CN101468223A - Method for improving working accuracy of PEEP valve - Google Patents
Method for improving working accuracy of PEEP valve Download PDFInfo
- Publication number
- CN101468223A CN101468223A CNA2007103083237A CN200710308323A CN101468223A CN 101468223 A CN101468223 A CN 101468223A CN A2007103083237 A CNA2007103083237 A CN A2007103083237A CN 200710308323 A CN200710308323 A CN 200710308323A CN 101468223 A CN101468223 A CN 101468223A
- Authority
- CN
- China
- Prior art keywords
- value
- peep valve
- airway pressure
- processing unit
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention provides a method for increasing the working precision of PEEP valve for settling the problem that the PEEP valve can not obtain high working precision, wherein the method comprises the following steps: inputting anticipated pressure value P1 into a processing unit (1) which obtains a corresponding current value I1 according to the stored comparison table and controls the PEEP valve (3) with the current value I1 to open the PEEP valve to a certain opening by an operator; detecting the airway pressure in the exhalation branch line by a pressure sensor (5) at the end of exhalation period and conveying the airway pressure value P2 to the processing unit (1); calculating a deviation value deltaP=P2-P1 by the processing unit (1) for determining whether the deviation value deltaP is in the anticipated control area, if not, obtaining an adjustment value P1' according to the relationship P1'=P1+deltaP*K, and in the relationship the adjusted scaling factor K is controlled between 0.4 to 0.9; and executing the steps repeatedly according to adjustment value until the deviation value is in the anticipated control area. The method can quickly and accurately increase the working precision of PEEP.
Description
Technical field
The present invention relates to how more effectively use PEEP valve (Positive End-ExpiratoryPressure, positive end expiratory pressure device), promptly how to improve its operating accuracy.
Background technology
The PEEP valve is mainly used in anesthetic machine and the respirator, and being beneficial to pulmonary has the patient of pathological changes to carry out respiratory ventilation.The operation principle of PEEP valve is by regulating the size of electric current, controlling diaphragm-operated opening pressure.The advantage of this valve is that the linearity is relatively good.Current common using method is at first by test, to calibrate the diaphragm-operated opening pressure of each current point correspondence, the correspondence table of acquisition pressure and electric current.The pressure that obtains according to expectation is tabled look-up and is found corresponding current value then, obtains the PEEP pressure of expectation by given electric current.
The shortcoming of said method is that the PEEP valve can't reach very high operating accuracy.Because obtain very high operating accuracy, then must obtain the meticulousr pressure and the correspondence table of electric current, this needs a large amount of loaded down with trivial details tests.Also need very big memory space and will store this meticulous tabular value.Quote this meticulous tabular value simultaneously and calculate, also need a large amount of system times and resource.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of method of operating accuracy of the PEEP of raising valve is provided, and improving its operating accuracy greatly, thereby guarantees the accuracy and the safety of equipment in the venting process (as anesthetic machine and respirator etc.) in easy mode.
For addressing the above problem, basic ideas of the present invention are to use the method for closed loop control, by coming the calculation deviation value in each detected airway pressure value in exhalation cycle end.When described deviate is not in desired span of control, calculate adjusted value according to adjusting formula.Circulation is adjusted according to adjusted value, till the data that record reach the desired control precision.
According to a kind of form of implementation of the present invention, a kind of method of operating accuracy of the PEEP of raising valve is provided, comprise the following steps:
Step 1 provides the end-tidal airway pressure value P of expection
1
The aperture of valve;
If step 4 is P
1Greater than P
2, reduce the aperture of described PEEP valve, if P
1Less than P
2, increase the aperture of described PEEP valve;
Repeating said steps 2 is to step 4, up to the end-tidal airway pressure value P that obtains described expection
1
Preferably, in described step 1, also provide the permissible range of end-tidal airway pressure value; In described step 4, if P
1Greater than P
2Surpass described permissible range, reduce the aperture of described PEEP valve, if P
1Less than P
2Surpass described permissible range, increase the aperture of described PEEP valve.
According to the present invention, a kind of method of operating accuracy of the PEEP of raising valve is provided, comprise the following steps:
-operator is with the pressure value P of expection
1Be input in the processing unit, described processing unit draws corresponding current value I according to the synopsis of being stored
1And utilize this current value I
1Control PEEP valve makes it be opened to certain aperture;
-at the exhalation cycle end, by the airway pressure in the pressure transducer detection expiration branch road and with this airway pressure value P
2Flow to described processing unit;
-by described processing unit calculation deviation value Δ P=P
2-P
1, judge that this deviate Δ P is whether in desired span of control, if do not exist, then according to P
1'=P
1+ Δ P * K obtains adjusted value P
1', wherein the scale factor K of control adjustment is between 0.4 to 0.9;
-carry out above-mentioned steps according to adjusted value circulation, until deviate in desired span of control.
