Sharif University of Technology Scientia Iranica 1026-3098 22 5 2015 10 01 A Mass-Spring-Damper Model for Real Time Simulation of the Frictional Grasping Interactions between Surgical Tools and Large Organs A Mass-Spring-Damper Model for Real Time Simulation of the Frictional Grasping Interactions between Surgical Tools and Large Organs 1833 1841 3745 EN Hossein Dehghani Ashkezari Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran RCBTR, Tehran University of Medical Sciences, Tehran, Iran Alireza Mirbagheri Physics and Biomedical Engineering Department, School of Medicine and Research Center for Biomedical Technologies and Robotics (RCBTR), Tehran University of Medical Sciences, Tehran, Iran Saeed Behzadipour Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran 0000-0001-9313-315X Farzam Farahmand Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran. RCBTR, Tehran University of Medical Sciences, Tehran, Iran 0000-0001-8900-7003 Journal Article 2015 03 01 Considering the loss of direct visual and tactile information, surgeons require special training programs to obtain sufficient proficiency for laparoscopic surgery. Surgical training simulation systems provide an effective alternative to animal models for repetitive training practices. The purpose of this study was to develop a biomechanical model of large soft organs for simulation of the interactions of a surgical grasper and spleen in real-time. The mechanical behavior of the spleen was molded in detail, including its nonlinear hyper viscoelastic properties, using a mass-spring-damper model. A novel collision detection algorithm was used to determine the tool-tissue contact zones. Force-based and geometry-based boundary conditions were imposed at the contact nodes, respectively, to represent slippage-included and slippage-free grasping conditions. The model’s predictions were validated against the experimental results on a synthetic test sample. Results of simulation of interactions between the grasping tool and the spleen organ indicated that the non-linear rate dependent and stress relaxation behaviors of the tissue was well depicted by the model. Also, the model was capable of reflecting the effect of tool-tissue friction coefficient on the slippage-free or slippage-included grasping behaviors. https://scientiairanica.sharif.edu/article_3745_6d3a2d24eb109dddf78374fe5d0ee067.pdf