Daily the external fistula
opening was flushed with Povidone iodine mixed normal saline daily till closure.
Those who presented late were females with an external fistula
that was mistaken for a normal anus.
The excess tract was excised and the cut end was sutured with the anal canal mucosa, thus converting an external fistula
into an internal one, where the secretions from it can be retained by the external anal sphincter, thus preventing constant soiling.
of the main parotid duct; the alternative procedure.
At examination under anaesthesia, 5 patients were found to have multiple external fistula
openings, and 2 had a single external opening.
Once perforated, it may drain into the peritoneal cavity, adjacent viscera or less commonly adhere to the abdominal wall to form an external fistula
arising from the digestive tract.
Welch; External Fistulas
Arising From the Gastro-intestinal Tract; Ann Surg.