Preferably, the scale factor K of described control adjustment is between 0.4 to 0.7.
More preferably, the scale factor K of described control adjustment is 0.7.
The beneficial effect of this technical scheme:
Improve precision by closed loop control.In control, monitor the end-tidal airway pressure value of PEEP valve control in real time, and with it as feedback, constantly calculate and adjust the PEEP valve, make the output of PEEP valve reach higher precision.This method can be applicable in monitoring and diagnostic device, especially anesthetic machine in the medical diagnosis and the respirator control to the PEEP valve.
Use closed loop control, according to data monitored after each breathing cycle, readjust the control of PEEP valve, the control accuracy of the raising PEEP valve that this method can be very big.In addition,, simplified the calibration process of PEEP valve, reduced the memory space of tabular value, also reduced computation time because still use the correspondence table of simple pressure and electric current.
Description of drawings
Accompanying drawing constitutes the part of this description, is used to help further understand the present invention.This accompanying drawing illustrates a concrete embodiment who uses of the present invention, and is used for illustrating principle of the present invention with description.Identical in the accompanying drawings parts are represented with identical label.Wherein:
Fig. 1 represents the concrete embodiment that uses of method according to the operating accuracy of raising PEEP valve of the present invention.
The specific embodiment
With reference to the accompanying drawings, concrete real-time mode of the present invention is elaborated.
Realize that the applied equipment of method of the present invention comprises: processing unit 1, air-channel system, data acquisition receiving system, be controlled by the PEEP valve and the driver element of the microprocessor of processing unit 1; Air-channel system comprises breathing circuit 6, and connects the pipeline of drive-side of this breathing circuit and the breathing pipeline of patient end 4 sides respectively; The distolateral breathing pipeline of described patient comprises air-breathing branch road and expiration branch road; Be connected to the PEEP valve 3 that the outside aerofluxus of inlet valve 2 and breathing circuit is used in the pipeline of drive-side, this PEEP valve 3 is used for driving gas is discharged to atmosphere; Gather the pick off of the force value at exhalation cycle end, comprise the airway pressure pick off 5 that places air flue, gather the force value in the air flue at exhalation cycle end and send it to processing unit 1 by it, processing unit 1 judges whether to proceed the continuation adjustment of PEEP valve 3.These equipment are generally anesthetic machine and respirator.
The work process of implementing the method according to this invention generally is such, promptly in intake period, PEEP valve 3 controlled closing, inlet valve 2 is subject to processing unit 1 control and is opened to the setting flow velocity, driving gas enters the exocoel of the bellows in the breathing circuit 6 by inlet valve 2, air bag in the compression bellows moves downward, and makes the interior gas of capsule flow into patient end 4 via air-breathing branch road, makes patient suck gas.Judge inspiratory cycle when processing unit 1 and finish that when exhalation cycle began, processing unit 1 was by the pressure value P of the expection of operator's input
1Inquiry synopsis (this synopsis provides when valve dispatches from the factory) draws and drives PEEP valve 3 needed current value I
1Make it reach certain aperture, this moment, inlet valve was controlled closes, and gas is got back to the folded airbag inside of bellows in the breathing circuit 6 by patient end through the expiration branch road, promoted air bag and rose the outer driving gas of bellows is discharged to the atmosphere via PEEP valve 3 from the respirator end.At the exhalation cycle end, when promptly exhalation cycle closes to an end, detect the interior airway pressure value P of expiration branch road with pressure transducer 5
2, send processing unit 1 to.Processing unit 1 is by calculating Δ P=P
2-P
1, judge whether the value of Δ P drops in the span of control of expectation, if do not exist, then by formula P
1'=P
1+ Δ P * K obtains adjusted value P
1', K is the scale factor that control is adjusted; According to adjusted value P
1' circulate and carry out above-mentioned steps, reach needed operating accuracy up to the PEEP valve.
