 itself, connector 200 itself, or both connector 100 and connector 200.

[0610] The minimum diameter 111 of the gas passage of the tube connection portion 110 of the first connector 100 may be about 10 mm to about 16 mm, or about 12 mm to about 14 mm, or about 13 mm.

[0611] The minimum cross-sectional area of ​​the gas passage of the tube connection portion 110 of the first connector 100 may be about 100 mm 2 To about 150mm 2 , or about 120mm 2 To about 140mm 2 , or about 130mm 2 .

[0612] The minimum diameter 181 of the gas passage of the middle portion 183 of the first connector 100 may be about 10 mm to about 16 mm, or about 12 mm to about 14 mm, or about 13.5 mm.

[0613] The minimum cross-sectional area of ​​the gas passage of the middle portion 183 of the first connector 100 may be about 120 mm 2 To about 170mm 2 , or about 130mm 2 To about 150mm 2 , or about 143mm 2 .

[0614] The minimum diameter 71 of the gas passage of the associated connector portion 71 of the first connector 100 may be about 20 mm to about 25 mm, or about 20 mm to about 23 mm, or about 22.3 mm.

[0615] The minimum cross-sectional area of ​​the gas passage of the associated connector part 71 of the first connector 100 may be about 350 mm 2 To about 450mm 2 , or about 380mm 2 To about 400mm 2 , or about 393mm 2 .

[0616] The minimum inner diameter 211 of the tube connecting portion 210 of the second connector 200 may be about 10 mm to about 16 mm, or about 11 mm to about 15 mm, or about 12.65 mm.

[0617] The minimum inner diameter 211 of the tube connection portion 210 of the second connector 200 may be about 100 mm. 2 To about 150mm 2 , or about 115mm 2 To about 135mm 2 , or about 125mm 2 .

[0618] The minimum diameter 71 of the gas passage of the associated connector portion 271 of the second connector 200 may be about 10 mm to about 20 mm, or about 14 mm to about 16 mm, or about 15.5 mm.

[0619] The minimum diameter 71 of the gas passage of the associated connector portion 271 of the second connector 200 may be about 120 mm 2 To about 230mm 2 , or about 180mm 2 About 200mm 2 , or about 187mm 2 .

[0620] Although the embodiments have been described with reference to a number of illustrative embodiments, it will be appreciated by those skilled in the art that various changes may be made to form and detail without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the preferred embodiments should be considered only in a descriptive sense rather than for limiting purposes, and the technical scope of the invention is not limited to the embodiments. In addition, the present invention is not limited by the detailed description of the invention, but by the appended claims, and all differences within the scope will be interpreted as being included in the present disclosure.

[0621] Where in the foregoing description reference is made to elements or integers having known equivalents, such equivalents are included as if they were individually set forth.

[0622] Numerous modifications will be apparent to those skilled in the art without departing from the scope of the invention as herein described with reference to the accompanying drawings.

Claims

1. A medical tube assembly, comprising: a tube defining a gas passage extending from a first end of the tube to a second end of the tube, and wherein the tube comprises a water absorbing material, and a connector defining a gas passage extending therethrough, the connector being configured to be connected to the first end of the tube, The tube includes a main body portion and a gradually increasing gas passage cross-sectional area portion, wherein the gradually increasing gas passage cross-sectional area portion is at or near a first end of the tube and extends from the main body portion.

2. The medical tube assembly according to claim 1, wherein: The connector includes a tube connection portion that is disposed inside the tube when the connector is connected to the tube.

3. The medical tube assembly according to claim 2, wherein: The medical tube assembly includes a collar, wherein the collar is configured to engage an outer surface of the tube when the connector is connected to the tube.

4. The medical tube assembly according to claim 3, wherein: The tube is held between the collar and the tube connecting portion.

5. The medical tube assembly according to claim 3 or 4, wherein: The cuff region of the tube is held between the collar and the tube connecting portion.

6. A medical tube assembly, comprising: a tube defining a gas passage extending from a first end of the tube to a second end of the tube, a connector defining a gas passage extending therethrough, the connector being configured to be connected to the first end of the tube, wherein the connector includes a tube connection portion configured to be disposed inside the tube when the connector is connected to the tube, and a collar, wherein the collar is configured to engage an outer surface of the tube when the connector is connected to the tube, and wherein the tube is held between the collar and the tube connection portion, and The tube includes a main body portion and a gradually increasing gas passage cross-sectional area portion, wherein the gradually increasing gas passage cross-sectional area portion is located at or near the first end of the tube and extends from the main body portion.

7. The medical tube assembly according to claim 6, wherein: The tube includes a water absorbing material.

8. The medical tube assembly according to any one of claims 1 to 7, wherein: The tube is at least partially a bellows.

9. The medical tube assembly according to any one of claims 1 to 7, wherein: The main body portion of the tube is corrugated.

