CN108066874A - A kind of anesthesia respirator Inspiratory rise time adjusting method - Google Patents
A kind of anesthesia respirator Inspiratory rise time adjusting method Download PDFInfo
- Publication number
- CN108066874A CN108066874A CN201611010017.0A CN201611010017A CN108066874A CN 108066874 A CN108066874 A CN 108066874A CN 201611010017 A CN201611010017 A CN 201611010017A CN 108066874 A CN108066874 A CN 108066874A
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- CN
- China
- Prior art keywords
- rise time
- inspiratory
- upper limit
- coutroi velocity
- setting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0036—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the breathing tube and used in both inspiratory and expiratory phase
Abstract
A kind of anesthesia respirator Inspiratory rise time adjusting method, in control initial state, utilize R, C fast estimation techniques estimate the R of patient, C values, during air-breathing originates, according to formula F=Δ P/ (E*Tramp+R), F is calculated as mean flow rate in Inspiratory rise time, in inlet valve and outlet valve synergic adjustment system, it will be set as less than the upper limit coutroi velocity in setting inspiratory duration, actual flow of the timing measuring and calculating feedback valve output flow velocity in Inspiratory rise time, when Inspiratory rise time is in setting time, when valve output flow velocity is less than upper limit coutroi velocity F, valve output flow velocity is slowly promoted to upper limit coutroi velocity F.
Description
Technical field
The invention belongs to Medical Devices manufacturing technology fields, provide a kind of anesthesia respirator Inspiratory rise time adjusting side
Method.
Background technology
In Anesthesia machine and lung ventilator control, when being cooperated using suction control valve and exhalation control valve, due to air-breathing
Rise time is fixed, it is difficult to the effective adjusting for realizing Inspiratory rise time.
At present, there are mainly two types of the modes that Inspiratory rise time is adjusted on Anesthesia machine and lung ventilator：
1st, gas feed flow rate is adjusted using mechanical structure, realizes that Inspiratory rise time is adjusted.The advantages of this method is to control
Mechanism is simple, can readily realize pressure slope control.Shortcoming is that the method mechanical part degree of regulation is poor, it is impossible to very well
Guarantee the rise time precision；
2nd, flow control threshold velocity is adjusted using control algolithm, to ensure that Inspiratory rise time is adjusted.This method it is excellent
Point is to be realized using valve-gating technology by the method for software, hardware cost is low.Shortcoming is such method requirement feedback control
Cycle processed is very fast, and common microprocessor can not be completed well, be susceptible to pressure of inspiration(Pi) overshoot it is excessive, cause air pressure
Wound, and Inspiratory rise time control accuracy is not high, is restrained by feedback control.
The content of the invention
It is an object of the invention to be directed to cause the software adjustment rise time not due to hardware resource is limited in the prior art
The problem of good, proposes a kind of anesthesia respirator Inspiratory rise time adjusting method, using estimate R, C value calculate Inspiratory rise time
Required flow ensures the precision of Inspiratory rise time, eliminates the overshoot phenomenon occurred when pressure of inspiration(Pi) is adjusted.
Technical scheme is as follows：
A kind of anesthesia respirator Inspiratory rise time adjusting method, it is characterised in that：
(1) control initial state do not monitor patient's R, C value correctly in the case of, according to set pressure 50% into
The once tentative ventilation of row estimates R, C value of patient using R, C fast estimation technique during this period；
(2) during air-breathing originates, according to formula F=Δ P/ (E*Tramp+R), calculate in setting Inspiratory rise time
Required flow, wherein F are mean flow rate in Inspiratory rise time, and E is conductance, and Tramp is Inspiratory rise time, and R is vapour lock, E
=1/C, C are compliance；
It (3), will be less than the upper limit coutroi velocity in setting inspiratory duration in inlet valve and outlet valve synergic adjustment system
It is set as F；
(4) actual flow of the timing measuring and calculating feedback valve output flow velocity in Inspiratory rise time, works as Inspiratory rise time
In setting time, when the valve output flow velocity monitored is less than upper limit coutroi velocity F, using slow method for improving, by valve
Door output flow velocity is slowly promoted to upper limit coutroi velocity F；
(5) after Inspiratory rise time is more than the set rise time, inlet valve and outlet valve synergic adjustment system stream are removed
Fast upper limit control limitation, switchs to inlet valve and outlet valve collaboration pressure is adjusted.
