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PTH-021 Magnetic Anal Sphincter – a Novel Surgical Option for Management of Faecal Incontinence
  1. R Tevlin1,2,
  2. A Hanly1,
  3. J Larkin1,
  4. R O’Connell1,3
  1. 1Colorectal Surgery, St. Vincent’s University Hospital
  2. 2Royal College of Surgeons in Ireland
  3. 3Department of Surgery and Surgical Specialities, University College Dublin, Dublin, Ireland


Introduction Faecal incontinence (FI) is a common and distressing problem with diverse aetiology and a significant economic burden1,2. First-line therapy includes dietary modification, medication and biofeedback. Surgical options include sphincteroplasty, artificial bowel sphincter insertion, sacral nerve stimulation and stoma formation3.

Recently, magnetic sphincter augmentation has been used successfully in gastro-oesophageal reflux disease4. A magnetic anal sphincter (MAS)(Torax Medical, Mn, USA) have been developed to reinforce an incompetent anal sphincter in FI. The MAS device consists of magnetic cores hermetically sealed within a series of titanium beads interlinked on independent titanium wires, forming a ring that rests around the external anal sphincter. The force required to separate the beads is approximately 100g, equivalent to normal defaecatory force5.

Methods Three multiparous females (47–54 years) with severe FI had MAS devices implanted under general anaesthesia. Two had failed neuromodulation, one had a failed sphincteroplasty and one incontinence after neo-chemoradiotherapy and colo-anal anastomosis for cancer. A curved, anterior perineal incision allowed creation of an extrasphincteric circumanal tunnel. Under fluoroscopic guidance and with fastidious antiseptic technique, the appropriate size MAS was inserted. All were discharged the same day.

Results Two patients with obstetric aetiologies reported significant improvement in continence at 6 weeks (St. Mark’s Score 19 to 4 and 14 to 5 (24 = max worst score). The third patient, with anterior resection syndrome, developed a recalcitrant wound infection with subsequent device extrusion and explantation.

Conclusion MAS insertion is a novel, promising technique for management of FI. Further study is required prior to making definitive conclusions.

Disclosure of Interest None Declared.


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  3. Lehur PA, Mc Nevin S, Buntzen S, Mellgren AF, Laurberg S, Madoff RD. Magnetic Anal Sphincter Augmentation for the Treatment of Fecal Incontinence: A Preliminary Report From a Feasibility Study. Diseases of the Colon and Rectum 2010; 53:1604–1610.

  4. Use of a magnetic sphincter for the treatment of GERD: a feasibility study. Gastrointestinal Endoscopy 2008; 67(2):287–294.

  5. Bharucha AE, Croak AJ, Gebhart JB, et al. Comparison of recto-anal axial forces in health and functional defecatory disorders. American Journal of Physiology – Gastrointestinal and Liver Physiology 2006; 290:1164–1169.

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