無創(chuàng)連續(xù)心輸出量分析算法研究與軟件設(shè)計
[Abstract]:Cardiac output is one of the key parameters in hemodynamics. At present, the main clinical cardiac output method is invasive, the minimally invasive method is undergoing clinical verification, but for the normal patients and healthy people, the non-invasive method has a better application value. The existing noninvasive methods have some problems such as complex operation, expensive operation, poor stability of anti-jamming gas, and so on. Therefore, it is of great significance to study a non-invasive, continuous, portable and low-cost cardiac output monitor. The main work of this paper is: 1. A non-invasive continuous cardiac output algorithm based on photovolumic pulse wave (PPG) signal is proposed. The attenuation constant RCis calculated by PPG, and the relationship between arterial compliance and pulse wave conduction time is obtained. The peripheral resistance R is obtained to calculate cardiac output, and it is named KC algorithm. According to the non-invasive cardiac output algorithm, a non-invasive cardiac output monitoring software is designed for real-time monitoring of cardiac output and other hemodynamic parameters. And it can be used to verify and modify the algorithm. 3, to verify the algorithm, to verify the feasibility of the algorithm from 10 segments of five clinical patients and to verify the non-invasive algorithm of 2 segments of data, so that the output of the operation center changes greatly. The experimental results of the non-invasive scheme are in good agreement with the experimental curves of Flotrac-Vigileo monitor. The KC algorithm proposed in this paper does not depend on the principle of statistics and can accurately reflect the change trend of cardiac output. There is no need for population statistical parameters to reflect the changing trend of cardiac output. The developed measuring instrument system has good individual adaptability. Compared with the invasive method, the non-invasive monitoring method based on photovolumic pulse wave can be applied to the monitoring of healthy people and mild patients more widely than that of the invasive method. It has the advantage of application and popularization.
【學位授予單位】:浙江大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TH789;R54
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