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Test Code LAB4103 GLUCOSE

Important Note

Plasma or serum samples without preservative (Sodium Floride Grey top tube)  should be separated from the cells or clot within half and hour of being drawn. When blood is drawn and permitted to clot and stand uncentrifuged at room temperature the average decrease in serum glucose is ~7% in 1 hour.

Specimen Type

Preferred Sample: Lithium Heparin Plasma (Mint Green Top, Dark Green)

Alternative Sample:   Serum Tube (SST, Gold, Corvac, Tiger, Red Top) Sodium Floride (Grey top tube)

Specimen Volume

1.0 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily and STAT

Sample Stability

Room Temperature: 2 Days

Refrigerated: 7 Days

Frozen: 3 Months

Method

Colorimetric

Reference Ranges

Glucose, mg/dL
0 up to 2 Days 40 - 90
2 Days up to 28 Days 60 - 105
28 Days and older 65 - 99

 

ADA Diagnostic Categories for nonpregnant adults:

Impaired fasting glucose 110-125 mg/dL A fasting glucose result of 126 mg/dL or greater indicates diabetes if the abnormality is confirmed on a subsequent day.

A random glucose result of GT 200 mg/dL indicates diabetes if the abnormality is confirmed on a subsequent day.

Test Components

Glucose mg/dL.

CPT Codes

82947