Hi Bronx,
Yup.........had a fluoroscopy scan done to check out my disconnected colon a while ago. I'm assuming they want to assess your colon too, and it's good for that. First thing to know is that a fluoroscopy is a continuous series of X-rays, not a single exposure like a chest X-ray. It's viewed in real time on a monitor, and typically requires you to have contrast in the area they're viewing. For your colon that would mean they'll ask you to give yourself an enema with contrast just before they start the scan, and you'll have to hold it in while they do the scan. Yeah, not fun........but the scan is usually pretty quick, so you'll make it just fine. Now if they're imaging your colon, and it's not connected to your small bowel.........then there's no reason you couldn't eat right up to the test..........so you might want to ask them about that. And make sure to tell the radiologist, or the person preparing you for the scan, that you have an ostomy. They'll be asking you to move around a bit on the table while they scan and need to know you can't lay on your bag........unless of course you can.........but tell them anyway.
When the scan starts you'll probably be able to see the imaging screen during the test, and it's pretty cool to watch as you move around.........and like I said above, the test is usually pretty quick. And the quicker the better because you're going to be getting exposed to a lot of radiation........way more than a couple chest X-rays. Depending on the length of the scan it can be from like 25 chest X-rays up to 10,000 X-rays, depending on what they need to see. They have both pulsed and continuous scanners, so they can adjust the frame rate and the dosage per image. But your doc and the radiologist know this, and they'll keep you safe, so don't fret. But that's why the scan is pretty quick.
Once the scan is over you simply head over to the toilet and get that contrast out of you. Depending on what contrast they use they may ask you to then flush with a saline enema as a rinse, just to make sure it's all out of your colon. So overall it's a pretty easy test, but maybe not the most fun you can have in a hospital. But you'll be just fine, and have a great story to tell your friends when it's all over. Who wants to go through life without having had a fluoroscopy!! ;Cross that one off your bucket list!!
;O)