Finite element modeling for soft tissue surgery based on linear and nonlinear elasticity behavior

Figures & data

Figure 1. Tetraheadral P1 + /P1 mini-element [4].

Figure 2. Experimental (a) and computed (b) results for a lamb kidney indentation.

Figure 3. Comparison between experimental and computed results for different constitutive equations (lamb kidney).

Table I.  Identification results for lamb kidney.

Law	Parameters		Least square estimation
Linear Hooke's law	Young's  Modulus = 0.02 MPa		14.18 %
Neo-Hookean law	c = 0.0034 MPa		8.12 %
Mooney-Rivlin 1	c1 = 0.00034	c2 = 0.00306	3.48 %
Mooney-Rivlin 2	c1 = 0.0004	c2 = 0.004	3.74 %
Fung-Demiray	μ = 0.0067	γ = 5.0	1.75 %

Figure 4. Qualitative comparison between a real surgical procedure (a, b) and computed results (c, d) for uterine palpation (a, c) and tubal mobility exploration (b, d).

Tillier Y, Paccini A, Durand-Réville M, Chenot J-L. Three-dimensional finite element simulation of surgery: From material forming to biomechanics. ESAFORM Bulletin 2004; 4(1)

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