A colonoscopy is a visual examination of the rectum and colon to determine the presence of abnormalities in these regions and it is performed using a colonoscope. A colonoscope is a flexible tube about the size of a finger. It is fitted with a camera and connected to a TV screen. The specialist can guide the colonoscope through the rectum and colon with a view to determining the presence of abnormalities in the mucous membranes. Using a small pincers inserted through the colonoscope, the physician can take samples from the mucous membrane and remove polyps. This is painless.
Before a colonoscopy, there are a few things that you need to be aware of.
To ensure the successful performance and results of the examination, it is imperative that the bowel is emptied completely before the examination. Thorough bowel cleansing is therefore required.
The days leading up to the examination: Stop ingesting kernels and seeds in the week prior to the colonoscopy. This includes seeds in fruit and vegetables for example kiwi, tomatoes and quinoa.
The day before the examination
At 1 PM: You may eat a light lunch. After lunch, you may only ingest a liquid diet until after the examination. At 7 PM: For dinner, drink at least 1 glass of ‘clear liquid’. Clear liquid includes water, cordial, fizzy drinks, clear broth, juice without fruit pulp and coffee/tea without milk.
First dose: In close proximity to your dinner, drink 1 sachet of PicoPrep® dissolved in a large glass of water (150ml). Then drink a further 1⁄4 liter of liquid. You are welcome to drink as much clear liquid as you like. During the rest of the evening, you must drink at least 3 glasses of clear liquid before going to bed.
On the day of the examination
At 8 AM: As breakfast, drink at least one glass of clear fluid.
Second dose: In close proximity to the breakfast, drink 1 sachet of PicoPrep® dissolved in a large glass of water (150ml). Then drink a further 1⁄4 liter of liquid. You are welcome to drink additional clear liquid until the time of the examination.
It is important to stay hydrated and drink lots of fluid during the bowel cleanse.
You will lie on your left side during the examination. The colonoscope is inserted into the rectum and up into the colon. The full length of the colon will be examined. A puff of air is pumped into the colon to ensure that the folds are open and that the physician can examine the colon walls systematically. You may find this causes discomfort and bloating. The physician will release some of the air at the end of the examination and the discomfort will dissipate. The examination takes approximately 45 minutes.
To minimize discomfort, a combination of analgesic and sedative can be administered at the beginning of the examination.
You may eat and drink normally after the examination.
If you have been given a sedative, you may not drive a car for the rest of the day. If a biopsy was taken, the results will be available within 1-2 weeks.
A colonoscopy is a very safe examination, which very rarely causes complications. Taking samples from the mucous membrane may result in small amounts of blood in the stool within the first 24 hours.
In extremely rare cases after removal of a polyp, severe bleeding or colon perforation may occur. In that case, contact the clinic or the nearest emergency room immediately.
The medicine can result in forgetfulness and you might forget what has been told. You will therefore receive written information about the results of the examination afterwards. You are also welcomed to bring a relative along.
Try to get both salt (stock) and sugar (soda) throughout the day.