Identification of acoustic component for respiratory treatment system

Abstract

To provide a device and a method used for diagnosis, improvement, treatment, and prevention of a respiratory disease.SOLUTION: A device can include a pressure generator configured to generate pressurized gas to be supplied to a patient interface along an air circuit from an outlet. The device can include a sensor configured to generate a sound signal showing a sound in the air circuit. The device can include an attenuation structure 1160 configured to reduce reflection of a sound from a flow generator along the air circuit. A processor, such as a controller, can be configured to process the sound signal to identify the patient interface and / or the air circuit. The processing can detect and organize acoustic signatures by matching, averaging, etc., and / or flattening the spectrum of the sound signal.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] 1 Cross - reference to related applications This application claims the benefit of Australian Provisional Application No. 20199015 02, filed on May 2, 2019. The entire disclosure of the same is incorporated herein by reference and made a part of this specification.

[0002] 2 Background of the technology 2.1 Technical field This technology relates to one or more of the detection, diagnosis, treatment, prevention, and improvement of respiratory - related diseases. This technology also relates to medical devices or apparatuses and their use. For example, the devices of this technology can provide acoustic technologies for the identification and / or control of components of such devices for the purpose of treatment generation.

Background Art

[0003] 2.2 Description of related technologies 2.2.1 The human respiratory system and its diseases The respiratory system of the body facilitates gas exchange. The nose and mouth form the entrance to the patient's airway.

[0004] These airways include a series of branching tubes that become narrower, shorter, and more numerous as they progress deeper into the lungs. The main function of the lungs is gas exchange, which involves moving oxygen from the inhaled air into the venous blood and moving carbon dioxide in the opposite direction. The trachea divides into the right and left main bronchi, which further divide and ultimately become terminal bronchioles. The bronchi constitute the airways for conduction and are not involved in gas exchange. As the airways further divide, they become respiratory bronchioles and ultimately alveoli. Gas exchange occurs in the alveolar region of the lungs. This region is referred to as the respiratory region. See the following: "Respiratory Physiology", by John B. West, Lippincott Williams & Wilkins, 9th edition published 2012.

[0005] A range of respiratory diseases exist. Specific diseases can be characterized by specific events (e.g., apnea, hypopnea, and hyperventilation).

[0006] Obstructive sleep apnea (OSA) is a respiratory disorder characterized by events such as closure or obstruction of the upper airway during sleep. This is the result of a combination of an abnormally small upper airway and the abnormal loss of muscle tone in the tongue region, and the normal loss of the soft palate and posterior oropharyngeal wall during sleep. As a result of this condition, affected patients typically stop breathing for periods lasting between 30 and 120 seconds, sometimes 200 to 300 times a night. As a result, excessive daytime sleepiness occurs, which can cause cardiovascular disease and brain damage. This syndrome is a common disease, particularly common in middle-aged overweight men, but patients are asymptomatic. See U.S. Patent No.

[0007] To treat or improve such conditions, a range of treatments are used. Furthermore, in other respects, healthy individuals can also advantageously utilize preventive treatment for respiratory diseases. However, these have a number of drawbacks.

[0008] 2.2.2 Therapies A variety of therapies (e.g., continuous positive airway pressure (CPAP) therapy, high flow therapy (HFT), non-invasive ventilation (NIV) and invasive ventilation (IV)) are used for the is being used for.

[0009] 2.2.3 Treatment System These treatments can be provided by a respiratory treatment system or device. Such a system and device can also be used for diagnosing without treating the disease.

[0010] A respiratory treatment system can include a respiratory treatment device (RT device), an air circuit, a humidifier, a patient interface, and data management.

[0011] 2.2.3.1 Patient Interface The patient interface can be used to provide an interface to the wearer to a breathing apparatus, for example, by providing an air flow to the airway inlet. The air flow can 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 applied, the patient interface can form a seal with, for example, the area of the patient's face, thereby promoting gas delivery at a sufficient distributed pressure together with the atmospheric pressure for therapy execution (for example, at a positive pressure of about 10 cmH2O relative to the atmospheric pressure). In other treatment modalities such as oxygen delivery, the patient interface may not include a seal sufficient to promote the delivery of gas supply to the airway at a positive pressure of about 10 cmH2O. (e.g., at a positive pressure of about 10 cmH2O relative to the atmospheric pressure) In other treatment modalities such as oxygen delivery, the patient interface may not include a seal sufficient to promote the delivery of gas supply to the airway at a positive pressure of about 10 cmH2O. In other treatment modalities such as oxygen delivery, the patient interface may not include a seal sufficient to promote the delivery of gas supply to the airway at a positive pressure of about 10 cmH2O.

[0012] 2.2.3.2 Respiratory Treatment (RT) Device A respiratory treatment (RT) device, such as a respiratory pressure treatment (RPT) device, can be used for the delivery of one or more of the above-described treatments, for example, by generating an air delivery flow to the airway inlet. This air flow can be pressurized. Examples of RPT devices include C to the airway inlet. to the delivery of one or more of the above-described treatments. This air flow can be pressurized. Examples of RPT devices include C There are PAP devices and ventilators. Respiratory therapy (RT) devices can, in some cases, be high flow therapy (HFT) devices that provide high flow respiratory therapy.

[0013] Air pressure generators are known in a wide range of applications (e.g., industrial scale ventilation systems). However, air pressure generators for medical use have specific requirements that cannot be satisfied by more general air pressure generators (e.g., the reliability requirements, size requirements, and weight requirements of medical devices).

[0014] Examples of RPT devices include ventilators such as the ResMed S9 sleep therapy system, ResMed S tellar (registered trademark) series of adult and pediatric ventilators, and the ResMed Astral (registered trademark) 150 ventilator.

[0015] 2.2.3.3 Humidifier If the delivery of the air flow is carried out without humidification, it can lead to drying of the airway. When a humidifier is used with RT devices and the patient interface, humidified gas is generated, so drying of the nasal mucosa is minimized and the comfort of the patient airway is increased. In addition, in a cooler climate, generally, adding warm air to the facial area around the patient interface makes it more comfortable than in the case of cold air.

[0016] 2.2.3.4 Ventilation technology Some forms of respiratory therapy systems may include a ventilation section for pushing out the exhaled carbon dioxide. This ventilation section enables gas flow from the internal space (e.g., the plenum chamber) of the patient interface to the outside (e.g., the surroundings) of the patient interface.

[0017] ​​​​2.2.3.5 Perception and Data Management Patients, caregivers, clinicians, insurance companies, or technicians may inquire as to whether it pertains to the patient, to the individual components used in treatment, or to the entire treatment system, and may wish to collect data related to respiratory therapy. When providing respiratory therapy to a patient, there are numerous situations where one or more parties can benefit from collecting treatment-related data and leveraging the collected data.

[0018] In particular, some components of a respiratory therapy system need to be replaced more frequently than other components for effective treatment. For example, a patient interface with a silicone seal-forming part can be replaced by the patient in a few months (e.g., 3 months), while the RT device can be replaced or upgraded every few years (e.g., 3 years). In the case of components that are replaced relatively frequently (e.g., the patient interface), patients or caregivers face challenges in receiving reliable and accurate notifications about the replacement timing of the components at low cost. When replacing a component, the patient or caregiver may need to change one or more settings in the treatment system (e.g., software settings in the RT device) so that the treatment system can make the most of the new component. Therefore, being able to identify the components of a respiratory therapy system is important both for optimizing treatment and for informing patients and caregivers about the replacement timing.

[0019] To date, various solutions have been adopted in the field of respiratory therapy regarding component identification. has been proposed. For example, sensors / transducers have been proposed and used in a number of forms to collect data regarding environmental conditions, patient-related information , component identification, treatment delivery conditions, and the like. In fact, many RT devices are equipped with one or more sensors, such as flow sensors, pressure sensors, humidity sensors, temperature sensors, and the like. The signals generated by such sensors can be analyzed to generate treatment-related data, such as identification information for specific components, such as a patient interface within a respiratory treatment system.

[0020] However, the need for a series of additional components by sensors / transducers can prevent adoption in many forms. For example, data collected by a sensor / transducer needs to be transmitted, for example, from the sensor to a memory and / or a processor for storage and / or analysis. This, along with the above sensors, can further increase the costs for medical device manufacturers involved in design, testing, and / or manufacturing, and / or increase the costs and complexities for the patient.

[0021] In addition, incorporating expensive electrical and / or mechanical functions into frequently replaced components, such as patient interfaces, can be disadvantageous in providing the most cost-effective treatment and may also become environmentally unsustainable due to increased waste.

[0022] Furthermore, many of the measures proposed in relation to sensors and / or transducers are limited in that they often further increase the complexity and cost of implementation when the sensor is proposed to be placed at a location remote from where the data is stored and / or analyzed. For example, When the patient interface includes a sensor, an electrical connection to the RT device is required, which may further increase the complexity and / or cost of implementation.

[0023] In addition, designers of RT devices are faced with numerous choices and often come up with different solutions when compared with competing devices from other companies or devices from the same manufacturer but with different production times. As a result, the provided related electrical connectors may only be connectable to a specific RT device and may create non - compatibility that can be disadvantageous to certain consumer groups and / or reduce consumer options, without the intention of creating such non - compatibility. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0024] BRIEF DESCRIPTION OF THE TECHNOLOGY The present technology is related to the provision of medical devices used in the diagnosis, improvement, treatment, or prevention of respiratory diseases, and these medical devices have one or more of improved comfort, cost, effectiveness, ease of use, patient engagement, and manufacturability. MEANS FOR SOLVING THE PROBLEM

[0025] A first aspect of the present technology relates to an apparatus used in the diagnosis, improvement, treatment, or prevention of respiratory diseases.

[0026] Another aspect of the present technology relates to a method used in the diagnosis, improvement, treatment, or prevention of respiratory disorders.

[0027] One aspect of the present technology is to identify components of a respiratory therapy system by acoustic means. ​​​​​It relates to an improved respiratory therapy device configured as such. In particular, the disclosed device is configured to analyze acoustic reflections from system components and to identify those components more accurately than heretofore from an "acoustic signature". It comprises a structure and a process configured as such. This improvement is achieved at least in part by implementing one or more structures that reduce the backward reflection of sound from the device end of the air circuit, whereby, for example, the discriminability of the acoustic signatures of different patient interface types can be improved. This improvement can also be achieved at least in part by signal processing that "flattens" the spectrum of an acoustic signal such as a logarithmic spectrum, for example, before converting it into an acoustic signature.

[0028] Some embodiments of the present technology can include a device that generates respiratory therapy. This device can include a pressure generator configured to generate pressurized air that is supplied from an outlet along an air circuit to a patient interface. This device can include a sensor configured to generate an acoustic signal representing the sound of the pressure generator within the air circuit. This device can include an attenuation structure configured to reduce the reflection of sound from the pressure generator along the air circuit. The device can include a controller. The controller can be configured to process the acoustic signal so as to identify the patient interface and / or the air circuit.

[0029] In some implementations, this attenuation structure is a through-pass attenuation duct configured to vary acoustic impedance between the air circuit and the cavity of the housing of the pressure generator​​ It can be formed by. This attenuation structure can define the cross-section of the passage through the through-passage attenuation duct or be defined by the cross-section of the passage, and the cross-section is configured to expand along the path of the passage according to the shape of the inner surface of the through-passage attenuation duct. This cross-section gradually expands as it can move away from the patient interface end of the air circuit. This device can include a waveguide formed by at least an outlet and an air circuit. The attenuation structure can be arranged between the sensor and the outlet along the waveguide, and the sensor can be arranged between the attenuation structure and the air circuit along the waveguide. This attenuation structure can be formed by a horn, and this horn can have a conical shape.

