Respiratory pressure therapy device

Abstract

To provide invasive ventilation (IV) that provides ventilatory support to patients that are no longer able to effectively breathe by themselves.SOLUTION: An apparatus for generating a supply of air at positive pressure for the amelioration or treatment of a respiratory disorder includes a first chamber, a second chamber, at least one inlet tube configured to allow ambient air to enter the first chamber, at least one flow tube configured to allow air to pass from the first chamber to the second chamber, and a blower configured to produce a flow of air at positive pressure. The blower is positioned in the first chamber and configured to receive air from the second chamber. The blower includes a housing configured to sealingly separate an air flow through an interior of the housing from the first chamber. The at least one inlet tube is axially separated from the at least one flow tube.SELECTED DRAWING: Figure 4C

Description

[Technical field]

[0001] 1 CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Application No. 62 / 189,483, each of which is incorporated by reference in its entirety herein.

[0002] 2. Technology Background 2.1 Technology field The present technology relates to one or more of the detection, diagnosis, treatment, prevention and amelioration of respiratory related disorders. The present technology also relates to medical devices or apparatus and uses thereof. [Background technology]

[0003] 2.2 Description of Related Art 2.2.1 The human respiratory system and its diseases The body's respiratory system facilitates gas exchange. The nose and oral cavity form the entrance to a patient's airways.

[0004] These airways contain a series of branching tubes that become narrower, shorter and more numerous the deeper they go into the lungs. The primary function of the lungs is gas exchange, allowing oxygen to enter the venous blood from the air and carbon dioxide to leave. The trachea divides into the right and left main bronchi, which further divide into the terminal bronchioles. The bronchi constitute the conducting airways and do not participate in gas exchange. The airways further divide into the respiratory bronchioles and finally into the alveoli. Gas exchange occurs in the alveolar region of the lungs, which is called the respiratory zone. See: "Respiratory Physiology", by John B. West, Lippincott Williams & Wilkins, 9th edition published 2011.

[0005] There is a range of respiratory diseases. Particular diseases can be characterized by particular manifestations such as apnea, hypopnea and hyperpnea.

[0006] A range of treatments are available to treat or ameliorate such conditions, and otherwise healthy individuals may also benefit from preventative treatments for respiratory disease, but these suffer from a number of deficiencies.

[0007] 2.2.2 Treatment Nasal continuous positive airway pressure (CPAP) therapy has been used in the treatment of obstructive sleep apnea (OSA). Its mechanism of action is that nasal continuous positive airway pressure acts as a pneumatic splint, for example by pushing the soft palate and tongue forward or backward against the posterior oropharyngeal wall, thereby preventing closure of the upper airway. Because treatment of OSA with CPAP therapy can be voluntary, patients may choose not to adhere to treatment if they perceive one or more of the following about the device used to deliver the treatment: uncomfortable, difficult to use, expensive, or aesthetically unappealing.

[0008] Non-invasive ventilation (NIV) provides ventilatory support to a patient through the upper airway to assist in breathing by performing some or all of the respiratory functions and / or to maintain adequate oxygen levels in the body. Ventilatory support is provided through a non-invasive patient interface. NIV is used to treat CSR and respiratory failure in forms such as OHS, COPD, MD, and chest wall disorders. In some forms, it can improve the comfort and effectiveness of these treatments.

[0009] Invasive ventilation (IV) provides ventilatory support to patients who can no longer breathe effectively on their own and may be provided using a tracheostomy tube. In some forms, the comfort and effectiveness of these treatments may be improved.

[0010] 2.2.3 Treatment system These therapies may be provided by a therapeutic system or device. Such systems and devices may also be used to diagnose conditions without treating them.

[0011] The treatment system may include a respiratory pressure therapy device (RPT device), an air circuit, a humidifier, a patient interface, and data management.

[0012] Another form of treatment system is a mandibular repositioning device.

[0013] 2.2.3.1 Patient Interface The patient interface may be used to provide the wearer with an interface to the respiratory appliance, for example by providing airflow to the airway entrance. Airflow may be provided via a mask to the nose and / or mouth, a tube to the mouth, or a tracheotomy tube to the patient's trachea. Depending on the therapy being applied, the patient interface may form a seal, for example with an area of ​​the patient's face, to facilitate gas delivery at a pressure of sufficient dispersion with ambient pressure for therapy to be performed (e.g., at a positive pressure of about 10 cmH2O relative to ambient pressure). In other forms of therapy, such as oxygen delivery, the patient interface may not include a seal sufficient to facilitate delivery of a gas supply to the airway at a positive pressure of about 10 cmH2O.

[0014] Certain other mask systems may be functionally inadequate in the field, for example masks that are purely decorative may not be able to maintain adequate pressure, mask systems used for underwater swimming or diving may be configured to protect against water intrusion from higher external pressures and not maintain internal air at pressures higher than ambient.

[0015] Certain masks may be impractical for use while sleeping (eg, when sleeping on one's side in bed with head on a pillow).

[0016] CPAP therapy is highly effective in treating certain respiratory conditions if the patient complies with the therapy. If the mask is uncomfortable or difficult to use, the patient may not comply with the therapy. Because patients are often encouraged to clean their masks regularly, if the mask is difficult to clean (e.g., difficult to assemble or disassemble), the patient may not be able to clean the mask, which may affect patient compliance.

[0017] For these reasons, patient interfaces for CPAP delivery during sleep form a distinct field.

[0018] 2.2.3.1.1 Sealing formations The patient interface may include a seal forming portion. Because the patient interface is in direct contact with the patient's face, the shape and configuration of the seal forming portion may have a direct impact on the effectiveness and comfort of the patient interface.

[0019] The patient interface may be characterized in part according to the design intent of where the seal-forming portion engages the face in use. In one form of patient interface, the seal-forming portion may include two sub-portions that engage each of the left and right nostrils. In one form of patient interface, the seal-forming portion may include a single element that encloses both nostrils in use. Such a single element may be designed to rest, for example, on the upper lip region and nasal bridge region of the face. In one form of patient interface, the seal-forming portion may include an element that encloses the oral cavity region in use, for example by forming a seal on the lower lip region of the face. In one form of patient interface, the seal-forming portion may include a single element that encloses both nostrils and the oral cavity region in use. These different types of patient interfaces may be known by various names such as nasal masks, full face masks, nasal pillows, nasal puffs, and oronasal masks by their manufacturers.

[0020] 2.2.3.1.2 Positioning and stabilization The seal-forming portions of patient interfaces used in positive air therapy experience corresponding forces from the air pressure that disrupt the seal, so a variety of techniques are used to position the seal-forming portions and maintain a seal against the appropriate portion of the face.

[0021] 2.2.3.2 Ventilation technology Some forms of patient interface systems may include a vent for pushing out exhaled carbon dioxide. The vent may allow flow from an interior space of the patient interface (e.g., a plenum chamber) to an exterior of the patient interface (e.g., ambient). The vent may include an orifice through which gas may flow when the mask is in use. Many such vents are noisy. Others may become blocked when in use, resulting in insufficient pushing. Some vents may disrupt sleep of the patient's 1000 co-sleeper 1100, for example, due to sound or airflow concentration.

[0022] ResMed Limited has developed several improved mask ventilation technologies, see International Patent Application Publication No. WO1998 / 034,665; International Patent Application Publication No. WO2000 / 078,381; U.S. Patent No. 6,581,594; U.S. Patent Application Publication No. US2009 / 0050156; U.S. Patent Application Publication No. 2009 / 0044808.

[0023] [Table 1]

[0024] [Table 2]

[0025] 2.2.3.3 Respiratory Pressure Therapy (RPT) Devices Air pressure generators are known in a wide range of applications (e.g., industrial-scale ventilation systems). However, air pressure generators for medical applications have specific requirements that cannot be met by more common air pressure generators (e.g., medical equipment reliability, size, and weight requirements). In addition, even devices designed for medical treatment may suffer from deficiencies related to one or more of the following: comfort, noise, ease of use, effectiveness, size, weight, manufacturability, cost, and reliability.

[0026] One example of a special requirement of a particular RPT device is acoustic noise.

[0027] [Table 3]

[0028] One known RPT device used to treat sleep disorder breathing is the S9 Sleep Therapy System (manufacturer: ResMed Limited). Another example of an RPT device is a ventilator. In the case of a ventilator (e.g., ResMed Stellar® series of adult and pediatric ventilators), it can provide support for invasive and non-invasive independent ventilation for patients for a range of conditions (including, but not limited to, NMD, OHS, and COPD).

[0029] The ResMed Elisee® 150 ventilator and ResMed VSIII® ventilators can provide invasive and non-invasive dependent ventilation support suitable for adult or pediatric patients for the treatment of multiple conditions. These ventilators provide volumetric and pressure ventilation modes with single or dual limb circuits. RPT devices typically include a pressure generator (e.g., a motorized blower or compressed gas reservoir) and are configured to deliver airflow to the patient's airway. In some cases, the airflow can be delivered at positive pressure to the patient's airway. The outlet of the RPT device is connected via an air circuit to a patient interface as described above.

[0030] A device designer may be presented with a myriad of choices. Often, design criteria conflict, making certain design choices unconventional or unavoidable. Furthermore, the comfort and effectiveness of a particular embodiment may be significantly affected by minor changes in one or more parameters. 2.2.3.4 Humidifier

[0031] Delivery of the airflow without humidification can lead to drying of the airway. When a humidifier is used with an RPT device and patient interface, humidified gas is produced, minimizing drying of the nasal mucosa and increasing comfort of the patient's airway. Additionally, in cooler climates, the application of warm air to the facial area surrounding the patient interface generally provides greater comfort than cool air. A range of artificial humidification devices and systems are known, but do not meet the special requirements of medical humidification.

[0032] Medical humidifiers are typically used when a patient is sleeping or resting (e.g., in a hospital) to increase the humidity and / or temperature of an air stream relative to the ambient air when necessary. Bedside medical humidifiers may be small. Medical humidifiers may be configured to only humidify and / or heat the air stream delivered to the patient, and not the patient's surroundings. For example, room-based systems (e.g., saunas, air conditioners, or evaporative coolers) may also humidify the air breathed into the patient's body, but these systems also humidify and / or heat the entire room, which may be uncomfortable for the occupants. Additionally, medical humidifiers may have more stringent safety constraints than industrial humidifiers.

[0033] Although a number of medical humidifiers are known, such medical humidifiers may suffer from one or more deficiencies, i.e., some of such medical humidifiers provide inadequate humidification and others are difficult or inconvenient for the patient to use.

[0034] 2.2.3.5 Data Management For clinical reasons, data may be obtained to determine whether a patient prescribed respiratory treatment is "compliant" (e.g., the patient follows a particular "compliance rule" for their RPT device). One example of a compliance rule for CPAP treatment is that the patient must use the RPT device for at least 4 hours per night for at least 21 days out of 30 consecutive days to be considered compliant. To determine patient compliance, the provider of the RPT device (e.g., a healthcare provider) may manually obtain data describing the patient's treatment with the RPT device, calculate the usage rate over a given period of time, and compare this to the compliance rule. Once the healthcare provider determines that the patient has used their RPT device in accordance with the compliance rule, the healthcare provider may notify a third party that the patient is compliant.

[0035] There may be other aspects of a patient's care that would benefit from communication of treatment data to third parties or external systems.

[0036] Existing processes for communicating and managing such data can be one or more of: costly, time consuming, and error prone. Summary of the Invention [Problem to be solved by the invention]

[0037] 3. Brief description of the technology The present technology relates to the provision of medical devices for use in the diagnosis, amelioration, treatment or prevention of respiratory disease, which medical devices have one or more of improved comfort, cost, effectiveness, ease of use and manufacturability. [Means for solving the problem]

[0038] A first aspect of the technology relates to devices for use in the diagnosis, amelioration, treatment or prevention of respiratory disease.

[0039] Another aspect of the present technology relates to methods for use in the diagnosis, amelioration, treatment or prevention of respiratory disease.

[0040] One aspect of the present technology in certain forms is to provide methods and / or devices that improve patient compliance with respiratory treatment.

[0041] One aspect of the present technology relates to RPT devices that are constructed and arranged to reduce noise output (e.g., while maintaining a relatively small size).

[0042] One aspect of the present technology relates to an RPT device that includes an inlet with multiple inlet tubes (e.g., arranged in an array to reduce noise output).

[0043] One aspect of the present technology relates to an RPT device including a first chamber, a second chamber, an inlet tube array for delivering air from an inlet to the first chamber, and a flow tube array for delivering air from the first chamber to the second chamber. In one embodiment, the RPT device includes a blower. The blower is constructed and configured to be disposed within the first chamber and to receive air from the second chamber. In one embodiment, the RPT device includes a flow sensor constructed and configured to measure a first pressure in the first chamber and a second pressure in the second chamber to determine an air flow rate. In one embodiment, the inlet tube array is axially spaced from the flow tube array and generally parallel to the flow tube array, but one or more tubes of the inlet tube array are not coaxial with one or more tubes of the flow tube array.

