Hemodynamics Analysis of Interventional Robots in Diagnosis and Treatment Based on Fluid-structure Interaction

doi:10.3969/j.issn.1004-132X.2023.21.008

Abstract

Abstract: The blood flow characteristics of interventional robots in motion at different heights in blood vessel were studied， with a bi-directional FSI method considering blood flow and blood vessel deformation， and the fluid flow field measurement system for microrobots. The results show that in pulsatile blood flow， height of the interventional robots in blood vessel has a little impact on hemodynamics parameters such as blood flow streamline， blood pressure， and vessel wall shear stress， but they are much greater than those as no interventional robot in blood vessel. The hemodynamics parameters calculated by elastic vessel model are slightly smaller than those calculated by rigid vessel model. When the robot intervenes， the maximum blood flow velocity is as 0.48 m/s， and the maximum blood pressure is as 119.3 Pa. The distribution of the numerical results are similar to the experimental ones.

Key words: , interventional robot, fluid-structure interaction（FSI）, hemodynamics, computational fluid dynamics（CFD）, particle image velocimetry（PIV）

摘要： 采用考虑血液流动和血管变形的双向流固耦合方法，并结合机器人管内脉动流体流场测量系统，研究了介入机器人在血管内不同高度移动时的血流特性。结果表明：脉动血流中，介入机器人管内运行高度对血流流线、血压和管壁剪切应力等影响较小，但均远大于无介入机器人时的参数值。弹性血管模型的血流动力学参数均小于刚性血管模型的对应参数。机器人介入时，最大血流速度为0.48 m/s，最大血压为119.3 Pa，数值计算结果与实验测量结果的分布趋势相似。

关键词: 介入机器人, 流固耦合, 血流动力学, 计算流体动力学, 粒子图像测速

CLC Number:

TH122
O351

ZHU Zongming, JI Suqiang, WANG Hao, TANG Puhua, LIANG Liang. Hemodynamics Analysis of Interventional Robots in Diagnosis and Treatment Based on Fluid-structure Interaction[J]. China Mechanical Engineering, 2023, 34(21): 2592-2599.

朱宗铭, 季苏强, 王浩, 唐蒲华, 梁亮. 基于流固耦合的介入机器人诊疗时血流动力学分析[J]. 中国机械工程, 2023, 34(21): 2592-2599.

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