A client's primary care provider has ordered an oral glucose tolerance test (OGTT) as a screening measure for diabetes. Which of the following instructions should the client be given?
A) "The lab tech will give you a sugar solution and then measure your blood sugar levels at specified intervals."
B) "You'll have to refrain from eating after midnight and then go to the lab to have your blood taken first thing in the morning."
C) "They'll take a blood sample and see how much sugar is attached to your red blood cells."
D) "You can go to the lab at any time; just tell the technician when you last ate before they draw a blood sample."
Ans: A
Feedback:
The OGTT measures the plasma glucose response to 75 g of concentrated glucose solution at selected intervals, usually 1 and 2 hours. A fasting blood glucose test requires 8 hours without food, and A1C measures glucose binding to hemoglobin. A casual blood glucose test is administered without regard for time or last meal.
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