First French-British International Workshop on Virtual Reality

Measurements of Mechanical Interactions between ovaries and a rigid Instrument.

Abstract

In order to program a training simulator for laparoscopic surgery and to reproduce realistic haptic feelings, we performed measurements on isolated ovaries of sows. Two types of 1-D mechanical tests were performed: loading-unloading (strain/stress) and relaxation tests. The first results show that the ovary behaves as a viscoelastoplastic body. The loading-displacement curves illustrate a non linear elasticity. We identified the parameters of a Maxwell model simulating the ovary. The presented works will be pursued to take into account the dynamic behaviour, investigate the heterogeneity of the ovarian structure and carry out in vivo measurements under true surgical conditions.

Keywords : biological organ, mechanical model, viscoelasticity, deformable bodies

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