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A Percutaneously Accessible Pulsatile Left Ventricular Assist Device: Modified Assist Device Type 5
Author(s) -
Imanishi Kaoru,
Imachi Kou,
Yoshito Hiroshi,
Isoyama Takashi,
Abe Yusuke,
Chinzei Tsuneo,
Mabuchi Kunihiko,
Kanda Katsuki,
Tsutsui Nobumasa,
Suma Kozo,
Fujimasa Iwao
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.tb00718.x
Subject(s) - cannula , pulsatile flow , ventricle , circulatory system , diastole , medicine , cardiology , blood flow , systole , hemodynamics , aortic valve , ventricular assist device , cardiac cycle , percutaneous , outflow , biomedical engineering , surgery , blood pressure , heart failure , physics , meteorology
To provide percutaneous access, a new circulatory assist system was developed. We call this newly developed system the modified assist device (MAD). The system is composed of a sac‐type blood pump and cannula. Inflow and outflow valves are mounted in the apex and at the side wall 10 cm from the apex of the cannula, respectively. During systole, the blood is sucked from the left ventricle through the inflow valve of the cannula connected to the blood pump, and during diastole, the blood is ejected to the root of the aorta through the outflow valve. In vitro and in vivo evaluations of the pump performance were performed. The maximum flow rate of 1.9 L/min was obtained in the mock circulatory system. In our animal experiment, effective systolic unloading and diastolic augmentation were observed by activation of this system during regular sinus rhythm. In conclusion, the MAD‐5 is thought to be percutaneously accessible and increases systemic and coronary flow.