Reduced Size Bi-Flow Centrifugal Pump as Ventricular Assist Device for End-Stage Patients
The shortage of donor hearts for patients with end stage heart failure has accelerated the development of ventricular assist devices (VAD) to support the left (LVAD) and right (RVAD) ventricles of a failing heart. Current BVAD technology is either too bulky or necessitates having to implant two pumps working independently. This paper illustrates the combination of the LVAD and RVAD as one complete device to augment the function of both the left and right cardiac chambers with double impellers. The device has two impellers rotating in counter directions. Our work to date has clearly shown the benefit of using a double sided impeller through studies of axial force imbalance and flow visualisation to assess possible sites of flow stagnation. The results illustrate that with proper impeller configurations and volute design of the output chambers, differential flow dynamics can be achieved to deliver an output of 4-6 lit/min and delivery pressure of 20-100 mmHg. With the outputs from the pump flowing in counter directions, there is significant benefit in eliminating the necessity of the body muscles and tubing/heart connection to restrain the pump.
left ventricular assist device biventricular assist device right ventricular assist device centrifugal heart pump-artificial organs counter flow pump
Andy C C Tan
School of Engineering Systems Queensland University of Technology Brisbane, QLD 4001, Australia
国际会议
The Fourth International Symposium on Fluid Machinery and Fluid Engineering(第四届流体机械与流体工程国际会议)
北京
英文
14-19
2008-11-25（万方平台首次上网日期，不代表论文的发表时间）