Development of situ intelligent artificial anal sphincter and observation on its efficacy

Abstract:

Objective：To develop a ergonomics situ intelligent artificial anal sphincter（IAAS） with bio-feedback function and to observe its fecal continence function. Methods：Function of the IAAS was assessed in vitro and in vivo in New Zealand rabbits. Physiological saline was infused into the bowel to simulate the formation of stool. Simultaneously，function of the pressure feedback system and the bowel-restrained function of L-style artificial anal sphincter were observed. Results：Pressure of the feedback cuff was positively correlated with the pressure and volume of the bowel within a certain range；the pressure feedback system can reflect the change of the intraintestinal pressure effectively. L-style artificial anal sphincter can control fecal incontinence under the control of chip micro－computer. Conclusion：IAAS could efficiently maintain continence and reflect the change of the intraintestinal pressure.