blood, for a 70 year old, 6' 3", 200 pound, seemingly healthy man that had a colonoscopy 30 years ago.] What is the key question to ask if one decides to select a doctor that would do a colonoscopy? Thanks for your time.
Colonoscopy is still the best tool for examining the large intestine. Because of the age I would ask the GI if he is healthy enough to endure the test.