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Objective To develop a new implantable artificial anal sphincter system (AASS) for

the treatment of fecal incontinence.Methods The system was composed of internal execution

prosthesis，external control module and wireless transcutaneous energy transmission system

(TETS).Wireless communication was used for the data transmission between the internal and

external.Once the rectal pressure exceeded the threshold，an alarm signal was sent to the

external to remind the patient for defecation.Patients controlled the internal execution

prosthesis to open or close the rectum through the external control module and the internal

execution module was charged through TETS.The system was implanted into a pig to evaluate the

stability of each part.After 15 days the pig was dissected to observe the changes and the

diarrhea and rectum blood experiments were conducted in vivo.Results External control module

achieved the real-time control of internal execution prosthesis.The internal execution module

could sustainably work 24 h after charging 3 h through TETS.Diarrhea experiment showed that

when the pressure of 7.16kPa was applied on the intestinal wall (normal anorectal resting

pressure：6.26-9.47kPa)，the prosthesis could effectively suppress the leakage of intestinal

contents.Conclusions AASS could simulate the function of normal sphincter，as a new solution

for patients with severe fecal incontinence.