CN106512166B - The setting method and device of anesthesia apparatus tidal volume - Google Patents

The setting method and device of anesthesia apparatus tidal volume Download PDF

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Publication number
CN106512166B
CN106512166B CN201611255282.5A CN201611255282A CN106512166B CN 106512166 B CN106512166 B CN 106512166B CN 201611255282 A CN201611255282 A CN 201611255282A CN 106512166 B CN106512166 B CN 106512166B
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gas
molecular mass
tidal volume
mixed gas
target
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CN106512166A (en
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刘东敏
姚尚龙
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Shenzhen Pubo Medical Technology Co.,Ltd.
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SHENZHEN POOPLE SCIENCE AND TECHNOLOGY Co Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/01Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/104Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/12Preparation of respiratory gases or vapours by mixing different gases
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3331Pressure; Flow
    • A61M2205/3334Measuring or controlling the flow rate

Abstract

The invention discloses a kind of setting method of anesthesia apparatus tidal volume and devices, this method comprises: obtaining the actual flow velocity of mixed gas in circuit by flow sensor, and the ingredient of the mixed gas is obtained by flowmeter, the concentration of each gas in the mixed gas is determined according to the ingredient of the mixed gas and the type of the flowmeter, according to the concentration of each gas, the relative molecular mass of each gas calculates the average molecular mass of the mixed gas, and according to the average molecular mass, the target tidal volume, the relative molecular mass of the inspiratory duration and marked gas calculates the target flow rate of the mixed gas, the actual flow velocity is adjusted to the target flow rate, and tidal volume is exported according to the target flow rate, so that the tidal volume of output is extremely close to target tidal volume, it avoids in the prior art due to flow sensor transmission flow letter Number inaccuracy, and caused by output tidal volume substantial deviation target tidal volume the case where, and then be beneficial to the health of patient.

Description

The setting method and device of anesthesia apparatus tidal volume
Technical field
The invention belongs to medical instruments field more particularly to the setting methods and device of a kind of anesthesia apparatus tidal volume.
Background technique
Anesthesia machine is that arcotic gas is sent into the alveolar of patient by mechanical circuit using principle, forms arcotic gas Body partial pressure, after permeating into blood, inhibiting effect directly occurs for Central nervous system, to generate the effect of general anesthesia.Fiber crops Liquor-saturated machine belongs to anesthesia,semiopen device, mainly by flow sensor, anesthetic vaporizer, flowmeter, collapsible bellows ventilator, The components compositions such as breathing circuit (containing suction, expiration unidirectional valve and manual gasbag), ripple pipeline.Anesthesia machine used at present is The parameters such as breathing gas flow, tidal volume and minute ventilation are monitored by the flow signal of flow sensor transmission, therefore The accuracy of flow sensor directly affects the monitoring and control precision of Anesthesia machine.
In the prior art, Anesthesia machine manufacturer generallys use a kind of gas (such as air or oxygen) and carrys out calibrational capacity biography Sensor.However in Anesthesia machine use process, the tidal volume for being supplied to patient is generally formed by several gas mixings, the gaseous mixture Including two or more in air, oxygen, laughing gas (or other anaesthetic gases) in body.Since gas type and concentration can convection current The flow detection of quantity sensor has an impact, and the flow signal inaccuracy for causing flow sensor to transmit in turn results in practical defeated Tidal volume out deviates target tidal volume, brings danger to patient.
Summary of the invention
The present invention provides the setting method and device of a kind of anesthesia apparatus tidal volume, it is intended to solve because of step counting in the prior art Method is easy the interference by external factor or can not calculate the inaccuracy of step counting caused by paces according to motion state Problem.
The setting method of a kind of anesthesia apparatus tidal volume provided by the invention, comprising: obtain target tide depending on the user's operation Tolerance and inspiratory duration;The actual flow velocity of mixed gas in circuit is obtained by flow sensor, and institute is obtained by flowmeter The ingredient for stating mixed gas determines each in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter The concentration of gas;The flat of the mixed gas is calculated according to the relative molecular mass of the concentration of each gas, each gas Equal relative molecular mass, and according to the average molecular mass, the target tidal volume, the inspiratory duration and calibration gas The relative molecular mass of body calculates the target flow rate of the mixed gas;The actual flow velocity is adjusted to the target flow rate, And tidal volume is exported according to the target flow rate.
The setting device of a kind of anesthesia apparatus tidal volume provided by the invention, comprising: module is obtained, for the behaviour according to user Make to obtain target tidal volume and inspiratory duration;Monitoring modular, for obtaining the reality of mixed gas in circuit by flow sensor Border flow velocity, and obtain by flowmeter the ingredient of the mixed gas;Computing module, for the ingredient according to the mixed gas The concentration of each gas in the mixed gas is determined with the type of the flowmeter;The computing module, is also used to according to The concentration of each gas, each gas relative molecular mass calculate the average molecular mass of the mixed gas, and root According to the average molecular mass, the target tidal volume, the inspiratory duration and marked gas relative molecular mass meter Calculate the target flow rate of the mixed gas;Control module, for the actual flow velocity to be adjusted to the target flow rate, and foundation The target flow rate exports tidal volume.
