Yamazaki K, Okamoto E, Yamamoto K, Mitamura Y, Tanaka T, Yozu R
Division of Biomedical Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan.
Artif Organs. 1992 Jun;16(3):297-9. doi: 10.1111/j.1525-1594.1992.tb00314.x.
The valvo-pump, an axial nonpulsatile blood pump implanted at the heart valve position, has been developed. The valvo-pump consists of an impeller and a motor, which are encased in a housing. An impeller with 5 vanes (22.0 mm in diameter) is used. The impeller is connected to a samarium-cobalt-rare earth magnet direct current (DC) brushless motor measuring 21.3 mm in diameter and 18.5 mm in length. Sealing is achieved by means of a ferrofluidic seal. A pump flow of 10.5 L/min was obtained at a pump differential pressure of 3.3 kPa (25 mm Hg), and a flow of 4.9 L/min was obtained at 7.0 kPa (53 mm Hg). Sealing was kept perfect against a pressure of 29.3 kPa (220 mm Hg) at 9,000 rpm.
已研发出一种植入心脏瓣膜位置的轴流非搏动性血泵——瓣膜泵。瓣膜泵由一个叶轮和一个电机组成，二者封装在一个外壳中。使用的是一个带有5个叶片（直径22.0毫米）的叶轮。该叶轮连接到一个直径21.3毫米、长度18.5毫米的钐钴稀土永磁直流无刷电机上。密封通过铁磁流体密封实现。在泵的压差为3.3千帕（25毫米汞柱）时，泵流量为10.5升/分钟；在7.0千帕（53毫米汞柱）时，流量为4.9升/分钟。在9000转/分钟时，能完美保持密封以抵抗29.3千帕（220毫米汞柱）的压力。
