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Test Code GLU Glucose, LAB2474



Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Green-top (lithium heparin) tube

Acceptable: Gold-top serum gel tube or plain red-top tube

Specimen Volume: 0.1 mL of plasma or serum

Stability: Separated specimens are stable for as long as 8 hours at 25°C and up to 72 hours at 4°C.

Note:  Venipuncture should occur prior to sulfasalazine and/or sulfapyridine administration due to the potential for falsely depressed results.

Reference Values

0-2 days:  55-65 mg/dL

>2 days:  70-99 mg/dL

Critical Lows

0-2 days:  <46 mg/dL

>2 days:  <70 mg/dL

Critical Highs

0-7 days: >200 mg/dL

>1 week: >400 mg/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


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.