[0030] In some implementations of the present technology, there is a method for identifying components of an air path connected to this respiratory therapy device in a processor associated with the respiratory therapy device. This method can include processing a sound signal representing the sound in the air path to obtain a cepstrum. This processing can include flattening the spectrum of the sound signal. This processing can include separating an acoustic signature from the cepstrum. This processing can include comparing this acoustic signature with a set of predetermined acoustic signatures corresponding to each component. This processing can include identifying the component based on the comparison of this acoustic signature with this set.

[0031] In some implementations, flattening is performed from the logarithmic spectrum of this sound signal. ​​​​​​​​​​​​​​can include removing the low-pass filtered audio signal. Removing the can include subtraction. This method can further include generating a plurality of acoustic signatures by repeating this processing and separation at least once. This method can further include combining a plurality of acoustic signatures into a composite acoustic signature. Comparing can be by comparing this composite acoustic signature with this set of predetermined acoustic signatures. Combining can include aligning one or more of the plurality of acoustic signatures with the composite acoustic signature. Combining can include averaging the plurality of acoustic signatures. This component can be a patient interface, and repeating can be synchronized with the respiratory cycle of a patient wearing the patient interface. Combining can be robust to slight variations in delay between the plurality of acoustic signatures. This method can include adjusting control parameters for operating the pressure generator of a respiratory therapy device based on the identification.

[0032] Some embodiments of the present technology can include a device for generating respiratory therapy. This device can include a pressure generator configured to generate pressurized air supplied from an outlet along an air circuit to a patient interface. This device can include a sensor configured to generate an audio signal representative of the sound of the pressure generator within the air circuit. The device can include a controller. The controller can be configured to process the audio signal to obtain a cepstrum. This processing can flatten the spectrum of the audio signal. The controller may further include extracting an acoustic signature from the cepstrum. The controller can then configure the acoustic signatures to correspond to the respective and configuring the signal processing device to compare the signal with a set of predetermined acoustic signatures corresponding to the components of the signal processing device. The controller can then determine the patient's interface based on a comparison of the acoustic signature to the set. The system may be configured to identify the interface and / or air circuit.

[0033] In some implementations, the device transmits sound from a pressure generator along an air circuit. The attenuation structure may include an attenuation structure configured to reduce reflections. To change the acoustic impedance between the air circuit and the cavity of the housing of the pressure generator. The attenuation structure may be formed by a pass-through attenuation conduit configured with a hose. The horn may have a conical shape. The controller creates a pressure generator based on the identified patient interface and / or air circuit. The device may be further configured to adjust a control parameter for moving the device.

[0034] In some implementations of the present technology, a processor associated with a respiratory treatment device The present invention provides a method for identifying components of an air path connected to a respiratory treatment device. This method uses a sound signal representing the sound in the air path to obtain the cepstrum. The method may include processing the signal to derive an acoustic signature from the cepstrum. The method may include isolating the plurality of acoustic signatures to generate the plurality of acoustic signatures. The method can include repeating the treatment and separation at least once. It can include combining acoustic signatures into a composite acoustic signature. This method can include comparing the composite acoustic signature to a set of predetermined acoustic signatures corresponding to each component. This method can include identifying components based on this comparison of this acoustic signature with this set.

[0035] In some implementations, this combining can include aligning one or more of these multiple acoustic signatures with the composite acoustic signature. This combining can include averaging the multiple acoustic signatures. This component can be a patient interface. This repeating can be synchronized with the breathing cycle of a patient wearing the patient interface. This combining can be robust to variations in delays between these multiple acoustic signatures. This processing can include flattening the spectrum of an audio signal. This flattening can include subtracting a low-pass filtered logarithmic spectrum from the logarithmic spectrum of the audio signal. This method can include adjusting control parameters for operating a pressure generator of a respiratory therapy device based on the identification.

[0036] Some implementations of the present technology can include a computer-readable medium having computer-readable instructions encoded thereon that, when executed by a processor of a controller of a respiratory therapy device, cause the processor to execute any one or more of the methods (plural possible) or aspects described herein.

[0037] Some embodiments of the present technology can include a device that generates respiratory therapy. This device can include a pressure generator configured to generate pressurized air that is supplied from an outlet along an air circuit to a patient interface. This device can include a sensor configured to generate a sound signal representative of the sound of the pressure generator within the air circuit. The device can include a controller. The controller can be configured to process the sound signal to obtain a cepstrum. The controller can be configured to separate an acoustic signature from this cepstrum. This controller can be configured to repeat the processing and separation at least once to generate a plurality of acoustic signatures. This controller can be configured to concatenate this plurality of acoustic signatures into a composite acoustic signature. This controller can be configured to compare this composite acoustic signature with a set of predetermined acoustic signatures corresponding to each component. The controller can be configured to identify the patient interface and / or the air circuit based on the comparison of this acoustic signature with this set. In some implementations, the device can include an attenuation structure configured to reduce reflection of sound from the pressure generator along the air circuit. This attenuation structure can be formed by a pass-through attenuation duct configured to vary the acoustic impedance between the air circuit and the cavity of the housing of the pressure generator. This attenuation structure can be formed by a horn. The horn can have a conical shape. This plurality of acoustic signatures

[0038] ​​​​​​​​​​​​​To combine the tones, the controller can be configured to match one or more of these multiple acoustic signatures to the composite acoustic signature. To combine the multiple acoustic signatures, the controller can be configured to equalize the multiple acoustic signatures. The controller can be further configured to adjust control parameters for operating a pressure generator based on the identified patient interface and / or air circuit. The methods, systems, devices, and apparatuses described herein enable improvement of functions in a processor (e.g., the processor of a special-purpose computer, a respiratory monitor, and / or a respiratory therapy device). Further, the described methods, systems, devices, and apparatuses enable improvement in the technical field of automatic management, monitoring, and / or treatment of respiratory conditions (e.g., sleep disordered breathing). Of course, some of the above aspects may form sub-aspects of the present technology. Also, various ones of the sub-aspects and / or aspects can be variously combined to form further aspects or sub-aspects of the present technology. Other features of the present technology will become apparent in view of the information contained in the following detailed description, summary, drawings, and claims.

Brief Description of the Drawings

[0039] The methods, systems, devices, and apparatuses described herein enable improvement of functions in a processor (e.g., the processor of a special-purpose computer, a respiratory monitor, and / or a respiratory therapy device). Further, the described methods, systems, devices, and apparatuses enable improvement in the technical field of automatic management, monitoring, and / or treatment of respiratory conditions (e.g., sleep disordered breathing). Of course, some of the above aspects may form sub-aspects of the present technology. Also, various ones of the sub-aspects and / or aspects can be variously combined to form further aspects or sub-aspects of the present technology. Other features of the present technology will become apparent in view of the information contained in the following detailed description, summary, drawings, and claims.

Brief Description of the Drawings

[0040] Of course, some of the above aspects may form sub-aspects of the present technology. Also, various ones of the sub-aspects and / or aspects can be variously combined to form further aspects or sub-aspects of the present technology. Other features of the present technology will become apparent in view of the information contained in the following detailed description, summary, drawings, and claims.

Brief Description of the Drawings

[0041] Other features of the present technology will become apparent in view of the information contained in the following detailed description, summary, drawings, and claims.

Brief Description of the Drawings

[0042] Brief Description of the Drawings The present technology is shown by way of non-limiting example in the accompanying drawings. In the drawings, like reference numerals include the following like elements. Of course, some of the above aspects may form sub-aspects of the present technology. Also, various ones of the sub-aspects and / or aspects can be variously combined to form further aspects or sub-aspects of the present technology.

[0043] 4.1 Treatment System

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DETAILED DESCRIPTION OF THE INVENTION

[0044] 5 Detailed Description of Embodiments of the Present Technology Before further elaborating on the present technology, it should be understood that the present technology is not limited to specific embodiments described herein. The terms used in this disclosure are for the purpose of describing specific embodiments described herein and it should also be understood that they are not limiting. For the purpose of describing specific embodiments described herein and it should also be understood that they are not limiting.

[0045] The following description is provided in relation to 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 can be combined with one or more features of another embodiment or other embodiments. Additionally any single feature or combination of features in any of these embodiments can constitute a further embodiment. It should be understood that one or more features of any one embodiment can be combined with one or more features of another embodiment or other embodiments. Additionally any single feature or combination of features in any of these embodiments can constitute a further embodiment. It should be understood that one or more features of any one embodiment can be combined with one or more features of another embodiment or other embodiments. Additionally

[0046] 5.1 Treatment Method In one form, the present technology includes a method for treating a respiratory disease. The method includes the step of applying positive pressure to the inlet of the airway of patient 1000. The method includes the step of applying positive pressure to the inlet of the airway of patient 1000.

[0047] 5.2 Treatment System In one form, the present technology includes a system for treating a respiratory disease. A respiratory therapy (RT) system can include a humidifier 5000, an air circuit 4170, and an RPT device 4000 for delivering a positive pressure air supply to patient 1000 via a patient interface 300 0. 0. It can include an RPT device 4000 for delivering a positive pressure air supply to patient 1000 via a patient interface 300

[0048] 5.3 Patient Interface An exemplary non-invasive patient interface 3000 is also shown in FIG. 3 and has the following functional aspects includes a state. That is, a seal forming structure 3100, a plenum chamber 3200, a positioning and stabilizing structure 3300, a ventilation part 3400, a form of connection port 3600 for connection to the air circuit 4170, and a forehead support part 3700. In some forms, the functional state can be provided by one or more physical components. In some forms, one physical component can provide one or more functional states. In use, the seal forming structure 3100 is arranged to surround the inlet of the patient's airway so as to promote the supply of air at positive pressure to the airway.

[0049] A patient interface 3000 according to one form of the present technology is constructed and arranged to provide an air supply at positive pressure to the surroundings, for example , at least 4 cmH2O, or at least 10 cmH2O, or at least 20 cmH 2O, or at least 25 cmH2O.

[0050] 5.3.1 Seal Forming Structure In one form of the present technology, the seal forming structure 3100 can provide a target seal forming surface area and further provide a cushioning function. The target seal forming area is the area where sealing can occur in the seal forming structure 3100. The area where sealing actually occurs (that is, the actual sealing surface) can vary daily by the patient in a given treatment session depending on a range of factors (for example, the placement position of the patient interface on the face, the tension in the positioning and stabilizing structure, and the shape of the patient's face).

[0051] 5.3.2 Plenum Chamber The plenum chamber 3200 is the area where a seal is formed during use on the average person's face​​​​ In use, the plenum chamber has a periphery that is complementary in shape to the surface contour of the The peripheral edge of the cover 3200 is positioned close to the adjacent surface of the face. The contact is provided by the seal-forming structure 3100. The seal-forming structure 3100, in use In some embodiments, the plenum chamber 3200 may extend around the entire edge of the plenum chamber 3200. Thus, the plenum chamber 3200 and the seal-forming structure 3100 are formed from a single homogenous piece of material. The acoustic generator 8500 may be formed as part of the plenum chamber 3200 or It may be formed through the shell of the plenum chamber 3200 .

[0052] 5.3.3 Positioning and stabilizing structures The seal-forming structure 3100 of the patient interface 3000 of the present technology, in use, It can be held in the closed position by a positioning and stabilising structure 3300.

[0053] 5.3.4 Ventilation In one form, the patient interface 3000 is adapted to receive exhaled gas (e.g., dioxygen, The vent 3400 includes a vent constructed and arranged to allow for the extrusion of carbon dioxide (CO2).

