CN105194776A - Method for controlling air passage pressure of breathing machine - Google Patents

Method for controlling air passage pressure of breathing machine Download PDF

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Publication number
CN105194776A
CN105194776A CN201510540448.7A CN201510540448A CN105194776A CN 105194776 A CN105194776 A CN 105194776A CN 201510540448 A CN201510540448 A CN 201510540448A CN 105194776 A CN105194776 A CN 105194776A
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processing unit
airway pressure
pressure
value
control
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CN105194776B (en
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廖妍
何思桥
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Chongqing Technology and Business Institute
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Abstract

The invention discloses a method for controlling the air passage pressure of a breathing machine and relates to the field of automatic control. According to the method, the collected air passage pressure is compensated dynamically according to the collected air passage pressure value and a changing trend of the air passage pressure to enable the breathing machine to be capable of accurately predicting a regulating quantity of the air passage pressure so as to perform adaptive regulation on the air pressure of a breathing pipeline of a patient, thereby improving control stability of the air pressure of the breathing pipeline of the patient and ensuring the adaptability of the method for controlling the air passage pressure in different use environments.

Description

A kind of respirator airway pressure control method
Technical field
The present invention relates to automation control area, particularly relate to a kind of respirator airway pressure control method.
Background technology
PEEP valve and end expiratory positive pressure valve, be mainly used in respirator, and being beneficial to pulmonary has the patient of pathological changes to carry out respiratory ventilation.When end-tidal airway open, airway pressure is still kept above atmospheric pressure, subsides to prevent alveolar collapse.When PEEP increases extremely, the required acting of patient exhales increases and causes expiratory dyspnea, and asphyxiation hazard and work of breathing may be caused to increase.At present, the mechanical type end expiratory positive pressure control mode of Use of respirator, accurately can not control it and exhale last pressure and end expiratory positive pressure cannot continuously adjustabe, safety coefficient is not enough, and air consumption is high simultaneously.
The operation principle of PEEP valve is the size by regulating electric current, controls the opening pressure of diaphragm.The advantage of this valve is that the linearity is relatively good.Current common using method is, first by test, calibrates the opening pressure of diaphragm corresponding to each current point, obtains the correspondence table of pressure and electric current.Then according to the pressure expecting to obtain, table look-up and find corresponding current value, obtained the PEEP pressure expected by given electric current.Existing respirator controls according to the airway pressure data collected simultaneously, and substantially the data gathered are not processed, cause the voltage-controlled of respirator to there is the shortcoming that delay is high, low-response, pressure acquisition are inaccurate, adaptive capacity is poor and stability is not high, to such an extent as to PEEP valve cannot reach very high operating accuracy.Because obtain very high operating accuracy, then must obtain the correspondence table of meticulousr pressure and electric current, this needs test loaded down with trivial details in a large number.And this meticulous tabular value will be stored also need very large memory space.Quote this meticulous tabular value to calculate simultaneously, also need a large amount of system times and resource.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide one can carry out Real-Time Monitoring to patient respiration loine pressure, and the respirator airway pressure control method higher to PEEP valve control accuracy.
For achieving the above object, the invention provides a kind of respirator airway pressure control method, adopt respirator air flue control system to control, described respirator air flue control system comprises: processing unit, air-channel system, the PEEP valve being controlled by processing unit and driver element thereof; Air-channel system comprises breathing circuit, and described breathing circuit is communicated with inlet valve and described PEEP valve respectively by gas path pipe; Described PEEP valve is used for driving gas to be discharged in air; Described breathing circuit is also connected with air-breathing branch road and expiration branch road; Described expiration branch road is provided with airway pressure sensor; Described airway pressure sensor is for gathering the force value in the air flue at exhalation cycle end; The signal output part of described airway pressure sensor connects the signal input part of described processing unit, first control signal outfan of described processing unit connects the driver element of described PEEP valve, and described processing unit is by the break-make of PEEP valve described in described drive unit drives; Second control signal outfan of described processing unit connects the control signal input of described inlet valve; Carry out according to the following steps:
Step one, be input in processing unit by the pressure value P 1 of setting, described processing unit draws corresponding current value I1 according to stored synopsis and utilizes this current value I1 to control described PEEP valve and opens;
Step 2, at exhalation cycle end, described pressure transducer detects airway pressure in expiration branch road and to the airway pressure force value Q detected tcompensate, then by the airway pressure force value Z after compensation cflow to described processing unit;
Step 3, by described processing unit calculation deviation value Δ P=Z cwhether-P1, judgment bias value Δ P be in desired span of control;
When Δ P is not in desired span of control, then obtain adjusted value P1 ' according to P1 '=P1+ Δ P × K; Described processing unit is using adjusted value P1 ' as setup pressure value, and circulation carries out above-mentioned steps one to step 3, until deviate is in desired span of control; Described K is the scale factor controlling adjustment, 0.4 < K < 0.9;
When Δ P is in desired span of control, described processing unit judges whether to receive and ceases and desist order, and terminates when processing unit receives and ceases and desist order; Execution step 2 is returned when processing unit does not receive and ceases and desist order;
To the airway pressure force value Q detected in step 2 tcompensate and perform according to the following steps:
The airway pressure force value that S1, setting collect is Q t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P a, setting judgment threshold is R; Calculate P a=Q a-Q a-1obtain P a; Judge whether P a>=R, works as P aduring>=R, by Q adelete; Work as P aduring < R, by Q astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M b, described b is positive integer;
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N c, calculate obtain pressure compensation Parameter N c; Described M c∈ { M band c>=3, c are integer;
S4, to { M ccompensate;
Airway pressure force value after setting compensation is Z c, calculate Z c = M c - | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 > 0 M c + | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 < 0 M c + | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 < 0 M c - | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 > 0 M c i f M C - 1 - M c - 2 = 0 M c i f M C - M c - 1 = 0 Airway pressure force value Z after being compensated c.
