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2927R.GP Preparing for a CT colonoscopy

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You have been invited for a CT scan of your large bowel, to help in the diagnosis of your condition. CT, or computed tomography, is a special type of X-ray, which allows us to see soft tissues and bones inside your body. CT scans are quick, painless and generally safe. The amount of radiation you're exposed to during a CT scan varies, depending on how much of your body is scanned. The scanners are designed to minimise your exposure to radiation, but if you have any concerns please ask your doctor or radiographer about the potential risks. There are some important things you need to address before you come for your scan. Please let us know before your appointment if you have any mobility problems for which you may require assistance, or if you need to arrange transport to or from the hospital. Also, let us know if you are pregnant, think you may be pregnant, or are breastfeeding. You will have to remove any jewellery or hair clips, so it’s best to leave these at home. For CT colonoscopies there are some important procedures that you must follow in the days leading up to your scan. Firstly, if you take iron tablets, please stop these for seven days before the date of your scan. You can continue to take all of your other medicines as normal, with a small amount of water. In the week leading up to your scan you will be given a bottle of Gastrograffin. Gastrograffin is a dye that makes your bowel clearer on the scans. It can cause you to have a lose bowel movement a few hours after you have taken it, so we advise that you are close to a toilet. Sometimes Gastrograffin can make you feel sick, or can cause a skin rash. In rare cases, people are allergic to Gastrograffin. If you have any concerns, please speak to your doctor or ring the Radiology Department. Two days before your scan, eat and drink as normal. At 6 o'clock in the evening, take half of the 100 millilitre bottle of Gastrograffin, with water or cordial to taste. On the day before your scan, do not eat any solid food. Clear soup, meat extract soups or clear jelly and two cups of normal, not diet, lemonade at meal times are good alternatives. Drink approximately two cups of clear liquid every hour whilst you are awake to avoid dehydration. clear liquids include water, black tea or coffee, squash, carbonated drinks and clear soups. At 6 o'clock in the evening, take the remaining half of the 100 millilitre bottle of Gastrograffin with water or cordial to taste. On the day of the examination, do not have any solid food. For breakfast you can have clear soup, meat extract soups, clear jelly, or two cups of normal, not diet, lemonade. Don’t eat anything after 9 o'clock in the morning. Again drink approximately two cups of clear liquid every hour. After your scan, you should drink plenty of clear liquids for the next two to three days. 
 If you have diabetes please contact the radiology department for guidance. Remember that if you have diabetes, not eating can put you at risk of having a "hypo". This is when your blood sugars become very low and you experience dizziness, headaches, sweating, shaking and blurred vision. Make sure you have glucose drinks on hand to treat these symptoms if they occur. Suitable glucose drinks include fizzy drinks and fruit juices. Do not use diet, or sugar free drinks. And make sure you have one of the recommended replacement foods, such as clear jelly or soup, at mealtimes. You are now ready for your scan and should watch the second video in the series called “Having a CT Colonoscopy”.

Video Details

Duration: 4 minutes and 50 seconds
Language: English
License: Dotsub - Standard License
Genre: None
Views: 2
Posted by: richardwh on Jan 20, 2017

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