Slow method for improving in the above method described in step (4), specifically：Reach suction in monitoring Inspiratory rise time
Before the 20% of gas rise time setting value, flow is slowly promoted to upper limit coutroi velocity F；Surpass in monitoring Inspiratory rise time
It crosses after the 20% of Inspiratory rise time setting value, constant current ventilation is carried out by upper limit coutroi velocity F.
Inspiratory rise time under the present invention controls pressure using the classical formulas in pneumodynamics principle is counted
It calculates, according to the control flow calculated, adjusts flow control valve and exported according to certain mode, to realize Inspiratory rise time
Adjusting, solve the problems, such as to cause the software adjustment rise time bad due to hardware resource is limited in the prior art, realize
It is used in Anesthesia machine and the control of lung ventilator pressure under flow control valve mode, using software to the accurate tune of Inspiratory rise time
Section.
Description of the drawings
Fig. 1 is the realization method block diagram of the present invention.
Specific embodiment
Fig. 1 is the realization method block diagram of the present invention, wherein：
100 open Anesthesia machine and lung ventilator, are at normally supplying working condition, initiation pressure control downslope slope
Adjusting control；
110, using Anesthesia machine and breathing built-in sensor, estimate patient's R, C value by R, C fast estimation technique；
120, according to formula F=Δ P/ (E*Tramp+R), calculate maximum output coutroi velocity in the set rise time；Its
Middle F is mean flow rate in Inspiratory rise time, and E is conductance, and Tramp is Inspiratory rise time, and R is vapour lock, and E=1/C, C are suitable
Ying Xing；
130 will be set to F less than the upper limit coutroi velocity in setting inspiratory duration, and reaching air-breathing in Inspiratory rise time rises
Before the 20% of time setting value, to upper limit coutroi velocity F using slow method for improving, flow is slowly promoted to upper limit control
Flow rate F；After 20% of Inspiratory rise time more than Inspiratory rise time setting value, valve positioner is exported into control flow
Upper limit coutroi velocity F is adjusted to, flow velocity PID control is carried out to valve according to upper limit coutroi velocity F；
140 after more than the set rise time, are controlled according to compress control method, to reach required pressure.
The specific implementation step of the present invention is as follows：
Step 1, control initial state do not monitor patient's R, C value correctly in the case of, according to set pressure 50%
Carrying out a test property is ventilated, and estimates R, C value of patient with R, C fast estimation technique during this period, and R is vapour lock, and C is to comply with
Property；
Step 2, during air-breathing originates, according to formula F=Δ P/ (E*Tramp+R), when calculating setting air-breathing and rising
Flow needed for interior, wherein F are mean flow rate in Inspiratory rise time, and E is conductance, and Tramp is Inspiratory rise time, and R is gas
Resistance, E=1/C, C are compliance；
Step 3, in inlet valve and outlet valve synergic adjustment system, will less than setting inspiratory duration in the upper limit control stream
Speed is set to F；
The actual flow of step 4, timing measuring and calculating feedback valve output flow velocity in Inspiratory rise time.It illustrates：When
Inspiratory rise time, which is in, to be set in the time, when the valve output flow velocity monitored is less than upper limit coutroi velocity F, passed through regulating valve
Door is opened, and by the slow promotion of valve output flow velocity to upper limit coutroi velocity F, concrete mode is as follows：
Before monitoring Inspiratory rise time reaches the 20% of Inspiratory rise time setting value, upper limit coutroi velocity F is adopted
With slow method for improving, flow is slowly promoted to upper limit coutroi velocity F, such as：Reach the 5% of setting time in the rise time
When, air-breathing coutroi velocity is set to the 25% of upper limit coutroi velocity F, when reaching the 10% of setting time in the rise time, will be inhaled
Gas coutroi velocity is set to the 50% of upper limit coutroi velocity F, when the rise time being more than or equal to the 20% of setting time, by air-breathing control
Flow velocity processed is set to upper limit coutroi velocity F；
Monitoring Inspiratory rise time be more than Inspiratory rise time setting value 20% after, by upper limit coutroi velocity F into
Row constant current is ventilated, and valve positioner is exported control flow is adjusted to upper limit coutroi velocity F, according to upper limit coutroi velocity F to valve
Carry out flow velocity PID control；
Step 5, after more than the set rise time, remove inlet valve and the outlet valve synergic adjustment system flow rate upper limit control
Limitation, switchs to inlet valve and outlet valve collaboration pressure is adjusted.
