CN104075857A - Method for detecting leakage of anaesthesia machine or breathing machine - Google Patents
Method for detecting leakage of anaesthesia machine or breathing machine Download PDFInfo
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- CN104075857A CN104075857A CN201310109021.2A CN201310109021A CN104075857A CN 104075857 A CN104075857 A CN 104075857A CN 201310109021 A CN201310109021 A CN 201310109021A CN 104075857 A CN104075857 A CN 104075857A
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Abstract
The invention discloses a method for detecting the leakage of an anaesthesia machine or a breathing machine comprises the steps that S00, a leakage detection mode is started; S10, an inhalation valve is opened, an exhalation valve is closed, and an air channel is filled with air; S20, the pressure in the air channel is detected; S30, whether the current pressure in the air channel reaches a first preset value is judged, if not, the step S10 is executed, and if yes, the step S40 is executed; S40, a machine is controlled to close the inhalation valve, the value of pressure in the air channel at the moment is obtained to serve as a first pressure P1, and a timer is started; 50, the value of the pressure and the time keeping time are obtained in real time, whether the value of the pressure in the air channel at the moment is lower than a preset second target pressure value is judged or whether the time keeping time exceeds a preset time is judged, and the step S60 is executed if any of the two conditions is met; S60, the value of the current pressure and the time keeping time are obtained, and the value of the current pressure is taken as a second pressure P2; S70, the leakage of the system is calculated.
Description
Technical field
The present invention relates to field of medical, more specifically, relate to a kind of Anesthesia machine or lung ventilator leakage rate detection method.
Background technology
Anesthesia machine or lung ventilator etc. for traditional amount of leakage detection method of the Medical Devices of assisted respiartion are, first provide and maintain flow by compressed air source unit, adjust this flow and make the constant 30cmH20 of being of airway pressure energy, now maintain the size of gas flow by special apparatus measures, this flow is leakage rate.
Medical Devices practical application at Anesthesia machine or lung ventilator etc. for assisted respiartion, for support equipment is normally worked, conventionally each device power all needs to carry out basic leak detection, now traditional detection method is just difficult to meet the demand of practical application, therefore most equipment adopts by self providing pressure to maintain gas flow, and maintenance air passage pressure reaches specific objective (being generally 30cmH20), measure that flow now determines.
But, due to the reason of equipment itself, quantity of gas leakage is less than 1000ml/min conventionally, and the flow sensor precision that Anesthesia machine or lung ventilator carry itself is difficult to measure so little gas flow, this just causes final leakage test to have very large deviation, if use high-precision flow sensor, certainly will increase the cost of great number.
Adding the reason of equipment itself, is maintenance air passage pressure, certainly will require a control valve that the flow of response is provided, and because this flow is very little, this flowrate control valve is also had to high requirement, and cost is high.Therefore can only be, that high-end devices just can provide this type of detectability and ensure precision.
Based on foregoing description, need badly and want the simpler measuring method of one, avoid using high-precision flow sensor and flowrate control valve, to reach the cost object that greatly reduces equipment.
Summary of the invention
For solving the above problem, the object of the present invention is to provide a kind of Anesthesia machine or lung ventilator leakage rate detection side, this detection method can avoid using high-precision flow sensor and flowrate control valve, can greatly reduce the cost of equipment, and this measuring method is simpler.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of Anesthesia machine or lung ventilator leakage rate detection method, comprise the following steps:
Step S00, Anesthesia machine or lung ventilator enter leakage rate detecting pattern;
Described in step S10, control module control, Anesthesia machine or lung ventilator are opened inlet valve and are closed outlet valve, inflate to described Anesthesia machine or lung ventilator air flue by inlet valve;
Step S20, described control module controlled pressure sensor detect intra-airway pressure, and Real-time Obtaining force value;
Step S30, judging unit judge that whether described air flue current pressure value reaches the first goal-selling force value, if do not reached, performs step S10; If reached, perform step S40;
Step S40, described control module control Anesthesia machine or lung ventilator are closed inlet valve, obtain the force value of air flue described in current time as the first pressure P 1 simultaneously, and start timer;
Pressure transducer and described timer described in step S50, described control module control, and Real-time Obtaining force value and timing time, described judging unit judges whether whether current pressure value exceed Preset Time lower than default the second goal-selling force value or timing time, if meet any one in two conditions, execution step S60;
Step S60, described control module obtain current pressure value and timing time T, and using current force value as the second pressure P 2;
Step S70, described control module are opened described outlet valve, and data processing unit calculates described Anesthesia machine or respirator system amount of leakage.
