Fluid connector with face seal

Abstract

One form of the technology includes a fluid connector for delivering breathing gas from a respiratory pressure therapy device to a patient, the fluid connector including a first end having a first opening for delivering fluid flow, a sealing portion extending around the periphery of the first opening, and a latching portion; a second end having a second opening for receiving fluid flow, a sealing surface extending around the periphery of the second opening and configured to engage with the sealing portion to form a facial seal, and a complementary latching portion configured to engage with the latching portion.

Description

[0001] Cross-reference of related applications

[0002] This application is a divisional application of patent application No. 202010106262.1, filed March 8, 2016. Application No. 202010106262.1 is a divisional application of patent application No. 201680013439.5, filed March 8, 2016. This patent application claims the benefit of U.S. Provisional Application No. 62 / 130,813, filed March 10, 2015, and U.S. Provisional Application No. 62 / 281,773, filed January 22, 2016, each of which is incorporated herein by reference in its entirety. Technical Background 1.1 Technical Field

[0004] This technology relates to one or more of the detection, diagnosis, treatment, prevention, and improvement of respiratory-related disorders. This technology also relates to medical devices or equipment and their uses. This technology further relates to fluid connectors for use with such medical devices or equipment.

[0005] 1.2 Description of relevant technologies

[0006] 1.2.1 The human respiratory system and its disorders

[0007] The human respiratory system facilitates gas exchange. The nose and mouth form the airway entrance for the patient.

[0008] A range of breathing disorders are present. Some disorders can be characterized by specific events, such as respiratory arrest, insufficiency, and hyperventilation.

[0009] A range of treatments have been used to treat or improve conditions such as obstructive sleep apnea (OSA), Chern-Schwarz respiration (CSR), obesity-related hyperventilation syndrome (OHS), chronic obstructive pulmonary disease (COPD), neuromuscular disease (NMD), or chest wall disorders. Furthermore, these treatments can be used by other healthy individuals to prevent the development of breathing difficulties. However, these treatments have several drawbacks.

[0010] 1.2.2 Treatment

[0011] Continuous positive airway pressure (CPAP) therapy has been used to treat obstructive sleep apnea (OSA). The premise is that CPAP acts as an air splint and prevents upper airway obstruction by pushing the soft palate and tongue forward and away from the posterior oropharyngeal wall. Treatment for OSA with CPAP can be voluntary, so patients may choose not to comply if they find the device used to provide such treatment uncomfortable, difficult to use, expensive, or unsightly.

[0012] Non-invasive ventilation (NIV) provides ventilatory support to patients through the upper airway to help them breathe and / or maintain adequate oxygen levels in the body by performing some or all of the respiratory work. Ventilation support is delivered via a non-invasive patient interface. NIV has been used to treat CSR, OHS, COPD, MD, and chest wall disorders. In some forms, the comfort and effectiveness of these treatments can be improved.

[0013] Invasive ventilation (IV) provides ventilatory support for patients who are no longer able to breathe effectively on their own and can be delivered using a tracheostomy tube. In some forms, the comfort and effectiveness of these treatments can be improved.

[0014] 1.2.2.1 Patient Interface

[0015] A patient interface can be used to attach a breathing device to its wearer, for example, by providing an airflow into the airway. The airflow can be provided to the patient's nose and / or mouth via a mask, to the mouth via a tube, or to the patient's trachea via a tracheostomy tube. Depending on the treatment to be applied, the patient interface can form a seal with an area such as the patient's face, thereby facilitating the delivery of gas at a pressure sufficiently different from ambient pressure (e.g., a positive pressure of approximately 10 cmH2O relative to ambient pressure) to achieve the treatment. For other forms of treatment, such as oxygen delivery, the patient interface may not include a seal sufficient to deliver gas at a positive pressure of approximately 10 cmH2O into the airway.

[0016] Patient interfaces may include a sealing formation. The patient interface can be partially characterized according to the design intent of the sealing formation engaging with the face during use. These different types of patient interfaces can be given various names by their manufacturers, including nasal masks, full-face masks, nasal pillows, nasal sprays, and oronasal masks.

[0017] 1.2.2.1.1 Ventilation Technology

[0018] Some forms of treatment systems may include vents to allow for the flushing of exhaled carbon dioxide, such as in the patient interface. Vents can allow gas from the internal space of the patient interface (e.g., an air chamber) to flow to the outside of the patient interface, such as to the environment. Vents may include orifices through which gas can flow when a mask is used. Many of these vents are noisy. Others may become clogged during use and thus provide insufficient flushing. Some vents may disrupt the sleep of the patient's bed partner, for example, through noise or focused airflow.

[0019] 1.2.2.2 Respiratory Pressure Therapy (RPT) Device

[0020] Air pressure generators are known in a range of applications, such as industrial-scale ventilation systems. However, medical air pressure generators have specific requirements that are not met by more general air pressure generators, such as the reliability, size, and weight requirements of medical devices. Furthermore, even devices designed for medical use may have disadvantages related to one or more of the following: comfort, noise, ease of use, efficiency, size, weight, manufacturability, cost, and reliability.

[0021] One example of a specific requirement for certain RPT devices is noise.

[0022] Noise output level table for existing RPT devices (only one sample, measured in CPAP mode using the test method specified in ISO 3744 at 10 cmH2O).

[0023]

[0024]

[0025] One known RPT device for treating sleep-disordered breathing is the S9 Sleep Therapy System manufactured by ResMed. Another example of an RPT device is a ventilator.

[0026] RPT devices typically include a pressure generator, such as an electric blower or a compressed gas reservoir, and are configured to supply airflow to the patient's airway. In some cases, airflow to the patient's airway can be supplied under positive pressure. The outlet of the RPT device is connected via an air circuit to a patient interface such as those described above.

[0027] 1.2.2.3 Humidifier

[0028] Delivering an unhumidified airflow can lead to airway dryness. Using a humidifier with an RPT device and patient interface produces humidified gas, minimizing dryness of the nasal mucosa and increasing patient airway comfort.

[0029] Medical humidifiers are used to increase the humidity and / or temperature of airflow relative to ambient air when needed, typically in areas where patients may be sleeping or resting (e.g., in hospitals).

[0030] 1.2.3 Diagnostic and Treatment Systems

[0031] These treatments can be provided by treatment systems or devices. Systems and devices can also be used to diagnose conditions without treating them.

[0032] CPAP therapy is very effective in treating certain respiratory disorders, provided the patient meets the treatment criteria.

[0033] The treatment system may include a respiratory pressure therapy device (RPT device), an air circuit, a humidifier, a patient interface, and data management.

[0034] One component of a treatment system can be connected to another component of the system via an industry-standard connector. For example, a patient interface can be connected to an air circuit via a connector defined in ISO 5356-1. However, in this configuration, it may be difficult to determine whether a component is designed so that its optimal operating conditions are related to another component. As a result, the user may not be able to fully utilize the treatment system, where components such as RPT devices may be specifically designed for use with a particular set of patient interfaces.

[0035] Furthermore, the use of standard connectors in components can limit designers, as they must ensure compatibility with all other components that can be connected via standard connectors. Therefore, if designers may not be backward compatible with existing kits of connectable components on the market, it may discourage or even prevent them from improving the component.

[0036] If a custom connector is indeed used, it is preferably arranged such that accidental or unintended connections can be prevented between components using the custom connector and components using another connector.

[0037] Furthermore, in one or more aspects, existing connectors themselves may not be desirable. For example, connectors that engage purely through an interference fit (e.g., as defined in ISO 5356-1) may be difficult to engage and / or disengage because they may require significant force to overcome friction across the connection length. Such connectors may further fail to provide the user with clear indication of whether the connection has been adequately made to provide the intended treatment.

[0038] Therefore, there is a need for an improved connector that is identifiable as different from other connectors and preferably prevents accidental connection with components utilizing standard connectors. This improved connector can enable improved treatment systems comprising components designed to be used with each other. In turn, this can lead to improved delivery of treatment to the patient and increased rates of treatment compliance.

[0039] 2. Technical Overview

[0040] This technology aims to provide medical devices for diagnosing, improving, treating or preventing respiratory disorders, which have one or more of the following: improved comfort, cost, efficacy, ease of use and manufacturability.

[0041] The first aspect of this technology relates to devices for diagnosing, improving, treating, or preventing respiratory disorders.

[0042] Another aspect of this technology relates to methods for diagnosing, improving, treating, or preventing respiratory disorders.

[0043] One aspect of this technology in certain forms is used to provide methods and / or devices for improving patient compliance with respiratory therapy.

[0044] A first form of this technology includes a connector assembly having a compliant face seal between a first end and a second end, and a retaining mechanism for connecting the first end and the second end together.

[0045] A second form of the technology includes a fluid connector system for delivering respiratory gases from a respiratory pressure therapy device to a patient. The fluid connector system includes a first end having a first opening for fluid flow, a sealing portion extending around the periphery of the first opening, and a latching portion; a second end having an inner tube defining a second opening for fluid flow, a sealing surface extending around the periphery of the second opening and configured to engage the sealing portion to form a face seal; and an outer tube including a complementary latching portion configured to engage the latching portion and configured to be pressed into a cavity formed between the inner and outer tubes. The face seal forms a seal against respiratory gases traveling between the first and second openings, and the engagement between the latching portion and the complementary latching portion secures the first end to the second end.

[0046] A third form of the technology includes a system for providing respiratory therapy to a patient, the system comprising a respiratory pressure therapy device; an air circuit; a patient interface connected to the air circuit; and a unit for preventing the respiratory pressure therapy device from being connected to the air circuit using industry-standard connectors.

[0047] A fourth form of the technology includes a method of providing a fluid connection to deliver respiratory gas from a respiratory pressure therapy device to a patient, the method comprising latching a first end and a second end of the fluid connection; and engaging a facial seal around a first opening in the first end and around a second opening in the second end, wherein one of the first end and the second end corresponds to the respiratory pressure therapy device.