10. The medical tube assembly according to claim 9, wherein: The ripples consist of alternating peaks and troughs.

11. The medical tube assembly according to any one of claims 1 to 10, wherein: The gas passage cross-sectional area of ​​the main body of the tube is defined by: a) the minimum cross-sectional area of ​​the gas passageway in the main body of the tube, or b) the maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

12. The medical tube assembly according to any one of claims 1 to 11, wherein: The gas passage cross-sectional area of ​​the main body of the tube is defined by: a) the local minimum cross-sectional area of ​​the gas passage in the main body of the tube, or b) the local maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

13. The medical tube assembly according to claim 12, wherein: One or more of the following: a local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, a local maximum cross-sectional area of ​​the gas passage of the main portion of the tube, and / or a local nominal cross-sectional area of ​​the gas passage of the main portion of the tube, which is constant along the length of the main portion of the tube.

14. The medical tube assembly according to any one of claims 1 to 13, wherein: The gas passage diameter of the main body of the tube is defined by: a) the minimum diameter of the gas passageway in the main body of the tube, or b) the maximum diameter of the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional diameter, the nominal cross-sectional diameter being the average of the smallest diameter of the gas passages of the main body of the tube and the largest diameter of the gas passages of the main body of the tube.

15. The medical tube assembly according to any one of claims 1 to 14, wherein: The gas passage diameter of the main body of the tube is defined by: a) the local minimum internal diameter of the gas passageway of the main body of the tube, or b) the local maximum internal diameter of the gas passageway of the main body of the tube, or c) when the tube is corrugated, a local nominal diameter of the gas passage diameter, the local nominal diameter being the average of the diameter between opposing troughs of the tube and the diameter between opposing peaks of the tube adjacent to the troughs.

16. The medical tube assembly according to claim 12 or 15, wherein: One or more of the following: a local minimum inner diameter of the gas passage of the main body of the tube, a local maximum inner diameter of the gas passage of the main body of the tube, and / or a local nominal diameter of the gas passage of the main body of the tube, is constant along the length of the main body of the tube.

17. The medical tube assembly according to any one of claims 1 to 16, wherein: The medical tube assembly includes at least one heating wire.

18. The medical tube assembly according to claim 17, wherein: The at least one heating wire is located in the wall of the tube, around the tube, or in the gas channel of the tube and / or in the gas channel of the connector.

19. The medical tube assembly according to claim 17 or 18, wherein: The medical tube assembly comprises an electrical connector configured to allow electrical connection to the at least one heater wire.

20. The medical tube assembly according to any one of claims 1 to 19, wherein: The connector forms an elbow.

21. The medical tube assembly according to any one of claims 1 to 19, wherein: The connector is a straight connector.

22. The medical tube assembly according to any one of claims 1 to 21, wherein: The increasing gas passage cross-sectional area portion comprises an increase in gas passage cross-sectional area in a direction towards the first end of the tube and / or towards a cuff region of the first end of the tube.

23. The medical tube assembly of claim 22, wherein: The increase in the gas passage cross-sectional area in a direction towards the first end of the tube and / or towards the cuff region of the first end of the tube is linear along the length of the increasing gas passage cross-sectional area portion.

24. The medical tube assembly according to any one of claims 1 to 22, wherein: The increasing gas passage cross-sectional area portion includes a step-wise increase in the gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

25. The medical tube assembly according to any one of claims 1 to 24, wherein: The increasing gas passage cross-sectional area portion of the tube includes a cross-sectional area of ​​the gas passage of the tube that increases in a direction from a main body portion of the tube toward a first end of the tube.

26. The medical tube assembly according to any one of claims 1 to 25, wherein: The gas passage of the tube in the increasing gas passage cross-sectional area portion is defined at least by a diameter of the gas passage of the tube in the increasing gas passage cross-sectional area portion.

27. The medical tube assembly according to any one of claims 1 to 26, wherein: The gradually increasing gas passage cross-sectional area portion has a gradually increasing diameter.

28. The medical tube assembly of claim 27, wherein: The increasing gas passage cross-sectional area portion includes an increase in gas passage diameter in a direction toward the first end of the tube and / or toward a cuff region of the first end of the tube.

29. The medical tube assembly of claim 28, wherein: The increase in the gas passage diameter in a direction towards the first end of the tube and / or towards the cuff region of the first end of the tube is linear along the length of the increasing gas passage cross-sectional area portion.

30. The medical tube assembly of claim 28, wherein: The increasing gas passage cross-sectional area portion includes a step-wise increase in the diameter of the gas passage in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

31. The medical tube assembly according to any one of claims 1 to 30, wherein: The increasing gas passage cross-sectional area portion extends from a first location remote from the first end of the tube to a location at or near the first end of the tube.

