There are two types of colonoscopy: painless colonoscopy and common colonoscopy. Generally, painless colonoscopy takes about 2 hours and common colonoscopy takes about 1 hour.
When ordinary colonoscopy is performed, the colonoscope needs to be inserted through the anus to clarify the mucosal condition of the intestinal wall and to observe whether there is serious inflammation, ulceration, bulge, obstruction, tumor, etc. It usually takes about 1 hour to finish.
Painless colonoscopy, on the other hand, requires general anesthesia before the colonoscopy, and at the same time, it needs to pass the postoperative wakefulness stage after the examination, so painless colonoscopy takes about 2 hours.
At the same time, the time of colonoscopy will vary with different equipment in different hospitals, different examination ability of doctors and different conditions of patients, so the specific examination time can be consulted with specialized doctors.