The setting method and device of anesthesia apparatus tidal volume provided by the invention obtain target tidal volume depending on the user's operation And inspiratory duration, the actual flow velocity of mixed gas in circuit is obtained by flow sensor, and the mixing is obtained by flowmeter The ingredient of gas determines the concentration of each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter, The average molecular mass of the mixed gas is calculated according to the relative molecular mass of the concentration of each gas, each gas, and Being calculated according to the relative molecular mass of the average molecular mass, the target tidal volume, the inspiratory duration and marked gas should The actual flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate by the target flow rate of mixed gas, this Sample is according to the ingredient of practical mixed gas and the tidal volume of the concentration adjustment reality output of each gas, so that the tidal volume pole of output Its close to target tidal volume, avoid in the prior art due to flow sensor transmission flow signal inaccuracy, and caused by it is defeated The case where tidal volume substantial deviation target tidal volume out so that the tidal volume of output meet patient needed for target tidal volume, And then it is beneficial to the health of patient.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention.
Fig. 1 is the implementation process schematic diagram of the setting method for the anesthesia apparatus tidal volume that first embodiment of the invention provides;
Fig. 2 is the implementation process schematic diagram of the setting method for the anesthesia apparatus tidal volume that second embodiment of the invention provides;
Fig. 3 is the structural schematic diagram of the setting device for the anesthesia apparatus tidal volume that third embodiment of the invention provides;
Fig. 4 is the structural schematic diagram of the setting device for the anesthesia apparatus tidal volume that fourth embodiment of the invention provides.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the implementation process for the setting method that Fig. 1 provides anesthesia apparatus tidal volume for first embodiment of the invention is shown It is intended to, can be applied in the anesthesia outfit that anesthesia function is provided, such as Anesthesia machine, the setting side of anesthesia apparatus tidal volume shown in FIG. 1 Method mainly comprises the steps that
S101, target tidal volume and inspiratory duration are obtained depending on the user's operation.
The target tidal volume and inspiratory duration are that user is manually entered into anesthesia outfit, which is patient institute The tidal volume needed.
S102, the actual flow velocity that mixed gas in circuit is obtained by flow sensor, and this is obtained by flowmeter and is mixed The ingredient for closing gas determines the dense of each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter Degree.
The ingredient of the mixed gas includes: two or more of combinations in oxygen, air, laughing gas and other anesthetic gases (in addition possible there are also other anesthetic gases from anesthetic vaporizer on a small quantity, because its content is less, it is possible to ignore), wherein It must include oxygen in the mixed gas.The flowmeter can be divided into electronic flowmeter and mechanical meters two types, wherein electricity The applicable mixed gas of subflow meter is two or more gas, and the applicable mixed gas of mechanical meters is two kinds Gas.
S103, the average phase that the mixed gas is calculated according to the concentration of each gas, the relative molecular mass of each gas To molecular mass, and according to opposite point of the average molecular mass, the target tidal volume, the inspiratory duration and marked gas Protonatomic mass calculates the target flow rate of the mixed gas.
The relative molecular mass of gas is determined by the ingredient of gas, and in other words, the ingredient for getting gas can To know the relative molecular mass of gas, such as the relative molecular mass of oxygen is 32, and the relative molecular mass of laughing gas is 44, empty The relative molecular mass approximation value of gas is 29.The relative molecular mass of the marked gas and marked gas is known quantity, the mark Determining gas can be air, oxygen or a kind of any other gas applied in anesthesia outfit.
Optionally, the corresponding relationship between the relative molecular mass of various types of gas and various types of gas is stored in advance In memory, after the ingredient for obtaining mixed gas by flowmeter, obtained according to the ingredient of gas each in mixed gas The relative molecular mass of the gas stored in memory is also opposite comprising marked gas and marked gas in certain memory Molecular mass.
S104, the actual flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate.
Tidal volume is related with the flow velocity of mixed gas in circuit and inspiratory duration, the corresponding air-breathing of the tidal volume exported here The inspiratory duration obtained depending on the user's operation in time and step S101 is identical.
In the embodiment of the present invention, target tidal volume and inspiratory duration are obtained depending on the user's operation;Pass through flow sensor The actual flow velocity of mixed gas in circuit is obtained, and obtains the ingredient of the mixed gas by flowmeter, according to the mixed gas Ingredient and the type of the flowmeter determine the concentration of each gas in the mixed gas;According to the concentration of each gas, each gas The relative molecular mass of body calculates the average molecular mass of the mixed gas, and according to the average molecular mass, should The relative molecular mass of target tidal volume, the inspiratory duration and marked gas calculates the target flow rate of the mixed gas, by the reality Border flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate, in this way according to the ingredient of practical mixed gas And the tidal volume of the concentration adjustment reality output of each gas, so that the tidal volume of output avoids extremely close to target tidal volume In the prior art due to flow sensor transmission flow signal inaccuracy, and caused by output tidal volume substantial deviation target tide The case where tolerance so that the tidal volume of output meet patient needed for target tidal volume, and then be beneficial to the health of patient.
