动脉血管瘤栓塞弹簧圈机械解脱装置设计

Design of Mechanical Release Device for Arterial Hemangioma Embolic Coil

对动脉血管瘤栓塞弹簧圈机械解脱装置进行设计,确定了栓塞弹簧圈的尺寸设计标准.利用ANSYS有限元分析软件模拟仿真了弹簧圈栓塞本体与推丝在工作中的抗拉性,所设计装置工作中产生的形变拉伸变形为0.006 mm,远优于传统弹簧圈的拉伸形变0.769 mm.对解脱装置的整体柔顺性进行分析,解脱装置推丝部分和与传统弹簧圈相同工况下,推丝最大变形为0.27 mm,优于传统弹簧圈变形量0.3 mm,推丝部分的柔顺性已经达到了适应动脉血管的要求.对解脱装置与动脉血管瘤壁碰撞模型进行动力学分析,术中动脉血管瘤最大变形量为3 mm,在动脉血管瘤破裂极限值4.245 mm以内,从而确定了脱装置在结构简单的前提下有足够的安全性,所设计与开发的动脉血管瘤栓塞弹簧圈解脱装置,使微创介入手术更可靠、安全、有效.

The detailed design of the mechanical release device of aneurysmal embolization coil is completed,the size design standard of embolization coil is determined,and the tensile properties of the coil embolization body and push wire are simulated by ANSYS finite element analysis software.The analysis shows that the deformation and tensile deformation of the device designed is 0.006 mm,which is much better than the tensile deformation of the traditional spring coil of 0.769 mm.The overall compliance of the mechanical release device of aneurysmal embolization spring coil is analyzed.When the wire pushing part of the mechanical release device of aneurysmal embolization spring coil is under the same working conditions as the traditional spring coil,the maximum deformation of the wire pushing part is 0.27 mm,which is better than the traditional spring coil deformation of 0.3 mm,and the compliance of the wire pushing part has reached the requirements of adapting to arterial blood vessels.The dynamic analysis of the collision model between the aneurysm embolization coil mechanical release device and the aneurysm wall shows that the maximum deformation of the aneurysm during operation is 3 mm,which is within the rupture limit of the aneurysm of 4.245 mm.Therefore,it is determined that the aneurysm embolization coil mechanical release device designed and developed in this paper has sufficient safety on the premise of simple structure.It can make minimally invasive interventional surgery more reliable,safe and effective.