Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
Jumping phenomenon is known as one of the problems of endovascular treatment. This is that after the tip of the device stops, it suddenly bounces and damages the vessel wall.The purpose of this study is to investigate the factors of jumping. Using a crank-shaped blood vessel phantom with a circular cross-section made by a 3D printer, a device combining a catheter and a guide wire was inserted into this blood vessel phantom. We observed the behavior of the inserted device with a camera from one direction. The captured video was divided into a series of images. The tip of the device was manually identified to calculate the stationary time and jumping distance per frame. Furthermore, the strain energy was calculated from the device tracked by the MRF method.In the case of the blood vessel phantom with the largest angle, the time that the tip stopped at the curve part was 0.6-0.8 s. When jumping occurred, the distance was 10-20 pixels. The shorter the distance between the catheter and the guidewire, the shorter the total stop time and the jumping distance. In order to prevent irregular device behavior in blood vessels, it is desirable to operate the catheter and the guide wire close to each other.