Referring to Fig. 2, Fig. 2 is the implementation process of the setting method for the anesthesia apparatus tidal volume that second embodiment of the invention provides Schematic diagram can be applied in the anesthesia outfit for providing anesthesia function, such as Anesthesia machine, the setting of anesthesia apparatus tidal volume shown in Fig. 2 Method mainly comprises the steps that
S201, target tidal volume and inspiratory duration are obtained depending on the user's operation.
The target tidal volume and inspiratory duration are that user is manually entered into anesthesia outfit, which is patient institute The tidal volume needed.
S202, the actual flow velocity that mixed gas in circuit is obtained by flow sensor, and this is obtained by flowmeter and is mixed The ingredient for closing gas determines the dense of each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter Degree.
The ingredient of the mixed gas includes: two or more of combinations in oxygen, air, laughing gas and other anesthetic gases (in addition possible there are also other anesthetic gases from anesthetic vaporizer on a small quantity, because its content is less, it is possible to ignore), wherein It must include oxygen in the mixed gas.The flowmeter can be divided into electronic flowmeter and mechanical meters two types, wherein electricity The applicable mixed gas of subflow meter is two or more gas, and the applicable mixed gas of mechanical meters is two kinds Gas.
Further, the type according to the ingredient of the mixed gas He the flowmeter determines each gas in the mixed gas Concentration specifically:
If the flow is calculated as electronic flowmeter, the flow velocity of each gas is obtained by the electronic flowmeter, and according to this The concentration of the flow relocity calculation of each gas each gas;
If the flow is calculated as mechanical meters, the concentration of oxygen in the mixed gas is obtained by lambda sensor, and according to According to the concentration of the gas in the concentration calculation of the oxygen mixed gas in addition to oxygen.
Anesthesia outfit equipped with electronic flowmeter can obtain the ingredient of the mixed gas and being somebody's turn to do for the mixed gas automatically The flow velocity of each gas, and the densimeter for the oxygen that the anesthesia outfit equipped with mechanical meters needs to obtain by lambda sensor in circuit Calculate the concentration of the gas in the mixed gas in addition to oxygen.
For example, when the flow is calculated as electronic flowmeter, if gas there are three types of total in mixed gas, three kinds of gases Flow velocity is respectively as follows: F3, F4 and F5, then according to the concentration of the flow relocity calculation of each gas each gas specifically: η 3=F3/F Always;η 4=F4/F is total;η 5=F5/F is total;Wherein F it is total=F3+F4+F5.
For example, when the flow is calculated as mechanical meters, if sharing two kinds of gases in mixed gas, two kinds of gases Flow velocity is divided into: F6 and F7, wherein it is assumed that F6 is oxygen, the concentration η 6 of F6 is obtained by lambda sensor in circuit, then according to oxygen The concentration calculation mixed gas in gas in addition to oxygen concentration are as follows: η 7=100%- η 6.
S203, the average phase that the mixed gas is calculated according to the concentration of each gas, the relative molecular mass of each gas To molecular mass, and according to opposite point of the average molecular mass, the target tidal volume, the inspiratory duration and marked gas Protonatomic mass calculates the target flow rate of the mixed gas.
The relative molecular mass of gas is determined by the ingredient of gas, and in other words, the ingredient for getting gas can To know the relative molecular mass of gas, such as the relative molecular mass of oxygen is 32, and the relative molecular mass of laughing gas is 44, empty The relative molecular mass approximation value of gas is 29.The relative molecular mass of the marked gas and marked gas is known quantity, the mark Determining gas can be air, oxygen or a kind of any other gas applied in anesthesia outfit.
Optionally, the corresponding relationship between the relative molecular mass of various types of gas and various types of gas is stored in advance In memory, after the ingredient for obtaining mixed gas by flowmeter, obtained according to the ingredient of gas each in mixed gas The relative molecular mass of the gas stored in memory is also opposite comprising marked gas and marked gas in certain memory Molecular mass.
Further, the flat of the mixed gas is calculated according to the relative molecular mass of the concentration of each gas, each gas Equal relative molecular mass specifically:
The concentration of each gas is multiplied with the relative molecular mass of each gas, and by the results added after multiplication, is obtained To the average molecular mass of the mixed gas.
Premised on illustrating in above-mentioned steps S202, illustrate the process for the average molecular mass for calculating the mixed gas It is as follows:
Electronic flowmeter situation, the concentration difference for each gas that above-mentioned steps S202 is calculated are calculated as in the flow first Are as follows: η 3, η 4 and η 5.Since the ingredient of mixed gas has been got by electronic flowmeter, then each gas can be known Relative molecular mass is respectively as follows: M3, M4 and M5.The concentration of each gas and the relative molecular mass of each gas is mutually multiplied To result be respectively as follows: M3* η 3, M4* η 4 and M5* η 5, and the results added after multiplication is obtained into being averaged for the mixed gas Relative molecular mass MFlat 1=(M3* η 3)+(M4* η 4)+(M5* η 5).
In actual scene, if including three kinds of oxygen, laughing gas and air gas in the mixed gas of electronic flowmeter acquisition Body, then the relative molecular mass M3 of oxygen is 32;The relative molecular mass M4 of laughing gas is 44;The relative molecular mass M5 of air is Take approximation 29.
