Evaluation of effect of aneurysm model material on coil contact force and catheter movement

To ensure safe coil embolization for cerebral aneurysms, it is important to investigate the contact force between a and an aneurysm wall. Therefore, in our previous study, we developed experimental system measuring biomodel. However, because model was made of silicone rubber, its physical properties, such as friction coefficient, differed from those aneurysms vivo. this using poly (vinyl alcohol) hydrogel (PVA-H) evaluated effect material on force. In addition, acquired images during experiment behavior catheter relationship movement A commercially available inserted through into two types models (silicone rubber PVA-H), effects tip position (near dome, at center, near neck) were evaluated. The total PVA-H smaller than model. (total movement) greater (smaller) when deeper These results suggest that state affects these values are related.