Open AccessMathematical evaluation of hemolysis in a channel centrifugal blood pump
Author(s) -
А. П. Кулешов,
Г. П. Иткин,
А. С. Бучнев,
А. А. Дробышев
Publication year - 2020
Publication title -
vestnik transplantologii i iskusstvennyh organov
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.137
H-Index - 5
eISSN - 2412-6160
pISSN - 1995-1191
DOI - 10.15825/1995-1191-2020-3-79-85
Subject(s) - impeller , hemolysis , centrifugal pump , shear stress , mechanics , blood flow , volumetric flow rate , materials science , pressure drop , physics , medicine , cardiology
The objective of this work is to conduct research on a mathematical model to assess hemolytic characteristics in a channel centrifugal blood pump developed by us with 2000–3400 rpm impeller speed range and 100–250 mmHg pressure drop in different parts of the pump flow path. Hemolysis index was measured at 1 to 10 L/min flow rate. The result was an estimate of the average magnitude of the shear stress (SS), taking into account the distribution in the pump, which ranged from 40 to 60 Pa. The most critical areas of the pump in terms of blood injury were evaluated. The maximum SSs were determined: 456 Pa in the impeller wheel zone and 533.3 Pa in the adjacent area of the body, with an exposure time of 0.0115 s and 0.0821 s respectively. In these zones, maximum hemolysis index values were 0.0420 and 0.0744 respectively. Based on the data obtained, these zones were optimized in terms of minimizing hemolysis.