Shape memory alloy clip for compression colonic anastomosis

• Published in: Journal of biomechanical engineering Vol. 127; no. 2; p. 351
• Main Authors: Song, Chengli, Frank, Tim, Cuschieri, Alfred
• Format: Journal Article
• Language: English
• Published: United States 01.04.2005
• Subjects: Anastomosis, Surgical - instrumentation; Anastomosis, Surgical - methods; Biocompatible Materials - chemistry; Colon - physiopathology; Colon - surgery; Computer Simulation; Computer-Aided Design; Digestive System Surgical Procedures - instrumentation; Digestive System Surgical Procedures - methods; Elasticity; Equipment Design - methods; Equipment Failure Analysis - methods; Humans; Materials Testing; Models, Biological; Stress, Mechanical; Sutures; Temperature; Tensile Strength; Treatment Outcome
• ISSN: 0148-0731
• DOI: 10.1115/1.1871195

This study was setup to investigate the design and performance of a shape memory alloy clip for colonic anastomosis. The thermo-mechanical properties of the shape memory alloy material were studied and the data were used to derive a nonlinear material model. This enabled the development of computer computer aided design models and finite element analysis of the clip and tissue compression. The maximum strain of the anastomosis clip was within the recoverable range, and it exerted parallel compression of the colonic walls with a uniform pressure distribution. The design of the anastomosis clip was optimized for safe, simple, and effective use in colon surgery.