title: Development of the pulsation device for rotary blood pumps.
abstract: 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.
authors.affiliation: Department of Medical Engineering and Cardiology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan. yambe@idac.tohoku.ac.jp
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yambe
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Shiraishi
authors.forename: Kazumitsu
authors.initials: K
authors.lastname: Sekine
authors.forename: Mune-ichi
authors.initials: M
authors.lastname: Shibata
authors.forename: Tasuku
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Liu Hong
authors.initials: LH
authors.lastname: Jian
authors.forename: Makoto
authors.initials: M
authors.lastname: Yoshizawa
authors.forename: Akira
authors.initials: A
authors.lastname: Tanaka
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Matsuki
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Sato
authors.forename: You-ichi
authors.initials: Y
authors.lastname: Haga
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Esashi
authors.forename: Kouichi
authors.initials: K
authors.lastname: Tabayashi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Mitamura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sasada
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Nitta
mesh_terms: 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