Overlapping anal sphincter repair for faecal incontinence due to sphincter trauma: five year follow-up functional results.

Disruption of the anal sphincter results from obstetric injury, ano-rectal operations or external trauma. Obstetric or surgical division of the sphincteric mechanism may not be immediately apparent and the clinical presentation of incontinence may occur several years later [1, 2]. Reconstruction of the sphincter using a fascial sling or direct end-to-end repair of the disrupted sphincter result in a high failure rate. Failure after direct end-to-end repair is usually caused by break down of the suture line owing to retraction of the muscle ends [3]. Parks advocated an overlapping repair [4] in which the disrupted ends of the sphincter were mobilised and wrapped around each other. This paper reports the results of overlapping sphincter repair for faecal incontinence resulting from trauma, after a 5 year follow-up period.