[0044] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of respiratory disorders. The apparatus includes a first chamber, a second chamber, at least one inlet tube constructed and configured to allow the ingress of ambient air into the first chamber, at least one flow tube constructed and configured to allow air movement from the first chamber to the second chamber, and a blower constructed and configured to generate an air flow at positive pressure. The blower is constructed and configured to be disposed within the first chamber and to receive air from the second chamber. The blower includes a housing constructed and configured to hermetically separate the air flow from the first chamber through an interior of the housing. The at least one inlet tube is axially spaced from the at least one flow tube.

[0045] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, the apparatus including at least one chamber and an inlet tube array including a plurality of inlet tubes constructed and arranged to allow the ingress of ambient air into the at least one chamber, at least one of the plurality of inlet tubes being positioned adjacent to another inlet tube such that the adjacent inlet tubes include at least one common sidewall.

[0046] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of respiratory disorders. The apparatus includes at least one chamber, an inlet tube array including a plurality of inlet tubes constructed and configured to allow the ingress of ambient air into the at least one chamber, and a flow tube array including a plurality of flow tubes constructed and configured to allow the egress of air from the at least one chamber. The inlet tube array is axially spaced apart from the flow tube array. The inlet tubes of the inlet tube array include axes that are disposed substantially parallel to the axes of the flow tubes of the flow tube array. At least one of the inlet tubes includes an axis that is axially offset from at least one of the flow tubes.

[0047] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of respiratory disorders, the apparatus including at least one chamber, a blower constructed and configured to generate an air flow at positive pressure, the blower being disposed downstream of the at least one chamber, a plate assembly including a base plate defining a wall of the at least one chamber, at least one tube constructed and configured to allow air entry into the at least one chamber, and a blower suspension supporting the blower.

[0048] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the improvement or treatment of respiratory disorders. The apparatus includes a housing including a blower, an upper portion and a lower portion defining at least one chamber, a first plate assembly including a support for the blower, at least one tube constructed and configured to allow air to enter the at least one chamber, a second plate assembly including a support for the blower, and at least one tube constructed and configured to allow air to exit the at least one chamber. The upper and lower portions are engageable or separable in a direction generally normal to the axis of the at least one tube of the first plate assembly.

[0049] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, the apparatus including at least one chamber, a blower constructed and arranged to generate an air flow at positive pressure, a first plate assembly including a base plate defining a wall of the at least one chamber and an outlet end suspension supporting the blower adjacent a blower outlet of the blower, and a second plate assembly including a base plate defining a wall of the at least one chamber and an inlet end suspension supporting the blower adjacent a blower inlet of the blower.

[0050] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, the apparatus including a chamber including an airflow path, a blower disposed within the chamber, a printed circuit board disposed external to the chamber, and a connector constructed and arranged to electrically connect the blower and the printed circuit board, the connector being positioned such that it passes through the chamber without being directly within the airflow path.

[0051] Another aspect of the present technology relates to a device for generating an air supply at positive pressure for the amelioration or treatment of respiratory disorders, the device includes a housing including an upper portion, a lower portion, and an intermediate portion between the upper portion and the lower portion, the lower portion and the intermediate portion defining a first chamber portion including an airflow path, the upper portion and the intermediate portion defining a second chamber external to the airflow path, a blower disposed within the first chamber, and a printed circuit board disposed within the second chamber.

[0052] Another aspect of the present technology relates to a plate assembly for an apparatus for generating an air supply at positive pressure for the amelioration or treatment of respiratory disorders, the plate assembly including a base plate constructed and arranged to define walls of a chamber, a plurality of tubes mounted to the base plate, the plurality of tubes constructed and arranged to allow air to enter and exit the chamber, and a blower suspension mounted to the base plate, the blower suspension constructed and arranged to support an end of a blower.

[0053] Another aspect of the present technology relates to an apparatus for generating an air supply at positive pressure for the improvement or treatment of a respiratory disorder. The apparatus includes a housing. The housing includes a housing inlet and a housing outlet, and internal components disposed to the housing. The internal components include a blower constructed and configured to generate at least an air flow at positive pressure. The housing and internal components cooperate to form an airflow path having a generally U-shaped configuration extending from the housing inlet to the housing outlet. In one embodiment, the blower includes a blower inlet and a blower outlet. The airflow path extends from the housing inlet to the blower inlet and from the blower outlet to the housing outlet. The housing includes an end portion providing both the housing inlet and the housing outlet. The blower is disposed along a leg of the U-shaped configuration (e.g., along an outlet leg of the U-shaped configuration extending from the housing outlet). The blower includes a U-shaped airflow path extending generally coaxially and / or substantially coplanar with the axis of the U-shaped outlet leg.

[0054] An aspect of certain forms of the present technology is a medical device that is easy to use, for example, for individuals without medical training, individuals with limited dexterity, or individuals with limited experience in using medical equipment of this type.

[0055] One form of embodiment of the present technology is a portable RPT device that can be carried by a person (eg, around the home).

[0056] Of course, some of the above aspects may form sub-aspects of the technology, and various of the sub-aspects and / or aspects may be combined in various ways to form further aspects or sub-aspects of the technology.

[0057] Other features of the present technology will become apparent in light of the information contained in the following detailed description, abstract, drawings, and claims. [Brief description of the drawings]

[0058] 4. Brief Description of the Drawings The present technology is illustrated by way of example and not by way of limitation in the accompanying drawings in which like reference symbols include like elements:

[0059] 4.1 Treatment system [Figure 1A] Figure 1A shows a system including a patient 1000 wearing a patient interface 3000. The system takes the form of nasal pillows and receives air at positive pressure supplied by an RPT device 4000. The air from the RPT device is humidified by a humidifier 5000 and travels along an air circuit 4170 to the patient 1000. A co-sleeper 1100 is also shown. [Figure 1B] 1B shows a system including a patient 1000 wearing a patient interface 3000. The system takes the form of a nasal mask and receives air at positive pressure supplied by an RPT device 4000. Air from the RPT device is humidified by a humidifier 5000 and travels along an air circuit 4170 to the patient 1000. [Figure 1C] 1C shows a system including a patient 1000 wearing a patient interface 3000. The patient interface 3000 takes a full face mask and receives a positive pressure air supply from an RPT device 4000. Air from the RPT device is humidified by a humidifier 5000 and travels along an air circuit 4170 to the patient 1000.

[0060] 4.2 Respiratory System and Facial Anatomy [Diagram 2] FIG. 2 shows an overview of the human respiratory system, including the nose and oral cavity, larynx, vocal folds, esophagus, trachea, bronchi, lungs, alveolar sacs, heart and diaphragm.

[0061] 4.3 Patient Interface [Diagram 3] FIG. 3 shows a patient interface in the form of a nasal mask in accordance with one form of the present technology.

[0062] 4.4 RPT Devices [Figure 4A] FIG. 4A is a perspective view of an RPT device in accordance with one form of the technology. [Figure 4B] FIG. 4B is another perspective view of the RPT device of FIG. 4A. [Figure 4C] FIG. 4C is a perspective view of the RPT device of FIG. 4A with portions of the intermediate cover and housing removed. [Figure 4D] FIG. 4D is another perspective view of the RPT device of FIG. 4A with portions of the intermediate cover and housing removed. [Figure 4E] FIG. 4E is a top view of the RPT device of FIG. 4A with portions of the intermediate cover and housing removed. [Figure 4F] FIG. 4F is an exploded view of the components of the RPT device shown in FIGS. 4C-4E. [Figure 4G] FIG. 4G is a further exploded view of the components of the RPT device shown in FIGS. 4C-4E. [Figure 4H] FIG. 4H is an exploded view of the RPT device shown in FIG. 4A. [Figure 4I] FIG. 4I is a cross-sectional view of the RPT device shown in FIG. 4A. [Figure 4J] FIG. 4J is an exploded cross-sectional view of the RPT device shown in FIG. 4A. [Figure 4K] FIG. 4K is a close-up of the RPT device of FIG. 4J. [Figure 4L]FIG. 4L is a close-up of the RPT device of FIG. 4J. [Figure 4M] FIG. 4M is a perspective view of a first plate assembly for an RPT device in accordance with one form of the present technology. [Figure 4N] FIG. 4N is a cross-sectional view of the first plate assembly shown in FIG. 4M. [Figure 4O] FIG. 4O is a perspective view of a second plate assembly for an RPT device in accordance with one form of the present technology. [Figure 4P] FIG. 4P is another perspective view of the second plate assembly shown in FIG. 4O. [Figure 4Q] FIG. 4Q is a top view illustrating an arrangement of first and second plate assemblies for an RPT device in accordance with one form of the present technology. [Figure 4R] FIG. 4R is a cross-sectional view through line 4R-4R of FIG. 4Q. [Figure 4S] FIG. 4S is a schematic diagram of an inlet tube array for an RPT device in accordance with one form of the present technology. [Figure 4T] FIG. 4T is a schematic diagram of an inlet tube array for an RPT device in accordance with one form of the present technology. [Figure 4U] FIG. 4U is a schematic diagram of an inlet tube array for an RPT device in accordance with one form of the present technology. [Figure 4V] FIG. 4V is a schematic diagram of an algorithm executed in an RPT device in accordance with one form of the present technology. [Figure 4W1] FIG. 4W1 is a perspective view of an external battery for powering an RPT device in accordance with one form of the present technology. [Figure 4W2] FIG. 4W2 is another perspective view of the external battery shown in FIG. 4W1. [Figure 4X1] FIG. 4X1 is a perspective view of the external battery of FIG. 4W1 engaged with the RPT device of FIG. 4A in accordance with one form of the present technology. [Figure 4X2]FIG. 4X2 is another perspective view of the external battery and RPT device shown in FIG. 4X1. [Figure 4Y1] FIG. 4Y1 is a perspective view showing the external battery of FIG. 4W1 engaging with the RPT device of FIG. 4A in accordance with one form of the present technology. [Figure 4Y2] FIG. 4Y2 is another perspective view of the external battery and RPT device shown in FIG. 4Y1.

[0063] 4.5 Humidifier [Figure 5A] FIG. 5A is an isometric view of a humidifier in accordance with one form of the present technology. [Figure 5B] FIG. 5B is an isometric view of a humidifier in accordance with one form of the present technology, showing the humidifier reservoir 5110 removed from the humidifier reservoir dock 5130. [Figure 5C] FIG. 5C is a schematic diagram of a humidifier in accordance with one form of the present technology.

[0064] 4.6 Respiratory waveform [Figure 6] FIG. 6 shows a typical respiratory waveform of a model human during sleep. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0065] 5 Detailed Description of Technical Examples Before describing the present technology in further detail, it should be understood that the present technology is not limited to the specific embodiments described herein, which may vary. It should also be understood that the terminology used in the present disclosure is for the purpose of describing the specific embodiments described herein, and is not intended to be limiting.

[0066] The following description is provided in conjunction with various embodiments that may share one or more common characteristics and / or features. It should be understood that one or more features of any one embodiment may be combined with one or more features of another embodiment or other embodiments. In addition, any single feature or combination of features in any of these embodiments may constitute an additional embodiment.

[0067] 5.1 Treatment In one form, the present technology includes a method of treating a respiratory disorder, the method including the step of applying positive pressure to an entrance to the airways of a patient 1000.

[0068] In certain embodiments of the present technology, a supply of air at positive pressure is provided to the patient's nasal passages via one or both nostrils.

[0069] In certain embodiments of the present technology, mouth breathing is restricted, limited or prevented.

[0070] 5.2 Treatment system In one form, the present technology includes an apparatus or device for the treatment of respiratory disorders. The apparatus or device may include an RPT device 4000 or 8000 that supplies compressed air to a patient 1000 via an air circuit 4170 to a patient interface 3000.

[0071] 5.3 Patient Interface As shown in Fig. 3, a non-invasive patient interface 3000 according to one aspect of the present technology includes the following functionalities: a seal forming structure 3100, a plenum chamber 3200, a positioning and stabilizing structure 3300, an air vent 3400, a form of connection port 3600 for connection to an air circuit 4170, and a forehead support 3700. In some forms, the functionalities may be provided by one or more physical components. In some forms, a physical component may provide one or more functionalities. In use, the seal forming structure 3100 is positioned to surround an entrance to the patient's airway to facilitate the supply of air at positive pressure to the airway.

[0072] 5.3.1 Closed formation structure In one form of the present technology, the seal forming structure 3100 provides a seal forming surface and may further provide a cushioning function.

[0073] A seal-forming structure 3100 according to the present technology may be constructed from a material that is soft, flexible and resilient (eg, silicone).

[0074] In one form, the seal-forming portion of the non-invasive patient interface 3000 includes a pair of nasal puffs or nasal pillows, each constructed and arranged to form a seal with a respective nostril of the patient's nose.

