CN102266616B - Method and device for monitoring blockage of breathing equipment - Google Patents
Method and device for monitoring blockage of breathing equipment Download PDFInfo
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- CN102266616B CN102266616B CN201010620835.9A CN201010620835A CN102266616B CN 102266616 B CN102266616 B CN 102266616B CN 201010620835 A CN201010620835 A CN 201010620835A CN 102266616 B CN102266616 B CN 102266616B
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- breathing
- breathing apparatus
- pressure
- flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
- A61M16/0875—Connecting tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/70—General characteristics of the apparatus with testing or calibration facilities
Abstract
The invention provides a method and a device for monitoring blockage of breathing equipment. The method for monitoring the blockage of the breathing equipment comprises the following steps of: a, detecting pressure and flow of a suction end and a breathing end of the breathing equipment; and b, performing calculation according to the pressure and the flow, and determining the blockage position of the breathing equipment according to the calculation result. The device for monitoring the blockage of the breathing equipment comprises a checking module, a detection module and a calculation module, wherein the checking module is used for checking that the errors of the pressure and the flow are in preset ranges before normal ventilation; the detection module is used for detecting the pressure and the flow of the suction end and the breathing end of the breathing equipment; and the calculation module is used for performing calculation according to the pressure and the flow and determining the blockage position of the breathing equipment according to the calculation result. The invention has the advantages that: the really feasible method and the really feasible device for judging the blockage of the breathing equipment are provided for judging the blockage at a breathing duct, a user side air passage and an exhaust end in the shortest possible time.
Description
Technical field
The invention belongs to field of medical device, relate to a kind of monitoring method and device of blockage of breathing equipment.
Background technology
Respirator has become Routine Medical Device, be widely used in each clinical first aid and intensive care unit(ICU), but because respirator belongs to crash equipment, the specific factor that has himself, often in clinical, easily go wrong, therefore, for respirator, in the maintenance on daily, seem especially important, in the situation that there is no corresponding checkout equipment, respirator need to be given full play to self measuring ability, pinpoint the problems in time, effectively deal with problems, to guarantee that respirator is when in use in optimum Working.High-end breathing apparatus in the market, some types have had to stop up reports to the police, yet for the monitoring method of the particular location stopping up, but without any data or patent, mention, like this, when the enterprise of production breathing apparatus need to offer obstruction warning function, just there is no technology and test basis.
In prior art, for respirator, in short as far as possible reality, accurately judge the problem of blocking position, still there is no effective solution.
Summary of the invention
The object of the invention is to propose a kind of monitoring method and device of blockage of breathing equipment, for solving prior art, can not within the short as far as possible time, accurately judge the problem of the blocking position of respirator.
One of to achieve these goals, the present invention by the following technical solutions: a kind of monitoring method of blockage of breathing equipment, comprising: a: the pressure and the flow that detect the suction end of described breathing apparatus and the end of exhaling; And b: calculate according to described pressure and flow, and confirm the blocking position of described breathing apparatus according to result of calculation.
Further, described step a comprises: the pressure and the flow that detect respectively the suction end of described breathing apparatus and the end of exhaling.
Further, before described step a, the monitoring method of described blockage of breathing equipment also comprises: before normal ventilation described in verification the error of pressure and flow in preset range.
Further, described preset range comprises: described pressure and flow be less than or equal to definite value can collected data in the time.
Further, described step b comprises: the corrugated hose block information that obtains described breathing apparatus; Obtain the exhaust port of described breathing apparatus and the block information of external device; And the block information that obtains the user side air flue of described breathing apparatus.
Further, described corrugated hose block information is by judging whether the pressure difference value of described the breathing apparatus suction end in the time and the end of exhaling in definite value exceeds preset range and draw; If so, confirm that stopping up appears in described corrugated hose.
Further, the expiration of the block information of described exhaust port and external device by judge described breathing apparatus not malleation PEEP whether over preset value; And whether the expiration tidal volume of described breathing apparatus and air-breathing tidal volume exceed preset range in definite value and draw in the time; If so, confirm that stopping up appears in described exhaust port and external device.
Further, described air-breathing tidal volume draws by calculating the inspiratory flow of expiratory phase and the difference of expiratory gas flow; Described expiration tidal volume draws by calculating the expiratory gas flow of expiration phase and the difference of inspiratory flow.
Further, the block information of described user side air flue, by judging whether the minute ventilation of described breathing apparatus obtains lower than preset value, if so, confirms that stopping up appears in described user side air flue.
