CN105194776B - A kind of lung ventilator air flue compress control method - Google Patents
A kind of lung ventilator air flue compress control method Download PDFInfo
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- CN105194776B CN105194776B CN201510540448.7A CN201510540448A CN105194776B CN 105194776 B CN105194776 B CN 105194776B CN 201510540448 A CN201510540448 A CN 201510540448A CN 105194776 B CN105194776 B CN 105194776B
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Abstract
The invention discloses a kind of lung ventilator air flue compress control method, it is related to automation control area, the airway pressure of collection is compensated according to the airway pressure force value collected and airway pressure variation tendency by dynamic, lung ventilator is enabled accurately to prejudge airway pressure regulated quantity, to carry out the regulation of adaptability to patient respiration pipeline air pressure, the stability of patient respiration pipeline pressure control is improved, ensure that adaptability of this airway pressure control method in different use environments.
Description
Technical field
The present invention relates to automation control area, more particularly to a kind of lung ventilator air flue compress control method.
Background technology
PEEP valves are end-expiratory positive pressure valve, are mainly used in lung ventilator, so that the patient that there is lesion in lung is exhaled
Inhale ventilation.In end-tidal airway open, airway pressure is still kept above atmospheric pressure, to prevent alveolar collapse from collapsing.Work as PEEP
It is abnormal and when increasing, patient exhale needed for acting increase and cause expiratory dyspnea, asphyxiation hazard and work of breathing increase may be caused.
At present, the mechanical end-expiratory positive pressure control mode of Use of respirator, it is impossible to accurately control it to exhale last pressure and end-expiratory positive pressure
Can not continuously adjustabe, safety coefficient deficiency, while air consumption is high.
The operation principle of PEEP valves is the size by adjusting electric current, to control the Opening pressure of diaphragm.This valve it is excellent
Point is that the linearity is relatively good.Current common application method is, first by test, to calibrate diaphragm corresponding to each current point
Opening pressure, obtain the corresponding table of pressure and electric current.Then according to the pressure for it is expected to obtain, table look-up and find corresponding electric current
Value, desired PEEP pressure is obtained by given electric current.Existing lung ventilator enters according to the airway pressure data collected simultaneously
Row control, and substantially the data of collection are not handled, cause the voltage-controlled of lung ventilator delay height, low-response, pressure to be present
The shortcomings that power collection is inaccurate, adaptability difference and stability is not high, so that PEEP valves are unable to reach very high operating accuracy.
Because obtaining very high operating accuracy, then finer pressure and the corresponding table of electric current must be obtained, this needs a large amount of tired
Trivial test.And to store this fine tabular value and be also required to very big memory space.Simultaneously this fine tabular value is quoted to enter
Row calculates, it is also desirable to substantial amounts of system time and resource.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention are to provide one kind can be to patient
Breathing pipeline pressure is monitored in real time, and the lung ventilator air flue compress control method higher to PEEP valve control accuracies.
To achieve the above object, the invention provides a kind of lung ventilator air flue compress control method, using lung ventilator air flue
Control system is controlled, and the lung ventilator air flue control system includes：Processing unit, air-channel system, it is controlled by processing unit
PEEP valves and its driver element；Air-channel system includes breathing circuit, and the breathing circuit is connected by gas path pipe respectively to be inhaled
Air valve and the PEEP valves；The PEEP valves are used to driving gas being discharged in air；The breathing circuit is also associated with air-breathing
Branch road and expiration branch road；The expiration branch road is provided with airway pressure sensor；The airway pressure sensor is exhaled for collection
Pressure value in the air flue in the end of term in gas week；The signal output part of the airway pressure sensor connects the signal of the processing unit
Input, the first control signal output of the processing unit connect the driver element of the PEEP valves, the processing unit
The break-make of the PEEP valves is driven by the driver element；Described in the second control signal output connection of the processing unit
The control signal input of inlet valve；Carry out according to the following steps：
Step 1: the pressure value P 1 of setting is input in processing unit, the processing unit is according to the control stored
Table draws corresponding current value I1 and controls the PEEP valves to open using current value I1；
Step 2: at exhalation cycle end, the pressure sensor detects the airway pressure in expiration branch road and to detecting
Airway pressure force value QtCompensate, then by the airway pressure force value Z after compensationcIt is conveyed to the processing unit；
Step 3: deviation Δ P=Z is calculated by the processing unitc- P1, whether judgment bias value Δ P is desired
In control range；
