title: Effect of viscosity on the wave propagation: Experimental determination of compression and expansion pulse wave velocity in fluid-fill elastic tube.
abstract: The velocity by which the disturbance travels through the medium is the wave velocity. Pulse wave velocity is one of the main parameters in hemodynamics. The study of wave propagation through the fluid-fill elastic tube is of great importance for the proper biophysical understanding of the nature of blood flow through of cardiovascular system. The effect of viscosity on the pulse wave velocity is generally ignored. In this paper we present the results of experimental measurements of pulse wave velocity (PWV) of compression and expansion waves in elastic tube. The solutions with different density and viscosity were used in the experiment. Biophysical model of the circulatory flow is designed to perform measurements. Experimental results show that the PWV of the expansion waves is higher than the compression waves during the same experimental conditions. It was found that the change in viscosity causes a change of PWV for both waves. We found a relationship between PWV, fluid density and viscosity.
authors.affiliation: Biophysics Institute, School of Medicine, Belgrade University, 11000 Belgrade, Serbia.
authors.forename: Bojana
authors.initials: B
authors.lastname: Stojadinović
authors.affiliation: Raphael Recanati Genetic Institute, Beilinson Hospital, Petah Tikva, Israel.
authors.forename: Tamar
authors.initials: T
authors.lastname: Tenne
authors.affiliation: Ella Institute for Melanoma Treatment and Research, Sheba Medical Center, Tel Hashomer, Israel.
authors.forename: Dragoslav
authors.initials: D
authors.lastname: Zikich
authors.affiliation: Biophysics Institute, School of Medicine, Belgrade University, 11000 Belgrade, Serbia.
authors.forename: Nemanja
authors.initials: N
authors.lastname: Rajković
authors.affiliation: Biophysics Institute, School of Medicine, Belgrade University, 11000 Belgrade, Serbia.
authors.forename: Nebojša
authors.initials: N
authors.lastname: Milošević
authors.affiliation: Clinic of Internal Medicine, Pulmonology Department, University Clinical Hospital Center Zemun, Belgrade, Serbia.
authors.forename: Biljana
authors.initials: B
authors.lastname: Lazović
authors.affiliation: Biophysics Institute, School of Medicine, Belgrade University, 11000 Belgrade, Serbia. Electronic address: dzikic@gmail.com.
authors.forename: Dejan
authors.initials: D
authors.lastname: Žikić
mesh_terms: D055592:Biophysical Phenomena; D001775:Blood Circulation / Q000502:physiology*; D006439:Hemodynamics; D011312:Pressure; D063177:Pulse Wave Analysis; D014783:Viscosity
keywords: Compression wave; Expansion wave; Hemodynamics; Pulse wave velocity; Viscosity