Outcome of Modified Park's Technique for Treatment of Complex Anal Fistula

Treatment of complex anal fistula (CAF) can be associated with high rates of recurrence and fecal incontinence (FI). Park suggested drainage of the affected intersphincteric anal gland for treatment of cryptoglandular anal fistula; however, recurrence after this technique was high. We modified the original Park's technique by extending the internal sphincterotomy to ensure adequate drainage of the intersphincteric space. The aim of this study was to evaluate the incidence of recurrence and FI after modified Park's technique in treatment of CAF.

Adult patients of both genders with CAF were evaluated before undergoing modified Park's technique with Wexner continence score, clinical examination, and endoanal ultrasonography or MRI. Postoperatively, patients were examined every 2 wk until complete wound healing. The continence state was evaluated with Wexner continence score, and quality of life was assessed before surgery and at 6 mo postoperatively by Short Form-36 questionnaire.

Thirty-two patients (27 male) of a mean age of 38 y were included. Median follow-up was 12 mo. Two patients (6.25%) experienced recurrence and 5 (15.6%) developed complications. One patient (3.1%) developed new-onset FI postoperatively. Twenty-eight (87.5%) patients were completely satisfied with the procedure. Quality of life showed significant improvement at 6 mo postoperatively.

The modified Park's technique is a promising procedure for the treatment of CAF with low recurrence and FI rates, and improved quality of life.