CN102580213A - Ventilation system of anesthesia machine and flow calibrating method of ventilation system - Google Patents
Ventilation system of anesthesia machine and flow calibrating method of ventilation system Download PDFInfo
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- CN102580213A CN102580213A CN2012100760956A CN201210076095A CN102580213A CN 102580213 A CN102580213 A CN 102580213A CN 2012100760956 A CN2012100760956 A CN 2012100760956A CN 201210076095 A CN201210076095 A CN 201210076095A CN 102580213 A CN102580213 A CN 102580213A
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Abstract
The invention relates to a ventilation system of an anesthesia machine, which comprises an air box, a driving gas tube, a patient-end breathing tube, a control system and a gas multi-way control switch, wherein the driving gas tube and the patient-end breathing tube are connected with the air box; the patient-end breathing tube comprises an inspiration branch and an expiration branch, and a gas flow sensor is arranged in the patient-end breathing tube; the control system is arranged between the patient-end breathing tube and the air box and is used for controlling the gas flow between the air box and the patient-end breathing tube; and the gas multi-way control switch is arranged between the driving gas tube and the air box and meanwhile is communicated with the patient-end breathing tube. As the gas multi-way control switch communicated with the patient-end breathing tube is arranged in the driving gas tube, the ventilation system of the anesthesia machine can realize the purpose that the gas flow sensor is calibrated under the condition that driving gas is not closed. In addition, the invention also provides a flow calibrating method of the ventilation system of the anesthesia machine.
Description
[technical field]
The present invention relates to the armarium technology, particularly relate to a kind of anesthetic machine aerating system and traffic alignment method thereof.
[background technology]
Flow transducer is widely used in anesthetic machine, respirator, and in respiratory mechanics monitor and tidal volume control and patient's autonomous respiration triggering, flow transducer plays important effect; Existing flow transducer mainly contains hot wire type's flow transducer and differential flow transducer.Hot wire type's flow transducer is that the temperature variation through heated filament comes the detected gas flow; Differential flow transducer is to produce the pressure drop relevant with flow through current-limiting apparatus such as special orifice plate or Venturi tubes to come the detected gas flow.Because measuring principle is different, hot wire type's flow transducer cost is very high comparatively speaking; In addition, owing to having a large amount of steam even mucus in anesthetic machine, the respirator loop, these all can damage the heated filament pick off; Because heated filament pick off cost is high, service life is short, thus differential pressure pickup in anesthetic machine, respirator, use more extensive.
Differential flow transducer mainly comprises diaphragm type and venturi type flow transducer.Its measuring principle all is: the pressure reduction of measuring 2 gaging holes through pressure transducer; Pressure reduction is directly proportional with flow; Flow is big more, and differential pressure is big more; Different is: capsule is to let air-flow through diaphragm, through the different generation of diaphragm-operated opening pressure drop; And the venturi type pick off is to utilize Venturi effect, lets air-flow pass through the passage of varying aperture, between contraction pipeline section and inlet pipeline, forms pressure reduction; Capsule can satisfy the needs of anesthetic machine adult and children's, neonate ventilation because flow measurement range and precision all are higher than venturi type, therefore uses more extensive.Differential flow transducer all needs calibration, and the relation that obtains flow-voltage could be used; Measure flow through standard device, obtain voltage (pressure reduction) through ADC (analog-digital converter, Analog-to-Digital Converter); Because technological problems, the individual differential pressure of differential pressure flow sensor is difficult to avoid; Change flow transducer if desired, then need to recalibrate; In addition, after working long hours, the flow transducer of same anesthetic machine, respirator is because diaphragm is aging, drift etc. can take place circuit, and the flow-voltage curve of pick off also can drift about; In order to guarantee to measure accurately, do not influence the normal use of machine, guarantee patient safety, also need flow sensor to recalibrate; Therefore traffic alignment convenient, fast and accurately extremely important for anesthetic machine production, maintaining.
