CN103977492A - Method for estimating capacity control ventilation air leakage based on pressure waveform - Google Patents
Method for estimating capacity control ventilation air leakage based on pressure waveform Download PDFInfo
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- CN103977492A CN103977492A CN201410232734.2A CN201410232734A CN103977492A CN 103977492 A CN103977492 A CN 103977492A CN 201410232734 A CN201410232734 A CN 201410232734A CN 103977492 A CN103977492 A CN 103977492A
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Abstract
The invention belongs to a method for estimating capacity control ventilation air leakage of a respirator and specifically relates to a method for estimating the capacity control ventilation air leakage based on a pressure waveform and a peak value thereof. The method comprises the steps of acquiring an air channel pressure signal at the air supply end of the respirator in a noninvasive capacity control ventilation mode, thereby obtaining a ventilation pressure waveform and a pressure peak value, comparing an acquired pressure waveform curve with a pressure waveform standard curve so as to determine an air leakage grade, and then estimating the air leakage in a respiration period by use of the extracted pressure peak value based on a pressure peak value-air leakage relation.
Description
Technical field
The invention belongs to the evaluation method of a kind of respirator volume control ventilation air leakage, be specifically related to a kind of method of carrying out the estimation of volume control ventilation air leakage based on pressure waveform and peak value thereof.
Background technology
Respirator is the necessary armarium that rescues patients with respiratory failure, treatment respiratory system disease, can be by the noinvasive ventilation realization that has wound ventilation or wear the ventilation interfaces such as face shield, oronasal mask of tracheal intubation formula, main ventilating mode comprises volume control ventilating mode and pressure controlled ventilation pattern.Although noinvasive ventilation because of its without carry out tracheal intubation, patient tolerability good, be difficult for causing the advantages such as Secondary cases injury of lung, be applied to just more and more family and clinical, yet gas leakage is inevitable problem in noinvasive ventilation.Gas leakage may cause patient's hypoventilation, reduce ventilation toleration, have a strong impact on ventilatory effect, even possibility life-threatening therefore carries out real-time gas leakage and estimates and carry out corresponding gas leakage compensation to be the key issue in noinvasive venting process under noinvasive aeration status.The present invention has built the evaluation method that a kind of respirator carries out the lower air leakage of volume control ventilation, can realize the approximate evaluation of gas leakage degree, can carry out the quantitative estimation of air leakage again, can predict in the expiratory phase of breathing cycle the air leakage in whole cycle, in order quantitatively to leak gas, compensation provides theoretical reference.The concrete steps of the volume control ventilation air leakage evaluation method the present invention relates to comprise, in volume control venting process, at air feed end, detect in real time gas circuit pressure, according to gas circuit pressure waveform feature, with reference to pressure waveform standard curve, sort out and estimate gas leakage degree, and utilizing the gas circuit pressure peak at the ventilation initial stage occurring to estimate the air leakage in the current breathing cycle according to pressure peak-air leakage relation function.
Summary of the invention
The present invention seeks to build the method for air leakage estimation in a kind of noinvasive volume control venting process, by the identification to gas circuit pressure waveform feature, the invention provides a kind of method of controlling ventilation air leakage based on pressure waveform estimated capacity.
Its step comprises, under noinvasive volume control ventilating mode, at respirator air feed end, gather gas circuit pressure signal, obtain venting pressure waveform and pressure peak, thereby the pressure waveform curve that utilization collects and pressure waveform standard curve are compared and are determined gas leakage grade, are related to that the pressure peak of utilization extraction is estimated the air leakage in this breathing cycle based on pressure peak-gas leakage.
Further, the collection of gas circuit pressure signal as above is, near being arranged in respirator suction end on the pipeline being connected with sufferer at respirator, the pressure signal that pressure transducer gathers gas circuit is set;
Further, pressure waveform as above and pressure peak by the feature of collection pressure signal, pressure waveform curve can be described by 3 characteristic points, comprising pressure peak and pressure curve descending branch flex point;
Further, pressure waveform standard curve as above be one group for distinguishing the typical pressure wavy curve of gas leakage degree, comprising under volume control aeration condition without gas leakage, a small amount of gas leakage (gas leakage is 10% below), middle amount gas leakage (gas leakage 10-35%), (gas leakage is greater than 35%) the 4 kinds of corresponding pressure waveforms of gas leakage degree that leak gas in a large number;
Further, pressure peak-air leakage relation function as above is the linear relationship of the lower gas circuit pressure peak of volume control ventilation and this breathing cycle air leakage, and its form is: V
leak=K ﹒ P
max+ B, wherein V
leakbeing approximate air leakage in the breathing cycle, is gas circuit pressure peak, and K and B are that parameter is based on gas leakage test experience platform, on the basis of great amount of samples experiment, obtain;
Further, air leakage estimation as above is to carry out linear operation by gas circuit pressure peak being brought into pressure peak-air leakage relation function, obtains approximate air leakage in this breathing cycle.
