Iwaya F, Igari T, Hoshino S, Hikichi H
Department of Cardiovascular Surgery, Fukushima Medical College, Japan.
Artif Organs. 1995 Jul;19(7):697-700. doi: 10.1111/j.1525-1594.1995.tb02406.x.
To induce a pulsatile flow in a centrifugal pump, we developed a new device (pulsatile assist device for centrifugal pump: PADCP) using a new concept. This device consists of a flexible polyurethane tube with an air chamber which is connected to the arterial side of the centrifugal pump circuit directly. A mock circulation system was used for evaluation of this PADCP. Thirty to 40 mm Hg of pulse pressure was obtained under 3-6 L/min of flow rate. By increasing the driving pressure of the PADCP from 200 to 600 mm Hg in a mock system, 4-48 mm Hg of pulse pressure was gained accompanied by a decrease in pump flow and increased left atrial pressure. The decreased pump flow and increased left atrial pressure were recovered easily by increasing the flow rate of the centrifugal pump. Pressures at the proximal site of the PADCP were less than 500 mm Hg. The PADCP was useful to induce a pulsatile flow in a centrifugal pump.
为了在离心泵中诱导出脉动血流，我们采用一种新概念开发了一种新装置（离心泵脉动辅助装置：PADCP）。该装置由一根带有气室的柔性聚氨酯管组成，该气室直接连接到离心泵回路的动脉侧。使用模拟循环系统对该PADCP进行评估。在流量为3 - 6升/分钟的情况下可获得30至40毫米汞柱的脉压。在模拟系统中，通过将PADCP的驱动压力从200毫米汞柱增加到600毫米汞柱，可获得4至48毫米汞柱的脉压，同时泵流量减少且左心房压力升高。通过增加离心泵的流量，泵流量减少和左心房压力升高的情况很容易恢复。PADCP近端部位的压力小于500毫米汞柱。PADCP有助于在离心泵中诱导出脉动血流。