32. The medical tube assembly according to any one of claims 1 to 31, wherein: The increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the first end.

33. The medical tube assembly according to any one of claims 1 to 32, wherein: The increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward a cuff region of the first end.

34. The medical tube assembly according to any one of claims 1 to 33, wherein: The increasing gas passage cross-sectional area portion of the tube is corrugated.

35. The medical tube assembly of claim 34, wherein: The cross-sectional area of ​​the increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, and the local nominal cross-sectional area is the average of an area of ​​the gas channel of the increasing gas channel cross-sectional area portion defined by a trough of the increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the increasing gas channel cross-sectional area portion defined by a peak of the increasing gas channel cross-sectional area portion adjacent to the trough.

36. The medical tube assembly according to any one of claims 22 to 35, wherein: The cross-sectional area of ​​the increasing gas passage cross-sectional area portion of the tube is defined by: a) the local minimum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion, or b) The local maximum cross-sectional area of ​​the gas channel in the portion of the gradually increasing cross-sectional area of ​​the gas channel.

37. The medical tube assembly of claim 36, wherein: The increasing gas passage cross-sectional area is partially defined by a plurality of corrugations.

38. The medical tubing assembly of claim 37, wherein: The number of corrugations is from about 1 to about 10 corrugations, or from about 2 to about 7 corrugations, or from about 2 to about 5 corrugations, or from about 2 to about 2.5 corrugations, or about 2 corrugations.

39. The medical tube assembly according to any one of claims 1 to 28, wherein: When the tube is connected to the connector, the end of the increasing gas passage cross-sectional area portion is located at the end of the tube connecting portion.

40. The medical tube assembly according to any one of claims 1 to 39, wherein: The gradually increasing gas passage cross-sectional area portion is a trumpet-shaped portion.

41. The medical tube assembly according to any one of claims 1 to 40, wherein: The tube includes a cuff region located at or near a first end of the tube.

42. The medical tube assembly of claim 41, wherein: The cuff region extends from the increasing gas passage cross-sectional area portion.

43. The medical tube assembly according to claim 41 or 42, wherein: The cuff region extends toward the first end of the tube.

44. The medical tube assembly according to any one of claims 41 to 43, wherein The cuff region of the first end of the tube is configured to engage the tube connecting portion of the connector.

45. The medical tube assembly according to any one of claims 41 to 44, wherein: The cuff region includes at least one rib.

46. ​​The medical tube assembly according to any one of claims 41 to 45, wherein: The cuff region includes at least one rib oriented parallel or at least partially parallel to the longitudinal axis of the tube.

47. The medical tube assembly according to any one of claims 41 to 45, wherein: The cuff region includes at least one rib extending longitudinally along the tube.

48. The medical tube assembly according to any one of claims 45 to 47, wherein The at least one rib is configured to engage with a retention feature of a collar of the medical tube assembly and / or a retention feature of a tube connecting portion of the connector.

49. The medical tube assembly according to any one of claims 41 to 48, wherein The cuff region has an internal cross-sectional area that is larger than the gas passage cross-sectional area of ​​the main body portion of the tube.

50. The medical tube assembly according to any one of claims 41 to 49, wherein: The cuff region has an inner diameter that is larger than the gas passage diameter of the main body portion of the tube.

51. The medical tube assembly according to any one of claims 41 to 50, wherein: The cuff region is non-corrugated.

52. The medical tube assembly according to any one of claims 1 to 51, wherein: The wall of the tube is at least partially formed from a gas permeable material.

53. The medical tube assembly according to any one of claims 1 to 52, wherein: The wall of the tube is formed entirely of gas permeable material.

54. The medical tube assembly according to any one of claims 1 to 53, wherein: The water-absorbing material of the tube is a breathable material.

55. The medical tube assembly according to any one of claims 1 to 54, wherein: The collar is configured to engage an outer surface of the connector when the connector is connected to the tube.

56. The medical tube assembly according to any one of claims 1 to 55, wherein: The inner surface of the collar includes a retention feature configured to engage an outer surface of the tube to assist in retaining the tube on the connector.

57. The medical tube assembly of claim 56, wherein: The connector and / or the collar include at least one attachment feature configured to retain the collar to the connector.

58. The medical tubing assembly of claim 57, wherein: The at least one attachment feature includes at least one attachment tab.

59. The medical tube assembly according to claim 57 or 58, wherein: The at least one attachment feature includes an attachment protrusion configured to engage a complementary recess.

60. The medical tube assembly of claim 59, wherein: The attachment protrusion is located on one of the connector or the collar, and the recess is located on the other of the connector or the collar.

