Development of the pulsation device for rotary blood pumps.
A rotary blood pump (RP) is desirable as a small ventricular assist device (VAD). However, an RP is nonpulsatile. We tried to develop a device that attaches a pulse to the RP. We also tried to develop a pulse-generating equipment that was not air-pressure driven. The ball screw motor was considered a candidate. The application of a small-sized shape memory alloy was also attempted. An electrohydraulic system was adopted, and actuator power was connected to the diaphragm. The diaphragm was placed on the outer side of the ventricle. Most RPs that have been developed all over the world drain blood from the ventricle. The wave of a pulse should be generated if a pulse is added by the drawn part. The output assistance from the outer side of the ventricle was attempted in animal experiments, and the device operated effectively. This device can be used during implantable operation of RP. This may serve as an effective device in patients experiencing problems in peripheral circulation and in the function of internal organs.
Yambe
Tomoyuki
T
Department of Medical Engineering and Cardiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan. yambe@idac.tohoku.ac.jp
Shiraishi
Yasuyuki
Y
Sekine
Kazumitsu
K
Shibata
Mune-ichi
M
Yamaguchi
Tasuku
T
Jian
Liu Hong
LH
Yoshizawa
Makoto
M
Tanaka
Akira
A
Matsuki
Hidetoshi
H
Sato
Fumihiro
F
Haga
You-ichi
Y
Esashi
Masayoshi
M
Tabayashi
Kouichi
K
Mitamura
Yoshinori
Y
Sasada
Hiroshi
H
Nitta
Shin-ichi
S
D000818:Animals; D001783:Blood Flow Velocity / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D019544:Equipment Failure Analysis; D006041:Goats; D006353:Heart-Assist Devices; D008904:Miniaturization; D011474:Prosthesis Design; D011673:Pulsatile Flow / Q000502:physiology*; D012399:Rotation