What to expect...Glucose Tolerance Test (refer to Cystic Fibrosis Related Diabetes (CFRD) )
The test is done in several stages, each one is important to ensure the accuracy of your results. You may be asked to fast for 8 hours (may vary depending on type of diabetes being tested, medical condition, and doctor's preference), during this time you should only water and avoid consuming any food. Even the smallest bite of an apple can throw off your body's natural blood sugar levels and lead to a false positive/negative.
Upon your arrival, a certified staff member will take a sample of your blood to find your "baseline" sugar levels. They might prick your finger tip or draw blood from a vein. This sample is referred to as a fasting blood glucose level.
Next, you'll be asked to drink a special glucose mix. Sometime (if you're lucky!) they'll give you a few options for flavors, orange, lemon lime, or grape are some of the flavors I've had. To be honest, they aren't that delicious. Think of it like a flat fanta or sprite! You'll have to wait an hour then they'll prick you or access your veins again. Sometimes it's best to ask for an IV so they can draw blood without pricking you 10,000 times. It's totally up to you and the nurse to determine if this is an option or if it's recommended. Your blood will be drawn at hours 1, 2, and 3!
Depending on your results, your doctor may request another test or refer you to a nutritionist.
sidenote: I would recommend bringing a good book, iPad, or something to keep you occupied while you wait! Also, during my last GTT, I felt so lightheaded from fasting that I was unable to drive home. Fortunately, I had a friend drive me to the appointment so I didn't have to worry about not being able to make it back safely. Plan a yummy lunch immediately after! Be sure to drink plenty of water. If you're dehydrated, your veins won't be as easy to access! Good luck!
*this information is based solely off of my personal experiences*
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