When Δ P is not in desired control range, then adjusted value P1 ' is obtained according to P1 '=P1+ Δs P × K；It is described
Processing unit is using adjusted value P1 ' as setup pressure value, and circulation carries out above-mentioned steps one to step 3, until deviation is in institute's phase
In the control range of prestige；The K is to control the scale factor adjusted, 0.4 ＜ K ＜ 0.9；
When Δ P is in desired control range, the processing unit, which judges whether to receive, ceases and desist order, and works as processing
Unit receives to be terminated when ceasing and desisting order；Returned when processing unit, which is not received by, ceases and desist order and perform step 2；
Airway pressure force value Q in step 2 to detectingtCompensate and perform according to the following steps：
S1, the airway pressure force value collected is set as Qt, the t is positive integer；
S2, obtain effective pressure ordered series of numbers；
Effective judgment value is set as Pa, judgment threshold is set as R；Calculate Pa=Qa-Qa-1Obtain Pa；Judge whether Pa>=R,
Work as PaDuring >=R, by QaDelete；Work as PaDuring ＜ R, by QaIt is stored in effective pressure ordered series of numbers；2≤a≤t and a are integer；The R ＞ 0；
The effective pressure ordered series of numbers is set as { Mb, the b is positive integer；
S3, calculate pressure compensation parameter；
The pressure compensation parameter is set as Nc, calculateObtain pressure compensation parameter Nc；The Mc∈
{MbAnd c >=3, c be integer；
S4, to McCompensate；
Airway pressure force value after setting compensation is Zc, calculate
After being compensated
Airway pressure force value Zc。
Using above technical scheme, the airway pressure force value collected is filtered, can effectively overcome accidental factor
Caused fluctuation interference, accurate airway pressure collecting unit value is provided for follow-up data processing.Then pressed by calculating
Force compensating parameter compensates to the pressure value collected, because the pressure divergence that traditional lung ventilator collects is big and dynamically loud
Answering property is poor, lacks consideration to the trend of pressure change, it is therefore necessary to pressure is compensated, the pressure obtained using the technical program
Force compensating parameter and compensation way, can be dynamically according to the airway pressure force value and airway pressure variation tendency collected to collection
Airway pressure compensate so that lung ventilator can accurately prejudge airway pressure regulated quantity, with to patient respiration pipeline air pressure
The regulation of adaptability is carried out, the stability of patient respiration pipeline pressure control is improved, ensure that this airway pressure control method
In the adaptability of different use environments.The present invention improves precision by closed-loop control, the monitoring PEEP valve controls in real time in control
The end-tidal airway pressure force value of system, and as feedback, constantly calculate and adjust PEEP valves, reach the output of PEEP valves
Higher precision.Simultaneously because still the calibration process of PEEP valves is simplified, is subtracted using simple pressure and the corresponding table of electric current
The small memory space of tabular value, decrease and calculate the time.
The beneficial effects of the invention are as follows：The present invention can accurately prejudge airway pressure regulated quantity, with to patient respiration pipeline
Air pressure carries out the regulation of adaptability, improves the stability of patient respiration pipeline pressure control, ensure that this airway pressure controls
Adaptability of the method in different use environments.Simultaneously this invention simplifies the calibration process of PEEP valves, the storage of tabular value is reduced
Space, decrease and calculate the time.
Brief description of the drawings
Fig. 1 is the principle schematic of the lung ventilator air flue control system of the embodiment of the invention.
Fig. 2 is the schematic flow sheet of the embodiment of the invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
As shown in figure 1, a kind of lung ventilator air flue control system, including：Processing unit 1, air-channel system 2, it is controlled by processing
The PEEP valves 3 and its driver element 4 of unit 1；Air-channel system includes breathing circuit 2, and the breathing circuit 2 passes through gas circuit pipe respectively
Road connects inlet valve 6 and the PEEP valves 3；The PEEP valves 3 are used to driving gas being discharged in air；The breathing circuit 2
It is also associated with inspiration limb and expiration branch road；The expiration branch road is provided with airway pressure sensor 5；The airway pressure sensing
Device 5 is used to gather the pressure value in the air flue at exhalation cycle end；Described in the signal output part connection of the airway pressure sensor 5
The signal input part of processing unit 1, the first control signal output of the processing unit 1 connect the driving of the PEEP valves 3
Unit 4, the processing unit 1 drive the break-make of the PEEP valves 3 by the driver element 4；The second of the processing unit 1
Control signal output connects the control signal input of the inlet valve 6.Gas is entered in breathing circuit by inlet valve
The exocoel of bellows, the air bag compressed in bellows move downward, and intracapsular gas is flowed into patient end via inspiration limb, inhale patient
Enter gas.Gas is returned in breathing circuit inside the folded airbag of bellows by patient end through expiration branch road, and promoting air bag to rise makes
Driving gas outside bellows is discharged in air via PEEP valves.
