The research and design of non-invasive cardiac output detector based on pulse graph theory.
- Author:
Shanzhu LI
1
;
Xun ZHANG
Author Information
1. Inst. of Electronic Information, Hangzhou Electronic and Science University, China. smartchristine@163.com
- Publication Type:Journal Article
- MeSH:
Cardiac Output;
Monitoring, Physiologic;
instrumentation;
methods;
Pulse
- From:
Chinese Journal of Medical Instrumentation
2011;35(5):344-347
- CountryChina
- Language:Chinese
-
Abstract:
This cardiac output detector uses AT89C52 as the core MCU, carries the pulse signal sampling from pulse sensor into the SCM after A/D conversion, and then figures out the cardiac output value and displays it on the LED. Software analysis works out the cardiac output value through five-point difference threshold for feature location of the pulse graph method theory. Experiment results show that the normal measured cardiac output is 5.411 L/min, the standard deviation of 0.873, while the catheter method as the gold standard of the mean 5.51 L/min, the standard deviation of 1.09. This system can meet the testing requirements of normal cardiac output. It is a non-invasive, convenient and new cardiac output measurement instrument with continuous testing, easy operation and low cost.
