| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Glucose, Fasting
Test CodeLAB81
Alias/See Also
Glucose
CPT Codes
82947
Includes
Glucose
Preferred Specimen
Light green top tube (lithium heparin plasma)
Minimum Volume
Whole blood: 600 uL (one full light-green-top microtainer or two full red-top microtainers). Serum/plasma: 300 uL plasma.
Other Acceptable Specimens
Gold top (serum separator tube) or Red Top
Instructions
Patient must be fasting for 8 hours.
LAB: Centrifuge specimens within 30 minutes of collection and analyze promptly. Serum acceptable.
LAB: Centrifuge specimens within 30 minutes of collection and analyze promptly. Serum acceptable.
Specimen Stability
Ambient: up to 24 hours.
Refrigerated: 7 days.
Frozen: 1 year
Refrigerated: 7 days.
Frozen: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed, contaminated, not enough volume
Setup Schedule
Everyday
Report Available
Same day
Limitations
In fresh specimens, catalase released from the lysis of red blood cells causes a negative bias in glucose results. The degree of bias is proportional to the degree of hemolysis. A negative bias of up to 10% may be observed with a level of hemolysis associated with a hemoglobin concentration of 250 mg/dL.
Reference Range
<126 mg/dL
