Urinary fistula after gynecological surgery means urine is escaping through an abnormal connection created by bladder, ureteric or urethral injury. After hysterectomy, the most important possibilities are vesicovaginal fistula from bladder to vagina and ureterovaginal fistula from ureter to vagina. Continuous watery vaginal leakage is the key symptom, but fever, flank pain, wound or drain leakage and hydronephrosis can also occur. The source must be identified before treatment because a bladder fistula, ureteric injury and ordinary urinary incontinence require different treatment.

Types of urinary fistula after pelvic surgery

Symptoms that should raise suspicion

• Continuous vaginal wetness unrelated to cough or urgency.
• Leakage beginning after hysterectomy, Caesarean section or pelvic surgery.
• Normal voiding plus continuous vaginal leakage.
• Flank pain or fever suggesting ureteric obstruction.
• Urine-like fluid from a surgical drain or wound.
• Persistent irritation and recurrent UTI.

How diagnosis is made

• Pelvic/speculum examination.
• Bladder dye test.
• Cystoscopy.
• CT urography with delayed images when ureteric injury is possible.
• Retrograde pyelography or nephrostogram in selected ureteric injuries.
• Creatinine testing of suspicious drain fluid in selected postoperative situations.

Why the exact type matters

Treatment is staged around safety

If there is infection, obstruction or poor kidney drainage, those problems are treated first. Definitive fistula closure or ureteric reconstruction is then planned after anatomy and tissue quality are understood.

Emotional and practical impact

Continuous urine leakage can be socially and emotionally exhausting. It is a medical complication that deserves structured evaluation; pads alone are not a definitive diagnosis or treatment when postoperative fistula is suspected.

Why combined urology-gynaecology information helps

Operative notes from the original hysterectomy or pelvic surgery can identify where dissection was difficult, whether a ureter was stented, whether bladder entry occurred and whether thermal energy was used near the ureter. This information can narrow the search even when the injury was not recognised at the time.

Bring discharge summaries, drain-fluid creatinine if tested, CT images, cystoscopy notes and any nephrostomy or stent records. For cancer surgery, histopathology and radiation history also matter because recurrent disease and irradiated tissue change reconstruction.

A multidisciplinary review is useful when there are simultaneous vaginal, bowel, oncological or pelvic-floor issues. The reconstructive objective is not simply to stop leakage but to restore safe urinary drainage while respecting the original pelvic condition.

What to bring for consultation

• Operative and discharge records from the hysterectomy, Caesarean section or pelvic surgery.
• CT urography, ultrasound or MRI images/reports if already performed.
• Cystoscopy, dye-test or ureteric stent records if available.
• Serum creatinine, urine routine and culture.
• A simple description of when leakage started and whether normal urination still occurs.
• Details of fever, pelvic pain, drain output, wound leakage or previous repair attempts.

Bladder fistula and ureteric fistula need different repairs

“Urinary fistula after gynaecological surgery” is a description, not an anatomical diagnosis. The common possibilities include vesicovaginal fistula (bladder to vagina) and ureterovaginal fistula (ureter to vagina); less commonly, urethrovaginal or vesicouterine fistulae occur. The pattern of leakage, dye testing and imaging help localise the source.

If coloured fluid placed in the bladder appears in the vagina, a bladder fistula is likely. If the bladder dye test is negative but leakage continues, upper-tract imaging with delayed contrast becomes important. Fluid creatinine can confirm that a drain/vaginal collection is urine when the diagnosis is uncertain.

Treatment then follows the anatomy. A small fresh bladder fistula may be given a trial of catheter drainage; established VVF usually needs surgical closure. Ureteric fistula may heal over a stent if continuity can be restored, otherwise nephrostomy and later ureteric reconstruction may be required. This is why persistent postoperative wetness should be investigated rather than treated empirically as ordinary incontinence.

Why diagnosis should not stop at “fistula positive”

Before repair, the surgeon needs to know the precise organs connected, the fistula’s position relative to the bladder neck and ureteric orifices, whether one or both ureters are obstructed, and whether there is radiation or recurrent disease. Missing a concomitant ureteric injury can turn an apparently successful bladder repair into persistent postoperative leakage.

Cystoscopy, vaginal examination and dye testing define many bladder fistulae. CT urography or other upper-tract imaging is added when ureteric involvement is possible. In complex or recurrent cases, MRI can help characterise soft tissues.

This anatomical discipline also prevents unnecessary surgery. A woman with stress incontinence after hysterectomy needs a very different operation from a woman with a vesicovaginal fistula, even though both report urine leakage.

How treatment differs by fistula type

A bladder-to-vagina fistula is usually repaired by separating and closing the bladder and vaginal defects. A ureter-to-vagina fistula may first be treated with a stent and, when necessary, ureteric reimplantation. A urethrovaginal fistula requires attention to the continence mechanism and any associated urethral stricture.

This distinction also changes postoperative tubes. VVF repair relies heavily on bladder catheter drainage; ureteric repair usually includes a DJ stent; complex combined injuries may need both, sometimes with nephrostomy. Asking “How long will I need a catheter?” therefore has no single answer until the fistula has been anatomically classified.

When prior radiation, cancer surgery or multiple failed repairs are present, healthy vascularised tissue may be interposed and the operation may be delayed until inflammation and necrosis have settled.

FAQs

Related reading

• Vesicovaginal Fistula: Symptoms, Diagnosis and Treatment
• Ureterovaginal Fistula After Hysterectomy
• Urinary Leakage After Hysterectomy: Could It Be a Urinary Fistula?
• Ureteric Injury During Gynecological Surgery
• Urologist in Latur

References

• European Association of Urology. EAU Guidelines on Non-neurogenic Female LUTS: Urinary Fistula, 2026 https://uroweb.org/guidelines/non-neurogenic-female-luts/chapter/disease-management
• European Association of Urology. EAU Guidelines on Urological Trauma, 2026 https://uroweb.org/guidelines/urological-trauma
• Thompson JC, et al. Repair of Vesicovaginal Fistulae: A Systematic Review. Obstet Gynecol. 2024;143:229-241. PMID: 38033311 https://pubmed.ncbi.nlm.nih.gov/38033311/