22661 Glucose Tolerance, Gestational Screen

This test can be performed at any time of the day in a fasting or fed state. Administer 50g of oral glucose load and draw blood 1 hour after glucose challenge. Separate plasma or serum from cells within 60 minutes of venipuncture. Refrigerate if specimen are collected in tube other than gray top. Whole blood specimens in gray top tubes are stable for up to 72 hrs in the refrigerator.

Patient Instructions: Patient is not required to fast prior to testing and the test is offered without regard to time of the day and/or time of last meal. Glucola (oral glucose load) will be administered to patient by phlebotomist and must be consumed within a 5 minute interval; sipping of water is permitted. After consuming the glucose load the patient will be directed not to smoke, chew gum, eat and consume caffeine-containing beverages and have minimal activity during the testing phase. Patient will be permitted to drink small sips of water and be allowed to leave the laboratory area during the testing phase. However the patient will be required to remain on clinic or hospital facility grounds. In addition the patient will need to return back to the laboratory for a blood collection in one hour post administration of glucola, a reminder slip with the appropriate time will be given to the patient by phlebotomist.
Note: The patient will be advised by the phlebotomist that if any adverse symptoms develop (i.e. nausea, headache, dizziness or vomiting) the patient should report immediately back to the laboratory. At that point it will be determined if testing will continue or if medical attention is needed. If specimen is collected between 75 and 90 minutes after dosing, add comment (Coded comment: GLUCOLA).The test should be cancelled if specimen collection is delayed beyond 90 minutes.