Current states of small and lightweight pulsatile motor driven LVAD

• Autorzy: Okamoto E. , Tanaka S. , Makino T. , Miura K. , Okada S. , Mitoh A. , Mitamura Y.
• Języki publikacji: EN

Abstrakty

EN

A small size and lightweight motor-driven pulsatile LVAD using a ball screw has been developed. The motor-driven LVAD consists of a brushless DC motor and a ball-screw. The ball screw converts rotational motion of the motor into rectilinear motion of the pusher plate. The magnetic force between the tiny magnets on the pusher plate and the iron plate adhered on the pump diaphragm provides an active filling operation during the pump filling phase. The pump has a stroke volume of 55 ml, the whole volume of 285 ml and it weighs 360 g. The controller employs the fuzzy logic position and velocity control so that the LVAD experts’ experience could be used in the design of the controller. The LVAD was evaluated in the in-vitro experiments using the mock circulation. Maximum pump outflow of 5.1 l/min was obtained at the drive rate of 100 bpm against an afterload of 100 mmHg, and the active filling mechanism using the magnetic force provided a pump output of 3.6 l/min at a drive rate of 75 bpm under a preload of 0 mmHg. The operating efficiency of the LVAD was established to be measured between 8 and10%.

Słowa kluczowe

EN

artificial heart; VAD; implantable; ball-screw

PL

sztuczne serce; wszczepianie; przekładnia śrubowa kulkowa

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2007
• Tom: Vol. 27, no. 1-2
• Strony: 155--160
• Opis fizyczny: Bibliogr. 4 poz., rys., wykr.

Twórcy

autor

Okamoto E.

autor

Tanaka S.

autor

Makino T.

autor

Miura K.

autor

Okada S.

autor

Mitoh A.

autor

Mitamura Y.

• School of Engineering, Hokkaido Tokai University, Sapporo, Japan,

Bibliografia

• 1. Snyder A., Pae W., Boehmer J., Rosenberg G., Weiss W., Piece W., Thompson J., Frank D., Zintak H., Scholl S., Korfer R., El-Banayosy A., Arusoglu L.,Fey O., Morshuis M.: First clinical trails of a totally implantable destination therapy ventricular assist system. J. Congest Heart Fail Circ. Support, 2001, 1, 185-192.
• 2. Minami K., Arusoglu L., El-Banayosy A., Sezai A., Boethig D., Morshuis M., Fey O., Sanowski P., Korfer R.: Bridging to heart transplantation using paracorporeal and implantable ventricular assist devices. J. Congest Heart Fail Circ. Support, 2001,1, 179-184.
• 3. Okamoto E., Tomoda K., Yamamoto K., Mitamura Y, Mikami T.: Development of a compact, high efficiency, totally implantable motor-driven assist pump system. Artif. Organs 1994, 18, 911-917.
• 4. Fukamachi K.: New technologies for mechanical circulatory support: current status and future prospects of CorAide and MagScrew technologies. J. Artif. Organs, 2004, 7,45-57.