[0048] A fifth form of the present technology includes a first portion of a fluid connector system for delivering respiratory gases from a respiratory pressure therapy device to a patient. The first portion includes a connector portion having a first opening for fluid flow, a sealing portion extending around the periphery of the first opening, and a latching portion, wherein the sealing portion is configured to seal against a sealing surface extending around the periphery of a second opening to form a face seal with a second portion of the fluid connector system, and the latching portion is configured to latch with another latching portion of the second portion of the fluid connector system.

[0049] A sixth form of the technology includes a first portion of a fluid connector system for delivering respiratory gases from a respiratory pressure therapy device to a patient. The first portion includes a connector portion having a first opening for fluid flow, a sealing surface surrounding the periphery of the first opening, and a latching portion wherein the sealing surface is configured to receive the sealing portion extending around the periphery of a second opening to form a face seal with a second portion of the fluid connector system, and the latching portion is configured to latch with another latching portion of the second portion of the fluid connector system.

[0050] A seventh form of the present technology includes a fluid connector system for delivering respiratory gases from a respiratory pressure therapy device to a patient, the fluid connector system including a first end having a first internal portion for fluid flow and a first retaining portion; and a second end having a second internal portion for fluid flow and a complementary retaining portion configured to engage with the retaining portion, wherein the first internal portion and the second internal portion have a first shape in a plane perpendicular to the flow direction, the retaining portion and the complementary retaining portion have a second shape in a plane perpendicular to the flow direction, and the first shape and the second shape are different.

[0051] An eighth aspect of the technology includes a system for providing respiratory therapy to a patient, the system comprising a respiratory pressure therapy device; an air circuit; a patient interface connected to the air circuit, the patient interface being adapted to operate with the respiratory pressure therapy device; and a unit for ensuring that the patient interface adapted to operate with the respiratory pressure therapy device can be connected to the respiratory pressure therapy device to receive a delivery of inhalable gas therefrom, while a patient interface not adapted to operate with the respiratory pressure therapy device cannot be connected to the respiratory pressure therapy device to receive a delivery of inhalable gas therefrom.

[0052] A ninth form of the technology includes a fluid connector end for delivering a pressurized airflow for respiratory therapy to a patient, the fluid connector end comprising: an outer portion including a latching portion and a protruding portion, the latching portion including a protrusion configured to engage with a complementary recess; and an inner portion including a sealing surface defining an air path for delivering the pressurized airflow, wherein the sealing surface includes an annular surface for forming a face seal to deliver the pressurized airflow into the air path, and the protrusion is axially aligned with the sealing surface.

[0053] In an example of at least one of the first to ninth forms of the present technology, (a) the second end further includes a stabilizer located between the inner tube and the outer tube; (b) the stabilizer is at least partially formed of an elastomer; (c) the first end is connected to a respiratory pressure therapy device including a blower, and the second end is connected to a fluid conduit; (d) the sealing surface is flat; (e) the sealing surface is substantially perpendicular to the direction of fluid flow from the first end to the second end; (f) the sealing surface extends circumferentially around the second opening; (g) the sealing surface is formed on a flange extending radially from the inner tube; (h) the flange extends substantially perpendicular to the inner tube; (i) the inner tube extends beyond the flange in a direction toward the sealing portion; (j) when the complementary latch portion engages with the latch portion, The inner tube extends at least partially through the sealing portion; (k) the sealing portion is compliant in the engagement direction between the first end and the second end; (l) the sealing portion includes a truncated conical portion; (m) when the first end and the second end are joined, the truncated conical portion contacts the sealing surface to form a face seal; (n) the sealing portion includes a partially spherical surface; (o) when the first end and the second end are joined, the partially spherical surface contacts the sealing surface to form a face seal; (p) the sealing portion includes a bellows-like or partially bellows-like portion; (q) when the first end and the second end are joined, the bellows-like or partially bellows-like portion contacts the sealing surface to form a face seal; (r) when the first end and the second end are joined, the sealing portion is configured to be in contact with the latch portion and the interlocking portion. (s) The sealing portion engages the sealing surface before the latch portion engages; (t) the sealing portion is compliant in the radial direction of the axis defined by the engagement direction between the first end and the second end; (u) when there is a gap between the sealing portion and the sealing surface in a non-pressurized state, the sealing portion is configured to expand and engage the sealing surface due to internal pressure at the first end; (v) the contact between the sealing portion and the sealing surface compresses the sealing portion against the seal and against the airflow direction from the first opening to the second opening; (w) the compression of the sealing portion does not cause a significant compressive force; (x) the force required to compress the sealing portion is less than the force required to engage the latch portion with the complementary latch portion; (y) The force required to engage the latching portion is less than one-tenth of the force required to engage the complementary latching portion; (z) At least one of the sealing portion and the sealing surface includes a sufficient contact area between the sealing portion and the sealing surface to form a seal when the respective centers of the sealing portion and the sealing surface are misaligned; (aa) The second end includes an inner portion and an outer portion, and the inner portion is rotatably coupled to the outer portion; (bb) The inner portion includes a sealing surface; (cc) The inner portion is rigidly connected to the fluid conduit; (dd) The outer portion includes a complementary latching portion; (ee) The complementary latching portion includes a cantilever portion having a protrusion configured to engage the latching portion;(ff) The cantilever portion is configured to be pressed to engage or disengage the complementary latch portion from the latch portion, and to allow engagement or disengagement between the first end and the second end; (gg) The first end includes a travel limit that restricts the movement of the second end in the engagement direction between the first end and the second end; (hh) The travel limit is a flange surrounding the first opening, and the second end includes a stop surface configured to contact the flange; (ii) The latch portion restricts the movement of the second end in a direction opposite to the engagement direction, and the travel limit and the latch portion together define a distance of movement of the second end when the first end and the second end are engaged; (jj) The sealing portion is configured to seal against a sealing surface within the distance of movement, which is a non-zero distance; (kk) The sealing portion is configured to form a seal with the sealing surface after undergoing a predetermined amount of wear and / or creep within the fluid connector, using worst-case manufacturing tolerances; (ll) The fluid connector system is configured to provide a negligible pressure drop when air flows throughout the patient's respiratory cycle and at pressures between 4 cmH2O and 40 cmH2O; (mm) The first end is a female connector, and the second end is a male connector; (nn) The female and male connectors have non-circular profiles; (oo) The first end includes a port that is in fluid communication with the interior of the sealing portion and separate from a first opening and a second opening; (pp) The first and second openings are the interior of the tube; (qq) The first end connects to... The device is connected to a respiratory pressure therapy apparatus including a blower, and a second end is connected to an adapter for a fluid conduit connector; (rr) the fluid connector further includes an industry-standard fluid connector, wherein the industry-standard fluid connector is in fluid communication with a first opening and at an end opposite to a sealing portion; (ss) the respiratory pressure therapy apparatus includes a first portion of a fluid connector system, and an air circuit includes a second portion of the fluid connector system, the first and second portions of the fluid connector system being connected together to connect a patient interface to the air circuit, and wherein one of the first and second portions includes a non-circular male portion, and the other of the first and second portions includes a non-circular female portion. The circular male portion is configured to mate with the non-circular female portion when the first and second portions are connected; (tt) the first portion includes the male portion, and the second portion includes the female portion; (uu) the first and second portions are capable of being connected together in multiple mating orientations; (vv) the first and second portions are capable of being connected together in two mating directions; (ww) the male and female portions each include at least one flat portion and at least one curved portion in a plane perpendicular to the airflow direction from the respiratory pressure therapy device to the air circuit; (xx) the male and female portions include two opposing flat portions and two opposing curved portions in a plane perpendicular to the airflow direction from the respiratory pressure therapy device to the air circuit.(yy) One of the male and female portions includes at least one key, and the other of the male and female portions includes at least one slot, the at least one key being configured to engage with at least one slot when the male portion engages with the female portion; (zz) The fluid connector further includes an industry-standard fluid connector, wherein the industry-standard fluid connector is in fluid communication with the first opening and has a sealing surface opposite to the end; (aaa) The first shape is circular; (bbb) The second shape includes characteristics of both circles and squares; (ccc) The second shape includes two opposing flat portions and two opposing curved portions; (ddd) The first internal portion and the second internal portion One portion includes a first male portion, and the other of a first inner portion and a second inner portion includes a first female portion, the first male portion and the first female portion comprising a first inner portion shape, and one of a retaining portion and a complementary retaining portion includes a second male portion, and the other of a retaining portion and a complementary retaining portion includes a second female portion, the second male portion and the second female portion comprising a second shape; (eee) the inner portion further includes a radially outer surface configured to limit radial deflection of the latching portion; (fff) the radially outer surface is axially aligned with the sealing surface; (ggg) the outer portion further includes a slot; and / or (iii) the slot is an elongated shape.

[0054] One aspect of this technology is a portable RPT device that includes a fluid connector that can be carried by a person, for example, in a person's home.

[0055] Of course, the parts of each aspect can form sub-aspects of the present invention. In addition, the sub-aspects and / or aspects of the aspects can be combined in any way and also constitute other aspects or sub-aspects of the present invention.

[0056] Other features of the invention will become apparent from consideration of the information contained in the following detailed description, abstract, drawings and claims. Attached Figure Description

[0057] This technology is illustrated in the accompanying drawings by way of example rather than limitation, wherein like reference numerals denote similar elements, including: 3.1 Treatment System

[0058] Figure 1A A system is shown in which a patient 1000 wearing a patient interface 3000 via a nose pillow receives a positive-pressure air supply from an RPT device 4000. The air from the RPT device is humidified in a humidifier 5000 and delivered to the patient 1000 along an air circuit 4170. A bed companion 1100 is also shown.

[0059] 3.2 Respiratory System and Facial Anatomy

[0060] Figure 2AA schematic diagram of the human respiratory system is shown, including the nasal cavity and oral cavity, larynx, vocal cords, esophagus, trachea, bronchi, lungs, alveolar sacs, heart, and diaphragm.

