Failure of Soft Biological Tissues Inserting of Needles

This research aims the failure of soft biological tissues in the context of minimally invasive surgery based on numerical analysis that fits experimental results. Using robotic arms for assistance in medical procedures during the last years led to new trends in the development of devices for inserting needles into biological tissues, as well as expansion of studies for the development of new types of needles. A better understanding of the mechanical interaction between a medical tool and a biological tissue requires not only detailed investigation and experimental testing but also study for evaluation of the tissue characteristics and the effect of the needle geometry on the process. The purpose of this first study is to investigate the mechanical properties of soft medical tissues, and the force reaction at needles and to study necessary aspects for performing FEA numerical analysis with better results and better correlation with experimental data.