Objective: The primary aim of this study was to assess the outcome of advancement anoplasty in the treatment of chronic anal fissure, resistant to conventional therapy. The secondary aim was to evaluate the anal resting pressure in these patients with resistant fissures.
Patients and methods: Over a five-year period eight patients (2 male, median age 55 years, range 20-74) with resistant anal fissure were referred from 6 centres. They had endured symptoms for a median of 8 years (range 2-20) and had undergone a median of 2 previous surgical procedures (range 1-3), including lateral sphincterotomy and anal dilatation. Anorectal physiological testing was performed on all patients who then underwent advancement anoplasty. The outcome was analysed retrospectively.
Results: Pre-operative anorectal physiological testing showed a significantly lowered median maximal anal resting pressure of 42 mm H2O (range 12-72 mm H2O, normal range > 60 mm), P=0.03. All patients underwent advancement anoplasty. At a median of seven months follow-up (range 2-22) seven of eight patients had healed their fissure and were asymptomatic. The median healing time was four months (range 2-6).
Conclusion: Patients with chronic anal fissure, resistant to conventional therapy, may be successfully treated by advancement anoplasty. Healing time however, may be prolonged. In this series patients had a decreased anal resting pressure rather than anal hypertonia.