[0075] In one form, the non-invasive patient interface 3000 includes a seal-forming portion that forms a seal over the upper lip area (ie, upper lip) of the patient's face.

[0076] In one form, the non-invasive patient interface 3000 includes a seal-forming portion that forms a seal on the chin area of ​​the patient's face.

[0077] 5.3.2 Plenum chamber The plenum chamber 3200 has a perimeter with a shape that is complementary to the surface contour of an average human face in the area where a seal is formed in use. In use, the peripheral edge of the plenum chamber 3200 is positioned in close proximity to the adjacent surface of the face. Actual contact with the face is provided by the seal forming structure 3100. The seal forming structure 3100 may extend around the entire perimeter of the plenum chamber 3200 in use. 5.3.3 Positioning and stabilizing structures

[0078] The seal-forming structure 3100 of the patient interface 3000 of the present technology may be held in a sealed position by the positioning and stabilising structure 3300 in use.

[0079] In one form of the present technology, a positioning and stabilizing structure 3300 is provided that is configured to be worn by a patient while sleeping. In one embodiment, the positioning and stabilizing structure 3300 has a low profile or cross-sectional thickness to reduce the perceived or actual bulk of the device. In one embodiment, the positioning and stabilizing structure 3300 includes at least one strap having a rectangular cross-section. In one embodiment, the positioning and stabilizing structure 3300 includes at least one flat strap.

[0080] In one form of the present technology, the positioning and stabilizing structure 3300 includes a strap constructed from a laminate of a fabric patient-contacting layer, a foam material inner layer, and a fabric outer layer. In one form, the foam material is porous to allow moisture (e.g., sweat) to pass through the strap. In one form, the fabric outer layer includes a loop material that engages with a hook material portion.

[0081] In certain forms of the present technology, the positioning and stabilizing structure 3300 includes stretchable (e.g., stretchable with elasticity) straps. For example, the straps can be configured to be tensioned in use to direct a force that seals the cushion against a portion of the patient's face. In one embodiment, the straps can be configured as ties.

[0082] In certain forms of the present technology, the positioning and stabilizing structure 3300 includes straps that are bendable, e.g., non-rigid. An advantage of this embodiment is that the straps are more comfortable when the patient lies down to sleep.

[0083] 5.3.4 Ventilation In one form, the patient interface 3000 includes a vent 3400 constructed and arranged to allow for the expulsion of exhaled gases (eg, carbon dioxide).

[0084] A vent 3400 in one form according to the present technology includes a plurality of holes (eg, about 20 to about 80 holes, or about 40 to about 60 holes, or about 45 to about 55 holes).

[0085] The vent 3400 may be disposed within the plenum chamber 3200. Alternatively, the vent 3400 is disposed within a non-interlocking structure (e.g., a swivel).

[0086] 5.3.5 Decoupling structure(s) In one form, the patient interface 3000 includes at least one non-interlocking structure (eg, a swivel or ball socket).

[0087] 5.3.6 Connection Ports The connection port 3600 allows connection to the air circuit 4170 .

[0088] 5.3.7 Forehead support In one form, the patient interface 3000 includes a forehead support 3700.

[0089] 5.3.8 Anti-asphyxiation valves In one form, the patient interface 3000 includes an anti-asphyxiation valve.

[0090] 5.3.9 Ports In one form of the present technology, the patient interface 3000 includes one or more ports that allow access to the volume within the plenum chamber 3200. In one form, this allows a clinician to provide supplemental oxygen. In one form, this allows a characteristic of the gas (e.g., pressure) within the plenum chamber 3200 to be directly measured.

[0091] 5.4 RPT Devices An RPT device according to one aspect of the present technology includes mechanical, pneumatic and electrical components and is configured to execute one or more algorithms.

[0092] 4A-4R show an RPT device 8000 according to one embodiment of the present technology. As shown, the RPT device 8000 includes an outer housing 8010 including an upper or top housing portion 8012, a lower or bottom housing portion 8014, a first end 8016 including a housing inlet 8018 and a housing outlet 8020, and a second end 8022 providing an end cover including a face plate 8024.

[0093] The housing 8010 supports and / or encloses the internal components of the RPT device 8000 (e.g., a blower 8030, a mid-cover 8040, a first plate assembly 8050, a second plate assembly 8060, and a printed circuit board assembly (PCBA) 8070 including a main printed circuit board (main PCB) 8072 and a second printed circuit board (second PCB) 8074).

[0094] The housing 8010 and the internal components of the RPT device 8000 cooperate to form a pneumatic airflow path or pneumatic block that extends from the housing inlet 8018 to a blower inlet 8032 of the blower 8030 and from a blower outlet 8034 of the blower 8030 to the housing outlet 8020.

[0095] In one embodiment, the housing and the internal components cooperate to form an airflow path having a generally U-shaped shape extending from the housing inlet to the housing outlet. For example, the U-shaped airflow path may include an inlet leg extending from the housing inlet, an outlet leg extending from the housing outlet, and a connecting leg interconnecting the inlet leg and the outlet leg. In one embodiment, the inlet leg and the outlet leg are generally parallel to each other. In one embodiment, the blower is disposed along a leg of the U-shaped shape (e.g., along the outlet leg of the U-shaped shape extending from the housing outlet). In one embodiment, the blower includes an axis generally coaxial with an axis of the outlet leg of the U-shaped shape. In one embodiment, the U-shaped airflow path extends substantially in the same plane.

[0096] The RPT device 8000 is constructed and structured to reduce the noise output of the RPT device 8000 while maintaining a relatively small size.

[0097] In the illustrated embodiment, the RPT device 8000 provides two chambers (i.e., a first chamber 8001 and a second chamber 8002). The first chamber 8001 is relatively large compared to the second chamber 8002. As illustrated, a blower 8030 is supported within the first chamber 8001 and receives air at a blower inlet 8032 from the second chamber 8002 (i.e., the blower and its blower inlet disposed downstream of the chamber). The first plate assembly 8050 and the second plate assembly 8060 define at least a portion of the first chamber 8001 and the second chamber 8002, and the first plate assembly 8050 and the second plate assembly 8060 include blower suspensions 8054 and 8064, respectively. The blower suspensions 8054 and 8064 support the blower 8030 within the first chamber 8001 and seal airflow from the interior of the blower 8030 through the first chamber 8001. Additionally, the first plate assembly 8050 and the second plate assembly 8060 each include at least one tube (e.g., the inlet tube array 8052 and the flow tube array 8062, respectively) such that air enters and exits the first chamber 8001 through the at least one tube to reduce noise.

[0098] In an embodiment best shown in FIG. 4E, the airflow path of the RPT device 8000 is constructed and arranged such that air enters the housing 8010 via the housing inlet 8018, passes through an inlet tube array 8052 provided by the first plate assembly 8050, and flows into a first chamber 8001. The first chamber 8001 receives air from the inlet tube array 8052 and delivers it to a flow tube array 8062 provided to a second plate assembly 8060. It passes through the flow tube array 8062 and flows into a second chamber 8002. The second chamber 8002 receives air from the flow tube array 8062 and delivers it to a blower inlet 8032 of the blower 8030. Airflow passes through blower 8030 such that an air flow at positive pressure is provided to blower outlet 8034 of blower 8030 , and this pressurized air exits housing 8010 via housing outlet 8020 .

[0099] In one example, a flow sensor may be provided to the RPT device 8000 and constructed and arranged to measure a first pressure in the first chamber 8001 and a second pressure in the second chamber 8002 to determine an air flow rate. The first pressure and the second pressure may be used to determine a flow rate based on the configuration of the flow tube array 8062 (e.g., pressure drop and / or aerodynamic impedance).

[0100] 5.4.1 RPT Device Mechanical and Pneumatic Components The RPT device may include one or more of the following components in an integral unit: In the alternative, one or more of the following components may be disposed as their own separate units.

[0101] 5.4.1.1 Housing As best shown in FIGS. 4H-4K, the upper housing portion 8012 of the housing 8010 includes a first portion or base mold 8012A constructed from a relatively hard material (e.g., polypropylene) and a second portion or overmold 8012B constructed from a relatively soft material (e.g., thermoplastic elastomer (TPE) or silicone) and applied (e.g., by overmolding) to the first portion 8012A. In the illustrated embodiment, the overmold 8012B is applied to an exterior surface of the base mold 8012A, however, it should be understood that the overmold 8012B may be applied to an interior and / or exterior surface of the base mold 8012A. The softness of the overmold 8012B may provide a desirable tactile feel to a user of the RPT device 8000. The overmold 8012B may include a highly damping material that provides damping properties for improved impact resistance and reduced wall radiated noise.

[0102] As best shown in Figures 4A, 4B, 4H, 4J and 4K, the upper housing portion 8012 includes an on / off or power button 8003 and a wireless (e.g., Bluetooth) connection button 8004, each of which are constructed and configured to interact with the PCBA 8070. However, it should be understood that the RPT device 8000 may include additional and / or alternative input devices for a user to interact with the device (e.g., one or more buttons, switches, dials, touch screen).

[0103] In the illustrated embodiment, as best seen in Figures 4H, 4J, and 4K, base mold 8012A provides grooves around the sides of button portion 8003A that allow button portion 8003A to flex relative to base mold 8012A in a cantilever button portion 8003 of power button 8003. Overmold 8012B provides button portion 8003B, which includes raised portions of power button 8003, and grooves in the grooves around the sides of button portion 8003A. The raised portions and grooves of button portion 8003B provide a soft feel and grip and spring (button return) force for ease of use. For the wireless (Bluetooth®) connection button 8004, a base mold 8012A provides an opening 8004A and an overmold 8012B provides a soft feel for ease of use and a button area 8004B for grip and spring (button return) force.

[0104] The lower housing portion 8014 of the housing 8010 includes a first portion or base mold 8014A constructed of a relatively hard material (e.g., polypropylene) and a second portion or overmold 8014B constructed of a relatively soft material (e.g., TPE or silicone) applied (e.g., by overmolding) to the first portion 8014A. In the illustrated embodiment, the overmold 8014B is applied to the exterior surface of the base mold 8014A, but it should be understood that the overmold 8014B may be applied to the interior and / or exterior surface of the base mold 8014A. The softness of the overmold 8012B may provide a desirable tactile feel to a user of the RPT device 8000. The overmold 8014B may include a highly damping material to improve impact resistance and provide damping properties for wall radiated noise reduction.

[0105] As best shown in Figures 4F, 4G and 4L, the lower housing portion 8014 includes an interior slot 8015A (e.g., formed by spaced apart sidewalls) and a first plate assembly 8050 and an interior slot 8015B (e.g., formed by spaced apart sidewalls). The interior slot 8015A is constructed and configured to receive the first plate assembly 8050 along one edge thereof. The interior slot 8015B is constructed and configured to receive and support the second plate assembly 8060 along its other edge.

[0106] An internal blower support (e.g., internal rib 8017) is constructed of a relatively soft, highly damping material (e.g., TPE or silicone) and is provided (e.g., by overmolding) to lower housing section 8014. See, e.g., FIG. 4F and FIG. 4I. Internal rib 8017 is axially spaced between slots 8015A and 8015B and is constructed and arranged to at least partially surround blower 8030 to provide support, impact resistance and / or damping properties for blower 8030. One or more additional internal blower supports (e.g., additional ribs) may be provided at other locations on the housing, e.g., to provide impact resistance and / or damping properties. It is contemplated that the internal blower support may be provided in other forms (e.g., as a ridge or plate).

[0107] The housing 8010 of the RPT device 8000 may include guide members to facilitate alignment and connection of the RPT device 8000 with one or more complementary components of a respiratory treatment system (e.g., a humidifier 5000 and / or an external battery 9000 for powering the RPT device 8000). For example, the lower housing portion 8014 includes rails 8019 on each side. In one embodiment, the rails 8019 may facilitate alignment and connection of the upper housing portion 8012 and the lower housing portion 8014 and / or facilitate handling / grip of the RPT device 8000.

[0108] Each rail 8019 may define or include a path of travel relative to a complementary component of the RPT device 8000. This path of travel may take the form of, for example, an elongated rectangular recess as shown in FIG. 4H or an elongated longitudinal protrusion as shown in FIG. Of course, other forms may be suitable.

[0109] One or more of the rails 8019 may include a retention feature (e.g., a recessed slot 8110 as shown in FIGS. 4X1 and 4X2) for latching the RPT device 8000. This retention feature may also be used to disengage the RPT device from a complementary component connected to the RPT device.

[0110] In some forms, each rail 8019 may be configured for relative movement to a complementary roller, bearing or guide. Alternatively, it should be understood that the RPT device 8000 may include rollers, bearings or guides for engagement with rails disposed on a complementary component.

[0111] The upper housing portion 8012 and the lower housing portion 8014 may be connected to each other in any suitable manner (eg, mechanical fasteners, mechanical interlocks, and / or snap-fit ​​connections).