61. The medical tube assembly according to any one of claims 1 to 60, wherein: The collar is configured to engage an outer surface of the cuff region when the connector is connected to the tube.

62. The medical tube assembly of claim 61, wherein: The cuff region of the tube is held between the collar and the tube connecting portion.

63. The medical tube assembly according to any one of claims 1 to 62, wherein: The tube connecting portion of the connector includes a retention feature configured to engage an inner surface of the tube to assist in retaining the tube on the connector.

64. The medical tube assembly of claim 63, wherein: The tube connecting portion of the connector includes a retention feature configured to engage an inner surface of a cuff region to assist in retaining the tube on the connector.

65. The medical tube assembly of claim 64, wherein: The retention feature includes at least one retention tab.

66. The medical tube assembly of claim 65, wherein: The at least one retaining projection is configured to extend at least partially circumferentially around the tube connecting portion.

67. The medical tube assembly of claim 65 or 66, wherein: The at least one retaining projection is configured to extend around an outer surface of the tube connecting portion.

68. The medical tube assembly according to any one of claims 63 to 67, wherein: The retention feature includes a helical retention tab.

69. The medical tube assembly according to any one of claims 63 to 68, wherein The tube connecting portion of the connector and the retaining features of the tube connecting portion of the connector form barbs.

70. The medical tube assembly according to any one of claims 1 to 69, wherein: The tube connection portion and / or the collar include a sealing feature configured to provide a pneumatic seal between the collar and the tube connection portion.

71. The medical tube assembly of claim 70, wherein: The sealing feature includes at least one sealing protrusion.

72. The medical tube assembly of claim 71, wherein: The at least one sealing protrusion is configured to extend circumferentially at least partially around the tube connecting portion.

73. The medical tube assembly of claim 71 or 72, wherein: The at least one sealing protrusion is configured to extend around an outer surface of the tube connecting portion.

74. The medical tube assembly according to any one of claims 70 to 73, wherein The sealing feature is located between the retaining feature and the attaching feature.

75. The medical tube assembly according to any one of claims 1 to 74, wherein: The medical tube assembly includes a second connector connectable to a second end of the tube.

76. The medical tube assembly according to any one of claims 1 to 75, wherein: The second connector comprises any of the features of a connector as defined in any of the preceding claims.

77. The medical tube assembly of claim 75 or 76, wherein: The tube includes a second increasing gas passage cross-sectional area portion located at or near a second end of the tube and extending from the body portion.

78. The medical tube assembly of claim 77, wherein: The second increasing gas passage cross-sectional area portion comprises an increase in gas passage cross-sectional area in a direction towards the second end of the tube and / or towards a cuff region of the second end of the tube.

79. The medical tube assembly of claim 78, wherein: The increase in the gas passage cross-sectional area in a direction towards the second end of the tube and / or towards the cuff region of the second end of the tube is linear along the length of the second increasing gas passage cross-sectional area portion.

80. The medical tube assembly according to any one of claims 77 to 79, wherein: The second increasing gas passage cross-sectional area portion includes a step-wise increase in the gas passage cross-sectional area in a direction toward the first end of the tube and / or toward the cuff region of the first end of the tube.

81. The medical tube assembly of any one of claims 77 to 80, wherein: The second increasing gas passage cross-sectional area portion of the tube includes a cross-sectional area of ​​the gas passage of the tube that increases in a direction from the main body portion of the tube toward the second end of the tube.

82. The medical tube assembly of any one of claims 77 to 81, wherein: The second increasing gas passage cross-sectional area portion is defined by at least a diameter of the gas passage in the second increasing gas passage cross-sectional area of ​​the tube.

83. The medical tube assembly of any one of claims 77 to 82, wherein: The gradually increasing gas passage cross-sectional area portion has a gradually increasing diameter.

84. The medical tube assembly of claim 83, wherein: The increasing gas passage cross-sectional area portion includes an increase in gas passage diameter in a direction toward the second end of the tube and / or toward a cuff region of the second end of the tube.

85. The medical tube assembly of claim 84, wherein: The increase in the gas passage diameter in a direction towards the second end of the tube and / or towards the cuff region of the second end of the tube is linear along the length of the second increasing gas passage cross-sectional area portion.

86. The medical tube assembly of claim 84, wherein: The second increasing gas passage cross-sectional area portion includes a step-wise increase in the diameter of the gas passage in a direction toward the second end of the tube and / or toward a cuff region of the second end of the tube.

87. The medical tube assembly of any one of claims 77 to 86, wherein: The second increasing gas passage cross-sectional area portion extends from a second location distal from the second end of the tube to a location at or near the second end of the tube.

