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Basic Performance of a Miniature Intraventricular Axial Pump
Author(s) -
Umezu Mitsuo,
Ohtake Yasuo,
Sakata Koji,
Fujimoto Tetsuo,
Yamazaki Kenji,
Koyanagi Hitoshi,
Iiyama Haruo,
Mori Toshio,
Higuchi Kenji
Publication year - 1996
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.1525-1594.1996.tb04504.x
Subject(s) - progressive cavity pump , clockwise , ascending aorta , rotation (mathematics) , mechanics , axial piston pump , contraction (grammar) , head (geology) , aorta , physics , materials science , cardiology , medicine , mathematics , variable displacement pump , geometry , geology , radial piston pump , geomorphology
A miniature intraventricular axial pump for left ventricular (LV) support is under development. This pump was designed for placement in the LV cavity by insertion through the LV apex with the outlet located at the ascending aorta via the aortic valve. The basic hydro‐dynamic characteristics represented as a relationship between pump head (H) and flow (Q) showed a negative linear relationship under a constant head. This characteristic was generally the same as that obtained by other axial rotation pumps. However, the actual H‐Q relationship was represented as anticlockwise “loops” caused by the contraction of the natural LV. The comparative in vitro data on these H‐Q loops showed that the shape of the loops was changed drastically by the connecting condition between the pump and natural cardiovascular system.