CN102580213B - 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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- CN102580213B CN102580213B CN201210076095.6A CN201210076095A CN102580213B CN 102580213 B CN102580213 B CN 102580213B CN 201210076095 A CN201210076095 A CN 201210076095A CN 102580213 B CN102580213 B CN 102580213B
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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 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 very important effect; Existing flow transducer mainly contains hot wire type's flow transducer and differential flow transducer.Hot wire type's flow transducer is to carry out detected gas flow by the temperature variation of heated filament; Differential flow transducer is to produce the pressure drop relevant to flow by the special current-limiting apparatus such as orifice plate or Venturi tube to carry out detected gas flow.Due to measuring principle difference, hot wire type's flow transducer cost is very high comparatively speaking; In addition, owing to there is a large amount of steam, mucus even in anesthetic machine, respirator loop, these all can damage heated filament sensor; Because heated filament sensor cost is high, service life is short, and what therefore differential pressure pickup used in anesthetic machine, respirator is more extensive.
Differential flow transducer, mainly comprises diaphragm type and venturi type flow transducer.Its measuring principle is all: the pressure reduction of measuring 2 gaging holes by pressure transducer; Pressure reduction is directly proportional to flow; Flow is larger, and differential pressure is larger; Difference is: capsule is to allow air-flow through diaphragm, by the different generation of the opening pressure drop of diaphragm; And venturi type sensor is to utilize Venturi effect, allow air-flow pass through the passage of varying aperture, between contraction pipeline section and inlet pipeline, form pressure reduction; Capsule, because flow measurement range and precision are all higher than venturi type, can meet the needs of anesthetic machine adult and children's, neonate ventilation, therefore uses more extensive.Differential flow transducer all needs calibration, and the relation that obtains flow-voltage could be used; By standard device measuring flow, obtain voltage (pressure reduction) by ADC (analog-digital converter, Analog-to-Digital Converter); Due to technological problems, the individual differential pressure of differential pressure flow sensor is difficult to avoid; If need to change flow transducer, 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 occur circuit, and the flow-voltage curve of sensor also can drift about; In order to ensure to measure accurately, do not affect the normal use of machine, guarantee patient safety, also need flow sensor to recalibrate; Therefore traffic alignment convenient, fast and accurately for anesthetic machine produce, maintaining is extremely important.
Please refer to accompanying drawing 1, is a kind of aerating system 100 of traditional anesthetic machine, comprises driving feed channel and the patient end corrugated hose of bellows 120, the exocoel that connects respectively bellows 120 and folding capsule, and control system.Drive the outlet valve 116 that is provided with pressure regulator valve 112, flow valve 114 and outside aerofluxus in feed channel.Control system comprise be connected with bellows 120 manually/automotive 132, manual gasbag 134 and APL valve 136 (Adjustable Pressure Limit Valve, limiting valve with adjustable pressure).Patient end breathing pipeline comprises 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 air-breathing branch road, is provided with expiratory one-way valve 146 and expiratory flow sensor 148 in expiration branch road.Please refer to accompanying drawing 2, in the time of the integrated differential flow transducer of calibration patient circuit, need between air-breathing branch road and expiration branch road, access calibration instrument 170, replace patient end, and then calibrate.
Because air-breathing and expiratory flow sensor are built in loop, gas must could arrive sensor through loop; In order to calibrate the integrated differential flow transducer of patient circuit, need user to proceed as follows: 1, to pull down bellows cover; 2, remove the folding capsule of bellows; 3, again load onto bellows cover; 4, manually/automotive 132 is got to machine control; 5, close driving gas; 6, calibration instrument 170 is gone here and there between air-breathing and exhalation vents; 7, water accumulating cup is opened, to atmosphere; Breather cheek valve 142 regulates the air-flow of different sizes; Through the folding capsule of bellows, arrival inspiratory flow sensor 144, calibration instrument 170 and expiratory flow sensor 148; After having calibrated, need to again load onto folding capsule, water accumulating cup.
The problem of existence is like this, and dismounting is too many, and efficiency is lower; If being installed, bad or neglected loading meeting causes loop gas leakage; And loop air-tightness is the very crucial technical specification of anesthetic machine; Therefore after calibration completes, often can carry out loop leakage detection.And the aerating system 100 of traditional anesthetic machine, calibration success, and calibrated recover afterwards whether good, and higher to operator's requirement, and efficiency is lower; In addition, because folding capsule inside is connected with patient respiration passage, after machine works long hours, folding capsule has a lot of aqueous vapors and mucus, seems messy, easily pollutes operator; Even make user be unwilling to calibrate, affect ventilation precision and the quality of anesthetic machine.In addition, when calibration, must in gas circuit, increase air bleeding valve 143, affect 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 in the time of calibration, and efficiency is high.
A kind of anesthetic machine aerating system, comprising:
Bellows;
The driving air pipe being connected with described bellows and patient end breathing pipeline;
Wherein said patient end breathing pipeline comprises air-breathing branch road and expiration branch road, in described patient end breathing pipeline, is equipped with gas flow sensor; And
Be placed in the control system between described patient end breathing pipeline and described bellows, the gas flow described in described control system control between bellows and described patient end breathing pipeline;
Wherein, also comprise the multidirectional gauge tap of gas being placed between described driving air pipe and bellows, the multidirectional gauge tap of described gas is connected logical simultaneously with described patient end breathing pipeline.
