CONSENT FOR COLONOSCOPY
Colonoscopy is an invasive test to examine the large bowel or colon. A long, thin, flexible tube is inserted through the anus to inspect the large bowel. An anaesthetic (sedative) is given to ensure that no pain is felt during the procedure. Biopsies (tissue samples) are often taken and sent to a pathologist.
Prior to your appointment you will be given a bowel preparation kit which will thoroughly clean your bowel and allow it to be successfully examined. If you have any serious heart, chest, kidney or other medical problems, are diabetic or taking anticoagulants (blood-thinners), special precautions will need to be taken to reduce any possible risk. You should inform the specialist who will be performing the procedure, BEFORE beginning the bowel preparation.
Cancer of the large bowel can arise from pre-existing polyps (benign wart like growths). Therefore, if any polyps are found, they are usually removed at the time of the procedure, while you are still sedated.
No single medical test is 100% accurate, and rarely, because of the anatomy of the bowel, or issues related to preparation, a small cancer or other lesion (abnormality) can be missed. Rarely, colonoscopy cannot be completed, due to bowel disease or other problems.
There are alternative tests to colonoscopy. Each treatment option has its own benefits and risks. You should discuss these with your doctor.
Complications:
For inspection of the bowel alone, complications are uncommon. Results from surveys, and from experience at our facility, show the chance of serious complications to be 1 in 1000 procedures or less. The risk of complications is higher, when patients are elderly or have other serious medical problems, when polyps are removed or when other extra procedures need to be performed.
Minor complications include:
Bloating, nausea, throat and abdominal discomfort that can occur after the procedure. These are minor problems and generally settle promptly. Rarely, pain will last for a longer period of time and will require more extensive investigation and treatment.
Intolerance to the bowel preparation can cause headaches, weakness and fainting. This is also a common problem which usually settles after the procedure.
Occasionally patients can have bruising or pain at the site where sedatives have been injected.
Serious complications include, but are not limited to:
Reaction or allergy to the sedatives and other medications used during the procedure.
Perforation (making a hole in the wall of the bowel) and major bleeding. These are rare, but if they occur, may require hospitalisation, emergency surgery, blood transfusion or other treatments. Bleeding can occur up to 14 days after the procedure.
Aspiration (vomiting of the stomach contents into the lungs) is also a rare complication, which may require hospitalisation.
Every attempt is made to protect the teeth, but on rare occasions, damage to teeth, crowns, plates and other dental devices can occur. A hoarse voice can also occur rarely. The doctors and the hospital cannot be held responsible for such damage.
Death, although extremely rare, is a possible consequence of any medical procedure. If you want further details of every rare complication, then you should indicate this to your doctor, before undertaking the procedure.
IF YOU DO NOT UNDERSTAND ANY OF THE ABOVE INFORMATION, OR HAVE FURTHER QUESTIONS OR CONCERNS, PLEASE TELEPHONE TO ARRANGE AN APPOINTMENT WITH THE SPECIALIST WHO WILL BE PERFORMING THE TEST.