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Technical Brief

Using Simulation to help Specify Design Parameters for Vacuum Assisted Needle Biopsy Systems

[+] Author and Article Information
Xuelian Gu

Shanghai Institute for Minimally Invasive Therapy, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, P. R. China
guxuelian@usst.edu.cn

Fangqiu Hu

Shanghai Institute for Minimally Invasive Therapy, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, P. R. China
take_hu@163.com

Chi-Lun Lin

Department of Mechanical Engineering, National Cheng Kung University, No. 1 University Road, East District, Tainan City 701, Taiwan
linc@mail.ncku.edu.tw

Arthur Erdman

Department of Mechanical Engineering, University of Minnesota, 111 Church St SE #1100, Minneapolis, MN, 55455, United States
agerdman@umn.edu

Licheng Lu

Shanghai Institute for Minimally Invasive Therapy, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, P. R. China
llcheng_rick@163.com

1Corresponding author.

ASME doi:10.1115/1.4041487 History: Received February 26, 2018; Revised September 12, 2018

Abstract

Needle biopsy is a routine medical procedure for examining tissue or biofluids for the presence of disease using standard methods of pathology. The FEA (Finite Element Analysis) methodology can provide guiding for optimizing the geometric design. The needle biopsy is simulated and analyzed while varying the needle angle, the aperture size and the effect of the rotation/translation ratio k on extracting and cutting process. The results shows that tissue reaction force in the axial direction of needle gradually reduces and the stress and strain is more concentrated at the tip of needle with the increases of tip angle; the tissue reaction force is reduced and the torque is increase with increasing the slice-push ratio; and higher slice-push ratio can increase the peak stress concentration on the cutting edge and larger deformation of tissue; In the process of core needle cutting, the increasing slice-push ratio reduces the tissue reaction force significantly, the aperture on distal wall of outer cannula became wider, the increase of tissue reaction force is significant and the cutting process was more unstable. The results have the potential to provide important insight for improving the needle biopsy design process.

Copyright (c) 2018 by ASME
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