Breathing tube assembly with adjustable elbow

Abstract

A respiratory tube assembly with an adjustable elbow for use with a respiratory treatment device, such as a continuous positive airway pressure (CPAP) device, includes an elbow that allows the position of the respiratory tube assembly to be adjusted relative to the respiratory treatment device. In some configurations, the breathing tube assembly includes a breathing tube and a rotating elbow. The breathing tube is rotationally fixed relative to the respiratory treatment device, and the rotary elbow is rotatable relative to the breathing tube. In other configurations, the respiratory tube assembly includes an elbow that may be coupled with a respiratory therapy device in one of several possible positions.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 201380041787.X, which has entered the Chinese national phase of international application PCT / NZ2013 / 000138 with the invention name “Breathing tube assembly with adjustable elbow” and the international application date of August 8, 2013. Technical Field

[0002] The present invention generally relates to respiratory therapy systems and breathing tube assemblies that can be used with respiratory therapy systems. In particular, the present invention relates to an elbow for a breathing tube assembly that allows adjustment of the breathing tube assembly relative to an accompanying treatment device. Background Art

[0003] Respiratory therapy systems and devices, including continuous positive airway pressure (CPAP) systems and devices, flow therapy systems and devices, and breathing tube assemblies for use with such devices are well known in the art. In addition, breathing tube assemblies that allow adjustment of the position of the breathing tube relative to the respiratory therapy device are known in the art. However, existing adjustable breathing tube assemblies are often complex to manufacture, resulting in high costs, and often have a shorter service life than non-adjustable assemblies. Summary of the invention

[0004] Therefore, there is a need for respiratory therapy systems and breathing tube assemblies that address one or more of the shortcomings in the art. Specifically, one or more embodiments of the present invention provide adjustments in assemblies relative to breathing tube assemblies of respiratory therapy devices that can be manufactured in a cost-effective manner and provide similar or increased service life relative to non-adjustable or prior art adjustable assemblies.

[0005] Preferred embodiments of respiratory therapy systems and breathing tube assemblies for use with respiratory therapy systems such as CPAP systems include an elbow that allows adjustment of the position of the breathing tube assembly relative to the respiratory therapy device. In some configurations, the breathing tube assembly includes a breathing tube and a swivel elbow. The breathing tube is rotationally fixed relative to the respiratory therapy device, and the swivel elbow is rotatable relative to the breathing tube. In other configurations, the breathing tube assembly includes an elbow that can be coupled to the respiratory therapy device in one of several possible positions.

[0006] Preferred embodiments relate to a respiratory therapy system including a flow generator, a flexible breathing tube assembly, a patient interface, and a swivel elbow. The flow generator generates a flow of breathing gas and includes an outlet for the flow of breathing gas. The flexible breathing tube assembly includes a connector and a tube having a first end and a second end. The first end is connected to the connector in a substantially non-rotating manner. The connector connects the breathing tube to the outlet of the flow generator. The patient interface is connected to the second end of the breathing tube so that the breathing tube can deliver the flow of breathing gas from the flow generator to the patient interface. The swivel elbow is rotatably connected to the connector of the breathing tube. The swivel elbow includes a joint portion that at least partially surrounds the breathing tube so as to connect the swivel elbow to the breathing tube. The swivel elbow further includes a curved surface portion that guides the first portion of the breathing tube into a curved shape. The breathing tube is rotatable relative to the joint portion of the swivel elbow so that the swivel elbow can be rotated relative to the connector to change the direction in which the breathing tube extends relative to the flow generator.

[0007] In some configurations, the swivel elbow has better resistance to deformation than the breathing tube, so that in use, the swivel elbow can prevent the breathing tube from being occluded due to being crushed by external forces. The engaging portion can completely surround the breathing tube. The engaging portion can only partially surround the breathing tube, thereby defining a slit in the engaging portion.

[0008] In some configurations, the curved surface portion extends between the portion of the swivel elbow that is coupled to the connector and the engagement portion. The curved surface portion may have a subtending angle of approximately 90 degrees in the length direction of the breathing tube. The curved surface portion may approximately surround half of the breathing tube in a circumferential direction. The curved surface portion may be located on an inner portion or an outer portion having a curved shape. The swivel elbow may also include a tab that is sized and shaped to facilitate gripping by a user. The tab may be positioned approximately opposite the curved surface portion or the engagement portion. The swivel elbow may be composed of a pair of interlocking halves.

[0009] In some configurations, the connector includes a first interference surface portion and the flow generator includes a second interference surface portion that engages the first interference surface portion to secure the breathing tube to the flow generator when the breathing tube is coupled to the flow generator. The second interference surface portion can be defined by an outlet of the flow generator, and the first interference surface portion can be defined by a portion of the connector that is received within the outlet. The second interference surface portion can be adjacent to the outlet of the flow generator, and the first interference surface portion can be defined by a portion of the connector adjacent to the outlet. The first interference surface portion can be defined by a tab of the connector that engages a corresponding recess of the flow generator. The second interference surface portion can be defined by at least one tab of the flow generator that engages an external shoulder of the swivel elbow that defines the first interference surface portion.

[0010] In some configurations, the connector includes a first electrical terminal configured to connect to a second electrical terminal on the flow generator. The first and second electrical terminals may connect a heat source of the flow generator to a heating coil of the breathing tube. The first and second electrical terminals may alternatively or additionally provide data communication between the breathing tube and the flow generator.

[0011] One embodiment relates to a breathing tube assembly including a flexible breathing tube that can be coupled to a flow generator to receive a flow of breathing gas from the flow generator and can be coupled to a patient interface to deliver the flow of breathing gas to the patient interface. A swivel elbow engages a portion of the breathing tube. The swivel elbow includes a curved surface portion that directs the portion of the breathing tube into a curved shape. The swivel elbow is rotatable relative to the flow generator and also rotatable relative to a portion of the breathing tube such that the swivel elbow can be rotated relative to the flow generator to change the direction in which the breathing tube extends relative to the flow generator.

[0012] In some configurations, the curved surface portion of the swivel elbow contacts the outer surface of the breathing tube. The curved surface portion may have a subtending angle of approximately 90 degrees in the length direction of the breathing tube. The curved surface portion may approximately surround half of the breathing tube in the circumferential direction. The curved surface portion may be located on an inner portion or an outer portion having a curved shape. The swivel elbow may also include a tab sized and shaped to facilitate gripping by a user. The tab may be positioned approximately opposite the curved surface portion or a portion of the swivel elbow that at least partially surrounds the breathing tube. The swivel elbow may be composed of a pair of interlocking halves.