88. The medical tube assembly of any one of claims 77 to 87, wherein: The second increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward the second end.

89. The medical tube assembly according to any one of claims 77 to 88, wherein: The second increasing gas passage cross-sectional area portion extends from the main body portion of the tube toward a cuff region of the second end.

90. The medical tube assembly according to any one of claims 77 to 89, wherein: The second increasing gas passage cross-sectional area portion of the tube is corrugated.

91. The medical tube assembly of claim 90, wherein: The cross-sectional area of ​​the second gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, and the local nominal cross-sectional area is the average of an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a trough of the second gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a peak of the second gradually increasing gas channel cross-sectional area portion adjacent to the trough.

92. The medical tube assembly of any one of claims 77 to 91, wherein: The increasing gas passage cross-sectional area of ​​the tube is defined in part by: a) the local minimum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion, or b) The local maximum cross-sectional area of ​​the gas channel in the portion of the gradually increasing cross-sectional area of ​​the gas channel.

93. The medical tube assembly of claim 92, wherein: The second gradually increasing gas passage cross-sectional area is partially defined by a plurality of corrugations.

94. The medical tube assembly of claim 93, wherein: The number of corrugations is from about 1 to about 10 corrugations, or from about 2 to about 7 corrugations, or from about 2 to about 5 corrugations, or from about 2 to about 2.5 corrugations, or about 2 corrugations.

95. The medical tube assembly of any one of claims 77 to 94, wherein: When the tube is connected to the second connector, an end of the second increasing gas passage cross-sectional area portion is located at or near a tube connecting portion of the second connector.

96. The medical tube assembly of any one of claims 77 to 95, wherein: The second gradually increasing gas passage cross-sectional area portion is a trumpet-shaped portion.

97. The medical tube assembly according to any one of claims 1 to 96, wherein: The tube includes a second cuff region at or near a second end of the tube.

98. The medical tubing assembly of claim 97, wherein: The cuff region extends from the second increasing gas passage cross-sectional area portion.

99. The medical tube assembly of claim 97 or 98, wherein: The cuff region extends toward the second end of the tube.

100. The medical tube assembly according to any one of claims 97 to 99, wherein: The cuff region of the second end of the tube is configured to engage the tube connecting portion of the connector.

101. The medical tube assembly according to any one of claims 97 to 100, wherein: The cuff region of the second end of the tube includes at least one rib.

102. The medical tube assembly of any one of claims 97 to 101, wherein: The cuff region of the second end of the tube includes at least one rib oriented parallel or at least partially parallel to the longitudinal axis of the tube.

103. The medical tube assembly of any one of claims 97 to 102, wherein: The cuff region includes at least one rib extending longitudinally along the tube.

104. The medical tube assembly according to any one of claims 101 to 103, wherein: The at least one rib is configured to engage with a retention feature of the collar and / or a retention feature of a tube connecting portion of the connector.

105. The medical tube assembly of any one of claims 97 to 104, wherein: The cuff region of the second end of the tube has an internal cross-sectional area that is larger than the gas passage cross-sectional area of ​​the main body portion of the tube.

106. The medical tube assembly of any one of claims 97 to 105, wherein: The cuff region has an inner diameter that is larger than the gas passage diameter of the main body portion of the tube.

107. The medical tube assembly of any one of claims 97 to 106, wherein: The cuff region is non-corrugated.

108. An exhalation passage as an exhalation tube, a filter and a Y-piece, wherein: The expiratory tube is a medical tube assembly according to any one of the preceding claims.

109. An exhalation passage according to claim 108, wherein: For a gas flow of 30 liters / minute, the pressure drop on the exhalation pathway is less than 1.8 cmH2O, or for a gas flow of 15 liters / minute, the pressure drop on the exhalation pathway is less than 1.8 cmH2O, or for a gas flow of 2.5 liters / minute, the pressure drop on the exhalation pathway is less than 1.85 cmH2O.

110. A breathing circuit comprising: The medical tube assembly according to any one of claims 1 to 107, wherein the medical tube assembly is used as an expiratory tube; a drying line configured to extend from a gas source; a humidification chamber or humidifier configured to be connected to the drying line; and an inhalation tube configured to be connected to the humidifier chamber or humidifier and to the Y-piece.

111. The breathing circuit of claim 110, wherein: The pneumatic compliance of the breathing circuit is less than 5 ml / cmH2O at 60 cmH2O.

