title: Assessment and in vitro experiment of artificial anal sphincter system based on rebuilding the rectal sensation function.
abstract: In this paper, a novel artificial anal sphincter (AAS) system based on rebuilding the rectal sensation function is proposed to treat human fecal incontinence. The executive mechanism of the traditional AAS system was redesigned and integrated for a simpler structure and better durability. The novel executive mechanism uses a sandwich structure to simulate the basic function of the natural human anal sphincter. To rebuild the lost rectal sensation function caused by fecal incontinence, we propose a novel method for rebuilding the rectal sensation function based on an Optimal Wavelet Packet Basis (OWPB) using the Davies-Bouldin (DB) index and a support vector machine (SVM). OWPB using a DB index is used for feature vector extraction, while a SVM is adopted for pattern recognition.Furthermore, an in vitro experiment with the AAS system based on rectal sensation function rebuilding was carried out. Experimental results indicate that the novel executive mechanism can simulate the basic function of the natural human anal sphincter, and the proposed method is quite effective for rebuilding rectal sensation in patients.
authors.affiliation: School of Mechatronics Engineering and Automation of Shanghai University, Shanghai Key Laboratory of Power Station Automation Technology, Shanghai - PR China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zan
authors.forename: Jinding
authors.initials: J
authors.lastname: Liu
authors.forename: Enyu
authors.initials: E
authors.lastname: Jiang
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
mesh_terms: D001003:Anal Canal / Q000503:physiopathology*; D003672:Defecation / Q000502:physiology*; D005242:Fecal Incontinence / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D066298:In Vitro Techniques; D019736:Prostheses and Implants; D011474:Prosthesis Design; D012677:Sensation / Q000502:physiology*