The hemolytic characteristics of monopivot magnetic suspension blood pumps with washout holes.
The hemolytic characteristics of monopivot magnetic suspension blood pumps as a function of impeller washout hole configuration and female pivot shape are observed. The pump impellers are designed with three washout hole configurations for blood circulation, and four female pivot shapes to reduce blood stagnation and to enhance antithrombogenicity. The hemolytic characteristics of the monopivot pumps were observed to be better than those of a currently available commercial centrifugal blood pump, BP-80, and changed to be nearly equal when the female pivot shape was changed. This indicates that hemolysis in monopivot pumps is mainly caused by shear stress between the male and female pivots.
Maruyama
Osamu
O
National Institute of AIST, Institute for Human Science and Biomedical Engineering, Namiki 1-2, Tsukuba, Ibaraki 305-8564, Japan. osamu.maruyama@aist.go.jp
Nishida
Masahiro
M
Tsutsui
Tatsuo
T
Jikuya
Tomoaki
T
Yamane
Takashi
T
D000818:Animals; D002417:Cattle; D002498:Centrifugation / Q000295:instrumentation*; D004867:Equipment Design; D006353:Heart-Assist Devices; D006461:Hemolysis; D018056:Hemorheology; D008280:Magnetics; D008422:Materials Testing