Further, described minute ventilation by default definite value in the time minimum air-breathing tidal volume calculate and draw.
Another object of the present invention is to provide a kind of monitoring device of blockage of breathing equipment, and the monitoring device of described blockage of breathing equipment comprises: correction verification module, for the error of pressure described in verification before normal ventilation and flow in preset range; Detection module, for detection of the suction end of described breathing apparatus and pressure and the flow of the end of exhaling; And computing module, for calculating according to described pressure and flow, and according to result of calculation, confirm the blocking position of described breathing apparatus.
Further, described computing module comprises: acquisition module, for obtaining the corrugated hose block information of described breathing apparatus; Obtain the exhaust port of described breathing apparatus and the block information of external device; And the block information that obtains the user side air flue of described breathing apparatus; And judge module, for judging whether the suction end in the time exceeds preset range with the pressure difference value of the end of exhaling to described breathing apparatus in definite value; Whether the expiration that judges described breathing apparatus not malleation PEEP surpasses preset value; And whether the expiration tidal volume of described breathing apparatus and air-breathing tidal volume exceed preset range in definite value in the time; And whether the minute ventilation that judges described breathing apparatus is lower than preset value.
Further, described judge module comprises: confirm module, for confirming the blocking position of described breathing apparatus.
Compared with prior art, the invention has the beneficial effects as follows: a kind of truly feasible blockage of breathing equipment determination methods and device are provided, can within the short as far as possible time, have judged the obstruction that occurs in corrugated hose, user side air flue, exhaust end.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to type of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the main flow chart according to the monitoring method of a kind of blockage of breathing equipment described in the embodiment of the present invention;
Fig. 2 is the application implementation figure on described breathing apparatus according to the monitoring method of a kind of blockage of breathing equipment described in the embodiment of the present invention;
Fig. 3 is according to the structural representation of the monitoring device of a kind of blockage of breathing equipment described in the embodiment of the present invention.
In figure, breathing apparatus main frame-201, display-203, suction port-205, inspiratory pressure sensor-207, inspiratory flow sensor-209, aspirating air pipe-211, user side air flue-213, analog subscriber end-215, expiration port-217, exhaust end-219, breath pressure sensor-223, expiratory flow sensor-221, expiration pipeline-225.
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The present invention is directed to blockage of breathing equipment position probing problem, propose a kind of monitoring method and device of blockage of breathing equipment, the concrete control monitoring method of described blockage of breathing equipment and the embodiment of device of introducing:
Fig. 1 is the main flow chart according to the monitoring method of a kind of blockage of breathing equipment described in the embodiment of the present invention; Shown in Figure 1, a kind of monitoring method of blockage of breathing equipment, comprising:
A: the pressure and the flow that detect the suction end of described breathing apparatus and the end of exhaling; And
B: calculate according to described pressure and flow, and confirm the blocking position of described breathing apparatus according to result of calculation.
The monitoring method of above-mentioned blockage of breathing equipment is specifically applied on breathing apparatus, as shown in Figure 2, display 203 is set on breathing apparatus main frame 201, inspiratory pressure sensor 207 and inspiratory flow sensor 209 are installed on the suction port 205 of described breathing apparatus, and airflow direction enters analog subscriber end 215 along aspirating air pipe 211 through the Y-type three way type of user side air flue 213; An other side at described breathing apparatus main frame 201, on the exhaust end 219 of the expiration port 217 of described breathing apparatus, breath pressure sensor 223 and expiratory flow sensor 221 are set, described airflow direction enters analog subscriber end 215 along expiration pipeline 225 through the Y-type three way type of user side air flue 213.
Before normal ventilation, to guarantee that, under same pressure and flow conditions, the data that described inspiratory pressure sensor 207, inspiratory flow sensor 209 and breath pressure sensor 223 and expiratory flow sensor 221 record are all within the scope of error precision by verification.Described breathing apparatus must be when user breathes in real time (<=10ms) collect pressure and data on flows.By the image data of two cover sensors is carried out to computational analysis, can monitor the obstruction of breathing apparatus.By the data to the sensor, calculate air-breathing tidal volume and expiration tidal volume and the minute ventilation that can obtain user, wherein, described air-breathing tidal volume is calculated as the difference that expiratory phase inspiratory flow sensor 209 and described expiratory flow sensor 221 record flow.Described expiration tidal volume be calculated as the difference that expiratory flow sensor 221 and described inspiratory flow sensor 209 described in expiration phase record flow.Being calculated as over of described minute ventilation breathed for 8 times or the accumulated value of the described air-breathing tidal volume that the frequency of respiration of 1 minute gets the small value is converted to the ventilation of 1 minute.
