A Novel Method for Endothelial Function Assessment and Its System Design

In this paper, we discuss the development of an easy-to-use non-intrusive endothelial function assessment instrument. The instrument records the digital pulse volume (DPV) from the fingers. We studied 31 subjects (22 men and 9 women, 22 to 78 years of age) and showed the good performance of self-developed system for monitoring endothelial function. The system is capable to apply both area under the curve of DPV and traditional amplitude methods for endothelial function assessment. Both methods are highly correlated as well as able to reflect the changes of blood flow volume in reactive hyperemia. At home, only a few minutes are needed for conducting a self endothelial function assessment Therefore, early self-monitoring of cardiovascular dysfunction and arterial stiffness can be easily and effectively achieved.