Here, the K value be in experiment through testing obtained optimal value repeatedly, the K value need make the PEEP valve reach the force value requirement in five breathing cycles, so the K value can not be too little.But the K value can not be too big, is in course of adjustment if the K value is excessive to make force value produce bigger vibration, therefore need find out the ideal value of a compromise in experiment.At different systems and type, the ideal value that K obtains can be different, it is as shown in the table that the AS3000 type of producing with applicant company carries out the result that K value tests, by in the table as can be seen in such cases, satisfying " reaching the required cycle of desired value is 5 and following " and the best value of " respiratory waveform nonoscillatory " two conditions simultaneously is 0.7.
| The K value | Reach the needed cycle of desired value | Whether vibrate |
| 0.4 | 10 | Not |
| 0.5 | 8 | Not |
| 0.6 | 6 | Not |
| 0.7 | 4-5 | Be not |
| 0.8 | 4 | Be |
| 0.9 | 2 | Be |
AS3000 type K value test result
At different systems and type, the span of K is between 0.4-0.9, and concrete value should be recorded by experimental result.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a method that improves the operating accuracy of PEEP valve is characterized in that, comprises the following steps:
Step 1 provides the end-tidal airway pressure value P of expection
1
Step 2 is according to the end-tidal airway pressure value P of described expection
1Control the aperture of described PEEP valve (3);
Step 3 detects actual end-tidal airway pressure value P
2
If step 4 is P
1Greater than P
2, reduce the aperture of described PEEP valve (3), if P
1Less than P
2, increase the aperture of described PEEP valve (3);
Repeating said steps 2 is to step 4, up to the end-tidal airway pressure value P that obtains described expection
1
2. the method for the operating accuracy of raising PEEP valve according to claim 1 is characterized in that:
In described step 1, also provide the permissible range of end-tidal airway pressure value;
In described step 4, if P
1Greater than P
2Surpass described permissible range, reduce the aperture of described PEEP valve (3), if P
1Less than P
2Surpass described permissible range, increase the aperture of described PEEP valve (3).
3. a method that improves the operating accuracy of PEEP valve comprises the following steps:
-operator is with the pressure value P of expection
1Be input in the processing unit (1), described processing unit (1) draws corresponding current value I according to the synopsis of being stored
1And utilize this current value I
1Control PEEP valve (3) makes it be opened to certain aperture;
-at the exhalation cycle end, by the airway pressure in pressure transducer (5) the detection expiration branch road and with this airway pressure value P
2Flow to described processing unit (1);
-by described processing unit (1) calculation deviation value Δ P=P
2-P
1, judge that this deviate Δ P is whether in desired span of control, if do not exist, then according to P
1'=P
1+ Δ P * K obtains adjusted value P
1', wherein the scale factor K of control adjustment is between 0.4 to 0.9;
-carry out above-mentioned steps according to adjusted value circulation, until deviate in desired span of control.
4. method according to claim 3 is characterized in that, the scale factor K that described control is adjusted is between 0.4 to 0.7.
5. method according to claim 4 is characterized in that, the scale factor K of described control adjustment is 0.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103083237A CN101468223B (en) | 2007-12-29 | 2007-12-29 | Method for improving working accuracy of PEEP valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103083237A CN101468223B (en) | 2007-12-29 | 2007-12-29 | Method for improving working accuracy of PEEP valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101468223A true CN101468223A (en) | 2009-07-01 |
| CN101468223B CN101468223B (en) | 2012-04-11 |
Family
ID=40826183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007103083237A Expired - Fee Related CN101468223B (en) | 2007-12-29 | 2007-12-29 | Method for improving working accuracy of PEEP valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101468223B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266631A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Method and device for inspecting PEEP (positive end expiratory pressure) valve |
| CN102028996B (en) * | 2009-09-30 | 2012-09-05 | 北京谊安医疗系统股份有限公司 | Method and device for regulating output pressure of respirator decompressor |
| CN103908725A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Electric control breathing machine or anesthesia machine proportional valve based automatic calibration method |
| CN103908726A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Electric control breathing machine or anesthesia machine active exhalation valve based automatic calibration method |
| CN104001249A (en) * | 2014-06-13 | 2014-08-27 | 北京易世恒电子技术有限责任公司 | Method and device for controlling positive end expiratory pressure |
