Kabei N, Tuichiya K, Sakurai Y
Institute of Biomedical Engineering, Tokyo Women's Medical College, Japan.
Artif Organs. 1994 Sep;18(9):657-63. doi: 10.1111/j.1525-1594.1994.tb03395.x.
When designing a turbo-type blood pump as an artificial heart, the gap between a rotating shaft and a pump housing should be perfectly sealed to prevent any leakage or contamination through a seal. In addition, blood coagulation in a blood chamber must be avoided. To overcome these problems, we proposed five different nonrotating-type turbo pumps: a caudal-fin-type axial-flow pump, a caudal-fin-type centrifugal pump, a nutating-column-type centrifugal pump, a nutating-collapsible-tube-type centrifugal pump, and an oscillating-disk-type centrifugal pump. We selected and developed the oscillating-disk-type centrifugal pump that consists of a disk, a driving rod, a seal, an oscillation mechanism, and a pump housing. The disk is mounted on the end of the rod, which is connected to a high-speed DC motor through an oscillation mechanism. The rod and the disk do not rotate, but they oscillate in the pump housing. This movement of the disk generates forward fluid flow around the axis (i.e., the rotational fluid flow). Centrifugal force due to fluid rotation supports the pressure difference between the outlet and the inlet. The diameter of the disk is 39 mm, the maximum inner diameter of the pump housing is 40 mm, and the volume of the blood chamber for 25 degrees' oscillation is 16.9 ml. The performance of the pump was tested in a mock circulatory system.(ABSTRACT TRUNCATED AT 250 WORDS)
在设计作为人工心脏的涡轮式血泵时，旋转轴与泵壳之间的间隙应完美密封，以防止通过密封处发生任何泄漏或污染。此外，必须避免血腔内的血液凝固。为克服这些问题，我们提出了五种不同的非旋转式涡轮泵：尾鳍型轴流泵、尾鳍型离心泵、章动柱型离心泵、章动可折叠管型离心泵和振荡盘型离心泵。我们选择并开发了由盘、驱动杆、密封件、振荡机构和泵壳组成的振荡盘型离心泵。盘安装在杆的端部，杆通过振荡机构连接到高速直流电机。杆和盘不旋转，但它们在泵壳内振荡。盘的这种运动在轴周围产生向前的流体流动（即旋转流体流动）。由于流体旋转产生的离心力支撑出口和入口之间的压力差。盘的直径为39毫米，泵壳的最大内径为40毫米，25度振荡时血腔的体积为16.9毫升。该泵的性能在模拟循环系统中进行了测试。（摘要截断于250字）