As shown in Fig. 2 a kind of lung ventilator air flue compress control method, using lung ventilator air flue control system according to the following steps
Carry out：
Step 1: the pressure value P 1 of setting is input in processing unit 1, the processing unit 1 is according to pair stored
Draw corresponding current value I1 according to table and control the PEEP valves 3 it is opened to current value I1 using current value I1 and correspond to
Aperture.
Step 2: at exhalation cycle end, the airway pressure sensor 5 detects the airway pressure in expiration branch road and to inspection
The airway pressure force value Q measuredtCompensate, then by the airway pressure force value Z after compensationcIt is conveyed to the processing unit 1.
Step 3: deviation Δ P=Z is calculated by the processing unit 1c- P1, whether judgment bias value Δ P is desired
Control range in.
When Δ P is not in desired control range, then adjusted value P1 ' is obtained according to P1 '=P1+ Δs P × K；It is 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 deviation is in institute
In desired control range；The K is to control the scale factor adjusted, 0.4 ＜ K ＜ 0.9.
When Δ P is in desired control range, the processing unit 1, which judges whether to receive, ceases and desist order, and works as place
Reason unit 1 receives to be terminated when ceasing and desisting order；Returned when processing unit 1, which is not received by, ceases and desist order and perform step 2.
Airway pressure force value Q in step 2 to detectingtCompensate and perform according to the following steps：
S1, the airway pressure force value collected is set as Qt, the t is positive integer；
S2, obtain effective pressure ordered series of numbers；
Effective judgment value is set as Pa, judgment threshold is set as R；Calculate Pa=Qa-Qa-1Obtain Pa；Judge whether Pa>=R,
Work as PaDuring >=R, by QaDelete；Work as PaDuring ＜ R, by QaIt is stored in effective pressure ordered series of numbers；2≤a≤t and a are integer；The R ＞ 0；
The effective pressure ordered series of numbers is set as { Mb, the b is positive integer.At least collection has 4 effectively in the effective pressure ordered series of numbers
Pressure value；Pressure value in the effective pressure ordered series of numbers is arranged by acquisition order, and the first effective pressure value collected is M1,
Second virtual value collected is M2... b-th of effective pressure value collected is Mb.This programme gathers pressure from second
Q2Start mutation pressure data caused by excluding the interference signal, filtered out the influence of environment, ensure that the data precision of collection
And validity；
S3, calculate pressure compensation parameter；
The pressure compensation parameter is set as Nc, calculateObtain pressure compensation parameter Nc；The Mc∈
{MbAnd c >=3, c be integer；
S4, to McCompensate；
Airway pressure force value after setting compensation is Zc, calculate
After being compensated
Airway pressure force value Zc。
In above scheme, work as MC-1-Mc-2＞ 0 and MC-Mc-1＞ 0, then airway pressure is to continue the rising stage, works as MC-1-Mc-2＞
0 and MC-Mc-1＜ 0, then the impacted decline of airway pressure, works as MC-1-Mc-2＜ 0 and MC-Mc-1＜ 0, then airway pressure is continuous decrease
Phase, work as MC-1-Mc-2＜ 0 and MC-Mc-1＞ 0, then the impacted rising of airway pressure, works as MC-1-Mc-2=0 or MC-Mc-1When=0, air flue
Pressure is in stationary phase.Above scheme is in different trend according to airway pressure, takes corresponding compensation way, avoids mistake
Carry out pressure compensation, improves airway pressure stability, pressure controlling can be dynamically carried out in Use of respirator by mistake.