Adopt above technical scheme, filtering is carried out to the airway pressure force value collected, effectively can overcome the fluctuation interference that accidental factor causes, for follow-up date processing provides airway pressure collecting unit value accurately.Then by calculating pressure compensating parameter, the force value collected is compensated, the pressure divergence collected due to traditional respirator is large and dynamic response is poor, the trend of pressure change is lacked and considers, therefore must compensate pressure, the pressure compensation parameter adopting the technical program to obtain and compensation way, can compensate the airway pressure gathered according to the airway pressure force value collected and airway pressure variation tendency dynamically, make respirator can accurate anticipation airway pressure regulated quantity, to carry out adaptive adjustment to patient respiration pipeline air pressure, improve the stability that patient respiration pipeline air pressure controls, ensure that the adaptability of this airway pressure control method in different environment for use.The present invention improves precision by closed loop control, the end-tidal airway pressure force value of Real-Time Monitoring PEEP valve control in the controlling, and it can be used as feedback, constantly calculates and adjustment PEEP valve, makes the precision that the output of PEEP valve reaches higher.Simultaneously owing to still using the correspondence table of simple pressure and electric current, simplify the calibration process of PEEP valve, reduce the memory space of tabular value, decrease computation time.
The invention has the beneficial effects as follows: the present invention can accurate anticipation airway pressure regulated quantity, to carry out adaptive adjustment to patient respiration pipeline air pressure, improve the stability that patient respiration pipeline air pressure controls, ensure that the adaptability of this airway pressure control method in different environment for use.This invention simplifies the calibration process of PEEP valve simultaneously, reduce the memory space of tabular value, decrease computation time.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the respirator air flue control system of the embodiment of the invention.
Fig. 2 is the schematic flow sheet of the embodiment of the invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, a kind of respirator air flue control system, comprising: processing unit 1, air-channel system 2, the PEEP valve 3 being controlled by processing unit 1 and driver element 4 thereof; Air-channel system comprises breathing circuit 2, and described breathing circuit 2 is communicated with inlet valve 6 and described PEEP valve 3 respectively by gas path pipe; Described PEEP valve 3 is for being discharged in air by driving gas; Described breathing circuit 2 is also connected with air-breathing branch road and expiration branch road; Described expiration branch road is provided with airway pressure sensor 5; Described airway pressure sensor 5 is for gathering the force value in the air flue at exhalation cycle end; The signal output part of described airway pressure sensor 5 connects the signal input part of described processing unit 1, first control signal outfan of described processing unit 1 connects the driver element 4 of described PEEP valve 3, and described processing unit 1 drives the break-make of described PEEP valve 3 by described driver element 4; Second control signal outfan of described processing unit 1 connects the control signal input of described inlet valve 6.Gas enters the exocoel of the bellows in breathing circuit by inlet valve, and the air bag in compression bellows moves downward, and makes gas in capsule flow into patient end via air-breathing branch road, makes patient's suction gas.The folded airbag that gas gets back to bellows in breathing circuit by patient end through expiration branch road is inner, promotes air bag rising and the driving gas outside bellows is discharged in air via PEEP valve.
As shown in Figure 2, a kind of respirator airway pressure control method, adopts respirator air flue control system to carry out according to the following steps:
Step one, be input in processing unit 1 by the pressure value P 1 of setting, described processing unit 1 draws corresponding current value I1 according to stored synopsis and utilizes this current value I1 to control described PEEP valve 3 and makes it be opened to aperture corresponding to current value I1.
Step 2, at exhalation cycle end, described airway pressure sensor 5 detects airway pressure in expiration branch road and to the airway pressure force value Q detected tcompensate, then by the airway pressure force value Z after compensation cflow to described processing unit 1.
Step 3, by described processing unit 1 calculation deviation value Δ P=Z cwhether-P1, judgment bias value Δ P be in desired span of control.
When Δ P is not in desired span of control, then obtain adjusted value P1 ' according to P1 '=P1+ Δ P × K; Described processing unit 1 is using adjusted value P1 ' as setup pressure value, and circulation carries out above-mentioned steps one to step 3, until deviate is in desired span of control; Described K is the scale factor controlling adjustment, 0.4 < K < 0.9.
When Δ P is in desired span of control, described processing unit 1 judges whether to receive ceases and desist order, and terminates when processing unit 1 receives and ceases and desist order; Execution step 2 is returned when processing unit 1 does not receive and ceases and desist order.
To the airway pressure force value Q detected in step 2 tcompensate and perform according to the following steps:
The airway pressure force value that S1, setting collect is Q t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P a, setting judgment threshold is R; Calculate P a=Q a-Q a-1obtain P a; Judge whether P a>=R, works as P aduring>=R, by Q adelete; Work as P aduring < R, by Q astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M b, described b is positive integer.At least gather in described effective pressure ordered series of numbers and have 4 effective pressure values; Force value in described effective pressure ordered series of numbers is by acquisition order arrangement, and first the effective pressure value collected is M 1, second virtual value collected is M 2... b the effective pressure value collected is M b.This programme gathers pressure Q from second 2the mutation pressure data that namely starting excludes the interference signal causes, the filtering impact of environment, ensure that data precision and the effectiveness of collection;
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N c, calculate obtain pressure compensation Parameter N c; Described M c∈ { M band c>=3, c are integer;
S4, to { M ccompensate;
Airway pressure force value after setting compensation is Z c, calculate Z c = M c - | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 > 0 M c + | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 < 0 M c + | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 < 0 M c - | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 > 0 M c i f M C - 1 - M c - 2 = 0 M c i f M C - M c - 1 = 0 Airway pressure force value Z after being compensated c.
In above scheme, work as M c-1-M c-2> 0 and M c-M c-1> 0, then airway pressure is for continuing the rising stage, works as M c-1-M c-2> 0 and M c-M c-1< 0, then the influenced decline of airway pressure, works as M c-1-M c-2< 0 and M c-M c-1< 0, then airway pressure is the continuous decrease phase, works as M c-1-M c-2< 0 and M c-M c-1> 0, then the influenced rising of airway pressure, works as M c-1-M c-2=0 or M c-M c-1when=0, airway pressure is in stable phase.Above scheme is in different trend according to airway pressure, takes corresponding compensation way, and what avoid mistake carries out pressure compensation, improves airway pressure degree of stability, can carry out pressure controlling dynamically in Use of respirator.
The present invention can accurate anticipation airway pressure regulated quantity, and according to airway pressure variation tendency, airway pressure is compensated, improve the stability that airway pressure controls, simultaneously owing to largely eliminating the impact of interfering data, ensure that the adaptability of this airway pressure control method in varying environment.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (1)