Please refer to accompanying drawing 1, be a kind of aerating system 100 of traditional anesthetic machine, comprise bellows 120, connect the exocoel of bellows 120 and the driving feed channel and the patient end corrugated hose of folding capsule respectively, reach control system.Drive in the feed channel and be provided with pressure regulator valve 112, flow valve 114 and outside deflated outlet valve 116.Control system comprise link to each other with bellows 120 manually/motor-driven switch 132, manual gasbag 134 and APL valve 136 (Adjustable Pressure Limit Valve, adjustable pressure limiting valve).Patient end is breathed pipeline and is comprised air-breathing branch road and expiration branch road, is provided with breather cheek valve 142, air bleeding valve 143 and inspiratory flow sensor 144 in the air-breathing branch road, is provided with expiratory one-way valve 146 and expiratory gas flow pick off 148 in the expiration branch road.Please refer to accompanying drawing 2, when the integrated differential flow transducer of calibration patient circuit, need between air-breathing branch road and expiration branch road, insert calibration instrument 170, the replacement patient end, and then calibrate.
Because air-breathing and expiratory gas flow pick off is built in the loop, gas must could arrive pick off through the loop; In order to calibrate the integrated differential flow transducer of patient circuit, need the user to operate as follows: 1, to pull down the bellows cover; 2, remove the folding capsule of bellows; 3, load onto the bellows cover again; 4, manual/motor-driven switch 132 is got to the machine control; 5, close driving gas; 6, calibration instrument 170 is gone here and there between air-breathing and exhalation vents; 7, the hydrops cup is opened, atmosphere; Breather cheek valve 142 is regulated the air-flow of different sizes; Through the folding capsule of bellows, arrival inspiratory flow sensor 144, calibration instrument 170 and expiratory gas flow pick off 148; After having calibrated, need load onto folding capsule again, the hydrops cup.
The problem of existence is like this, and dismounting is too many, and efficient is lower; If install bad or the neglected loading meeting causes loop gas leakage; And the loop air-tightness is the very crucial technical specification of anesthetic machine; Therefore after calibration is accomplished, carry out loop leakage through regular meeting and detect.And the aerating system 100 of traditional anesthetic machine, can calibration successful, and calibration recover after accomplishing whether good, than higher, and efficient is lower to operator's requirement; In addition, because folding capsule inside links to each other with the patient respiration passage, after machine worked long hours, folding capsule had a lot of aqueous vapors and mucus, seemed messy, polluted the operator easily; Even make that the user is unwilling to calibrate, influence the ventilation precision and the quality of anesthetic machine.In addition, must in gas circuit, increase air bleeding valve 143 during calibration, influence the complexity of gas circuit, also increase a possible fault (gas leakage) point.
[summary of the invention]
Based on this, be necessary to provide a kind of anesthetic machine aerating system, it is easy and simple to handle when calibration, and efficient is high.
A kind of anesthetic machine aerating system comprises:
Bellows;
Driving air pipe that links to each other with said bellows and patient end are breathed pipeline;
Wherein said patient end is breathed pipeline and is comprised air-breathing branch road and expiration branch road, and said patient end breathing pipeline is mid-to have gas flow sensor; And
Place said patient end to breathe the control system between pipeline and said bellows, said control system controls said bellows and said patient end is breathed the gas flow between the pipeline;
Wherein, also comprise the multidirectional gauge tap of gas that places between said driving air pipe and the bellows, the multidirectional gauge tap of said gas is breathed pipeline with said patient end simultaneously and is connected logical.
In a preferred embodiment, the multidirectional gauge tap of said gas is the gas three-way cock.
In a preferred embodiment, said gas flow sensor is a bi-directional flow sensor, places said patient end to breathe pipeline and is used to connect after patient's the interface; Or be two one-way flow pick offs, place said air-breathing branch road and expiration branch road respectively, be used for measuring the gas flow that patient sucks and breathes out respectively.
