Clinics and Departments

Laboratory Services

Lab Dept:

Other Fluids

Test Name:

CSF COUNT & DIFFERENTIAL

General Information

Lab Order Codes:

CSFC

Synonyms:

Spinal Fluid Count; CSF Count; CSF Cell Count

CPT Codes:

89050 - Cell Count, miscellaneous body fluids
89051 - Cell Count, with differential

Test Includes:

Color, clarity, RBC, WBC and Differential if WBC >5 cells/mm

Logistics

Test Indications:

Evaluate spinal fluid for the presence of RBC’s and WBC’s that may be indicative of hemorrhage, meningitis, malignant neoplasms, leukemia or abcess.

Lab Testing Sections:

Hematology

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 hour

Special Instructions:

Specimen must arrive within 1 hour of collection. Indicate source of specimen (shunt or lumbar puncture). Do Not send to lab through the pneumatic tube system.

Specimen

Specimen Type:

CSF

Container:

Screw capped, sterile vial OR plastic syringe, capped

Draw Volume:

1 mL CSF

Processed Volume:

Minimum: 0.5 mL CSF

Collection:

Routine spinal fluid collection

Special Processing:

N/A

Patient Preparation:

Aseptic preparation for aspiration

Sample Rejection:

Clotted sample; slide will be processed to report most common WBC type; mislabeled or unlabeled specimen

Interpretive

Reference Range:

Appearance:

Clear and colorless

Cell Count:

RBC

0/uL

WBC (monuclear cells)

0 – 10/uL

Differential:

Cell type

Neonate (%)

>1 Month (%)

Lymphocyte

20 18

62 34

Macrophage/Mono-cyte

77 22

36 20

Neutrophil

3 5

2 5

Eosinophil

Rare

Rare

Critical Values:

N/A

Limitations:

N/A

Methodology:

Manual counts/differential

References:

Kjelsberg C et al (1993) Body Fluids, American Society of Clinical Pathologists Press

Update:

2/14/2005: Critical value for CSF WBC’s removed. Previously listed as >10/uL.



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