[0054] In certain embodiments, the vent 3400 may be configured to reduce the pressure in the plenum chamber relative to the atmosphere. When positive, it allows continuous vent flow from the interior of the plenum chamber 3200 to the atmosphere. The vent 3400 is configured to allow treatment in the plenum chamber to The magnitude of the ventilation flow can reduce the patient's rebreathing of exhaled CO2 while maintaining pressure. The vent 3400 in one embodiment of the present technology is configured to be large enough to accommodate the , including a plurality of holes (e.g., about 20 to about 80 holes, or about 40 to about 60 holes, or about 4 5 to about 55 holes).

[0055] The vent 3400 can be disposed within the plenum chamber 3200. Alternatively, the vent 3 400 is disposed within a disconnect structure (e.g., a swivel).

[0056] 5.3.5 Connection Port The connection port 3600 enables connection to the air circuit 4170 and optionally may include an integrated acoustic generator 8500.

[0057] 5.4 RPT Device A respiratory pressure therapy (RPT) device 4000 according to one aspect of the present technology is shown in the exploded view of FIG. 4A and includes mechanical, pneumatic, and / or electrical components and is configured to execute one or more algorithms 4300. The RPT device 4 000 can be configured to generate an air flow to be delivered to a patient's airway for treatment of one or more of the respiratory conditions described, for example, anywhere in the present document. In one form, the RPT device 4000 is constructed and arranged to be able to deliver an air flow in the range of -20 L / min to +150 L / min while maintaining a positive pressure of at least 4 cmH2O or at least 10 cmH2O or at least 20 cmH2O or at least 25 cmH2O.

[0058] The RPT device can have an external housing 4010. The external housing 4010 is formed by two parts, an upper part 4012 and a lower part 4014. Further, the external housing

[0059] ​​​​​​The G 4010 can include one or more panels 4015. RPT The device 4000 includes a chassis 4016 that supports one or more internal components of the RPT device 4000. The RPT device 4000 can include a handle 4018.

[0060] The pneumatic path of the RPT device 4000 can include one or more air path items and a muffler 4120 (e.g., an inlet air filter 4112, an inlet muffler 4122, a pressure generator 4140 (e.g., a blower 4142) capable of supplying air at positive pressure, an outlet muffler 4124, and one or more transducers 4270 (e.g., a pressure sensor and a flow sensor)). One or more of the air path items can be arranged within a detachable integrated structure called a pneumatic block 4020. The pneumatic block 4020 can be arranged within an external housing 4010. In one form, the pneumatic block 4020 is supported by the chassis 4016 or formed as part of the chassis 4016.

[0061] One or more of the air path items can be arranged within a detachable integrated structure called a pneumatic block 4020. The pneumatic block 4020 can be arranged within an external housing 4010. In one form, the pneumatic block 4020 is supported by the chassis 4016 or formed as part of the chassis 4016.

[0062] The RPT device 4000 can have a power supply 4210, one or more input devices 4220, a central controller 4230, a treatment device controller 4240, a pressure generator 4140, one or more protection circuits 4250, a memory 4260, transducers 4270, a data communication interface 4280, and one or more output devices 4290. The electrical components 4200 can be on a single printed circuit board assembly (PCBA: Printed Circuit Board assembly). ​​​​​​​​d Assembly) can be mounted on 4202. In an alternative form, the RPT device 40 00 can include more than one PCBA 4202.

[0063] 5.4.1 RPT Device Mechanical and Pneumatic Components The RPT device can include one or more of the following components in an integrated unit In an alternative form, one or more of the following components can be arranged as separate units.

[0064] 5.4.1.1 Pressure Generator In one form of the technology, the pressure generator 4140 for generating a downstream air flow such as a flow or supplying air in positive pressure is a controllable blower 4142. The blower can supply air delivery at a speed of, for example, up to about 120 liters per minute, at a positive pressure in the range of about 4 cmH2O to about 20 cmH2 O, or in other forms up to about 30 cmH2O. The blower is described in any one of the following patents or patent applications, which are U.S. Patent No. 7,866,944, U.S. Patent No. 8,638,014, U.S. Patent No. 8,636,479, and PCT Patent Application Publication WO2013 / 020167. It should be noted that the entire above-mentioned document is incorporated herein by reference and forms part of this specification.

[0065]

[0066] The pressure generator 4140 is under the control of the treatment device controller 4240.

[0066] In other forms, the pressure generator 4140 can be a piston-driven pump, a pressure regulator connected to a high-pressure source (e.g., a high-pressure air reservoir), or a bellows. ​

[0067] 5.4.1.2 Memory According to one embodiment of the present technology, the RPT device 4000 includes a memory 4260 (e.g., non-volatile memory). In some embodiments, the memory 4260 may include a battery-powered static RAM. In some embodiments, the memory 4260 may include volatile RAM as well.

[0068] The memory 4260 may be disposed on the PCBA 4202. The memory 4260 may be in the form of EEPRO M or NAND flash.

[0069] Additionally or alternatively, the RPT device 4000 includes a removable memory 4260 ( e.g., a memory card manufactured according to the Secure Digital (SD) standard ).

[0070] In one embodiment of the present technology, the memory 4260 functions as a non-transitory computer-readable storage medium. On this storage medium, computer program instructions or processor control instructions (e.g., one or more algorithms 4300 ) for expressing one or more methods described herein are stored.

[0071] 5.4.1.3 Data Communication System In one embodiment of the present technology, a data communication interface 4280 is provided and connected to the central controller 4230. The data communication interface 4280 can be connected to a remote external communication network 4282 and / or a local external communication network 4284. The remote external communication network 4282 can be connected to a remote external device 4286 and ​It is possible. The local external communication network 4284 may be connectable to the local external device 4288. It may be connectable.

[0072] In one form, the data communication interface 4280 is part of the central controller 4230. In another form, the data communication interface 4280 is separate from the central controller 4230 and may include an integrated circuit or a processor. It may be separate from the central controller 4230 and may include an integrated circuit or a processor.

[0073] In one form, the remote external communication network 4282 is the Internet. The data communication interface 4280 may use wired communication (e.g., via Ethernet or fiber optic) or a wireless protocol (e.g., CDMA, GSM, LTE) to connect to the Internet. It may use wired communication (e.g., via Ethernet or fiber optic) or a wireless protocol (e.g., CDMA, GSM, LTE) to connect to the Internet. It may use wired communication (e.g., via Ethernet or fiber optic) or a wireless protocol (e.g., CDMA, GSM, LTE) to connect to the Internet. (e.g., CDMA, GSM, LTE) to connect to the Internet.

[0074] In one form, the local external communication network 4284 uses one or more communication standards (e.g., Bluetooth® or Consumer Infrared Protocol). For example, Bluetooth® or Consumer Infrared Protocol.

[0075] In one form, the remote external device 4286 is one or more computers (e.g., a cluster of networked computers). In one form, the remote external device 4286 may be a virtual computer rather than a physical computer. In either case, such a remote external device 4286 may be accessible by appropriately authorized persons (e.g., clinicians). For example, a cluster of networked computers. In one form, the remote external device 4286 may be a virtual computer rather than a physical computer. In either case, such a remote external device 4286 may be accessible by appropriately authorized persons (e.g., clinicians). It may be a virtual computer rather than a physical computer. In either case, such a remote external device 4286 may be accessible by appropriately authorized persons (e.g., clinicians). It may be accessible by appropriately authorized persons (e.g., clinicians). It may be accessible by appropriately authorized persons (e.g., clinicians).

[0076] The local external device 4288 is a personal computer, a mobile computing device such as a smartphone or a tablet device, or a remote control. It is a personal computer, a mobile computing device such as a smartphone or a tablet device, or a remote control. It is possible.

[0077] 5.4.2 RPT Device Algorithm As described above, in some forms of the present technology, the central control device 4230 is configured to implement one or more algorithms 4300 expressed as a computer program stored in a non-temporary computer-readable storage medium (for example, the memory 4260). It can be obtained. These algorithms 4300 are generally grouped into groups called modules. This is common.

[0078] 5.5 Humidifier 5.5.1 Overview of the Humidifier In one form of the present technology, the RT system includes a humidifier 5000 for changing the absolute humidity of the air to be delivered to the patient by comparing it with the absolute humidity of the ambient air, between the RPT device 4000 and the air circuit 4170 (shown in FIG. 4A). Typically, the humidifier 5000 is used to increase the absolute humidity (relative to the ambient air) and the temperature of the air flow before it is delivered to the patient's airway.

[0079] The humidifier 5000 can include (for example, as shown in FIG. 5A) a humidifier reservoir 5110, a humidifier inlet 5002 for receiving the air flow, and a humidifier outlet 5004 for delivering the humidified air flow. In some forms as shown in FIGS. 5A and 5B, the inlet and outlet of the humidifier reservoir 5110 can be the humidifier inlet 5002 and the humidifier outlet 5004, respectively. The humidifier 5000 can further include a humidifier base 5006. The humidifier base 5006 can be adapted to receive the humidifier reservoir 5110 and can include a heating element 5240. ​

[0080] 5.5.2 Components of the Humidifier 5.5.2.1 Water Reservoir According to one arrangement, the humidifier 5000 includes a water reservoir 5110 configured to contain or hold a constant amount of liquid (e.g., water) to be evaporated for humidifying the air flow. The water reservoir 5110 can be configured to contain a predetermined maximum amount of water to provide adequate humidification over at least the duration of a respiratory therapy session (e.g., overnight 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 other forms, the humidifier 5000 can be configured to receive a water supply from an external water source (e.g., a building water supply system).

[0081] According to one aspect, 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 is configured to promote the movement of the air flow through a meandering path in the reservoir 5110 while the air flow is in contact with a fixed amount of water in the reservoir 5110.

[0082] According to one form, the reservoir 5110 is removable from the humidifier 5000 horizontally, as shown, for example, in FIGS. 5A and 5B.

[0083] The reservoir 5110 is displaceable and / or rotatable from its normal operating orientation (e.g., through any aperture and / or between its sub-components), for example. ​​​​​​​​​​It can also be configured to suppress liquid discharge from the reservoir 5110 at times. Humidifier Since the air flow to be humidified by the humidifier 5000 is often pressurized, the reservoir 511 0 can also be configured to prevent air pressure loss through leakage and / or flow impedance. It can be done.

[0084] 5.5.2.2 Conductive part According to one arrangement, the reservoir 5110 includes a conductive portion 5120 configured to enable efficient heat transfer to a certain amount of liquid in the reservoir 5110 from the heating element 5240. In one form, the conductive portion 5120 can be arranged as a plate, but other shapes may also be suitable. The whole or part of the conductive portion 5120 can be made of a heat-conductive material such as aluminum (e.g., about 2 mm thick (e.g., 1 mm, 1.5 mm, 2.5 m m or 3 mm)), another heat-conductive metal or some plastic. In some cases, appropriate heat conductivity can be achieved by a lower-conductivity material with an appropriate geometry. It can be done. In some cases, appropriate heat conductivity can be achieved by a lower-conductivity material with an appropriate geometry. It can be done.

[0085] 5.5.2.3 Humidifier reservoir dock In one form, the humidifier 5000 can include a humidifier reservoir dock 5130 configured to receive the humidifier reservoir 5110 (as shown in FIG. 5B). In some arrangements, the humidifier reservoir dock 5130 can include a locking function (e.g., a locking lever 5 configured to hold the reservoir 5110 within the humidifier reservoir dock 5130). 135). 135).

[0086] 5.5.2.4 Water level indicator The humidifier reservoir 5110 can include a water level indicator 5150 as shown in FIGS. 5A-5B. In some forms, the water level indicator 5150 can provide one or more indications about the amount of water in the humidifier reservoir 5110 to a user such as the patient 1000 or caregiver. These one or more indications provided by the water level indicator 5150 can include a maximum indication, an indication of a predetermined amount of water, or an indication of any portion thereof (e.g., 25%, 50%, or 75%, or an amount such as 200 ml, 300 ml, or 400 ml).

