Colonoscopy is a method to investigate the inner lining of a person’s large intestine. 
It can be done as a screening test for colon polyps or for cancer. 
It is recommended to have a colonoscopy in the case that you find blood in your bowel movements, history of colon cancer/polyps, or others.  
Colonoscopy preparation includes fasting and drinking a special solution that empties your colon.  
Patients are sedated through during the procedure. 
Patients stay in the recovery room after for about 30-60 minutes and then can be sent home.