Secondly, in the case where the flow is calculated as mechanical meters, the concentration for each gas that above-mentioned steps S202 is calculated It is respectively as follows: η 6 and η 7, since the ingredient of mixed gas has been got by mechanical meters, then can knows each gas Relative molecular mass is respectively as follows: M6 and M7.The concentration of each gas is multiplied with the relative molecular mass of each gas As a result it is respectively as follows: M6* η 6 and M7* η 7, and the results added after multiplication is obtained into the averagemolecular wt matter of the mixed gas Measure MFlat 2=(M6* η 6)+(M7* η 7).
In actual scene, if including two kinds of gases of oxygen and laughing gas, oxygen in the mixed gas of mechanical meters acquisition The relative molecular mass M6 of gas is 32, and the relative molecular mass M7 of laughing gas is 44;If in the mixed gas of mechanical meters acquisition Comprising two kinds of gases of oxygen and air, then the relative molecular mass M6 of oxygen is 32, and the relative molecular mass of nitrogen is 28.
What needs to be explained here is that when flow is calculated as mechanical meters, if mixed gas is by air and two kinds of oxygen Gas composition, then can be approximately considered mixed gas only includes two kinds of gases of oxygen and nitrogen, can be with the average molecular of nitrogen Quality is 28 to carry out operations, and above-mentioned steps S202 need to calculate the concentration of nitrogen when calculating concentration at this time, i.e., the concentration of nitrogen= The concentration of 100%- oxygen.
Further, according to the average molecular mass, the target tidal volume, the phase of the inspiratory duration and marked gas The target flow rate of the mixed gas is calculated molecular mass specifically:
According to formula F1=V1*K1/ t, and according to the average molecular mass, the target tidal volume, the inspiratory duration and The relative molecular mass of marked gas calculates the target flow rate, wherein F1For the target flow rate, V1For the target tidal volume, t is The inspiratory duration, K1=M1/M0, M1For the average molecular mass, M0For the relative molecular mass of the marked gas.
Here the average molecular mass M of mixed gas1It can M to be calculated in the above-mentioned example of valueFlat 1And MFlat 2
S204, the actual flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate.
Tidal volume is related with the flow velocity of mixed gas in circuit and inspiratory duration, the corresponding air-breathing of the tidal volume exported here The inspiratory duration obtained depending on the user's operation in time and step S201 is identical.
Optionally, which is adjusted to the target flow rate, and exports tidal volume according to the target flow rate, later also Include:
The currently practical flow velocity of the mixed gas is obtained by the flow sensor;
The tidal volume is calculated according to the current actual flow velocity, wherein calculating the formula of the tidal volume are as follows: V2=F2*K2/ t, Middle V2For the tidal volume, F2For the current actual flow velocity and F2=F1, t is the inspiratory duration, K=M0/M1, M1It is average opposite for this Molecular mass, M0For the relative molecular mass of the marked gas;
The tidal volume calculated by display display.
Similarly, in step S204 mixed gas average molecular mass M1It can M to be calculated in the above-mentioned example of valueFlat 1 And MFlat 2.The target tidal volume extremely obtained close to step S201 by the tidal volume that display is shown.
It should be noted that the present invention is identical as target flow rate by adjusting actual flow velocity, so that anesthesia outfit output Tidal volume can be identical as target tidal volume, but this be it is theoretic identical, in practical applications, due to external environmental factor (for example, the factors such as ambient atmosphere pressure, temperature and humidity), the tidal volume and target tidal volume of output are unequal, but phase Compared with the prior art, the tidal volume exported in the setting method of anesthesia apparatus tidal volume provided by the invention is extremely close to target tide Tolerance achievees the effect that target tidal volume needed for meeting patient.
In the embodiment of the present invention, target tidal volume and inspiratory duration are obtained depending on the user's operation;Pass through flow sensor The actual flow velocity of mixed gas in circuit is obtained, and obtains the ingredient of the mixed gas by flowmeter, according to the mixed gas Ingredient and the type of the flowmeter determine the concentration of each gas in the mixed gas;According to the concentration of each gas, each gas The relative molecular mass of body calculates the average molecular mass of the mixed gas, and according to the average molecular mass, should The relative molecular mass of target tidal volume, the inspiratory duration and marked gas calculates the target flow rate of the mixed gas, by the reality Border flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate, in this way according to the ingredient of practical mixed gas And the tidal volume of the concentration adjustment reality output of each gas, so that the tidal volume of output avoids extremely close to target tidal volume In the prior art due to flow sensor transmission flow signal inaccuracy, and caused by output tidal volume substantial deviation target tide The case where tolerance so that the tidal volume of output meet patient needed for target tidal volume, and then be beneficial to the health of patient.
