Glucose Tolerance Test, 1 Hr Gestational Screen

CERNER / EPIC MNEMONIC: GTT-1 HR
POE DESCRIPTION: GLUCOSE TOLERANCE 1 HR; GTT 1 HOUR; GTT-1HR
CPT CODE: 82950
DAYS PERFORMED: Specimen accepted daily, 24 hours
TURNAROUND TIME: 8 hours
SPECIAL INSTRUCTIONS:

See Patient Instructions for Glucose Tolerance Test. The patient (at 24-28 weeks of gestation) is given orally a 50 gram solution of glucose. One hour later, the patient's blood is drawn for a glucose assay.

CONTAINER TYPE: Gray top (sodium fluoride) tube
SPECIMEN REQUIREMENTS: Blood (plasma)
MINIMUM VOLUME: 4 mL blood (2 mL plasma)
REFERENCE RANGE: Interpretive information (1 hour after 50 g glucose challenge at 24-28 weeks of gestation): >140 mg/dL Potentially indicative of gestational diabetes mellitus. Confirmation requires 3-hour glucose tolerance test.

Reference: Diabetes Care, 3 0(Supp. 1), S42-S47 (2007).

CRITICAL VALUES: <40, >500
TEST SYNONYM(S):Screening Test for Gestational Diabetes Mellitus