[0061] 3.3 Patient Interface

[0062] Figure 3A A patient interface in the form of a nasal mask according to the present technology is shown.

[0063] 3.4RPT device

[0064] Figure 4A An RPT device of one form according to the present technology is shown.

[0065] Figure 4B This is a schematic diagram of the pneumatic path of one form of RPT device according to this technology. The upstream and downstream directions are indicated.

[0066] 3.5 Humidifier

[0067] Figure 5A An isometric view of one form of humidifier according to the present technology is shown.

[0068] 3.6 Fluid Connector

[0069] Figure 6A A side view of a fluid connector with a first end and a second end that mate with each other is shown.

[0070] Figure 6B A side cross-sectional view of a fluid connector with a first end and a second end that are disconnected from each other is shown.

[0071] Figure 6C A side cross-sectional view of a fluid connector having a first end and a second end mating with each other is shown.

[0072] Figure 6D A perspective view of the fluid connector is shown, in which the first end and the second end are separated from each other, and the interior of the first end is visible.

[0073] Figure 6E A cross-sectional view of a fluid connector with an additional fluid port is shown.

[0074] Figure 6F A fluid connector is shown, having a first end and a second end connected together, with the first end integrated into an RPT device.

[0075] Figure 6G A fluid connector is shown with a first end and a second end disconnected, and the first end integrated into an RPT device.

[0076] Figure 6HA perspective view of a fluid connector is shown, in which the first end and the second end are separated from each other, and the sealing surface of the second end is visible.

[0077] Figure 7A A perspective view of a fluid connector incorporating an RPT device, according to another example of the present technology, is shown.

[0078] Figure 7B The connector is shown to be disconnected. Figure 7A A perspective view of the fluid connector and RPT device.

[0079] Figure 7C It shows the way Figure 7A The cut-off cross section, in which most of the RPT device is omitted.

[0080] Figure 7D It shows the way Figure 7B The cut-off cross section, in which most of the RPT device is omitted.

[0081] Figure 7E It shows Figure 7A A perspective view of half of the fluid connector.

[0082] Figure 7F It shows Figure 7E An exploded view of half of the fluid connector.

[0083] Figure 7G A cross-section of a disconnected fluid connector according to an example of this technology is shown.

[0084] Figure 7H The connection is shown Figure 7G The cross-section of the fluid connector.

[0085] Figure 7I A perspective cross-section of a fluid connector according to another example of the present technology is shown.

[0086] Figure 7J A cross-section of a fluid connector according to another example of this technology is shown.

[0087] Figure 7K A cross-section of a fluid connector according to another example of this technology is shown.

[0088] Figure 7L A cross-section of a fluid connector according to another example of this technology is shown.

[0089] Figure 7M A cross-section of a fluid connector according to another example of this technology is shown.

[0090] Figure 7NA cross-section of the end of a fluid connector according to another example of the present technology is shown.

[0091] Figure 8A A seal for a fluid connector according to this technology is shown.

[0092] Figure 8B A seal for a fluid connector according to this technology is shown.

[0093] Figure 9 A seal for fluid connections and adjacent structures according to the present technology is shown.

[0094] 4. Specific implementation methods of this technology

[0095] Before describing the invention in further detail, it should be understood that the invention is not limited to the specific examples described herein, and the specific examples described herein may be modified. It should also be understood that the terminology used in this disclosure is for the purpose of describing the specific examples described herein and is not intended to be limiting. For example, terms such as first, second, and third are included to distinguish features in similar descriptions, but a feature indicated as a second feature in the specification may be listed as a first feature in the claims.

[0096] The following description is provided in relation to various instances that may share one or more common characteristics and / or features. It should be understood that one or more features of any instance may be combined with one or more features of another instance or other instances. Furthermore, in any instance, any single feature or combination of features may constitute a further instance.

[0097] 4.1 Treatment

[0098] In one form, the technology includes a method for treating respiratory distress, the method comprising the step of applying positive pressure to the inlet of the airway of a patient 1000.

[0099] In some embodiments of this technology, a positive pressure air supply is provided to the patient's nasal passages through one or both nostrils.

[0100] In some embodiments of this technology, mouth breathing is defined, restricted, or prevented.

[0101] 4.2 Treatment System

[0102] In one form, the technology includes a device or apparatus for treating respiratory disorders. The device or apparatus may include an RPT (Respiratory Pressure Treatment) device 4000 for supplying pressurized air to a patient 1000 via an air circuit 4170 leading to a patient interface 3000, for example in… Figure 1A As shown in the image.

[0103] 4.3 Patient Interface

[0104] A non-invasive patient interface 3000 according to one aspect of the present technology includes the following functional aspects: a sealing formation structure 3100, an inflation chamber 3200, a positioning and stabilizing structure 3300, and a connection port 3600 for connection to an air circuit 4170. In some forms, the functional aspects may be provided by one or more physical components. In some forms, a single physical component may provide one or more functional aspects. In use, the sealing formation structure 3100 is configured to surround an inlet to the patient's airway to facilitate the supply of positive pressure air to the airway.

[0105] 4.3.1 Ventilation openings

[0106] In one embodiment, the patient interface 3000 includes a vent 3400 configured and arranged to allow flushing of exhaled carbon dioxide.

[0107] One type of vent 3400 according to the present technology includes a plurality of holes, such as about 20 to about 80 holes, or about 40 to about 60 holes, or about 45 to about 55 holes.

[0108] Vent 3400 may be located in inflation chamber 3200. Alternatively, vent 3400 may be located in decoupling structure 3500, such as rotator 3510.

[0109] In some configurations, one or more vents may be located in other locations within the treatment system, such as discretely with the patient interface 3000.

[0110] 4.4RPT device

[0111] According to one aspect of the present technology, an RPT device 4000 includes mechanical and pneumatic components 4100, electrical components 4200, and is configured to execute one or more algorithms 4300. The RPT device may have an outer housing 4010, which is configured in two parts: an upper portion 4012 and a lower portion 4014. Furthermore, the outer housing 4010 may include one or more panels 4015. The RPT device 4000 includes a chassis 4016 that supports one or more internal components of the RPT device 4000. The RPT device 4000 may include a handle 4018.

[0112] The pneumatic path of the RPT device 4000 may include one or more air path objects, such as an inlet air filter 4112, an inlet silencer 4122, a pressure generator 4140 (e.g., a blower 4142) capable of supplying positive pressure air, an outlet silencer 4124, and one or more converters 4270, such as a pressure sensor 4272 and a flow sensor 4274.

[0113] One or more air path components may be located within a detachable, separate structure, referred to as pneumatic block 4020. Pneumatic block 4020 may be located within an outer housing 4010. In one embodiment, pneumatic block 4020 is supported by, or forms part of, a chassis 4016.

[0114] The RPT device 4000 may include a power supply 4210, one or more input devices 4220, a central controller 4230, a treatment device controller 4240, a pressure generator 4140, one or more protection circuits 4250, a memory 4260, a converter 4270, a data communication interface 4280, and one or more output devices 4290. Electrical components 4200 may be mounted on a single printed circuit board assembly (PCBA) 4202. In an alternative embodiment, the RPT device 4000 may include more than one PCBA 4202.

[0115] Another suitable example of an RPT device is described in U.S. Provisional Patent Application US 62 / 189483, the entire contents of which are incorporated herein by reference.

[0116] 4.4.1 Mechanical and pneumatic components of the RPT device

[0117] The RPT device may include one or more of the following components in an integral unit. In an alternative form, one or more of the following components may be configured as separate units.

[0118] 4.4.1.1 Pressure Generator 4140

[0119] In one form of this technology, the pressure generator 4140 for generating a positive pressure airflow or air supply is a controllable blower 4142. For example, the blower 4142 may include a brushless DC motor 4144 having one or more impellers housed in a volute. The blower may be able to deliver an air supply, for example, at a rate up to about 120 liters per minute and at a positive pressure ranging from about 4 cmH2O to about 20 cmH2O, or in other forms up to about 30 cmH2O. The blower may be as described in any of the following patents or patent applications, which are incorporated herein by reference in their entirety: U.S. Patent No. 7,866,944; U.S. Patent No. 8,638,014; U.S. Patent No. 8,636,479; and PCT Patent Application Publication No. WO2013 / 020167.

[0120] 4.4.1.2 Converter

[0121] The transducer can be located inside or outside the RPT device. An external transducer can be located on, for example, an air circuit such as a patient interface or be part of it. An external transducer can be in the form of a non-contact sensor, such as a Doppler radar motion sensor that transmits or transfers data to the RPT device.

[0122] 4.4.1.3 Air Circuit

[0123] According to one aspect of the present technology, the air circuit 4170 is a conduit or tube that is constructed and arranged in use to allow airflow between two components, such as the pneumatic block 4020 and the patient interface 3000.

[0124] Specifically, the air circuit 4170 can be fluidly connected to the outlet of the pneumatic block and the patient interface. The air circuit may be referred to as an air delivery tube. In some cases, a circuit with separate branches may be used for inhalation and exhalation. In other cases, a single branch is used.

[0125] In some forms, the air circuit 4170 may include one or more heating elements configured to heat the air in the air circuit, for example, to maintain or raise the temperature of the air. The heating element may be in the form of a heating wire circuit and may include one or more transducers, such as temperature sensors. In one form, the heating wire circuit may be helically wound around the axis of the air circuit 4170. The heating element may be connected to a controller such as a central controller 4230 or a humidifier controller 5250. An example of a control circuit 4170 including a heating wire circuit is described in U.S. Patent Application No. US / 2011 / 0023874, which is incorporated herein by reference in its entirety.

