Visualization study of the transient flow in the centrifugal blood pump impeller.

: Rotary blood pumps as a left ventricular assist device have several advantages over the use of existing pulsatile devices used for this purpose. The relative velocity distribution to the rotating impeller was observed by high-speed videography and particle image velocimetry (PIV) with the purpose of characterizing the unsteady fluid motion in the impeller and assessing antithrombogenicity based on the fluid dynamic properties within the flow path. Flow visualization in the present study has clearly shown the existence of drastic transient motion of flows in the impeller. The secondary flows developed in the passage, which are adverse in terms of hydrodynamic efficiency, contributed to the washout conditions on the blood contacting surface.

[1]  J F Antaki,et al.  A mathematical model for shear-induced hemolysis. , 1995, Artificial organs.

[2]  R T Schoephoerster,et al.  Effects of local geometry and fluid dynamics on regional platelet deposition on artificial surfaces. , 1993, Arteriosclerosis and thrombosis : a journal of vascular biology.

[3]  T Tateishi,et al.  A quantitative visualization study of flow in a scaled-up model of a centrifugal blood pump. , 1996, Artificial organs.

[4]  J F Antaki,et al.  An implantable centrifugal blood pump with a recirculating purge system (Cool-Seal system). , 1998, Artificial organs.

[5]  K Butler,et al.  Development of the Nimbus/Pittsburgh axial flow left ventricular assist system. , 1997, Artificial organs.

[6]  Alfrey Cp,et al.  Erythrocyte damage and destruction induced by shearing stress. , 1968 .

[7]  T Mussivand,et al.  Fluid dynamic optimization of a ventricular assist device using particle image velocimetry. , 1999, ASAIO journal.

[8]  T. Akamatsu,et al.  Prediction of Hemolysis in Turbulent Shear Orifice Flow. , 1996, Artificial organs.

[9]  Katsumi Aoki,et al.  Measurement of Relative Velocity Distribution in Centrifugal Blower Impeller , 1985 .

[10]  Y Nosé,et al.  The DeBakey ventricular assist device: current status in 1997. , 1999, Artificial organs.

[11]  C Bludszuweit,et al.  Model for a general mechanical blood damage prediction. , 1995, Artificial organs.

[12]  J F Antaki,et al.  Fluid dynamic characterization of operating conditions for continuous flow blood pumps. , 1999, ASAIO journal.

[13]  T Akutsu,et al.  Terumo implantable left ventricular assist system: results of long-term animal study. , 2000, ASAIO journal.

[14]  Y Nosé,et al.  A fluid dynamic analysis using flow visualization of the Baylor/NASA implantable axial flow blood pump for design improvement. , 1995, Artificial organs.