Accompanying drawing explanation
Fig. 1 method implementing procedure figure
Fig. 2 gas circuit pressure waveform characteristic point labelling in the breathing cycle
Fig. 3 pressure waveform standard curve
Fig. 4 pressure peak-air leakage relation function curve
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail.
Be illustrated in figure 1 a kind of key step of controlling the method for ventilation air leakage based on pressure waveform estimated capacity, specifically comprise:
(1) for the ventilation of respirator volume control noinvasive, at respirator air feed end, place gas pressure sensor, with venting process Real-time Collection gas circuit pressure signal;
(2) according to collected gas circuit pressure signal, form the pressure waveform curve of breathing cycle one by one, as shown in Figure 2, and gas circuit pressure signal is extracted to wavy curve characteristic point, as A point, B point, the C point that Fig. 4 marked, wherein A point is the peak point of gas circuit pressure, and B point is for being dropped to the flex point of platform section by peak point, and C point is the flex point from platform section to very fast descending branch.
(3) the gas circuit pressure waveform curve obtaining and pressure waveform standard curve are compared and then estimated gas leakage degree, as shown in Figure 3, when a small amount of gas leakage (gas leakage is less than 10%) occurs, A, B, tri-characteristic points of C are all visible, but A point declines to some extent, when continuing to increase (10%< air leakage <35%) B point while reaching medium, gas leakage degree fades away, when very large (air leakage >35%) C point of gas leakage degree fades away;
(4) according to gas circuit pressure peak, can be brought in pressure peak-air leakage relation function and calculate the approximation of trying to achieve air leakage, wherein pressure peak-air leakage relation function is first-order linear function V
leak=172P
max+ 584, its curve as shown in Figure 4;
The method of controlling ventilation air leakage based on pressure waveform estimated capacity is based on gas circuit pressure detecting, and the serial pressure waveform standard curve of reference and pressure peak-air leakage relation function are realized.Wherein utilize detected pressures wavy curve and pressure waveform standard curve to compare the gas leakage degree that only can obtain being similar to, and utilize gas circuit pressure peak and air leakage relation function can obtain quantitative air leakage.
Claims (5)
1. based on pressure waveform estimated capacity, control a method for ventilation air leakage, it is characterized in that, with volume control pattern, carry out the ventilation air leakage estimation under noinvasive aeration condition, concrete steps comprise:
When sufferer (02) being carried out to noinvasive ventilation based on respirator (01) with volume control pattern, at respirator air feed end placement force sensor (03), carry out the detection of gas circuit pressure;
By pressure transducer (03) Real-time Collection, to the pressure signal in gas circuit, obtain real-time pressure waveform signal (04), obtain pressure waveform feature, comprise pressure peak, pressure waveform decline flex point;
Gas circuit pressure signal in the breathing cycle, obtains pressure curve waveform, with reference to pressure waveform standard curve (06), compares, and realizes the estimation of gas leakage degree (07);
Utilize the pressure peak (05) of extracting, and according to based on pressure peak-air leakage approximation relation function (08), estimate, obtain the approximate air leakage (09) of each breathing cycle in volume control venting process.
2. as claimed in claim 1; A kind of method based on pressure waveform estimated capacity control ventilation air leakage has been utilized gas circuit pressure waveform information (04), it is characterized in that: in volume control venting process at air feed end Real-time Collection gas circuit pressure signal, the characteristic point of extracting pressure waveform (04), comprises pressure peak point (A), descending branch the first flex point (B) and descending branch Second Inflexion Point (C).
3. as claimed in claim 1, the method of controlling ventilation air leakage based on pressure waveform estimated capacity has been utilized the leak gas estimation of degree of volume control ventilation downforce waveform standard curve (06), it is characterized in that: pressure waveform standard curve (06) comprises under volume control aeration condition without gas leakage, a small amount of gas leakage (gas leakage is 10% below), middle amount gas leakage (gas leakage 10-35%), the corresponding pressure waveform feature of (gas leakage is greater than 35%) 4 kinds of gas leakage degree of leaking gas in a large number.
4. as claimed in claim 1, based on pressure waveform estimated capacity, control the method for ventilation air leakage and utilized pressure peak-air leakage relation function (08) to carry out an estimation for air leakage (09) in the breathing cycle, it is characterized in that: air leakage (09) is to carry out linear operation and obtain by gas circuit pressure peak being brought into pressure peak-air leakage relation function.
5. as described in right 1, a kind of method based on pressure waveform estimated capacity control ventilation air leakage has been utilized pressure peak-air leakage relation function (08), it is characterized in that: pressure peak-air leakage relation function (08) has been described the linear relationship of the lower gas circuit pressure peak of volume control ventilation and this breathing cycle air leakage, and its form is: V
leak=K ﹒ P
max+ B, wherein V
leakbeing approximate air leakage in the breathing cycle, is gas circuit pressure peak, and K and B are that parameter is based on gas leakage test experience platform, on the basis of great amount of samples experiment, obtain.
