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High-reliability anesthesia respirator ventilation-pressure control algorithm

A pressure control and ventilator technology, applied in respirator and other directions, can solve the problems of unstable bias flow and slow establishment of positive end-expiratory pressure, and achieve the effect of ensuring accuracy and stability

Inactive Publication Date: 2019-05-21
BEIJING AEROSPACE CHANGFENG CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the positive end-expiratory pressure build-up time is slow and the bias flow is unstable at certain limit points when the inhalation valve and the exhalation valve are used in the control of anesthesia machine and ventilator to work together, the present invention proposes a flow rate The method of pressure control of anesthesia machine and ventilator by sensor is used to solve the above problems, so as to improve the reliability of the algorithm and further improve the comfort of patients

Method used

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Embodiment Construction

[0012] Concrete implementation steps of the present invention are as follows:

[0013] Step 1. Use the exhalation flow monitoring sensor installed at the exhalation port of the exhalation valve to monitor the exhalation flow;

[0014] Step 2. Establish a closed-loop PID flow control system for the exhalation valve and the exhalation flow monitoring sensor;

[0015] Step 3. Classify the PID control parameters for the exhalation valve control flow. The classification range is from 1LPM to 300LPM according to the required points of interest. The PID control parameters under the value are fitted;

[0016] Step 4. According to the formula P=F*R, calculate the output flow controlled by the inhalation valve and the output flow controlled by the exhalation valve under the set control pressure, where P is the set pressure, F is the flow rate, and R is the known air resistance;

[0017] Step 5. According to the output flow controlled by the inhalation valve and the output flow control...

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Abstract

The invention relates to a high-reliability anesthesia respirator ventilation-pressure control algorithm. The algorithm comprises the following steps: an expiratory flow monitoring sensor installed byan exhalation valve port is used to monitor the expiratory flow; a closed loop PID flow control system is established for the exhalation valve and the expiratory flow monitoring sensor; the exhalation valve control flow PID control parameters are classified, and after classifying, a curve fitting method or a broken line approximation can be used to fit the PID control parameters under each flow value in the focus point; the output flow of an inlet valve and the output flow of the exhalation valve under the set control pressure can be calculated; and according to the output flow of the inlet valve and the output flow of the exhalation valve, a cooperation control mode of the inlet valve and the exhalation valve is employed to perform pressure feedback control on an anesthesia machine and arespirator.

Description

technical field [0001] The invention relates to a high-performance and high-precision pressure control ventilation mode for realizing anesthesia machines and ventilators, and belongs to the technical field of medical equipment manufacturing. Background technique [0002] In the control of anesthesia machines and ventilators, pressure-controlled ventilation is required for some special patients. Among the current pressure control methods, one method is to use the inhalation control valve and the exhalation control valve to work together to complete the pressure establishment and pressure balance under the pressure control of the anesthesia machine and the ventilator. This method improves the comfort of the patient. The required pressure can be well controlled. However, this method also has its disadvantages. When the positive end-expiratory pressure is established, the establishment time of the positive end-expiratory pressure is relatively long when the positive end-expirat...

Claims

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Application Information

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IPC IPC(8): A61M16/00A61M16/01A61M16/20
Inventor 刁俊
Owner BEIJING AEROSPACE CHANGFENG CO LTD
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