Electrically stimulated gracilis neosphincter for end-stage fecal incontinence: the long-term outcome.

Abstract

Electrically stimulated gracilis neosphincter is an established treatment for patients with end-stage fecal incontinence. Few data, however, describe its long-term efficacy. This study aimed to assess the long-term functional outcome associated with this procedure. Patients who underwent gracilis neosphincter construction between1989 and 2001 were identified from a prospectively recorded database. Demographics and pretreatment anorectal physiologic data were available for all patients. This study was conducted at an academic colorectal unit in a tertiary center. Sixty patients (median age, 42 years; 46 females) with fecal incontinence and a Williams continence score ≥5 were recruited to the study. The causes of incontinence included obstetric injury (n = 22), anal surgery (n = 17), atresia (n = 7), idiopathic incontinence (n = 6), anorectal excision (n = 4), and ileoanal pouch incontinence (n = 4). The primary outcomes measured were the Williams continence score and the proportion of patients with a Williams score ≤3 who avoided permanent stoma formation. Continence improved for the cohort postoperatively at 2 years (2(2-5); p < 0.001) but no significant difference was found between continence scores preoperatively and at 13 years (5(3-6); p = not significant). However, a sustained improvement at 13 years was noted for patients in the anal surgery (3(2-5);p < 0.001) and obstetric injury groups (4.5(3-6); p = 0.001). Twenty-six patients (43%) had a Williams score ≤3 and avoided permanent stoma after 13 years. Eighteen patients developed postoperative rectal evacuatory disorder; 10 of them required a conduit to facilitate colonic irrigation. Postoperative evacuatory disorder was more frequent in patients with a history of obstetric injury (p = 0.008). This study was limited by the lack of bowel diaries and quality-of-life scores. Gracilis neosphincter is associated with clinically significant and sustained symptom improvement in patients with end-stage fecal incontinence secondary to obstetric injury or anal surgery. These data support the continued use of this procedure in highly selected patients.