[0112] The first end 8016 is supported by (e.g., connected to) the upper housing portion 8012 and the lower housing portion 8014 by mechanical fasteners, mechanical interlocks, and / or snap-fit ​​connections. The first end 8016 is supported adjacent the first plate assembly 8050 such that the housing inlet 8018 is constructed and configured to interface with an inlet tube array 8052 of the first plate assembly 8050 and the housing outlet 8020 is constructed and configured to interface with an outlet bellows 8056 of the first plate assembly 8050, as described in further detail below.

[0113] The first end 8016 includes a cover plate 8021 with a number of openings 8023 that provide a housing inlet 8018. The number of openings 8023 allow sufficient airflow while avoiding ingress of larger objects. A recessed opening 8025 (see, e.g., FIG. 4F and FIG. 4G) is provided to the first end 8016 in communication with the number of openings 8023. The recessed opening 8025 interfaces with an inlet tube array 8052 provided to the first plate assembly 8050 such that airflow travels through the number of openings 8023 and the opening 8025 to the inlet tube array 8052 which communicates with the first chamber 8001.

[0114] The housing outlet 8020 includes a tube section 8026 (e.g., a cuff of an air delivery tube) constructed and configured to receive and hold an end of the air circuit 4170. The tube section 8026 and the end of the air circuit may be connected to each other in any suitable manner (e.g., mechanical interlocking, snap-fit ​​connection, and / or friction fit). The interior of the tube section 8026 is constructed and configured to communicate with the outlet bellows 8056 of the first plate assembly 8050, allowing the end of the air circuit 4170 to engage and form a seal with the outlet bellows 8056 that communicates with the blower outlet 8034 of the blower 8030, thereby forming a seal for the air path. Further examples and details of the connection of the air circuit to the outlet of the RPT device are disclosed in U.S. Provisional Application No. 62 / 130,813, filed March 10, 2015, which is incorporated herein by reference in its entirety.

[0115] The first end 8016 also includes an opening or tube portion 8027 constructed and configured to receive and hold an end of an electrical plug. The tube portion 8027 and the end of the electrical plug may be connected to one another in any suitable manner (e.g., mechanical interlocking, a snap-fit ​​connection, and / or a friction fit). The interior of the tube portion 8027 is constructed and configured to communicate with an electrical socket 8080, which allows the end of the electrical plug to electrically engage with the electrical socket 8080 and provide power to the RPT device 8000.

[0116] The second end 8022 is supported by and connected to the upper housing portion 8012 and the lower housing portion 8014 by, for example, a mechanical fastener, a mechanical interlock, and / or a snap-fit ​​connection. The second end 8022 cooperates with an interior wall 8028 (i.e., provided by the lower housing portion 8014 and the middle cover 8040) to define an interior chamber portion 8006 (see, for example, FIG. 4I ) constructed and arranged to receive the second PCB 8074. The interior chamber portion 8006 is external to the air path.

[0117] 5.4.1.2 Blower In the illustrated embodiment, the blower 8030 of the RPT device 8000 includes a three-stage design constructed and configured to generate a flow or air supply at a positive pressure of up to 45-50 cmH2O (e.g., in the range of 2-50 cmH2O (e.g., 3-45 cmH2O, 4-30 cmH2O)). However, in alternative embodiments, the blower 8030 may include a single stage design, a two-stage design, or a four or more stage design.

[0118] As best shown in FIG. 4I, the blower 8030 includes a housing 8031 ​​including an axial air inlet (blower inlet) 8032 and an axial air outlet (blower outlet) 8034. Between the axial air inlet (blower inlet) 8032 and the axial air outlet (blower outlet) 8034, three stages are arranged with three corresponding impellers 8033A, 8033B and 8033C (i.e., a first impeller 8033A and a second impeller 8033B arranged on one side of the motor 8035, and a third impeller 8033C arranged on the other side of the motor 8035). However, other suitable impeller arrangements are possible. Each impeller is followed by a set of stator vanes constructed and arranged to direct the airflow to the next stage.

[0119] In the illustrated embodiment, the blower 8030 is supported within the first chamber 8001, and the blower housing 8031 ​​is constructed and arranged to be relatively rigid and to hermetically separate the airflow from the first chamber 8001 through the interior of the blower 8030. In one embodiment, the housing 8031 ​​can include multiple housing sections (e.g., a first housing portion including an inlet 8032, a second housing portion including an outlet 8034, and an intermediate housing portion (e.g., a stationary component providing a stator vane that directs the airflow) that are interconnected (e.g., by welding) to form a substantially sealed structure.

[0120] Further examples and details of blower 8030 are described in PCT Patent Application Publication No. WO2013 / 020167, the entirety of which is incorporated herein by reference.

[0121] As described in further detail below, the first plate assembly 8050 and the second plate assembly 8060 each include a blower suspension 8054 and 8064. The blower suspensions 8054 and 8064 cooperate to support the blower 8030 within the housing 8010, provide air path sealing, isolate blower vibrations, and provide shock resistance. The blower suspensions 8054 and 8064 may provide additional springing and damping that allows for vibration isolation and providing shock resistance. Specifically, the first plate assembly 8050 provides an outlet end suspension 8054 that supports the blower 8030 adjacent the blower outlet 8034, and the second plate assembly 8060 provides an inlet end suspension 8064 that supports the blower 8030 adjacent the blower inlet 8032 (i.e., a suspension is provided at each end of the blower 8030).

[0122] 5.4.1.3 Intermediate cover The middle cover 8040 (also referred to as the middle housing section of the housing) is supported between the upper housing section 8012 and the lower housing section 8014 of the housing 8010. The middle cover 8040 is constructed and arranged to define at least a portion of the air path (e.g., define the top and sides of the air path) and to define at least a portion of an interior chamber exterior to the air path that receives the PCBA 8070.

[0123] Similar to the lower housing portion 8014 described above, the middle cover 8040 includes an internal slot 8042A (e.g., formed by spaced apart side walls) and an internal slot 8042B (e.g., formed by spaced apart side walls). The internal slot 8042A is constructed and configured to receive the first plate assembly 8050 along one end thereof. The internal slot 8042B is constructed and configured to receive and support the second plate assembly 8060 along its other end. See, e.g., FIGs. 4H and 4L. Thus, the middle cover 8040 cooperates with the lower housing portion 8014 to support and retain the first plate assembly 8050 and the second plate assembly 8060 within the RPT device 8000.

[0124] In the illustrated embodiment, the middle cover 8040 may comprise an upper portion and the lower housing section 8014 may comprise a lower portion, which are engageable or separable in a direction generally normal to the axis of the inlet tube 8055 / flow tube 8065 of the first plate assembly 8050 and the second plate assembly 8060, respectively, and / or generally in-plane or parallel to the base plates 8051 and 8061. In one embodiment, the upper and lower portions are engageable or separable in a direction generally normal to the axis of at least one tube of the first plate assembly 8050.

[0125] The intermediate cover 8040 also includes an end wall 8028A that cooperates with an end wall 8028B of the lower housing portion 8014 to define an internal wall 8028. See, e.g., FIG. 4I and FIG. 4L. The internal wall 8028 separates the airflow path from an internal chamber portion 8006 configured to receive the second PCB 8074. See, e.g., FIG. 4I. The main wall 8044 of the intermediate cover 8040 also cooperates with the upper housing portion 8012 to define an internal chamber portion 8007 that receives the primary PCB 8072. See, e.g., FIG. 4I. Thus, the intermediate cover 8040 defines the internal chamber portions 8006 and 8007 external to the air path that receive the primary PCB 8072 and the second PCB 8074.

[0126] The intermediate cover 8040, together with the lower housing portion 8014 and the first plate assembly 8050 and second plate assembly 8060, defines the upper, lower and sides of the first chamber 8001 and second chamber 8002, thereby defining a pneumatic air path extending to the blower inlet 8032 of the blower 8030.

[0127] In the illustrated embodiment, the intermediate cover 8040 includes a first portion or base mold 8040A made of a relatively hard material (e.g., polypropylene) and a second portion or overmold 8040B provided (e.g., by overmolding) to the first portion 8040A and made of a relatively soft material (e.g., TPE or silicone). In the illustrated embodiment, the overmold 8040B is provided on the inner surface of the base mold 8040A (i.e., the overmold 8040B is provided along the airflow path). The overmold 8040B provides a damping property that attenuates wall-radiated noise. However, it should be understood that the overmold 8040B may be provided on the interior and / or exterior surface of the base mold 8040A.

[0128] Additionally, the overmold 8040B extends along the edges of the mid-cover 8040. The mid-cover 8040 cooperates with a seal (e.g., TPE or silicone) provided along the sidewall edges of the lower housing section 8014 to seal the air path.

[0129] 5.4.1.4 First Plate Assembly As best shown in Figures 4M, 4N and 4I, the first plate assembly 8050 includes a base plate 8051, an inlet tube array 8052, a tube section 8053 including a blower suspension (outlet end suspension) 8054 along one end, and an outlet bellows 8056 along the other end. The tube section 8053 includes an opening 8053A (see, e.g., Figure 4N) that communicates with a pressure port 8058. Additionally, a sealing lip or flange 8059 is provided along the edge or periphery of the base plate 8051.

[0130] In one embodiment, the base plate 8051, inlet tube array 8052 and tube section 8053 include a first portion or base mold constructed of a relatively hard material (e.g., polypropylene), the blower suspension 8054, the outlet bellows 8056 and the pressure port 8058, and the sealing lip 8059 includes a second portion or overmold constructed of a relatively soft material (e.g., TPE or silicone) attached (e.g., by overmolding) to the first portion.

[0131] As discussed above, the first plate assembly 8050 is supported between the mid cover 8040 and the lower housing section 8014 (i.e., the base plate 8051 supported within internal slots 8042A and 8015A provided by the mid cover 8040 and the lower housing section 8014). The base plate 8051 defines the walls of the first chamber 8001, and a sealing lip 8059 along the periphery of the base plate 8051 provides a seal along the edge of the first chamber 8001.

[0132] The blower suspension 8054 of the first plate assembly 8050 takes the form of an outlet end suspension and supports the blower 8030 adjacent the blower outlet 8034 of the blower 8030. The outlet end suspension 8054 (e.g., constructed from an elastomeric material such as TPE or silicone) includes a first end 8054A attached (e.g., by overmolding) to the tube section 8053, a second end 8054B that engages or is otherwise secured to the blower outlet 8034 of the blower 8030, and a gusset section 8054C extending radially outwardly between the first end 8054A and the second end 8054B.

[0133] The second end 8054B may be secured to the blower 8030 in any suitable manner (e.g., wrapped around an outlet flange on the blower outlet 8034 as shown in FIG. 4I). The blower suspension 8054 seals the blower outlet 8034 against the tube section 8053, thereby sealing the air path for air from the first chamber 8001 to exit the blower outlet 8034. Additionally, the gusset section 8054C of the blower suspension 8054 allows flexibility and relative movement for vibration isolation and providing shock resistance for the blower 8030.

[0134] As described above, the outlet bellows 8056 of the first plate assembly 8050 is constructed and arranged to be disposed within the tube section 8026 of the housing outlet 8020 and to form a seal with the end of the air circuit 4170 (e.g., the cuff of the air delivery tube). The outlet bellows 8056 (e.g., constructed from an elastomeric material such as TPE or silicone) includes an end 8056A disposed (e.g., by overmolding) into the tube section 8053 and a bellows section 8056B that curves radially inwardly from the end 8056A. The bellows section 8056B is flexible so that the end of the air circuit engages with the bellows section 8056B to form a seal. As shown in FIG. 4M, the periphery of the outlet bellows 8056B may be provided with spaced apart partial projections 8056C, for example to add rigidity to the base of the outlet bellows 8056B.

[0135] A pressure port 8058 may be integrated with the blower suspension 8054 and is constructed and configured to interface with or otherwise connect to a pressure sensor.

[0136] The inlet tube array 8052 includes a plurality of inlet tubes 8055 constructed and arranged to extend from a base plate 8051 into the first chamber 8001. For example, the inlet tubes 8055 extend generally perpendicular to the base plate 8051. In the illustrated embodiment, the inlet tube array 8052 provides a first end 8052A. The first end 8052A protrudes slightly from one side of the base plate 8051 to interface with a recessed opening 8025 in the first end 8016 of the housing 8010. As illustrated, the shape of the recessed opening 8025 corresponds to the shape of the first end 8052A along its perimeter. A second end 8052B of the inlet tube array 8052 protrudes from the other side of the base plate 8051 to extend into the first chamber 8001. Thus, the airflow path extends from the housing inlet 8018 through the inlet tube array 8052 and into the first chamber 8001 .

[0137] This arrangement reduces the noise output of the RPT device 8000 by increasing the acoustic impedance through the inlet tube 8055 while maintaining high inertance. In one embodiment, a longer inlet tube 8055 may be better for noise reduction (due to higher inertance), and the length of the inlet tube 8055 may be tailored or selected to match the particular noise frequency characteristics of the RPT device 8000.

