Most useful investigation for VVF: (A) Three swab test, (B) Cystoscopy, (C) Urine culture, (D) IVP
Answer is B. Big fistula Fistula tract is available Obvious escape of urine Tiny fistula Dye test Knee chest position: Escape of bubbles on coughing Three-swab test Gold Standard Cystoscopy Ref: D.C.DUTTA&;S TEXTBOOK OF GYNAECOLOGY; 6th edition; Pg no: 420