[0013] In some configurations, the connector includes a first interference surface portion and the flow generator includes a second interference surface portion that engages the first interference surface portion to secure the breathing tube to the flow generator when the breathing tube is coupled to the flow generator. The second interference surface portion can be defined by an outlet of the flow generator, and the first interference surface portion can be defined by a portion of the connector that is received within the outlet. The second interference surface portion can be adjacent to the outlet of the flow generator, and the first interference surface portion can be defined by a portion of the connector adjacent to the outlet. The first interference surface portion can be defined by a tab of the connector that engages a corresponding recess of the flow generator. The second interference surface portion can be defined by at least one tab of the flow generator that engages an external shoulder of the swivel elbow that defines the first interference surface portion.

[0014] In some configurations, the connector includes a first electrical terminal configured to connect to a second electrical terminal on the flow generator. The first and second electrical terminals may connect a heat source of the flow generator to a heating coil of the breathing tube. The first and second electrical terminals may alternatively or additionally provide data communication between the breathing tube and the flow generator.

[0015] Embodiments relate to a respiratory therapy system including a flow generator, a flexible breathing tube assembly, and a patient interface. The flow generator generates a flow of breathing gas and includes an outlet for the flow of breathing gas. The flow generator also includes a first electrical terminal and a second electrical terminal. The flexible breathing tube assembly includes a tube and a connector. The tube has a first end and a second end. The first end of the tube is connected to the connector. The connector connects the breathing tube assembly to the outlet of the flow generator. The connector has a tube electrical terminal that can be connected to the first electrical terminal or the second electrical terminal of the flow generator. The patient interface is connected to the second end of the tube so that the breathing tube assembly can deliver the flow of breathing gas from the flow generator to the patient interface. The breathing tube assembly can be connected to the flow generator in a first position (wherein the tube electrical terminal is connected to the first electrical terminal of the flow generator), and can be connected to the flow generator in a second position (wherein the tube electrical terminal is connected to the second electrical terminal of the flow generator).

[0016] In some configurations, the outlet of the flow generator defines an outlet axis, and the first end of the tube defines a tube axis, and the connector orients the tube axis at an angle relative to the outlet axis in each of the first position and the second position. The angle can be approximately 90 degrees. The tube can extend in a first direction when the breathing tube assembly is in a first position, and can extend in a second direction when the breathing tube assembly is in a second position, wherein the second position is opposite to the first direction.

[0017] In some configurations, the connector includes a first interference surface portion and the flow generator includes a second interference surface portion that engages the first interference surface portion to secure the breathing tube to the flow generator when the breathing tube is coupled to the flow generator. The second interference surface portion can be defined by an outlet of the flow generator, and the first interference surface portion can be defined by a portion of the connector that is received within the outlet. The first interference surface portion can be defined by a tab of the connector that engages a corresponding recess of the flow generator.

[0018] In some configurations, the first and second electrical terminals and the tube electrical terminal connect the heat source of the flow generator with the heating coil of the breathing tube. The first and second electrical terminals and the tube electrical terminal may additionally or alternatively provide data communication between the breathing tube and the flow generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and other features, aspects and advantages of a breathing tube assembly with an elbow are described herein with reference to the accompanying drawings of preferred embodiments, which are provided for purposes of illustration and not limitation. The drawings contain thirty (30) figures.

[0020] Figure 1 is a perspective view of a flow generator and a breathing tube assembly including a tube, a connector, and a swivel elbow.

[0021] Figure 2 It is separated from the flow generator Figure 1 A perspective view of a breathing tube assembly.

[0022] Figure 3 yes Figure 2 A perspective view of a breathing tube assembly with the swivel elbow separated from the tube and the connector.

[0023] Figure 4 It is along Figure 1 The line 4-4 is intercepted Figure 1 Cross-sectional view of the flow generator and breathing tube assembly.

[0024] Figure 5 is a perspective view of a flow generator and an alternative breathing tube assembly including a tube, a connector, and a swivel elbow.

[0025] Figure 6 It is separated from the flow generator Figure 5 A perspective view of a breathing tube assembly.

[0026] Figure 7 yes Figure 6 A perspective view of a breathing tube assembly with the swivel elbow separated from the tube and the connector.

[0027] Figure 8 It is along Figure 5 The line 8-8 is intercepted Figure 5 Cross-sectional view of the flow generator and breathing tube assembly.

[0028] Fig. 9 is a perspective view of a flow generator and yet another alternative breathing tube assembly including a tube, a connector, and a swivel elbow.

[0029] Fig.10 It is separated from the flow generator Fig. 9 A perspective view of a breathing tube assembly.

[0030] Fig.11 yes Fig.10 A perspective view of a breathing tube assembly with the swivel elbow separated from the tube and the connector.

[0031] Fig.12 It is along Fig. 9 The line 12-12 is intercepted Fig. 9 Cross-sectional view of the flow generator and breathing tube assembly.

[0032] Fig.13 is a perspective view of an alternative swivel elbow including smaller slits extending lengthwise at each end of the elbow.

[0033] Fig.14 is a perspective view of yet another alternative swivel elbow including a Fig.13 The swivel elbow has a larger slit.

[0034] Fig.15 is a perspective view of another alternative swivel elbow which omits one of the loop end portions of the aforementioned swivel elbow.

[0035] Fig.16 is a perspective view of a flow generator and an alternative breathing tube assembly, the breathing tube assembly including a tube and an elbow connector. The flow generator includes a first electrical terminal and a second electrical terminal. The breathing tube assembly includes a tube electrical terminal that is connected to a first electrical terminal at a first location of the breathing tube assembly and to a second electrical terminal at a second location of the breathing tube assembly. The elbow connector includes an interlocking configuration for selectively securing the breathing tube assembly to the flow generator.

[0036] Fig.17 It is separated from the flow generator Fig.16 A perspective view of a breathing tube assembly.

[0037] Fig.18 It is along Fig.16 The line 18-18 is intercepted Fig.16 Cross-sectional view of the flow generator and breathing tube assembly.

[0038] Fig.19 is the flow generator and relative to Figure 16-18 A perspective view of an alternative breathing tube assembly of the assembly.

[0039] Fig. 20 It is separated from the flow generator Fig.19 A perspective view of a breathing tube assembly.

[0040] Fig.21 It is along Fig.19 The line 21-21 is intercepted Fig.19 Cross-sectional view of the flow generator and breathing tube assembly.

