Not orderable

75g ADA Gestational Glucose Tolerance Test (Fasting, 1, 2 hours)

Synonyms

  • GESTATIONAL 2 HR GLUCOSE TOLERANCE TEST (ADA)
  • GTT2G
  • LAB10856

Cerner Name

Gestational 2 Hr Glucose Tolerance Test (ADA)

Clinical Info

Specimen Sources

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

Specimen Types

Blood

Specimen Volume

1 mL of potassium oxalate/sodium fluoride plasma

Container

Gray Top Tube

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 75 g dose of Glucola (patient must drink entire beverage within 5 minutes).
5. Draw blood specimens at 1 hour and 2 hours post Glucola ingestion.
 Note:  Label specimens appropriately (fasting, 1 hour, and 2 hour).

Transport Instructions

Refrigerate

Specimen Stability

Methodology

Enzymatic

Days Performed

Monday through Sunday

Performing Laboratories

Northwell Health Laboratories

CPT

82951

PDM

145300602

Results
Component Name Base Name Common Name External Name
GEST. GLUCOSE FASTING (ADA) GLUGEST GLUCOSE FASTING GEST Fasting Gestational Glucose (75g ADA)
GEST. GLUCOSE 1 HR (ADA) GLUGEST GLUCOSE 1 HOUR GEST 1 Hour Gestational Glucose (75g ADA)
GEST. GLUCOSE 2 HR (ADA) GLUGEST GLUCOSE 2 HOURS GEST 2 Hour Gestational Glucose (75g ADA)

Result Interpretation

ADA diagnostic criteria for gestational diabetes mellitus following 75-g glucose load test:


Fasting: 70 - 91 mg/dL
1 Hr :  70 - 179 mg/dL
2 Hr:   70 - 152 mg/dL

 

Diabetes Care 2023;46(Suppl. 1):S19–S40 https://doi.org/10.2337/dc23-S002 

Forms
Endocrine LAB10856 build edit