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| CN201410232734.2A CN103977492B (en) | 2014-05-29 | 2014-05-29 | A kind of method controlling ventilation air leakage based on pressure waveform estimated capacity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963835A (en) * | 2016-04-21 | 2016-09-28 | 广州七喜医疗设备有限公司 | VCV (volume-controlled ventilation) gas leakage compensating method |
| CN106975135A (en) * | 2017-04-11 | 2017-07-25 | 湖南明康中锦医疗科技发展有限公司 | Method and device for air leakage compensation of respirator and noninvasive respirator |
| CN108287043A (en) * | 2017-12-29 | 2018-07-17 | 湖南明康中锦医疗科技发展有限公司 | Lung ventilator gas leakage quantity measuring method, device, storage medium and computer equipment |
| WO2020037513A1 (en) * | 2018-08-21 | 2020-02-27 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation detection method and device, ventilation apparatus, and storage medium |
| CN114681736A (en) * | 2022-03-30 | 2022-07-01 | 广东省医疗器械质量监督检验所 | Respirator abnormality detection method and respirator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080185002A1 (en) * | 2000-03-03 | 2008-08-07 | Michael Berthon-Jones | Adjustment of ventilator pressure-time profile to balance comfort and effectiveness |
| US20100186741A1 (en) * | 2009-01-29 | 2010-07-29 | Aylsworth Alonzo C | Method and System for Detecting Mouth Leak During Application of Positive Airway Pressure |
| CN102944371A (en) * | 2012-11-06 | 2013-02-27 | 北京航空航天大学 | Detection system for noninvasive ventilation interface |
| CN103071213A (en) * | 2011-10-25 | 2013-05-01 | 北京航天长峰股份有限公司 | Leakage compensation method for single-loop non-invasive ventilators |
| CN103180002A (en) * | 2010-07-30 | 2013-06-26 | 雷斯梅德有限公司 | Methods and devices with leak detection |
| US20140041656A1 (en) * | 2010-02-10 | 2014-02-13 | Covidien Lp | Leak determination in a breathing assistance system |
-
2014
- 2014-05-29 CN CN201410232734.2A patent/CN103977492B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080185002A1 (en) * | 2000-03-03 | 2008-08-07 | Michael Berthon-Jones | Adjustment of ventilator pressure-time profile to balance comfort and effectiveness |
| US20100186741A1 (en) * | 2009-01-29 | 2010-07-29 | Aylsworth Alonzo C | Method and System for Detecting Mouth Leak During Application of Positive Airway Pressure |
| US20140041656A1 (en) * | 2010-02-10 | 2014-02-13 | Covidien Lp | Leak determination in a breathing assistance system |
| CN103180002A (en) * | 2010-07-30 | 2013-06-26 | 雷斯梅德有限公司 | Methods and devices with leak detection |
| CN103071213A (en) * | 2011-10-25 | 2013-05-01 | 北京航天长峰股份有限公司 | Leakage compensation method for single-loop non-invasive ventilators |
| CN102944371A (en) * | 2012-11-06 | 2013-02-27 | 北京航空航天大学 | Detection system for noninvasive ventilation interface |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963835A (en) * | 2016-04-21 | 2016-09-28 | 广州七喜医疗设备有限公司 | VCV (volume-controlled ventilation) gas leakage compensating method |
| CN105963835B (en) * | 2016-04-21 | 2018-03-06 | 广州七喜医疗设备有限公司 | A kind of method of VCV leak compensations |
| CN106975135A (en) * | 2017-04-11 | 2017-07-25 | 湖南明康中锦医疗科技发展有限公司 | Method and device for air leakage compensation of respirator and noninvasive respirator |
| CN106975135B (en) * | 2017-04-11 | 2019-09-27 | 湖南明康中锦医疗科技发展有限公司 | Method and device for air leakage compensation of respirator and noninvasive respirator |
| CN108287043A (en) * | 2017-12-29 | 2018-07-17 | 湖南明康中锦医疗科技发展有限公司 | Lung ventilator gas leakage quantity measuring method, device, storage medium and computer equipment |
| CN108287043B (en) * | 2017-12-29 | 2020-03-10 | 湖南明康中锦医疗科技发展有限公司 | Breathing machine air leakage detection method and device, storage medium and computer equipment |
| WO2020037513A1 (en) * | 2018-08-21 | 2020-02-27 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation detection method and device, ventilation apparatus, and storage medium |
| CN114681736A (en) * | 2022-03-30 | 2022-07-01 | 广东省医疗器械质量监督检验所 | Respirator abnormality detection method and respirator |
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| CN103977492B (en) | 2016-04-27 |
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