CN103893882A - Method and device for correcting anaesthesia-machine flow - Google Patents
Method and device for correcting anaesthesia-machine flow Download PDFInfo
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- CN103893882A CN103893882A CN201210589486.8A CN201210589486A CN103893882A CN 103893882 A CN103893882 A CN 103893882A CN 201210589486 A CN201210589486 A CN 201210589486A CN 103893882 A CN103893882 A CN 103893882A
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Abstract
The invention discloses a method and device for correcting anaesthesia-machine flow. The method includes the steps of detecting and recording flow meter flow values in real time through a flow sensor, drawing a flow curve according to the recorded flow values, detecting and recording pressure values related to the flow values in real time through a pressure sensor, drawing a pressure curve according to the recorded pressure values, calculating an inflection point of the pressure curve, obtaining the inflection point moment when the inflection point appears, replacing flow curve sections corresponding to a preset time period earlier than the inflection point moment and a preset time period later than the inflection point moment with replacement flow curve sections obtained in a fitted mode according to the flow curve section corresponding to the time period earlier than the preset time periods of the inflection point moment, and therefore obtaining a continuously-changed corrected flow curve. According to the method and device, flow meter flow value periodic jumping caused by breath changes can be eliminated, and the flow detection accuracy of a flow meter of an anaesthesia machine can be improved.
Description
Technical field
The present invention relates to medical instruments field, relate in particular to a kind of anesthetic machine flow rate correction method and device.
Background technology
Electronic flowmeter is one of important component part of anesthetic machine, while carrying out the operations such as live gas compensation, proportioning oxygen concentration, leakage compensation, all needs to participate in calculating by the flow value of electronic flowmeter at anesthetic machine.Therefore, accuracy of detection and the display precision of the effusion meter flow value of electronic flowmeter monitoring to anesthetic machine has very high requirement.The common use traffic sensor of electronic flowmeter flow detects flow value, and its detected value is directly related with show value.But, in use, along with anesthetic machine connect patient breathing cycle property change, for example, in air-breathing latter stage, the pressure of air flue has sudden change, causes thus the demonstration numerical value of flow transducer to occur saltus step, and now in fact the actual flow value of air flue remains unchanged, there is not the variation that numerical value embodies.Thus, this periodicity detected value saltus step meeting with respiratory variations of flow transducer causes showing inaccurate, and the tidal volume of calculating accordingly also can be inaccurate.
Summary of the invention
The object of the invention is to propose a kind of anesthetic machine flow rate correction method and device, revise the flow value that in electronic flowmeter, flow transducer detects, eliminate the flow value periodical jumping causing due to respiratory variations, improve the accuracy of anesthetic machine flow detection.
The invention discloses a kind of anesthetic machine flow rate correction method, comprising:
Detect in real time and recording flowmeter flow value according to flow transducer, draw flow curve according to the flow value of record;
According to the real-time detection of pressure transducer the record force value relevant to described flow value, draw pressure curve according to the force value of record;
Calculate the flex point of described pressure curve, obtain the flex point moment that occurs described flex point;
Flow curve section corresponding to predetermined amount of time before and after the described flex point moment replaced with to the alternative flow curve section obtaining according to the flow curve matching before flex point moment predetermined amount of time, thereby obtain continually varying modified flow rate curve.
Preferably, described method also comprises:
Use the value of described modified flow rate curve to do show value, and carry out the calculating of tidal volume according to described modified flow rate curve.
Preferably, the described flex point moment is corresponding to air-breathing beginning, air-breathing end and three time points of end of exhaling.
Preferably, described predetermined amount of time is 5 milliseconds.
Preferably, the force value that described and described flow value is relevant is flow transducer rear end force value or airway pressure value.
The invention also discloses a kind of anesthetic machine flow correction device, comprising:
Flow detection module, for detecting in real time and recording flowmeter flow value according to flow transducer, draws flow curve according to the flow value of record;
Pressure detecting module, for according to the real-time detection of pressure transducer the record force value relevant to described flow value, draws pressure curve according to the force value of record;
Flex point computing module, for calculating the flex point of described pressure curve, obtains the flex point moment that occurs described flex point;
Curve correcting module, for flow curve section corresponding to predetermined amount of time before and after the described flex point moment replaced with to the alternative flow curve section obtaining according to the flow curve matching before flex point moment predetermined amount of time, thereby obtain continually varying modified flow rate curve.