The present invention can accurately prejudge airway pressure regulated quantity, and airway pressure is carried out according to airway pressure variation tendency
Compensation, improves the stability of airway pressure control, simultaneously because largely eliminating the influence of interference data, ensure that this gas
Adaptability of the road compress control method in varying environment.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (1)
1. a kind of lung ventilator air flue compress control method, is controlled using lung ventilator air flue control system, the lung ventilator gas
Road control system includes：Processing unit (1), breathing circuit (2), the PEEP valves (3) for being controlled by processing unit (1) and its driving are single
First (4)；The breathing circuit (2) connects inlet valve (6) and the PEEP valves (3) by gas path pipe respectively；The PEEP valves
(3) it is used to driving gas being discharged in air；The breathing circuit (2) is also associated with inspiration limb and expiration branch road；It is described to exhale
Gas branch road is provided with airway pressure sensor (5)；The airway pressure sensor (5) is used to gather in the last air flue of exhalation cycle
Pressure value；The signal output part of the airway pressure sensor (5) connects the signal input part of the processing unit (1), institute
The first control signal output for stating processing unit (1) connects the driver element (4) of the PEEP valves (3), the processing unit
(1) break-make of the PEEP valves (3) is driven by the driver element (4)；Second control signal of the processing unit (1) is defeated
Go out the control signal input that end connects the inlet valve (6)；It is characterized in that carry out according to the following steps：
Step 1: the pressure value P 1 of setting is input in processing unit (1), the processing unit (1) is according to pair stored
Corresponding current value I1 is drawn according to table and controls the PEEP valves (3) to open using current value I1；
Step 2: at exhalation cycle end, the airway pressure sensor (5) detects the airway pressure in expiration branch road and to detection
The airway pressure force value Q arrivedtCompensate, then by the airway pressure force value Z after compensationcIt is conveyed to the processing unit (1)；
Step 3: deviation Δ P=Z is calculated by the processing unit (1)c- P1, whether judgment bias value Δ P is in desired control
In the range of system；
When Δ P is not in desired control range, then adjusted value P1 ' is obtained according to P1 '=P1+ Δs P × K；The processing
Unit (1) is using adjusted value P1 ' as setup pressure value, and circulation carries out above-mentioned steps one to step 3, until deviation is in institute's phase
In the control range of prestige；The K is to control the scale factor adjusted, 0.4 ＜ K ＜ 0.9；
When Δ P is in desired control range, the processing unit (1), which judges whether to receive, to be ceased and desisted order, and works as processing
Unit (1) receives to be terminated when ceasing and desisting order；Returned when processing unit (1), which is not received by, ceases and desist order and perform step 2；
Airway pressure force value Q in step 2 to detectingtCompensate and perform according to the following steps：
S1, the airway pressure force value collected is set as Qt, the t is positive integer；
S2, obtain effective pressure ordered series of numbers；
Effective judgment value is set as Pa, judgment threshold is set as R；Calculate Pa=Qa-Qa-1Obtain Pa；Judge whether Pa>=R, works as Pa
During >=R, by QaDelete；Work as PaDuring ＜ R, by QaIt is stored in effective pressure ordered series of numbers；2≤a≤t and a are integer；The R ＞ 0；Setting
The effective pressure ordered series of numbers is { Mb, the b is positive integer；
S3, calculate pressure compensation parameter；
The pressure compensation parameter is set as Nc, calculateObtain pressure compensation parameter Nc；The Mc∈{Mb}
And c >=3, c are integer；
S4, to McCompensate；
Airway pressure force value after setting compensation is Zc, calculate
After being compensated
Airway pressure force value Zc。
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| 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 |
| CN111265746B (en) * | 2020-01-20 | 2022-02-22 | 深圳市科曼医疗设备有限公司 | Hybrid chamber pressure control method, ventilator apparatus, 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 |
| 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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| CN101468223A (en) * | 2007-12-29 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Method for improving working accuracy of PEEP valve |
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| JP2007501074A (en) * | 2003-08-04 | 2007-01-25 | パルモネティック システムズ インコーポレイテッド | Portable ventilator system |
| CN103180002B (en) * | 2010-07-30 | 2016-10-19 | 瑞思迈有限公司 | Leakage detection method and equipment |
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|---|---|---|---|---|
| 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 |
| CN101468223A (en) * | 2007-12-29 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Method for improving working accuracy of PEEP valve |
Non-Patent Citations (1)
| Title |
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| 呼吸机测控系统的研究;郭军涛;《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》;20041215(第4期);正文第五章 * |
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