Glucose, Gestational Screen (50g)

CPT Code(s):

  • 82950

Preferred Specimen:

1 mL plasma collected in a fluoride/oxalate (gray-top) tube

Minimum Volume:

0.5 mL

Alternate Specimen:

Plasma from fluoride/oxalate (gray-top) tube in a plastic screw-cap vial ¥ Serum (separated from cells immediately) in a plastic screw-cap vial ¥ Spun SST ¥ Plasma from lithium heparin (green-top) tube in a plastic screw-cap vial ¥ Plasma from sodium heparin (green-top) tube in a plastic screw-cap vial

Patient Preparation:

Fasting is not required. The patient is given a 50 gram dose of glucose and a single blood specimen is obtained one hour later. The test should be performed between weeks 24 and 28 of gestation.

Transport Container:

Fluoride/oxalate (gray-top) tube

Transport Temperature Name:

Room temperature

Specimen Stability Components:

  • Room Temperature: Gray-top whole blood 24 hours Plasma 7 days (separated from cells)
  • Refrigerated: Plasma 7 days (separated from cells)

Testing Schedule:

Daily

Methodology:

HEXOKINASE

Reference Range:

<130.0 mg/dL

Reject Criteria:

Anticoagulants other than fluoride/oxalate. Hemolysis

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Genesis