In a preferred embodiment, said control system comprises the manual/motor-driven gauge tap that is connected with said bellows and said patient end breathing pipeline simultaneously.
In a preferred embodiment, said control system also comprise with said manually/manual leather bag and adjustable pressure limiting valve that motor-driven gauge tap is connected.
In a preferred embodiment, the multidirectional gauge tap of said gas is connected with said expiration branch road.
In a preferred embodiment, be equipped with inspiratory flow sensor and expiratory gas flow pick off in said air-breathing branch road and the expiration branch road respectively, the multidirectional gauge tap of said gas is connected with said expiration branch road.
In addition, also be necessary to provide a kind of traffic alignment method of aforementioned anesthetic machine aerating system, may further comprise the steps:.
Close said control system, make gas breathe between the pipeline and can't circulate at bellows and said patient end;
Adjust the multidirectional gauge tap of said gas, make the gas of said driving air pipe can not flow to said bellows, breathe pipeline but flow to said patient end;
In said patient end breathing pipeline, insert calibration instrument, said calibration instrument is in order to breathe said patient end the next gas row of pipeline circulation to the external world.
In a preferred embodiment, the said step that in said patient end breathing pipeline, inserts calibration instrument is specially: said calibration instrument is inserted said air-breathing branch road.
In above-mentioned anesthetic machine aerating system and the traffic alignment method thereof, between driving air pipe and bellows, be provided with the multidirectional gauge tap of gas, and the multidirectional gauge tap of gas links to each other with patient end breathing pipeline; When carrying out traffic alignment, only need the closing control system, make bellows and patient end breathe pipeline and can not carry out gas flow; Adjust the multidirectional gauge tap of gas simultaneously; Make the gas that drives air pipe can not flow to bellows, breathe pipeline but flow to said patient end, so; After in patient end breathing pipeline, inserting calibration instrument, calibration instrument is breathed the next gas of pipeline circulation with said patient end and is arranged to the external world; So, just can realize not closing driving the purpose that air pipe is realized calibration, need not to dismantle bellows and air bleeding valve is set, simple to operate and efficient is high.
[description of drawings]
Fig. 1 is the sketch map of traditional anesthetic machine aerating system;
Sketch map when Fig. 2 carries out traffic alignment for traditional anesthetic machine aerating system;
Fig. 3 is the sketch map of the anesthetic machine aerating system of this embodiment.
[specific embodiment]
Please refer to accompanying drawing 3; The anesthetic machine aerating system 200 of this embodiment comprises bellows 220, the driving air pipe that links to each other with bellows 220 and patient end breathing pipeline; And placing patient end to breathe the control system between pipeline and bellows, control system is breathed the gas flow between the pipeline in order to control bellows 220 and patient end.
Drive in the air pipe and be equipped with pressure regulator valve 212, flow valve 214 and outlet valve 216, be used for adjusting stream pressure, air-breathing and aerofluxus respectively.
Control system comprise simultaneously with bellows 220 and patient end breathe that pipeline is connected manually/motor-driven gauge tap 232, manually leather bag 234, and APL valve 236 (Adjustable Pressure Limit Valve, adjustable pressure limiting valve).
Patient end is breathed pipeline and is comprised air-breathing branch road and expiration branch road, is connected to breather cheek valve 242 and inspiratory flow sensor 244 in the wherein air-breathing branch road, is connected to expiratory one-way valve 246 and expiratory gas flow pick off 248 in the expiration branch road.Inspiratory flow sensor 244 is the one-way flow pick off with expiratory gas flow pick off 248, also can use a bi-directional flow sensor to replace them, places patient end to get final product after breathing the interface that pipeline is used to connect patient bi-directional flow sensor.
The anesthetic machine aerating system 200 of this embodiment also comprises a multidirectional gauge tap 260 of gas, preferably adopts the gas three-way cock.The multidirectional gauge tap 260 of gas places and drives between air pipe and the bellows 220, and is connected with the expiration branch road.The multidirectional gauge tap 260 of gas drives air pipe in order to control and flows through next air communication to bellows 220 or expiration branch road.
