A micro-tactile sensor for in situ tissue characterization in minimally invasive surgery

This study presents and characterizes a micro-tactile sensor that can be integrated within MIS graspers. The sensor is capable of measuring contact forces and characterizing softness. The grasping forces are distributed normally, though in some cases concentrated loads also appear at the contact sur...

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Bibliographic Details
Published in:Biomedical microdevices 2008-12, Vol.10 (6), p.823-837
Main Authors: Qasaimeh, M. A., Sokhanvar, S., Dargahi, J., Kahrizi, M.
Format: Article
Language:English
Subjects:
Arteries
Biological and Medical Physics
Biomedical Engineering and Bioengineering
Biomedical research
Biophysics
Biosensors
Endoscopes
Endoscopy
Engineering
Engineering Fluid Dynamics
Microelectronics
Models, Theoretical
Nanotechnology
Surgical techniques
Tissues
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Summary:This study presents and characterizes a micro-tactile sensor that can be integrated within MIS graspers. The sensor is capable of measuring contact forces and characterizing softness. The grasping forces are distributed normally, though in some cases concentrated loads also appear at the contact surfaces. In the latter case, the position of the concentric load can also be determined. This enables the sensor to detect hidden anatomical features such as embedded lumps or arteries. The microfabricated piezoelectric-based sensor was modeled both analytically and numerically. In a parametric study the influence of parameters such as length, width, and thickness of the sensor was studied using a finite element model. The sensor was microfabricated and tested using elastomeric samples. There is a good conformity between the experimental and theoretical results.
ISSN:1387-2176
1572-8781
DOI:10.1007/s10544-008-9197-0