Design and Development of Capillary Refilling Time Measuring Instrument Based
on Near-Infrared Spectrum and Photoelectric Plethysmography
CHEN Rui1, CHEN Ye2, GU Yuantao2, XIE Zhiyi1, WANG Zhong1
1. Tsinghua University Clinical Medical College, Changgeng Hospital, Tsinghua University, Beijing 100084, China;
2. Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Abstract：The peripheral circulation monitoring indexes, represented by capillary refilling time, can sensitively and accurately reflect the worst microcirculatory state of the body. However, its clinical application in recent years is limited by problems, such as human measurement bias. In this paper, a new mechanical measurement method was proposed for the measurement of peripheral circulation monitoring indexes such as capillary refilling time. Based on the Lambert-Beer law of photon absorption and the photoelectric plethysmography, the hemoglobin content in the arterial blood flow of the distal capillary bed was monitored continuously. Moreover, the electromagnetic pressure device was used to pressurize the distal capillary bed. Finally, the software system was used for signal processing and conversion, data storage and analysis, to obtain a series of peripheral circulation parameters , including capillary refilling time, to guide clinical diagnosis and treatment. The device makes the peripheral circulation monitoring more mechanized and standardized, and has the advantages of simple measurement and high accuracy.
陈瑞1，陈晔2，谷源涛2，谢志毅1，王仲1. 基于近红外光谱与光电容积脉搏波技术的毛细血管再充盈时间测量仪的设计与开发[J]. 中国医疗设备, 2019, 34(2): 28-30.
CHEN Rui1, CHEN Ye2, GU Yuantao2, XIE Zhiyi1, WANG Zhong1. Design and Development of Capillary Refilling Time Measuring Instrument Based
on Near-Infrared Spectrum and Photoelectric Plethysmography. China Medical Devices, 2019, 34(2): 28-30.