After the set rise time is reached, pressure ordinary circumstance can be smaller by 10% or so than setting pressure at this time, at this time will control
Device maximum flow rate control limitation removal processed is promoted residual compression to set pressure using pressure control, due at this time from setting
Pressure difference value is little, it is only necessary to supply a smaller flow and just can reach, therefore be not in pressure overshoot.
Claims (2)
1. a kind of anesthesia respirator Inspiratory rise time adjusting method, it is characterised in that：
(1) in the case where control initial state does not monitor patient's R, C value correctly, one is carried out according to the 50% of setting pressure
Secondary tentative ventilation estimates R, C value of patient using R, C fast estimation technique during this period；
(2) during air-breathing originates, according to formula F=Δ P/ (E*Tramp+R), calculate needed in setting Inspiratory rise time
Flow, wherein F are mean flow rate in Inspiratory rise time, and E is conductance, and Tramp is Inspiratory rise time, and R is vapour lock, E=1/
C, C are compliance；
(3) in inlet valve and outlet valve synergic adjustment system, will be set less than the upper limit coutroi velocity in setting inspiratory duration
For F；
(4) actual flow of the timing measuring and calculating feedback valve output flow velocity in Inspiratory rise time, when Inspiratory rise time is in
In setting time, when the valve output flow velocity monitored is less than upper limit coutroi velocity F, reach air-breathing in monitoring Inspiratory rise time
Before the 20% of rise time setting value, flow is slowly promoted to upper limit coutroi velocity F；It is more than in monitoring Inspiratory rise time
After the 20% of Inspiratory rise time setting value, constant current ventilation is carried out by upper limit coutroi velocity F；
(5) after Inspiratory rise time is more than the set rise time, remove in inlet valve and outlet valve synergic adjustment system flow rate
Limit control limitation, switchs to inlet valve and outlet valve collaboration pressure is adjusted.
2. anesthesia respirator Inspiratory rise time adjusting method according to claim 1, it is characterised in that：When air-breathing rises
When time reaches the 5% of setting time, air-breathing coutroi velocity is set to the 25% of upper limit coutroi velocity F, is reached in the rise time
Setting time 10% when, air-breathing coutroi velocity is set to the 50% of upper limit coutroi velocity F, the rise time be more than or equal to setting
Time 20% when, air-breathing coutroi velocity is set to upper limit coutroi velocity F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611010017.0A CN108066874A (en) | 2016-11-16 | 2016-11-16 | A kind of anesthesia respirator Inspiratory rise time adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611010017.0A CN108066874A (en) | 2016-11-16 | 2016-11-16 | A kind of anesthesia respirator Inspiratory rise time adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN108066874A true CN108066874A (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611010017.0A Pending CN108066874A (en) | 2016-11-16 | 2016-11-16 | A kind of anesthesia respirator Inspiratory rise time adjusting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235302A (en) * | 2021-11-16 | 2022-03-25 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
-
2016
- 2016-11-16 CN CN201611010017.0A patent/CN108066874A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235302A (en) * | 2021-11-16 | 2022-03-25 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
| CN114235302B (en) * | 2021-11-16 | 2024-02-06 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180525 |
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| WD01 | Invention patent application deemed withdrawn after publication |