Glucose, CSF

Test Code

CFGLU

Alias/See Also

CSF, Glucose

CPT Codes
82945

Preferred Specimen

CSF TUBE (CFO)

Instructions

refer to https://jdos.nicholsinstitute.com/dos/cmclab/test/373145/?k=csf

Specimen Stability

CSF: Freshly drawn CSF specimens are recommended for CSF specimens.

Setup Schedule

24x7

Report Available

<1 day

Reference Range

35-70 mg/dL

Clinical Significance

The normal cerebrospinal fluid (CSF)-to-serum glucose ratio is about 0.6. CSF from the ventricles of the brain has a higher glucose level than CSF obtained from lumbar puncture (by about 6 to 18 mg/dL). Determination of CSF glucose helps distinguish bacterial from viral meningitis; the glucose value is often low (less than 40% to 45% of simultaneously analyzed, equilibrated serum glucose) in bacterial meningitis and tuberculous meningitis and is generally normal in viral meningitis (though viruses associated with meningoencephalitis, such as Herpes, can be associated with low CSF glucose). Carcinomatous meningitis (widespread infiltration of the meninges by tumor cells)and sarcoidosis of the meninges can also cause low CSF glucose values.

Performing Laboratory
CRMC Laboratory
CCMC Laboratory

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.