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Test Code GLU 2 PC Glucose 2 Hour PC or Gestational Glucose Screening-2 Hour

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       
General Hospital Laboratory 304-388-6244
Women and Children's Hospital Laboratory 304-388-2385
Teays Valley Hospital Laboratory 304-757-1770

Patient Preparation

  1. Give 50 grams of glucose beverage unless the physician order specifies a meal.
  2. Instruct the patient to have nothing to eat, drink or smoke except for sips of water until blood is drawn 2 hours later.
  3. Patient should be instructed to return to the lab a few minutes before the 2 hours is up.

Specimen Requirements

Plasma- Mint Green, Dark Green Lithium Heparin or Gray Sodium Fluoride 

Serum- SST gold top, red top

Allow SST or red top to completely clot

Spin and physically separate plasma/serum from contact with cells as soon as possible

4 mL of plasma/serum (minimum 2 mL)

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient
  • Hemolyzed 

Storage and Stability

Room temperature 15-25oC 8 hours
Refrigerated 2-8oC 3 days
Frozen -20oC Not specified

Reference Values

No established reference values.

The test result must be integrated into the clinical content for interpretation.

Critical Values: < 60mg/dL or > 500 mg/dL

Methodology

Photometric Hexokinase G-6-PDH

Days Test Set Up and Turnaround

Monday through Friday, Dayshift

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

82950