A colonoscopy carries a 1 in 1000 risk of perforation. Should a perforation occur, it often requires immediate surgery to repair the perforation. In some instances, a stoma is required to allow the damaged colon to heal.
As such, a colonoscopy should not be considered a “simple” or “risk-free” procedure as the consequences of a complication from the scope can be morbid, with the need for multiple surgical procedures to treat.
To understand more about colonoscopy in Singapore, you can refer to The Complete Guide To Colonoscopies In Singapore (2018).