Abstract

The magnetic anal sphincter (MAS) is a recent surgical innovation for severe faecal incontinence (FI). With its place in the treatment algorithm of FI yet to be defined, we report a nonrandomized comparison between MAS and sacral nerve stimulation (SNS) in a single-centre cohort of patients with FI. Data were reviewed from prospective databases. From December 2008 to December 2010, 12 women [median age 65 (42-76) years], having FI for a median of 6.5 years, were implanted with a MAS. Sixteen women, of similar age, preoperative function scores, aetiology and duration of incontinence, and implanted with a permanent SNS pulse generator during the same period, served as a reference group. The duration of hospital stay, complications, change in incontinence and quality of life scores and anal physiology were compared between the two groups. The duration of follow up was similar [MAS = 18 (8-30) months vs SNS = 22 (10-28) months; P = 0.318]. Four patients with MAS experienced a 30-day complication, and the device was removed from one patient in each group. A significant improvement in incontinence (P < 0.001) and quality-of-life scores (P < 0.04) occurred in both groups. Mean anal resting pressure increased significantly in patients implanted with a MAS (P = 0.027). In this single-centre nonrandomized cohort of FI patients, MAS was as effective as SNS in improving continence and quality of life, with similar morbidity. These results can now serve as a prelude to a randomized trial comparing the procedures.

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