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Hemolytic Differences among Artificial Cardiac Valves Used in a Ventricular Assist Pump
Author(s) -
Billy Gregory G.,
Miller Cynthia A.,
Pallone Michael N.,
Donachy James H.,
Pierce William S.
Publication year - 1995
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.1995.tb02338.x
Subject(s) - hemolysis , hematocrit , cardiac valve , ball valve , hemodynamics , cardiology , medicine , heart valve , engineering , mechanical engineering
Ventricular assist devices (VADs) required for cardiac support may produce clinically significant hemo‐lysis. VAD valves differ in both mechanics and hemody‐namics. Therefore, we examined a ball valve, a modified tilting disc (MTD) valve, a polyurethane trileaflet valve, and a Bjork‐Shiley monostrut valve to determine their degrees of hemolysis. The valves were tested in a Pierce‐Donachy VAD which pumped fresh bovine blood through a mock loop. Blood samples were analyzed for hemato‐crit and plasma hemoglobin, from which the indices of hemolysis were calculated. A one‐way analysis of variance indicated significant differences between certain valves. The MTD was the most hemolytic. No significant hemolytic difference was found between the trileaflet and monostrut valves despite their different designs. The monostrut valve and the MTD valve were hemolytically very different despite their similar design. This study suggests that the valve type significantly affects the hemolysis produced by the VAD.