Abstract
Long wire-like devices are used for endovascular treatment. These devices are delivered to a lesion though multicurved vessel. In this paper, the simulations of guidewire insertion into vessel models with different shape in the middle were performed to investigate the effect of the vessel shape in the middle on device behavior. Guidewire model was discretized by short rigid tubes and springs between these tubes. Three vessel models which have the same shape near the lesion and the different shape in the middle were used. As a boundary condition at the entrance of the vessel model, insertion operations were given to the guidewire model. The relation between accumulated insertion operation given a guidewire model and actual depth of guidewire tip in the vessel model, and the tip contact force of the guidewire model was monitored. At the position more than 40 mm away from the different shape region, the different device behavior was observed. And the region also affected the moving distance of guidewire according to an insertion operation. These results suggest that there is a possibility that previous experiences about treatments of similar lesions are not able to directly apply to the treatment for other similar lesion.
