Research on the Biocompatibility of the Human Rectum and a Novel Artificial Anal Sphincter

摘要

This paper discusses biocompatibility issues that are related to the human rectum and a novel artificial anal sphincter. The artificial anal sphincter system is a novel hydraulic-electric muscle to treat fecal incontinence. A high integration of all functional components and no wire linking to the outer device make the surgical implantation more easy and lower risk. However, the human rectum is not a rigid pipe, and motion in it is further complicated by the fact that the bowel is susceptible to damage. With the goal of designing a reliable and safe instrument, the motion model between the artificial anal sphincter and the rectum is developed, the biomechanical material properties of human rectum are analyzed. The results show that the deformation of the artificial anal sphincter can be controlled by the press of reservoir below the upper limit of human tissue ischemia.