大動脈弁埋込み補助人工心臓を目指した超小型軸流ポンプの試作

• Published in: Transactions of Japanese Society for Medical and Biological Engineering Vol. 54Annual; no. 26AM-Abstract; p. S53
• Main Authors: 有村, 響子, 矢野, 哲也, 三田村, 好矩, 岡本, 英治
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本生体医工学会 2016; Japanese Society for Medical and Biological Engineering
• ISSN: 1347-443X; 1881-4379
• DOI: 10.11239/jsmbe.54Annual.S53

We have developed a new ultra-miniature axial flow blood pump to realize the Valvo pump that is implanted at the aortic valve position. The new ultra-miniature axial flow blood pump has a diameter of 24.5 mm and a length of 24.5mm, and the volume of the blood pump is 11.5 ml. the axial flow blood pump uses passive magnetic bearing for levitating in an axial direction and hydrodynamic bearing for a radial direction. The axial flow blood pump employs a ceramics inner housing to restrict edge-current loss. The axial flow blood pump was evaluated in vitro using 33 % glycerin solution. The axial flow blood pump had a pump outflow of 2.5 l/min against differential pressure of 50 mmHg at a motor rotational speed of 19000 rpm with an input energy of 9.5 W. Further studies are required including improvement of efficiency and miniaturization of the pump.