As preferably, in step S50, comprise the following steps:
Described in step S51, described control module control, pressure transducer detects the pressure in air flue, controls described timer timing simultaneously, and Real-time Obtaining force value and timing time;
Whether the timing time of step S52, monitoring timer exceedes setting-up time, if exceeded, performs step S60, otherwise, execution step S53;
Whether the current pressure value of step S53, monitoring pressure sensor lower than the second goal-selling force value, if lower than the second goal-selling force value, perform step S60, otherwise, execution step S51.
As preferably, in step S70, data processing unit calculates amount of leakage according to following method, and computing formula is: amount of leakage F_leak=dv/T, wherein dv=(P1-P2) * V/P2, the volume that V is air flue.
As preferably, in described step S30, the first goal-selling force value is high pressure desired value.
As preferably, described high pressure desired value is not less than 30cmH20.
As preferably, in described step S50, the second goal-selling force value is low voltage target value.
As preferably, the volume V of described air flue, in use first by after accurate measuring systems air flue air-capacitor, then defaults in system in the mode of constant.
As preferably, the volume V of described air flue, according to the data of actual measurement, defaults in system in the mode of constant when production.
A kind of lung ventilator, leakage rate testing process in, use the detection method described in above any one.
A kind of Anesthesia machine, leakage rate testing process in, use the detection method described in above any one.
Beneficial effect of the present invention is, because the present invention calculates leakage rate by formula F _ leak=dv/T, wherein dv=(P1*V)/P2 – V=(P1-P2) * V/P2, in formula, time interval T can record easily, when the volume V of air flue calculates as constant, so pressure change being recorded in the unit interval by the gas in air flue, can calculate its leakage volume during this period, reasonably select pressure range and the time interval, can obtain the leakage rate that precision is very high.Because the present invention uses the method for automatic test, own pressure transducer and operation valve in use system, in flow sensor precision be not very high in the situation that, the method of setting by the present invention, can obtain very high leakage rate measuring accuracy, so the present invention avoids using high-precision flow sensor and flowrate control valve, can greatly reduce the cost of equipment, and measuring method is simple.Because the volume V of air flue can measure in advance accurately, be placed in system software in the mode of constant again, also can be according to the data of actual measurement in the time producing, pass to the calculating of software environment for leakage rate by technological means, because the air-capacitor of equipment entirety after producing changes negligible, can become very simple so measure in actual use, the calculating of leakage rate.
Brief description of the drawings
Fig. 1 is the process flow diagram of leakage rate detection method provided by the invention;
Fig. 2 is systemic-function schematic diagram provided by the invention.
In figure:
1, air flue; 2, inlet valve; 3, pressure transducer; 4, outlet valve.
Embodiment
Further illustrate technical scheme of the present invention below by embodiment.
The present invention calculates leakage rate according to the Ideal-Gas Equation (also claiming perfect gas law, C1apeyron equation).The Ideal-Gas Equation is as follows:
pV=nRT
Wherein:
P is gas pressure intensity, the Pa of unit,
V is gas volume, the m of unit
3,
N is the amount of substance of gas, the mol of unit,
T is system temperature, unit K,
R is scale-up factor, and under different situations, numerical value is different, and unit is J/(molK).
In reality test, due to n, R, the variable quantity of T can be ignored, therefore, and the pressure change being recorded in the unit interval by the gas in air flue 1, can calculate its leakage volume during this period, reasonably select pressure range and the time interval, can obtain the leakage rate that precision is very high.
According to the Ideal-Gas Equation pV=nRT, in the ideal situation, n, R, the variable quantity of T can be ignored, and now the Ideal-Gas Equation pV=nRT meets relation:
P1*V=P2(V+dV)
Wherein:
DV is the gas volume of revealing in test process,
And dv=(P1*V)/P2 – V=(P1-P2) * V/P2
Can calculate the leakage flow between (P1+P2)/2 by time interval T:
F_leak=dv/T
Its precision depends on the following aspects:
A. Pressure Sensor Precision, P1, P2 (Pa of unit)
B. timer precision T (unit second)
C. the measuring accuracy V of air flue 1 (unit liter)
The present invention relies on the air-capacitor of equipment itself, and its precision directly affects the result of calculation of the method.Because the air-capacitor difference of the air flue in production run between product 1 is very little, therefore, after use additive method is accurately measured the air-capacitor of air flue 1, can be placed in system software in the mode of constant.Because the air-capacitor variation of equipment entirety after producing is negligible, in actual use, the calculating of measuring leakage rate can become very simple.