[0087] 5.5.2.5 Humidifier Transducer(s) The humidifier 5000 can include one or more humidifier transducers (sensors) 5210 instead of or in addition to the transducer 4270 described above. The humidifier transducer 5210 can include one or more of an air pressure sensor 5212, an air flow transducer 5214, a temperature sensor 5216, or a humidity sensor 5218. The humidifier transducer 5210 can generate one or more output signals. These output signals can communicate to a controller (e.g., the central controller 4230 and / or the humidifier controller 5250). In some forms, the humidifier transducer can communicate the output signals to the controller 5250 while being disposed external to the humidifier 5000 (e.g., within the air circuit 4170).

[0088] 5.6 Air Circuit An air circuit 4170 according to one aspect of the technology has a pressurized air flow during use that is in two compartments ​​​​​​​​​​​configured to move between components (e.g., the humidifier 5000 and the patient interface 3000). a conduit or tube constructed and arranged to

[0089] Specifically, the air circuit 4170 may be in fluid communication with the outlet 5004 of the humidifier 5000 and the plenum chamber 3200 of the patient interface 3000.

[0090] 5.7 Transducer(s) The RT system may include one or more transducers (sensors) 4270 configured to measure one or more of any number of parameters related to the RT system, its patient, and / or its environment. The transducer can be configured to produce an output signal representative of one or more of the parameters for which the transducer is configured to measure .

[0091] This output signal can be one or more of any number of other signals known in the art, such as an electrical signal, a magnetic signal, a mechanical signal, a visual signal, an optical signal, an acoustic signal, etc.

[0092] The transducer can be integrated with other components of the RT system, and one exemplary arrangement is where the transducer is built into the RPT device . Another exemplary arrangement would be where the transducer is substantially a "stand-alone" component of the RT system and the transducer is external to the RPT device .

[0093] The transducer is configured to transmit its output signal to one or more components of the RT system, such as the RPT device, a local external device, or a remote external device ​​​It is possible. The external transducer can be arranged, for example, on a patient interface or an external computing device such as a smart phone. The external transducer can be arranged, for example, on an air circuit or can form part of the air circuit (e.g., patient interface). One or more transducers 4270 can be constructed and arranged to generate a signal indicative of a property of air (e.g., flow rate, pressure or temperature). The air can be air flow from the RPT device to the patient, air flow from the patient to the atmosphere, ambient air, or other possible ones. The signal can represent the nature of the air flow at a specific point, such as the air flow in the air pressure path between the RPT device and the patient. In one form of the present technology, one or more transducers 4270 can be located in the air pressure path of the RPT device, such as downstream of the humidifier 5000. 5.7.1 Pressure Sensor According to one aspect of the present technology, one or more transducers 4270 include a pressure sensor located in fluid communication with the air pressure path. An example of a suitable pressure sensor is a transducer from the ASDX series manufactured by HONEYWELL. Another suitable pressure sensor is a transducer from the NPA series from GENERAL ELECTRIC. In one embodiment, the pressure sensor is located in the air circuit 4170 adjacent to the outlet 5004 of the humidifier 5000.

[0094]

[0095]

[0096] The pressure sensor (microphone) 4270 is configured to generate a sound signal representing a change in pressure within the air circuit 4170. The sound signal from the microphone 4270 is as follows​​​​​​​​​​​​​​​ As configured by one or more of the algorithms 4300 to be described, it can be received by the central controller 4230 for acoustic processing and analysis. The microphone 4270 can be directly exposed to the air path to enhance its sensitivity to sound and can also be encapsulated behind a thin layer of flexible membrane material. This membrane can function to protect the microphone 4270 from heat and / or moisture.

[0097] 5.8 Acoustic Analysis According to one or more aspects of the present technology, acoustic analysis can be used for the purpose of determining one or more parameters related to a respiratory disease or a system for the treatment of a respiratory disease .

[0098] Acoustic analysis according to aspects of the present technology can have one or more advantages over the prior art, such as reducing treatment costs, providing higher-quality treatment, improving the usability of treatment systems, reducing waste, and providing low-cost digital connectivity.

[0099] As will become apparent in the remainder of the context of this document, the terms "acoustic", "sound", and "noise" in this document are generally intended to include air vibrations regardless of whether they can be heard. Therefore, the terms "acoustic", "sound", and "noise" in this document are intended to include air vibrations in the ultrasonic or subsonic regions unless otherwise stated.

[0100] Some implementations of the disclosed acoustic analysis technology can perform cepstrum analysis. Cepstrum is, for example, the logarithmic spectrum of the forward Fourier transform of the decibel spectrum can be regarded as an inverse Fourier transform. By this operation, the convolution of the impulse response function (IRF) and the sound source can be substantially converted into an addition operation, whereby the sound source can then be easily accounted for or removed so that the IRF data can be separated for analysis. The technique of cepstrum analysis is described in detail in the following scientific literature: Title: "The Cepstrum: A Guide to Processing" (Childers et al., Proceedings of the IEEE, Vol. 65, No. 10, Oct 1977), and Randall RB, Frequency Analysis, Copenhagen: Bruel & Kjaer, p. 344 (1977, revised ed. 1987). Regarding the application of cepstrum analysis to the characteristics of respiratory treatment system components, it is described in PCT Publication No. WO2010 / 091462 Title: "Acoustic Detection for Respiratory Treatment Apparatus", the entire content of which is incorporated herein by reference.

[0101] Cepstrum analysis can be understood from the nature of convolution. The convolution of f and g can be denoted as f * g. This operation can be an integration after the product of the two functions (f and g) is reversed and shifted. Therefore, it is a kind of integral transform as follows.

Equation

[0102] Although the symbol t is used in the above equation, it is not necessary to represent the time domain. However, in that The convolution can be described as the weighted average of the function f(τ) at the instant t, where the weight is given by g(-τ) simply shifted by the amount t. As t changes, this weighted function emphasizes different parts of the input function.

[0103] A mathematical model that can relate the input to the output of a time-invariant linear acoustic system, such as the pneumatic path of a respiratory therapy system (time-invariant linear acoustic system), can be based on convolution. The sound signal generated by the microphone 4270 in the air circuit 4170 is regarded as the input sound signal "convolved" with the system impulse response function (IRF) as a function of time (t). inear acoustic system) can be based on convolution. The sound signal generated by the microphone 4270 in the air circuit 4170 is regarded as the input sound signal "convolved" with the system impulse response function (IRF) as a function of time (t). y(t)=s1(t)*h1(t) (2) In the equation, y(t) is the output sound signal generated by the microphone 4270, s 1(t) is the input sound signal such as the sound generated in or by the pressure generator 4140 of the respiratory therapy device 4000, and h1(t) is the system IRF from the sound source to the microphone 427 0. The system IRF h1(t) can be considered as the system response to a unit impulse input (

[0104] unit impulse input). 1(t) is the input sound signal such as the sound generated in or by the pressure generator 4140 of the respiratory therapy device 4000, and h1(t) is the system IRF from the sound source to the microphone 427 0. The system IRF h1(t) can be considered as the system response to a unit impulse input ( unit impulse input). unit impulse input).

[0105] Applying the Fourier transform (e.g., discrete Fourier transform ("DFT" ") or fast Fourier transform ("FFT")) to the sound signal y(t) and converting it to the frequency domain, and considering the convolution theorem results in the following equation. Y(f)=S1(f)H1(f) (3)

[0106] where Y(f) is the Fourier transform (spectrum) of y(t), S1(f) is the Fourier transform of s1( t), and H1(f) is the Fourier transform of h1(t). In other words, convolution in the time domain becomes multiplication in the frequency domain.

[0107] A logarithmic operation can be applied to Equation (3) so that multiplication is converted to addition. Log{Y(f)} = Log{S1(f)} + Log{H1(f)} (4)

[0108] Equation (4) is transformed back to the time domain by the inverse Fourier transform (IFT) (e.g., inverse DFT or inverse FFT), and becomes a complex-valued "Cepstrum" (inverse Fourier transform of the logarithm of the spectrum Y( f)). The abscissa τ of the [number] is a real-valued variable called quefrency, and the measurement

number

[0109] unit is seconds. Therefore, the effect that is convolution in the time domain becomes additive in the logarithm of the spectrum, and remains the same in the cepstrum and quefrency domains. In particular, the output cepstrum is composed of two additive components: the cepstrum of the input signal s1(t) output cepstrum

number

number

number

[0110] Examining data values in the cepstrum region and considering cepstrum analysis data, etc., can provide information regarding the RT system. For example, by comparing the cepstrum data of the system with a previous baseline or a known baseline of the cepstrum data of that system, differences or similarities in the system that can be used to perform automatic control for various functions or purposes can be recognized using comparisons such as differences. More information regarding the RT system can be provided. For example, by comparing the cepstrum data of the system with a previous baseline or a known baseline of the cepstrum data of that system, differences or similarities in the system that can be used to perform automatic control for various functions or purposes can be recognized using comparisons such as differences. The cepstrum data of the system can be compared with a previous baseline or a known baseline of the cepstrum data of that system to recognize differences or similarities in the system that can be used to perform automatic control for various functions or purposes using comparisons such as differences. By comparing with a previous baseline or a known baseline of the cepstrum data of the system, differences or similarities in the system that can be used to perform automatic control for various functions or purposes can be recognized using comparisons such as differences. Differences or similarities in the system that can be used to perform automatic control for various functions or purposes can be recognized using comparisons such as differences.

[0111] 5.8.1 Identification of Components As described above, a respiratory therapy system can typically include an RPT device, a humidifier, an air delivery conduit, and a patient interface. Various different forms of patient interfaces can be used with a given RPT device (e.g., nasal pillows, nasal prongs, nasal masks, nasal and oral (nasal-oral) masks, or full-face masks). Further, different forms of air delivery conduits can be used. Even in a general form, there can be differences in design specifications such as size and / or shape in various models of the form of the patient interface (e.g., various nasal masks). For improving the control of treatment delivery to the patient interface, it can be advantageous to measure or estimate treatment parameters (e.g., pressure and ventilation flow in the patient interface). In a system that uses an estimate of the treatment pressure, knowing the type of component the patient is using can improve the accuracy of the estimate of the treatment pressure, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., nasal pillows, nasal prongs, nasal masks, nasal and oral (nasal-oral) masks, or full-face masks) can be used with a given RPT device. Further, different forms of air delivery conduits can be used. Even in a general form, there can be differences in design specifications such as size and / or shape in various models of the form of the patient interface (e.g., various nasal masks). (e.g., nasal pillows, nasal prongs, nasal masks, nasal and oral (nasal-oral) masks, or full-face masks) can be used with a given RPT device. Further, different forms of air delivery conduits can be used. Even in a general form, there can be differences in design specifications such as size and / or shape in various models of the form of the patient interface (e.g., various nasal masks). For improving the control of treatment delivery to the patient interface, it can be advantageous to measure or estimate treatment parameters (e.g., pressure and ventilation flow in the patient interface). In a system that uses an estimate of the treatment pressure, knowing the type of component the patient is using can improve the accuracy of the estimate of the treatment pressure, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., various nasal masks) can have differences in design specifications such as size and / or shape. For improving the control of treatment delivery to the patient interface, it can be advantageous to measure or estimate treatment parameters (e.g., pressure and ventilation flow in the patient interface). In a system that uses an estimate of the treatment pressure, knowing the type of component the patient is using can improve the accuracy of the estimate of the treatment pressure, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., pressure and ventilation flow in the patient interface) can be advantageous. In a system that uses an estimate of the treatment pressure, knowing the type of component the patient is using can improve the accuracy of the estimate of the treatment pressure, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., pressure and ventilation flow in the patient interface) can be advantageous. In a system that uses an estimate of the treatment pressure, knowing the type of component the patient is using can improve the accuracy of the estimate of the treatment pressure, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). By knowing the type of component the patient is using, the accuracy of the estimate of the treatment pressure can be improved, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). By knowing the type of component the patient is using, the accuracy of the estimate of the treatment pressure can be improved, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). By knowing the type of component the patient is using, the accuracy of the estimate of the treatment pressure can be improved, thereby enhancing the effectiveness of the treatment. To grasp this, some RPT devices include a menu system that enables the patient to select the type of system component (e.g., the patient interface being used) (e.g., brand, form, model, etc.). The patient can select the component (e.g., brand, form, model, etc.). A menu system that enables the patient to select the type of system component (e.g., the patient interface being used) is included. The patient can select the component When the type is input, the RPT device controller can select the appropriate operating parameters of the RPT device that collaborates optimally with the selected component.