[0041] Fig. 22 is the flow generator and relative to Figure 16-21 A perspective view of another alternative breathing tube assembly of the assembly.

[0042] Fig.23 It is separated from the flow generator Fig. 22 A perspective view of a breathing tube assembly.

[0043] Fig.24 It is along Fig. 22 The line 24-24 is intercepted Fig. 22 Cross-sectional view of the flow generator and breathing tube assembly.

[0044] Fig.25 is the flow generator and relative to Figure 16-24 A perspective view of yet another alternative breathing tube assembly of the assembly.

[0045] Fig.26 It is separated from the flow generator Fig.25 A perspective view of a breathing tube assembly.

[0046] Fig. 27 It is along Fig.25 The line 27-27 is intercepted Fig.25 Cross-sectional view of the flow generator and breathing tube assembly.

[0047] Fig.28 is a traffic generator and is similar to Figure 1-15 A perspective view of a breathing tube assembly of a breathing tube assembly. Fig.28 The breathing tube assembly includes a tube, a connector, and a swivel elbow.

[0048] Fig.29 It is separated from the flow generator Fig.28 A perspective view of the interior of the breathing tube assembly.

[0049] Fig.30It is separated from the flow generator Fig.28 A perspective view of the exterior of the breathing tube assembly. DETAILED DESCRIPTION

[0050] This article describes these respiratory therapy systems, breathing tube assemblies and related components in the context of a healthcare respiratory device that provides respiratory gas at or above a minimum pressure or flow rate, which is preferably a pressure that is elevated relative to ambient pressure. Specifically, the respiratory therapy system shown is a continuous positive airway pressure (CPAP) device that provides respiratory gas (e.g., air) at or above a minimum pressure. The pressure level can be fixed or variable. Examples of suitable CPAP devices include CPAP devices from the ICON™ series or SleepStyle™ series sold by Fisher & Paykel Healthcare Co., Ltd. However, the disclosed systems, breathing tube assemblies and related components can also be used in other contexts or applications. For example, these systems, breathing tube assemblies and related components can be used in adult, pediatric or infant respiratory systems and surgical humidification systems in particular. Therefore, the use of the terms "humidifier", "humidification device" or "CPAP device" herein is also intended to cover other types of flow generators (humidified or non-humidified).

[0051] Figure 1-4 A respiratory therapy system 100 is shown that provides a flow of breathing gas (e.g., air) at a positive pressure to a patient interface 102 for, among other purposes, treating obstructive sleep apnea. System 100 includes a flow generator 104, as described above, preferably a CPAP device that produces a humidified flow of breathing gas (e.g., air). CPAP device 104 preferably includes an internal water reservoir (not shown), a heating device that heats water in the water reservoir, and a blower or pump (not shown) that produces the air flow. The air flow passes through the water reservoir to increase the humidity of the air flow, and the humidified air flow is delivered to outlet 106 ( Figure 4 ). In other configurations, flow generator 104 may provide a non-humidified flow of breathing gas, which may be air or another suitable gas.

[0052] The conduit or breathing tube assembly 110 is coupled to the outlet 106 at one end and to the patient interface 102 at the other end to deliver the humidified air flow from the outlet 106 to the patient interface 102. The patient interface 102 can be any suitable type of interface that can deliver the air flow to the patient's respiratory system. The patient interface 102 shown is a nasal mask that covers the patient's nose but not the patient's mouth. Other suitable patient interfaces include, for example, but are not limited to, full-face masks, nasal cannulas, endotracheal interfaces, or tracheostomy interfaces.

[0053] The breathing tube assembly 110 preferably includes a tube portion or tube 112, a connector 114, and a swivel elbow 116. The tube 112 is a flexible tube that provides free movement of the patient interface 102 relative to the CPAP device 104. That is, preferably, the tube 112 is able to bend along its length without a significant amount of resistance, thereby providing the movement of the user of the system 100 within the range of movement of the breathing tube assembly 110. The tube 112 can be connected to the patient interface 102 by any suitable configuration, such as, for example but not limited to, an interlocking or friction fit configuration. Preferably, the tube 112 includes an integrated electrical component or circuit 120, which can be a heating circuit or heating coil, a data circuit, any other type of electrical component or circuit, or any combination thereof. In the illustrated tube 112, the electrical component 120 is a spirally wound heating coil enclosed within the wall of the tube 112.

[0054] The connector 114 is coupled to the end of the tube 112 opposite the patient interface 102 and allows the breathing tube assembly 110 to be connected to the CPAP device 104. The connector 114 can be coupled to the end of the tube 112 in any suitable manner to create a closed or substantially closed connection therebetween. The connector 114 is preferably permanently coupled to the tube 112, but can also be removably coupled to the tube 112 if desired. The connector 114 is configured to be received within the outlet 106 of the CPAP device 104. Specifically, preferably, the connector 114 includes a flange portion or flange 122 and a shaft portion or shaft 124 extending from the flange 122 in a direction opposite to the tube 112. The shaft 124 is hollow and defines an inner passage 126 that communicates with the inner passage of the tube 112. In the illustrated configuration, the shaft 124 of the connector 114 is received within the outlet 106 of the CPAP device 104; however, in other configurations, the connector 114 may define a female portion of the connection and the outlet 106 may define a male portion.

[0055] Preferably, when the breathing tube assembly 110 is assembled to the CPAP device 104, the flange 122 abuts against an exterior surface of the CPAP device 104. The flange 122 also carries electrical terminals that engage complementary electrical terminals of the CPAP device 104 to allow electrical signals or electrical energy to be transmitted between the CPAP device 104 and the breathing tube assembly 110. In the illustrated configuration, the electrical terminals of the connector 114 are plugs 130, and the electrical terminals of the CPAP device 104 are sockets or ports 132 ( Figure 8). However, if desired, this configuration can also be reversed. Plug 130 is electrically connected to the heating coil 120 and / or other electrical components of the breathing tube assembly 110. Port 132 is electrically connected to the heating circuit and / or other electrical circuit of the CPAP device 104. Preferably, the heating circuit of the CPAP device 104 provides electrical energy to the heating coil 120 of the breathing tube assembly 110, so that the heating coil 120 can provide thermal energy to the humidified air flow passing through the breathing tube assembly 110. As is known, such a configuration can prevent or limit condensation within the breathing tube assembly 110. In addition, or alternatively, the plug 130 and the port 132 can provide other electrical signals, such as data signals, for communication between the CPAP device 104 and the breathing tube assembly 110. For example, a sensor at the patient interface end of the breathing tube assembly 110 can provide data about one or more parameters of the air flow (e.g., temperature, humidity level) for use by the control system of the CPAP machine. Any other desired signal can also be transmitted.

