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Cell Count and Differential, CSF
Test Code398
CPT Codes
89051
Includes
Appearance, Color, RBC Count, Total Nucleated Cell, Neutrophils %, Lymphocytes %, Monocyte/Macrophage %, and Eosinophils %
Preferred Specimen
1 mL CSF collected in a sterile, plastic, leak-proof CSF tube
Minimum Volume
0.5 mL
Instructions
Room temperature and Refrigerated: STAT testing recommended due to cellular degeneration upon standing. Viability of specimen will be determined when it is received in the laboratory.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: See instructions
Refrigerated: See instructions
Frozen: Unacceptable
Refrigerated: See instructions
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Clotted
Methodology
Microscopy Visual Examination
Setup Schedule
Monday-Saturday Morning, Evening, Night
Sunday Morning
Report available: Next Day
Sunday Morning
Report available: Next Day
Limitations
Traumatic spinal tap will affect results. Early stage of meningitis may not affect cell count or differential.
Reference Range
See Laboratory Report
Clinical Significance
CSF examination is helpful in the detection and diagnosis of central nervous system disease such as acute bacterial meningitis, encephalomyelitis, polyneuritis, brain tumor, cerebral thrombosis and hemorrhage