[0138] In one embodiment, the length of the inlet tube 8055 may be configured so as not to adversely interact with any high amplitude noise frequencies. For example, the length of the inlet tube 8055 may be adjusted so as not to coincide with a quarter or half waveform of any peak in the blower noise spectrum. Peaks (i.e., tonal peaks) in the blower noise spectrum may occur due to one or more of bearing imperfections, blade passing, turbulence, and structural resonance.

[0139] In the illustrated embodiment, each of the multiple inlet tubes 8055 includes a non-circular cross-sectional shape (e.g., a hexagonal cross-sectional shape), and the multiple inlet tubes 8055 are positioned adjacent to one another to form an inlet tube array 8052. That is, the inlet tubes 8055 are positioned adjacent to one another such that adjacent tubes share at least one sidewall or sidewall portion (i.e., adjacent tubes include at least one common sidewall or sidewall portion). As illustrated, adjacent tubes 8055 are separated by thin walls to facilitate efficient packaging of the inlet tube array 8052. The use of multiple relatively small inlet tubes 8055 may further promote laminar flow through the inlet tubes 8055.

[0140] In one embodiment, each of the multiple inlet tubes 8055 can include a draft angle that allows the mold to withdraw from the tube during the molding process. Such draft angles can be in either direction (i.e., converging away from the base plate 8051 or converging toward the base plate 8051).

[0141] In one embodiment, each of the plurality of inlet tubes 8055 has a length of about 35-55 mm (e.g., about 40-50 mm, e.g., about 43 mm), a wall thickness of about 1 mm, and a face-to-face distance (diameter) of about 3-5 mm (e.g., about 3.5-4.5 mm, e.g., about 4.33 mm). Thus, the cross-sectional area of ​​each hexagonal tube 8055 is about 10-20 mm. 2 (For example, about 16.2 mm 2) and the total cross-sectional area of ​​all inlet tubes 8055 may be about 100 to 130 mm 2 (For example, about 110 to 120 mm 2 , (For example, about 114 mm 2 )), however, it should be understood that other suitable lengths, wall thicknesses, face-to-face distances (diameters), and cross-sectional areas of the tube 8055 are possible depending, for example, on the noise characteristics desired.

[0142] In the illustrated embodiment, the inlet tube array 8052 includes seven inlet tubes 8055, with six inlet tubes arranged around a central inlet tube, however, it should be understood that other suitable numbers of tubes 8055 are possible (e.g., one or more inlet tubes, e.g., between 5 and 10 inlet tubes) and that the tubes 8055 may be arranged in other suitable manners (e.g., spaced apart, aligned in rows, etc.).

[0143] Each of the multiple inlet tubes 8055 may be configured as a single section or may include multiple sections. For example, each inlet tube 8055 may include an outer tube and an inlet throttle valve configured to vary the diameter of the tube.

[0144] The multiple inlet tubes 8055 may include equal and / or unequal length inlet tubes. The multiple inlet tubes 8055 may include a tapered shape at one or more ends.

[0145] Additionally, each of the plurality of inlet tubes 8055 may include other cross-sectional shapes (e.g., circular or non-circular (e.g., square, rectangular)). In the illustrated embodiment, the inlet tube array 8052 includes a perimeter that is a non-circular shape. However, the perimeter shape of the inlet tube array 8052 may include other suitable shapes (e.g., circular or non-circular).

[0146] For example, Figures 4S-4U show alternative arrangements of an inlet tube array 8052. In Figure 4S, the inlet tube array 52A includes a circular perimeter with each inlet tube including a square or truncated square shape. In Figure 4T, the inlet tube array 52B includes a circular perimeter with each inlet tube including a hexagon or truncated hexagon shape. In Figure 4U, the inlet tube array 52C includes a square perimeter with each inlet tube including a square shape.

[0147] 5.4.1.5 Second Plate Assembly As best shown in Figures 4O and 4P, the second plate assembly 8060 includes a base plate 8061, a flow tube array 8062, and a blower suspension (outlet end suspension) 8064 supported within an opening 8063 provided in the base plate 8061. In addition, a sealing lip or flange 8069 is provided along the edge or periphery of the base plate 8061.

[0148] In one embodiment, the base plate 8061 and the flow tube array 8062 include a first portion or base mold comprised of a relatively hard material (e.g., polypropylene), and the blower suspension 8064 and the sealing lip 8069 include a second portion or overmold comprised of a relatively soft material (e.g., TPE or silicone) that is applied (e.g., by overmolding) to the first portion.

[0149] As discussed above, the second plate assembly 8060 is supported between the mid cover 8040 and the lower housing section 8014 (i.e., the base plate 8061 supported within internal slots 8042B and 8015B provided by the mid cover 8040 and the lower housing section 8014). The base plate 8061 defines the walls of the first chamber 8001 and the second chamber 8002, and a sealing lip 8069 along the periphery of the base plate 8061 provides a seal along the edges of the first chamber 8001 and the second chamber 8002.

[0150] The blower suspension 8064 of the second plate assembly 8060 takes the form of an inlet end suspension to support the blower 8030 adjacent the blower inlet 8032 of the blower 8030. The inlet end suspension 8064 (e.g., constructed from an elastomeric material such as TPE or silicone) includes a radially outer portion 8064A disposed (e.g., by overmolding) into the opening 8063 in the base plate 8061, a radially inner portion 8064B that engages or is otherwise secured to the blower inlet 8032 of the blower 8030, and an intermediate portion 8064C between the outer portion 8064A and the inner portion 8064B.

[0151] The radially inner portion 8064B may be secured to the blower 8030 in any suitable manner (e.g., wrapped around an inlet flange to the blower inlet 8032 as shown in FIG. 4I). The blower suspension 8064 provides a seal along the blower inlet 8032, sealing it off from the first chamber 8001 and providing an air path for air to enter the blower inlet 8032 from the second chamber 8002. Also, in the illustrated embodiment, the middle portion 8064C of the blower suspension 8064 is axially offset from the outer portion 8064A and the inner portion 8064B, providing flexibility and relative movement that allows for vibration isolation and shock resistance of the blower 8030.

[0152] The flow tube array 8062 includes a plurality of flow tubes 8065 constructed and arranged to extend from a base plate 8061 into the first chamber 8001 (e.g., the flow tubes 8065 extend generally perpendicular to the base plate 8061). In the illustrated embodiment, each flow tube 8065 includes a first end 8065A disposed into the base plate 8061 and a second end 8065B protruding from the base plate 8061 to extend into the first chamber 8001. Thus, an airflow path extends from the first chamber 8001 through the flow tube array 8062 and into the second chamber 8002.

[0153] Similar to the inlet tube array 8052, the flow tube array 8062 is constructed and arranged to reduce the noise output of the RPT device 8000 by increasing the acoustic impedance through the flow tubes 8065 while maintaining a high inertance.

[0154] In the illustrated embodiment, the flow tube array 8062 includes six spaced apart flow tubes 8065. The flow tubes 8065 are generally arranged in three rows of two tubes, which rows are generally offset from one another. However, it should be understood that other suitable numbers of tubes 8065 (e.g., one or more flow tubes, e.g., between 4 and 10 flow tubes) are possible, and that the tubes 8065 can be arranged in other suitable manners (e.g., aligned in rows and / or columns, in a circular configuration, adjacent tubes interengaging with one another).

[0155] In the illustrated embodiment, the plurality of flow tubes 8065 each include a circular cross-sectional shape, however, it should be understood that the tubes 8065 each may include other cross-sectional shapes (eg, circular or non-circular shapes).

[0156] In one embodiment, each of the plurality of flow tubes 8065 can include any suitable length, diameter, wall thickness, and cross-sectional area, depending on, for example, the desired noise characteristics. In one embodiment, the length of the flow tubes 8065 can be adjusted or selected to match the particular noise frequency characteristics of the RPT device 8000.

[0157] In one embodiment, each of the multiple flow tubes 8065 can include a draft angle that allows the mold to withdraw from the tube during the molding process. Such draft angles can be in either direction (i.e., converging away from the base plate 8061 or converging toward the base plate 8061).

[0158] The plurality of flow tubes 8065 may include flow tubes of equal and / or unequal lengths. The plurality of flow tubes 8065 may include an angled shape at one or more ends.

[0159] 5.4.1.6 Inlet and Flow Tube Array Configurations In the illustrated embodiment, the inlet tube array 8052 and the flow tube array 8062 are constructed and positioned relative to each other within the first chamber 8001 to reduce the noise output of the RPT device 8000.

[0160] 4Q and 4R, the inlet tube array 8052 is axially spaced from the flow tube array 8062, with the tubes 8055 of the inlet tube array 8052 including axes that are aligned substantially parallel to the axes of the tubes 8065 of the flow tube array 8062, but the tubes 8055 of the inlet tube array 8052 are not aligned coaxially with the tubes 8065 of the flow tube array 8062. This arrangement reduces the amount of noise that radiates from the flow tube array 8062 and then directly into the inlet tube array 8052.

[0161] The axially offset arrangement can be obtained by offsetting the central axis of the inlet tube array 8052 (i.e., the central axis defined by all of the inlet tubes 8055 combined) from the central axis of the flow tube array 8062 (i.e., the central axis defined by all of the flow tubes 8065 combined) and / or the axially offset arrangement can be obtained by arranging the inlet tube array 8052 and the flow tube array 8062 such that one or more of the individual tubes 8055 and 8065 are not coaxially or axially aligned (i.e., axially offset) with respect to one another. For example, in the arrangement shown in FIG. 4R, the tubes 8055 of the inlet tube array 8052 each include an axis that is offset from the axis of each of the tubes 8065 of the flow tube array 8062.

[0162] In the illustrated serial configuration, the tubes 8055 of the inlet tube array 8052 can be axially spaced from the tubes 8065 of the flow tube array 8062 (e.g., the spacing d (see FIG. 4Q) between the inlet tube array 8052 and the flow tube array 8062 can be at least 5 mm (e.g., about 10-15 mm)).

[0163] Additionally, in the illustrated embodiment, the tubes 8055 of the inlet tube array 8052 and the tubes 8065 of the flow tube array 8062 each include an axis that is aligned substantially parallel to the axis of the blower 8030 .

[0164] 5.4.1.7 Printed Circuit Board Assembly As described above, the PCBA 8070 includes a primary PCB 8072 and a secondary PCB 8074, with the primary PCB 8072 supported within an interior chamber portion 8007 (e.g., defined by the top housing portion 8012 and the mid-cover 8040) and the secondary PCB 8074 supported within an interior chamber portion 8006 (e.g., defined by the second end portion 8022, the mid-cover 8040 and the bottom housing portion 8014). This arrangement positions the primary PCB 8072 and the secondary PCB 8074 outside of the airflow path.

[0165] The PCBA 8070 is electrically connected to the blower 8030 by one or more electrical connectors (e.g., electrical connector 8090 shown in FIGS. 4H and 4L). In the embodiment shown in FIG. 4G, the blower 8030 includes an electrical connector portion 8038 that extends to the exterior of the blower housing 8031, and the electrical connector 8090 is constructed and arranged to electrically connect the electrical connector portion 8038 of the blower 8030 to the PCBA 8070.

[0166] In one embodiment, the electrical connector 8090 can be a flexible circuit board (FCB), a flexible printed circuit (FPC) and / or a flexible flat cable (FFC) for electrically connecting the blower 8030 to the PCBA 8070.

[0167] In one embodiment, the electrical connector 8090 may be positioned to pass through an internal air chamber of the RPT device 8000 (e.g., through the first chamber 8001) without being directly in the airflow path (e.g., without being positioned between the inlet tube array 8052 and the flow tube array 8062). For example, in the illustrated embodiment, the electrical connector 8090 may be positioned to pass around the periphery of the inlet tube array 8052.

[0168] The electrical connector 8090 may be pre-formed into a particular shape to reduce the possibility of interference with one or more components of the RPT device 8000. Also, the electrical connector 8090 may have sufficient length so that it remains loose when connected (e.g., to isolate vibrations conducted from the blower 8030 through the electrical connector 8090).

[0169] In one embodiment, the electrical connector 8090 may be constructed and arranged to aid in achieving a reliable seal due to its small low profile form factor, in one embodiment, tape and / or adhesive may be provided to further seal any gaps present where the electrical connector 8090 exits the housing portion and / or mid cover.

[0170] 5.4.1.8 Air filter(s) An RPT device according to one form of the present technology may include an air filter or multiple air filters.

[0171] In one form, the inlet air filter is located where the pneumatic path begins upstream of the blower (eg, housed in cover plate 8021).

[0172] In one form an outlet air filter (eg, antibacterial) is provided between the outlet of the pneumatic block and the patient interface 3000.

[0173] 5.4.1.9 Transducer(s) The transducer may be internal to the RPT device or external to the RPT device. An external transducer may, for example, be located on the air circuit or form part of the air circuit (e.g., a patient interface). An external transducer may take the form of a non-contact sensor (e.g., a Doppler radar movement sensor that transmits or moves data RPT device).

