Blood Tests for Diabetes Diagnosis: Glucose Challenge
Also known as: GCT; 50 gram glucose challenge; one-hour glucose screening test.
What is it? A screening test that measures blood glucose levels one hour after 50 grams of a glucose solution has been consumed (an extremely sweet drink). If the GCT is elevated, it indicates the need for further testing.
Why is this test performed? To screen for gestational diabetes in pregnant women considered "at risk."
How frequently should this test be performed? Once. If results are abnormal and glucose levels elevated, it should be followed up by a 3-hour oral glucose tolerance test (OGTT).
What is the "normal" range for results? Normal values are 140 mg/dl or less.
What do abnormal results mean? A glucose threshold value >140 mg/dl (7.8 mmol/l) means that gestational diabetes is a possibility and an OGTT is indicated.
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Oh boy. That's about all I have to say about the two days I've just had. I had been unable to get an in-range sugar for over 48 hours. Two full days. No sugars in the 80-150 sweet spot. Everything either elevated or too low. And it is making me bananas. Since 90% of the sugars have been out of range on the high side, I tried a few things to eliminate outside factors. I took an anti anxiety medication midway through the day yesterday when I realized my climbing sugars...