Referring to Fig. 3, Fig. 3 is the structural representation of the setting device for the anesthesia apparatus tidal volume that third embodiment of the invention provides Figure, for ease of description, only parts related to embodiments of the present invention are shown.The setting of the exemplary anesthesia apparatus tidal volume of Fig. 3 Device can be the executing subject of the setting method for the anesthesia apparatus tidal volume that earlier figures 1 and embodiment illustrated in fig. 2 provide.Fig. 3 shows The setting device of the anesthesia apparatus tidal volume of example specifically includes that and obtains module 301, monitoring modular 302, computing module 303 and control Module 304.Detailed description are as follows for above each functional module:
Module 301 is obtained, for obtaining target tidal volume and inspiratory duration depending on the user's operation;
Monitoring modular 302 for obtaining the actual flow velocity of mixed gas in circuit by flow sensor, and passes through flow Meter obtains the ingredient of the mixed gas;
Computing module 303, the type for ingredient and the flowmeter according to the mixed gas determine in the mixed gas The concentration of each gas;
Computing module 303 is also used to the concentration according to each gas, the relative molecular mass of each gas calculates the mixing The average molecular mass of gas, and according to the average molecular mass, the target tidal volume, the inspiratory duration and calibration The relative molecular mass of gas calculates the target flow rate of the mixed gas;
Control module 304 for the actual flow velocity to be adjusted to the target flow rate, and exports moisture according to the target flow rate Amount.
The ingredient of the mixed gas includes: two or more of combinations in oxygen, air, laughing gas and other anesthetic gases (in addition possible there are also other anesthetic gases from anesthetic vaporizer on a small quantity, because its content is less, it is possible to ignore), wherein It must include oxygen in the mixed gas.The flowmeter can be divided into electronic flowmeter and mechanical meters two types, wherein electricity The applicable mixed gas of subflow meter is two or more gas, and the applicable mixed gas of mechanical meters is two kinds Gas.
The relative molecular mass of gas is determined by the ingredient of gas, and in other words, the ingredient for getting gas can To know the relative molecular mass of gas, such as the relative molecular mass of oxygen is 32, and the relative molecular mass of laughing gas is 44, empty The relative molecular mass approximation value of gas is 29.The relative molecular mass of the marked gas and marked gas is known quantity, the mark Determining gas can be air, oxygen or a kind of any other gas applied to device provided in an embodiment of the present invention.
Optionally, which further includes memory (not shown), in advance by various types of gas and various types of gas Relative molecular mass between corresponding relationship be stored in the memory, monitoring modular 302 obtain mixed gas ingredient Later, the relative molecular mass of the gas stored in the memory is obtained according to the ingredient of gas each in mixed gas, certainly should It also include the relative molecular mass of marked gas and marked gas in memory.
Tidal volume is related with the flow velocity of mixed gas in circuit and inspiratory duration, the corresponding air-breathing of the tidal volume exported here Time is identical as the inspiratory duration that module 301 obtains is obtained.
The details of the present embodiment not to the greatest extent, please refers to the description of aforementioned embodiment illustrated in fig. 1, details are not described herein again.
It should be noted that in the embodiment of the setting device of the exemplary anesthesia apparatus tidal volume of figure 3 above, each function mould The division of block is merely illustrative of, and can according to need in practical application, such as the configuration requirement or software of corresponding hardware The convenient of realization considers, and above-mentioned function distribution is completed by different functional modules, i.e., by the internal junction of image processing apparatus Structure is divided into different functional modules, to complete all or part of the functions described above.Moreover, in practical application, this reality Applying the corresponding functional module in example can be by corresponding hardware realization, can also execute corresponding software by corresponding hardware It completes.Each embodiment that this specification provides can all apply foregoing description principle, repeat no more below.
In the embodiment of the present invention, obtains module 301 and obtain target tidal volume and inspiratory duration depending on the user's operation, monitor Module 302 obtains the actual flow velocity of mixed gas in circuit by flow sensor, and obtains the mixed gas by flowmeter Ingredient, computing module 303 determines each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter Concentration, which calculates the mixed gas according to the concentration of each gas, the relative molecular mass of each gas Average molecular mass, and according to the average molecular mass, the target tidal volume, the inspiratory duration and marked gas Relative molecular mass calculates the target flow rate of the mixed gas, which is adjusted to the target flow rate by control module 304, And tidal volume is exported according to the target flow rate, it is practical defeated according to the adjustment of the concentration of the ingredient of practical mixed gas and each gas in this way Tidal volume out, so that the tidal volume of output avoids in the prior art extremely close to target tidal volume due to flow sensor Transmit flow signal inaccuracy, and caused by output tidal volume substantial deviation target tidal volume the case where so that output tide Target tidal volume needed for tolerance meets patient, and then it is beneficial to the health of patient.
Referring to Fig. 4, Fig. 4 is the structural representation of the setting device for the anesthesia apparatus tidal volume that fourth embodiment of the invention provides Figure, for ease of description, only parts related to embodiments of the present invention are shown.The setting of the exemplary anesthesia apparatus tidal volume of Fig. 4 Device can be the executing subject of the setting method for the anesthesia apparatus tidal volume that earlier figures 1 and embodiment illustrated in fig. 2 provide.Fig. 4 shows The setting device of the anesthesia apparatus tidal volume of example specifically includes that and obtains module 401, monitoring modular 402, computing module 403, control Module 404 and display module 405.Detailed description are as follows for above each functional module:
Module 401 is obtained, for obtaining target tidal volume and inspiratory duration depending on the user's operation.
Monitoring modular 402 for obtaining the actual flow velocity of mixed gas in circuit by flow sensor, and passes through flow Meter obtains the ingredient of the mixed gas.
Computing module 403, the type for ingredient and the flowmeter according to the mixed gas determine in the mixed gas The concentration of each gas.
