Zaytsev Valeriy V, Miridonov Serguei V, Mamontov Oleg V, Kamshilin Alexei A
Department of Computer Photonics and Videomatics, ITMO University, 49 Kronverksky Pr., 197101 St. Petersburg, Russia.
Optics Department, Centro de Investigación Cientfica y de Educación Superior de Ensenada, 3918 Carretera Tijuana-Ensenada, 22860 Ensenada, Baja California, Mexico.
Biomed Opt Express. 2018 Oct 12;9(11):5387-5399. doi: 10.1364/BOE.9.005387. eCollection 2018 Nov 1.
Vasomotor reactivity, which is important to estimate neurogenic regulation of blood vessels in patients with different pathologies, is still assessed by occlusion plethysmography using sensors contacting the limbs. Recently we proposed a contactless approach for measuring blood flow changes during venous occlusion using imaging photoplethysmography [Kamshilin et al., Sci. Rep.7, 4642017]. In this work, the response of the vascular system on the occlusion was studied simultaneously by contact air-plethysmography system and remote optical system under illumination by incoherent polarized green light. A high correlation ( > 0.93) between the waveforms measured by both system was observed. Moreover, we found that the response of the optical system on the venous occlusion is uniform at the whole area of the forearm. The new optical technique is more convenient for assessment of the blood flow dynamics because it can be used for measurements in any part of the body. Method of imaging photoplethysmography is very promising for use in equipment intended for evaluation of neurogenic mechanisms of regulation of vascular blood flow.
血管运动反应对于评估不同病理状态患者血管的神经源性调节很重要，目前仍通过使用与肢体接触的传感器的肢体容积描记法进行评估。最近，我们提出了一种非接触式方法，利用成像光电容积描记法测量静脉阻塞期间的血流变化[Kamshilin等人，《科学报告》7，4642（2017年）]。在这项工作中，通过接触式空气容积描记系统和远程光学系统，在非相干偏振绿光照明下，同时研究了血管系统对阻塞的反应。观察到两个系统测量的波形之间具有高度相关性（>0.93）。此外，我们发现光学系统对静脉阻塞的反应在前臂的整个区域是均匀的。这种新的光学技术更便于评估血流动力学，因为它可用于身体任何部位的测量。成像光电容积描记法在用于评估血管血流调节神经机制的设备中具有很大的应用前景。
