Mechanical analysis of end-to-end silk-sutured anastomosis for robot-assisted surgery

作者：Liu Ying; Wang Shuxin; Hu S Jack; Qiu Wei

来源：International Journal of Medical Robotics and Computer Assisted Surgery, 2009, 5(4): 444-451.

DOI：10.1002/rcs.276

• robot-assisted surgery
• surgery simulation
• vessel anastomosis
• surgery quality
• process factor

Background Robot-assisted anastomosis holds great promise for the future. To secure surgery quality, some key process factors, such as the force arrangement of sutures, should be provided because of the lack of haptic feedback in robotics systems
Methods A model of anastomosis is presented to establish the mechanical relationship between vessel and sutures. Stress distribution of the vessel loaded by the suture was then achieved through finite-element simulations, based on the material property test results. Further, experiments were performed to validate the reliability of the FEM simulation of the anastomosis process.
Results To avoid blood osmosis, the allowable lower limit of the suture tension was 0.05 N. To keep the tissue free from injury, the allowable upper limit of tension on the suture was 0.4 N.
Conclusions The study provided meaningful results for directing the robot-assisted anastomosis procedure and design of the surgical tools.

• 出版日期2009-12
• 单位天津大学