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O'Sullivan 1 Hour Glucose (Obstetric Screen)

Tube Type

Mint Green Plasma Separator Tube


Test ID LAB5364
EPIC Order
CPT Code(s) 82950
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine: 30, STAT: 888
Specimen Routine: 3 mL blood/Li Heparin plasma separator tube/Mint Green top. Also acceptable serum (Gold SST / Red Top Tube)
micro: 200 µL blood/mint green top bullet/gold top/red top
Availability 24 hr/day
Turnaround Time STAT 1 hr; Routine 2 hrs
Reference Range Normal: <135 mg/dL; see Comments for additional information
Critical: <40 mg/dL or >400 mg/dL
This test does not include a fasting glucose. The normal range is based on 50 gm glucose load in non-fasting state at 24-28 weeks gestation.
For results >135 mg/dL, please consult the most recent OB-GYN recommendations.
Source: 1. ACOG Practice Bulletin #137. Obstet Gynecol2013: 122:406-16.
           2. VanDorsten JP et. al. Diagnosing gestational diabetes. NIH Consensus Development Conference Statement 2013;29(1):1-30.

Reviewed by Christopher Parker on July 13, 2021

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514