CN101455872A - Calibrating method of tidal volume of anesthesia apparatus - Google Patents
Calibrating method of tidal volume of anesthesia apparatus Download PDFInfo
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- CN101455872A CN101455872A CNA2008102078645A CN200810207864A CN101455872A CN 101455872 A CN101455872 A CN 101455872A CN A2008102078645 A CNA2008102078645 A CN A2008102078645A CN 200810207864 A CN200810207864 A CN 200810207864A CN 101455872 A CN101455872 A CN 101455872A
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Abstract
The invention relates to a method for calibrating the tidal volume of an anesthetic machine, which comprises the following steps: firstly, setting the respiratory frequency and the inhalation/exhalation ratio of the anesthetic machine; secondly, setting the flow range according to actual requirements, and selecting an initial point and a plurality of intermediate flow points within the flow range as calibration points; thirdly, obtaining the value of the tidal volume corresponding to each callibration point by calculation through a formula V=FT, wherein V refers to tidal volume, F refers to inspiratory flow rate, and T refers to inspiratory time; fourthly, using a calibrated tidal volume measuring device as the standard to adjust the opening degree of flow control valves, searching for the tidal volume of the calibration points one by one, and recording and storing positions to which knobs of the flow control valves with tidal volumes searched are switched; and fifthly, establishing a fitting curve chart of the flow rate and the positions of the knobs of the flow control valves, so as to control the flow rate by adjusting the positions of the knobs of the flow control valves. The method improves the precision of calibration of the tidal volume.
Description
Technical field
The present invention relates to a kind of scaling method, particularly a kind of scaling method that is used for medical anesthesia respirator tidal volume.
Background technology
The tidal volume of existing anesthetic machine generally all adopts operated proportional flow control valve to control, and proportional solenoid is controlled the aperture of the restriction of choke valve or flow speed control valve by input signal PWM, realizes controlling continuously or pari passu the output flow of tidal volume.The opening degree of restriction is by the voltage pwm size decision of the input signal of proportional solenoid, operated proportional flow control valve is mainly used in out circuit controls (open loopcontrol), the output of proportional control valve and the proportional relation of input signal PWM, and the magnetic force that solenoid is produced in proportional control valve size is directly proportional with electric current, thereby the opening degree of control orifice is controlled the size of flow.
The scaling method of the tidal volume of existing anesthetic machine all is to adopt the opening degree of demarcating control valve by changing, controls the flow of flow control valve by opening degree, makes the consistent purpose that reaches the demarcation tidal volume of tidal volume of tidal volume and setting this flow under.
But, because patient expired end and flow-control end exist device dead space amount and pipeline vapour lock, existing scaling method is by increasing proportionality coefficient analog dead space amount and increasing the tidal volume that a gas resistance device simulation pipeline vapour lock is adjusted the end of breathing out at flow control valve, and the own wt and the influence of some extraneous factors of in fact installing dead space amount, pipeline aperture, bellows are very difficult mimic fully, tending to produce very big error, is accurate inadequately so only depend on by increasing proportionality coefficient and gas resistance device.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of scaling method of anesthesia apparatus tidal volume, improves medical anesthetic machine effectively to the accuracy that patient sucks or the exhalation tidal volume is controlled, can visual and accurate control tidal volume.
For solving the problems of the technologies described above, the present invention takes following technical scheme:
The scaling method of a kind of anesthesia apparatus tidal volume of the present invention comprises the steps: that (1) set the respiratory frequency and the inspiratory/expiratory of anesthetic machine; (2) set range of flow according to the actual requirements, and in the middle of in described range of flow, choosing starting point and several flow points as fixed point; (3) calculated the value of the pairing tidal volume of each above-mentioned fixed point by formula V=FT, wherein, V is a tidal volume, and F is an inspiratory flow, and T is an inspiratory duration; (4) with the tidal volume measuring device demarcated as standard, regulate the opening degree of flow control valve, the tidal volume of above-mentioned fixed point is searched for one by one, and the location records that the flow control valve knob that searches tidal volume is forwarded to and preserving; (5) set up the matched curve figure of a flow and flow control valve knob position, can control flow by regulating the flow control valve knob position.