[0174] In one form of the present technology, one or more transducers may be placed upstream and / or downstream of the blower. The one or more transducers may be constructed and arranged to measure a property, such as flow rate, pressure, or temperature, at that point in the pneumatic path.

[0175] In one form of the present technology, one or more transducers may be placed proximate the patient interface 3000.

[0176] In one form, the signal from the transducer may be filtered (eg, by low-pass, high-pass or band-pass filtering).

[0177] 5.4.1.9.1 Flow Sensor A flow sensor according to the present technology may be based on a differential pressure transducer (eg, the SDP600 series differential pressure transducers from SENSIRION).

[0178] In one form, a signal representative of the flow rate (eg, the total flow rate Qt from the flow sensor) may be received by a central controller.

[0179] 5.4.1.9.2 Pressure Sensor A pressure sensor according to the present technology may be placed in fluid communication with the pneumatic pathway. One example of a suitable pressure transducer is a sensor from the HONEYWELL ASDX series. Another suitable pressure transducer is a sensor from the NPA series from GENERAL ELECTRIC.

[0180] In one form, the signal from the pressure sensor may be received by a central controller.

[0181] 5.4.1.9.3 Motor Speed ​​Converters In one form of the present technology, a motor speed transducer may be used to determine the rotational speed of the motor and / or blower. A motor speed signal from the motor speed transducer may be provided to a therapy device controller. The motor speed transducer may be, for example, a speed sensor (e.g., a Hall effect sensor).

[0182] 5.4.1.10 Anti-spillback valves In one form of the present technology, an anti-spillback valve may be placed between the humidifier 5000 and the pneumatic block. The anti-spillback valve is constructed and positioned to reduce the risk of water flowing upstream from the humidifier 5000 (e.g., to the blower motor).

[0183] 5.4.1.11 Air circuits An air circuit 4170 in accordance with one aspect of the present technology is a conduit or tube that is constructed and arranged such that, in use, air flow travels between two components (eg, the pneumatic block and the patient interface 3000).

[0184] In particular, the air circuit 4170 may 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, there may be separate limbs of the circuit for inhalation and exhalation. In other cases, a single limb is used.

[0185] In some forms, the air circuit 4170 may include one or more heating elements configured to heat the air in the air circuit (e.g., to maintain or increase the air temperature). The heating elements may take the form of a heated wire circuit and may include one or more transducers (e.g., temperature sensors). In one form, the heated wire circuit may be spirally wound around the axis of the air circuit 4170. The heating elements may be in communication with a controller (e.g., a central controller). One example of an air circuit 4170 including a heated wire circuit is described in U.S. Patent Application No. US / 2011 / 0023874, which is incorporated by reference in its entirety.

[0186] 5.4.1.12 Oxygen delivery In one form of the present technology, supplemental oxygen can be delivered to one or more points in the pneumatic pathway (eg, upstream of the pneumatic block), the pneumatic circuit 4170 and / or the patient interface 3000.

[0187] 5.4.2 RPT Device Electrical Components 5.4.2.1 Power supply The power source may be located inside or outside the external housing of the RPT device 8000.

[0188] In one form of the present technology, the power source only powers the RPT device 8000. In another form of the present technology, the power source provides power to both the RPT device 8000 and the humidifier 5000.

[0189] 5.4.2.2 Input Devices In one form of the present technology, the RPT device 8000 includes one or more input devices (e.g., buttons 8003, 8004) in the form of buttons, switches, or dials to enable human-device interaction. The buttons, switches, or dials may be physical or software devices accessible via a touch screen. The buttons, switches, or dials may be physically connected to an external housing in one form, or may communicate wirelessly with a receiver electrically connected to a central controller in another form.

[0190] In one form, the input device may be constructed and arranged to allow a human to select values ​​and / or menu options.

[0191] 5.4.2.3 Central Controller In one form of the present technology, the central controller is one or more processors suitable for controlling the RPT device 8000 (e.g., a PCBA 8070 including a main PCB 8072 and a secondary PCB 8074).

[0192] Suitable processors may include x86 INTEL processors, such as processors based on the ARM® Cortex®-M processor from ARM Holdings (e.g., the S®32 series of microcontrollers from ST Microelectronics). In certain alternative forms of the present technology, 32-bit RISC CPUs (e.g., the STR9 series of microcontrollers from ST Microelectronics) or 16-bit RISC CPUs (e.g., processors from the MSP430 family of microcontrollers manufactured by TEXAS INSTRUMENTS) may also be suitable.

[0193] In one form of the present technology, the central controller is a dedicated electronic circuit.

[0194] In one form, the central controller is an application specific integrated circuit. In another form, the central controller includes discrete electronic components.

[0195] The central controller may be configured to receive input signal(s) from one or more transducers, one or more input devices, and the humidifier 5000.

[0196] The central controller may be configured to provide output signal(s) to one or more of the output device, the therapy device controller, the data communication interface, and the humidifier 5000.

[0197] In some forms of the present technology, a central controller is configured to execute one or more of the methods described herein (e.g., one or more algorithms expressed as a computer program stored in (e.g., a memory), such as a non-transitory computer-readable recording medium). In some forms of the present technology, the central controller may be integrated with the RPT device. However, in some forms of the present technology, some of the methods may be performed by a remotely located device. For example, the remotely located device may determine vent control settings or detect respiratory-related events by analysis of recorded data (e.g., from any of the sensors described herein).

[0198] 5.4.2.4 Clock The RPT device may include a clock connected to a central controller.

[0199] 5.4.2.5 Therapy Device Controller In one form of the present technology, the blower may be under the control of a therapy device controller, which may be a therapy control module forming part of the algorithms executed by a central controller.

[0200] In one form of the present technology, the therapy device controller is a dedicated motor control integrated circuit, for example, in one form, the MC33035 brushless DC motor controller manufactured by ONSEMI is used.

[0201] 5.4.2.6 Protection circuit The one or more protection circuits according to the present technology may include electrical protection circuits, temperature and / or pressure safety circuits.

[0202] 5.4.2.7 Memory In accordance with one form of the present technology, the RPT device includes memory (e.g., non-volatile memory). In some forms, the memory may include battery-powered static RAM. In some forms, the memory may include volatile RAM.

[0203] The memory may be located on the PCBA. The memory may be in the form of an EEPROM or NAND flash.

[0204] Additionally or alternatively, the RPT device includes removable memory (eg, a memory card made according to the Secure Digital (SD) standard).

[0205] In one form of the technology, the memory functions as a non-transitory computer-readable storage medium on which computer program instructions (e.g., one or more algorithms) embodying one or more of the methods described herein are recorded.

[0206] 5.4.2.8 Data communication systems In one form of the present technology, a data communication interface is provided and connected to a central controller. The data communication interface may be connectable to a remote external communication network and / or a local external communication network. The remote external communication network may be connectable to a remote external device. The local external communication network may be connectable to a local external device.

[0207] In one form, the data communications interface is part of the central controller, hi another form, the data communications interface is separate from the central controller and may include an integrated circuit or processor.

[0208] In one form, the remote external communications network is the Internet. The data communications interface may use wired communications (e.g., via Ethernet or fiber optics) or may use wireless protocols (e.g., CDMA, GSM, LTE) to connect to the Internet.

[0209] In one embodiment, the local external communications network uses one or more communications standards (eg, Bluetooth or Consumer Infrared Protocol).

[0210] In one form, the remote external device is one or more computers (e.g., a cluster of networked computers). In one form, the remote external device may be a virtual computer rather than a physical computer. In either case, such a remote external device may be accessible by appropriately authorized personnel (e.g., a clinician).

[0211] The local external device may be a personal computer, a mobile phone, a tablet or a remote control.

[0212] 5.4.2.9 Optional displays and output devices, including alarms Output devices according to the present technology may take the form of one or more of visual, audio and tactile units. The visual display may be a Liquid Crystal Display (LCD) or a Light Emitting Diode (LED) display.

[0213] 5.4.2.9.1 Display Drivers A display driver receives as input characters, symbols or images to be displayed on a display and converts them into commands that cause the display to display those characters, symbols or images.

[0214] 5.4.2.9.2 Display The display is configured to visually display characters, symbols, or images in response to commands received from a display driver. For example, the display may be an eight-segment display, in which case the display driver converts each character or symbol (e.g., the number "0") into eight logic signals indicating which of the eight segments should be activated to display the particular character or symbol.

[0215] 5.4.3 RPT Device Accessories 5.4.3.1 External Battery An external battery 9000 according to some forms of the present technology is shown in Figures 4W1 and 4W2.

[0216] The external battery 9000 may be engageable with the RPT device 8000, for example as shown in FIGS. 4X1-4Y2. The external battery 9000 may include guide members to facilitate alignment and connection with (and disconnection from) the RPT device 8000. In one form, the external battery 9000 may include one or more guide slots 9050, each configured to receive a respective guide rail 8019 of the RPT device 8000. The guide slots 9050 may further include a latch 9060 releasable by a latch button 9065. The latch 9060 may be configured to engage a recessed slot 8110 along the guide rail 8019 of the RPT device 8000 to hold the RPT device 8000 relative to the external battery 9000.

[0217] In some forms, the external battery 9000 can include a fascia 9100 as shown in FIG. 4W1. The fascia is engageable with an end of the RPT device 8000 as shown in FIG. 4Y1.

[0218] The fascia 9100 may include at least one of an air inlet 9018 and an air outlet 9020 for extending the air path of the RPT device 8000. The air inlet 9018 and / or air outlet 9020 may be configured to be substantially identical to the housing inlet 8018 and the housing outlet 8020, respectively. As such, a user may be able to use the same air conduit 4170 regardless of whether the air conduit is connected to the RPT device 8000 or to the external battery 9000.

[0219] In some cases, the battery 9000 may include a muffler such that the noise output of the RPT device 8000 is reduced. For example, the muffler may reduce the noise output from the housing outlet 8020 such that the noise output from the housing outlet 8020 is reduced at the air outlet 9020. Additionally or alternatively, the muffler may reduce the noise output from the housing inlet 8018 such that the noise from the air inlet 9018 (e.g., the noise measured at the air inlet 9018) is less than the noise from the housing inlet 8018 (e.g., the noise measured at the housing inlet 8018).

[0220] In some embodiments, the battery fascia 9100 may include a muffling chamber disposed between the housing outlet 8020 and the air outlet 9020. In other embodiments, the battery fascia 9100 may include a muffling chamber disposed between the housing inlet 8018 and the air inlet 9018. To this end, the air outlet 9020 may be displaced from the housing outlet 8020 (e.g., by approximately 30 mm). However, it should be understood that other noise reduction means may be possible between the housing outlet 8020 and the air outlet 9020, and between the housing inlet 8018 and the air inlet 9018.

[0221] The external battery may include one or more battery cells (e.g., lithium ion or nickel metal hydride batteries) configured to store electrical energy and a printed circuit board assembly (PCBA) connected to the battery cells.

[0222] The PCBA may contain components and / or circuitry that control one or more operations of the battery (e.g., power management, communication with the RPT device 8000 and / or voltage conversion).

[0223] The external battery may generate heat (e.g., heat from the PCBA and / or battery cells), so it may be desirable to manage the heating output from the external battery so that the PCBA and battery cells operate within their preferred environmental conditions.

[0224] In one aspect of the present technology, the external battery 9000 can be configured to be a thermally coupled RPT device 8000. The RPT device 8000 includes an internal air path in which ambient air is drawn through its inlet (e.g., housing inlet 8018) and delivered through its outlet (e.g., housing outlet 8020).

[0225] Thus, the airflow of the RPT device 8000 may be used to cool one or more components of the external battery 9000. That is, heat conducted from the external battery 9000 to the RPT device 8000 may be removed from the RPT device 8000 by convection.

[0226] The external battery 9000 may be configured such that heat generated by the external battery 9000 is more efficiently transferred to the RPT device 8000 for convection cooling. For example, it may be possible to place the hotter heat-generating components of the external battery 9000 in proximity to the RPT device 8000 upon assembly. In another embodiment, the external battery 9000 may include a thermally conductive element configured to transfer heat to the RPT device 8000 upon assembly.

[0227] In one configuration, such as that shown in FIG. 4Y1, the external battery 9000 may be configured to mate at the underside of the RPT device, with the hotter heat generating components of the external battery 9000 positioned toward the top of the external battery for improved heat transfer. In another configuration, the external battery 9000 may include heat pipes to improve heat transfer from the hotter heat generating components to the exterior of the external battery 9000, which may improve heat transfer RPT device 8000 upon their interconnection.

[0228] Additionally, the external battery 9000 may be configured to enhance thermal conductivity between the external battery 9000 and the RPT device 8000. For example, the external battery 9000 may include one or more conductive portions (e.g., surfaces) configured to thermally couple with the RPT device 8000 for heat transfer upon interengagement.

