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Glucose, Fasting
MessagePerforming Lab: Hudson, Lakeview, Regions, Westfields
Test Code
0115a
Alias/See Also
Sunquest: GLUF
CPT Codes
82947
Preferred Specimen
0.2 mL Lithium Heparin Plasma (light green-top) tube
Minimum Volume
0.1 mL
Other Acceptable Specimens
Serum (gold-top, red-top, red/gray-top), Lithium Heparin (light green-top) on ICE
Instructions
Ordering: HP & Sartell - order GLR
Collection:
Patient should be fasting prior to collection. Fasting is defined as “Nothing consumed in the past 12 hours except water"
Processing: Centrifuge specimens and removed from cellular material within 30 minutes to avoid metabolism of glucose by cells.
Collection:
Patient should be fasting prior to collection. Fasting is defined as “Nothing consumed in the past 12 hours except water"
Processing: Centrifuge specimens and removed from cellular material within 30 minutes to avoid metabolism of glucose by cells.
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 24 hours
Refrigerated: 7 days
Frozen: 1 year
Refrigerated: 7 days
Frozen: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Samples not removed from cellular material within 30 minutes, hemolysis
Methodology
Colorimetric
Setup Schedule
Daily
Report Available
Same day.
Reference Range
0-3 Days: 40 - 100 mg/dL
>3 Days: 70 - 140 mg/dL
Critical Low: <= 50 mg/dL
Critical High: >= 450mg/dL
>3 Days: 70 - 140 mg/dL
Critical Low: <= 50 mg/dL
Critical High: >= 450mg/dL
Clinical Significance
Glucose is a primary cellular energy source. Fasting plasma glucose concentrations and tolerance to a dose of glucose are used to establish the diagnosis of diabetes mellitus and disorders of carbohydrate metabolism. Glucose measurements are used to monitor therapy in diabetics and in patients with dehydration, coma, hypoglycemia, insulinoma, acidosis, and ketoacidosis
