CSF Glucose

Test Code

LAB185

Alias/See Also

CFGLU; Glucose, CSF

CPT Codes
82945

Preferred Specimen

Collect CSF in sterile container. Centrifuge to remove particulate matter within 1 hour of collection.

Instructions

2mL Cerebrospinal fluid; Minimum volume 0.5 mL in a Screw-cap container.

Transport Temperature

Stable 3 days refrigerated.

Specimen Stability

Refrigerate; Stable 3 days refrigerated.
Can be frozen for 7-10 days for repeat determination.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Insufficient quantity; failure to follow stability requirements

Methodology
Colorimetric:The oxidation of sample glucose is catalyzed by glucose oxidase to form hydrogen peroxide and gluconate.

Reference Range

40-70 mg/dL

Clinical Significance

The most important reason for measuring CSF glucose is in the diagnosis of bacterial meningitis. A low CSF glucose (<40 mg/dL) is found in about 50% to 60% of patients with bacterial meningitis.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.