A Preliminary Flow Visualization Study in a Multiple Disk Centrifugal Artificial Ventricle

Abstract

Flow patterns in a multiple disk centrifugal pump were analyzed so that the device could be incorporated as a ventricular assist or a bridge-to-transplant device. The pump operates either in pulsatile or steady flow modes with the ability to change modes within a fraction of a second. The pump was tested on a mock circulatory system consisting of an arterial fluid capacitor, a systemic resistor, and a venous capacitor. Arterial volume flow rate, arterial pressure, inlet (venous) pressure, and pump rotation speed are continually monitored. A glycerin/water solution is used as a blood analog. Flow visualization was performed with a 3 mW yellow laser, sheet lens, neutrally buoyant amberlite particles, and both still and motion picture photography. Flow patterns matched theoretical predictions very well; inlet flow spread radially outward through the disk annular spaces while propelled by shear and centrifugal forces.

The Experimental Model of Disc-Pump for Mechanical Circulatory Support

“…Исследования по адаптации дисковых насосов трения для использования в качестве LVAD описа-ны в ряде работ [15][16][17][18]. Ротор насоса был собран из дисков с внешним диаметром 76 мм.…”

Prospects of Disk Pump for Mechanical Circulatory Support in Cardiac Surgery (Review)

“…Miller [5,6] приводятся результа-ты исследования работы центробежного дискового насоса Тесла (рис. 1) для использования в качестве устройства механической поддержки сердца.…”

Modular Extracorporeal Liver Support

“…2) was constructed following Rosenberg (24) which has been used previously in this lab. The LVAD used is a multiple disk centrifugal blood pump that Miller and colleagues (25)(26)(27) adapted for use as a blood assist device. The device has been shown to produce smooth, laminar streamlines and therefore not impact fluid being pumped (28).…”