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[165] Citation: J. D. Brown, J. Rosen, Y. S. Kim, L. Chang, M. Sinanan, B. Hannaford,
'In-Vivo and In-Situ Compressive Properties of Porcine Abdominal Soft Tissues,'
Studies in Health Technology and Informatics - Medicine Meets Virtual Reality, vol. 94, pp. 26-32, IOS Press, Newport Beach, CA., January 2003.
Abstract
Accurate biomechanical characteristics of tissues are essential for
developing
realistic virtual reality surgical simulators utilizing haptic feedback.
Surgical simulation technology has progressed rapidly but lacks a
comprehensive database of soft tissue mechanical properties with which to
incorporate. Simulators are often designed purely based on what "feels right;
"quantitative empirical data are lacking. A motorized endoscopic grasper was
used to test abdominal porcine tissues in-vivo and in-situ with cyclic and
static compressive loadings. An exponential constitutive equation was fit to
the resulting stress-strain curves, and the coefficients were compared for
various conditions. Stress relaxation for liver and small bowel were also
examined. Differences between successive squeezes and between in-vivo and
in-situ conditions were found.
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Updated: Tue Jul 15 23:54:51 2008
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