| CN104874083A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | PEEP valve verification method |
| CN105194776A (en) * | 2015-08-28 | 2015-12-30 | 重庆工商职业学院 | Method for controlling air passage pressure of breathing machine |
| CN109939313A (en) * | 2017-12-20 | 2019-06-28 | 北京谊安医疗系统股份有限公司 | PEEP valve, the control method of PEEP valve and the ventilator containing the PEEP valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5651360A (en) * | 1996-03-29 | 1997-07-29 | Ohmeda Inc. | Peep control for bellows ventilator |
| CN2290351Y (en) * | 1997-03-25 | 1998-09-09 | 李华军 | Portable respirator |
| WO2003008027A1 (en) * | 2001-07-19 | 2003-01-30 | Resmed Ltd. | Pressure support ventilation of patients |
-
2007
- 2007-12-29 CN CN2007103083237A patent/CN101468223B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102028996B (en) * | 2009-09-30 | 2012-09-05 | 北京谊安医疗系统股份有限公司 | Method and device for regulating output pressure of respirator decompressor |
| CN102266631A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Method and device for inspecting PEEP (positive end expiratory pressure) valve |
| WO2012089084A1 (en) * | 2010-12-31 | 2012-07-05 | 北京谊安医疗系统股份有限公司 | Method and device for calibrating peep valve |
| CN103908725A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Electric control breathing machine or anesthesia machine proportional valve based automatic calibration method |
| CN103908726A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Electric control breathing machine or anesthesia machine active exhalation valve based automatic calibration method |
| CN104874083A (en) * | 2014-02-28 | 2015-09-02 | 北京谊安医疗系统股份有限公司 | PEEP valve verification method |
| CN104001249A (en) * | 2014-06-13 | 2014-08-27 | 北京易世恒电子技术有限责任公司 | Method and device for controlling positive end expiratory pressure |
| CN104001249B (en) * | 2014-06-13 | 2016-06-15 | 北京易世恒电子技术有限责任公司 | Breathe control method and the device of last malleation |
| CN105194776A (en) * | 2015-08-28 | 2015-12-30 | 重庆工商职业学院 | Method for controlling air passage pressure of breathing machine |
| CN105194776B (en) * | 2015-08-28 | 2017-12-26 | 重庆工商职业学院 | A kind of lung ventilator air flue compress control method |
| CN109939313A (en) * | 2017-12-20 | 2019-06-28 | 北京谊安医疗系统股份有限公司 | PEEP valve, the control method of PEEP valve and the ventilator containing the PEEP valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101468223B (en) | 2012-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101468223B (en) | Method for improving working accuracy of PEEP valve | |
| US8066003B2 (en) | Method for improving control and detection precision of tidal volume by a calculation introduced with R value | |
| JP5995942B2 (en) | Ventilator leak compensation | |
| US8776791B2 (en) | Respirator and method for calibrating flow rate measuring component thereof | |
| CN101337101B (en) | Aerating system of anesthesia apparatus and respirator and pressure monitoring method | |
| CN101310788B (en) | Anesthesia apparatus and calibration method of suction valve thereof | |
| CN102164540B (en) | Model-predictive online identification of patient respiratory effort dynamics in medical ventilators | |
| CN103893865B (en) | A kind of method of lung ventilator turbine volume controlled ventilation | |
| US10898671B2 (en) | Method and device for the adaptive regulation of a positive end-expiratory pressure (PEEP) | |
| US6651657B1 (en) | Respirator for different forms of respiration | |
| US11650199B2 (en) | System and method for controlling a flow through a pneumatic system | |
| CN103893864A (en) | Turbine respirator pressure control ventilation method | |
| CN104936644A (en) | System and method for controlling airway gas parameters during high frequency positive pressure ventilation | |
| WO2012089084A1 (en) | Method and device for calibrating peep valve | |
| US10682489B2 (en) | Turbine ventilator system and method | |
| CN101468219A (en) | Gas path system and operation method thereof as well as breathing apparatus and anesthesia apparatus using the system | |
| JP6908583B2 (en) | Methods and systems for estimating patient airway flow and leak flow for non-invasive ventilation | |
| AU2006303816A1 (en) | Method and apparatus for improving flow and pressure estimation in CPAP systems | |
| CN105194776B (en) | A kind of lung ventilator air flue compress control method | |
| CN102397609A (en) | Ventilation method for ensuring volume and limiting pressure of anesthesia machine and breathing machine | |
| CN100518637C (en) | Method and apparatus for monitoring human breathing mechanics parameters based on differential pressure flow sensor | |
| US8707951B2 (en) | Process for operating a respirator | |
| CN103893881B (en) | The flow control methods of a kind of flow valve and device | |
| CN101318048B (en) | Automatic correction method for reverse connection of flow transducer of anesthesia apparatus and anesthesia apparatus thereof | |
| CN104069574A (en) | Method and device for controlling turbines in order to control output pressures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20141229 |
|
| EXPY | Termination of patent right or utility model |