期刊
SENSORS
卷 20, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/s20051388
关键词
capillary refill time; plastic optical fibre; photoplethysmography; fibre bragg grating; contact pressure
资金
- EPSRC Impact Acceleration Award [EP/K503800/1]
- Hermes Innovation award
- University of Nottingham
- Electronic and Computer Engineering, University of Umm Al-Qura, Al-Abdiah, Makkah, Saudi Arabia
The widely applied capillary refill time (CRT) measurement is currently performed by manually applying pressure and using a stopwatch to record the time taken for the skin to recover its normal colour after a blanching pressure is applied. This method is highly subjective and observer-dependent. This paper presents a new, integrated optical sensor probe, combining monitoring of the capillary refilling process with the blanching pressure applied. The sensor consists of an optical fibre-based reflectance photoplethysmography (PPG) sensor to measure the reflected light signal, as well as a fibre Bragg grating (FBG) to measure the applied blanching pressure and to indicate the time when pressure is released. This sensor was applied to calculate the CRT (1.38 +/- 0.66 s) of 10 healthy adult volunteers with (55.2 +/- 21.8 kPa) blanching pressures. The form of the capillary refilling data was investigated by fitting using an exponential regression model (R-2 > 0.96). The integrated probe has the potential to improve the reliability of CRT measurements by standardising the optimum duration and magnitude of the pressure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据