Glucose Tolerance, Fasting, 1 HR, 2 HR, 75 GM Load

Test Code: TD_2292

CPT Code(s): 82951

$24

Test Details

Alternative Name(s)

GTT

Test Includes

Glucose Tolerance, Fasting, 1 HR, 2 HR, 75 GM Load

Methodology

Roche COBAS enzymatic colorimetric HK gen 3 ID/MS traceable

Rejection Criteria

Gross hemolysis

Reference Range(s)

By Report

Specimen Requirements

Preferred Specimen

Sodium Fluoride Gray Top Tube

Minimum Volume

2 mL Whole Blood for each sample collected

Sample Stability

5 days room temperature
1 week refrigerated

Transport Temperature

Refrigerated

Collection Instructions

Note: patient name and time of collection must be visible on timed collection tubes for testing.

1. Patient should be directed to fast overnight or for at least 8 hours.
2. Collect fasting sample: 2 mL sodium fluoride whole blood. Clearly label tube with time of collection and apply fluorescent timed collection label. Refrigerate.
3. Administer specified amount of glucose (glucola or other equivalent).
4. Collect 2 mL sodium fluoride whole blood at timed intervals of 1 hour and 2 hours after administration of glucose source. Clearly label tube with time of collection and apply fluorescent timed collection label. Refrigerate.
5. Submit fasting, 1 hour and 2 hours specimens rubber banded together. Refrigerate.

Note: For Pediatric patients, glucose dose is 1.75 grams glucose per kg body weight (0.8 grams glucose per pound) up to a maximum dose of 75 grams.

Alternative Specimen

N/A