[0056] Preferably, the connector 114 includes features that facilitate insertion of the connector 114 into the outlet 106 of the CPAP device 104 and / or retention of the connector 114 therein. For example, the shaft 124 of the connector 114 can include a guide rib 134 extending in the longitudinal direction of the shaft 124. The guide rib 134 can engage a complementary groove (not shown) of the outlet 106 to assist in inserting the connector 114 into the outlet 106 while the plug 130 and the port 132 are properly aligned. In addition to or in lieu of the guide rib 134, the plug 130 can be sized relative to the illustrated outlet 106. Figure 1-4 For example, the length of the plug 130 can be about 3 / 4 of the length of the shaft 124 to about the same length as or longer than the shaft 124. In such a configuration, the plug 130 will engage the port 132 early and the auxiliary connector 114 will be properly aligned with the outlet 106 and inserted therein. In the illustrated configuration, the guide ribs 134 are opposite the position of the plug 130.

[0057] The connector 114 preferably also includes a feature that facilitates retention of the connector 114 on the CPAP device 104. In some configurations, the feature is an interlocking configuration between the connector 114 and the CPAP device 104. In the illustrated configuration, the shaft 124 includes a protrusion 136 that defines an interference surface or an interlocking surface. The outlet 106 includes a complementary recess 140 that also defines an interference surface or an interlocking surface. When the connector 114 is coupled to the CPAP device 104, the protrusion 136 is received within the recess 140, and the interaction between their corresponding interference surfaces produces a retention force that tends to inhibit undesired disconnection of the connector 114 from the CPAP device 104. In some configurations, the positions of the protrusion 136 and the recess 140 may be reversed. The illustrated protrusion 136 and recess 138 are elongated and extend in the circumferential direction of the shaft 124 and the outlet 106, respectively. In addition, preferably, more than one protrusion / recess pair 136 / 140 is provided. In the illustrated arrangement, two pairs of corresponding projections 136 and recesses 140 are provided and are equally spaced about the circumference of the shaft 124. While the projection 136 and recess 140 arrangement is preferred, other suitable types of interlocking or interference arrangements may also be used.

[0058] Preferably, the breathing tube assembly 110 includes one or more features that orient a portion of the breathing tube 112 to bend and / or provide crush protection to a portion of the breathing tube 112. Preferably, the breathing tube 112 is also movable relative to the CPAP device 104 so that the breathing tube 112 can be oriented in at least two different positions and preferably in any of a range of possible positions. In some configurations, the portion of the breathing tube 112 that is oriented to bend and / or provided crush protection is a portion of the tube 112 adjacent to the connector 114. In some cases, the outlet 106 is positioned on a rear surface of the CPAP device 104 (e.g., relative to a user interface or otherwise defined front surface). Therefore, it is often desirable to bend the breathing tube 112 at or near the connector 114 / outlet 106 to reduce the amount of space necessary on the outlet side (e.g., rear surface) of the CPAP device 104 to accommodate the breathing tube 112. In addition, the rear (or other) positioning of the outlet 106 may create a risk that the CPAP device 104 is pushed against a wall or other object and that the breathing tube 112 is crushed against the wall or other object, which may cause partial or complete occlusion of the breathing tube 112 and / or cause damage to the breathing tube 112. Therefore, it is often desirable to provide a certain amount of protection to the breathing tube 112, especially the portion of the breathing tube 112 at or near the outlet 106. The CPAP device 104 can also be positioned on either side of the patient / user. Therefore, it is often also desirable to allow the breathing tube 112 to be adjustable (e.g., rotatable) relative to the CPAP device 104. In the illustrated configuration, the swivel elbow 116 provides each of the above-mentioned features. That is, the illustrated swivel elbow 116 facilitates bending of the tube 112, provides crush protection for the tube 112, and allows the position of the tube 112 to be changed relative to the CPAP device 104. However, in other configurations, the swivel elbow 116 may not provide all of these features. For example, the swivel elbow 116 may provide any one or a combination of the features described above.

[0059] Preferably, the swivel elbow 116 promotes, guides, constrains or otherwise directs a portion of the tube 112 into a curved or curved orientation. Preferably, the curved portion of the tube 112 is proximate to or adjacent to the connector 114. The illustrated swivel elbow 116 includes a first portion or connector engaging portion 142 that contacts and preferably engages the connector 114. The swivel elbow 116 also includes a second portion or tube engaging portion 144 that contacts and preferably engages the tube 112. In the illustrated configuration, the connector engaging portion 142 and the tube engaging portion 144 are in the form of a strip that substantially or completely surrounds the circumference of the connector 114 and / or the tube 112. In alternative configurations, the swivel elbow 116 can instead be coupled to the CPAP device 104 while retaining some or all of the functionality described herein.

[0060] The swivel elbow 116 further includes a tube guide portion 146 extending between the connector engagement portion 142 and the tube engagement portion 144. Preferably, the tube guide portion 146 defines a curved surface 150 that guides the tube 112 to a curved orientation. Therefore, the axis of the connector engagement portion 142 is offset at a certain angle relative to the axis of the tube engagement portion 144. In the illustrated configuration, the angle is approximately 90 degrees. However, in other configurations, the angle can be any angle within a range between about 45 degrees and about 180 degrees. If desired, the angle can also be outside this range. In some configurations, for example, by providing a pivot in the swivel elbow 116, the angle is adjustable. Preferably, at least a portion of the curved surface 150 contacts the tube 112; however, the tube guide portion 146 can also be configured to simply interconnect the connector engagement portion 142 and the tube engagement portion 144, which orients the tube 112 to be curved, with little or no contact between the tube 112 and the tube guide portion 146. Additionally, while the connector engaging portion 142 , tube engaging portion 144 , and tube guiding portion 146 are exterior to the tube 112 , in alternative configurations, one or more of these structures may be interior to the tube 112 .

