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Monitoring method of value R and value C of anesthesia apparatus and respirator

A ventilator, anesthesia machine technology, applied in ventilators, diagnostic recording/measurement, medical science, etc., can solve the problems of low accuracy, inability to apply multiple ventilation algorithms, large limitations, etc., and achieve the effect of high estimation accuracy

Active Publication Date: 2013-05-01
航天长峰医疗科技(成都)有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

R and C values ​​can be calculated by this method, but the accuracy is not high, and it can only be calculated in the VCV control mode with breath-hold function, which has great limitations and cannot be applied to various ventilation algorithms

Method used

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  • Monitoring method of value R and value C of anesthesia apparatus and respirator

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Embodiment Construction

[0016] Such as figure 1 Shown, the monitoring method of a kind of anesthesia machine of the present invention, respirator R value C value comprises the steps:

[0017] Step 1: During the inspiratory phase of each respiratory cycle of the patient, collect the values ​​of the gas supply volume V, pressure P, and flow rate F in real time at regular time intervals, and transmit the collected data to the controller CPU;

[0018] Step 2: According to the values ​​of volume V(t), pressure P(t) and flow velocity F(t) collected at a certain time t, and the volume V(t+1) and pressure P( t+1), the value of flow velocity F(t+1), the approximate R value C value is calculated by the controller CPU, and the calculation method is as follows:

[0019] R=(V(t)*P(t+1)-V(t+1)*P(t)) / (F(t+1)*V(t)-F(t)*V(t+ 1));

[0020] C=(V(t+1)*F(t)-V(t)*F(t+1)) / (F(t)*P(t+1)-F(t+1)*P( t));

[0021] The above calculation method is derived as follows:

[0022] Transform the known formula for calculating the p...

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Abstract

The invention relates to a monitoring method of a value R and a value C of an anesthesia apparatus and a respirator. The method comprises the following steps of in the respiration stage of each respiration cycle of a patient, collecting the values of air supply volume V, pressure P and flow speed F of the time in a real-time way at certain time intervals, and transmitting the collected data to a CPU (central processing unit) of a controller; according to the collected values of volume V (t), pressure P (t) and flow speed F (t) at certain time t, and the collected values of volume V (t+1), pressure P (t+1) and flow speed F (t+1) at the next time (t+1), calculating approximate values of the value R and the value C through the CPU of the controller, transmitting the calculated approximate values of the value R and the value C into a Kalman estimation controller to estimate, and classifying and storing the estimating results into a storage unit of a controller according to the values; and after the respiration stage of the cycle is finished, solving the normal distribution of a plurality of stored value R and value C samples, and respectively calculating the average values of the value R and the value C with widest normal distribution as the results of the value R and the value C.

Description

technical field [0001] The invention is used in anesthesia machines and ventilators to quickly monitor the parameters of airway dynamic air resistance (R value) and lung dynamic compliance (C value) of patients, and belongs to the technical field of medical equipment manufacturing. Background technique [0002] In the control of anesthesia machine and ventilator, it is necessary to monitor the patient's various signs. By correctly monitoring the patient's airway air resistance (R value) and patient lung compliance (C value), the anesthesia machine and the anesthesia machine can be effectively adjusted and controlled. The ventilator ventilation method is suitable for various situations under different signs, and reduces the complications caused by patients using anesthesia machines and ventilators. Usually, air resistance is calculated by monitoring peak inspiratory pressure Ppeak, airway plateau pressure Pplat, and peak flow velocity ΔF, using the formula R=ΔP / ΔF, where ΔP=P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M16/01A61M16/00A61B5/085
Inventor 刁俊
Owner 航天长峰医疗科技(成都)有限公司
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