Abstract
To clarify the effect of blood vessel elasticity in the cerebral aneurysm, the measurement of velocity vector at the blood flow waveform in the elastic and rigid aneurysm models was measured by particle image velocimetry (PIV). These models were constructed of silicone resin and simulated the geometry of a saccular aneurysm at middle cerebral artery (MCA). PIV measurements was carried out at the maximum Reynolds number of 700 and for the Womersley number of 1.41 in middle cerebral artery (MCA: M1). A roller pump controlled the flow waveform and the flow rate. The big difference of inflow from the neck was found: the rigid model had flow along the wall on the other hand the elastic model had one away from the wall. This difference was caused by elasticity of aneurysm model. This indicates that the effect of blood vessel elasticity is important.
