An experimental study on biomechanical properties of hepatic tissue using a new measuring method.

Hepatic tissue is an important internal organ for life. In this paper, we combined the moire method (an optical method) and indentation technique to investigate biomechanical response of hepatic tissue. To examine this measuring technique, we first measured the biomechanical properties of the block of pig's hepatic tissue using this method. The experimental result indicated that the pig's hepatic tissue was obviously a viscoelastic material. We closely analyzed the change of curves for force relaxation, creep, and nonlinear deformation of the block of pig's liver. Meanwhile, we also compared the changes in the biomechanical parameters of normal and cirrhosis hepatic tissue of humans.