Preferably, described device also comprises:
Show and computing module, do show value for the value that uses described modified flow rate curve, and carry out the calculating of tidal volume according to described modified flow rate curve.
Preferably, the described flex point moment is corresponding to air-breathing beginning, air-breathing end and three time points of end of exhaling.
Preferably, described predetermined amount of time is 5 milliseconds.
Preferably, the force value that described and described flow value is relevant is flow transducer rear end force value or airway pressure value.
The present invention detects simultaneously by the flow value at electronic flowmeter, detect in real time the variation of related pressure, according to the flex point of the pressure curve calculating, obtain flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value of revising.The flow value of described correction is according to obtaining in front data fitting, and changes continuously at front flow curve, thus, eliminated the flow value periodical jumping causing due to respiratory variations, improves the accuracy of anesthetic machine flow detection.
Brief description of the drawings
Fig. 1 is the flow chart of the anesthetic machine flow rate correction method of the embodiment of the present invention;
Fig. 2 is the structural representation of the anesthetic machine flow correction device of the embodiment of the present invention.
Detailed description of the invention
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by detailed description of the invention.
Fig. 1 is the flow chart of the anesthetic machine flow rate correction method of the embodiment of the present invention.As shown in Figure 1, described method comprises:
The flow transducer of electronic flowmeter detects in real time to the gas flow of air flue, draws and obtains reflecting the time dependent flow curve of flow value according to the flow value recording in chronological order.This curve is curve to be revised, and it is along with the variation meeting of breathing occurs periodic discontinuous saltus step at the switching device of not sharing a common fate.
The present embodiment is introduced pressure transducer the flow value correction of electronic flowmeter.Pressure transducer can directly be integrated on electronic flowmeter, detects the rear end force value of flow transducer.Also can not set up pressure transducer, utilize airway pressure sensor to detect airway pressure value, and this force value is transferred to electronic flowmeter.Above-mentioned force value is all relevant force value of flow of measuring with flow transducer.
The controller of electronic flowmeter can calculate and draw reaction pressure according to the force value of record and be worth time dependent pressure curve.
Calculate flex point according to described pressure curve, flex point represents the reversion moment of airway pressure, can find that by solving flex point is created in air-breathing beginning time, while end with expiration when air-breathing end.People's breathing can be divided into three phases, i.e. the section of holding one's breath, air-breathing section and the section of exhaling, wherein the section of holding one's breath be people air-breathing and exhale between stage of holding the breath, while holding one's breath end also when air-breathing beginning.At the switching instant of different respiration phase, airway pressure has a unexpected variation, the flow generation saltus step that this can cause flow transducer to record.But in fact,, because the impact that breathing produces for air flue actual flow is very little, air flue actual volume flow, because breathing switching changes, is not breathed and is switched the variation that also can not have influence on expiration detected parameters tidal volume.And holding one's breath, in air-breathing and exhalation process because pressure is comparatively stable, there will not be the problem of flow transducer numerical value saltus step.
Known according to analysis above, flow transducer there will be detected value saltus step at breathing different phase switching instant, and actual volume flow does not change, thus, obtain and detect flow value outlet jumping moment according to pressure curve flex point, also, the flex point moment, the flow detection value of predetermined amount of time before and after the flex point moment is replaced with to modified flow rate value, thereby remove inaccurate hop value in flow detection value.
And correction value can obtain by the flow curve matching to before flex point moment predetermined amount of time, the flow correction value and the preceding flow curve that obtain like this can form continually varying modified flow rate curve.
In a preferred implementation of the present embodiment, saltus step interval is less than 10 milliseconds conventionally, therefore, described predetermined amount of time is taken as to 5 milliseconds, also, in the time revising, remove the flow detection value in flex point time each 5 milliseconds of time periods of front and back, replaced with flow correction value.