The calibration process of the anesthetic machine aerating system 200 of this embodiment is following:
The closing control system makes gas breathe between the pipeline and can't circulate at bellows 220 and patient end;
The multidirectional gauge tap 260 of adjustment gas makes the gas that drives air pipe can not flow to bellows 220, breathes pipeline but flow to patient end;
Breathe access calibration instrument 270 in the pipeline at patient end, calibration instrument 270 is in order to breathe patient end the next gas row of pipeline circulation to the external world.
In the process of closing control system, needing will be manually/and 242 dozens of motor-driven gauge taps are to manually, close APL valve 246 simultaneously.
Can not flow to bellows 220 owing to drive the gas of air pipe; Breathe pipeline but flow to patient end; While gas can't circulate between bellows 220 and patient end breathing pipeline, arranges to the external world so can only pass through calibration instrument 270 from the gas that drives air pipe inflow patient end breathing pipeline, i.e. atmosphere.Particularly, can not get back to bellows 220 from the gas that drives air pipe inflow expiration branch road, and can only get into air-breathing branch road, and then arrange to the external world from calibration instrument 270.
Can know by above-mentioned explanation; The anesthetic machine aerating system 200 of this embodiment has been set up the multidirectional gauge tap 260 of the gas that is connected with the expiration branch road at the driving air pipe; Can realize not closing the purpose that drives air pipe realization calibration; Also need not to dismantle bellows 220, probability is infected in simple and quick and minimizing, can also reduce the calibration failed probability and can not cause breathing circuit gas leakage; Air bleeding valve need be set when calibrating in addition, the breathing circuit compact conformation can reduce the dead space amount on the one hand, then reduces the gas leakage source on the other hand, also is to reduce the parts that cause cross infection on the one hand.Further, use above-mentioned calibration steps, can calibrate many anesthetic machines simultaneously.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (9)
1. an anesthetic machine aerating system is characterized in that, comprising:
Bellows;
Driving air pipe that links to each other with said bellows and patient end are breathed pipeline;
Wherein said patient end is breathed pipeline and is comprised air-breathing branch road and expiration branch road, and said patient end breathing pipeline is mid-to have gas flow sensor; And
Place said patient end to breathe the control system between pipeline and said bellows, said control system controls said bellows and said patient end is breathed the gas flow between the pipeline;
Wherein, also comprise the multidirectional gauge tap of gas that places between said driving air pipe and the bellows, the multidirectional gauge tap of said gas is breathed pipeline with said patient end simultaneously and is connected logical.
2. anesthetic machine aerating system according to claim 1 is characterized in that, the multidirectional gauge tap of said gas is the gas three-way cock.
3. anesthetic machine aerating system according to claim 1 is characterized in that said gas flow sensor is a bi-directional flow sensor, places said patient end to breathe pipeline and is used to connect after patient's the interface; Or be two one-way flow pick offs, place said air-breathing branch road and expiration branch road respectively, be used for measuring the gas flow that patient sucks and breathes out respectively.
4. anesthetic machine aerating system according to claim 1 is characterized in that, said control system comprises simultaneously breathes manual/motor-driven gauge tap that pipeline is connected with said bellows and said patient end.
5. anesthetic machine aerating system according to claim 4 is characterized in that, said control system also comprise with said manually/manual leather bag and adjustable pressure limiting valve that motor-driven gauge tap is connected.
6. anesthetic machine aerating system according to claim 1 is characterized in that, the multidirectional gauge tap of said gas is connected with said expiration branch road.
7. anesthetic machine aerating system according to claim 1 is characterized in that, is equipped with inspiratory flow sensor and expiratory gas flow pick off in said air-breathing branch road and the expiration branch road respectively, and the multidirectional gauge tap of said gas is connected with said expiration branch road.
