A novel material point method (MPM) based needle-tissue interaction model

Abstract

Needle-tissue interaction model is essential to tissue deformation prediction, interaction force analysis and needle path planning system. Traditional FEM based needle-tissue interaction model would encounter mesh distortion or continuous mesh subdivision in dealing with penetration, in which the computational instability and poor accuracy could be introduced. In this work, a novel material point method (MPM) is applied to establish the needle-tissue interaction model which is suitable to handle the discontinuous penetration problem. By integrating a hyperelastic material model, the tissue deformation and interaction force can be solved simultaneously and independently. A testbed of needle insertion into a Polyvinyl alcohol (PVA) hydrogel phantom was constructed to validate both tissue deformation and interaction force. The results showed the experimental data agrees well with the simulation results of the proposed model.

Keywords:

• Nonlinear hyperelastic soft tissues
• tissue-needle interaction force
• needle insertion
• material point method
• medical simulation

Disclosure statement

The authors declare that they have no conflict of interest.

Additional information

Funding

This work was supported the National Major Scientific Research Instrument Development Project of National Natural Science Foundation of China (NSFC) (Grant No. 81827804), Zhejiang Provincial Natural Science Foundation of China (grant no. LSD19H180004), Science Fund for Creative Group of NSFC (No. 51821903), and the NSFC (Grant No. 51665049).