Takashima Kazuto, Ikeda Yuta, Yoshinaka Kiyoshi, Ohta Makoto, Mori Koji, Toma Naoki
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan.
Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
J Neuroendovasc Ther. 2021;15(4):233-239. doi: 10.5797/jnet.oa.2020-0069. Epub 2020 Dec 3.
To ensure safe coil embolization for intracranial aneurysms, it is important to investigate the contact force between the coil and the aneurysm wall. However, it is unclear how the catheter tip position and the diameter of the secondary loop of the coil influence the contact force. In this study, we measured the contact force between a coil and an aneurysm biomodel under different conditions.
A commercially available coil was inserted through a microcatheter into a silicone rubber aneurysm model at a constant speed (1 mm/s) using an automatic stage, and the contact force between the coil and the aneurysm wall was measured by a force sensor attached on the aneurysm model. The inner diameter of the spherical aneurysm was 5 mm. The effects of varying the position of the catheter tip (near dome, center, near neck) and the diameter of the secondary coil (4.5 mm) were evaluated.
When the catheter tip was inserted more deeply into the aneurysm (especially near the dome), the contact force increased. The contact force also increased as the secondary coil diameter was increased with the catheter tip near and in the center of the dome.
These results suggest that the catheter tip position and the secondary coil diameter affect the contact force. In particular, the contact force should be considered large with the catheter tip near the dome to ensure safe coil deployment.
为确保颅内动脉瘤的线圈栓塞安全，研究线圈与动脉瘤壁之间的接触力很重要。然而，尚不清楚导管尖端位置和线圈次级环的直径如何影响接触力。在本研究中，我们测量了不同条件下线圈与动脉瘤生物模型之间的接触力。
使用自动载物台以恒定速度（1毫米/秒）将市售线圈通过微导管插入硅橡胶动脉瘤模型中，并用附着在动脉瘤模型上的力传感器测量线圈与动脉瘤壁之间的接触力。球形动脉瘤的内径为5毫米。评估了改变导管尖端位置（靠近瘤顶、中心、靠近瘤颈）和次级线圈直径（4.5毫米）的影响。
当导管尖端更深入地插入动脉瘤时（尤其是靠近瘤顶处），接触力增加。当导管尖端靠近瘤顶中心且次级线圈直径增加时，接触力也增加。
这些结果表明导管尖端位置和次级线圈直径会影响接触力。特别是，为确保线圈安全部署，当导管尖端靠近瘤顶时应认为接触力较大。