[0112] This technology can provide improvements to known devices to facilitate the cooperation between the RPT device and the peripheral components of the RT system for identifying the components of the RT system based on acoustic analysis. As used herein, "identifying" a component means identifying the type of that component so as to distinguish it from other different (e.g., pneumatically different) types of components that can be used in the RT system. After that, such identification can permit access to data associated with the identification, such as the pneumatic characteristics applicable in its pneumatic control (e.g., treatment control) by the controller of the RT device. Although there are patient interfaces that are not normally referred to as "masks", in the following content, for the sake of simplicity, "mask" is used synonymously with "patient interface".

[0113] The first embodiment of this technology comprises a device, apparatus, and / or method for identifying components (s) within a respiratory therapy system. These components can be a mask and a conduit. This embodiment can identify the length of the conduit in use in addition to the mask connected to the conduit. This technology can identify the mask and the conduit regardless of whether the patient is wearing the mask during identification.

[0114] This technology is based on the audio signal generated by the microphone 4270 arranged as described above. An analysis of the number may be performed.

[0115] The analysis methods included in the present technology allow for the analysis of other system noises and responses (including, but not limited to, This allows the separation of the reflection of the acoustic mask from the sound of the blower, for example. Between the acoustic reflections of the mask (which often depend on the mask's shape, construction and material) This allows for the identification of differences between different The mask can be specified.

[0116] An example method for identifying a mask is shown in FIG. Let (t) be sampled at the desired sampling rate, e.g., 20 kHz, at or above the Nyquist rate. The cepstrum

number

[0117] Alternatively, using the same method, the length of the conduit can be determined by finding the delay between the sound received from the RPT device and the reflection from the mask. This delay can be proportional to the length of the conduit For example. In addition, changes in the pipe diameter can expand or contract the amplitude of the reflected signal, and thus are distinguishable. Such an evaluation is performed by comparing the current reflection data with the previous reflection data . Changes in diameter can be regarded as the rate of change of the amplitude from the reflected signal (i.e., the reflection data)

[0118] FIG. 7 is a schematic diagram of an RT system 7000 according to one aspect of the present technology. In this exemplary embodiment shown in FIG. 7, a conduit 7010 (of length L) effectively functions as an acoustic waveguide for sounds generated by an RPT device 7040, such as sound from a speaker, or alternatively, only the operating noise of a blower (e.g., a motor and / or an impeller). In this exemplary embodiment, the input signal is the sound emitted by the RPT device 7040 (i.e., without the sound from the speaker). This input signal (e.g., an impulse) enters a microphone 7050 located at one end of the conduit 701 0, travels along the air path in the conduit 7010 to the mask 7020, reflects back along the conduit 7010 due to the characteristics of the air path (including the conduit and the mask), and enters the microphone 7050 again. Therefore, the system IRF (output signal created by the input impulse) contains an input signal component and a reflection ​​​​​​​The main feature of the RT System 7000 is that sound is directed from one end of the air path to the other. The time it takes for the microphone 7050 to move from one end to the other. 7040 and after a short time, is filtered by conduit 7010 Receives the ringed input signal and mask 7020 (and potentially mask 70 20 is attached to the patient, such as the human respiratory system. This spacing is required for the system to reflect and filter the light. This is manifested in the IR F of the mask, which is associated with reflections from the mask end of the conduit 7010. The reflected components of the system IRF are reflected by the microcomputer after a relatively short delay. The components of the system IRF associated with the input signal arriving at the Phong 7050 ( This means that the delay is relative to the input signal component. (In practice, this short delay can be ignored. Time zero can be approximated as the moment when the microphone 7050 first reacts to the input signal. The delay is equal to 2L / c, where L is the length of the conduit and c is the speed of sound in the conduit.

[0119] Another feature of the System 7000 is that the length of the conduit is small, as air paths are prone to losses. is sufficient, the input signal of the system IRF will be If this is the case, the input The signal component can be separated from the reflected component of the system IRF. As an example, FIG. 8 shows an input signal One such system from an example treatment system in which the fan 4142 of the RPT device may be derived. Alternatively, the input signal can be a signal from a speaker at the device end of the air path. It may include the sound emitted from a speaker (accompanied by the sound generated by the RPT device 7040 or may not). Fig. 8 shows how the reflection component 8020 of the system IRF appears from the input signal component 8010 of the system IRF with a delay equal to 2L / c.

[0120] The cepstrum of the system IRF associated with the above-mentioned equations (2), (4), and (5) Cepstrum

Number

Number

Number

Number

[0121] . That is, the input signal component of the cepstrum

Number

Number

[0122] Figure 9 depicts the real parts of various cepstrum examples obtained from measurements of a treatment system implemented using three different masks, such as the system of Figure 7, where the input signal is the sound produced by an R PT device blower. Each mask in this example was tested at two different blower operating speeds of 10 krpm and 15 krpm. These speeds were used in these examples, but in particular, this technique can be implemented at other blower speeds if the resulting sound is detectable by the microphone 7050. In these examples, these speeds were used, but in particular, this technique can be implemented at other blower speeds if the resulting sound is detectable by the microphone 7050. In these examples, these speeds were used, but in particular, this technique can be implemented at other blower speeds if the resulting sound is detectable by the microphone 7050. In these examples, these speeds were used, but in particular, this technique can be implemented at other blower speeds if the resulting sound is detectable by the microphone 7050.

[0123] In Figure 9, it can be clearly confirmed that the reflection component starts from around 12 milliseconds (12 ms) of quefrency in all six cepstrums. In this treatment system example, a 2-meter duct is used, and since the speed of sound is 343 m / s, this position is as expected and can be clearly confirmed that the reflection component starts from around 12 milliseconds (12 ms) of quefrency in all six cepstrums. In this treatment system example, a 2-meter The graph in Figure 9 shows the cepstrum from the mask, from top to bottom. It is shown in the introduction. ResMed Ultra Mirage® tested at 10krpm, ResMed Ultra Mirage® tested at -15krpm; ResMed Mirage Quattro (registered trademark) tested at -10krpm ), ResMed Mirage Quattro (registered trademark) tested at -15krpm ), ResMed Swift II® tested at 10k rpm, and ResMed Swift II® tested at -15krpm.

[0124] By lengthening the conduit, the arrival delay of the reflection from the mask can also be increased significantly. This delay increase, compared to, is in accordance with the calculations described above which generate an approximation of the conduit length.

[0125] With this technology, it is possible to obtain reflection components such as the data shown in the center of the cepstrum in Figure 9. The data associated with the mask reflection component is a set of previously identified mask reflection components or mask reflections. From a set of predefined acoustic signatures, such as those contained in a memory or database of components Such a set may be compared to similar data obtained from previously identified such masses. Data from one or more of the reflectance components may be included.

[0126] For example, the reflective component of the mask under test (the "mask signature") is captured by a microphone. This mask signature can be separated from the cepstrum of the generated output signal. For example, to verify the identity of a mask, a previously stored data template for the device is used. It can be compared with the reflection component of the previous mask signature of the known mask or a predetermined mask signature . One of the methods is to calculate the cross-correlation between the mask signature of the mask under test and the mask signatures previously stored for all known masks or data templates. The cross-correlation with the highest peak is likely to correspond to the mask under test, and the position of the peak should be proportional to the length of the conduit .

[0127] However, by increasing the correlation points, the accuracy of the identification step of the present technology can also be improved . Therefore, additional data points can be utilized. Optionally, a least-squares algorithm using test data and known data sets can be implemented in the identification of components . Further, in some embodiments, additional feature extraction and recognition techniques based on artificial intelligence / machine learning structures and strategies such as neural networks and support vector machines can be utilized . Also, to improve the identification accuracy of components, other information sources can also be included as inputs to such structures and strategies. Specific examples include patient characteristics , treatment data, historical information such as previously identified components, geographical location, and related market data such as the sales volume of various components .

[0128] One factor that complicates the identification of acoustic components is the acoustic "back-reflection" from the device side of the conduit 7010 . These back-reflections occur after the sound reflected from the mask 7020 returns along the conduit 7010, and then the acoustic impedance between the conduit 7010 and the internal cavity of the RPT device / humidifier 7040 to which the conduit 7010 is connected is such that As a result of the change, it occurs from the device end of the conduit 7010. Such back reflections can affect the acoustic signature. For example, when the dimensions of the component being identified are of a physical scale similar to the distance between the microphone 7050 and any discontinuity in the cross-section inside the RPT device / humidifier 7040, reflections from the component can superimpose on the output signal in the response of the back reflection.

[0129] Figure 10 depicts a graph showing this effect. Trace 1050 is the output cepstrum associated with the sound transmitted from the microphone to the component to be identified, and the sound reflected back from that component to the microphone, including a distinct peak 1060 in the cepstrum at the cepstrum trace 1050. The cepstrum trace 1050 also includes a distinct trough 1070 at the cepstrum associated collectively with (a) the sound transmitted from the microphone to the component, (b) the reflection from the component down the conduit and back to the blower device end of the conduit, and (c) the back reflection from the blower device end to the microphone.

[0130] In some cases, the identification accuracy of the component may be improved by characterizing the back reflection and deconvolving from the reflected components. Alternatively, if the back reflection can be reduced or minimized by design, the identification accuracy of the component may be improved. In the latter case, it becomes complex due to the need to maintain an open path from the blower end to the patient interface so that the waveguide formed by the treatment conduit can be supplied with treatment pressure.