[0229] 5.4.4 RPT Device Algorithm 5.4.4.1 Pre-processing module 4V, a pre-processing module 4310 according to one form of the present technology receives as input a signal from a transducer (e.g., a flow sensor or pressure sensor) and performs one or more process steps to calculate one or more output values ​​that are used as inputs to another module (e.g., a therapy engine module 4320).

[0230] In one form of the present technology, the output values ​​include interface or mask pressure Pm, respiratory flow Qr and leak flow Ql.

[0231] In various forms of the present technology, the pre-processing module 4310 includes one or more of the following algorithms: pressure compensation 4312, ventilation flow estimation 4314, leak flow estimation 4316, and respiratory flow estimation 4318.

[0232] 5.4.4.2 Treatment Control Module A therapy control module 4330 according to one aspect of the present technology receives therapy parameters from the therapy parameter determination algorithm of the therapy engine module 4320 as input and controls the pressure generator to deliver airflow from the pressure generator in accordance with these therapy parameters.

[0233] In one form of the present technology, the treatment parameter is a treatment pressure Pt, and the treatment control module 4330 controls the pressure generator to deliver an airflow from the pressure generator such that the mask pressure Pm at the patient interface 3000 is equal to the treatment pressure Pt.

[0234] 5.5 Humidifier 5.5.1 Humidifier Overview In one form of the present technology, a humidifier 5000 is provided for changing the absolute humidity of air or gas to be delivered to a patient relative to the ambient air (e.g., as shown in FIG. 5A). Typically, the humidifier 5000 is used to increase the absolute humidity (relative to ambient air) and increase the temperature of the air stream before delivery to the patient's airway.

[0235] The humidifier 5000 may include a humidifier reservoir 5110, a humidifier inlet 5002 for receiving an airflow, and a humidifier outlet 5004 for delivering a humidified airflow. In some forms, such as shown in Figures 5A and 5B, the inlet and outlet of the humidifier reservoir 5110 may be the humidifier inlet 5002 and the humidifier outlet 5004, respectively. The humidifier 5000 may further include a humidifier base 5006. The humidifier base 5006 may be adapted to receive the humidifier reservoir 5110 and may include a heating element 5240.

[0236] 5.5.2 Humidifier Mechanical Components 5.5.2.1 Water reservoir According to one arrangement, the humidifier 5000 may include a water reservoir 5110 configured to contain or hold a quantity of liquid (e.g., water) to be evaporated for humidification of the airflow. The water reservoir 5110 may be configured to contain a predetermined maximum quantity of water to provide adequate humidification for at least the duration of a respiratory therapy session (e.g., a night's sleep). Typically, the reservoir 5110 is configured to contain several hundred milliliters of water (e.g., 300 milliliters (ml), 325 ml, 350 ml, or 400 ml). In another form, the humidifier 5000 may be configured to receive a water supply from an external water source (e.g., a building's water supply system).

[0237] According to one embodiment, the water reservoir 5110 is configured to humidify the air flow from the RPT device 4000 as the air flow passes through the RPT device 4000. In one form, the water reservoir 5110 may be configured to promote the air flow traveling a tortuous path through the reservoir 5110 while the air flow contacts a volume of water in the reservoir 5110.

[0238] According to one form, the reservoir 5110 may be removable from the humidifier 5000 laterally, for example as shown in Figures 5A and 5B.

[0239] The reservoir 5110 may also be configured to inhibit liquid release from the reservoir 5110, for example, when the reservoir 5110 is displaced and / or rotated from its normal operating orientation (e.g., through any aperture and / or between its subcomponents). Because the air flow to be humidified by the humidifier 5000 is often pressurized, the reservoir 5110 may also be configured to avoid loss of pneumatic pressure through leakage and / or flow impedance.

[0240] 5.5.2.2 Conductive sites According to one arrangement, the reservoir 5110 includes a conductive region 5120 configured to allow efficient heat transfer from the heating element 5240 to the volume of liquid in the reservoir 5110. In one form, the conductive region 5120 may be arranged as a plate, although other shapes may be suitable. All or part of the conductive region 5120 may be constructed of a thermally conductive material such as aluminum (e.g., approximately 2 mm (e.g., 1 mm, 1.5 mm, 2.5 mm, or 3 mm) thick), another thermally conductive metal, or some plastic. In some cases, adequate thermal conductivity may be achieved with a less conductive material of appropriate geometry.

[0241] 5.5.2.3 Humidifier Reservoir Dock In one form, the humidifier 5000 may include a humidifier reservoir dock 5130 (as shown in FIG. 5B) configured to receive the humidifier reservoir 5110. In some arrangements, the humidifier reservoir dock 5130 may include a locking feature (e.g., a locking lever 5135 configured to hold the reservoir 5110 within the humidifier reservoir dock 5130).

[0242] 5.5.2.4 Water Level Indicator The humidifier reservoir 5110 may include a water level indicator 5150 as shown in Figures 5A-5B. In some forms, the water level indicator 5150 may provide one or more indications to a user, such as the patient 1000 or a caregiver, about the amount of water in the humidifier reservoir 5110. The one or more indications provided by the water level indicator 5150 may include an indication of a maximum predetermined amount of water, any portion thereof (e.g., 25%, 50% or 75% or an amount (e.g., 200ml, 300ml or 400ml)).

[0243] 5.5.3 Humidifier Electrical & Thermal Components The humidifier 5000 may include multiple electrical and / or thermal components, such as those listed below.

[0244] 5.5.3.1 Humidifier Transducer(s) The humidifier 5000 may include one or more humidifier transducers (sensors) 5210 instead of or in addition to the transducers described above. The humidifier transducer 5210 may include one or more of an air pressure sensor 5212, an air flow transducer 5214, a temperature sensor 5216, or a humidity sensor 5218 as shown in FIG. 5C. The humidifier transducer 5210 may generate one or more output signals. These output signals may be communicated to a controller (e.g., a central controller and / or a humidifier controller 5250). In some forms, the humidifier transducer may be located outside the humidifier 5000 (e.g., within the air circuit 4170) while communicating the output signal to the controller.

[0245] 5.5.3.1.1 Pressure transducers One or more pressure transducers 5212 may be provided to the humidifier 5000 in addition to or instead of a pressure sensor provided in the RPT device.

[0246] 5.5.3.1.2 Flow Converters One or more flow transducers 5214 may be provided to the humidifier 5000 in addition to or instead of a flow sensor provided in the RPT device.

[0247] 5.5.3.1.3 Temperature Converters The humidifier 5000 may include one or more temperature transducers 5216. The one or more temperature transducers 5216 may be configured to measure one or more temperatures (e.g., the temperature of the heating element 5240 and / or the temperature of the air flow downstream of the humidifier outlet 5004). In some forms, the humidifier 5000 may further include a temperature sensor 5216 that detects the temperature of the ambient air.

[0248] 5.5.3.1.4 Humidity Transducers In one form, the humidifier 5000 may include one or more humidity sensors 5218 that detect the humidity of a gas, such as ambient air. In some forms, the humidity sensor 5218 may be positioned toward the humidifier outlet 5004 to measure the humidity of the gas delivered from the humidifier 5000. The humidity sensor may be an absolute humidity sensor or a relative humidity sensor.

[0249] 5.5.3.2 Heating elements In some cases, a heating element 5240 may be provided to the humidifier 5000 to provide heat input to one or more of the volume of water in the humidifier reservoir 5110 and / or the volume of water to the airflow. The heating element 5240 may include a heat-generating component, such as an electrical resistance heating track. One suitable example of the heating element 5240 is a layered heating element, for example, as described in PCT Patent Application Publication No. WO2012 / 171072, the entirety of which is incorporated herein by reference.

[0250] In some forms, the heating element 5240 may be mounted in the humidifier base 5006. In the humidifier base 5006, heat may be transferred to the humidifier reservoir 5110 primarily by conduction, as shown in FIG.

[0251] 5.5.3.3 Humidifier controller According to one arrangement of the present technology, the humidifier 5000 may include a humidifier controller 5250 as shown in Figure 5C. In one form, the humidifier controller 5250 may be part of the central controller 4230. In another form, the humidifier controller 5250 may be a separate controller that may communicate with the central controller.

[0252] In one form, the humidifier controller 5250 may receive measurements of characteristics (e.g., temperature, humidity, pressure and / or flow rate) as inputs (e.g., measurements of airflow, water in the reservoir 5110 and / or in the humidifier 5000). The humidifier controller 5250 may also be configured to run or implement a humidifier algorithm and / or deliver one or more output signals.

[0253] As shown in FIG. 5C, the humidifier controller 5250 may include one or more controllers (e.g., a central humidifier controller 5251, a heated air circuit controller 5254 configured to control the temperature of the heated air circuit 4170, and / or a heating element controller 5252 configured to control the temperature of the heating element 5240).

[0254] 5.6 Respiratory waveform FIG. 6 is a typical breathing waveform of a model of a human during sleep. The horizontal axis is time and the vertical axis is respiratory flow. Because parameter values ​​can vary, a typical breath can have the following approximate values: tidal volume, Vt, 0.5L; inhalation time, Ti, 1.6s; peak inhalation flow, Qpeak, 0.4L / s; exhalation time, Te, 2.4s; peak expiratory flow, Qpeak, -0.5L / s. Total breathing duration, Ttot, is about 4s. Humans typically breathe about 15 times per minute (BPM) and ventilation, Vent, is about 7.5L / min. A typical duty cycle, Ti, to Ttot ratio, is about 40%.

[0255] 5.7 Glossary For purposes of this disclosure, in certain aspects of the present technology, one or more of the following definitions may apply. In other aspects of the present technology, other definitions may apply.

[0256] 5.7.1 General Air: In certain forms of the present technology, air may refer to atmospheric air, while in other forms of the present technology, air may refer to combinations of other breathable gases (e.g., oxygen-rich atmospheric air).

[0257] Atmosphere: In certain forms of the present technology, the term "atmosphere" should be taken to mean: (i) that which is external to the treatment system or patient, and (ii) that which immediately surrounds the treatment system or patient.

[0258] For example, the atmosphere for a humidifier humidity This may be the humidity of the air immediately surrounding the humidifier (e.g., the humidity inside the room where the patient is sleeping). Such ambient humidity may differ from the humidity outside the room where the patient is sleeping.

[0259] In another embodiment, the atmosphere pressure It can be pressure directly around the body or external.

[0260] In certain forms, ambience (e.g., acoustics) noise can be considered as the background noise level in the room where the patient is, excluding noise emanating from the RPT device or from the mask or patient interface, for example. Ambient noise can come from sources outside the room.

[0261] Automatic Positive Airway Pressure (APAP) Therapy: A CPAP therapy that is capable of automatically adjusting therapeutic pressure between minimum and maximum limits, for example, between breaths, depending on the presence or absence of signs of an SDB episode.

[0262] Nasal Continuous Positive Airway Pressure (CPAP) Therapy: Respiratory pressure therapy in which the therapeutic pressure is approximately constant throughout the patient's respiratory cycle. In some forms, the pressure at the entrance to the airways increases slightly during expiration and decreases slightly during inspiration. In some forms, the pressure varies during different respiratory cycles of the patient (e.g., increased in response to detection of an indication of partial upper airway obstruction and decreased in the absence of an indication of partial upper airway obstruction).

[0263] Flow Rate: The amount (or mass) of air delivered per unit time. Flow rate typically refers to an instantaneous quantity unless otherwise specified. In some cases, when flow rate is mentioned, it refers to a scalar quantity (i.e., a quantity that has only magnitude). In other cases, when flow rate is mentioned, it refers to a vector quantity (i.e., a quantity that has both magnitude and direction). Flow rate may be given the symbol Q. "Flow rate" may be abbreviated as "flow."

[0264] Patient: A person with or without a respiratory disease.

[0265] Pressure: Force per unit area. Pressure can be measured in a variety of units (e.g., cmH2O, gf / cm 2 , hectopascals). 1cmH2O is 1g-f / cm 2 which is approximately 0.98 hectopascals. In this specification, pressure is given in units of cmH2O unless otherwise specified.

[0266] Respiratory Pressure Therapy (RPT): The addition to the airway inlet of an air supply at a therapeutic pressure that is typically positive relative to atmosphere.

[0267] Seal: When used as a noun ("seal") it can refer to a structure, and when used as a verb ("seal") it can refer to an effect. Two elements can be constructed and / or arranged to "seal" or achieve a "sealing" effect between them without the need for a separate "sealing" element itself.

[0268] Sound power: The energy carried by a sound wave per unit time. Sound power is proportional to the square of the sound pressure multiplied by the wavefront area. Sound power is usually expressed in decibels SWL (i.e., decibels relative to a reference power taken as 10 to 12 watts).

