Common causes of vesico-vaginal fistula?

Appeared in: HPSSC - 2015

Explanation

A vesico-vaginal fistula (VVF) has several well-documented causes, including surgical complications, direct obstetric trauma, and ischemic injury.
Caesarean section is a form of pelvic surgery and a known iatrogenic (surgically-induced) cause of VVF, particularly in complicated cases.
Trauma from instrumental delivery (e.g., forceps or vacuum) can cause direct laceration to the bladder and vaginal tissues, creating a fistula.
Ischemia and pressure necrosis from prolonged, obstructed labor is the classic and most common cause of VVF worldwide, especially in resource-limited settings.
Since all three preceding options are valid and common causes, the most comprehensive and correct answer is 'All of the above'.

Option A: While Caesarean section is a cause of VVF, it is not the only one. Selecting this option alone ignores other significant causes like direct trauma and pressure necrosis.
Option B: Trauma from instrumental delivery is a valid cause but represents only one mechanism of obstetric injury. It excludes surgical and ischemic causes.
Option C: Ischemia and pressure necrosis is the most common cause globally, especially from obstructed labor, but it is not the sole cause. It excludes iatrogenic and direct traumatic injuries.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Vesico-vaginal Fistula (VVF) as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in preventing obstetric fistulas by carefully monitoring the progress of labor using a partograph to identify and manage obstruction early.
A key nursing assessment is to investigate any report of continuous urinary leakage postpartum. Differentiating VVF from stress incontinence is critical for timely diagnosis and management.
Patient education on perineal hygiene is vital to prevent skin breakdown and infection from constant urine leakage.

How to Approach the Question

First, analyze the question stem. It asks for 'common causes' (plural) of vesico-vaginal fistula.
Evaluate each of the first three options (A, B, and C) to determine if they are valid causes of VVF.
Recall or use your knowledge base to confirm that Caesarean section (surgical injury), instrumental delivery (traumatic injury), and pressure necrosis (ischemic injury) are all established etiologies.
Recognize that since multiple options are correct, the most appropriate answer is likely an option that encompasses all of them.
Identify option D, 'All of the above', as the most comprehensive and accurate choice.

Concept Tested & Keywords

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E6 Gynecology Williams pp. 160-195, 161-197

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 56-70

Practise the full HPSSC - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.