[0131] In one such implementation 1105 shown in FIG. In addition, the end of the conduit 1110 that is distal to the patient's respiratory airway 1130 is preferably adapted to reduce back reflections. The dampening structure 1160 is configured to The structure of the structure is generally open to allow passage for (therapeutic) airflow and sound. Such a pass-through attenuation conduit may be considered a pass-through (acoustic) attenuation conduit. The structure may be a transitional conduit passageway having an interior surface that defines a cross-section of the passageway through the structure, The cross section of the duct passage is arranged along the sound or air flow path of the duct passage, for example, linearly, depending on the shape of the inner surface. As shown, the structure 1160 has a microphone connected to the structure along a conduit and to the patient. Along the conduit between the microphone and the blower, so that it comes between the The embodiment of structure 1160 in FIG. 11 may be arranged such that its diameter is the same as the diameter of conduit 1110. 1110, which may be the same device end, e.g., away from the identified component. RPT devices / operators that have a gradually increasing cross-section or transverse dimension (e.g., diameter) in the direction 1140. In this regard, the structure is shown as a horn extending into the interior cavity of the humidifier 1140. The cross section of the structure 1160 is such that the cross section is located at the patient interface end of the patient circuit due to its inner shape. The acoustic impedance of the acoustic waveguide increases with distance from the waveguide. As it relates to dimensions (e.g., diameter), the horn structure 1160 is a conduit, unlike an absorber. The change in acoustic impedance between 1110 and the cavity of the RPT device / humidifier 1140 The gentle slope minimizes back reflections. The horn structure 1160 is shown in FIG. It may be conical as shown in Fig. 11A, and the shape of the horn may be curved like that of the bell of a brass instrument in the example of Fig. 11B. The effect of the structure 1160 is to enhance the discriminability of the system component by reducing the rear reflection component in the acoustic signature of the system component 1120. The cepstrum can be calculated over a finite time window of the sampled output signal y(t). The longer the window, the cleaner the separation between the acoustic signature and the input signal components can occur. However, since the acoustic characteristics of the air path can change over time due to factors such as the pressure during the inhalation and exhalation cycles, and / or the flow rate during the breathing cycle, and / or the humidity during the breathing cycle, etc., when evaluated by the patient during use, this window should not be made as long as a significant change in the air path characteristics is expected midway. In one example, the duration of the window is 200 ms. Before calculating the cepstrum by performing the IFT of equation (5), subtracting the moving average of the logarithmic spectrum Log{Y(f)} from the logarithmic spectrum Log{Y(f)} itself, such as subtracting the moving average of the logarithmic spectrum Log{Y(f)} from Log{Y(f)}, can flatten the overall shape of the logarithmic spectrum, and the sensitivity of the separation of the acoustic signature to the randomness of the input signal s1(t) can decrease. That is, due to such flattening, even if the input signal s1(t) is not of a particularly random nature, the output cepstrum near the origin (τ = 0)

[0132]

[0133]

Number

Number

number

number

number

number

[0134] Multiple Output Cepstra

number

[0135] To minimize the variable effect of the breathing cycle on the acoustic characteristics of the air path, and thus the variability of the acoustic signature at the window space, the window timing can be adjusted to coincide (synchronize) with specific points in the breathing cycle, such as the peak of the intake flow or the pause at the end of exhalation. To minimize the variable effect of the breathing cycle on the acoustic characteristics of the air path, and thus the variability of the acoustic signature at the window space, the window timing can be adjusted to coincide (synchronize) with specific points in the breathing cycle, such as the peak of the intake flow or the pause at the end of exhalation. To minimize the variable effect of the breathing cycle on the acoustic characteristics of the air path, and thus the variability of the acoustic signature at the window space, the window timing can be adjusted to coincide (synchronize) with specific points in the breathing cycle, such as the peak of the intake flow or the pause at the end of exhalation. In a similar manner, the window can be synchronized with a specific shaft rotation speed of the RT device to reduce or emphasize the impact of the rotating machine on the signature. In some embodiments, the acoustic analysis can include the diagnosis or prediction of the mechanical state, such as the failure of the bearing. In a similar manner, the window can be synchronized with a specific shaft rotation speed of the RT device to reduce or emphasize the impact of the rotating machine on the signature. In some embodiments, the acoustic analysis can include the diagnosis or prediction of the mechanical state, such as the failure of the bearing. In a similar manner, the window can be synchronized with a specific shaft rotation speed of the RT device to reduce or emphasize the impact of the rotating machine on the signature. In some embodiments, the acoustic analysis can include the diagnosis or prediction of the mechanical state, such as the failure of the bearing.

[0136] Even in such "breathing-synchronized" embodiments, other sources of air path variability between the windows can affect the relative delay of each acoustic signature in the Kevlar region. Depending on how the acoustic signatures are combined, the composite acoustic signature may become unclear or blurred, affecting its differentiability. Even in such "breathing-synchronized" embodiments, other sources of air path variability between the windows can affect the relative delay of each acoustic signature in the Kevlar region. Depending on how the acoustic signatures are combined, the composite acoustic signature may become unclear or blurred, affecting its differentiability. Even in such "breathing-synchronized" embodiments, other sources of air path variability between the windows can affect the relative delay of each acoustic signature in the Kevlar region. Depending on how the acoustic signatures are combined, the composite acoustic signature may become unclear or blurred, affecting its differentiability. Even in such "breathing-synchronized" embodiments, other sources of air path variability between the windows can affect the relative delay of each acoustic signature in the Kevlar region. Depending on how the acoustic signatures are combined, the composite acoustic signature may become unclear or blurred, affecting its differentiability.

[0137] Therefore, in some implementations, a strong combination method can be selected that is insensitive to small variations in the delay (relative shift along the Kevlar axis) between multiple acoustic signatures. Therefore, in some implementations, a strong combination method can be selected that is insensitive to small variations in the delay (relative shift along the Kevlar axis) between multiple acoustic signatures. In one such embodiment, the newly calculated acoustic signatures are incorporated one by one into the composite acoustic signature, gradually constructing the composite acoustic signature from each newly calculated acoustic signature. To achieve this incorporation, each newly calculated acoustic signature can be compared with the composite acoustic signature to estimate the delay with respect to the composite acoustic signature. In one such embodiment, the newly calculated acoustic signatures are incorporated one by one into the composite acoustic signature, gradually constructing the composite acoustic signature from each newly calculated acoustic signature. To achieve this incorporation, each newly calculated acoustic signature can be compared with the composite acoustic signature to estimate the delay with respect to the composite acoustic signature. In one such embodiment, the newly calculated acoustic signatures are incorporated one by one into the composite acoustic signature, gradually constructing the composite acoustic signature from each newly calculated acoustic signature. To achieve this incorporation, each newly calculated acoustic signature can be compared with the composite acoustic signature to estimate the delay with respect to the composite acoustic signature. In one such embodiment, the newly calculated acoustic signatures are incorporated one by one into the composite acoustic signature, gradually constructing the composite acoustic signature from each newly calculated acoustic signature. To achieve this incorporation, each newly calculated acoustic signature can be compared with the composite acoustic signature to estimate the delay with respect to the composite acoustic signature. The estimated relative delay is used to incorporate the newly calculated acoustic signature into the composite acoustic signature. The acoustic signature is shifted by the estimated delay before being incorporated into the In such an embodiment, the acoustic signature, such as the maximum negative peak, can be compensated for. The delay can be estimated by finding the location of the distinctive features of the net. In an implementation, the acoustic signature is correlated with a composite acoustic signature and the peak of the correlation is calculated. The delay can be estimated by identifying the delay of the sound signature. This can be called the alignment of the sound signatures. In this case, each shifted acoustic signature can be averaged with the combined signature. do.

[0138] Other combination techniques, such as wavelet transform-based combination, have been proposed with low delay. It creates a composite acoustic signature that is robust against noise variations.

[0139] FIG. 12 identifies components of an air path of a respiratory treatment system in accordance with one aspect of the present technology. 12 is a flow chart illustrating a method 1200 for determining whether a During the passage of the respiratory-gated window as described above, the output cepstrum is calculated from the output signal y(t).

number

number

[0140] Then, in step 1220, the reflection component is calculated from the cepstrum calculated in step 1210. (The acoustic signature) is separated. In the next step 1230, the acoustic signature is incorporated into the composite acoustic signature in a robust manner for a small shift in the cepstrum region as follows. (In the first pass through this loop, step 1230 simply designates the acoustic signature as the composite acoustic signature).

[0141] Thereafter, step 1240 checks whether sufficient acoustic signatures have been incorporated to constitute the composite acoustic signature. If not ("N"), method 11000 proceeds to step 1260, waits for the next respiration-synchronized window, and then returns to step 1210 to calculate a new cepstrum. If so ("Y"), step 1250 identifies the current component by comparing the composite acoustic signature with a default signature dataset or a predefined signature dataset, such as the signature dataset of previously measured acoustic signatures obtained from a system containing known components. Next, method 1200 ends.

[0142] Figure 13 shows two graphs. The upper graph 1300 shows a set of unaligned acoustic signatures when the length of the tube changes between windows. The lower graph 1350 shows the same set of acoustic signatures after alignment according to the above-described maximum negative peak embodiment. It can be confirmed that alignment results in a set of composite acoustic signatures that are more clearly defined than a set of unaligned acoustic signatures.

[0143] The signal processing analysis described in connection with FIG. 12, as previously mentioned, is implemented in firmware, hardware ​​​​​​​​​​​​​​By a controller or processor, such as by using hardware and / or software. Such a controller may distinguish between a mask and a conduit. This identification information or data relating to the identity of the device is then passed to further controllers, processors, can be relayed to a device, system, or computer or used by a controller. This information is then used to determine therapy settings and , and when adjusting other settings aimed at controlling RPT devices.

[0144] For example, the above technology may be part of a controller for a respiratory treatment system such as a CPAP device. Such implementations may be implemented by a CPAP device user or clinician in conjunction with a particular mask. This can help reduce the need to manually enter or adjust settings on devices to use them. Thus, in some embodiments of the present technology, such systems are automatically identified. The device automatically switches on with settings adjusted according to the patient interface or mask configuration. This allows the user to change masks without having to enter any input or settings required for the CPAP device. In some cases, the identification obtained by the automated processes described above may even be used to Prompt the user with additional information so that the user only needs to enter confirmation of their identity This allows you to easily set up the RT device's user interface. By avoiding or reducing the need to scroll through multiple patient interface items This simplifies the setup.

[0145] Additionally, in some embodiments, information regarding the identity of a particular mask is stored at the time of manufacture. It can be selectively sent to doctors and clinicians and used to assist in patient troubleshooting. Such data can be transmitted, for example, by wireless communication protocols such as Bluetooth® and / or Wi-Fi®. In addition, in some embodiments, information regarding the identity of a particular mask can be used to trigger actions such as manually or automatically deploying personalized coaching or training content related to that particular mask, such as a tutorial regarding the adjustment implementation of the mask. Such content can be communicated to the user via the screen of the treatment device, the corresponding mobile device application, or other communication means such as email or SMS messages. Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks).

[0146] In some embodiments, during the identification of components, a blower speed greater than the above speed can be implemented. For example, some conduits have properties that can reduce noise. In addition, in some embodiments, information regarding the identity of a particular mask can be used to trigger actions such as manually or automatically deploying personalized coaching or training content related to that particular mask, such as a tutorial regarding the adjustment implementation of the mask. Such content can be communicated to the user via the screen of the treatment device, the corresponding mobile device application, or other communication means such as email or SMS messages. In addition, in some embodiments, information regarding the identity of a particular mask can be used to trigger actions such as manually or automatically deploying personalized coaching or training content related to that particular mask, such as a tutorial regarding the adjustment implementation of the mask. Such content can be communicated to the user via the screen of the treatment device, the corresponding mobile device application, or other communication means such as email or SMS messages. Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks).

[0147] Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks). Alternatively, in some embodiments of the present technology, the controller can be configured to detect whether the patient is currently wearing the mask based on the nature of the acoustic reflection, such as by comparing the test cepstrum data with the template cepstrum data recorded during the patient's use. Similarly, the present technology can be implemented for the purpose of determining the presence or absence of technical problems with the mask, including leaks and / or twists of the system. This can also be detected by comparing the current test cepstrum data with the cepstrum data recorded when the mask was operating well and correctly worn on the patient's face (e.g., without leaks).