[0126] 4.5 Humidifier

[0127] 4.5.1 Overview of Humidifiers

[0128] In one form of this technology, a humidifier 5000 is provided (e.g., such as...). Figure 5A (As shown), to change the absolute humidity of the air or gas delivered to the patient relative to ambient air. Typically, the humidifier 5000 is used to increase absolute humidity and increase the temperature of the airflow (relative to ambient air) before it is delivered to the patient's airway.

[0129] 4.6 Fluid Connector

[0130] Figure 6AA side view of a fluid connector 9000 with a first end 9002 and a second end 9004 mating with each other is shown. A portion of a fluid conduit 9006, which may be part of an air circuit 4170, is connected to the second end 9004. Instead of the fluid conduit 9006, an adapter or connector may be provided to the fluid conduit. The outlet of the RPT device 4000 may include the second end 9004 in some form of the present technology.

[0131] The fluid connector 9000 can be configured to removably form a sealed connection to allow air to travel through it, such as from the RPT device 4000 to the patient interface 3000. The fluid connector 9000 may include multiple components, such as a first end 9002 and a second end 9004, which can be releasably connected to each other to make and / or disconnect a sealed connection.

[0132] The first end 9002 and the second end 9004 may form a pneumatic path therebetween via complementary sealing portions and be held together by complementary retaining portions, which may be separate portions of the complementary sealing portions. Therefore, as described in further detail elsewhere in this document, each of the first end 9002 and the second end 9004 may include a separate sealing portion and a retaining portion.

[0133] When sealing and retaining functions are performed by separate complementary parts, each of the sealing and / or retaining functions can be more easily optimized to address one or more of the competing design requirements. For example, in the case of a pair of complementary parts used to seal and retain two components, the formation of a tight seal may result in high friction, reducing the ease of joining and / or disconnecting the components.

[0134] Furthermore, while the availability of connection / disconnection is improved, the seals may be less robust, such as in cases where the two components may be subjected to forces and / or torques of varying directions and magnitudes. In the case of the fluid connector described in this document, a patient wearing the patient interface 3000 may move or prepare to sleep while asleep, causing the fluid connector to be pulled and / or twisted in various directions.

[0135] Therefore, one aspect of this technology relates to a fluid connector 9000, wherein a first end 9002 and a second end 9004 are connected or connectable to each other via complementary sealing portions and complementary retaining portions.

[0136] In one embodiment, the first end 9002 and the second end 9004 may include complementary sealing portions to form an air seal when joined. The air seal may be configured to form and maintain a sealing engagement to allow airflow through it. The sealing engagement may be sufficient to allow pressurized airflow through it, such as at pressures between 4 cmH2O and 40 cmH2O to provide respiratory therapy.

[0137] In some forms, the first end 9002 and the second end 9004 may include complementary portions to retain the first end 9002 and the second end 9004. The retaining portions may, for example, keep the first end 9002 and the second end 9004 sealed together by preventing accidental disengagement. The retaining portions may include a latching mechanism, as will be described in further detail in this document.

[0138] Figure 6B A cross-sectional view of a fluid connector 9000 is shown with the first end 9002 and the second end 9004 not connected to each other. In this view, a sealing portion 9008 is visible. The sealing portion 9008 can be formed of any material suitable for forming a seal in the air path of a device supplying breathing gas to a patient, such as silicone or thermoplastic elastomer (TPE). The sealing portion 9008 extends around a first opening 9010, which is shown as the interior of a first tube 9022. A latching portion 9012, which can be in the form of a recess, is provided in the first end 9002. The latching portion 9012 can be provided as... Figure 6B On the opposite side shown, either on one side or entirely around the periphery of the first end 9002. As shown, the latch portion 9012 is an undercut portion substantially perpendicular to the central axis of the first end 900. Other angles are possible depending on the required retaining force.

[0139] The second end 9004 includes a sealing surface 9016. The sealing surface 9016 may be formed circumferentially around a second opening 9018, shown as the interior of the second tube 9020. The sealing surface 9016 is shown as a substantially annular surface extending radially and vertically (i.e., at 90°) away from the second tube 9020. This may result in the sealing surface 9016 being substantially perpendicular to the direction of fluid flow from the first end 9002 to the second end 9004. However, the sealing surface 9016 may also extend outward at an angle, such that the sealing surface 9016 is at an oblique angle. For example, the sealing surface may be at an angle of 85°, 80°, 75°, 70°, 65°, 60°, 55°, 50°, or 45°, positive or negative, or any value in between. Figure 6BIt can be seen that the second tube 9020 may include a protrusion 9034 extending toward the sealing portion 9008 beyond the sealing surface 9016. This may cause the protrusion 9034 of the second tube 9020 to extend through the sealing portion 9008, such as... Figure 6C As shown. It should be understood that in some instances of this technology, the second tube 9020 does not need to include a protruding portion.

[0140] The protrusion can be configured to align the first end 9002 with the second end 9004 in one or more directions. The protrusion 9034 can be configured to insert into a guide portion 9038 on the first end 9002 as an inlet, aligning the second end 9004 with the first end 9002 in a radial (or transverse) direction. Thus, the first end 9002 and the second end 9004 can have a male / female relationship. Additionally, a stop 9030 can be provided to limit the stroke of the second tube 9020, for example, by abutting the protrusion 9034 under stroke limitation. Although the protrusion 9034 is shown as a tube, it can extend discontinuously around the circumference of the second end 9004, as if it were inside the seal created by the complementary sealing portions (sealing portion 9008 and sealing surface 9016). The protrusion can extend only partially through the sealing portion 9008, such as in a crenellated extension, tab, rib, etc.

[0141] use Figure 6C The illustrated configuration allows for a very small flow restriction in the internal flow path of the fluid connector 9000, defined by the first tube 9022, the second tube 9020, and the stop 9030, because the internal flow path is substantially the same as that of the fluid conduit 9006, for example, as evaluated in terms of cross-sectional shape and size. Therefore, the fluid connector 9000 can have a negligible pressure drop when air flows through it during the patient's respiratory cycle and at therapeutic pressures (e.g., between 4 cmH2O and 40 cmH2O).

[0142] The sealing portion 9008 may include a portion that contacts the sealing surface 9016 in any form, such as through tangential contact therebetween, to suit the formation of a face seal. As shown, the sealing portion 9008 contacts the sealing surface 9016 in a substantially frustoconical shape, similar to or partially bellows-shaped. Alternatively, a partially spherical or partially annular surface may be provided on the sealing portion 9008. With any of these shapes, the sealing portion 9008 may contact the sealing surface 9016 before the latching portion 9012 and the complementary latching portion 9014 are fully or uniformly partially engaged. Alternatively, even after the latching portion 9012 and the complementary latching portion 9014 are fully engaged, the sealing portion 9008 and the sealing surface 9016 may be gapped apart. In this case, internal pressure can move the sealing portion 9008 to contact the sealing surface 9016 and form a seal.

[0143] The sealing portion 9008 may include an elastic and compliant material that allows it to deform under load while retaining its original configuration when the load is removed. The sealing portion 9008 may be configured to readily deform under load to form and / or maintain a seal with the sealing surface 9016. In some forms, the sealing portion 9008 may include a membrane composed of silicone resin. The silicone membrane sealing portion 9008 may have sufficient flexibility to deform into contact with the sealing surface 9016 due to pressure caused by airflow. The silicone membrane sealing portion 9008 may additionally or alternatively have sufficient flexibility to maintain a sealing engagement with the sealing surface 9016 even when the undeformed configuration is compressed.

[0144] The proposed sealing portion 9008 is constructed to provide a seal relative to the mating direction between the first end 9002 and the second end 9004 (e.g., Figure 6B (From center to left) is compliant, and / or is compliant in the direction radial to the axis defined by the engagement direction between the first end 9002 and the second end 9004 (e.g., Figure 6B (The top and bottom of the middle).

[0145] The force required to compress the sealing portion 9008 (e.g., when compression is required to form and / or maintain a seal) may be low enough that it is not a significant compressive force. For example, the force required to compress the sealing portion 9008 may be less than the force required to engage the latch portion 9012 with the complementary latch portion 9014, such as overcoming any frictional forces when connecting the second end 9004 and the first end 9002. Alternatively, the force required to compress the sealing portion 9008 may be less than half the force required to engage the latch portion 9012 with the complementary latch portion 9014. Alternatively, the force required to compress the sealing portion 9008 may be less than one-tenth the force required to engage the latch portion 9012 with the complementary latch portion 9014. Therefore, in a configuration where the sealing portion 9008 contacts the sealing surface 9016 before the latch portion 9012 and the complementary latch portion 9014 are fully engaged, the user may not encounter a significant force that would be considered a full engagement. In some forms, any force caused by the compression of the sealing portion 9008 used to connect the second end 9004 and the first end 9002 may be small enough that the user is essentially unaware of it. That is, the force felt by the user in a configuration in which the sealing portion 9008 is removed from the first end 9002 can be substantially the same as in a configuration in which the sealing portion 9008 must be compressed for the connection.

[0146] The shape of the sealing portion 9008 according to this technology can provide a mating direction with the first end 9002 and the second end 9004 (e.g., Figure 6B (From center to right) A compliant seal. This allows the sealing portion 9008 to seal with the sealing surface 9016 even when there is a gap between the sealing portion 9008 and the sealing surface 9016 when the fluid connector 9000 is not pressurized. When pressure is applied to the interior of the fluid connector 9000 (e.g., to the first tube 9022), the sealing portion 9008 can expand toward and contact the sealing surface 9016 to form a seal. With this configuration, the user should not encounter any additional force when connecting the first end 9002 to the second end 9004 beyond the force required to engage the latch portion 9012 and the complementary latch portion 9014.

[0147] Therefore, the sealing portion 9008 and the sealing surface 9016 can be configured to form a seal while remaining unretained from each other. As a result, any latching or retaining function in the fluid connector 9000 can be separated from the sealing function.

[0148] Although the specific construction of the seal 9008 has been discussed above, other constructions are also possible. For example, some forms of the seal 9008 may include O-rings or gasket materials.