In the present embodiment, as a kind of preferred version, the air-capacitor of air flue 1 also can, according to the data of actual measurement in the time producing, be passed to the calculating of software environment for leakage rate by technological means.
Fig. 1 is the process flow diagram of leakage rate detection method provided by the invention; Fig. 2 is systemic-function schematic diagram provided by the invention.In conjunction with Fig. 1 and Fig. 2, show that the step of leakage rate detection method is as follows:
Step S00, Anesthesia machine or lung ventilator enter leakage rate detecting pattern.
Described in step S10, control module control, Anesthesia machine or lung ventilator are opened inlet valve and are closed outlet valve, inflate to described Anesthesia machine or lung ventilator air flue by inlet valve.
Step S20, described control module controlled pressure sensor detect intra-airway pressure, and Real-time Obtaining force value.
Step S30, judging unit judge that whether described air flue current pressure value reaches the first goal-selling force value, if do not reached, performs step S10; If reached, perform step S40.
As preferably, the first goal-selling force value is high pressure desired value, and as further preferably, high pressure desired value is not less than 30cmH20.
Step S40, described control module control Anesthesia machine or lung ventilator are closed inlet valve, obtain the force value of air flue described in current time as the first pressure P 1 simultaneously, and start timer.
Pressure transducer and described timer described in step S50, described control module control, and Real-time Obtaining force value and timing time, described judging unit judges whether whether current pressure value exceed Preset Time lower than default the second goal-selling force value or timing time, if meet any one in two conditions, execution step S60.As preferably, described the second goal-selling force value is low voltage target value.
Step S60, described control module obtain current pressure value and timing time T, and using current force value as the second pressure P 2.
Step S70, described control module are opened described outlet valve, and data processing unit calculates described Anesthesia machine or respirator system amount of leakage.
As preferably, in step S70, data processing unit calculates amount of leakage according to following method, and computing formula is: amount of leakage F_leak=dv/T, wherein dv=(P1-P2) * V/P2, the volume that V is air flue.
In the present embodiment, in step S50, specifically can be divided into following steps:
Described in step S51, described control module control, pressure transducer detects the pressure in air flue, controls described timer timing simultaneously, and Real-time Obtaining force value and timing time.
Step S52, judging unit judge whether the timing time of timer exceedes setting-up time, if exceeded, performs step S60, otherwise, execution step S53.
Step S53, judging unit judge that whether the current pressure value of pressure transducer is lower than the second goal-selling force value, if lower than the second goal-selling force value, perform step S60, otherwise, execution step S51.
The leakage rate automatic testing method of describing in the present embodiment, own pressure transducer 3 and operation valve in a use system, in flow sensor precision, be not very high in the situation that, the method for setting by the present embodiment, can obtain very high leakage rate measuring accuracy.And the measuring method that the present invention uses is simpler, avoids using high-precision flow sensor and flowrate control valve, can greatly reduce the cost of equipment.
The described leakage rate detection method of the present embodiment not only can be applied in Anesthesia machine, is equally applicable to the leakage rate that lung ventilator etc. has other gas apparatus identical with device function shown in systemic-function schematic diagram or device and measures.
Know-why of the present invention has below been described in conjunction with specific embodiments.These are described is in order to explain principle of the present invention, and can not be interpreted as by any way limiting the scope of the invention.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, within these modes all will fall into protection scope of the present invention.
Claims (10)
1. Anesthesia machine or a lung ventilator leakage rate detection method, is characterized in that, comprises the following steps:
Step S00, Anesthesia machine or lung ventilator enter leakage rate detecting pattern;
Described in step S10, control module control, Anesthesia machine or lung ventilator are opened inlet valve (2) and are closed outlet valve (4), inflate to described Anesthesia machine or lung ventilator air flue (1) by inlet valve (2);
Step S20, described control module controlled pressure sensor (3) detect intra-airway pressure, and Real-time Obtaining force value;
Step S30, judging unit judge that whether described air flue current pressure value reaches the first goal-selling force value, if do not reached, performs step S10; If reached, perform step S40;
Step S40, described control module control Anesthesia machine or lung ventilator are closed inlet valve (2), obtain the force value of air flue described in current time as the first pressure P 1 simultaneously, and start timer;
Pressure transducer (3) and described timer described in step S50, described control module control, and Real-time Obtaining force value and timing time, described judging unit judges whether whether current pressure value exceed Preset Time lower than default the second goal-selling force value or timing time, if meet any one in two conditions, execution step S60;
Step S60, described control module obtain current pressure value and timing time T, and using current force value as the second pressure P 2;
Step S70, described control module are opened described outlet valve (4), and data processing unit calculates described Anesthesia machine or respirator system amount of leakage.