The calculating that the data that gather by the sensor are carried out, the technical program can be monitored the obstruction of three aspects, comprising: the obstruction of the obstruction of the obstruction of corrugated hose, exhaust port and external device thereof, user side air flue.
When described corrugated hose occurs to stop up, when eupnea, the pressure at blocking pipe two ends will be variant, and the pressure at blocking pipe two ends can be measured with inspiratory pressure sensor 207 and breath pressure sensor 223 respectively, at this moment with the pressure difference value of two pressure transducers, compare, within a period of time, surpass continuously a certain amount of can think there is line clogging.
When described exhaust port and external device generation obstruction thereof, in expiratory phase because outlet valve is while cutting out, so can not judge whether to stop up, and in expiration phase, the end of exhaling needs aerofluxus, breath pressure need to drop to sets PEEP value, if at this moment exhaust end stops up, breath pressure can not decline, and because user's gas is not discharged, the tidal volume of exhaling also can be less than the tolerance of suction, so it is a certain amount of over setting value to work as end expiratory positive pressure, and when expiration tidal volume is less than air-breathing tidal volume certain value, can think and occur that exhaust end and external device thereof stop up.
When user side air flue occurs to stop up, if hold control pattern, air-breathing tidal volume can be less than setting value, and for voltage-controlled pattern, air-breathing tidal volume can be smaller, so can carry out the judgement of user side airway obstruction by low this feature of tidal volume.The behaviors such as the holding one's breath of user, air-breathing antagonism, cough also can cause the air-breathing tidal volume of single to occur above-mentioned phenomenon, in order to prevent false alarm, need to judge by the tidal volume of repeatedly breathing, when repeatedly breathing tidal volume lower than certain value, think that user side air flue stops up, the actual minute ventilation that uses judges.
Preferably, when judgement aspirating air pipe and expiration line clogging, if pressure differential surpasses 5cmH
2o can think line clogging.The time of judging obstruction from stopping up to is no more than 200ms; When judgement exhaust end stops up, when actual end expiratory positive pressure is set the high 10cmH of end expiratory positive pressure than user
2o, and expiration tidal volume be less than air-breathing tidal volume 50% time think that exhaust end stops up.When each air-breathing beginning, judge, the judgement time is no more than the respiration time; When judgement user side airway obstruction, when the air-breathing tidal volume (can not be to exhale, because exhale low may causing because leak) of breathing for continuous three times is lower than setting 80% of tidal volume, think user side airway obstruction.The judgement time is three times of breathing.By the reasons of continuous three times, be to prevent that the air-breathing antagonism of user or other reason from causing false alarm.
Fig. 3 is the apparatus structure schematic diagram of realizing the monitoring method of above-mentioned a kind of blockage of breathing equipment, the monitoring device of described blockage of breathing equipment, as shown in Figure 3, a kind of monitoring device of blockage of breathing equipment comprises: correction verification module 301, for the error of pressure described in verification before normal ventilation and flow in preset range; Detection module 303, for detection of the suction end of described breathing apparatus and pressure and the flow of the end of exhaling; And computing module 305, for calculating according to described pressure and flow, and according to result of calculation, confirm the blocking position of described breathing apparatus.Described computing module 305 comprises: acquisition module 3051, for obtaining the corrugated hose block information of described breathing apparatus; Obtain the exhaust port of described breathing apparatus and the block information of external device; And the block information that obtains the user side air flue of described breathing apparatus; And judge module 3052, for judging whether the suction end in the time exceeds preset range with the pressure difference value of the end of exhaling to described breathing apparatus in definite value; Whether the expiration that judges described breathing apparatus not malleation PEEP surpasses preset value; And whether the expiration tidal volume of described breathing apparatus and air-breathing tidal volume exceed preset range in definite value in the time; And whether the minute ventilation that judges described breathing apparatus is lower than preset value.Described judge module 3052 comprises: confirm module (not shown), for confirming the blocking position of described breathing apparatus.
