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Glucose Tolerance Test 2-hour


TEST DIRECTORY
Test Name
Glucose Tolerance Test 2-hour
Alternate Names
GTT 2H
Test Code
GTT2H
SPECIMEN REQUIREMENTS
Supplies for Submission
Grey Top Sodium fluoride - whole blood (3); alternately SST/Gold Top (3)
Specimen Collection
  1. Label Grey Top tubes with two identifiers. Acceptable identifiers include patient’s name, date of birth, social security number, requisition number, and medical record number.
    Label the 3 tubes as “F”, “1”, and “2”.
  2. Draw a fasting sample in tube F. Indicate collection time.
  3. Give the patient a 75 g-dose of glucola.
  4. Draw the 1-hr sample in tube 1, one hour after the patient finishes drinking the glucola. Indicate collection time.
  5. Draw the 2-hr sample in tube 2, two hours after the patient finishes drinking the glucola. Indicate collection time.
Storage Requirements
Refrigerated.
Specimens are stable if if stored at room temperature for 7 days or refrigerated for 7 days.
GENERAL AND TECHNICAL INFORMATION
Turn Around Time
1 day
Limitations
If the patient weighs less than 95 pounds, please call the laboratory for special dosing instructions.
CPT Code
82951