Method for controlling inspiration ascent time of anesthesia machine and respirator

Abstract

The invention relates to a method for controlling the inspiration ascent time of an anesthesia machine and a respirator. The method includes the following steps of: (1) estimating the air resistance (R) value and the compliance (C) value of a patient by using an R and C rapid estimation technology in a control starting state; (2) calculating an average flow rate F in an inspiration ascent time according to a formula F=Delta P / (E*Tramp+R) in an inspiration starting process; (3) setting an upper limit control flow rate in a time which is less than a set inspiration time as F in an inspiration valve and expiration valve cooperative adjustment system; (4) regularly measuring the actual flow of a feedback valve output flow rate in the inspiration ascent time, and slowly increasing the valve output flow rate to the upper limit control flow rate F when the inspiration ascent time is in the set time and the valve output flow rate is less than the upper limit control flow rate F; and (5) eliminating limitation on flow rate upper limit control of the inspiration valve and expiration valve cooperative adjustment system, and switching to inspiration valve and expiration valve cooperative pressure adjustment after the inspiration ascent time surpasses the set ascent time.

Description

technical field [0001] The present invention provides a new method for solving the slope adjustment control of the anesthesia machine and ventilator under pressure control. The inspiratory rise time is adjusted according to the preset time to adjust the slope, so that precise pressure slope control can be realized. The invention belongs to the technical field of medical equipment manufacturing. Background technique [0002] In the control of anesthesia machines and ventilators, when the inspiratory control valve and the exhalation control valve are used to work together, it is difficult to effectively adjust the inspiratory rise time because the inspiratory rise time is fixed. [0003] At present, there are two main ways to adjust the inspiratory rise time on anesthesia machines and ventilators: [0004] 1. Use the mechanical structure to adjust the flow rate of the air supply to realize the adjustment of the inhalation rise time. The advantage of this method is that the c...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of poor software adjustment rise time due to limited hardware resources in the prior art, and propose a method for controlling the inspiratory rise time of an anesthesia ventilator, which uses estimated R and C values ​​to calculate the inspiratory rise time The required flow rate is used to ensure the accuracy of the inspiratory rise time, and to eliminate the overshoot phenomenon that occurs when the inspiratory pressure is adjusted

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