2. detection method according to claim 1, is characterized in that, in step S50, comprises the following steps:
Described in step S51, described control module control, pressure transducer (3) detects the pressure in air flue, controls described timer timing simultaneously, and Real-time Obtaining force value and timing time;
Whether the timing time of step S52, monitoring timer exceedes setting-up time, if exceeded, performs step S60, otherwise, execution step S53;
Whether the current pressure value of step S53, monitoring pressure sensor (3) lower than the second goal-selling force value, if lower than the second goal-selling force value, perform step S60, otherwise, execution step S51.
3. detection method according to claim 1, is characterized in that, in step S70, data processing unit calculates amount of leakage according to following method, computing formula is: amount of leakage F_leak=dv/T, and wherein dv=(P1-P2) * V/P2, V is the volume of air flue (1).
4. detection method according to claim 1, is characterized in that, in described step S30, the first goal-selling force value is high pressure desired value.
5. detection method according to claim 4, is characterized in that, described high pressure desired value is not less than 30cmH20.
6. detection method according to claim 1, is characterized in that, in described step S50, the second goal-selling force value is low voltage target value.
7. detection method according to claim 3, is characterized in that, the volume V of described air flue (1) in use first by after accurate measuring systems air flue air-capacitor, then defaults in system in the mode of constant.
8. detection method according to claim 3, is characterized in that, the volume V of described air flue (1) according to the data of actual measurement, defaults in system in the mode of constant when production.
9. a lung ventilator, is characterized in that, leakage rate testing process in, right to use requires the detection method described in 1 to 8 any one.
10. an Anesthesia machine, is characterized in that, leakage rate testing process in, right to use requires the detection method described in 1 to 8 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310109021.2A CN104075857A (en) | 2013-03-29 | 2013-03-29 | Method for detecting leakage of anaesthesia machine or breathing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310109021.2A CN104075857A (en) | 2013-03-29 | 2013-03-29 | Method for detecting leakage of anaesthesia machine or breathing machine |
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| CN201310109021.2A Pending CN104075857A (en) | 2013-03-29 | 2013-03-29 | Method for detecting leakage of anaesthesia machine or breathing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596708A (en) * | 2014-12-23 | 2015-05-06 | 珠海格力电器股份有限公司 | Leakage detection method and device for air conditioner |
| CN113877031A (en) * | 2021-09-30 | 2022-01-04 | 深圳市科曼医疗设备有限公司 | Method and device for calculating leakage flow rate of breathing machine, computer equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196437A (en) * | 1983-04-21 | 1984-11-07 | Hitachi Zosen Corp | Air-leakage inspecting apparatus for radioactive-material transporting container |
| JP2004212152A (en) * | 2002-12-27 | 2004-07-29 | Tamura Electric Works Ltd | Leakage inspection device and pump used therefor |
| CN101592547A (en) * | 2008-05-27 | 2009-12-02 | 北京谊安医疗系统股份有限公司 | The method of anesthesia machine system Leak Detection |
| CN102012243A (en) * | 2010-09-26 | 2011-04-13 | 深圳市百格医疗技术有限公司 | Method for detecting gas leakage quantity of medical instrument with respiration loop |
-
2013
- 2013-03-29 CN CN201310109021.2A patent/CN104075857A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196437A (en) * | 1983-04-21 | 1984-11-07 | Hitachi Zosen Corp | Air-leakage inspecting apparatus for radioactive-material transporting container |
| JP2004212152A (en) * | 2002-12-27 | 2004-07-29 | Tamura Electric Works Ltd | Leakage inspection device and pump used therefor |
| CN101592547A (en) * | 2008-05-27 | 2009-12-02 | 北京谊安医疗系统股份有限公司 | The method of anesthesia machine system Leak Detection |
| CN102012243A (en) * | 2010-09-26 | 2011-04-13 | 深圳市百格医疗技术有限公司 | Method for detecting gas leakage quantity of medical instrument with respiration loop |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596708A (en) * | 2014-12-23 | 2015-05-06 | 珠海格力电器股份有限公司 | Leakage detection method and device for air conditioner |
| CN113877031A (en) * | 2021-09-30 | 2022-01-04 | 深圳市科曼医疗设备有限公司 | Method and device for calculating leakage flow rate of breathing machine, computer equipment and storage medium |
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