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In the 80's, biomechanicians were asked to work on Computer Aided Surgeryapplications since orthopaedic surgeons were looking for numerical tools ableto predict risks of fractures. More recently, biomechanicians started toaddress soft tissues arguing that most of the human body is made of suchtissues that can move as well as deform during surgical gestures [1]. Anintra-operative use of a continuous Finite Element (FE) Model of a given tissuemainly faces two problems: (1) the numerical simulations have to be"interactive", i.e. sufficiently fast to provide results during surgery (whichcan be a strong issue in the context of hyperelastic models for example) and(2) during the intervention, the surgeon needs a device that can be used toprovide to the model an estimation of the patient-specific constitutivebehaviour of the soft tissues. This work proposes an answer to the secondpoint, with the design of a new aspiration device aiming at characterizing thein vivo constitutive laws of human soft tissues. The device was defined inorder to permit sterilization as well an easy intra-operative use.

In-vivo measurement of the human soft tissues constitutive laws. Applications to Computer Aided Surgery