[0148] In some embodiments, during the identification of components, a blower speed greater than the above speed can be implemented. For example, some conduits have properties that can reduce noise. In some embodiments, during the identification of components, a blower speed greater than the above speed can be implemented. For example, some conduits have properties that can reduce noise. The material can be used. In such a system, the acoustic loss of the system can vary. When the loss detected by the measured signal increases (e.g., a decrease in amplitude), the decibel of the sound source or noise source can be increased to overcome the influence of the sound loss. This can be achieved by increasing the speed of the blower during the test measurement process . In addition, other elements included in the air path can increase the acoustic loss. These elements can include a humidifier, a noise baffle, a valve, etc. Again, the loss caused by these components can also be overcome by increasing the level or amplitude of the noise source. Typically, the appropriate volume level of the input signal can be above about 20 dBa. The frequency range of the microphone 4270 can be selected according to the geometric resolution required for component identification. To resolve information about small dimensions, typically high-frequency components in the generated sound signal are required. A typical air circuit for respiratory therapy exhibits tube resonances with a fundamental frequency of less than 100 Hz, but harmonics above 10 kHz, which are integer multiples of the fundamental frequency, appear in the spectrum. The frequency range of the microphone 4270 can be selected to be large enough to sense sufficient resonant harmonics where the period associated with the harmonic spacing exists in the inverse Fourier transform of the logarithmic spectrum. Thus, in one embodiment, the microphone 4270 has a frequency upper limit of at least 10 kHz. As described above, some embodiments can utilize a sound source such as a speaker to generate a sound in

[0149] pulse or white noise. This is a very way that does not generate noise. The typical air circuit for respiratory therapy exhibits tube resonances with a fundamental frequency of less than 100 Hz, but harmonics above 10 kHz, which are integer multiples of the fundamental frequency, appear in the spectrum. The frequency range of the microphone 4270 can be selected to be large enough to sense sufficient resonant harmonics where the period associated with the harmonic spacing exists in the inverse Fourier transform of the logarithmic spectrum. Thus, in one embodiment, the microphone 4270 has a frequency upper limit of at least 10 kHz. As described above, some embodiments can utilize a sound source such as a speaker to generate a sound in pulse or white noise. This is a very way that does not generate noise.

[0150] As described above, some embodiments can utilize a sound source such as a speaker to generate a sound in pulse or white noise. This is a very It may be particularly effective for a respiratory therapy system equipped with a quiet blower. For example, when using a ResMed( registered trademark) RPT device generally at a speed of less than 6 krpm, the blower is very quiet. Under this situation, even using only the sound of the blower as the sound source to create an input signal may be insufficient for identifying some components. This problem can be overcome by including an additional sound source in the air path. This can be activated during the measurement period, such as when the mask is first attached to the conduit. The additional sound source can be a speaker, but other sound emitters can also be used. For example, a simple acoustic generator such as a reed that is selectively activated and deactivated (e.g., mechanically applied and removed with respect to the air path of the system) can be configured to vibrate upon receiving the air flow from the RPT device. This can serve to selectively generate sound impulses. Alternatively, the valve of the operating RPT device can be the additional sound source. In addition, a sound source such as a speaker can be used for the purpose of filling the gaps in the sound spectrum generated by the blower. For example, a speaker can be used to generate a signal designed to have a specific spectrum and add the sound of the blower and the sound of the speaker to generate a white spectrum. This can not only improve the detection accuracy of the system but also improve the perceived quality of the sound experienced by the user of the therapy device.

[0151]

[0152] In some embodiments, the mask can be designed to have unique acoustic response characteristics. For example, a unique acoustic resonator or unique characteristic dimensions can be designed in the mask or conduit so that the acoustic reflection data of each mask can be easily distinguished.

[0153] In some embodiments, instead of cepstrum analysis, autocorrelation (i.e., the inverse Fourier transform of the power spectrum) can be performed.

[0154] In further embodiments of the present technology, for the purpose of identifying specific mask characteristics in addition to type identification, acoustic reflections can be analyzed. For example, system response data can be utilized for the purpose of identifying the characteristics of a mask or conduit. These characteristics include diameter, constituent material, cavity volume, overall configuration of the mask and conduit, and the like.

[0155] 5.9 Glossary For the purposes of disclosing the present technology, in certain forms of the present technology, one or more of the following definitions apply. In other forms of the present technology, other definitions may apply.

[0156] 5.9.1 General Air: In certain forms of the present technology, air means the atmosphere, and in other forms of the present technology, air can mean a combination of other breathable gases (e.g., an oxygen-rich atmosphere).

[0157] Atmosphere: In certain forms of the present technology, the term "atmosphere" should be taken to mean (i) outside of a respiratory therapy system or patient, and (ii) that which directly surrounds a respiratory therapy system or patient.

[0158] For example, the ambient humidity for a humidifier can be the humidity of the air directly surrounding the humidifier (e.g., the humidity inside the room where the patient is sleeping). Such ambient humidity may be different from the humidity outside the room where the patient is sleeping.

[0159] Automatic Positive Airway Pressure (APAP) Therapy: SDB onset Depending on the presence or absence of SDB onset notification, for example, CPAP therapy capable of automatically adjusting the treatment pressure between a minimum limit and a maximum limit during the breathing cycle.

[0160] Continuous Positive Airway Pressure (CPAP) Therapy: Respiratory pressure therapy in which the treatment pressure is substantially constant throughout the patient's breathing cycle. In some forms, the pressure at the airway inlet rises slightly during exhalation and drops slightly during inhalation. In some forms, the pressure varies between different breathing cycles of the patient (e.g., increased in response to detection of signs of partial upper airway obstruction and reduced in the absence of notification of partial upper airway obstruction).

[0161] Flow rate: The instantaneous amount (or mass) of air delivered per unit time. Flow rate can refer to the instantaneous amount. In some cases, when referring to flow rate, it refers to a scalar quantity (i.e., a quantity having only magnitude). In other cases, when referring to flow rate, it refers to a vector quantity (i.e., a quantity having both magnitude and direction). A sign Q can be assigned to the flow rate. The "flow rate" may be abbreviated as "flow" or "airflow" in some cases.

[0162] Leakage: The term "leakage" is taken as an unintended air flow. In one embodiment, leakage can occur due to an incomplete seal between the mask and the patient's face. ​​​​​​​​​​​​In another embodiment, leakage can occur at a swivel elbow relative to the surroundings. It can occur.

[0163] Patient: A person with or without a respiratory disease.

[0164] Pressure: Force per unit area. Pressure can be expressed in various units (e.g., cmH2O, g-f / cm, 2 and hectopascal). 1 cmH2O is equal to 1 g-f / cm 2 and is approximately 0.98 hectopascal. In this specification, unless otherwise specified, pressure is given in units of cmH2O.

[0165] Respiratory Pressure Therapy (RPT): Addition of an air supply to the airway inlet at a treatment pressure that is typically a positive pressure relative to the atmosphere.

[0166] Seal: When used as a noun ("seal"), it can refer to a structure, and when used as a verb (" seal (off)"), it can refer to its effect. Two elements can be constructed and / or arranged such that they "seal" or obtain a "sealing" effect between them without the need for a separate " seal" element itself.

[0167] 5.9.2 Patient Interface Plethysm chamber: The mask plethysm chamber is taken to mean a part of the patient interface having a wall that at least partially encloses a volume, and the air in the volume is pressurized to exceed atmospheric pressure during use. The shell can form part of the wall of the mask plethysm chamber.

[0168] Shell: A shell is a curved, relatively thin structure that has stiffness in bending, tension, and compression. For example, the curved structural wall of the mask may be a shell. In some configurations, the shell may be faceted. The shell may be airtight. In some configurations, the shell may not be airtight.

[0169] Vent: (noun): A device that allows airflow to the surrounding atmosphere inside a mask or conduit. The design allows for clinically effective flushing of exhaled gas. For effective washing, a flow rate of about 10 liters / minute to about 100 liters / minute is recommended. Depending on the mask design and treatment pressure,

[0170] 5.10 Other Notes A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owners reserve the right to make, distribute, and use of the material in any form whatsoever. If any person reproduces this patent document or this patent disclosure by facsimile, the reproduction will not be treated as a part of the patent office's patent file. or those appearing in the records, there is no objection, but for other purposes all copyrights Hold.

[0171] Unless otherwise clearly indicated from the context and unless a range of values ​​is provided, the lower limit 1 / 10 of the range, between the upper and lower limits of the range, and any other stated value or intermediate value in the stated range. It is understood that each intervening value for the input value is included in the present technology. The upper and lower limits of each of these intervening ranges are independently included within the range. Anything specifically exceeding these limits is also encompassed by the present technology. If both are included, the range exceeding either or both of these limitations is also included in the present technology. is done.

[0172] Furthermore, when a value (singular or plural) is embodied as part of the present technology herein, unless otherwise specified, such a value may be approximated and used to any appropriate significant digits to the extent permitted or required by the practical technical implementation. It is understood that such values can be used to any appropriate significant digits up to the extent permitted or required by the practical technical implementation.

[0173] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this technology belongs. Any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present technology, but only a limited number of exemplary methods and materials are described herein. Although specific materials are described as being preferably used for the construction of components, obvious alternative materials with similar properties can be used as substitutes. Furthermore, unless stated to the contrary, any and all components described herein are understood to be manufacturable and can be manufactured either collectively or individually. It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an", and "the" include their plural equivalents unless the context clearly indicates otherwise. In this specification, the term "about" is used to represent an amount that varies by about 30%, preferably about 20%, more preferably about 10% with respect to a reference amount. Using the word "about" to modify a number makes it clear that the number should not be interpreted as an exact value.

[0174] Although specific materials are described as being preferably used for the construction of components, obvious alternative materials with similar properties can be used as substitutes. Furthermore, unless stated to the contrary, any and all components described herein are understood to be manufacturable and can be manufactured either collectively or individually. It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an", and "the" include their plural equivalents unless the context clearly indicates otherwise. In this specification, the term "about" is used to represent an amount that varies by about 30%, preferably about 20%, more preferably about 10% with respect to a reference amount. Using the word "about" to modify a number makes it clear that the number should not be interpreted as an exact value.

[0175] It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an", and "the" include their plural equivalents unless the context clearly indicates otherwise. Furthermore, unless stated to the contrary, any and all components described herein are understood to be manufacturable and can be manufactured either collectively or individually. It should be noted that, as used in this specification and the appended claims, the singular forms "a", "an", and "the" include their plural equivalents unless the context clearly indicates otherwise.

[0176] In this specification, the term "about" is used to represent an amount that varies by about 30%, preferably about 20%, more preferably about 10% with respect to a reference amount. Using the word "about" to modify a number makes it clear that the number should not be interpreted as an exact value. Furthermore, unless stated to the contrary, any and all components described herein are understood to be manufacturable and can be manufactured either collectively or individually. Using the word "about" to modify a number makes it clear that the number should not be interpreted as an exact value. merely shows.

[0177] All the published documents described in this specification are hereby incorporated by reference for the disclosure and description of the methods and / or materials to which they are directed, and form part of this specification. The published documents discussed in this specification are provided only for their disclosure prior to the filing date of this application. Nothing in this specification should be construed as an admission that the technology described herein precedes such published documents in the prior art. Further, the dates of the published documents described may differ from the actual dates of the published documents, and individual verification may be required.

[0178] The terms "comprises" and "comprising" should be construed as referring to elements, components or steps in a non-exclusive sense, indicating that the described elements, components or steps may be present, utilized or combined with other elements, components or steps not expressly recited. Therefore, unless otherwise required by context, throughout this specification, the word "comprising" implies the inclusion of the recited steps or elements, or groups of steps or elements, but does not imply the exclusion of other steps or elements, or groups of steps or elements. As used in this specification, the term "including" is also an open term meaning including at least the element / feature that follows the term, but not excluding others. Thus, "including" is synonymous and equivalent to "comprising".

[0179] The various methods or processes outlined in this specification may be implemented on various operating systems or platforms Software executable on one or more processors using any of the rat platforms and can be encoded. Additionally, such software can be described using any of several suitable programming languages and / or programming tools or scripting tools, and in addition to being compilable as executable machine language code or intermediate code executed on a framework or virtual machine.