112. A medical tube assembly, the medical tube assembly comprising: A tube defining a gas passage extending from a first end of the tube to a second end of the tube, and wherein the tube comprises: a main body portion, the main body portion defining a main body portion gas passage, a first increasing gas passage cross-sectional area portion, the first increasing gas passage cross-sectional area portion being located at or near the first end of the tube and extending from the main body portion, the gas passage cross-sectional area of ​​the first increasing gas passage cross-sectional area portion increasing in a direction toward the first end of the tube to a gas passage cross-sectional area at an end of the first increasing gas passage cross-sectional area portion; and a second gradually increasing gas passage cross-sectional area portion, the second gradually increasing gas passage cross-sectional area portion being located at or near the second end of the tube and extending from the main body portion, the gas passage cross-sectional area of ​​the second gradually increasing gas passage cross-sectional area portion increasing in a direction toward the second end of the tube to a gas passage cross-sectional area at an end of the second gradually increasing gas passage cross-sectional area portion, A first connector configured to be connected to a first end of the tube, the first connector defining a gas passage extending through the first connector, the first connector comprising: a tube connecting portion configured to engage with the first end of the tube, the tube connecting portion defining a gas passage, defining a second portion of the gas passage, And among them, a) the cross-sectional area of ​​the gas passage at the end of the first gradually increasing gas passage cross-sectional area portion is larger than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the first connector, b) the minimum cross-sectional area of ​​the gas passage of the second portion of the first connector is larger than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the first connector, and a second connector configured to be connected to the second end of the tube, the second connector defining a gas passage extending through the second connector, the second connector comprising: a tube connecting portion configured to engage with the second end of the tube, the tube connecting portion defining a gas passage, defining a second portion of the gas passage, And among them, a) the cross-sectional area of ​​the gas passage at the end of the second gradually increasing gas passage cross-sectional area portion is larger than the minimum cross-sectional area of ​​the gas passage at the tube connecting portion of the second connector, b) The minimum cross-sectional area of ​​the gas passage of the second portion of the second connector is larger than the minimum cross-sectional area of ​​the gas passage of the tube connecting portion of the second connector.

113. The medical tube assembly of claim 112, wherein: The second portion of the first connector is an associated connector portion configured to engage with a first associated connector.

114. The medical tube assembly of claim 112, wherein: The second portion of the first connector is an intermediate portion between the tube connection portion of the first connector and an associated connector portion configured to engage with a first associated connector.

115. The medical tube assembly of claim 113 or 114, wherein: The first associated connector includes a tapered portion configured to engage an associated connector portion of the first connector.

116. The medical tube assembly according to any one of claims 113 to 115, wherein: The second portion of the second connector is an associated connector portion configured to engage with a second associated connector.

117. The medical tube assembly according to any one of claims 112 to 115, wherein: The second portion of the second connector is an intermediate portion between the tube connection portion of the second connector and an associated connector portion configured to engage with a second associated connector.

118. The medical tube assembly according to any one of claims 116 or 117, wherein: The second associated connector includes a tapered portion configured to engage an associated connector portion of the second connector.

119. The medical tube assembly according to any one of claims 112 to 118, wherein: The cross-sectional area of ​​the gas passage of the opening of the second associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

120. The medical tube assembly of any one of claims 112 to 119, wherein: The tube includes a cuff region located at or near a first end of the tube and / or a cuff region located at or near a second end of the tube.

121. The medical tube assembly of claim 118, wherein: The cuff region of the first end of the tube is held between a first collar and the tube connecting portion of the first connector and / or wherein the cuff region of the second end of the tube is held between a second collar of the second portion and the tube connecting portion.

122. The medical tube assembly of any one of claims 112 to 119, wherein: The tube includes a water absorbing material.

123. A medical tube assembly, the medical tube assembly comprising: A tube, the tube comprising: The main part, a first increasing gas passage cross-sectional area portion located at or near the first end of the tube and extending from the body portion, and a second increasing gas passage cross-sectional area portion, the second increasing gas passage cross-sectional area portion being located at or near the second end of the tube and extending from the body portion, a first connector having a tube connecting portion for connecting to the tube at a first end of the tube and a second portion, a second connector having a tube connecting portion for connecting to the tube at a second end of the tube and a second portion, wherein at least the tube connection portion of the first connector, the second portion of the first connector, the tube, the tube connection portion of the second connector and the second portion of the second connector define a gas passage of the assembly, wherein, in a direction toward the first end of the tube: a) the gas channel cross-sectional area of ​​the gas channel increases from the end of the main body portion closest to the first gradually increasing gas channel cross-sectional area portion through the first gradually increasing gas channel cross-sectional area portion, b) the gas passage cross-sectional area of ​​the gas passage decreases from the first increasing gas passage cross-sectional area portion to the tube connection portion of the first connector, and c) a gas passage cross-sectional area of ​​the gas passage increases from the tube connecting portion of the first connector to the second portion of the first connector, and wherein, in a direction toward the second end of the tube: a) the gas channel cross-sectional area of ​​the gas channel increases from the end of the main body portion closest to the second gradually increasing gas channel cross-sectional area portion through the second gradually increasing gas channel cross-sectional area portion, b) the gas passage cross-sectional area of ​​the gas passage decreases from the second increasing gas passage cross-sectional area portion to the tube connection portion of the second connector, and c) A gas passage cross-sectional area of ​​the gas passage increases from the tube connecting portion of the second connector to the second portion of the second connector.