[0149] The sealing portion 9008 or the sealing surface 9016, or both, can be configured such that misalignment between the sealing portion 9008 and the sealing surface 9016 still results in a seal between the sealing portion 9008 and the sealing surface 9016. For example, the sealing portion 9008 and / or the sealing surface 9016 can be configured to form a seal between them while allowing for some degree of misalignment in the radial (or lateral) and / or axial directions.

[0150] For example, the sealing surface 9016 may include an annular shape (such as...) Figure 6H As shown, it is configured to form a face seal with the surface of the sealing portion 9008 in multiple radial locations. That is, the sealing portion 9008 and the sealing surface 9016 can form a seal therebetween, although the axes of the first tube 9022 and the second tube 9020 may be misaligned by, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, or 4 mm. In one embodiment, the sealing surface 9016 may include a sufficiently wide annular portion such that the sealing portion 9008 can form a seal thereto.

[0151] The second end 9004 also includes a complementary latch portion 9014. The complementary latch portion 9014 is shown as a cantilever hook, which includes an engaging protrusion that mates with or engages with the latch portion 9012. Like the latch portion 9012, the complementary latch portion 9014 can be provided as follows: Figure 6B On multiple (e.g., opposite) sides, or on a single side. The complementary latch portion 9014 can be as shown. Figure 6D The complementary latch portion 9014 can be pressed to engage or disengage it from the latch portion 9012, and allows engagement or disengagement between the first end 9002 and the second end 9004. While it is possible to provide more than two complementary latch portions 9014, doing so may make it unnecessarily difficult to disengage the second end 9004 from the first end 9002.

[0152] The latch portion 9012 and the complementary latch portion 9014 can be configured to provide audible or tactile feedback to the user when engaged or disengaged.

[0153] Together, the stop 9030 and the latch portion 9012 can define a predetermined distance (stroke) that the second end 9004 can move relative to the first end 9002, while the two ends are connected. For example, if the first axial distance between the stop 9030 and the latch portion 9012 is greater than the second axial distance between the end of the second tube 9020 and the engaging protrusion on the complementary latch portion 9014, the difference between the first and second axial distances will define a predetermined stroke that is not zero. If the first and second axial distances are equal, then no stroke will be possible. However, at least in terms of ease of manufacture, the benefits associated with non-zero stroke may exist, as non-zero stroke will allow for manufacturing tolerances that can reduce costs. Therefore, the sealing portion 9008 is configured with worst-case manufacturing tolerances and forms a seal with the sealing surface 9016 after a predetermined amount of wear and / or creep in the fluid connector 9000. The shape of the sealing portion 9008 described above allows the sealing portion 9008 to take this worst-case scenario into account.

[0154] like Figure 6B As shown, the second end 9004 may include an inner portion 9024 and an outer portion 9026 rotatably connected at an interface 9028. The inner portion 9024 may include a sealing portion 9008 and the outer portion 9026 may include a complementary latching portion 9014. As shown, the inner portion 9024 is rigidly or fixedly connected to the fluid conduit 9006 such that the inner portion 9024 and the fluid conduit 9006 can rotate together relative to the outer portion 9026. At least a portion of the fluid conduit 9006 may be overmolded onto the inner portion 9024 to form a rigid connection therebetween. In other forms, the fluid conduit 9006 may be friction-fitted or interference-fitted with the inner portion 9024 to form a rigid connection.

[0155] The inner portion 9024 and the outer portion 9026 can be configured such that one or more cavities, such as annular cavities, can be created during assembly. The cavities can facilitate rotation of the inner portion 9024 relative to the outer portion 9026 by reducing friction between them. Furthermore, the cavities can reduce the weight of the connector, thus providing an improved user experience. Additionally, the cavities can allow the latch portion 9014 to be pressed within for engagement / disengagement while maintaining a sealed air path through the connector.

[0156] like Figure 6DIdeally, the outer portion 9026 can have an outer contour with four curved sides at the corners and a smaller radius, the combination of which can produce an outer contour that is uniquely identifiable compared to a typical circular contour. The first end 9002 may include recesses of complementary shapes. Thus, the first end 9002 includes a female portion, and the second end 9004 includes a male portion. Including male and female portions of the forms described above, or any other non-standard shapes or configurations, may provide benefits.

[0157] First, fluid connectors 9000 that include non-standard shapes and / or constructions may not conform to industry standards (e.g., ISO 5356-1), which include the use of a circular socket with an introductory tapered shape, into which a cuff (e.g., rubber) is inserted. While it cannot be determined whether industry standards seem unintuitive, there may be benefits, as described in other sections of this document, in addressing the shortcomings of prior art connectors.

[0158] For example, the fluid connector 9000 can be used to connect an RPT device and a patient interface designed to operate optimally together. For instance, the RPT device may provide a lower flow rate that can only be utilized by a patient interface designed to operate at a lower flow rate (e.g., the patient interface may include a proprietary vent). The fluid connector 9000, which does not conform to industry standards, will then ensure that only the correct RPT device and patient interface are used. Second, particularly the outlines shown, the first and second ends 9004 can mate with each other only in a predetermined number of relative orientations (e.g., four). The four-sided shape of the invention also provides well-defined sides that are easy to identify and grip for actuating the complementary latch portion 9014. Third, non-standard shapes such as those described herein or others that allow the user to easily identify which end of the patient catheter 4170 is a complementary connector to another connector (such as the outlet of an RPT device).

[0159] Figure 6E Another example of this technology is shown, wherein port 9032 is included in the first end 9002. Port 9032 can be used to sense pressure downstream of the blower and outside the blower housing, such as by sensing pressure downstream of the RPT device. Port 9032 can be fluidly connected to the second end 9004 to determine the air pressure in the second opening 9018.

[0160] In one configuration, port 9032 can be in fluid communication with the interior of a second opening 9018, such as by forming a fluid connection with an opening inside the sealing portion 9008. The opening inside the sealing portion 9008 can then be in fluid communication with the second opening 9018 via a pressure connector 9036. Thus, when connected to each other, the first end 9002 and the second end 9004 can form two fluid connections between them. Port 9032 can provide the advantage of being able to measure pressure closer to the patient rather than within the RPT device. Measuring pressure closer to the patient can provide a more accurate measurement than a pressure measurement performed further from the patient, due to inherent pressure losses in the internal fluid flow and potential leakage along the entire air path from the blower to the patient.

[0161] Furthermore, the structure of the present invention allows the second end 9004 to rotate relative to the first end 9002 while still maintaining two fluid connections (i.e., one for delivering airflow and the other for measuring pressure). This may be advantageous in allowing the fluid conduit 9006 to rotate relative to the outer portion 9026, thereby reducing the torque applied to the fluid conduit and / or the outer portion 9026. Additionally, this configuration allows the user to connect the first end 9002 and the second end 9004 to each other in one of a plurality of rotational orientations while maintaining two fluid connections.

[0162] Figure 6F The first end 9002 is shown when the second end 9004 is connected and integrated into the RPT device 4000. Figure 6G The first end 9002, integrated into the RPT device 4000, is shown when the second end 9004 is disconnected.

[0163] Although the preceding description typically describes the two halves of the connector system together, such as the first end 9002 and the second end 9004, it should be understood that the description of either one can be considered in isolation.

[0164] Figure 7A-7I Some alternative or additional aspects of this technology are illustrated. Except as described below, the same reference numerals are used as above, and therefore repeated descriptions are omitted.

[0165] Figure 7A The first end 9002, which is integrated into the RPT device 4000 with the second end connected, is shown. Figure 7B It's similar, except that the second end 9004 is disconnected, which makes more aspects visible. For example... Figure 7B As can be seen, the first end 9002 differs from the above in that it includes a key 9040 and a secondary connector socket 9044. The second end 9004 differs in that it includes a slot 9042 and a flat plate 9046. These and other additional features are described in more detail below.

[0166] Key 9040 and slot 9042 are shown on opposite sides of fluid connector 9000 (i.e., 180° apart). This orientation limits the first end 9002 and the second end 9004, as only two mating orientations are possible (e.g., a first orientation and a second orientation, where one end of the first end 9002 and the second end 9004 is rotated 180° relative to the other). A single mating orientation can be achieved by providing two keys 9040 and slots 9042 and separating them by an angle less than 180°. A single mating orientation can also be achieved by including a single key 9040 and slot 9042. Of course, any number of mating orientations can be achieved by selecting at least a plurality of slots 9042. For example, three different mating orientations can be achieved by including a single key 9040 and three slots 9042. As will be understood, the selection of the number and relative orientation (e.g., the angle between them) of keys 9040 and slots 9042 can achieve multiple (if not infinite) combinations, which can be advantageous because it allows for the creation of unique fluid connectors while retaining other commonly used components (such as the sealing portion 9008). Of course, keys 9040 and slots 9042 can be switched or even mixed between the first end 9002 and the second end 9004.

[0167] The slot and key can be one of many possible shapes. In one form, the slot and key can be elongated shapes, such as those resembling mechanical keys used for alignment and / or holding in rotating machinery.

[0168] However, the illustrated bidirectional configuration may be advantageous, at least in some cases. For example, a bidirectional configuration can allow for easy alignment in the absence of visual obstruction or when the lights are off, so as not to disturb a bed partner. If the plate 9046 is included on the opposite side of the second end 9004 (e.g., between the thumb and forefinger) where the user naturally grasps it, the user can easily align the second end 9004 with the first end 9002 by touch. For example, if the first end is included in the RPT device 4000 as a configuration that allows the user to discern its orientation by touch, the two halves of the fluid connector 9000 can be oriented by touch. Of course, the plate 9046 can be omitted, and a similar effect can be achieved by the user grasping the complementary latch portion 9014.

