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Laboratory Test Detail

Last Updated: June 5, 2023 @ 9:13 am

2093

Gestational Diabetes Screen [50 gram - ACOG]

Specimen:Collect:
  • One Gray Top (1HR)

Also Acceptable:
  • One SST (1HR)
Submit:
  • One 4 mL (Min:1 mL) Whole blood in Gray Top. Submit Refrigerated.

Also Acceptable:
  • One 1 mL (Min:0.5 mL) Serum in SST. Submit Refrigerated.
  • One 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Give 50 gm of glucola and wait 1 hour then draw specimen.
    Patient does not need to be fasting. However, once glucola is administered they should not have anything else to eat or drink (except water) until the 1 hour sample is drawn.

    Other alternative samples:
    Green Top (Li Hep), Lavender EDTA, Pink EDTA, Red Top.
    If using alternative serum or plasma separate from cells ASAP.
    Stability for serum or plasma: Ambient 8 hrs, RF 3 days, FZ 1 month.
Rejection Criteria:
  • Frozen whole blood
  • Hemolyzed specimens
  • Microbially Contaminated
Stability:Ambient: 1 Day(s); Refrigerated: 3 Day(s); Frozen: Unacceptable; Incubated: Unacceptable
Methodology:
  • Colorimetric
  • Kinetic
Performed:Mon-Fri
Reported:1-3 Day(s)
CPT Codes:
  • 82950
Interpretive Data:General Reference Range : <135 mg/dL
One-hour glucose values >140 mg/dL identify approximately 79% of women with Gestational Diabetes Mellitus (GDM), while one-hour glucose values >130 mg/dL identify approximately 93% of women with GDM. Recommend patients above the cutoff undergo a 3-hr glucose tolerance test for confirmation.

Note: Reference range change as of 2/18/2020
Components:
  • 2093 - GEST DM SCRN
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