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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The commonest site of perforation during colonoscopy is -
assistant
The correct answer is  • Risks of colonoscopy: Perforation and hemorrhage
• MC site of bleeding after colonoscopy: Stalk after polypectomy.
• MC site of perforation during colonoscopy: Sigmoid colon
• Perforation can be caused by excessive air pressure, tearing of the antimesenteric border of the colon from excessive pressure on colonic loops, and at the sites of electrosurgical applications