[0169] exist Figures 7A to 7B In the specific arrangement shown, the dual-orientation construction ensures that the cantilever latch portion is positioned at an angle (e.g., 90 degrees) from the electrical connector 9048. As a result, the electrical connector 9048 can be placed directly near the fluid connector 9000 without adversely affecting access to the connection and / or disconnection.

[0170] like Figures 7C to 7DAs shown, the inner tube 9022 can extend outward to form an annular prism-shaped cavity in the first end 9002. The annular cavity may include a key 9040 therein to prevent engagement with other types of connectors belonging to components not part of the intended treatment system. As a result, suboptimal treatment can be prevented from being administered to the user, which could lead to the use of one or more of the following treatments: incorrect pressure, suboptimal flow rate, increased carbon dioxide, or anything else that might result in a suboptimal treatment regimen.

[0171] Although described here as flat, plate 9046 does not necessarily need to be flat in the strict sense. Rather, plate 9046 can be considered to be less curved or rounded than other parts of the second end 9004, and therefore flatter or closer to flat than the other parts.

[0172] The 9046 tablet offers other advantages. For example, such as... Figures 7A to 7D As shown, the plate 9046 can provide space or access for a secondary connector socket 9046 and / or a main electrical connector 9048. The secondary connector socket 9046 can be used with an electrical connector or fluid connector for use with the fluid connector 9000. For example, if a version of the fluid conduit 9006 includes electrical components (e.g., a heater and / or a sensor), the plate 9046 can provide space for an electrical connector at the secondary connector socket 9044 within the same footprint as the fluid connector 9000 without a secondary connector 9044. Similarly, similar advantages can be achieved if a secondary fluid connection (e.g., a pressure sensing or fluid sampling line) is required. Of course, a combined fluid and electrical connector can be located in the secondary connector socket 9044. Similar advantages can be provided for the main electrical connector 9048.

[0173] Even if plate 9046 is omitted, it may be advantageous to maintain the same relative orientation as shown, since this orientation will keep the complementary latch portion 9014 away from the secondary connector 9044 and the electrical connector 9048 (assuming one or both of these connectors are located on the RPT device 4000).

[0174] Figure 7N A cross-section of the second end 9004 according to another embodiment of the present technology is shown. Figure 7N An outer portion 9026, including a protrusion 9070, is shown. The protrusion 9070 can extend from a generally axial position of the sealing surface 9016.

[0175] The protrusion 9070 can be configured such that, in use, it will be inserted into the annular cavity in the first end 9002. When engaged with the first end 9002, the protrusion 9070 can engage the inner surface of the annular cavity to resist relative rotation between the first end 9002 and the second connector 9004. The distance by which the protrusion 9070 extends axially forward of the sealing surface 9016 can substantially match the distance by which the inner tube 9022 and the sealing portion 9008 extend outward from the stop 9030, such that when the end of the protrusion 9070 abuts the stop 9030, the sealing surface 9016 makes sealing contact with the sealing portion 9008. In this position, the sealing portion 9008 can be compressed to ensure a good seal. The forward extension distance of the protrusion 9070 can be selected to make it difficult to connect to the first end 9002, and the second end 9004 is not specifically designed to connect to the first end 9002, to help ensure that a patient interface designed only for use with an RPT device can be connected thereto.

[0176] Figure 7N A complementary latch portion 9014 axially aligned with the sealing surface 9016 is also shown. For example, the engagement protrusion of the complementary latch portion 9014 may be axially positioned in a straight line with the sealing surface 9016. The engagement protrusion may include an introductory bevel (such as...). Figure 7N (as shown), to improve the ease with which the second end 9004 can be inserted into the first end 9002.

[0177] In some forms, the inner portion 9024 may include a radially outer surface 9072 configured to engage the inner surface of the complementary latch portion 9014 when pressed. Therefore, the radially outer surface 9072 can provide a stop surface configured to limit radial deflection of the complementary latch portion 9014. The radially outer surface 9072 may be axially aligned with the sealing surface and / or the engaging protrusion.

[0178] As in Figure 7E and Figure 7F As shown in the optimal configuration, the internal portion 9024 includes a sealing surface 9016 at a first end. The internal portion 9024 may be connected to a pipe at a second end, such as via an end fitting 9050. The internal portion 9024 may include a stabilizer 9052 that maintains the position of the internal portion 9024 relative to the external portion 9026. Figure 7I Two stabilizers, 9052, are shown. Figure 7NA stabilizer 9052 is shown. The stabilizer 9052 can be made of an elastomer (e.g., a thermoplastic elastomer or silicone) to give it flexibility and elasticity. The stabilizer 9052 can be attached to the inner portion by overmolding or adhesive. Therefore, the stabilizer 9052 can allow some movement and tolerances between the inner portion 9024 and the outer portion 9026, while holding the inner portion 9024 in place relative to the outer portion 9026 and preventing contact between relatively rigid components that could cause undesirable rattling sounds. The stabilizer 9052 may also include a flat portion 9054 on radially opposite sides (in... Figure 7F Only one of the inner portion 9024 is visible in the middle, so as to rotatably position the inner portion 9024 relative to the outer portion 9026 (e.g., during assembly). The stabilizer 9052 may also be radially tapered, such that the stabilizer 9052 includes a thinner wall thickness as the radius increases outward.

[0179] The outer portion 9026 and / or the inner portion 9024 may include or be composed of relatively rigid components (such as polycarbonate or polypropylene). Furthermore, the inner surface of the annular cavity of the first end 9002 may be further composed of relatively rigid components. Therefore, a connection between the first end 9002 and the second end 9004 can be manufactured without causing troublesome high friction.

[0180] In some forms of this technology, the outer portion 9026 and the inner portion 9024 are discrete components joined together during assembly of the second end 9004. This may require manual assembly of the second end 9004, but the outer portion 9026 and the inner portion 9024 can be relatively easily manufactured, for example, using a molding process. In an alternative form of the technology, the second end 9004 can be formed by overmolding the inner portion 9024 onto the fluid conduit 9006. A disadvantage of this method is that the fluid conduit 9006 and the inner portion 9024 may need to pass through an opening in the second end 9004 during assembly.

[0181] The stabilizer 9052 may be positioned toward the end of the inner portion 9024, such as 5 mm, 10 mm or 15 mm from the end of the inner portion 9024, or 10%, 20% or 30% of the total length of the inner portion 9024 from one end.

[0182] The use of stabilizer 9052 makes it easier to reduce the weight of the second end 9004. That is, the inner part 9024 and the outer part 9026 can be radially separated by a gap, and their size and construction are predictably and stably maintained by stabilizer 9052. Therefore, the assembly of the second end 9004 can reliably form a connection and seal with the first end 9002.

[0183] The internal portion 9024 may include a boss 9056 (shown as a circumferential shoulder) adjacent to the end of the fluid conduit 9006. The boss 9056 may engage with the external portion 9026. The boss 9056 is located at the opposite end relative to the stabilizer 9052, such that the internal portion is constrained at both ends. A tapered shape 9058 may be included near the boss 9056. The tapered shape 9058 may simplify assembly with the fluid conduit 9006 and / or the end fitting 9050.

[0184] The outer portion 9026 may include an inner surface on which a covering molding 9060 is applied, allowing relative movement between the complementary latch portion 9014 and the surrounding portion of the outer portion 9026. The covering molding 9060 may allow for the prevention of water or other contaminant ingress and prevent or reduce air leakage and / or noise leakage. The covering molding 9060 may be provided anywhere there is a potential entry or exit path where noise and / or contamination exist. Other noise reduction features may be provided. For example, a circumferential wall (not shown) may be provided radially outward from the sealing portion 9008, which may reduce noise leakage through the sealing portion 9008.

[0185] Figure 7G and Figure 7H Another distinction is shown: the engagement between the first end 9002 and the second end 9004 is limited by a stop 9030a formed by the end of the slot 9042. Therefore, the stop 9030, as described above, can be omitted. However, in some forms of the art, it can be as follows... Figure 7G The stop 9030 described above is shown. In one embodiment, one or more components formed of a non-rigid material may be mounted to the stop 9030. For example, an annular component or one or more partially annular components may extend outward in a radial direction from the stop 9030. For example, the annular component may be made of silicone. These components mounted to the stop 9030 can help minimize the travel of the second end 9004 relative to the first end 9002 when the two ends are connected and can be done while accommodating manufacturing tolerances. Furthermore, if the components are configured such that the annular component needs to be compressed to engage the latch portion 9012 with the complementary latch portion 9014, this can help provide the user with a more detectable engagement indication (e.g., audible and / or tactile click) of the connection between the first end 9002 and the second end 9004, which may be desirable to help the user know when the ends are properly connected. Changing the degree to which the annular component extends outward from the stop 9030 can change the degree of detectable engagement indication.

[0186] Figure 7JAn alternative construction is shown that provides a seal between the first end 9002 and the second end 9004, wherein a conical sealing portion 9008a replaces the aforementioned sealing portion 9008. The conical sealing portion 9008a contacts and seals the inner diameter of the stop 9030 instead of the sealing surface 9016.

[0187] Figure 7K An alternative configuration for providing a seal between the first end 9002 and the second end 9004 is shown. Here, a flat sealing portion 9008b is provided between the two flanges 9062a, 9062b.

[0188] Figure 7L and Figure 7M An alternative construction for providing a seal is shown. Here, an external (outside the flow path) seal is provided by an outer conical sealing portion 9008c. This outer conical sealing portion 9008c can contact and thus seal a portion of the housing 9064 of the RPT device 4000 or the fluid conduit 9006 and / or any other convenient surface on the outside of the flow path.

[0189] like Figure 7E (or Figure 7N The second end 9004 shown includes a slot 9042, a protrusion 9070 extending beyond the sealing surface 9016, and an outer profile including both arcuate and flat portions. This combination of features strongly indicates to the user that the second end 9004 will not be compatible with standard ISO connectors. Therefore, it advantageously prevents the user from building the treatment system with suboptimal components.

