Influences of Cannula Exit Shape on Blood Flow in Aortic Arch

Abstract

The liquid flow perfused from the four types of cannula into an aortic arch glass model was visualized by using the PIV method. In the case of end-hole and Dispersion cannulae, the liquid jet from a cannula impinges on the inner wall of an aorta near a first bood vessel branch and flows toward a descending aorta along the outer wall of curvature of the aortic arch. The rms value of the velocity and the magnitude of the strain rate tensor have their large values on the outer wall of curvature. In the case of Soft-Flow cannula, the liquid jet from the cannula impinges on the top of the inner wall of curvature of the aortic arch, and flows toward the third branch. The rms value shows its large values in the whole area of the aortic arch. The magnitude shows its large values on the outer wall of curvature near third branch and the top of the inner wall of curvature. In the case of the SELECT 3D cannula, the liquid flow from a cannula impinges on the top of the inner wall of curvature, and then flows toward the descending aorta along the inner wall of curvature. The rms value and the magnitude have their large values on the descending aorta side of the inner wall of curvature.