The ingredient of the mixed gas includes: two or more of combinations in oxygen, air, laughing gas and other anesthetic gases (in addition possible there are also other anesthetic gases from anesthetic vaporizer on a small quantity, because its content is less, it is possible to ignore), wherein It must include oxygen in the mixed gas.The flowmeter can be divided into electronic flowmeter and mechanical meters two types, wherein electricity The applicable mixed gas of subflow meter is two or more gas, and the applicable mixed gas of mechanical meters is two kinds Gas.
Further, the monitoring modular 402 passes through the electronic flow if being also used to the flow is calculated as electronic flowmeter Meter obtains the flow velocity of each gas;And the computing module 403, it is also used to according to the flow relocity calculation of each gas each gas Concentration;
Further, the monitoring modular 402 is obtained if being also used to the flow is calculated as mechanical meters by lambda sensor Take the concentration of oxygen in the mixed gas;And the computing module 403, it is also used to according to the concentration calculation of the oxygen gaseous mixture The concentration of gas in body in addition to oxygen.
Device provided in an embodiment of the present invention equipped with electronic flowmeter can obtain automatically the mixed gas ingredient and The flow velocity of each gas of the mixed gas, and the needs of the device provided in an embodiment of the present invention equipped with mechanical meters pass through back The concentration of gas in road in the concentration calculation of oxygen of the lambda sensor acquisition mixed gas in addition to oxygen.
For example, when the flow is calculated as electronic flowmeter, if gas there are three types of total in mixed gas, three kinds of gases Flow velocity is respectively as follows: F3, F4 and F5, then computing module 403 according to the flow relocity calculation of each gas each gas concentration it is specific Are as follows: η 3=F3/F is total;η 4=F4/F is total;η 5=F5/F is total;Wherein F it is total=F3+F4+F5.
For example, when the flow is calculated as mechanical meters, if sharing two kinds of gases in mixed gas, two kinds of gases Flow velocity is divided into: F6 and F7, wherein it is assumed that F6 is oxygen, monitoring modular 402 obtains the concentration η 6 of F6 by lambda sensor in circuit, Then concentration of the computing module 403 according to the gas in the concentration calculation of the oxygen mixed gas in addition to oxygen are as follows: η 7= 100%- η 6.
Computing module 403 is also used to the concentration according to each gas, the relative molecular mass of each gas calculates the mixing The average molecular mass of gas, and according to the average molecular mass, the target tidal volume, the inspiratory duration and calibration The relative molecular mass of gas calculates the target flow rate of the mixed gas.
The relative molecular mass of gas is determined by the ingredient of gas, and in other words, the ingredient for getting gas can To know the relative molecular mass of gas, such as the relative molecular mass of oxygen is 32, and the relative molecular mass of laughing gas is 44, empty The relative molecular mass approximation value of gas is 29.The relative molecular mass of the marked gas and marked gas is known quantity, the mark Determining gas can be air, oxygen or a kind of any other gas applied in device provided in an embodiment of the present invention.
Optionally, which further includes memory (not shown), in advance by various types of gas and various types of gas Relative molecular mass between corresponding relationship be stored in memory, monitoring modular 402 obtain mixed gas at point it Afterwards, the relative molecular mass of the gas stored in memory, certain storage are obtained according to the ingredient of gas each in mixed gas It also include the relative molecular mass of marked gas and marked gas in device.
Further, the computing module 403 is also used to the relative molecular mass of the concentration of each gas and each gas It is multiplied, and by the results added after multiplication, obtains the average molecular mass of the mixed gas.
It is exemplified as premise with above-mentioned, illustrates that the process for the average molecular mass for calculating the mixed gas is as follows:
Electronic flowmeter situation, the concentration point for each gas that above-mentioned computing module 403 calculates are calculated as in the flow first Not are as follows: η 3, η 4 and η 5.Since the ingredient of mixed gas has been got by electronic flowmeter, then monitoring modular 402 can obtain The relative molecular mass for knowing each gas, is respectively as follows: M3, M4 and M5.Computing module 403 is by the concentration of each gas and each gas The result that the relative molecular mass of body is multiplied is respectively as follows: M3* η 3, M4* η 4 and M5* η 5, and by the result phase after multiplication Add the average molecular mass M for obtaining the mixed gasFlat 1=(M3* η 3)+(M4* η 4)+(M5* η5)。
In actual scene, if including three kinds of oxygen, laughing gas and air gas in the mixed gas of electronic flowmeter acquisition Body, then the relative molecular mass M3 of oxygen is 32;The relative molecular mass M4 of laughing gas is 44;The relative molecular mass M5 of air is Take approximation 29.
Secondly, in the case where the flow is calculated as mechanical meters, each gas that above-mentioned computing module 403 calculates it is dense Degree is respectively as follows: η 6 and η 7, and since the ingredient of mixed gas has been got by mechanical meters, then monitoring modular 402 can be with The relative molecular mass for knowing each gas, is respectively as follows: M6 and M7.Computing module 403 is by the concentration of each gas and each gas The result that the relative molecular mass of body is multiplied is respectively as follows: M6* η 6 and M7* η 7, and the results added after multiplication is obtained The average molecular mass M of the mixed gasFlat 2=(M6* η 6)+(M7* η 7).
