The subject should remain seated and not smoke throughout the test. Separate serum or plasma from cells within 45 minutes of venipuncture. Label each tube with patient's name and time interval. Storage Instructions Refrigerate Patient Preparation Patient should not smoke, but should be active and eat a regular diet that includes at least 150 grams of carbohydrate daily for 3 days, and then fast 12 hours prior to the test.
Many drugs interfere with test results.
The patient should not be stressed. Diagnosis of diabetes mellitus in nonpregnant adults should be restricted to those who have one of the following. Diagnosis of impaired glucose tolerance in nonpregnant adults should be restricted to those who demonstrate all of the following.