[0061] Preferably, the swivel elbow 116 also provides at least some degree of crush protection to the tube 112. Therefore, preferably, the swivel elbow 116, or at least the tube guide portion 146, is constructed from a material that is harder than the tube 112 or has better bending resistance relative to the tube 112. Harder plastics, metals, or other materials may be used, although in a preferred embodiment it is constructed from plastic. Preferably, the tube guide portion 146 can maintain its shape in response to expected crushing forces in normal use of the system 100. The tube guide portion 146 can completely surround the circumference of the tube 112; however, in the illustrated configuration, the tube guide portion 146 only partially surrounds the tube 112. Specifically, the illustrated tube guide portion 146 surrounds approximately or exactly half of the circumference of the tube 112. Preferably, the tube guide portion 146 is positioned outside the tube 112 relative to the bend (e.g., the center point of the bend radius) so that the tube guide portion 146, rather than the tube 112, is positioned to contact a wall or other object, thereby reducing the likelihood of partial or complete occlusion of the tube 112. As described above, the tube guide portion 146 can be inside or outside the tube 112.

[0062] Preferably, the swivel elbow 116 is rotatable about at least the longitudinal axis of the outlet 106 of the CPAP device 104 to allow the position of the tube 112 to be changed relative to the CPAP device 104. In the illustrated configuration, the swivel elbow 116 can rotate 360 ​​degrees or more about the axis of the outlet 106. That is, the swivel elbow 116 can rotate in a single direction for multiple rotations. However, in other configurations, the rotation of the swivel elbow 116 may be limited due to the structure of the elbow 116 or due to interference with other components / objects. For example, the rotation of the swivel elbow 116 may be less than 45 degrees, equal to or greater than 45 degrees, equal to or greater than 180 degrees, or equal to or greater than 270 degrees, among other possibilities.

[0063] As described above, the swivel elbow 116 can be coupled to the connector 114. In the illustrated configuration, the connector engagement portion 142 receives the boss 152 of the connector 114, which extends from the flange 122 in the opposite direction of the axis 124. However, in addition to other possible connection configurations, this configuration can be reversed and the connector engagement portion 142 can be received in the boss 152. Preferably, the interlocking configuration fixes the connector engagement portion 142 to the boss 152 in the axial direction, but allows rotation therebetween. The illustrated interlocking configuration includes a circumferential protrusion 154 defined by one of the connector engagement portion 142 and the boss 152 and a complementary circumferential groove 156 defined by the other of the connector engagement portion 142 and the boss 152. In the illustrated configuration, the protrusion 154 is defined by the boss 152, and the groove 156 is defined by the connector engagement portion 142; however, this configuration can be reversed. Additionally, the illustrated protrusions 154 are not continuous around the entire circumference of the boss 152. Specifically, the illustrated protrusions 154 include at least one pair, and preferably exactly one pair, of protrusions 154 that are equally spaced about the circumference of the boss 152. Additionally, other types of interlocking configurations may be used.

[0064] Preferably, the swivel elbow 116 is not coupled to the tube 112 and does not tightly surround the tube 112, thereby allowing relative rotation between the swivel elbow 116 and the tube 112. Preferably, the tube 112 is relatively loosely received in the swivel elbow 116, so that there is or may be a gap when the tube 112 is centered relative to the swivel elbow 116 to facilitate relative rotation therebetween. That is, the tube 112 preferably does not rotate relative to the outlet 106 of the CPAP device 104, but only changes position by relying on the flexibility of the tube 112. In some configurations, the gap between the tube 112 and the inner surface of the swivel elbow 116 can be within the range of about 0.05-0.1 mm. However, the gap can also be smaller or larger than this range. Since the swivel elbow 116 can rotate relative to the connector 114, and the tube 112 can slide or rotate in the swivel elbow 116, the position of the tube 112 relative to the CPAP device 104 can be adjusted, wherein the swivel elbow 116 can guide the tube 112 in a desired direction. Advantageously, such a configuration provides for adjustment of the tube 112 relative to the CPAP device 104 while maintaining an electrical connection between the electrical terminals 130, 132, wherein a simpler structure is cost-effective to manufacture and provides a long service life. In an alternative configuration, the swivel elbow 116 can provide additional freedom of movement. For example, the swivel elbow 116 can be allowed to rotate about one or more axes that are perpendicular or substantially perpendicular to the axis of the outlet 106, the shaft 124, and / or the boss 152 (e.g., via a ball joint).

[0065] In use, the CPAP device 104 can be set to normal, with the water reservoir filled (if applicable), the device 104 plugged in, and the operating mode or parameters set correctly. If necessary, the swivel elbow 116 can be assembled to the tube 112 and the connector 114. For example, the swivel elbow 116 can be slid from the end of the patient interface-tube 112 to the end of the connector-tube 112, and can be connected to the connector 114 via an interlocking configuration. The patient interface 102 can be connected to the tube 112, and the breathing tube assembly 110 can be connected to the CPAP device 104 by connecting the connector 114 to the outlet 106. The swivel elbow 116 can be rotated (directly or indirectly through the movement of the tube 112) to orient the tube 112 and the patient interface 102 in a desired position relative to the CPAP device 104 (e.g., to the right, left, above or below) while maintaining the connection between the electrical terminals 130, 132. The CPAP device 104 can then be used according to the desired scheme.

[0066] Figure 5-8 Another respiratory therapy system 100 is shown, which includes Figure 1-4Therefore, the same reference numbers are used to indicate corresponding or similar parts, and only the differences between these systems 100 are described. Parts, components or features not specifically described can be assumed to be the same. Figure 1-4 The same parts, components, or features of system 100 are the same or similar.

[0067] exist Figure 5-8 In the system 100 of FIG. 1 , the connector 114 includes an alternative interlocking configuration for securing the connector 114 to the CPAP device 104. Specifically, in the illustrated interlocking configuration, the flange 122 of the connector 114 includes a resilient tab 200 that engages a corresponding recess 202 of the CPAP device 104. Preferably, the tab 200 is located opposite the electrical plug 130; however, other locations are possible. The tab 200 has a length that is approximately the same as or slightly longer than the length of the plug 130. Preferably, the tab 200 is shorter than the guide rib 134 (if present), which is preferably located halfway between the tab 200 and the plug 130.