8. the traffic alignment method like each described anesthetic machine aerating system in the claim 1 to 7 is characterized in that, may further comprise the steps:
Close said control system, make gas breathe between the pipeline and can't circulate at bellows and said patient end;
Adjust the multidirectional gauge tap of said gas, make the gas of said driving air pipe can not flow to said bellows, breathe pipeline but flow to said patient end;
In said patient end breathing pipeline, insert calibration instrument, said calibration instrument is in order to breathe said patient end the next gas row of pipeline circulation to the external world.
9. the traffic alignment method of an anesthetic machine aerating system as claimed in claim 8 is characterized in that, the said step that in said patient end breathing pipeline, inserts calibration instrument is specially: said calibration instrument is inserted said air-breathing branch road.
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| CN201210076095.6A CN102580213B (en) | 2012-03-21 | 2012-03-21 | Ventilation system of anesthesia machine and flow calibrating method of ventilation system |
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| CN201210076095.6A CN102580213B (en) | 2012-03-21 | 2012-03-21 | Ventilation system of anesthesia machine and flow calibrating method of ventilation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104075778A (en) * | 2013-03-29 | 2014-10-01 | 北京谊安医疗***股份有限公司 | Anesthetic gas flow calibration method and system |
| WO2016086445A1 (en) * | 2014-12-03 | 2016-06-09 | 深圳市科曼医疗设备有限公司 | Breathing equipment and oxygen concentration detection mechanism thereof |
| CN107335119A (en) * | 2017-08-18 | 2017-11-10 | 南京乐基医疗器械有限公司 | Anesthesia machine and its bellows pneumatic drive system |
| WO2019075747A1 (en) * | 2017-10-20 | 2019-04-25 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia machine, oxygen battery calibration system and calibration method thereof |
| CN109821120A (en) * | 2019-02-25 | 2019-05-31 | 深圳融昕医疗科技有限公司 | Blowing method, system and the ventilator with the system |
| CN112569440A (en) * | 2020-12-07 | 2021-03-30 | 上海力申科学仪器有限公司 | Dynamic calibration device and method for zero position of flow sensor of anesthesia machine |
| CN116782972A (en) * | 2020-12-31 | 2023-09-19 | 深圳迈瑞动物医疗科技股份有限公司 | Breathing ventilation method, device, anesthesia machine and computer readable storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075778A (en) * | 2013-03-29 | 2014-10-01 | 北京谊安医疗***股份有限公司 | Anesthetic gas flow calibration method and system |
| CN104075778B (en) * | 2013-03-29 | 2017-12-08 | 北京谊安医疗***股份有限公司 | A kind of method and its system of the calibration of anesthetic gases flow |
| WO2016086445A1 (en) * | 2014-12-03 | 2016-06-09 | 深圳市科曼医疗设备有限公司 | Breathing equipment and oxygen concentration detection mechanism thereof |
| CN107335119A (en) * | 2017-08-18 | 2017-11-10 | 南京乐基医疗器械有限公司 | Anesthesia machine and its bellows pneumatic drive system |
| WO2019075747A1 (en) * | 2017-10-20 | 2019-04-25 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia machine, oxygen battery calibration system and calibration method thereof |
| CN109821120A (en) * | 2019-02-25 | 2019-05-31 | 深圳融昕医疗科技有限公司 | Blowing method, system and the ventilator with the system |
| CN112569440A (en) * | 2020-12-07 | 2021-03-30 | 上海力申科学仪器有限公司 | Dynamic calibration device and method for zero position of flow sensor of anesthesia machine |
| CN112569440B (en) * | 2020-12-07 | 2023-10-27 | 上海力申科学仪器有限公司 | Dynamic calibration device and method for zero position of flow sensor of anesthesia machine |
| CN116782972A (en) * | 2020-12-31 | 2023-09-19 | 深圳迈瑞动物医疗科技股份有限公司 | Breathing ventilation method, device, anesthesia machine and computer readable storage medium |
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| CN102580213B (en) | 2014-11-05 |
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