Zwarts M S, Topaz S R, Jones D N, Kolff W J
Kolff's Laboratory, Department of Bioengineering, University of Utah, Salt Lake City, USA.
Int J Artif Organs. 1996 Dec;19(12):719-22.
A Stepper Motor Driven Reciprocating Pump (SDRP) can replace roller pumps and rotary pumps for cardio pulmonary bypass, hemodialysis and regional perfusion. The blood pumping ventricles are basically the same as ventricles used for air driven artificial hearts and ventricular assist devices. The electric stepper motor uses a flexible linkage belt to produce a reciprocating movement, which pushes a hard sphere into the diaphragm of the blood ventricles. The SDRP generates pulsatile flow and has a small priming volume. The preset power level of the motor driver limits the maximum potential outflow pressure, so the driver acts as a safety device. A double pump can be made by connecting two fluid pumping chambers to opposing sides of the motor base. Each pump generates pulsatile flow. Pressure and flow studies with water were undertaken. Preliminary blood studies showed low hemolysis, even when circulating a small amount of blood up to 16 hours.
步进电机驱动往复泵（SDRP）可替代滚压泵和旋转泵，用于体外循环、血液透析和区域灌注。血泵心室与用于气动人工心脏和心室辅助装置的心室基本相同。电动步进电机使用柔性联动带产生往复运动，将硬球推压到血泵心室的隔膜中。SDRP产生脉动流，且预充量小。电机驱动器的预设功率水平限制了最大潜在流出压力，因此该驱动器起到安全装置的作用。通过将两个流体泵送腔连接到电机底座的相对两侧可制成双泵。每个泵都产生脉动流。进行了用水的压力和流量研究。初步血液研究表明，即使少量血液循环长达16小时，溶血率也很低。