[0190] Figure 8A This is a perspective view of the sealing portion 9008 as described above. Figure 8B The diagram illustrates an alternative modification to seal 9008 when the innermost boundary 9066 is non-uniform. A roughly sinusoidal boundary is shown, but any non-uniform boundary can be chosen. For example, a sawtooth, square, random, or any other non-circular boundary can be selected. Each of these boundaries can be functionally equivalent. Such a non-uniform boundary can be beneficial because leakage may occur if a tube (e.g., a standard ISO taper) is inserted into seal 9008. Leakage can be detected by RPT device 4000, and therefore RPT device 4000 can detect when an incorrect connection is used, issue a warning, and / or shut off. Alternatively, the leakage may be large enough that an incorrect connection will become ineffective. Leakage can be enhanced if peak 9066a is relatively more rigid and / or has a higher coefficient of friction than adjacent portions.

[0191] Figure 9An alternative leakage-inducing feature via rib 9068 is shown. Rib 9068 extends below the sealing portion 9008 and / or along the interior portion of the flow channel. Such ribs can provide an alternative or additional leakage path as described above, such as when a user attempts to form a seal with the interior of the first tube 9022.

[0192] Another way to achieve intentional leakage when attempting to engage one of the first end 9002 and the second end 9004 is to include a second seal designed to completely block the opening. For example, key 9040 may include an elastomeric portion (or any material suitable for sealing) that covers and / or seals the hole in the inner portion 9024. Therefore, even if a fully sealed connection is formed with the sealing portion 9008, leakage may occur that can be detected and cause the RPT device 4000 to react accordingly.

[0193] For each leakage situation associated with the aforementioned incorrect connection, the leakage can be designed to provide an audible warning to the user. Therefore, in addition to responding to leakage, the supplementary or alternative RPT device 4000 can provide an audible indication to the user that an incorrect connection is being used.

[0194] Another feature that reduces the possibility of incorrect connections is extending the pressure tap 9036 to the center of a flow path similar to a pitot tube. This may partially block the flow path, preventing the tube from being inserted far enough to form a seal. Alternatively, the pressure tap 9036 can be blocked, which can be detected by the RPT device 4000.

[0195] 4.7 Vocabulary

[0196] To achieve the purpose of disclosing the technology of this invention, one or more of the following definitions may be applied in certain forms of the invention. In other forms of the invention, alternative definitions may be applied.

[0197] 4.7.1 General Rules

[0198] Air: In some forms of this technology, air may be considered to mean atmospheric air, and in other forms of this technology, air may be considered to mean some other combination of breathable gases, such as oxygen-rich atmospheric air.

[0199] Environment: In some forms of the present invention, the term environment may have the following meanings: (i) outside the treatment system or the patient, and (ii) directly surrounding the treatment system or the patient.

[0200] For example, relative to the environment of the humidifier humidityThis could be the humidity of the air directly surrounding the humidifier, such as the humidity inside the patient's sleeping room. This ambient humidity can differ from the humidity outside the patient's sleeping room.

[0201] In another instance, the environment pressure It can be pressure directly around the body or pressure outside the body.

[0202] In some forms, the environment (e.g., acoustics) noise This can be considered as the background noise level in the patient's room, excluding noise generated by, for example, the RPT device or from the mask or patient interface. Ambient noise can be generated by sound sources outside the room.

[0203] Continuous positive airway pressure (CPAP) therapy: CPAP therapy is considered to be the application of air to the airway inlet at a continuously positive pressure relative to atmosphere. The pressure may remain approximately constant throughout the patient's respiratory cycle. In some forms, the pressure at the airway inlet will be slightly higher during expiration and slightly lower during inspiration. In other forms, the pressure will vary between different respiratory cycles, for example, increasing in response to an indication of partial upper airway obstruction and decreasing in the absence of such an indication.

[0204] Patient: A person, whether or not they have a respiratory illness.

[0205] Automatic Positive Airway Pressure (APAP) therapy: CPAP therapy in which the treatment pressure can be automatically adjusted, for example, from breath to breath, between minimum and maximum limits, depending on the presence or absence of an SDB event.

[0206] Vent: (noun) A structure that allows air to intentionally flow from the inside of a mask or duct into the ambient air, for example, to allow exhaled air to flush out.

[0207] 4.7.2 Respiratory and circulatory aspects

[0208] Breathing apnea: According to some definitions, breathing apnea is said to have occurred when airflow drops below a predetermined threshold for a sustained period (e.g., 10 seconds). Breathing apnea is also said to have occurred when, despite the patient's efforts, some obstruction of the airway prevents airflow. Central breathing apnea is said to have occurred when breathing apnea is detected due to reduced or absent breathing effort, even though the airway is open. Mixed breathing apnea occurs when reduced or absent breathing effort coincides with airway obstruction.

[0209] 4.7.3 RPT Device Parameters

[0210] Flow rate: The instantaneous volume (or mass) of air delivered per unit time. While flow rate and ventilation volume have the same volume or mass per unit time, flow rate is measured over a much shorter period of time. In some cases, a reference to flow rate will be a reference to a scalar quantity, i.e., a quantity that has only magnitude. In other cases, a reference flow rate will be a reference to a vector quantity, i.e., a quantity that has both magnitude and direction. In the case of what is called a signed quantity, the flow rate for the inspiratory portion of a patient's respiratory cycle can be normal, and therefore the flow rate for the expiratory portion of a patient's respiratory cycle is negative. Flow rate can be given by the symbol Q. 'Flow rate' is sometimes simply abbreviated to 'flow'. Total flow rate (Qt) is the air flow rate leaving the RPT device. Ventilation flow rate (Qv) is the air flow rate leaving the vent to allow exhaled gas flushing. Leakage flow rate (Ql) is the leakage flow rate from the patient interface system. Breathing flow rate (Qr) is the air flow rate received into the patient's respiratory system.

[0211] Leakage: The term leakage is considered to refer to undesirable airflow. In one instance, leakage can occur due to an incomplete seal between the mask and the patient's face. In another instance, leakage can occur in a bend in the conduit leading to the surrounding environment.

[0212] 4.7.4 Materials

[0213] Silicone resin or silicone elastomer: synthetic rubber. In this specification, reference to silicone resin refers to liquid silicone rubber (LSR) or molding silicone rubber (CMSR). One commercially available form of LSR is SILASTIC (included in the range of products sold under this trademark), manufactured by Dow Corning. Another manufacturer of LSR is Wacker Chemie. Unless otherwise specified, exemplary forms of LSR have a Shore A (or Type A) indentation hardness in the range of about 35 to about 45 as measured using ASTM D2240.

[0214] Polycarbonate: A transparent thermoplastic polymer, typically bisphenol A carbonate.

[0215] 4.8 Other Notes

[0216] This patent document contains a portion of copyrighted material. Because it appears in the patent office's patent documents or records, the copyright holder does not object to any person making a copy of this patent document or the patent disclosure, but otherwise retains all copyright rights.

[0217] Unless explicitly stated in the context and a numerical range is provided, it should be understood that every intermediate value between the upper and lower limits of the range, up to one-tenth of the lower limit unit, and any other value or intermediate value within the range are broadly included within the scope of this invention. The upper and lower limits of these intermediate ranges may be included independently within the intermediate range and within the scope of this invention, but are subject to any explicitly excluded boundaries within the range. When the range includes one or both of these boundaries, the range excluding one or both of those included boundaries is also included within the scope of this invention.

[0218] Furthermore, in cases where one or more values ​​described in the present invention are implemented as part of the present invention, it should be understood that such values ​​may be approximate unless otherwise stated, and such values ​​may be used to the extent permitted or required by the practical implementation of the technology for any suitable valid number of digits.

[0219] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. While any methods and materials similar to or equivalent to those described herein may be used in the practice or testing of the techniques of this invention, a limited number of exemplary methods and materials are described herein.

[0220] When a particular material is deemed preferably used for constructing a component, an obvious alternative material with similar properties is used as its substitute. Furthermore, unless otherwise stated, any and all components described herein are to be understood as being capable of being manufactured and therefore can be manufactured together or separately.

[0221] It must be noted that, unless the context clearly specifies otherwise, the singular forms “a” and “the” as used herein and in the appended claims include their plural equivalents.

[0222] All publications mentioned herein are incorporated by reference to disclose and describe the methods and / or materials that are the subject of those publications. The publications discussed herein provide only disclosures prior to the filing date of this application. None of this document should be construed as an admission by prior invention that the present invention was not entitled to pre-existing technology in such publications. Furthermore, the publication dates provided may differ from the actual publication dates, and independent verification may be required.

[0223] The terms “comprising” and “including” should be interpreted as meaning that an element, component or step referenced in a non-exclusive manner may be presented, used or combined with other elements, components or steps not explicitly referenced.

[0224] The main headings used in the detailed description are included for the reader's convenience only and should not be used to limit the subject matter of the invention as found throughout the disclosure or claims. These headings should not be used to interpret the scope or limitation of the claims.

[0225] Although the invention has been described with reference to specific embodiments, it should be understood that these examples are merely illustrative of the principles and applications of the invention. In some instances, proper nouns, terms, and symbols may imply specific details not required for practicing the invention. For example, although the terms "first" and "second" may be used, they are not intended to indicate any order unless otherwise specified, but rather to distinguish different elements. Furthermore, although the process steps in a method may be described or illustrated in a certain order, this order is not necessary. Those skilled in the art will recognize that this order can be modified, and / or aspects of the order can be performed simultaneously or even concurrently.

[0226] Therefore, it should be understood that various modifications can be made to the exemplary instances and other arrangements can be designed without departing from the spirit and scope of the present invention.

