The colonoscope is completely cleaned and disinfected between each patient to avoid the risk of transmission of serious diseases such as HIV or hepatitis.

Serious complications of colonoscopy are rare, at less than one in 3,000 examinations.

However, complications can occur and include the following:

• Colonoscopy is considered to be a very accurate test. However, there is a risk that an abnormality may not be detected.
• Intolerance to the bowel preparation. Some people develop dizziness, headaches or vomiting.
• Reaction to the sedative. This is very uncommon but is especially of concern in people who have severe heart disease or lung disease.
• Perforation (making a hole in the bowel).
• Significant bleeding from the bowel, usually after polyp removal.

It is possible if these serious complications occur that you may require surgery or a blood transfusion.

Rare side effects can occur with any procedure. Death is extremely rare.

If you wish to have further details please discuss this with your endoscopist before the procedure.

If you have any of the following symptoms in the hours or days after colonoscopy you should contact Endoscopy Auckland or your specialist immediately: severe abdominal pain, black tarry motions, persistent bleeding, fever or other symptoms that cause you concern.