Described matched curve figure is linked to be in turn by the coordinate points of flow and flow control valve knob position correspondence.
The scaling method of anesthesia apparatus tidal volume of the present invention, improved the degree of accuracy that tidal volume is demarcated, adopt the flow of directly regulating volume control device to adjust tidal volume, avoided fully because the own wt of device dead space amount, pipeline aperture, bellows and some extraneous factors influences the error that causes when tidal volume is measured, had efficient height, accuracy height and a plurality of advantages such as easy to operate.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below the present invention is further elaborated.
A kind of scaling method of anesthesia apparatus tidal volume, it comprises the steps:
(1) respiratory frequency and the respiratory quotient of setting anesthetic machine are set in calibration mode with anesthetic machine, and the respiratory frequency of machine and inspiratory/expiratory (I:E) also just are determined under this pattern, are 20 times/minute such as setting respiratory frequency, and inspiratory/expiratory (I:E) is 1:2;
(2) in the range of flow of demarcating, choose several flow points arbitrarily as fixed point, preferable, we choose starting point and intermediary several flow as fixed point, such as range of flow is 1980～72000mL/min, and we choose the flow of 1980L/min, 6000mL/min, 12000mL/min, 18000mL/min, 30000mL/min, 48000mL/min, 72000mL/min this some;
(3) calculate the value of tidal volume by formula V=FT, wherein, the unit of tidal volume V is mL, the unit of inspiratory flow F is mL/min, the unit of inspiratory duration T is min, under the situation of respiratory frequency of determining and inspiratory/expiratory, such as inspiratory flow is 18000mL/min, inspiratory duration be 1/ (20 times/min) * 1/ (1+2)=1/60min/ time, then tidal volume is V=18000L/min * 1/60min=300mL, the tidal volume of above-mentioned like this each flow correspondence of choosing just can be calculated, and is respectively 33mL, 100mL, 200mL, 300mL, 500mL, 800mL, 1200mL;
(4) with the tidal volume measuring device demarcated as standard, the opening degree of manual adjustments flow control valve, tidal volume to above-mentioned fixed point is searched for one by one, and the location records that the flow control valve knob that searches tidal volume is forwarded to and preserving, the tidal volume that measures such as the tidal volume measuring device is 33ml, regulate the location records position such as the A1 at this moment of flow control valve knob, the ascending then tidal volume 100mL that searches for other one by one, 200mL, 300mL, 500mL, 800mL, 1200mL, the position that obtains is A2 respectively, A3, A4, A5, A6, A7 obtains a flow like this and is respectively 1980L/min, 6000mL/min, 12000mL/min, 18000mL/min, 30000mL/min, 48000mL/min, 72000mL/min and flow control valve knob position are respectively A1, A2, A3, A4, A5, A6, the curve one to one of A7;
(5) according to the actual demand of degree of accuracy, we can increase and choose several flow points in the step 2, so just set up the matched curve figure of a flow and flow control valve knob position, under respiratory frequency of setting and inspiratory/expiratory, the tidal volume of setting just can be calculated flow value, extrapolate the flow control valve knob position A of this moment according to matched curve figure again and control flow, realized the manual demarcation of tidal volume.
The manual scaling method of anesthesia apparatus tidal volume of the present invention, by the corresponding relation between tidal volume and the flow, i.e. V=F*T obtains the corresponding curve chart of a flow and flow control valve position of rotation, has improved the degree of accuracy that tidal volume is demarcated.
