GLUCOSE, OB TOLERANCE, 3 HOUR

Mnemonic

PNGTT

Synonym

3 Hour OB Oral Glucose Tolerance Test -OGTT - GTT

Includes

Fasting Glucose and 1, 2, 3, hour glucose post 100 gram load glucola

Specimen Collection Requirements

Collect

Preferred: Plasma, one 4.0 mL gray (sodium fluoride/potassium oxalate) top tube Also acceptable: Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube.

Handling

The gold and green top tubes must be delivered to the lab immediately. Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferably, separate serum or plasma from cells within 1 hour of collection.

Preferred Volume

0.5 mL per specimen

Minimum Volume

0.3 mL per specimen

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

Specimens collected using lithium heparin tubes (PST) are stable up to 1.5 days refrigerated (2-8°C) on the primary spun gel tube AFTER SEPARATION FROM CELLS: Ambient (15-25°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below –20°C): 1 month

Testing Information

Performed

7 days/week

Method

Colorimetry

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Interpretation provided.

CPT Codes

82951, 82952

Last Updated: Thursday, January 5, 2017 03:42:13 AM