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- Title
USING SIMULATION TO STUDY CUTTING FORCE IN BIOPSY NEEDLE INSERTION WITH BI-DIRECTIONAL ROTATION.
- Authors
YEN, CHUN-JUNG; HUANG, YU-AN; LIN, CHI-LUN
- Abstract
The rotational motion has been utilized in several medical needle technologies to enhance the capability of cutting tissue. The needle rotation helps significantly reduce the tissue cutting force, which improves procedure outcome and pain. However, the needle rotation can also incur tissue winding that intensifies tissue damage, which results in complications of bleeding and hematoma. Some histological observations showed that bidirectional needle rotation could reduce the tissue damage caused by tissue winding. In this study, we established a cohesive surface based finite element model to evaluate the cutting force in needle insertion with unidirectional and bidirectional rotation. The simulation results suggested that the frequency of switching direction of needle rotation insignificantly influences the cutting force. The Latin Hypercube method was used to generate a response surface of cutting force and locate the minimum at the insertion speed of 1 mm/s combined with the slice/push ratio of 1.9. In clinical use, we suggested that the needle speeds can be first selected to optimize the cutting force according to the type of target tissue. If the desired needle rotation is high, a proper switching frequency can be applied to reduce the tissue winding damage without increasing the cutting force.
- Subjects
CUTTING force; NEEDLE biopsy; SURFACE forces; ROTATIONAL motion; WIND damage; MEDICAL technology
- Publication
Journal of Mechanics in Medicine & Biology, 2019, Vol 19, Issue 2, pN.PAG
- ISSN
0219-5194
- Publication type
Article
- DOI
10.1142/S0219519419400207