Compliance compensation capacity guarantee method for life support equipment in autonomous time control mode

A technology of time control and life support, which is applied in the direction of pharmaceutical equipment, other medical equipment, respirators, etc., can solve problems such as unstable tidal volume control, and achieve the goals of solving unstable tidal volume control, avoiding injuries, and improving control accuracy Effect

Pending Publication Date: 2022-02-08
CHINA CHANGFENG SCI TECH IND GROUPCORP
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of unstable tidal volume control in the control of existing ventilators and anesthesia machines, and propose a compliance compensation capacity guarantee method under the autonomous time control mode, improve tidal volume control accuracy, and reduce overshoot in tidal volume adjustment occurrence of phenomenon

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  • Compliance compensation capacity guarantee method for life support equipment in autonomous time control mode

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specific Embodiment approach

[0014] figure 1 It is a method flowchart of the present invention, and the specific implementation is as follows:

[0015] (1) Start the capacity guarantee control, use the RC rapid estimation technology, start the circuit compliance self-test for the connecting circuit between the ventilator and the anesthesia machine; use the formula Vtube(t)=P(t)-P(t-1) *Ctube calculates the instantaneous tube compliance, where Vtube(t) is the tube capacity at time t, P(t) is the pressure at the patient end monitored at time t, and P(t-1) is the pressure at the patient end at the previous moment; Use the formula Vt(t)=Vs(t)-Vtube(t) to calculate the instantaneous patient inhalation capacity, where Vt(t) is the patient inhalation capacity at time t, and Vs(t) is the output capacity of the ventilator and anesthesia machine system at time t ;

[0016] (2) According to the real-time monitoring of Vt(t) value in step (1), compare Vt(t) with the set tidal volume VTset, when the monitored Vt(t) ...

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Abstract

The invention relates to a compliance compensation capacity guarantee method for life support equipment in an autonomous time control mode, which comprises the following steps of: firstly, calculating the inhalation capacity Vt (t) of a patient at a moment t, comparing the inhalation capacity Vt (t) with a set tidal volume VTset, switching a control system into a breath-holding control state when the Vt (t) is greater than or equal to the VTset, in the breath-holding control state, adopting a cooperative working method of the inspiration control valve and the expiration control valve, and releasing the capacity exceeding the VTset part; after the expiration time is up, monitoring the expiration flow speed, calculating the expiration tidal volume of the system, calculating the difference value between the expiration tidal volume and a set value, compensating the part lower than the set tidal volume through feedback, and avoiding weakening of the part exceeding the set tidal volume. According to the invention, the tidal volume control precision can be improved, the problem of unstable tidal volume control in the control of a breathing machine and an anaesthesia machine is solved, and the harm to a human body caused by overlarge tidal volume in an adjusting process is avoided.

Description

technical field [0001] The invention belongs to the technical field of medical equipment manufacturing, and relates to a compliance compensation capacity guarantee method under the autonomous time control mode of life support equipment, which is mainly used to ensure the accuracy of tidal volume inhaled by patients under the capacity control of ventilators and anesthesia machines, and improve capacity ventilation under security. Background technique [0002] In ventilator and anesthesia machine control, volume control usually takes the monitored tidal volume of the previous cycle as the feedback control parameter of this tidal volume, and substitutes it into the system for feedback control, usually using the formula VT=ΔV*(C-Ctube) / C To calculate the tidal volume of the patient, where VT is the inhaled tidal volume of the patient, ΔV is the tidal volume change, C is the overall compliance of the system, and Ctube is the compliance of the pipeline; the calculated VT is brough...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/00A61M16/01A61M16/20
CPCA61M16/00A61M16/01A61M16/202A61M2016/003A61M2205/3334
Inventor 王春华刁俊魏瑞丽
Owner CHINA CHANGFENG SCI TECH IND GROUPCORP
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