do I prepare for the test?
- Tell your doctor before the test if you have ever had an allergic
reaction to x-ray dye (IV contrast dye). Also let your doctor
know if you could be pregnant. If you have diabetes and take
insulin, discuss this with your doctor before the test.
On the day before your test, you should drink plenty of fluids.
This will help prepare your kidneys for the job of clearing out
the dye the next day.
Your doctor will instruct you to eat a special diet the night
before the test, so that you have less solid stool in your large
intestine. (Large amounts of stool in the intestine can make
it harder to interpret your x-rays.) Typical instructions might
include using a laxative in the afternoon before your test and
limiting your dinner the night before to clear liquids such as
broth and juice.