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HelpTest Code GLUF Fasting Glucose, LAB81
Performing Laboratory
St. Luke's Hospital Cedar Rapids
Specimen Requirements
Container/Tube:
Preferred: Green-top (lithium heparin) tube
Acceptable:Serum, K2‑EDTA, NaF/Na2EDTA, KF/Na2EDTA, NaF/K‑Oxalate and NaF/citrate/Na2‑EDTA are acceptable. Plasma or serum samples without preservative (NaF) should be separated from the cells or clot within half an hour of being drawn.
Specimen Volume: Minimum volume of 1.5 µL plus a dead volume
Stability: Separated specimens are stable for as long as 8 hours at 25°C and up to 72 hours at 2-8⁰C.
Reference Values
0-2 days: 55-65 mg/dL
>2 days: 70-99 mg/dL
Critical Values
|
Serum/Plasma |
Outpatient |
||
|
Critical low |
0 – 2 days |
45 mg/dL |
Always call |
|
|
3 days – 12 years |
59 mg/dL |
Always call |
|
|
>12 years |
59 mg/dL |
Call during business hours |
|
Critical high |
0 – 2 days |
200 mg/dL |
Always call |
|
|
>2 days |
>400 mg/dL |
Always call |
Day(s) Test Set Up
Monday through Sunday
Useful For
Glucose measurements are used in the diagnosis and treatment of carbohydrate metabolism disorders including diabetes mellitus, neonatal hypoglycemia, idiopathic hypoglycemia, and of pancreatic islet cell carcinoma.
Methodology
Hexokinase/Ultraviolet
Test Classification and CPT Coding
82947
Report Available
STAT within 1 hour of receipt
Routine within 2 hours of receipt