1. a respirator airway pressure control method, adopt respirator air flue control system to control, described respirator air flue control system comprises: processing unit (1), breathing circuit (2), the PEEP valve (3) being controlled by processing unit (1) and driver element (4) thereof; Described breathing circuit (2) is communicated with inlet valve (6) and described PEEP valve (3) respectively by gas path pipe; Described PEEP valve (3) is for being discharged in air by driving gas; Described breathing circuit (2) is also connected with air-breathing branch road and expiration branch road; Described expiration branch road is provided with airway pressure sensor (5); Described airway pressure sensor (5) is for gathering the force value in the air flue at exhalation cycle end; The signal output part of described airway pressure sensor (5) connects the signal input part of described processing unit (1), first control signal outfan of described processing unit (1) connects the driver element (4) of described PEEP valve (3), and described processing unit (1) drives the break-make of described PEEP valve (3) by described driver element (4); Second control signal outfan of described processing unit (1) connects the control signal input of described inlet valve (6); It is characterized in that carrying out according to the following steps:
Step one, be input in processing unit (1) by the pressure value P 1 of setting, described processing unit (1) draws corresponding current value I1 according to stored synopsis and utilizes this current value I1 to control described PEEP valve (3) and opens;
Step 2, at exhalation cycle end, described airway pressure sensor (5) detects airway pressure in expiration branch road and to the airway pressure force value Q detected tcompensate, then by the airway pressure force value Z after compensation cflow to described processing unit (1);
Step 3, by described processing unit (1) calculation deviation value Δ P=Z cwhether-P1, judgment bias value Δ P be in desired span of control;
When Δ P is not in desired span of control, then obtain adjusted value P1 ' according to P1 '=P1+ Δ P × K; Described processing unit (1) is using adjusted value P1 ' as setup pressure value, and circulation carries out above-mentioned steps one to step 3, until deviate is in desired span of control; Described K is the scale factor controlling adjustment, 0.4 < K < 0.9;
When Δ P is in desired span of control, described processing unit (1) judges whether to receive ceases and desist order, and terminates when processing unit (1) receives and ceases and desist order; Execution step 2 is returned when processing unit (1) does not receive and ceases and desist order;
To the airway pressure force value Q detected in step 2 tcompensate and perform according to the following steps:
The airway pressure force value that S1, setting collect is Q t, described t is positive integer;
S2, acquisition effective pressure ordered series of numbers;
Setting effective judgment value is P a, setting judgment threshold is R; Calculate P a=Q a-Q a-1obtain P a; Judge whether P a>=R, works as P aduring>=R, by Q adelete; Work as P aduring < R, by Q astored in effective pressure ordered series of numbers; 2≤a≤t and a is integer; Described R > 0; Set described effective pressure ordered series of numbers as { M b, described b is positive integer;
S3, calculating pressure compensating parameter;
Setting described pressure compensation parameter is N c, calculate obtain pressure compensation Parameter N c; Described M c∈ { M band c>=3, c are integer;
S4, to { M ccompensate;
Airway pressure force value after setting compensation is Z c, calculate Z c = M c - | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 > 0 M c + | N c | i f M C - 1 - M c - 2 > 0 a n d M C - M c - 1 < 0 M c + | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 < 0 M c - | N c | i f M C - 1 - M c - 2 < 0 a n d M C - M c - 1 > 0 M c i f M C - 1 - M c - 2 = 0 M c i f M C - M c - 1 = 0 Airway pressure force value Z after being compensated c.
CN201510540448.7A 2015-08-28 2015-08-28 A kind of lung ventilator air flue compress control method Expired - Fee Related CN105194776B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105854142A (en) * 2016-05-10 2016-08-17 苏州鱼跃医疗科技有限公司 Respirator treatment pressure stabilizing method based on back propagation algorithm
CN113144300A (en) * 2021-03-12 2021-07-23 中国人民解放军联勤保障部队第九二〇医院 Gastrointestinal decompression device, decompression system and decompression method for clinical use in digestive system department
WO2021147227A1 (en) * 2020-01-20 2021-07-29 深圳市科曼医疗设备有限公司 Mixing cavity pressure control method, ventilator device, and computer readable storage medium
CN113198074A (en) * 2021-04-15 2021-08-03 深圳市普博医疗科技股份有限公司 Breathing machine airway pressure correction method and device and breathing machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050051168A1 (en) * 2003-08-04 2005-03-10 Devries Douglas F. Portable ventilator system
CN101468223A (en) * 2007-12-29 2009-07-01 北京谊安医疗***股份有限公司 Method for improving working accuracy of PEEP valve
US20130317765A1 (en) * 2010-07-30 2013-11-28 Resmed Limited Methods and devices with leak detection
CN103977491A (en) * 2003-06-20 2014-08-13 雷斯梅德有限公司 Method and apparatus for improving the comfort of CPAP