In a preferred embodiment, the multidirectional gauge tap of described gas is gas three-way cock.
In a preferred embodiment, described gas flow sensor is bi-directional flow sensor, is placed in described patient end breathing pipeline for after connecting patient's interface; Or be two one-way flow sensors, be placed in respectively described air-breathing branch road and expiration branch road, be used for respectively measuring the gas flow that patient sucks and breathes out.
In a preferred embodiment, described control system comprise be connected with described bellows and described patient end breathing pipeline simultaneously manually/motor-driven gauge tap.
In a preferred embodiment, described control system also comprise with described manually/manual leather bag and limiting valve with adjustable pressure that motor-driven gauge tap is connected.
In a preferred embodiment, the multidirectional gauge tap of described gas is connected with described expiration branch road.
In a preferred embodiment, in described air-breathing branch road and expiration branch road, be equipped with respectively inspiratory flow sensor and expiratory flow sensor, the multidirectional gauge tap of described gas is connected with described expiration branch road.
In addition, be also necessary to provide a kind of traffic alignment method of aforementioned anesthetic machine aerating system, comprise the following steps:.
Close described control system, gas cannot be circulated between bellows and described patient end breathing pipeline;
Adjust the multidirectional gauge tap of described gas, make the gas of described driving air pipe can not flow to described bellows, but flow to described patient end breathing pipeline;
In described patient end breathing pipeline, access calibration instrument, the gas that described calibration instrument comes in order to described patient end breathing pipeline is circulated is discharged to the external world.
In a preferred embodiment, the described step that accesses calibration instrument in described patient end breathing pipeline is specially: by the described air-breathing branch road of described calibration instrument access.
In above-mentioned anesthetic machine aerating system and 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 is connected with patient end breathing pipeline, in the time carrying out traffic alignment, only need closing control system, make bellows and patient end breathing pipeline can not carry out gas flow, adjust the multidirectional gauge tap of gas simultaneously, make to drive the gas of air pipe can not flow to bellows, but flow to described patient end breathing pipeline, so, in patient end breathing pipeline, access after calibration instrument, the gas that calibration instrument carrys out described patient end breathing pipeline circulation is discharged to the external world, so, just can realize not closing driving air pipe to realize the object of calibration, without dismantling bellows and air bleeding valve being set, simple to operate and efficiency is high.
[brief description of the drawings]
Fig. 1 is the schematic diagram of traditional anesthetic machine aerating system;
Fig. 2 is the schematic diagram of traditional anesthetic machine aerating system while carrying out traffic alignment;
Fig. 3 is the schematic diagram of the anesthetic machine aerating system of present embodiment.
[detailed description of the invention]
Please refer to accompanying drawing 3, driving air pipe and patient end breathing pipeline that the anesthetic machine aerating system 200 of present embodiment comprises bellows 220, is connected with bellows 220, and being placed in the control system between patient end breathing pipeline and bellows, control system is in order to control the gas flow between bellows 220 and patient end breathing pipeline.
Drive in air pipe and be equipped with pressure regulator valve 212, flow valve 214 and outlet valve 216, be used for respectively adjusting stream pressure, air-breathing and aerofluxus.
Control system comprise be connected with bellows 220 and patient end breathing pipeline simultaneously manually/motor-driven gauge tap 232, manually leather bag 234 and APL valve 236 (Adjustable Pressure Limit Valve, limiting valve with adjustable pressure).
Patient end breathing pipeline comprises air-breathing branch road and expiration branch road, wherein in air-breathing branch road, is connected to breather cheek valve 242 and inspiratory flow sensor 244, is connected to expiratory one-way valve 246 and expiratory flow sensor 248 in expiration branch road.Inspiratory flow sensor 244 and expiratory flow sensor 248 are one-way flow sensor, also can replace them with a bi-directional flow sensor, and bi-directional flow sensor is placed in to patient end breathing pipeline for after connecting patient's interface.
The anesthetic machine aerating system 200 of present embodiment also comprises a multidirectional gauge tap 260 of gas, preferably adopts gas three-way cock.The multidirectional gauge tap 260 of gas is placed in and drives between air pipe and bellows 220, and is connected with expiration branch road.The multidirectional gauge tap 260 of gas flows through in order to control driving air pipe the air-flow coming and leads to bellows 220 or expiration branch road.
The calibration process of the anesthetic machine aerating system 200 of present embodiment is as follows:
Closing control system cannot circulate gas between bellows 220 and patient end breathing pipeline;
Adjust the multidirectional gauge tap 260 of gas, make to drive the gas of air pipe can not flow to bellows 220, but flow to patient end breathing pipeline;
In patient end breathing pipeline, access calibration instrument 270, the gas that calibration instrument 270 comes in order to patient end breathing pipeline is circulated is discharged to the external world.
In the process of closing control system, need to, by manually/242 dozens of motor-driven gauge taps to manually, close APL valve 246 simultaneously.
