A 35-year-old woman from rural India presents with continuous leakage of urine from the vagina 3 weeks after a prolonged obstructed labour and difficult vaginal delivery. Methylene blue test confirms a vesicovaginal fistula (VVF). The fistula is 1.5 cm, located 2 cm above the interureteric ridge, with surrounding tissue inflammation. What is the optimal timing for surgical repair?

• A Immediate surgical repair within 72 hours of identification provides the best outcomes when the fistula is detected early
• B Delay repair for 3–6 months after delivery to allow tissue inflammation to resolve, fibrosis to mature, and oedema to subside before surgery ✓
• C Repair should be performed at exactly 3 weeks post-delivery using the 'Rule of 3's' approach
• D Repair at 4–6 weeks is optimal for obstetric VVF as tissues are inflamed for 3 weeks but recover by 4 weeks

Explanation

For obstetric VVF resulting from obstructed labour (ischaemic necrosis), the traditional and still widely accepted approach is to delay repair for 3–6 months. This allows: resolution of tissue oedema and inflammation, softening of periurethral/perivesical fibrosis, demarcation of the fistula edges, revascularisation of ischaemic tissue, and preparation of the patient (nutritional optimisation, infection treatment). Immediate repair (<72h) is appropriate only for iatrogenic (surgical) fistulas identified intraoperatively. The 'Rule of 3's' (3 months, 3 cm, 3rd repair) is a traditional teaching aide but not evidence-based. Contemporary data from fistula centres support 3-month minimum wait for obstetric fistulas.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

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Written and medically reviewed by the StethoPrep medical team.