[0068] The tab 200 is preferably generally U-shaped and has a free end 204 and a fixed end 206 that couples with the flange 122 or other portion of the connector 114. Preferably, the tab 200 is integral with the connector 114 and / or the flange 122. The closed end of the U-shaped tab 200 preferably extends away from the flange 122 in the same direction as the axis 124. The interference surface is defined by the protrusion 136 located on the leg of the U-shaped tab 200, which is the leg that defines the free end 204 in the illustrated configuration. However, in some configurations, the protrusion 136 can be located on the other leg or on both legs. The free end 204 is movable so that the protrusion 134 can enter the recess 202 and thereby engage a corresponding interference surface defined by the space, opening, or recess 140 extending from the recess 202. In the illustrated configuration, the interference surfaces are defined by the outer housing of the CPAP device 104, and the protrusion is received in the space behind the housing (inside the CPAP device 104). The resiliency of the U-shaped tab 200 maintains contact between the interference surfaces until the free end 204 is moved away from the interference surfaces and allows the connector 114 to be disconnected from the outlet 106. Preferably, the flange 122 defines a pair of prongs 210 that receive the tab 200 therebetween, thereby providing protection to the tab 200 and preventing out-of-plane movement of the tab 200. In other aspects, Figure 5-8 The system 100 and breathing tube assembly 110 are similar in structure and operation to Figure 1-4 The system 100 and the tube assembly 110 are shown.

[0069] Figure 9-12Another respiratory therapy system 100 is shown, which includes Figure 1-4 The breathing tube assembly 110 is similar to the system 100 of 5-8. Therefore, the same reference numbers are used to indicate corresponding or similar parts, and only the differences between these systems 100 are described. Parts, components or features not specifically described can be assumed to be the same. Figure 1-4 The same parts, components or features of system 100 of 5-8 are the same or similar.

[0070] exist Figure 9-12 In the system 100 of FIG. 1 , an alternative interlocking configuration is provided for securing the connector 114 to the CPAP device 104. Specifically, in the illustrated interlocking configuration, the swivel elbow 116 includes an annular portion 220 surrounding all or a portion of the flange 122 of the connector 114. The transition between the connector engagement portion 142 and the annular portion 220 defines a shoulder 222 or interference surface. The CPAP device 104 includes at least one and preferably a pair of resilient tabs 224 that engage the annular portion 220 of the swivel elbow 116 to secure the connector 114 and the swivel elbow 116 to the CPAP device 104 in an axial direction, but allow rotation between the swivel elbow 116 and the CPAP device 104. The connector 114 is preferably prevented from rotating relative to the CPAP device 104 by the plug 130 and / or other structures (e.g., guide ribs 134). These tabs 224 include hook portions 226 that define interference surfaces that contact one or more interference surfaces of the swivel elbow 116. In other respects, Figure 9-12 The system 100 and breathing tube assembly 110 are similar in structure and operation to Figure 1-4 Or 5-8 of these systems 100 and tube assemblies 110.

[0071] Figure 13-15 A swivel elbow 116 is shown, which is similar to Figure 1-4 , 5-8 and 9-12 of the swivel elbow 116. Therefore, the same reference numerals are used to indicate corresponding or similar parts, and only the differences between these swivel elbows 116 are described. Features not specifically described can be assumed to be the same as Figure 1-4 , 5-8 or 9-12 are the same or similar to the same or corresponding features of the rotary bend 116.

[0072] Fig.13The swivel elbow 116 includes a slit 230 in at least one of the connector engaging portion 142 or the tube engaging portion 144, and preferably includes a slit 230 in each. As a result, these portions 142 and / or 144 do not completely surround the circumference of the connector 114 or the tube 112 when assembled. Preferably, these slits 230 extend completely through these portions 142 and / or 144 in the longitudinal direction. These portions 142, 144 can have sufficient flexibility to allow the connector 114 or the tube 112 to pass through the slit 230 when the portions 142, 144 are flexed outwardly. However, preferably, the flexure provided by these portions 142, 144 is sufficient to easily assemble the portions 142, 144 to the connector 114 or the tube 112.

[0073] Fig.14 The swivel elbow 116 includes slits 230, which are smaller than Fig.13 These slits 230 of the swivel elbow 116 are wider or longer in the circumferential direction. Fig.14 The slits 230 may extend about 1 / 4 or more of the circumference of the portions 142 and / or 144. Preferably, Fig.14 The slits 230 of the elbow 116 may allow the tube 112 or the connector 114 to pass through the slits 230 .

[0074] Fig.15 The swivel elbow 116 includes a truncated tube engagement portion 144. That is, the tube engagement portion 144 does not extend around the entire circumference of the tube 112 when assembled. Preferably, the tube engagement portion 144 and the tube guide portion 146 are generally coextensive in the circumferential direction. In some cases, this can be about half of the circumference of the tube 112. In other cases, this can be between about half and three quarters of the circumference of the tube 112, or between about five eighths and three quarters of the circumference of the tube 112.

[0075] Any of the above-described swivel elbows 116 can be constructed from a single piece of material or multiple pieces of material (same or different materials) connected together in any manner. For example, in some cases, the elbow 116 is constructed from two lengthwise separate halves that can be coupled together (e.g., a clamshell configuration). This can allow for easy assembly to the connector 114 and tube 112 without passing the elbow 116 through the entire tube 112.

[0076] Figure 16-27 An alternative system 100 is shown that includes an alternative connection between the breathing tube assembly 110 and the CPAP device 104. Therefore, the same reference numerals are used to indicate corresponding or similar components, and only the components described in detail are described. Figure 16-27 These are differences between the system 100 and existing systems. Features not specifically described may be assumed to be the same as Figure 1-12The same or corresponding features of these systems are the same or similar.

[0077] exist Figure 16-27 In these systems, a fixed elbow connector 114 is provided for coupling the tube 112 to the CPAP device 104. That is, in at least some configurations, these elbow connectors 114 cannot rotate relative to the CPAP device 104, while remaining connected to the CPAP device 104. Instead, preferably, these elbow connectors 114 are configured to be connectable to the CPAP device 104 in at least two independent orientations or positions, and provide an electrical connection between the breathing tube assembly 110 and / or the patient interface 102 and the CPAP device 104 in each of these independent positions. In the illustrated configuration, the CPAP device 104 includes two electrical terminals 132a and 132b, which may be in the form of electrical ports or sockets. These connectors 114 include a single electrical terminal 130, which may be in the form of a plug and may be connected to either of these electrical terminals 132a, 132b of the CPAP device 104. In other configurations, these structures may be reversed and the ports may be provided on the connector 114 and the plug on the CPAP device 104 . Figure 16-27 These configurations advantageously allow the breathing tube assembly 110 to be coupled to the CPAP device 104 in at least two positions (which can be selected based on the position of the user or patient relative to the CPAP device 104) while providing electrical connection in either position. In the illustrated configuration, these positions are substantially opposite to each other (i.e., the tube 112 extends on the left and the tube 112 extends on the right). In other configurations, these positions can be varied to remain opposite to each other (e.g., up and down) or to provide two options that are not opposite to each other (e.g., horizontal and vertical). In addition, more than two options can be provided (e.g., left, right, up and down). In the illustrated configuration, the connector 114 defines an angle of approximately or substantially 90 degrees between the axis of the breathing tube 112 (e.g., at the end coupled to the connector 114) and the axis of the outlet 106 of the CPAP device 104, thereby providing a relatively compact configuration. However, in other configurations, this angle can vary. Figure 16-27 The alternative connectors 114 differ from each other primarily in the method by which the connector 114 and the CPAP device are interconnected. Therefore, only the different interconnection structures are described in detail below.