Therefore, blockage of breathing equipment determination methods and device that the technical program provides can be found out, the obstruction that occurs in corrugated hose, user side air flue, exhaust end can be within the short as far as possible time, judged.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a monitoring method for blockage of breathing equipment, is characterized in that, comprising:
A: the pressure and the flow that detect the suction end of described breathing apparatus and the end of exhaling; And
B: according to described pressure and flow, calculate, and according to result of calculation, confirm the blocking position of described breathing apparatus,
According to described pressure and flow, calculate, and confirm that according to result of calculation the blocking position of described breathing apparatus comprises:
Obtain the corrugated hose block information of described breathing apparatus;
Obtain the exhaust port of described breathing apparatus and the block information of external device; And
Obtain the block information of the user side air flue of described breathing apparatus,
Wherein, described corrugated hose block information is by judging whether the pressure difference value of described the breathing apparatus suction end in the time and the end of exhaling in definite value exceeds preset range and draw; If so, confirm that stopping up appears in described corrugated hose.
2. the monitoring method of blockage of breathing equipment according to claim 1, is characterized in that,
The pressure and the flow that detect the suction end of described breathing apparatus and the end of exhaling comprise: the pressure and the flow that detect respectively the suction end of described breathing apparatus and the end of exhaling.
3. the monitoring method of blockage of breathing equipment according to claim 2, is characterized in that, before detecting the pressure and flow of the suction end of described breathing apparatus and the end of exhaling, also comprises:
Before normal ventilation described in verification the error of pressure and flow in preset range.
4. the monitoring method of blockage of breathing equipment according to claim 3, is characterized in that,
Described preset range comprises: described pressure and flow be less than or equal to definite value can collected data in the time.
5. the monitoring method of blockage of breathing equipment according to claim 1, is characterized in that,
The block information of described exhaust port and external device is by judging whether the end expiratory positive pressure PEEP of described breathing apparatus surpasses preset value; And whether the expiration tidal volume of described breathing apparatus and air-breathing tidal volume exceed preset range in definite value and draw in the time;
If so, confirm that stopping up appears in described exhaust port and external device.
6. the monitoring method of blockage of breathing equipment according to claim 5, is characterized in that,
Described air-breathing tidal volume draws by calculating the inspiratory flow of expiratory phase and the difference of expiratory gas flow;
Described expiration tidal volume draws by calculating the expiratory gas flow of expiration phase and the difference of inspiratory flow.
7. the monitoring method of blockage of breathing equipment according to claim 1, is characterized in that,
The block information of described user side air flue, by judging whether the minute ventilation of described breathing apparatus obtains lower than preset value, if so, confirms that stopping up appears in described user side air flue.
8. the monitoring method of blockage of breathing equipment according to claim 7, is characterized in that, described minute ventilation by default definite value in the time minimum air-breathing tidal volume calculate and draw.
9. a monitoring equipment for blockage of breathing equipment, is characterized in that, comprising:
Correction verification module, for the error of verification pressure and flow before normal ventilation in preset range;
Detection module, for detection of the suction end of described breathing apparatus and pressure and the flow of the end of exhaling; And
Computing module, for calculating according to described pressure and flow, and confirms the blocking position of described breathing apparatus according to result of calculation,
Described computing module comprises:
Acquisition module, for obtaining the corrugated hose block information of described breathing apparatus; Obtain the exhaust port of described breathing apparatus and the block information of external device; And the block information that obtains the user side air flue of described breathing apparatus; And
Judge module, for judging whether the suction end in the time exceeds preset range with the pressure difference value of the end of exhaling to described breathing apparatus in definite value; Whether the end expiratory positive pressure PEEP that judges described breathing apparatus surpasses preset value; And whether the expiration tidal volume of described breathing apparatus and air-breathing tidal volume exceed preset range in definite value in the time; And whether the minute ventilation that judges described breathing apparatus is lower than preset value.
