In vivo characterization of soft tissue is a key step towards accurate biomechanical simulation enabling planning and intra-operative assisted surgery. This chapter presents the new version of LASTIC, a device measuring soft tissue deformations using a negative pressure. Its capabilities are compared with standard tensile tests on five samples with different elastic properties, i.e. Young modulus, from 10 kPa to 1 MPa, in order to estimate its accuracy and define the functional measurement range. Results show that LASTIC overestimates Young modulus by an average of 24% compared to the tensile devices. This error, although rather large, allows a first estimation of the elastic modulus of different materials, especially living tissues, even during surgery. Directions for improvements are given that will allow for better patient-specific biomechanical simulations of soft tissues.
CITATION STYLE
Luboz, V., Promayon, E., Chagnon, G., Alonso, T., Favier, D., Barthod, C., & Payan, Y. (2012). Validation of a Light Aspiration Device for In Vivo Soft Tissue Characterization (LASTIC). In Studies in Mechanobiology, Tissue Engineering and Biomaterials (Vol. 11, pp. 243–256). Springer. https://doi.org/10.1007/8415_2012_123
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