Ichikawa Seiji, Nonaka Kenji, Linneweber Joerg, Kawahito Shinji, Motomura Minoru, Nishimura Ikuya, Glueck Julia, Shinohara Toshiyuki, Nosé Yukihiko
Baylor College of Medicine, Houston, Texas, USA.
Artif Organs. 2002 Dec;26(12):1050-2. doi: 10.1046/j.1525-1594.2002.07005_1.x.
The Gyro permanently implantable pump consists of a sealless pump housing and an impeller supported with a double pivot bearing. The secondary vanes are attached to increase the secondary flow to avoid thrombus formation behind the impeller. Flow visualization studies using an oil film method were performed on three types of impellers: no secondary vanes, 0.5 mm height secondary vanes, and 1.0 mm height secondary vanes. Comparison studies of these impellers were performed on the surfaces of the impeller bottom and bottom housing. Regarding the surface of the impeller bottom, the impeller with no secondary vanes had the least stagnant areas around the shaft. On the other hand, the impeller having 1.0 mm height secondary vanes had the most distinguished flow lines on the bottom housing. Overall, the impeller secondary vanes with a height of 0.5 mm (current design) seemed to create the most effective secondary flow.
陀螺式永久植入泵由一个无密封泵壳和一个由双枢轴承支撑的叶轮组成。附加上次级叶片以增加次级流量，避免在叶轮后方形成血栓。使用油膜法对三种类型的叶轮进行了流动可视化研究：无次级叶片、0.5毫米高的次级叶片和1.0毫米高的次级叶片。在叶轮底部和底部壳体表面对这些叶轮进行了比较研究。关于叶轮底部表面，无次级叶片的叶轮在轴周围的停滞区域最少。另一方面，具有1.0毫米高次级叶片的叶轮在底部壳体上的流线最为明显。总体而言，高度为0.5毫米的叶轮次级叶片（当前设计）似乎能产生最有效的次级流量。