124. The medical tube assembly of claim 123, wherein: The second portion of the first connector is an associated connector portion configured to engage with a first associated connector.

125. The medical tube assembly of claim 123, wherein: The second portion of the first connector is an intermediate portion between the tube connection portion of the first connector and an associated connector portion configured to engage with a first associated connector.

126. The medical tube assembly of claim 124 or 125, wherein: The first associated connector includes a tapered portion configured to engage an associated connector portion of the first connector.

127. The medical tube assembly of any one of claims 124 to 126, wherein: The cross-sectional area of ​​the gas passage of the opening of the first associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

128. The medical tube assembly of any one of claims 124 to 127, wherein: The second portion of the second connector is an associated connector portion configured to engage with a second associated connector.

129. The medical tube assembly of any one of claims 124 to 128, wherein: The second portion of the second connector is an intermediate portion between the tube connection portion of the second connector and an associated connector portion configured to engage with a second associated connector.

130. The medical tube assembly of claim 128 or 129, wherein: The second associated connector includes a tapered portion configured to engage an associated connector portion of the second connector.

131. The medical tube assembly of any one of claims 128 to 130, wherein: The cross-sectional area of ​​the gas passage of the opening of the second associated connector is smaller than the minimum cross-sectional area of ​​the gas passage of the medical tube assembly.

132. The medical tube assembly of any one of claims 123 to 131, wherein: The tube includes a cuff region located at or near a first end of the tube and / or a cuff region located at or near a second end of the tube.

133. The medical tube assembly of claim 132, wherein: The cuff region of the first end of the tube is held between a first collar and the tube connecting portion of the first connector and / or wherein the cuff region of the second end of the tube is held between a second collar of the second portion and the tube connecting portion.

134. The medical tube assembly of any one of claims 123 to 133, wherein: The tube includes a water absorbing material.

135. The medical tube assembly of any one of claims 112 to 134, wherein: The first increasing gas passage cross-sectional area portion and / or the second increasing gas passage cross-sectional area portion of the tube is corrugated.

136. The medical tube assembly of claim 135, wherein: The cross-sectional area of ​​the first gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, and the local nominal cross-sectional area is the average of an area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion defined by a trough of the first gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the first gradually increasing gas channel cross-sectional area portion defined by a peak of the first gradually increasing gas channel cross-sectional area portion adjacent to the trough.

137. The medical tube assembly of claim 135 or 136, wherein: The cross-sectional area of ​​the second gradually increasing gas channel cross-sectional area portion is defined by a local nominal cross-sectional area, and the local nominal cross-sectional area is the average of an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a trough of the second gradually increasing gas channel cross-sectional area portion and an area of ​​the gas channel of the second gradually increasing gas channel cross-sectional area portion defined by a peak of the second gradually increasing gas channel cross-sectional area portion adjacent to the trough.

138. The medical tube assembly of any one of claims 112 to 137, wherein: The first increasing gas passage cross-sectional area portion of the tube is defined by: a) the local minimum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion, or b) The local maximum cross-sectional area of ​​the gas channel in the portion of the gradually increasing cross-sectional area of ​​the gas channel.

139. The medical tube assembly of any one of claims 112 to 138, wherein: The second increasing gas passage cross-sectional area portion of the tube is defined by: a) the local minimum cross-sectional area of ​​the gas passage of the gradually increasing gas passage cross-sectional area portion, or b) a local maximum cross-sectional area of ​​the gas passage along the length of the increasing gas passage cross-sectional area portion.

140. The medical tube assembly of any one of claims 112 to 139, wherein: The cross-sectional diameter of the main body portion of the tube is smaller than the cross-sectional diameter of the first gradually increasing gas passage cross-sectional area portion and / or the second gradually increasing gas passage cross-sectional area portion.

141. A medical tube assembly, the medical tube assembly comprising: a tube defining a gas passage extending from a first end of the tube to a second end of the tube, a connector configured to connect to the first end of the tube, the connector defining a gas passage extending through the connector, and wherein the connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to deliver gas to a gas channel of the connector and / or receive gas from a gas channel of the connector when the associated connector is connected to the connector, and in, a) the cross-sectional area of ​​the gas passageway in the main body of the tube, and b) the minimum cross-sectional area of ​​the gas passage of the connector, are equal to or larger than the cross-sectional area of ​​the gas passage of the opening of the associated connector, and Wherein, the tube includes a portion of increasing gas passage cross-sectional area located near the first end of the tube.

