CN103893882B - A kind of anesthesia machine flow modification method and device - Google Patents
A kind of anesthesia machine flow modification method and device Download PDFInfo
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- CN103893882B CN103893882B CN201210589486.8A CN201210589486A CN103893882B CN 103893882 B CN103893882 B CN 103893882B CN 201210589486 A CN201210589486 A CN 201210589486A CN 103893882 B CN103893882 B CN 103893882B
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Abstract
The invention discloses a kind of anesthesia machine flow meter flow rate correction method and device, described method comprises: detect in real time and recording flowmeter flow value according to flow transducer, and the flow value according to record draws flow curve; Detect in real time according to pressure transducer and record the force value relevant to described flow value, the force value according to record draws pressure curve; Calculate the flex point of described pressure curve, obtain the flex point moment occurring described flex point; Flow curve section corresponding for predetermined amount of time before and after the described flex point moment is replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.The present invention can eliminate the effusion meter flow value periodical jumping because respiratory variations causes, and improves the accuracy of anesthesia machine flow meter flow detection.
Description
Technical field
The present invention relates to medical instruments field, particularly relate to a kind of anesthesia machine flow modification method and device.
Background technology
Electronic flowmeter is one of important component part of anesthetic machine, when carrying out the operations such as live gas compensation, proportioning oxygen concentration, leakage compensation at anesthetic machine, all needs to participate in calculating by the flow value of electronic flowmeter.Therefore, the effusion meter flow value of electronic flowmeter monitoring has very high requirement to the accuracy of detection of anesthetic machine and display precision.The usual use traffic sensor of electronic flowmeter flow detects flow value, and its detected value is directly related with show value.But, in use, the breathing cycle property change of the patient connected along with anesthetic machine, such as, in air-breathing latter stage, the pressure of air flue has sudden change, causes the display numerical value of flow transducer to occur saltus step thus, and now in fact the actual flow value of air flue remains unchanged, there is not the change that numerical value embodies.Thus, this periodicity detected value saltus step with respiratory variations of flow transducer can cause display inaccurate, and the tidal volume calculated accordingly also can be inaccurate.
Summary of the invention
The object of the invention is to propose a kind of anesthesia machine flow modification method and device, revise the flow value that in electronic flowmeter, flow transducer detects, eliminate the flow value periodical jumping because respiratory variations causes, improve the accuracy that anesthesia machine flow detects.
The invention discloses a kind of anesthesia machine flow modification method, comprising:
Detect in real time and recording flowmeter flow value according to flow transducer, the flow value according to record draws flow curve;
Detect in real time according to pressure transducer and record the force value relevant to described flow value, the force value according to record draws pressure curve;
Calculate the flex point of described pressure curve, obtain the flex point moment occurring described flex point;
Flow curve section corresponding for predetermined amount of time before and after the described flex point moment is replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus 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 corresponds to that air-breathing starts, air-breathing terminates and expiration end three time points.
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 force value.
The invention also discloses a kind of anesthesia machine flow correcting device, comprising:
Flow detection module, for detecting in real time according to flow transducer and recording flowmeter flow value, the flow value according to record draws flow curve;
Pressure detecting module, for detecting in real time according to pressure transducer and recording the force value relevant to described flow value, the force value according to record draws pressure curve;
Flex point computing module, for calculating the flex point of described pressure curve, obtains the flex point moment occurring described flex point;
Curve amendment module, for flow curve section corresponding for predetermined amount of time before and after the described flex point moment being replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.
Preferably, described device also comprises:
Display and computing module, for using 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 corresponds to that air-breathing starts, air-breathing terminates and expiration end three time points.
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 force value.
The present invention is by detecting simultaneously at the flow value of electronic flowmeter, the change of real-time detection related pressure, according to the flex point of the pressure curve calculated, obtains flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value revised.The flow value of described correction obtains according in front data fitting, and at front flow curve consecutive variations, thus, eliminates the flow value periodical jumping because respiratory variations causes, and improves the accuracy that anesthesia machine flow detects.
