100g Gestational Glucose Tolerance Test (Fasting, 1, 2, 3 hours)

Synonyms

• 3 HR GLUCOSE TOLERANCE (GEST)
• GTT3G
• LAB10451

Cerner Name

3 Hr Glucose Tolerance (Gest)

Clinical Info

Specimen Sources

Blood, Arterial Blood, Capillary Blood, Central Line Blood, Venous

Specimen Types

Blood

Specimen Volume

1 mL of potassiumoxalate/sodium fluoride
plasma 

Container

Grey-top (potassiumoxalate/sodium fluoride) tubes.
Note:  This test requires 4 separate tubes collected at fasting, 1 hour, 2 hours, and 3 hours post glucose load.

Collection Instructions

1. Patient should be instructed to fast for at least eight hours prior to collection of specimens.
2. Patient should be instructed to refrain from smoking and drinking coffee just before and during test.
3. Draw blood specimen for a fasting glucose.
4. After drawing fasting specimen, give the patient a 100 g dose of Glucola (patient must drink entire beverage within 5 minutes).
5. Draw blood specimens at 1 hour, 2 hours and 3 hours post Glucola ingestion.
Note:  Label specimens appropriately (fasting, 1 hour, 2 hour, and 3 hour).

Transport Instructions

Refrigerate

Specimen Stability

Methodology

Enzymatic

Days Performed

Monday through Sunday

Performing Laboratories

• Core Lab Laboratory
• Glen Cove Hospital Laboratory
• LIJ Hospital Laboratory
• Northwell Health-CFAM
• SIUH Pouch Terminal Laboratory

CPT

82951
;

PDM

5300462

Results

Result Interpretation

Forms