[0078] exist Figure 16-18In the configuration of the connector 114, the connector 114 includes at least one and preferably a pair of resilient portions or resilient arms 250 that are movable relative to the body 252 of the connector 114. Each arm 250 includes a fixed end 254 connected to the body 252 and a movable end, which may be a free end 256 that is movable toward or away from the body 252. The arms 250 are arranged on opposite sides of the body 252. In the illustrated configuration, the arms 250 are integrally formed with the body 252; however, in other configurations, the arms 250 may be separate components from the body 252. Preferably, the arms 250 extend in a direction corresponding to an axis from the outlet 106 of the fixed end 254 to the free ends 256 of the arms 250, and have a length equal to or greater than about half the length of the body 252 of the connector 114.

[0079] The fixed end 254 of each arm 250 is in the form of a pair of spaced apart connecting portions 260, which may provide most or all of the flexibility of the arms 250. The free ends 256 of the arms 250 preferably include tabs 262 configured to selectively engage corresponding recesses or openings 264 of the CPAP device 104 to secure the connector 114 (and the breathing tube 112) to the CPAP device 104. The tabs 262 and recesses or openings 264 define cooperating interference surfaces that contact each other when the tabs 262 are present in the recesses or openings 264, thereby inhibiting or preventing the connector 114 from being removed from the CPAP device 104. In other configurations, the positions of the tabs 262 and recesses or openings 264 may be reversed, or other suitable interlocking structures may be provided. Preferably, the arms 250 also define finger grip portions 266 including ridges or other grip-enhancing features that can be used to squeeze the arms 250 (assuming a pair of arms 250 are present) toward the body 252 and toward each other to release the tab 262 from the recess or opening 264.

[0080] Figure 19-21 The connector 114 of the embodiment of the present invention includes a single resilient arm 250 extending along one side of a body 252 of the connector 114. Preferably, the arm 250 extends along an opposite side of the body 252 relative to the tube 112. In the illustrated configuration, the fixed end 254 of the arm 250 begins at or near the rear end of the body 252 and has a length of at least about half the length of the body 252. Preferably, the arm 250 is elongated in width, except for a finger grip portion 266 (which is wider than the rest of the arm 250), which finger grip portion may be circular or substantially circular in shape and may be located approximately midway between the fixed end 254 and the tab 262 located at the free end 256.

[0081] Figure 22-24The connector 114 includes at least one and preferably a pair of resilient arms 250 on opposite sides of the body 252. Preferably, the arms 250 are positioned within a recessed central portion 270 such that the arms 250 are generally or substantially flush or recessed within a peripheral portion of the body 252. The fixed ends 254 are located at the open end of the connector 114 closer to the free ends 256, which are located toward the rear end of the body 252. The tab 262 of each arm 250 is located between the fixed end 254 and the free end 256. Preferably, the finger grip portion 266 is located at or near the free end 256 of the arm 250. It should be noted that the "free" ends 256 of the arms 250 in this connector 114 are not completely disconnected from the body 252. Instead, the free ends 256 are connected by a portion 272 ( Fig.24 ) is connected to the body 252 to allow movement of the free end 256. In the illustrated configuration, the portion of reduced wall thickness 272 also extends along the sides of these arms 250. Therefore, the term "free end" as used herein applies to the movable end of the flexible arm, which can be completely disconnected from the surrounding structure or can be configured to allow the "free end" to move sufficiently relative to the surrounding structure to complete the designated task of the flexible arm (e.g., the tab 262 is disconnected from the recess or opening 264). In addition, the flexible arm only needs to be movable relative to the surrounding structure so that the designated task can be completed.

[0082] Figure 25-27 The connector 114 includes a connector similar to Figure 22-24 The resilient arms 250 of the connector 114 run in the manner of the resilient portions 280. Figure 25-27 In the connector 114 of the embodiment of the present invention, the elastic portion 280 carries the tab 262 and is movable relative to the body 252 of the connector 114. Specifically, the elastic portion 280 is partially or completely limited by the portion 272 with reduced wall thickness, which allows limited movement of the elastic portion 280, preferably the movement is sufficient to allow the tab 262 to disengage from the recess or opening 264. The elastic portion 280 can be centrally located within the body 252 of the connector 114, so that the elastic portion 280 is completely surrounded by the body 252. Preferably, two elastic portions 280 are provided on opposite sides (e.g., top and bottom) of the body 252 of the connector 114.

[0083] Figure 28-30 Another respiratory therapy system 100 is shown that includes a flow generator 104 (eg, a CPAP device) and a breathing tube assembly 110 . Figure 28-30 The system 100 is similar to Figure 1-15These systems 100 are similar to each other, and therefore the same reference numbers are used to indicate corresponding or similar components, and only the significant differences relative to these previous systems 100 are described in detail. Any parts, components, or features that are not described in detail can be assumed to be the same or similar to corresponding parts, components, or features of any of the previous systems 100, or can have any other suitable configuration. Moreover, the system 100 may include Figure 1-15 Any optional features of these systems 100 (e.g., tabs 200) that are present in Figure 28-30 is not shown or described in the illustrated embodiments.

[0084] As in Figure 1-15 In the aforementioned system 100, the illustrated swivel elbow 116 facilitates, guides, constrains, or otherwise directs the bending of a portion of the tube 112, which provides crush protection and allows the position of the tube 112 to be varied relative to the CPAP device 104. Preferably, the bent portion of the tube 112 is proximate to or adjacent to the connector 114. The connector engaging portion 142 of the illustrated swivel elbow 116 engages the connector 114, and the tube engaging portion 144 of the swivel elbow 116 engages the tube 112. In the illustrated configuration, the connector engaging portion 142 and the tube engaging portion 144 are in the form of a strip that substantially or completely surrounds the circumference of the connector 114 and / or the tube 112.