In actual scene, if including two kinds of gases of oxygen and laughing gas, oxygen in the mixed gas of mechanical meters acquisition The relative molecular mass M6 of gas is 32, and the relative molecular mass M7 of laughing gas is 44;If in the mixed gas of mechanical meters acquisition Comprising two kinds of gases of oxygen and air, then the relative molecular mass M6 of oxygen is 32, and the relative molecular mass of nitrogen is 28.
What needs to be explained here is that when flow is calculated as mechanical meters, if mixed gas by air and oxygen, can Include two kinds of gases of oxygen and nitrogen to be approximately considered mixed gas only, be 28 progress operations with the relative molecular mass of nitrogen, Computing module 403 need to calculate the concentration of nitrogen, the i.e. concentration of nitrogen=100%- oxygen concentration when calculating concentration at this time.
Further, computing module 403 are also used to according to formula F1=V1*K1/ t, and according to the averagemolecular wt matter Amount, the target tidal volume, the inspiratory duration and marked gas relative molecular mass, calculate the target flow rate, wherein F1For this Target flow rate, V1For the target tidal volume, t is the inspiratory duration, K1=M1/M0, M1For the average molecular mass, M0For this The relative molecular mass of marked gas.
Here the average molecular mass M of mixed gas1It can M to be calculated in the above-mentioned example of valueFlat 1And MFlat 2
Control module 404 for the actual flow velocity to be adjusted to the target flow rate, and exports moisture according to the target flow rate Amount.
Tidal volume is related with the flow velocity of mixed gas in circuit and inspiratory duration, the corresponding air-breathing of the tidal volume exported here Time is identical as the inspiratory duration that module 401 obtains depending on the user's operation is obtained.
Optionally, device further include: display module 405;
Monitoring modular 402 is also used to obtain the currently practical flow velocity of the mixed gas by the flow sensor;
Computing module 403 is also used to calculate the tidal volume according to the current actual flow velocity, wherein calculating the public affairs of the tidal volume Formula are as follows: V2=F2*K2/ t, wherein V2For the tidal volume, F2For the current actual flow velocity and F2=F1, t is the inspiratory duration, K= M0/M1, M1For the average molecular mass, M0For the relative molecular mass of the marked gas;
Display module 405, for showing the tidal volume calculated.
Similarly, the average molecular mass M of mixed gas in the formula of the tidal volume is calculated1It can be with the above-mentioned example of value The M of middle calculatingFlat 1And MFlat 2.The target tidal volume that the tidal volume that display module 405 is shown extremely is obtained close to step S201.
The details of the present embodiment not to the greatest extent, please refers to the description of earlier figures 1 and embodiment illustrated in fig. 2, details are not described herein again.
In the embodiment of the present invention, obtains module 401 and obtain target tidal volume and inspiratory duration depending on the user's operation, monitor Module 402 obtains the actual flow velocity of mixed gas in circuit by flow sensor, and obtains the mixed gas by flowmeter Ingredient, computing module 403 determines each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter Concentration, which calculates the mixed gas according to the concentration of each gas, the relative molecular mass of each gas Average molecular mass, and according to the average molecular mass, the target tidal volume, the inspiratory duration and marked gas Relative molecular mass calculates the target flow rate of the mixed gas, control module 404, for the actual flow velocity to be adjusted to the target Flow velocity, and tidal volume is exported according to the target flow rate, in this way according to the adjustment of the concentration of the ingredient of practical mixed gas and each gas The tidal volume of reality output, so that the tidal volume of output avoids in the prior art extremely close to target tidal volume due to flow Sensor transmit flow signal inaccuracy, and caused by output tidal volume substantial deviation target tidal volume the case where so that defeated Target tidal volume needed for tidal volume out meets patient, and then it is beneficial to the health of patient.
Fifth embodiment of the invention provides Anesthesia machine, which includes: flow sensor, flowmeter, one or more A processor and memory execute the fiber crops in above-mentioned any means embodiment when being executed by one or more processor The setting method of liquor-saturated machine tidal volume.
In multiple embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the module It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple module or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling or direct-coupling or communication linkage discussed can be through some interfaces, the indirect coupling of device or module Conjunction or communication linkage can be electrical property, mechanical or other forms.
The module as illustrated by the separation member may or may not be physically separated, aobvious as module The component shown may or may not be physical module, it can and it is in one place, or may be distributed over multiple On network module.Some or all of the modules therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
It, can also be in addition, each functional module in each embodiment of the present invention can integrate in a processing module It is that modules physically exist alone, can also be integrated in two or more modules in a module.Above-mentioned integrated mould Block both can take the form of hardware realization, can also be realized in the form of software function module.
If the integrated module is realized in the form of software function module and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey The medium of sequence code.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because According to the present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know It knows, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not all be this hair Necessary to bright.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment Point, it may refer to the associated description of other embodiments.
The above are the descriptions of setting method and device to anesthesia apparatus tidal volume provided by the present invention, for this field Technical staff, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, comprehensive On, the contents of this specification are not to be construed as limiting the invention.