Tidal volume (Tidal volume, TV) refers to each tolerance that sucks or breathe out under quiescent condition.Its for anesthetic machine anaesthetize control Important Parameters.The flow curve that the present embodiment is revised by use shows and calculates, can avoid electronic flowmeter in respiratory show value along with breathe frequency change, and to correct volume flow value of pattern control, do not affect the variation of respiration detection parameter tidal volume.
The method that it will be appreciated by those skilled in the art that the present embodiment goes for sky oxygen, and oxygen is laughed at, and sky is laughed at, and oxygen is laughed at empty electronic flowmeter.
To sum up, the present embodiment the present invention is by electronic flowmeter flow value detects, detect in real time the variation of related pressure, according to the flex point of the pressure curve calculating, obtain flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value of revising.The flow value of described correction is according to obtaining in front data fitting, and changes continuously at front flow curve, thus, eliminated the flow value periodical jumping causing due to respiratory variations, improves the accuracy of anesthetic machine flow detection.
Fig. 2 is the structural representation of the anesthetic machine flow correction device of the embodiment of the present invention.As shown in Figure 2, anesthetic machine flow correction device comprises:
Pressure detecting module 22, for according to the real-time detection of pressure transducer the record force value relevant to described flow value, draws pressure curve according to the force value of record.
Wherein, the relevant force value of described and described flow value comprises flow transducer rear end force value or airway pressure value.
Flex point computing module 23, for calculating the flex point of described pressure curve, obtains the flex point moment that occurs described flex point.
Show and computing module 25, do show value for the value that uses described modified flow rate curve, and carry out the calculating of tidal volume according to described modified flow rate curve.
Wherein, the described flex point moment is corresponding to air-breathing beginning, air-breathing end and three time points of end of exhaling.
And in a preferred embodiment of the invention, described predetermined amount of time is taken as 5 milliseconds.
The present embodiment the present invention is by electronic flowmeter flow value detects, detect in real time the variation of related pressure, according to the flex point of the pressure curve calculating, obtain flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value of revising.The flow value of described correction is according to obtaining in front data fitting, and changes continuously at front flow curve, thus, eliminated the flow value periodical jumping causing due to respiratory variations, improves the accuracy of anesthetic machine flow detection.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general accountant, they can concentrate on single accountant, or be distributed on the network that multiple accountants form, alternatively, they can realize with the executable program code of computer installation, thereby they can be stored in storage device and be carried out by accountant, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to the combination of any specific hardware and software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any amendments of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (10)
1. an anesthetic machine flow rate correction method, comprising:
Detect in real time and recording flowmeter flow value according to flow transducer, draw flow curve according to the flow value of record;
According to the real-time detection of pressure transducer the record force value relevant to described flow value, draw pressure curve according to the force value of record;
Calculate the flex point of described pressure curve, obtain the flex point moment that occurs described flex point;
Flow curve section corresponding to predetermined amount of time before and after the described flex point moment replaced with to the alternative flow curve section obtaining according to the flow curve matching before flex point moment predetermined amount of time, thereby obtain continually varying modified flow rate curve.
2. anesthetic machine flow rate correction method according to claim 1, is characterized in that, described method also comprises:
Use the value of described modified flow rate curve to do show value, and carry out the calculating of tidal volume according to described modified flow rate curve.
3. anesthetic machine flow rate correction method according to claim 1, is characterized in that, the described flex point moment is corresponding to air-breathing beginning, air-breathing end and three time points of end of exhaling.
4. anesthetic machine flow rate correction method according to claim 1, is characterized in that, described scheduled time segment length is 5 milliseconds.
5. anesthetic machine flow rate correction method according to claim 1, is characterized in that, the described force value relevant to flow value is flow transducer rear end force value or airway pressure value.
