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Glucose Tolerance Test (GTT) - 2 Hour (Oral WHO Protocol)

Important Note

Male or non-pregnant female
Draw fasting glucose specimen & finger stick glucose
Give 75 gram glucola
Draw 2 hour Glucose specimen

Icon & Photos

Grey Potassium Oxalate

Specimen Requirements

Preferred:
Container/Tube: Grey Potassium Oxalate
Minimum Volume: 1.0 mL
Collection Instructions:
Also Acceptable:
Container/Tube: Mint Green Top (Lithium Heparin Gel)

Specimen Stability

Ambient: 8 hours
Refrigerate: 48 hours
Frozen: aliquot for longer storage

Reference Range

Fasting Glucose: 70 – 99 mg/dL
2 Hour Glucose: 70 – 139 mg/dL

Methodology

O2 Depletion

CPT

82947
82950