Accompanying drawing explanation
Fig. 1 is the flow chart of the anesthesia machine flow modification method of the embodiment of the present invention;
Fig. 2 is the structural representation of the anesthesia machine flow correcting device of the embodiment of the present invention.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Fig. 1 is the flow chart of the anesthesia machine flow modification method of the embodiment of the present invention.As shown in Figure 1, described method comprises:
Step 100, to detect in real time and recording flowmeter flow value according to flow transducer, the flow value according to record draws flow curve.
The gas flow of flow transducer to air flue of electronic flowmeter detects in real time, draws obtain the time dependent flow curve of reflection flow value according to the flow value recorded in chronological order.This curve is curve to be revised, and it is along with the change meeting of breathing is in the periodic discontinuous saltus step of switching device appearance of not sharing a common fate.
Step 200, detecting in real time and record the force value relevant to described flow value according to pressure transducer, the force value according to record draws pressure curve.
Pressure transducer is introduced the flow value correction of electronic flowmeter by the present embodiment.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 force value, and this force value is transferred to electronic flowmeter.Above-mentioned force value is all force value relevant with the flow that flow transducer is measured.
The controller of electronic flowmeter can calculate according to the force value of record and draw the time dependent pressure curve of reaction pressure force value.
Step 300, calculate the flex point of described pressure curve, obtain the flex point moment occurring described flex point.
Calculate flex point according to described pressure curve, flex point represents the reversing moment of airway pressure, can find that flex point produces when air-breathing starts by solving, at the end of air-breathing with expiration at the end of.The breathing of people can be divided into three phases, i.e. the section of holding one's breath, inspiratory limb and expiration section, and wherein the section of holding one's breath is the stage that people holds the breath between air-breathing and expiration, when at the end of holding one's breath, also namely air-breathing starts.At the switching instant of different respiration phase, airway pressure has a unexpected change, the flow generation saltus step that this can cause flow transducer to record.But in fact, very little owing to breathing the impact produced for air flue actual flow, air flue actual volume flow does not change because breathe to switch, and breathes the change switching and 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, then there will not be the problem of flow transducer numerical value saltus step.
Step 400, flow curve section corresponding for predetermined amount of time before and after the described flex point moment replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.
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 according to pressure curve flex point and detect flow value outlet jumping moment, also, the flex point moment, the flow detection value of predetermined amount of time before and after the flex point moment is replaced with modified flow rate value, thus removes inaccurate hop value in flow detection value.
And correction value can by obtaining the flow curve matching before flex point moment predetermined amount of time, the flow correction value obtained like this and preceding flow curve can form continually varying modified flow rate curve.
In a preferred implementation of the present embodiment, saltus step interval is less than 10 milliseconds usually, therefore, described predetermined amount of time is taken as 5 milliseconds, also, when revising, remove the flow detection value in each 5 milliseconds of time periods before and after the flex point time, replaced with flow correction value.
Step 500, 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.
Tidal volume (Tidalvolume, TV) refers to each tolerance sucking or breathe out under quiescent condition.Its for anesthetic machine carry out anaesthetize control Important Parameters.The present embodiment is undertaken showing and calculating by using the flow curve revised, can avoid electronic flowmeter in respiratory show value along with breathe frequency change, and the volumetric flow units giving Schema control one correct, do not affect the change of respiration detection parameter tidal volume.
It will be appreciated by those skilled in the art that the method for the present embodiment goes for sky oxygen, oxygen is laughed at, and sky is laughed at, and oxygen laughs at empty electronic flowmeter.
To sum up, the present embodiment the present invention is by the detection of electronic flowmeter flow value, the change of real-time detection related pressure, according to the flex point of the pressure curve calculated, obtain flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value revised.The flow value of described correction obtains according in front data fitting, and at front flow curve consecutive variations, thus, eliminates the flow value periodical jumping because respiratory variations causes, and improves the accuracy that anesthesia machine flow detects.
Fig. 2 is the structural representation of the anesthesia machine flow correcting device of the embodiment of the present invention.As shown in Figure 2, anesthesia machine flow correcting device comprises:
Flow detection module 21, for detecting in real time according to flow transducer and recording flowmeter flow value, the flow value according to record draws flow curve.