[0227] 4.9 List of Reference Symbols

[0228] 1000 patients

[0229] 1100 bed partners

[0230] 3000 patient interfaces

[0231] 3100 Sealing Formation

[0232] 3110 Sealing Flange

[0233] 3120 Support flange

[0234] 3200 Inflation Chamber

[0235] 3210 surrounding area

[0236] 3220 Edge

[0237] 3300 Structure

[0238] 3400 ventilation opening

[0239] 3500 Decoupling Structure

[0240] 3510 rotation

[0241] 3520 socket

[0242] 3600 connection port

[0243] 3700 Forehead Support

[0244] 3800 Anti-asphyxiation valve

[0245] 4000rpt device

[0246] 4010 Outer Housing

[0247] 4012 upper part

[0248] Part 4014

[0249] 4015 Panel

[0250] 4016 chassis

[0251] 4018 Controller

[0252] 4020 Pneumatic Block

[0253] 4100 Pneumatic Components

[0254] 4110 Air Filter

[0255] 4112 Inlet Air Filter

[0256] 4114 Exit Air Filter

[0257] 4122 Inlet silencer

[0258] 4124 Export Silencer

[0259] 4140 Pressure Generator

[0260] 4142 Blower

[0261] 4144 motor

[0262] 4170 Air Circuit

[0263] 4180 Oxygen Supplementation

[0264] 4200 Electrical Components 4202 Board Assembly PCBA

[0265] 4210 Power Supply

[0266] 4220 Input Device

[0267] 4230 Central Controller

[0268] 4232 Clock; 4240 Treatment device controller

[0269] 4250 Protection Circuit

[0270] 4260 Memory

[0271] 4270 Converter

[0272] 4272 Pressure Transmitter

[0273] 4272 Pressure Sensor

[0274] 4274 Flow Sensor

[0275] 4276 Motor Speed ​​Converter

[0276] 4280 Data Communication Interface

[0277] 4282 Remote external communication network; 4284 Local external communication network; 4286 Remote external device

[0278] 4288 Local External Device

[0279] 4290 Output Device

[0280] 4292 Display Driver

[0281] 4294 Monitor

[0282] 4300 Algorithm

[0283] 4310 Preprocessing Module

[0284] 4312 Pressure Compensation Algorithm

[0285] 4314 Ventilation outlet flow calculation algorithm; 4316 Leakage flow algorithm

[0286] 4318 Respiratory Flow Algorithm

[0287] 4320 Healing Engine Module

[0288] 4321 Phase Determination Algorithm

[0289] 4321 Fuzzy Phase Determination Algorithm

[0290] 4322 Waveform Determination Algorithm

[0291] 4323 Air Exchange Determination Algorithm

[0292] 4324 Inspiratory flow rate limit determined

[0293] 4325 Respiratory arrest / insufficiency confirmed

[0294] 4326 Snoring Determination Algorithm

[0295] 4327 Algorithm for Determining Airway Patency

[0296] 4328 Target Ventilation Determination Algorithm

[0297] 4329 Algorithm for Determining Treatment Parameters

[0298] 4330 Treatment Control Module

[0299] 5000 Humidifier

[0300] 5250 Humidifier Controller

[0301] 9000 Fluid Connector

[0302] 9002 First End

[0303] 9004 Second End

[0304] 9006 Fluid Conduit

[0305] 9008 Sealing Part

[0306] 9008a Conical sealing section

[0307] 9008b Flat sealing section

[0308] 9008c External conical seal section

[0309] 9010 First Opening

[0310] 9012 latch section

[0311] 9014 Complementary latch section

[0312] 9016 Sealing Surface

[0313] 9018 Second Opening

[0314] 9020 Second Tube

[0315] 9022 First Pipe

[0316] 9024 Internal Parts

[0317] 9026 External Part

[0318] 9028 interface

[0319] 9030 stop

[0320] 9030a stop

[0321] Port 9032

[0322] 9034 Extended portion

[0323] 9036 Pressure Fitting

[0324] 9038 Guide Section

[0325] 9040 key

[0326] 9042 slot

[0327] 9044 Secondary Connector Socket

[0328] 9046 Tablet

[0329] 9048 Main power connector

[0330] 9050 end fittings

[0331] 9052 stabilizer

[0332] 9054 Flat section

[0333] 9056 convex platform

[0334] 9058 taper

[0335] 9060 Overmolded Parts

[0336] 9062a flange

[0337] 9062b flange

[0338] 9064 housing

[0339] 9066 innermost boundary

[0340] 9066a peak

[0341] 9068 Ribs

[0342] 9070 Extended portion.

Claims

1. A first portion of a fluid connector system for delivering pressurized breathing gas from a respiratory pressure therapy device to a patient, the first portion comprising a connector portion having a first opening for fluid flow, a rigid sealing surface extending around the first opening, a retaining portion, and a protruding portion extending forward from or beyond the sealing surface. The sealing surface is configured to axially engage a resilient sealing portion extending around the second opening to form a face seal with the second portion of the fluid connector system. At least a portion of the protruding portion is configured to be received within the second portion at a location radially adjacent to the resilient sealing portion, and the retaining portion is configured to releasably engage with another retaining portion of the second portion of the fluid connector system. in, The protruding portion is configured to engage the inner surface of the annular cavity of the second portion during connection to resist relative rotation between the first portion and the second portion.

2. The first part of the fluid connector system according to claim 1, wherein the sealing surface is flat.

3. The first part of the fluid connector system according to claim 1, wherein the sealing surface extends substantially perpendicular to the direction of fluid flow.

4. A first portion of the fluid connector system of claim 1, wherein the connector portion comprises: An inner tube, the inner tube including the sealing surface; and an outer tube, the outer tube including the retaining portion spaced radially outward from the inner tube.

5. A first part of the fluid connector system according to claim 4, wherein the sealing surface is on a flange extending radially from the inner tube.

6. The first portion of the fluid connector system according to claim 4 or 5, wherein the outer tube includes the protruding portion extending forward from the sealing surface, and the protruding portion is configured to be received at least partially within the annular cavity of the second portion.

7. A first portion of the fluid connector system according to claim 4 or 5, wherein the inner tube includes a protrusion extending beyond the sealing surface, and the protrusion is configured to extend at least partially through the sealing portion when the retaining portion engages with another retaining portion of the second portion of the fluid connector system.

8. An air delivery pipe, comprising: A fluid conduit having a first portion of a fluid connector system according to any one of claims 1 to 7.

9. The air delivery conduit of claim 8, wherein the connector portion of the first portion is rigidly connected to the fluid conduit.

10. The air delivery conduit of claim 8, wherein the fluid conduit is overmolded to the connector portion of the first portion.

11. The air delivery conduit of claim 8, further comprising a fitting for connecting the fluid conduit to the first portion.

12. The air delivery pipe according to any one of claims 8 to 11, wherein the internal cross-section of the fluid conduit is substantially the same as the internal cross-section of the first opening of the first portion.

13. The air delivery conduit of claim 8, wherein the fluid conduit is rotatable relative to the first portion.

14. The air delivery tube of claim 8, further comprising a patient interface connected to the fluid conduit.

15. A first portion of a fluid connector system for delivering breathing gas from a respiratory pressure therapy device to a patient, the first portion comprising a connector portion having a first opening for fluid flow, a resilient sealing portion extending around the first opening, and a retaining portion. The sealing portion is configured to seal against a rigid sealing surface extending around the second opening to form a face seal with the second portion of the fluid connector system. The first portion is configured to receive at least a portion of the protruding portion of the second portion, the protruding portion of the second portion extending forward from or beyond the sealing surface at a location radially adjacent to the sealing portion within the first portion. The retaining portion is configured to releasably engage with another retaining portion of the second portion of the fluid connector system. in, The first portion includes an annular cavity having an inner surface configured to engage the protruding portion of the second portion during connection to resist relative rotation between the first portion and the second portion.

16. The first portion of the fluid connector system of claim 15, wherein the sealing portion is compliant in the engagement direction between the first portion and the second portion.

17. A first portion of the fluid connector system of claim 15, wherein the sealing portion comprises a truncated conical portion, a partially spherical surface, a bellows-like portion, and / or a partially bellows-like portion.

18. A first portion of the fluid connector system of claim 17, wherein the truncated conical portion, the partially spherical surface, the corrugated portion and / or the partially corrugated portion are configured to contact the sealing surface to form a face seal when the first portion and the second portion are engaged or partially engaged.

19. A first portion of the fluid connector system of claim 15, wherein the sealing portion is compliant in a direction radial to the axis defined by the engagement direction between the first portion and the second portion.

20. The first part of the fluid connector system of claim 15, wherein compression of the sealing portion does not cause significant compressive force.

21. The first part of the fluid connector system of claim 15, wherein the force required to compress the sealing portion is less than the force required to engage the retaining portion with the other retaining portion of the second part.

22. The first part of the fluid connector system of claim 15, wherein the force required to compress the sealing portion is less than half the force required to engage the retaining portion with the other retaining portion of the second part.

23. The first part of the fluid connector system of claim 15, wherein the force required to compress the sealing portion is less than one-tenth of the force required to engage the retaining portion with the other retaining portion of the second part.

24. A first portion of the fluid connector system of claim 15, wherein the first portion includes the annular cavity, the annular cavity being configured to receive at least a portion of the protruding portion of the second portion.

25. The first part of the fluid connector system of claim 15, wherein the sealing portion is formed of silicone resin or thermoplastic elastomer.

26. The first part of the fluid connector system of claim 15, wherein the sealing part is a silicone film.

27. A first portion of the fluid connector system according to any one of claims 15 to 26, wherein the sealing portion is configured to expand toward the sealing surface of the second portion and contact the sealing surface of the second portion.

28. A respiratory pressure therapy device, comprising: An airflow generator having the first portion of the fluid connector system according to any one of claims 15 to 27, and The airflow generator is configured to generate a positive pressure airflow.

29. The respiratory pressure therapy device of claim 28, wherein the airflow generator is configured to generate an airflow through the first opening of the first portion.

30. The respiratory pressure therapy device according to claim 28 or 29, wherein the airflow generator is configured to deform the sealing portion of the first part due to the pressure caused by the airflow.

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