[0269] Sound Pressure: The local deviation from the ambient pressure at a given time resulting from the passage of sound waves through a medium. Sound pressure is usually measured in decibels SPL (i.e., the level taken as the threshold of human hearing, usually 20×10 -6 It is expressed in decibels relative to a reference power taken as pascals (Pa).

[0270] 5.7.2 RPT Device Terminology Leakage: The term "leakage" is taken as an unintended air flow. In one embodiment, a leak may occur due to an imperfect seal between the mask and the patient's face. In another embodiment, a leak may occur at the elbow to the perimeter.

[0271] Noise Conduction (Acoustic): In this document, conducted noise refers to noise that is carried to the patient by the pneumatic pathway (e.g., the air circuit and the patient interface and the air therein). In one form, conducted noise can be quantified by measuring the sound pressure level at the end of the air circuit.

[0272] Noise Emission (Acoustic): In this document, radiated noise refers to noise that is carried by the surrounding air to the patient. In one form, radiated noise can be quantified by measuring the sound power / pressure level of the target according to ISO 3744.

[0273] Ventilation Noise (Acoustic): In this document, ventilation noise refers to the noise generated by airflow through any vents (eg, vent holes in the patient interface).

[0274] 5.7.3 Materials Silicone or Silicone Elastomer: Synthetic rubber. In this specification, when silicone is mentioned, it refers to liquid silicone rubber (LSR) or compression molded silicone rubber (CMSR). One form of commercially available LSR is SILASTIC (in a family of products sold under this trademark) manufactured by Dow Corning. Another LSR manufacturer is Wacker. Unless otherwise specified to the contrary, exemplary forms of LSR have a Shore A (or Type A) indentation hardness of about 35 to about 45 as measured by ASTM D2240.

[0275] Polycarbonate: Typically a transparent thermoplastic polymer of bisphenol A carbonate.

[0276] 5.8 Other Notes A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the reproduction by any person of this patent document or the patent disclosure by facsimile, for purposes of disclosure in the Patent and Trademark Office patent file or records, but reserves all copyright rights thereto for all other purposes.

[0277] Unless otherwise clearly indicated from the context and unless a range of values ​​is provided, it is understood that each intervening value between the upper and lower limits of the range, the unit of the lower limit, and any other stated or intervening value of the stated range is encompassed by the technology. The upper and lower limits of these intervening ranges, which are independently included in the intervening range, are also encompassed by the technology if they specifically exceed the limits in the stated range. If the stated range includes one or both of these limits, then ranges exceeding either or both of these stated limits are also encompassed by the technology.

[0278] Furthermore, where a value or values ​​are presented herein as part of the present technology, unless otherwise indicated, it is understood that such values ​​may be approximated and may be used to any appropriate significant figures to the extent practical technical practice permits or requires.

[0279] Unless otherwise specified, all technical and scientific terms herein have the same meaning as commonly understood by one of ordinary skill in the art to which this technology belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of this technology, a limited number of exemplary methods and materials are described herein.

[0280] Although particular materials are described as being preferred for use in the construction of components, obvious alternative materials having similar properties may be substituted. Further, unless stated to the contrary, any and all components described herein are understood to be manufacturable and therefore may be manufactured collectively or separately.

[0281] Please note that as used herein and in the appended claims, the singular forms "a," "an," and "the" include their plural equivalents unless the context clearly dictates otherwise.

[0282] All publications mentioned herein are incorporated by reference to disclose and describe the methods and / or materials that are the subject of these publications. Publications mentioned herein are provided solely for their disclosure prior to the filing date of this application. Nothing herein should be construed as an admission that the present technology does not antedate such publications by virtue of prior patents. Furthermore, the dates of publications mentioned may differ from the actual publication dates, which may require independent confirmation.

[0283] In particular, the terms "comprises" and "comprising" should be construed as referring to elements, components, or steps in a non-exclusive sense, indicating that a described element, component, or step may be present in, utilized with, or combined with other elements, components, or steps that are not specifically described.

[0284] The headings used in the detailed description are for the convenience of the reader and should not be used to limit the content found in the disclosure or claims as a whole. These headings should not be used in interpreting the scope of the claims or the limitations of the claims.

[0285] Although the technology herein has been described with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the technology. In some cases, terms and symbols may indicate specific details that are not necessary for the practice of the technology. For example, the terms "first" and "second" (and the like) are used, but unless otherwise specified, these terms are not intended to indicate any order, but are used to distinguish separate elements. Furthermore, although the description or illustration of the process steps in the method may be described in an order, such order is not required. Those skilled in the art will recognize that such order can be changed and / or aspects thereof can be performed simultaneously or even synchronously.

[0286] It is therefore to be understood that numerous modifications may be made in the illustrative embodiments and other arrangements may be devised without departing from the spirit and scope of the present technology. [Explanation of symbols]

[0287] 5.9 List of References

[0288] [Table 4]

[0289] [Table 5]

[0290] [Table 6]

Claims

1. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: A first chamber; A second chamber; and at least one inlet tube constructed and arranged to allow ambient air to enter the first chamber; at least one flow tube constructed and arranged to allow air to pass from the first chamber to the second chamber; a blower constructed and arranged to generate an air flow at a positive pressure; the blower is disposed within the first chamber and constructed and arranged to receive air from the second chamber; the blower includes a housing constructed and arranged to hermetically separate an airflow from the first chamber through an interior of the housing; The apparatus, wherein the at least one inlet tube is axially spaced from the at least one flow tube.

2. The apparatus of claim 1 , wherein the housing comprises a plurality of housing sections interconnected to form a substantially sealed structure.

3. 3. The apparatus of claim 1, further comprising a flow sensor constructed and arranged to measure a first pressure in the first chamber and a second pressure in the second chamber to determine an air flow rate.

4. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: At least one chamber; an inlet tube array comprising a plurality of inlet tubes constructed and arranged to allow entry of ambient air into the at least one chamber; The apparatus, wherein at least one of the plurality of inlet tubes is disposed adjacent to another inlet tube, such that the adjacent inlet tubes include at least one common sidewall.

5. The apparatus of claim 4 , wherein each of the inlet tubes includes a non-circular cross-sectional shape.

6. The apparatus of claim 5 , wherein each of the inlet tubes includes a hexagonal cross-sectional shape.

7. The apparatus of any one of claims 4 to 6, wherein the inlet tube array comprises a periphery that is a non-circular shape.

8. An apparatus according to any one of claims 4 to 7, wherein the inlet tube array comprises between 5 and 10 inlet tubes.

9. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: At least one chamber; an inlet tube array comprising a plurality of inlet tubes constructed and arranged to allow entry of ambient air into the at least one chamber; a flow tube array including a plurality of flow tubes constructed and arranged to allow air to exit the at least one chamber; the inlet tube array is axially spaced from the flow tube array; an inlet tube of the inlet tube array including an axis aligned substantially parallel to an axis of the flow tube of the flow tube array; At least one of the inlet tubes includes an axis that is axially offset from an axis of at least one of the flow tubes.

10. 10. The apparatus of claim 9, further comprising a blower constructed and arranged to generate an air flow at a positive pressure, said blower including an axis substantially parallel to an axis of said inlet tube and said flow tube.

11. An apparatus according to any one of claims 9 to 10, wherein the inlet tube array is axially spaced from the flow tube array by about 10-15 mm.

12. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: At least one chamber; a blower constructed and arranged to generate an air flow at a positive pressure, said blower being disposed downstream of said at least one chamber; a plate assembly including a base plate defining walls of the at least one chamber, the plate assembly including at least one tube constructed and configured to allow air ingress into the at least one chamber, and a blower suspension supporting the blower.

13. 13. The apparatus of claim 12, wherein the plate assembly is a first plate assembly, the apparatus further comprising a second plate assembly, and wherein at least one tube of the first plate assembly is an inlet tube that allows air to enter the at least one chamber, and the second plate assembly includes at least one flow tube that allows air to exit the at least one chamber.

14. 14. The apparatus of claim 12, wherein the plate assembly is a first plate assembly, the apparatus further comprising a second plate assembly, the blower suspension of the first plate assembly being an outlet end suspension supporting the blower adjacent a blower outlet of the blower, and the second plate assembly including an inlet end suspension supporting the blower adjacent a blower inlet of the blower.

15. 15. The apparatus of claim 13 or 14, wherein the second plate assembly includes a base plate defining a wall of the at least one chamber.

16. 16. The apparatus of claim 15, wherein the at least one chamber includes a first chamber and a second chamber, the base plate of the first plate assembly defining a wall of the first chamber and the base plate of the second plate assembly defining a wall of the first chamber and a wall of the second chamber.

17. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: A blower and a housing including upper and lower portions defining at least one chamber; a first plate assembly including a support for the blower and at least one tube constructed and arranged to allow air entry into the at least one chamber; a second plate assembly including a support for the blower and at least one tube constructed and arranged to allow egress of air from the at least one chamber; The apparatus, wherein the upper and lower portions are engageable or separable in a direction generally normal to an axis of the at least one tube of the first plate assembly.

18. The apparatus of claim 17 , wherein the first plate assembly includes a base plate defining a wall of the at least one chamber.

19. 20. The device of claim 18, wherein the upper and lower portions are engageable or separable in a generally coplanar orientation relative to the base plate.

20. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: At least one chamber; a blower constructed and arranged to generate an air flow at a positive pressure; a first plate assembly including a base plate defining a wall of the at least one chamber and an outlet end suspension supporting the blower adjacent a blower outlet of the blower; a second plate assembly including a base plate defining a wall of the at least one chamber and an inlet end suspension supporting the blower adjacent a blower inlet of the blower.

21. 21. The apparatus of claim 20, wherein the first plate assembly includes at least one inlet tube that allows air to enter the at least one chamber and the second plate assembly includes at least one flow tube that allows air to exit the at least one chamber.

22. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: a chamber including an airflow path; a blower disposed within the chamber; a printed circuit board disposed outside the chamber; a connector constructed and arranged to electrically connect the blower and the printed circuit board; The apparatus, wherein the connector is positioned such that it passes through the chamber without being directly in the airflow path.

23. 23. The apparatus of claim 22, further comprising at least one inlet tube constructed and arranged to allow ambient air to enter the chamber, the connector being positioned to pass around the periphery of the at least one inlet tube.

24. The apparatus of any one of claims 22 to 23, wherein the connector comprises a flexible wiring board, a flexible printed circuit, or a flexible flat cable.

25. 1. An apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: A housing including an upper portion, a lower portion, and an intermediate portion between the upper portion and the lower portion, a housing, the lower and middle sections defining a first chamber section including an airflow path, and the upper and middle sections defining a second chamber exterior to the airflow path; a blower disposed within the first chamber; a printed circuit board disposed within the second chamber.

26. 26. The device of claim 25, wherein the intermediate portion includes a first portion constructed from a relatively hard material and a second portion constructed from a relatively soft material provided to the first portion.

27. 27. The apparatus of claim 26, wherein the second portion defines the first chamber.

28. The device of any one of claims 26 to 27, wherein the second portion is constituted by an elastomeric material overmolded onto the first portion.

29. 1. A system for treating a respiratory disorder, comprising: a patient interface constructed and arranged to form a seal against the patient's face; A device according to any one of claims 1 to 28, and an air circuit for connecting the patient interface and the device.

30. 1. A plate assembly for an apparatus for generating an air supply at positive pressure for the amelioration or treatment of a respiratory disorder, comprising: a base plate constructed and arranged to define walls of the chamber; a plurality of tubes disposed in the chamber, the plurality of tubes being constructed and arranged to allow air to enter and exit the chamber; a blower suspension provided to the base plate, the blower suspension constructed and arranged to support an end of a blower.

31. 31. The plate assembly of claim 30, wherein the base plate and the plurality of tubes include a first portion constructed of a relatively hard material and the blower suspension includes a second portion constructed of a relatively soft material provided to the first portion.

32. 32. The plate assembly of claim 31, wherein the second portion is comprised of an elastomeric material overmolded onto the first portion.

33. 33. A plate assembly as claimed in any one of claims 30 to 32, further comprising an outlet bellows provided to the base plate, the outlet bellows constructed and arranged to form a seal with an end of an air circuit.

34. The plate assembly of any one of claims 30 to 33, further comprising a pressure sensor constructed and arranged to connect to a pressure sensor.

35. The plate assembly of any one of claims 30 to 34, further comprising a sealing lip along a periphery of the base plate, the sealing lip constructed and arranged to provide a seal along the chamber.

36. 36. The plate assembly of claim 33, wherein the base plate and the plurality of tubes include a first portion made of a relatively hard material, and the blower suspension, outlet bellows, pressure sensor and sealing lip include a second portion made of a relatively soft material provided to the first portion.

37. 37. The plate assembly of claim 36, wherein the second portion is comprised of an elastomeric material overmolded onto the first portion.

38. 38. The plate assembly of any one of claims 30 to 37, wherein the blower suspension includes gusseted sections constructed and arranged for flexibility and relative movement to enable vibration isolation and shock resistance of the blower.

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