Claims (10)

1. a kind of setting method of anesthesia apparatus tidal volume characterized by comprising
Target tidal volume and inspiratory duration are obtained depending on the user's operation;
The actual flow velocity of mixed gas in circuit is obtained by flow sensor, and the mixed gas is obtained by flowmeter Ingredient determines the concentration of each gas in the mixed gas according to the ingredient of the mixed gas and the type of the flowmeter;
Average opposite point of the mixed gas is calculated according to the relative molecular mass of the concentration of each gas, each gas Protonatomic mass, and according to the opposite of the average molecular mass, the target tidal volume, the inspiratory duration and marked gas Molecular mass calculates the target flow rate of the mixed gas;
The actual flow velocity is adjusted to the target flow rate, and exports tidal volume according to the target flow rate.
2. the method according to claim 1, wherein the ingredient and the flow according to the mixed gas The type of meter determines that the concentration of each gas in the mixed gas includes:
If the flow is calculated as electronic flowmeter, the flow velocity of each gas, and foundation are obtained by the electronic flowmeter The concentration of each gas described in the flow relocity calculation of each gas;
If the flow is calculated as mechanical meters, the concentration of oxygen in the mixed gas is obtained by lambda sensor, and according to The concentration of gas in mixed gas described in concentration calculation according to oxygen in addition to oxygen.
3. according to the method described in claim 2, it is characterized in that, the concentration according to each gas, each gas Relative molecular mass calculate the average molecular mass of the mixed gas and include:
The concentration of each gas is multiplied with the relative molecular mass of each gas, and by the results added after multiplication, is obtained To the average molecular mass of the mixed gas.
4. according to the method described in claim 3, it is characterized in that, described according to the average molecular mass, the mesh Mark tidal volume, the inspiratory duration and marked gas relative molecular mass calculate the target flow rate of the mixed gas and include:
According to formula F1=V1*K1/ t calculates the target flow rate, wherein F1For the target flow rate, V1For the target moisture Amount, t are the inspiratory duration, K1=M1/M0, M1For the average molecular mass, M0It is opposite point of the marked gas Protonatomic mass.
5. according to the method described in claim 4, it is characterized in that, described be adjusted to the target stream for the actual flow velocity Speed, and according to the target flow rate export tidal volume after further include:
The currently practical flow velocity of the mixed gas is obtained by the flow sensor;
According to tidal volume described in the currently practical flow relocity calculation, wherein calculating the formula of the tidal volume are as follows: V2=F2*K2/ t, Wherein V2For the tidal volume, F2For the currently practical flow velocity and F2=F1, t is the inspiratory duration, K=M0/M1, M1For institute State average molecular mass, M0For the relative molecular mass of the marked gas;
The tidal volume calculated by display display.
6. a kind of setting device of anesthesia apparatus tidal volume, which is characterized in that described device includes:
Module is obtained, for obtaining target tidal volume and inspiratory duration depending on the user's operation;
Monitoring modular is obtained for obtaining the actual flow velocity of mixed gas in circuit by flow sensor, and by flowmeter The ingredient of the mixed gas;
Computing module, the type for ingredient and the flowmeter according to the mixed gas determine each in the mixed gas The concentration of gas;
The computing module is also used to according to the calculating of the relative molecular mass of the concentration of each gas, each gas The average molecular mass of mixed gas, and according to the average molecular mass, the target tidal volume, the air-breathing The relative molecular mass of time and marked gas calculates the target flow rate of the mixed gas;
Control module for the actual flow velocity to be adjusted to the target flow rate, and exports moisture according to the target flow rate Amount.
7. device according to claim 6, which is characterized in that
The monitoring modular, if being also used to the flow is calculated as electronic flowmeter, by described in electronic flowmeter acquisition The flow velocity of each gas;
And the computing module, it is also used to the concentration of each gas described in the flow relocity calculation according to each gas;
The monitoring modular obtains the gaseous mixture by lambda sensor if being also used to the flow is calculated as mechanical meters The concentration of oxygen in body;
And the computing module, it is also used to the gas in mixed gas described in the concentration calculation according to oxygen in addition to oxygen Concentration.
8. device according to claim 7, which is characterized in that
The computing module is also used to for the concentration of each gas being multiplied with the relative molecular mass of each gas, and will Results added after multiplication obtains the average molecular mass of the mixed gas.
9. device according to claim 8, which is characterized in that
The computing module is also used to according to formula F1=V1*K1/ t, and according to the average molecular mass, the target The relative molecular mass of tidal volume, the inspiratory duration and marked gas calculates the target flow rate, wherein F1For the target Flow velocity, V1For the target tidal volume, t is the inspiratory duration, K1=M1/M0, M1For the average molecular mass, M0For The relative molecular mass of the marked gas.
10. device according to claim 9, which is characterized in that
The monitoring modular is also used to obtain the currently practical flow velocity of the mixed gas by the flow sensor;
The computing module is also used to according to tidal volume described in the currently practical flow relocity calculation, wherein calculating the tidal volume Formula are as follows: V2=F2*K2/ t, wherein V2For the tidal volume, F2For the currently practical flow velocity and F2=F1, t is the suction Gas time, K=M0/M1, M1For the average molecular mass, M0For the relative molecular mass of the marked gas;
Described device further include:
Display module, for showing the tidal volume calculated.
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