142. A medical tube assembly, the medical tube assembly comprising: a tube defining a gas passage extending from a first end of the tube to a second end of the tube, a first connector configured to be connected to a first end of the tube, the first connector defining a gas passage extending through the first connector, a second connector configured to connect to a second end of the tube, the second connector defining a gas passage extending through the second connector, and wherein the first connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to receive gas from or deliver gas to a gas passage of the connector when the associated connector is connected to the connector, and in: a) the cross-sectional area of ​​the gas passage of the main part of the tube, b) the minimum cross-sectional area of ​​the gas passage of the first connector, and c) the minimum cross-sectional area of ​​the gas passage of the second connector, are equal to or larger than the cross-sectional area of ​​the opening of the associated connector.

143. The medical tube assembly of claim 142, wherein: The second connector is configured to connect to a second associated connector, the second associated connector comprising an opening configured to receive gas from or deliver gas to a gas channel of the connector when the second associated connector is connected to the second connector, and wherein: a) the cross-sectional area of ​​the gas passage of the main part of the tube, b) the minimum cross-sectional area of ​​the gas passage of the first connector, and c) the minimum cross-sectional area of ​​the gas passage of the second connector, are equal to or larger than the cross-sectional area of ​​the opening of the second associated connector.

144. The medical tube assembly of any one of claims 141 to 143, wherein: The gas passage cross-sectional area of ​​the main body of the tube is defined by: a) the minimum cross-sectional area of ​​the gas passageway in the main body of the tube, or b) the maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

145. The medical tube assembly of any one of claims 141 to 143, wherein: The gas passage cross-sectional area of ​​the main body of the tube is defined by: a) the local minimum cross-sectional area of ​​the gas passage in the main body of the tube, or b) the local maximum cross-sectional area of ​​the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional area, which is the average of the minimum cross-sectional area of ​​the gas passage of the main body of the tube and the maximum cross-sectional area of ​​the gas passage of the main body of the tube.

146. The medical tube assembly of claim 145, wherein: One or more of the following: a local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, a local minimum cross-sectional area of ​​the gas passage of the main portion of the tube, and / or a local nominal cross-sectional area of ​​the gas passage of the main portion of the tube, which is constant along the length of the main portion of the tube.

147. The medical tube assembly of any one of claims 141 to 146, wherein: The gas passage diameter of the main body of the tube is defined by: a) the minimum diameter of the gas passageway in the main body of the tube, or b) the maximum diameter of the gas passageway in the main body of the tube, or c) when the tube is corrugated, a nominal cross-sectional diameter, the nominal cross-sectional diameter being the average of the smallest diameter of the gas passages of the main body of the tube and the largest diameter of the gas passages of the main body of the tube.

148. The medical tube assembly of any one of claims 141 to 146, wherein: The gas passage diameter of the main body of the tube is defined by: a) the local minimum internal diameter of the gas passageway of the main body of the tube, or b) the local maximum internal diameter of the gas passageway of the main body of the tube, or c) when the tube is corrugated, a local nominal diameter of the gas passage diameter, the local nominal diameter being the average of the diameter between opposing troughs of the tube and the diameter between opposing peaks of the tube adjacent to the troughs.

149. The medical tube assembly of claim 145 or 148, wherein: One or more of the following: a local minimum inner diameter of the gas passage of the main body of the tube, a local maximum inner diameter of the gas passage of the main body of the tube, and / or a local nominal diameter of the gas passage of the main body of the tube, is constant along the length of the main body of the tube.

150. A medical tube assembly, the medical tube assembly comprising: a tube defining a gas passage extending from a first end of the tube to a second end of the tube, a connector configured to connect to the first end of the tube, the connector defining a gas passage extending through the connector, and wherein the connector is configured to be connected to an associated connector, the associated connector comprising an opening configured to receive gas from a gas passage of the connector or to deliver gas to a gas passage of the connector when the associated connector is connected to the connector, a first tube diameter, the first tube diameter being defined by a main body portion of the tube, a second tube diameter, the second tube diameter being defined by the tube at a first end of the tube, a tube end connector diameter, the tube end connector diameter being defined by the smallest diameter of the gas passageway of the tube connecting portion of the connector, wherein the second tube diameter is larger than the first tube diameter and the tube end connector diameter, and Wherein, the first tube diameter, the second tube diameter and the tube end connector diameter are all larger than the diameter of the opening of the associated connector.

151. A breathing set comprising an inspiratory tube, an expiratory tube as defined in any preceding claim and a humidification chamber.

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