[0180] In this regard, various inventive concepts, when executed on one or more computers or other processors, perform a method of implementing various embodiments of the above-described technology, one or more programs encoded with processor-readable media or computer-readable storage media (or a plurality of such storage media) such as, for example, computer memory, one or more floppy disks, compact disks, optical disks, magnetic tapes, flash memories, circuit configurations within a field-programmable gate array or other semiconductor device, or other non-transitory media or tangible computer storage media). Such computer-readable media (singular and plural) can be portable, and the programs or programs stored thereon can be loaded onto one or more different computers or other processors to implement

[0181] the various aspects of the present technology described above. As used herein, the terms "program" or "software" are used in their general sense and can be any type of computer code adopted for the purpose of programming a refers to any set of computer executable instructions. In addition, according to certain aspects, One or more computer programs that perform the methods of the present technology when It is not necessary for the hardware or processor to reside on the same computer or processor, and multiple hardware components may be used to implement various aspects of the present technology. It is understood that the software may be distributed in a modular manner across different computers or processors. For example, some versions of the technology described herein may be A server having access to either a computer-readable or processor-readable medium The server may include a communication network, the Internet, or A processor control instruction or a processor executable instruction of a medium is transmitted via a network such as , request to download to electronic devices such as smart mobile phones and smart speakers The electronic device may be configured to receive the medium so that it can execute the instructions on the medium. The present technology may include such a medium for performing the operations described herein. The method may be implemented as a method for accessing any of the media stored in the storage device. to download the processor-executable instructions to the electronic device over a network. and a link to transmit instructions for the medium to the electronic device in response to the request. Optionally, the server may include receiving the quest at a server. The medium can be accessed to execute instructions.

[0182] Computer-executable instructions may be stored in one or more computer programs, such as program modules. In general, the program modules may be implemented in many different ways. A routine is one that performs a specific task or implements a specific abstract data type. It may include programs, objects, components, data structures, etc. Typically, a The functions of program modules can be combined or separated as needed in various embodiments. Scattered.

[0183] Also, the data structure can be stored in a computer-readable medium in any suitable format. For the sake of illustration For simplicity, the data structure can be shown as having fields that have relationships through their positions within the data structure. Such relationships can be Similarly realized by assigning positions within the computer-readable medium that convey the relationships between those fields to the storage devices of each field. However, in order to establish Relationships between the information within the fields of the data structure, any suitable mechanism can be used, such as pointers or tags that establish relationships between data elements.

[0184] Although the techniques in this specification have been described with reference to specific examples, it should be understood that these examples Merely illustrate the principles and applications of the technology. For example, In this specification, acoustic generators and acoustic monitoring techniques are described in specific examples related to the use of RPT device(s) And component(s), but such acoustic generation And acoustic monitoring techniques can be similarly implemented in component(s) of any respiratory therapy (RT ) device, such as a high flow therapy (HFT) device that provides a controlled flow of air at a therapeutic flow rate through a patient interface. Therefore, The HFT device is similar to a pressure-controlled RPT device, but has components for flow control. ​ It is configured to have a roller. In such an embodiment, the acoustic generator can be configured to measure gas characteristics associated with high-flow therapy generated by the HFT device and can be integrated to sample the gas flow of the patient circuit, its conduit coupler, and / or the patient interface of the HFT device. Therefore, the HFT device can also optionally include an acoustic receiver in addition to the processing techniques for acoustic analysis described herein to receive the acoustic / sound signal generated by the HFT device in which the acoustic generator is installed

[0185] In some cases herein, terms and symbols may indicate certain details unnecessary for the implementation of the technology. For example, terms such as "first" and "second" (etc.) are used, but unless otherwise specified, these terms are not intended to indicate any order and are used to distinguish separate elements. Further, the description or illustration of process steps in the method may be presented in an ordered manner, but such an order is not necessary. One skilled in the art will recognize that such an order can be changed and / or it is possible to perform the aspects simultaneously or even more synchronously

[0186] Thus, it should be understood that numerous modifications are possible in the exemplary embodiments and other arrangements can be devised without departing from the spirit and scope of the technology

Description of Reference Numerals

[0187]

Table 1A

Table 1B

Table 1C

Table 1D

Table 1E

Claims

1. to generate pressurized air that is delivered from the outlet along the air circuit to the patient interface. a pressure generator configured as a sensor configured to generate an audio signal representative of the sound of the pressure generator in the air circuit; and, damping configured to reduce sound reflections from the pressure generator along the air circuit; A structure, Processing the acoustic signal to identify the patient interface and / or the air circuit. with a controller configured to 16. A device for producing respiratory therapy comprising:

2. The damping structure provides an acoustic impedance between the air circuit and the cavity of the housing of the pressure generator. The impedance of the pass-through attenuation conduit is changed by the pass-through attenuation conduit. The device of claim 1.

3. The attenuation structure defines a cross section of a passage through the pass-through attenuation conduit, the cross section being The shape of the inner surface of the through attenuation conduit defines an expansion along the path of the passage; The device of claim 2.

4. The cross-section gradually widens away from the patient interface end of the air circuit. The device of claim 3 .

5. The device comprises a waveguide formed by at least the outlet and the air circuit. and the attenuation structure is disposed along the waveguide between the sensor and the outlet, the sensor is disposed along the waveguide between the attenuation structure and the air circuit; The device according to any one of claims 1 to 4.

6. The device according to any one of claims 1 to 5, wherein the damping structure is formed by a horn. Vice.

7. The device of claim 6 , wherein the horn has a conical shape.

8. A processor associated with the respiratory treatment device, coupled to the respiratory treatment device 1. A method for identifying a component of an air path, comprising: A cepstrum is obtained by flattening the spectrum of a sound signal representative of the sound in the air path. processing the sound signal, Separating an acoustic signature from the cepstrum; The acoustic signature is divided into a set of predetermined acoustic signatures corresponding to each component. Compared to Cha, identifying the component based on a comparison of the acoustic signature to the set. and The method includes:

9. The flattening step comprises:

9. The method of claim 8, further comprising removing the log spectrum of the filtered version of the sound signal. 。

10. The method of claim 9 , wherein the removing comprises subtracting.

11. performing said processing and separating at least once to generate a plurality of acoustic signatures; Repeat and combining the plurality of acoustic signatures into a composite acoustic signature; and said comparing further comprises: The method according to any one of claims 8 to 10, which comprises comparing with a signature.

12. The combining step may further comprise converting one or more of the plurality of acoustic signatures into a composite acoustic signature. The method of claim 11 , further comprising matching a signature.

13. 4. The method of claim 3, wherein the combining comprises averaging the multiple acoustic signatures.

13. The method according to claim 11 or 12.

14. the component is a patient interface, and the repeating Any of claims 11 to 13, wherein the device is synchronized with the respiratory cycle of a patient wearing the interface.

13. The method according to claim 1.

15. The combining may be performed with respect to small variations in delay between the plurality of acoustic signatures. The method according to any one of claims 11 to 14, wherein the method is robust.

16. and activating a pressure generator of the respiratory treatment device based on said identifying. The method according to any one of claims 8 to 15, further comprising adjusting a control parameter. Law.

17. to generate pressurized air that is delivered from the outlet along the air circuit to the patient interface. a pressure generator configured as a sensor configured to generate an audio signal representative of the sound of the pressure generator in the air circuit; and, A process including flattening the spectrum of the sound signal is carried out to obtain a cepstrum. Then, the acoustic signature is separated from the cepstrum and the acoustic signature is divided into the respective components. a set of predetermined acoustic signatures corresponding to the components of the The patient interface and / or the air circuit may be identified based on a comparison to a set. With a controller configured as 16. A device for producing respiratory therapy comprising:

18. damping configured to reduce sound reflections from the pressure generator along the air circuit; The device of claim 17 further comprising a structure.

19. The damping structure provides an acoustic impedance between the air circuit and the cavity of the housing of the pressure generator. The impedance of the pass-through attenuation conduit is changed by the pass-through attenuation conduit. The device of claim 18.

20. 20. A device as claimed in claim 18 or 19, wherein the damping structure is formed by a horn.

21. The device of claim 20 , wherein the horn has a conical shape.

22. The controller determines a patient interface and / or air circuit based on the identified patient interface and / or air circuit. and further configured to adjust a control parameter for operating the pressure generator. The device according to any one of claims 17 to 21.

23. A processor associated with the respiratory treatment device, coupled to the respiratory treatment device.

1. A method for identifying a component of an air path comprising: processing a sound signal representative of the sound in the air path to obtain a cepstrum; Separating an acoustic signature from the cepstrum; repeating said processing and separation at least one time to generate a plurality of acoustic signatures. And, combining the plurality of acoustic signatures into a composite acoustic signature; The composite acoustic signature is divided into a set of predetermined acoustic signatures corresponding to each of the components. Compared to Necha, identifying the component based on a comparison of the acoustic signature to the set. and The method includes:

24. The combining step may further comprise converting one or more of the plurality of acoustic signatures into a composite acoustic signature.

24. The method of claim 23, comprising matching a signature.

25. 23. The method of claim 22, wherein the combining comprises averaging the multiple acoustic signatures.

24. The method according to claim 24.

26. the component is a patient interface, and the repeating Any of claims 23 to 25, wherein the interface is synchronized with the respiratory cycle of a patient wearing the interface. The method according to any one of claims 1 to 5.

27. The combining is robust to delay variations among the multiple acoustic signatures. The method according to any one of claims 23 to 26, wherein

28. The processing step includes flattening the spectrum of the sound signal.

27. The method according to any one of claims 26 to 26.

29. The flattening step comprises: flattening the logarithmic spectrum of the sound signal by applying a low-pass filtering 30. The method of claim 28, comprising subtracting the filtered log-spectra.

30. and activating a pressure generator of the respiratory treatment device based on said identifying. The method according to any one of claims 23 to 29, further comprising adjusting a control parameter. method.

31. When executed by a processor of a controller of a respiratory treatment device, and a computer program that causes the processor to execute the method according to any one of claims 23 to 30. A computer-readable medium having computer-readable instructions encoded thereon.

32. to generate pressurized air that is delivered from the outlet along the air circuit to the patient interface. a pressure generator configured as a sensor configured to generate an audio signal representative of the sound of the pressure generator in the air circuit; and, Processing the sound signal to obtain a cepstrum and extracting an acoustic signature from the cepstrum. and processing and separating the signals to generate a plurality of acoustic signatures. and combining the plurality of acoustic signatures into a composite acoustic signature. The signal is compared to a set of predetermined acoustic signatures corresponding to each component. and / or the patient interface based on a comparison of the acoustic signature to the set. a controller configured to identify the air circuit; A device for producing respiratory therapy comprising:

33. damping configured to reduce sound reflections from the pressure generator along the air circuit; 33. The device of claim 32, further comprising a structure.

34. The damping structure provides an acoustic impedance between the air circuit and the cavity of the housing of the pressure generator. The impedance of the pass-through attenuation conduit is changed by the pass-through attenuation conduit. The device of claim 33.

35. 35. A device as claimed in claim 33 or 34, wherein the damping structure is formed by a horn.

36. The device of claim 35 , wherein the horn has a conical shape.

37. To combine the plurality of acoustic signatures, the controller and adapted to match one or more of the acoustic signatures with the composite acoustic signature. The device according to any one of claims 32 to 36,

38. To combine the plurality of acoustic signatures, the controller 38. A device according to claim 36 or 37, configured to average the sound signatures. 。

39. The controller determines whether the patient interface and / or air circuit is in a predetermined state based on the identified patient interface and / or air circuit. and further configured to adjust a control parameter for operating the pressure generator. The device according to any one of claims 32 to 38,

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