CN102266623B - Method and device for controlling gas supply of anaesthesia machine and anaesthesia machine containing device - Google Patents
Method and device for controlling gas supply of anaesthesia machine and anaesthesia machine containing device Download PDFInfo
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- CN102266623B CN102266623B CN201010620590.XA CN201010620590A CN102266623B CN 102266623 B CN102266623 B CN 102266623B CN 201010620590 A CN201010620590 A CN 201010620590A CN 102266623 B CN102266623 B CN 102266623B
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- flow velocity
- tidal volume
- anesthetic machine
- inlet valve
- effusion meter
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Abstract
The invention relates to a method for controlling gas supply of an anaesthesia machine, which comprises the following steps: recording target tidal volume of an anaesthesia machine; judging whether the flow rate of a flowmeter is zero; if so, determining the closing degree of an inspiratory valve of the anaesthesia machine according to the target tidal volume; and if not, determining the closing degree of the inspiratory valve of the anaesthesia machine according to the target tidal volume and the flow rate of the flowmeter. The invention also relates to a device for controlling gas supply of an anaesthesia machine and an anaesthesia machine containing the same. The method or device provided by the invention can be used for bringing the flow of the flowmeter into the metering range in real time, and can implement linkage with the inspiratory valve, so that the actual gas amount supplied to the patient conforms to the preset tidal volume, thereby ensuring the safety of the patient.
Description
Technical field
The present invention relates to field of medical, relate in particular to a kind of anesthetic machine of controlling the method and apparatus of anesthetic machine air demand and comprising this device.
Background technology
Anesthetic machine needs to determine corresponding air demand according to patient's tidal volume at work.Tidal volume refers to people's each tolerance that sucks or breathe out under static state.As shown in Figure 1, be the operation principle sketch of anesthetic machine.Source of the gas is communicated to inlet valve, inlet valve is a part for anesthetic machine, is used to anesthetic machine that driving power is provided, and the gas reality of process inlet valve does not flow to patient, but driving anesthetic machine that the discharge capacity of a respective amount is provided, this discharge capacity is patient's tidal volume preferably in theory.Driven by this, the gas of respective amount can be carried to patient in loop.Conventionally in operation, doctor can supplement patient's consumption according to clinical experience and actual demand by pipeline A, certain anaesthetic is provided simultaneously, and doctor directly adjusts flow by adjusting shutoff valve, and electronic flowmeter is arranged to certain value.
In the prior art, medical worker can set a tidal volume according to patient's concrete condition in anesthetic machine, CPU in anesthetic machine can control according to the amount of this setting the flow of inlet valve, the discharge capacity that inlet valve can be provided set (tidal volume of setting), like this, loop, under the driving of this discharge capacity, can provide the tidal volume that is equivalent to this discharge capacity to patient.
When anesthetic machine in service, after setting tidal volume, if open effusion meter place pipeline, the gas of this pipeline of flowing through also can offer patient, can cause so the actual patient's of offering gas can surpass original tidal volume of setting, in other words, the gas on process this road of effusion meter is offered patient extraly, this can bring great risk to patient, because can carry extra tidal volume to patient.
Summary of the invention
The object of the invention is to solve anesthetic machine in prior art and can not accurately control the problem of required air demand.
For achieving the above object, according to an aspect of the present invention, provide a kind of method of controlling anesthetic machine air demand, having comprised:
-record the target tidal volume of anesthetic machine;
-judge whether the flow velocity of effusion meter is zero;
If the flow velocity of-described effusion meter is zero, according to described target tidal volume, determine the closed degree of the inlet valve of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine.According to another aspect of the present invention, provide a kind of for controlling the device of anesthetic machine air demand, having comprised: storage device, for recording anesthetic machine target tidal volume; Accountant, for judging whether the flow velocity of effusion meter is zero; If the flow velocity of described effusion meter is zero, according to described target tidal volume, determine the closed degree of the inlet valve of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine.
The present invention also provides a kind of device of controlling anesthetic machine air demand, comprising: storage device, for recording anesthetic machine target tidal volume; Accountant, for judging whether the flow velocity of effusion meter is zero; If the flow velocity of described effusion meter is zero, according to described target tidal volume, determine the closed degree of the inlet valve of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine.
According to a further aspect of the invention, also provide a kind of anesthetic machine, included the device of foregoing control anesthetic machine air demand.
By method of the present invention, device and anesthetic machine, can in real time the flow of effusion meter be included in measures range, and the interlock of realization and inlet valve, coincide the real gas amount and the predefined tidal volume that offer patient, has guaranteed patient's safety.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the fundamental diagram of anesthetic machine;
Fig. 2 is the flow chart of the inventive method; And
Fig. 3 is the flow chart of a specific embodiment of the present invention.
The specific embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Fig. 2 shows according to the flow chart of the method for control anesthetic machine air demand of the present invention, and the method comprises:
The first step, records anesthetic machine target tidal volume;
Second step, judges whether the flow velocity of effusion meter is zero;
The 3rd step, if the flow velocity of effusion meter is zero, determines the closed degree of the inlet valve of anesthetic machine according to target tidal volume, if the flow velocity of effusion meter is greater than zero, according to the flow velocity of target tidal volume and effusion meter, determine the closed degree of the inlet valve of anesthetic machine.
In a specific embodiment shown in Fig. 3, the method according to this invention specifically comprises step below:
The first step, anesthetic machine is by needing to offer patient's target tidal volume V under memory means record
t.
Second step, in inlet valve running, judges by CPU whether the flow velocity of effusion meter is zero, and this can realize by the sensor being connected on effusion meter, and this sensor can be communicated by letter with CPU.
