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High-precision anesthesia respirator pressure control method

A pressure control and ventilator technology, applied in the direction of respirators, etc., can solve problems such as pressure rise and achieve the effect of improving comfort

Inactive Publication Date: 2019-05-21
BEIJING AEROSPACE CHANGFENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of pressure increase caused by the outside world after the air supply flow rate of the anesthesia machine and the ventilator drops to 0 LPM during pressure control, the present invention provides an anesthesia ventilator pressure controlled by an inspiratory valve and an exhalation valve. Control method to resolve the pressure rise caused by controlling the flow rate to zero

Method used

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Examples

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Embodiment Construction

[0015] Concrete implementation of the present invention is as follows:

[0016] In the pressure control mode, the traditional flow pressure cooperative fuzzy control method is used to perform flow rate estimation fuzzy control on the suction valve pressure;

[0017] Use the pressure sensor to monitor the pressure change in the system, transmit the pressure change in the system to the exhalation valve control unit, and calculate the control deviation of the exhalation valve;

[0018] The exhalation valve uses a pressure sensor to perform PID control on the set inspiratory pressure during the inhalation process, and performs PID control on the positive end-expiratory pressure during the exhalation process;

[0019] Classify the PID control parameters of the exhalation valve. The classification range is from 1cmH2O to 80cmH2O according to the required points of interest. make a fit;

[0020] By fine-tuning the PID control parameters of the inspiratory valve and the exhalation v...

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Abstract

The invention relates to a high-precision anesthesia respirator pressure control method. According to the invention, flow speed estimation fuzzy control is carried out over the pressure of an inspiration valve; a pressure sensor is used for monitoring change conditions of the pressure in a monitoring system, the change conditions of the pressure in the system are transmitted to an inspiration valve control unit, and the control deviation of the expiration valve is calculated; in the inspiration process, the expiration valve uses the pressure sensor to conduct PID control on set inspiration pressure and conduct PID control on positive end expiratory pressure; PID control parameters of the expiration valve are graded, wherein grading is conducted according to required focus points in the range of 1 cm H2O-80 cm H2O; after grading, fitting is conducted on the PID control parameters under pressures in the focus points through a curve fitting method or a broken line approximation method, and the inspiration valve and the expiration valve are controlled at the same time in the control process.

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. There are three known pressure control methods: [0003] The pressure PID control is used to directly control the pressure of the patient. The advantage of this method is that the algorithm is simple to implement, and the PID pressure control realized by using a high-performance processor can be used for most patients with special diseases. The disadvantage is that for patients with different lesions, their own R and C values ​​are different. Using the traditional pressure control method to control the entire system based solely on the monitored pressure cannot well adapt to pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00A61M16/10A61M16/01A61M16/20
Inventor 刁俊
Owner BEIJING AEROSPACE CHANGFENG CO LTD
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