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Test Code GLUCHA Glucose Tolerance, 1 Hour OB Screen

Additional Codes

EPIC:  LAB5060

Methodology

Oxygen Rate Method

Useful For

Also know as the O'Sullivan Test, the one hour glucose screen is used to detect gestational diabetes.  Screening is typically performed between weeks 24-28 of gestation but patients with risk factors may benefit from earlier screening.

Performing Laboratory

St. Joseph Hospital

Specimen Requirements

Patients do not need to fast for this procedure.

Plasma:  Draw blood in a light green top (PST) or grey-top (potassium oxalate/sodium fluoride) tube 1 hour after a standard 50 gram oral carbohydrate challenge.  Centrifuge to separate plasma from cells and send 0.5 mL of plasma refrigerated.

Reference Values

Patients with 1 hour glucose values greater than 140 mg/dl should be evaluated with a standard 2 or 3-hour OGTT. 

Day(s) Test Set Up

Monday through Saturday

Test Classification and CPT Coding

82950