The 3rd step, when the flow velocity of effusion meter is zero, CPU determines the due flow velocity of inlet valve according to target tidal volume, then according to the closed degree of this due flow speed control inlet valve, the tolerance that makes anesthetic machine offer patient is target tidal volume V
t, the computing formula of inlet valve flow velocity is:
Wherein, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration;
In the second situation, if the flow velocity of effusion meter is greater than zero, CPU determines the due flow velocity of inlet valve according to the flow velocity of target tidal volume and effusion meter, then according to this due flow velocity, determines the closed degree of the inlet valve of anesthetic machine, and wherein the computing formula of inlet valve flow velocity is:
Wherein, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration, V
meterflow velocity for effusion meter.
Second aspect present invention also provides a kind of device of controlling anesthetic machine air demand, and it comprises: storage device, for recording anesthetic machine target tidal volume; And accountant, for judging whether the flow velocity of effusion meter is zero; If the flow velocity of described effusion meter is zero, according to described target tidal volume, determine the closed degree of the inlet valve of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine.
The present invention also provides a kind of anesthetic machine, and it comprises the device of above-mentioned control anesthetic machine air demand.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a method of controlling anesthetic machine air demand, is characterized in that, comprising:
Record anesthetic machine target tidal volume;
Whether the flow velocity that judgement is arranged on the effusion meter on an air feed branch road is zero;
If the flow velocity of described effusion meter is zero, according to described target tidal volume, determine the closed degree that is arranged on the inlet valve on another air feed branch road of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine;
The closed degree of determining the inlet valve of described anesthetic machine according to described target tidal volume comprises: according to formula below, determine the flow velocity of described inlet valve,
Wherein, V
tfor tidal volume, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration;
The closed degree of determining the inlet valve of described anesthetic machine according to the flow velocity of described target tidal volume and described effusion meter comprises: according to formula below, determine the flow velocity of described inlet valve,
Wherein, V
tfor tidal volume, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration, V
meterflow velocity for effusion meter.
2. a device of controlling anesthetic machine air demand, is characterized in that, comprising:
Storage device, for recording anesthetic machine target tidal volume;
Accountant, whether the flow velocity that is arranged on the effusion meter on an air feed branch road for judging is zero; If the flow velocity of described effusion meter is zero, according to described target tidal volume, determine the closed degree that is arranged on the inlet valve on another air feed branch road of described anesthetic machine, if the flow velocity of described effusion meter is greater than zero, according to the flow velocity of described target tidal volume and described effusion meter, determine the closed degree of the inlet valve of described anesthetic machine;
The closed degree of determining the inlet valve of described anesthetic machine according to described target tidal volume comprises: according to formula below, determine the flow velocity of described inlet valve,
Wherein, V
tfor tidal volume, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration;
The closed degree of determining the inlet valve of described anesthetic machine according to the flow velocity of described target tidal volume and described effusion meter comprises: according to formula below, determine the flow velocity of described inlet valve,
Wherein, V
tfor tidal volume, Freq. is respiratory frequency, and I is inspiratory duration, and E is expiratory duration, T
pfor breath holding time accounts for the ratio of inspiratory duration, V
meterflow velocity for effusion meter.
3. an anesthetic machine, is characterized in that, comprises the device of control anesthetic machine air demand claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010620590.XA CN102266623B (en) | 2010-12-31 | 2010-12-31 | Method and device for controlling gas supply of anaesthesia machine and anaesthesia machine containing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010620590.XA CN102266623B (en) | 2010-12-31 | 2010-12-31 | Method and device for controlling gas supply of anaesthesia machine and anaesthesia machine containing device |
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| Publication Number | Publication Date |
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| CN102266623A CN102266623A (en) | 2011-12-07 |
| CN102266623B true CN102266623B (en) | 2014-10-01 |
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| CN201010620590.XA Active CN102266623B (en) | 2010-12-31 | 2010-12-31 | Method and device for controlling gas supply of anaesthesia machine and anaesthesia machine containing device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104069575A (en) * | 2013-03-29 | 2014-10-01 | 北京谊安医疗系统股份有限公司 | Small tidal volume ventilation control method of anesthesia machine or respirator |
| CN105983164B (en) * | 2016-04-21 | 2018-04-13 | 广州七喜医疗设备有限公司 | A kind of method for improving tidal volume control accuracy |
| CN107281601A (en) * | 2017-08-09 | 2017-10-24 | 王奕飞 | Suction-type Nitrous Oxide analgesia system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637385A (en) * | 1986-01-13 | 1987-01-20 | Tibor Rusz | Pulmonary ventilator controller |
| CN101301503A (en) * | 2008-06-26 | 2008-11-12 | 上海力申科学仪器有限公司 | Automatic calibration method of anesthesia apparatus tidal volume |
| CN101467880A (en) * | 2007-12-28 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Method for improving tidal volume control and detection accuracy by introducing R value for calculation |
| CN201346204Y (en) * | 2008-12-26 | 2009-11-18 | 上海力申科学仪器有限公司 | Tidal volume calibration system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081914A1 (en) * | 2009-01-19 | 2010-07-22 | Maquet Critical Care Ab | A device, an aggregate and a method for providing a gasified anesthetic agent |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637385A (en) * | 1986-01-13 | 1987-01-20 | Tibor Rusz | Pulmonary ventilator controller |
| CN101467880A (en) * | 2007-12-28 | 2009-07-01 | 北京谊安医疗系统股份有限公司 | Method for improving tidal volume control and detection accuracy by introducing R value for calculation |
| CN101301503A (en) * | 2008-06-26 | 2008-11-12 | 上海力申科学仪器有限公司 | Automatic calibration method of anesthesia apparatus tidal volume |
| CN201346204Y (en) * | 2008-12-26 | 2009-11-18 | 上海力申科学仪器有限公司 | Tidal volume calibration system |
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