The present invention also proposes the tidal volume measuring device directly is connected with patient expired end, make the machine that adopts scaling method of the present invention in running order following time, adjust the position of flow control valve knob by the tidal volume of the patient expired end of real-time measurement, any owing to not existing between flow control valve and the exhalation end because device dead space amount and vapour lock cause the measurement error of tidal volume, improved the tidal volume certainty of measurement greatly.
More than show and described ultimate principle of the present invention and principal character and advantage thereof.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1, a kind of scaling method of anesthesia apparatus tidal volume is characterized in that, comprises the steps:
(1) respiratory frequency and the inspiratory/expiratory of setting anesthetic machine;
(2) set range of flow according to the actual requirements, and in the middle of in described range of flow, choosing starting point and several flow points as fixed point;
(3) calculated the value of the pairing tidal volume of each above-mentioned fixed point by formula V=FT, wherein, V is a tidal volume, and F is an inspiratory flow, and T is an inspiratory duration;
(4) with the tidal volume measuring device demarcated as standard, regulate the opening degree of flow control valve, the tidal volume of above-mentioned fixed point is searched for one by one, and the location records that the flow control valve knob that searches tidal volume is forwarded to and preserving;
(5) set up the matched curve figure of a flow and flow control valve knob position, can control flow by regulating the flow control valve knob position.
2, the manual scaling method of a kind of anesthesia apparatus tidal volume according to claim 1 is characterized in that: described matched curve figure is linked to be in turn by the coordinate points of flow and flow control valve knob position correspondence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102078645A CN101455872A (en) | 2008-12-26 | 2008-12-26 | Calibrating method of tidal volume of anesthesia apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102078645A CN101455872A (en) | 2008-12-26 | 2008-12-26 | Calibrating method of tidal volume of anesthesia apparatus |
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| CN101455872A true CN101455872A (en) | 2009-06-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114288A (en) * | 2009-12-31 | 2011-07-06 | 北京谊安医疗系统股份有限公司 | Tidal volume control method |
| CN103185630A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | System and method for checking sensor in breathing machine |
| WO2015032325A1 (en) * | 2013-09-03 | 2015-03-12 | 北京谊安医疗系统股份有限公司 | Flow calibration method and system for an anesthesia machine flow sensor |
| CN105983164A (en) * | 2016-04-21 | 2016-10-05 | 广州七喜医疗设备有限公司 | Method for improving tidal volume control accuracy |
| CN106913946A (en) * | 2015-12-25 | 2017-07-04 | 北京谊安医疗系统股份有限公司 | A kind of method that tidal volume is adjusted under IPPV ventilating modes |
-
2008
- 2008-12-26 CN CNA2008102078645A patent/CN101455872A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114288A (en) * | 2009-12-31 | 2011-07-06 | 北京谊安医疗系统股份有限公司 | Tidal volume control method |
| CN102114288B (en) * | 2009-12-31 | 2013-10-23 | 北京谊安医疗系统股份有限公司 | Tidal volume control method |
| CN103185630A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | System and method for checking sensor in breathing machine |
| CN103185630B (en) * | 2011-12-30 | 2016-03-02 | 北京谊安医疗系统股份有限公司 | The check system of sensor and method in a kind of lung ventilator |
| WO2015032325A1 (en) * | 2013-09-03 | 2015-03-12 | 北京谊安医疗系统股份有限公司 | Flow calibration method and system for an anesthesia machine flow sensor |
| EA031782B1 (en) * | 2013-09-03 | 2019-02-28 | Бейджин Аеонмед Ко., Лтд. | Flow calibration method and system for an anesthesia machine flow sensor |
| CN106913946A (en) * | 2015-12-25 | 2017-07-04 | 北京谊安医疗系统股份有限公司 | A kind of method that tidal volume is adjusted under IPPV ventilating modes |
| CN105983164A (en) * | 2016-04-21 | 2016-10-05 | 广州七喜医疗设备有限公司 | Method for improving tidal volume control accuracy |
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Application publication date: 20090617 |