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Test Code Glu Fasting Glucose Fasting for GTT

Aliases

Fasting Glucose Level

Patient Preparation

Fasting

Collection Method

Venous collection

Minimum Volume

  • Adults: 0.8ml
  • Pediatric: 0.5mL

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)
  • Purple Top(K2 EDTA)
  • Grey Top(Sodium Fluoride/Potassium Oxalate)

Reference or Target Ranges

0 minutes – 30 days 40 – 99 mg/dL
30 days – 150 years 70 – 99 mg/dL

Reportable Units

mg/dL

Critical Value

0 minutes – 30 days <40 or >300 mg/dL
30 days – 150 years <40 or >400 mg/dL

Reasons for Rejection



<!-- Rejection-->
Hemolysis Threshold
 1000 mg/dL
Icterus Threshold
 60 mg/dL
Lipemia Threshold
 1000 mg/dL
Other
 QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability



<!-- Stability -->
Ambient
 8 hours
Refrigerated (4°C to 8°C)
 72 hours
Frozen(-40°C to 0°C)
 N/A

Performance Information



<!-- 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
 UV enzymatic method

CPT Codes

82947