Clinical Scorecard: Anocutaneous Advancement Flap Surgery Outperforms Fissurectomy in Treating Chronic Anal Fissures: A Retrospective Observational Analysis

At a Glance

Key Highlights

• Anocutaneous advancement flap (AAF) surgery provides faster wound healing and symptom resolution compared to fissurectomy alone.
• AAF preserves anal sphincter function, avoiding the incontinence risks associated with lateral internal sphincterotomy (LIS).
• AAF is effective as a first-line surgical treatment for CAF regardless of patient gender, anal tone, or fissure location.

Guideline-Based Recommendations

Diagnosis

• Diagnosis based on clinical features including visible horizontal fibers of the anal sphincter at fissure base or fibrosis with/without sentinel pile.
• Chronicity defined by symptoms persisting beyond 8 weeks and presence of secondary morphological changes.

Management

• Conservative treatment for at least 12 weeks before considering surgery.
• Surgical treatment recommended if conservative management fails and patient desires intervention.
• Preferred surgical approach is fissurectomy with primary wound closure using anocutaneous advancement flap to preserve sphincter integrity.
• Avoid lateral internal sphincterotomy due to risk of long-term anal incontinence.

Monitoring & Follow-up

• Postoperative follow-up at 1 month to assess symptom resolution and complete wound healing via proctoscopy.
• Long-term monitoring up to 5 years for late complications, anal incontinence symptoms, and fissure recurrence.
• Patients advised to report any postoperative complications or recurrence promptly.

Risks

• Potential delayed wound healing if flap cannot be raised tension-free.
• Risk of postoperative complications such as anal abscess or fistula, though minimized with flap technique.
• Avoidance of sphincterotomy reduces risk of postoperative anal incontinence.

Patient & Prescribing Data

Patients with chronic anal fissure refractory to conservative treatment

Postoperative pain managed with chamomile sitz baths, NSAIDs (Dexketoprofen), and additional analgesics as needed; stool softening with fiber and psyllium husks recommended to facilitate healing.

Clinical Best Practices

• Perform fissurectomy without diathermy to excise chronic fissure and secondary changes while preserving sphincter.
• Raise a tension-free rectangular anocutaneous advancement flap with length–width ratio not exceeding 1.5:1 to ensure vascular supply.
• Suture flap to rectal mucosa with continuous monofilament sutures to achieve primary wound closure.
• Administer single-shot intravenous antibiotic prophylaxis at skin incision.
• Use local anesthesia and pudendal nerve block to reduce intraoperative pain.
• Advise adequate hydration, fiber intake, and stool softeners postoperatively to prevent constipation and facilitate healing.
• Schedule routine follow-up at 1 month post-surgery and monitor for complications or recurrence up to 5 years.

References

• Conservative and surgical treatment of chronic anal fissure
• Meta-analysis on lateral internal sphincterotomy and incontinence rates
• Techniques and outcomes of anocutaneous advancement flap surgery