[0085] The tube guide portion 146 extends between the connector engagement portion 142 and the tube engagement portion 144. Preferably, the tube guide portion 146 defines a curved surface 150 that guides the tube 112 into a curved orientation. As previously described, the angular offset between the axis of the connector engagement portion 142 and the axis of the tube engagement portion 144 can be approximately 90 degrees or as described previously with respect to FIG. Figure 1-15 Any angle described by these bends 116.

[0086] In the configuration shown, similar to the one shown in Figure 1-15 In the curved tube 116, the tube guide portion 146 only partially surrounds the tube 112. Specifically, the tube guide portion 146 shown surrounds approximately or exactly half of the circumference of the tube 112. Preferably, different from Figure 1-15 The elbow 116, Figure 28-30The tube guide portion 146 is at least partially positioned on the inside of the tube 112 relative to the bend (e.g., the center point of the bend radius) such that the tube guide portion 146 is positioned to support at least a portion of the inside curved surface of the tube 112. Such a configuration provides advantageous support and crush protection for the tube 112 and allows for rotational adjustment of the tube 112 relative to the CPAP device 104, while facilitating easier manufacture of the curved tube 116. Preferably, the tube guide portion 146 extends in a circumferential direction (relative to the tube 112) over the entire inside half of the tube 112. The illustrated tube guide portion 146 has a solid wall between its opposing (upper and lower) edges; however, the guide portion 146 may include one or more openings or windows therein (or be formed from one or more axial portions) to reduce material or adjust the flexibility of the tube. As described above, while the tube guide portion 146 is illustrated as being on the outside of the tube 112, in other configurations, it may be on the inside.

[0087] As described above, preferably, the swivel elbow 116 is rotatable about at least the longitudinal axis of the outlet 106 of the CPAP device 104 to allow the position of the tube 112 to be changed relative to the CPAP device 104. In the illustrated configuration, the swivel elbow 116 can rotate 360 ​​degrees or more about the axis of the outlet 106. That is, the swivel elbow 116 can rotate in a single direction for multiple rotations. However, in other configurations, the rotation of the swivel elbow 116 can be limited, as described above.

[0088] Figure 28-30 The swivel elbow 116 of the CPAP device 104 preferably also includes one or more features that facilitate assembly and / or removal of the breathing tube assembly 110 to and / or from the CPAP device 104. For example, the illustrated swivel elbow 116 includes a tab 290 of a suitable size and shape to allow a user to grasp the tab 290 to facilitate assembly of the breathing tube assembly 110 to or removal of the breathing tube assembly 110 from the CPAP device 104. Preferably, the tab 290 is located at or near the connector engagement portion 142 of the swivel elbow 116 or is otherwise oriented generally perpendicular to the longitudinal axis of the connection portion of the breathing tube assembly 110 adjacent to the outlet 106 of the CPAP device 104. Preferably, the tab 290 is oriented generally perpendicular relative to the outlet 106 of the CPAP device 104 and / or an axis of an outer surface surrounding or adjacent to the outlet 106.

[0089] In the illustrated configuration, the tab 290 is positioned on the outside of the swivel elbow 116 (outside of the bend) and / or on the side of the elbow 116 relative to the tube engaging portion 144. Advantageously, with such a configuration, a user can grasp both the tab 290 and the tube engaging portion 144 of the swivel elbow 166 to apply an even or balanced force to the tube assembly 110 that is generally aligned with the axis of the connector 114 and / or the outlet 106 to facilitate assembly or removal of the breathing tube assembly 110 to or from the CPAP device 104. The manufacture and assembly of the breathing tube 110, the assembly of the tube 110 to the CPAP (or other) device 104, and the operation of the system 100 are preferably the same as described above with reference to Figure 1-15 The described are substantially similar or identical.

[0090] Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprising," "including," and the like are to be construed in an inclusive sense (as opposed to an exclusive or exhaustive sense), that is, in the sense of "including but not limited to."

[0091] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that the prior art forms part of the common general knowledge in any country in the world.

[0092] The present invention may also be broadly stated to consist in the parts, elements and features mentioned or indicated in the specification of the present application, individually or collectively, and any or all combinations of two or more of said parts, elements or features.

[0093] Where in the foregoing description, reference has been made to integers or components having known equivalents thereof, these integers are incorporated herein as if individually set forth.

[0094] It should be noted that various changes and modifications to the currently preferred embodiments described herein will be clear to those skilled in the art. Such changes and modifications may be made without departing from the spirit and scope of the present invention and without diminishing its attendant advantages. It is therefore contemplated that such changes and modifications are included within the scope of the present invention.

Claims

1. A breathing tube assembly, the breathing tube assembly comprising a breathing tube and a connector, The breathing tube comprises: The first end, The second end, Internal passages, and an electric circuit integrated with the breathing tube, The connector is non-rotatably coupled to the first end of the breathing tube, and the connector includes: a flange configured to abut against an exterior surface of a respiratory therapy device when the connector is assembled to the respiratory therapy device, the flange carrying an electrical terminal in the form of a plug extending from the flange, the plug being arranged to connect to a port of the respiratory therapy device, and A shaft extends from the flange, the shaft defining an inner passage of the connector in communication with the inner passage of the breathing tube, the shaft being configured to be received within the outlet of the respiratory therapy device.

2. The breathing tube assembly according to claim 1, wherein: The electrical terminals are arranged to engage complementary electrical terminals of the respiratory therapy device to allow electrical signals and / or electrical energy to be transmitted between the respiratory therapy device and the breathing tube assembly.

3. The breathing tube assembly according to claim 1, wherein: The circuit is a heating circuit, a heating coil, a data circuit or any combination thereof.

4. The breathing tube assembly according to claim 1, wherein: The circuit is a helically wound heating coil.

5. The breathing tube assembly according to claim 4, wherein: The helically wound heating coil is enclosed within the wall of the breathing tube.

6. The breathing tube assembly of claim 1, wherein: The electrical terminal extends from the flange in the form of a plug arranged to connect to a port of the respiratory therapy device.

7. The breathing tube assembly according to claim 6, wherein: The length of the plug is from about 3 / 4 of the length of the shaft to about the same as the length of the shaft, or longer than the shaft.

8. The breathing tube assembly according to claim 6 or 7, wherein: The plug is parallel to and adjacent to the axis.

9. The breathing tube assembly of claim 1, wherein: The breathing tube includes a sensor at the second end to sense one or more parameters of the air flow.

10. The breathing tube assembly of claim 9, wherein: The sensor provides an output regarding one or more parameters of air flow to the respiratory therapy device via the circuit.

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