Conjecture on reflectionlessness of blood-vascular system as a wave-conducting medium

Winter School on Continuous Media Mechanics

Goldobin, D.S.^1,2 ; Mizeva, I.A.^1

Institute of Continuous Media Mechanics UB RAS, 1 Akademika Koroleva street, Perm

614013, Russia^1

Department of Theoretical Physics, Perm State University, 15 Bukireva street, Perm

614990, Russia^2

关键词: Blood vascular systems;    Conducting medium;    General solutions;    Governing equations;    Inhomogeneous parameters;    Laser doppler flowmetry;    Photoplethysmography (PPG);    Vascular system;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/208/1/012015/pdf
DOI  :  10.1088/1757-899X/208/1/012015

来源: IOP

【 摘 要 】

Our research is related to the employment of photoplethysmography (PPG) and laser Doppler flowmetry (LDF) techniques (measuring the blood volume and flux, respectively) for the peripheral vascular system. We derive the governing equations of the wave dynamics for the case of extremely inhomogeneous parameters. We argue for the conjecture that the blood-vascular system as a wave-conducting medium should be nearly reflection-free. With the reflectionlessness condition, one can find the general solution to the governing equation and, on the basis of this solution, analyse the relationships between PPG- and LDF-signals.