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  • Title: Anal function after ligation of the intersphincteric fistula tract.
    Author: Tsunoda A, Sada H, Sugimoto T, Nagata H, Kano N.
    Journal: Dis Colon Rectum; 2013 Jul; 56(7):898-902. PubMed ID: 23739197.
    Abstract:
    BACKGROUND: Although the ligation of the intersphincteric fistula tract is a promising anal sphincter-saving procedure for fistula-in-ano, the objective assessment of the sphincter preservation remains unknown. OBJECTIVE: The primary end point was to measure the anal function before and after this procedure. The secondary end point measured was cure of the disease. DESIGN: This study is a prospective observational study. SETTING: This study was conducted at the Department of Surgery, Kameda Medical Center, Japan, from March 2010 to August 2012. PATIENTS: Twenty patients with transsphincteric or complex fistulas were evaluated. INTERVENTIONS: All patients underwent the ligation of the intersphincteric fistula tract with a loose seton for anal fistulas. MAIN OUTCOME MEASURES: Anal manometric study was performed before and 3 months after the procedure. Fecal incontinence was evaluated by using the fecal incontinence severity index. Failure was defined as nonhealing of the surgical wound or fistula. RESULTS: The median operation time was 42 minutes. No intraoperative complications were documented. The median follow-up duration was 18 (3-32) months. No patients reported any incontinence postoperatively. The median score of the fecal incontinence severity index before and 3 months after the procedure was 0. The median maximum resting pressure measured before and after operation were 125 (71-175) cm H2O and 133 (95-169) cm H2O. The median maximum squeeze pressure measured before and after operation were 390 (170-815) cm H2O and 432 (200-902) cm H2O. There were no significant postoperative changes in either the resting pressure or the squeeze pressure. Primary healing was observed in 19 (95%) patients, and the median healing time was 7 weeks; 1 wound remained incompletely healed. LIMITATIONS: Short-term follow-up may not justify the use of the term definitive cure. CONCLUSION: The ligation of the intersphincteric fistula tract with a loose seton showed no postoperative deterioration on anal sphincter function with favorable healing rates.
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