Since the early 1900s, skeletal muscle transpositions have been employed for complicated cases of fecal incontinence to augment or replace the anal sphincter. Multiple techniques have evolved that vary with the type and configuration of muscle used in the reconstruction. Transposition of the gluteus maximus muscle was popular in the early stages of development but was replaced by techniques involving transposition of the gracilis muscle. Within the past 16 years, electrical stimulators have been applied to the transposed muscle flaps to create a dynamic reconstruction improving the efficacy of these neosphincters over their static counterparts. However, the stimulated versions are technically demanding with a high rate of morbidity secondary to complications of the multiple components and variations in technique. The stimulator used in this procedure has been removed from the US market, although it is still available in other countries. Currently in the United States, gracilis transposition is still employed in the absence of an electrical stimulator as an adjunct to the artificial bowel sphincter (Acticon Neosphincter TM , American Medical Systems, Minnetonka, MN), such as in cases of severe muscle loss and congenital atresia. In European countries, the stimulated graciloplasty continues to evolve, leading to expansion of its use in total anorectal reconstruction for anal atresia and after abdominoperineal resection.
KEYWORDS: Fecal incontinence, muscle transposition, graciloplasty, gluteoplasty, neosphincter constructionObjectives: Upon completion of this article, the reader should be able to: (1) list current therapeutic options for failed overlapping sphincteroplasty; and (2) evaluate the results of each of these procedures.Patients with severe fecal incontinence unresponsive to conservative measures can be divided into two broad categories of surgical approach. The first group includes those patients with an identifiable anatomic sphincter defect who can expect a 40 to 60% long-term surgical success rate with overlapping sphincteroplasty.1 The absence of pudendal neuropathy yields the best outcome in these patients. 2 The second group includes those patients with extensive sphincter damage, muscle loss, or pudendal neuropathy not amenable to direct sphincter repair. With the widespread prevalence of fecal incontinence and development of newer surgical techniques, the patient with severe fecal incontinence is seldom obligated to a permanent stoma. Neosphincter