Because the gas that drives air pipe can not flow to bellows 220, but flow to patient end breathing pipeline, gas cannot circulate between bellows 220 and patient end breathing pipeline simultaneously, therefore can only pass through calibration instrument 270 discharged to the external world from the gas that drives air pipe to flow into patient end breathing pipeline, i.e. atmosphere.Particularly, can not get back to bellows 220 from the gas that drives air pipe to flow into expiration branch road, and can only enter air-breathing branch road, so from calibration instrument 270 discharged to the external world.
As shown in the above description, the anesthetic machine aerating system 200 of present embodiment is driving air pipe to set up the multidirectional gauge tap 260 of the gas being connected with expiration branch road, can realize not closing drives air pipe to realize the object of calibration, also without dismounting bellows 220, probability is infected in simple and quick and minimizing, can also reduce the probability that calibration is failed and can not cause breathing circuit gas leakage; While calibration in addition, do not need to arrange air bleeding valve, breathing circuit compact conformation, can reduce dead on the one hand, reduces on the other hand gas leakage source, is also 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 embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, 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 claims.
Claims (7)
1. an anesthetic machine aerating system, is characterized in that, comprising:
Bellows;
The driving air pipe being connected with described bellows and patient end breathing pipeline;
Wherein said patient end breathing pipeline comprises air-breathing branch road and expiration branch road, in described patient end breathing pipeline, is equipped with gas flow sensor; And
Be placed in the control system between described patient end breathing pipeline and described bellows, the gas flow described in described control system control between bellows and described patient end breathing pipeline;
Wherein, also comprise the multidirectional gauge tap of gas being placed between described driving air pipe and bellows, the multidirectional gauge tap of described gas is connected logical simultaneously with described patient end breathing pipeline, and the multidirectional gauge tap of wherein said gas is connected with described expiration branch road.
2. anesthetic machine aerating system according to claim 1, is characterized in that, the multidirectional gauge tap of described gas is gas three-way cock.
3. anesthetic machine aerating system according to claim 1, is characterized in that, described gas flow sensor is bi-directional flow sensor, is placed in described patient end breathing pipeline for after connecting patient's interface; Or be two one-way flow sensors, be placed in respectively described air-breathing branch road and expiration branch road, be used for respectively measuring the gas flow that patient sucks and breathes out.
4. anesthetic machine aerating system according to claim 1, is characterized in that, described control system comprise be connected with described bellows and described patient end breathing pipeline simultaneously manually/motor-driven gauge tap.
5. anesthetic machine aerating system according to claim 4, is characterized in that, described control system also comprise with described manually/manual leather bag and limiting valve with adjustable pressure that motor-driven gauge tap is connected.
6. anesthetic machine aerating system according to claim 1, is characterized in that, in described air-breathing branch road and expiration branch road, is equipped with respectively inspiratory flow sensor and expiratory flow sensor.
7. a traffic alignment method for the anesthetic machine aerating system as described in any one in claim 1 to 6, is characterized in that, comprises the following steps:
Close described control system, gas cannot be circulated between bellows and described patient end breathing pipeline;
Adjust the multidirectional gauge tap of described gas, make the gas of described driving air pipe can not flow to described bellows, but flow to described patient end breathing pipeline;
In described patient end breathing pipeline, access calibration instrument, the gas that described calibration instrument comes in order to described patient end breathing pipeline is circulated is discharged to the external world;
The described step that accesses calibration instrument in described patient end breathing pipeline is specially: by the described air-breathing branch road of described calibration instrument access.
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104075778B (en) * | 2013-03-29 | 2017-12-08 | 北京谊安医疗系统股份有限公司 | A kind of method and its system of the calibration of anesthetic gases flow |
| CN105709318B (en) * | 2014-12-03 | 2018-02-02 | 深圳市科曼医疗设备有限公司 | Breathing equipment and its oxygen concentration testing agency |
| 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 |
| 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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| EP2201979A1 (en) * | 2008-12-23 | 2010-06-30 | General Electric Company | Arrangement and method for supplying breathing gas for respiration |
| CN101972506A (en) * | 2010-08-31 | 2011-02-16 | 深圳市普博科技有限公司 | Ventilating system of anesthesia apparatus and pressure calibration method thereof |
| CN202113453U (en) * | 2011-06-08 | 2012-01-18 | 计宁翔 | Breathing circuit for anesthesia apparatus |
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| CN101288791B (en) * | 2007-04-18 | 2011-09-28 | 深圳迈瑞生物医疗电子股份有限公司 | Anesthesia apparatus respiration apparatus and marking method of its flow sensor |
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Patent Citations (3)
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| EP2201979A1 (en) * | 2008-12-23 | 2010-06-30 | General Electric Company | Arrangement and method for supplying breathing gas for respiration |
| CN101972506A (en) * | 2010-08-31 | 2011-02-16 | 深圳市普博科技有限公司 | Ventilating system of anesthesia apparatus and pressure calibration method thereof |
| CN202113453U (en) * | 2011-06-08 | 2012-01-18 | 计宁翔 | Breathing circuit for anesthesia apparatus |
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