6. an anesthetic machine flow correction device, comprising:
Flow detection module, for detecting in real time and recording flowmeter flow value according to flow transducer, draws flow curve according to the flow value of record;
Pressure detecting module, for according to the real-time detection of pressure transducer the record force value relevant to described flow value, draws pressure curve according to the force value of record;
Flex point computing module, for calculating the flex point of described pressure curve, obtains the flex point moment that occurs described flex point;
Curve correcting module, for flow curve section corresponding to predetermined amount of time before and after the described flex point moment replaced with to the alternative flow curve section obtaining according to the flow curve matching before flex point moment predetermined amount of time, thereby obtain continually varying modified flow rate curve.
7. anesthetic machine flow correction device according to claim 6, is characterized in that, described device also comprises:
Show and computing module, do show value for the value that uses described modified flow rate curve, and carry out the calculating of tidal volume according to described modified flow rate curve.
8. anesthetic machine flow correction device according to claim 6, is characterized in that, the described flex point moment is corresponding to air-breathing beginning, air-breathing end and three time points of end of exhaling.
9. anesthetic machine flow correction device according to claim 6, is characterized in that, described scheduled time segment length is 5 milliseconds.
10. anesthetic machine flow correction device according to claim 6, is characterized in that, the described force value relevant to flow value is flow transducer rear end force value or airway pressure value.
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| CN201210589486.8A CN103893882B (en) | 2012-12-28 | 2012-12-28 | A kind of anesthesia machine flow modification method and device |
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| CN201210589486.8A CN103893882B (en) | 2012-12-28 | 2012-12-28 | A kind of anesthesia machine flow modification method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104771818A (en) * | 2015-03-02 | 2015-07-15 | 深圳市科曼医疗设备有限公司 | Self-adaptation calibration system and method for passing-nose pressure generator |
| CN106932056A (en) * | 2015-12-29 | 2017-07-07 | 北京谊安医疗系统股份有限公司 | A kind of Calibration Method of flow transducer of anesthesia apparatus |
| CN111917568A (en) * | 2020-05-19 | 2020-11-10 | 宁波大学 | Method for detecting mis-configuration of mobile internet network element equipment |
| CN112798738A (en) * | 2020-12-28 | 2021-05-14 | 汉威科技集团股份有限公司 | Response model based on sensor characteristic curve and concentration compensation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310788A (en) * | 2007-05-25 | 2008-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia apparatus and calibration method of suction valve thereof |
| US20110197888A1 (en) * | 2008-10-24 | 2011-08-18 | Hospitech Respiration Ltd. Matalon Center Building Wing-A 3rd floor | Method and system for ventilation |
| CN102397613A (en) * | 2010-09-07 | 2012-04-04 | 北京航天长峰股份有限公司 | Method for controlling pressure of anesthesia machine and breathing machine pressure control by using expiration flow sensor |
-
2012
- 2012-12-28 CN CN201210589486.8A patent/CN103893882B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310788A (en) * | 2007-05-25 | 2008-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia apparatus and calibration method of suction valve thereof |
| US20110197888A1 (en) * | 2008-10-24 | 2011-08-18 | Hospitech Respiration Ltd. Matalon Center Building Wing-A 3rd floor | Method and system for ventilation |
| CN102397613A (en) * | 2010-09-07 | 2012-04-04 | 北京航天长峰股份有限公司 | Method for controlling pressure of anesthesia machine and breathing machine pressure control by using expiration flow sensor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104771818A (en) * | 2015-03-02 | 2015-07-15 | 深圳市科曼医疗设备有限公司 | Self-adaptation calibration system and method for passing-nose pressure generator |
| CN106932056A (en) * | 2015-12-29 | 2017-07-07 | 北京谊安医疗系统股份有限公司 | A kind of Calibration Method of flow transducer of anesthesia apparatus |
| CN111917568A (en) * | 2020-05-19 | 2020-11-10 | 宁波大学 | Method for detecting mis-configuration of mobile internet network element equipment |
| CN111917568B (en) * | 2020-05-19 | 2022-10-04 | 宁波大学 | Method for detecting mis-configuration of mobile internet network element equipment |
| CN112798738A (en) * | 2020-12-28 | 2021-05-14 | 汉威科技集团股份有限公司 | Response model based on sensor characteristic curve and concentration compensation method |
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| CN103893882B (en) | 2016-03-02 |
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