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103977491A (en) * 2003-06-20 2014-08-13 雷斯梅德有限公司 Method and apparatus for improving the comfort of CPAP
US20050051168A1 (en) * 2003-08-04 2005-03-10 Devries Douglas F. Portable ventilator system
CN101468223A (en) * 2007-12-29 2009-07-01 北京谊安医疗***股份有限公司 Method for improving working accuracy of PEEP valve
US20130317765A1 (en) * 2010-07-30 2013-11-28 Resmed Limited Methods and devices with leak detection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郭军涛: "呼吸机测控***的研究", 《中国优秀博硕士学位论文全文数据库（硕士） 医药卫生科技辑》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105854142A (en) * 2016-05-10 2016-08-17 苏州鱼跃医疗科技有限公司 Respirator treatment pressure stabilizing method based on back propagation algorithm
CN105854142B (en) * 2016-05-10 2018-08-31 苏州鱼跃医疗科技有限公司 A kind of respirator treatment pressure stability method based on back-propagation algorithm
WO2021147227A1 (en) * 2020-01-20 2021-07-29 深圳市科曼医疗设备有限公司 Mixing cavity pressure control method, ventilator device, and computer readable storage medium
CN113144300A (en) * 2021-03-12 2021-07-23 中国人民解放军联勤保障部队第九二〇医院 Gastrointestinal decompression device, decompression system and decompression method for clinical use in digestive system department
CN113198074A (en) * 2021-04-15 2021-08-03 深圳市普博医疗科技股份有限公司 Breathing machine airway pressure correction method and device and breathing machine
CN113198074B (en) * 2021-04-15 2023-12-12 深圳市普博医疗科技股份有限公司 Airway pressure correction method and device of breathing machine and breathing machine

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