Pressure detecting module 22, for detecting in real time according to pressure transducer and recording the force value relevant to described flow value, the force value according to record draws pressure curve.
Wherein, the force value that described and described flow value is relevant comprises flow transducer rear end force value or airway pressure force value.
Flex point computing module 23, for calculating the flex point of described pressure curve, obtains the flex point moment occurring described flex point.
Curve amendment module 24, for flow curve section corresponding for predetermined amount of time before and after the described flex point moment being replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.
Display and computing module 25, for using 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.
Wherein, the described flex point moment corresponds to that air-breathing starts, air-breathing terminates and expiration end three time points.
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 the detection of electronic flowmeter flow value, the change of real-time detection related pressure, according to the flex point of the pressure curve calculated, obtain flow bound-time point, the flow value that flow sensor detects centered by this time point compensates, and obtains the flow value revised.The flow value of described correction obtains according in front data fitting, and at front flow curve consecutive variations, thus, eliminates the flow value periodical jumping because respiratory variations causes, and improves the accuracy that anesthesia machine flow detects.
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 network that multiple accountant forms, alternatively, they can realize with the executable program code of computer installation, thus they storages can be performed by accountant in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.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 change and change.All do within spirit of the present invention and principle any amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an anesthesia machine flow modification method, is characterized in that, comprising:
Detect in real time and recording flowmeter flow value according to flow transducer, the flow value according to record draws flow curve;
Detect in real time according to pressure transducer and record the force value relevant to described flow value, the force value according to record draws pressure curve;
Calculate the flex point of described pressure curve, obtain the flex point moment occurring described flex point;
Flow curve section corresponding for predetermined amount of time before and after the described flex point moment is replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.
2. anesthesia machine flow modification 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. anesthesia machine flow modification method according to claim 1, is characterized in that, the described flex point moment starts corresponding to air-breathing, air-breathing terminates and expiration end three time points.
4. anesthesia machine flow modification method according to claim 1, is characterized in that, described scheduled time segment length is 5 milliseconds.
5. anesthesia machine flow modification 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 force value.
6. an anesthesia machine flow correcting device, is characterized in that, comprising:
Flow detection module, for detecting in real time according to flow transducer and recording flowmeter flow value, the flow value according to record draws flow curve;
Pressure detecting module, for detecting in real time according to pressure transducer and recording the force value relevant to described flow value, the force value according to record draws pressure curve;
Flex point computing module, for calculating the flex point of described pressure curve, obtains the flex point moment occurring described flex point;
Curve amendment module, for flow curve section corresponding for predetermined amount of time before and after the described flex point moment being replaced with the alternative flow curve section obtained according to the flow curve matching before flex point moment predetermined amount of time, thus obtain continually varying modified flow rate curve.
7. anesthesia machine flow correcting device according to claim 6, is characterized in that, described device also comprises:
Display and computing module, for using 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.
8. anesthesia machine flow correcting device according to claim 6, is characterized in that, the described flex point moment starts corresponding to air-breathing, air-breathing terminates and expiration end three time points.
9. anesthesia machine flow correcting device according to claim 6, is characterized in that, described scheduled time segment length is 5 milliseconds.
10. anesthesia machine flow correcting 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 force value.
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| CN104771818B (en) * | 2015-03-02 | 2017-03-01 | 深圳市科曼医疗设备有限公司 | Per nasal pressure generator self-adapting calibration system and method |
| 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 |
| CN111917568B (en) * | 2020-05-19 | 2022-10-04 | 宁波大学 | Method for detecting mis-configuration of mobile internet network element equipment |
| CN112798738B (en) * | 2020-12-28 | 2023-06-13 | 汉威科技集团股份有限公司 | Construction method and concentration compensation method of response model based on sensor characteristic curve |
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| 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 |
| 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 |
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| WO2010046874A2 (en) * | 2008-10-24 | 2010-04-29 | Hospitech Respiration Ltd. | Method and system for ventilation |
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| 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 |
| 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 |
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