On the end of the tube is a light and a camera this sends pictures to a monitor. Concentrating on slow, deep breathing helps. This is uncomfortable and you may have some crampy pains. Then the doctor puts a long flexible tube called a colonoscope into your back passage and up into your large bowel. On the day you can drink clear fluids until two hours beforehand.įor the test you lie on your left side and you may have some medicine to make you sleepy and some painkillers. This causes diarrhoea so it’s best not to make any plans that day and to stay at home close to a toilet. Your bowel needs to be empty for the test, so the day before you don’t eat solid food but should continue to drink plenty of clear fluids. Take a look at this short video about having a colonoscopy.Ī colonoscopy is a test to look at the inside of your large bowel. This is called chromoscopy.Ĭolonoscopies can be uncomfortable but shouldn't be painful. You might also have a dye sprayed onto the lining of the bowel to show up any abnormal areas. If they see any growths (polyps) they remove them with a wire loop put down the colonoscope. And the endoscopist can remove tissue samples (biopsies). The endoscopist may press on your stomach or change your position to help the tube pass through your bowel.ĭuring the test they take photographs of your bowel lining. The endoscopist puts a small amount of gas into your bowel to help see all the bowel lining. The tube bends easily so it can pass around the curves in your bowel. The colonoscope goes into your back passage (rectum) and passes into your bowel. You lie on your left side with your knees drawn up towards your chest. This is a fast acting pain relief that you breathe in through a mouth piece. Some hospitals use gas and air (Entonox). You're offered painkillers and a medicine to relax you, these make you drowsy (sedation). You have these as injections into a small tube (cannula) in your vein. You wear a hospital gown and might also wear paper shorts with an opening at the back. This is a good time to ask any questions you may have. They'll explain the procedure to you and ask you to sign a consent form. You usually have a colonoscopy as an outpatient in the endoscopy department at the hospital.īefore the procedure you’ll see your endoscopist. You’ll receive clear instructions about what you can and can’t eat or drink before this test. You'll be given other instructions to follow. If you take iron tablets or other medicines that can make you constipated, you might need to stop these a week before the test.Ĭontact the endoscopy unit as soon as possible before your appointment if you take medicines to thin your blood or you are diabetic.
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