It can cause lung abscess, pulmono pleural fistula, empyema lung and broncho pleural fistula. Complications such as abscess formation, fistula formation, and perforation of the colon may require surgery. An arteriovenous fistula can increase preload. Surgery for abscess or fistula is indicated either urgently or electively. It is a type of arteriovenous fistula. Women with obstetric fistula face severe mental health issues. It is surgically corrected, with resection of any fistula and anastomosis of any discontinuous segments. Young mothers also have an increased risk of developing obstetric fistula. It is a common symptom of gastrojejunocolic fistula and intestinal obstruction in the ileum. It is also very useful in cases of urethral fistula. Tracheoesophageal fistula (TEF) represents an abnormal opening between the trachea and esophagus. Two died from pericardial tamponade and one was from an aortoduodenal fistula. Any part of the tract can persist, causing a sinus, fistula or cyst. Before this, surgery had focused on creating a fistula for drainage of gallstones.