GLUCOSE TOLERANCE, 1 HR GESTATIONAL SCREEN

Message

This test does not require a baseline (fasting) sample. Draw specimen 1 hour after administering 50g oral gluocse (Glucola), or dose specified by physician.

Test Code

GLUPG (OE) 1HPG (LAB)

Alias/See Also

GTT
Post OB

CPT Codes
82950

Preferred Specimen

Gold Tube (SST)

Patient Preparation
Patient need not be fasting. Physician may specify the amount of oral glucose (Glucola) used. If amount not specified, provide patient with a 50g oral glucose drink (Glucola) then draw sample 1 hour after consumption.

Minimum Volume

1 mL

Other Acceptable Specimens

Light Green (Lithium Heparin w/Gel)

Instructions

Centrifuge ASAP and separate serum or plasma from red cells to minimize the loss of gluocse through glycolysis.

Transport Container

GOLD Tube

Transport Temperature

Room temperature

Specimen Stability

2-8°C up to 3 days
15-30°C up to 24 hours (plasma)
15-30°C up to 8 hours (serum)

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Collection time not labeled correctly on tube(s)
Hemolysis

Methodology
Hexokinase

Setup Schedule

DAILY, as received

Report Available

STAT: <60 minutes
Routine: <4 hours

Reference Range

Test: GLUC.TOLERANCE FASTING Male/Female All Ages: Normal Range: 65-99 mg/dL Test: GLUCOSE,1 HR GEST Male/Female All Ages: Normal Range: <130 mg/dL

Clinical Significance

Establish the diagnosis of diabetes mellitus in the pregnant patient. This test is the initial screen in the two-step screening approach recommended by the American College of Obstetrics and Gynocology (ACOG)

Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.