10. monitoring equipment according to claim 9, is characterized in that, described judge module comprises: confirm module, for confirming the blocking position of described breathing apparatus.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010620835.9A CN102266616B (en) | 2010-12-31 | 2010-12-31 | Method and device for monitoring blockage of breathing equipment |
| BR112012032963A BR112012032963A2 (en) | 2010-12-31 | 2011-12-26 | method and apparatus for detecting ventilator block |
| PCT/CN2011/084700 WO2012089093A1 (en) | 2010-12-31 | 2011-12-26 | Method and device for detecting blockage of breathing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010620835.9A CN102266616B (en) | 2010-12-31 | 2010-12-31 | Method and device for monitoring blockage of breathing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102266616A CN102266616A (en) | 2011-12-07 |
| CN102266616B true CN102266616B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010620835.9A Active CN102266616B (en) | 2010-12-31 | 2010-12-31 | Method and device for monitoring blockage of breathing equipment |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102266616B (en) |
| BR (1) | BR112012032963A2 (en) |
| WO (1) | WO2012089093A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266616B (en) * | 2010-12-31 | 2014-02-26 | 北京谊安医疗系统股份有限公司 | Method and device for monitoring blockage of breathing equipment |
| CN104406805B (en) * | 2014-11-19 | 2017-01-25 | 珠海格力电器股份有限公司 | Method and system for detecting unobstructed condition of air conditioner system |
| CN104568410A (en) * | 2015-01-05 | 2015-04-29 | 河北钢铁股份有限公司邯郸分公司 | Continuous-casting secondary cooling nozzle working state online judgment method |
| CN105083501B (en) * | 2015-09-09 | 2018-01-30 | 中国人民解放军海军医学研究所 | Aqualung |
| EP3515540B1 (en) * | 2016-09-19 | 2023-03-08 | Koninklijke Philips N.V. | Systems for patient airway and leak flow estimation for non-invasive ventilation |
| CN106620979B (en) * | 2016-12-29 | 2019-09-17 | 天津怡和嘉业医疗科技有限公司 | A kind of ventilator control method and device |
| CN107179188A (en) * | 2017-07-11 | 2017-09-19 | 张家港孚冈汽车部件有限公司 | Water-spraying pen detecting tool |
| CN108113678A (en) * | 2017-12-04 | 2018-06-05 | 广州和普乐健康科技有限公司 | A kind of respiratory air flow detection method |
| CN109939311A (en) * | 2017-12-20 | 2019-06-28 | 北京谊安医疗系统股份有限公司 | The judgment method and ventilator of breathing circuit obstruction block warning device |
| WO2020133460A1 (en) * | 2018-12-29 | 2020-07-02 | 青岛精安医疗科技有限责任公司 | Oxygen production system and method |
| DE102020124585A1 (en) * | 2020-09-22 | 2022-03-24 | Drägerwerk AG & Co. KGaA | Evaluation unit for detecting a disconnection on the ventilator |
| CN113008485B (en) * | 2021-02-23 | 2023-06-13 | 哈尔滨工业大学 | Four-layer structure superplastic forming/diffusion connection real-time monitoring system and monitoring method thereof |
| CN113413529A (en) * | 2021-06-20 | 2021-09-21 | 三河科达实业有限公司 | Portable universal mechanical ventilation module for life support system adapted to field environment |
| CN115824528B (en) * | 2022-12-07 | 2023-09-29 | 斯莱达医疗用品（惠州）有限公司 | Blocking detection method of respiratory therapeutic apparatus and pipeline of respiratory therapeutic apparatus |
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| US5245995A (en) * | 1987-06-26 | 1993-09-21 | Rescare Limited | Device and method for monitoring breathing during sleep, control of CPAP treatment, and preventing of apnea |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8322339B2 (en) * | 2006-09-01 | 2012-12-04 | Nellcor Puritan Bennett Llc | Method and system of detecting faults in a breathing assistance device |
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| CN102266616B (en) * | 2010-12-31 | 2014-02-26 | 北京谊安医疗系统股份有限公司 | Method and device for monitoring blockage of breathing equipment |
-
2010
- 2010-12-31 CN CN201010620835.9A patent/CN102266616B/en active Active
-
2011
- 2011-12-26 BR BR112012032963A patent/BR112012032963A2/en not_active Application Discontinuation
- 2011-12-26 WO PCT/CN2011/084700 patent/WO2012089093A1/en active Application Filing
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| US5245995A (en) * | 1987-06-26 | 1993-09-21 | Rescare Limited | Device and method for monitoring breathing during sleep, control of CPAP treatment, and preventing of apnea |
| US5803066A (en) * | 1992-05-07 | 1998-09-08 | New York University | Method and apparatus for optimizing the continuous positive airway pressure for treating obstructive sleep apnea |
| US5704345A (en) * | 1993-11-05 | 1998-01-06 | Resmed Limited | Detection of apnea and obstruction of the airway in the respiratory system |
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| CN101873875A (en) * | 2007-09-26 | 2010-10-27 | 呼吸科技公司 | Methods and devices for providing inspiratory and expiratory flow relief during ventilation therapy |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012089093A1 (en) | 2012-07-05 |
| CN102266616A (en) | 2011-12-07 |
| BR112012032963A2 (en) | 2016-11-22 |
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