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Test Code 1 Hr Glu Glucose Screen, Pregnancy (Care Set)

Aliases

1 hour Glucose Tolerance Test, 50 g

Useful For

Screen for gestational diabetes

Patient Preparation

Fasting is not required

Special Collection Instructions

  1. Give 50 g glucola.
  2. Draw venous specimen at 1 hour post consumption.

Collection Method

Venous collection

Minimum Volume

0.4 mL

Container

Grey Top / Sodium Fluoride Potassium Oxalate

Preferred Specimen

Grey (Sodium Flouride/Potassium Oxalate)

Acceptable Specimens

Serum:

  • Gold Top SST
  • Red Top

Plasma:

  • Light Geen Top (lithium heparin)

 

Reference or Target Ranges

<135 mg/dL

Reportable Units

mg/dL

Critical Value

<40 mg/dL or >400 mg/dL

Reasons for Rejection

 

Hemolysis Threshold 1000 mg/dL
Icterus Threshold 60 mg/dL
Lipemia Threshold 1000 mL
Other QNS, contaminated, improperly labeled, improper specimen type

Specimen Stability

 

Ambient 8 hours (if collected in SodiumFlouride/Potassium Oxalate tube)
Refrigerated (4°C to 8°C) 3 days
Frozen(-40°C to 0°C) Not listed

Performance Information

 

Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench UH Chemistry, WCH Chemistry
Methodology/Method Description Roche Cobas – Glucose Hexokinase

Special Handling

Centrifuge within 2 hours of collection if collected in PST/SST/Serum tube

Additional Information/Important Notes

If result is >130, follow-up with Glucose Tolerance Test, Gestational, Diagnostic

CPT Codes

82947