CELL COUNT, BODY FLUID

Test Includes: White blood cell count, red blood cell count, white blood cell differential (includes all nucleated cells observed on concentrated smear)

Applies To: CSF hemorrhage, meningitis, neoplastic infiltration, serous cavity infection, trauma, synovial inflammation/infection

Lab: Hematopathology

Request Form: Hematology A

Collection: Collected by physician with prompt delivery vital for quality results.

Storage Instructions: For best results, deliver to lab within 1 hour.

Cause For Rejection: QNS, old specimen, identification error

Availability: Samples are accepted 24 hours per day at Sample Management, 5.136 McCullough

Turnaround Time: STAT: 1 hour; Routine: 4 hours

Special Instructions: Synovial, serous or other bloody fluids should be collected in EDTA tube to prevent clotting. Specify site explicitly.

Specimen: CSF, ventricular, pleural, pericardial, synovial, miscellaneous body fluids (call laboratory)

Volume: 2 ml

Minimum Volume: 1 mL

Container: Sterile tube; EDTA (Lavender-top tube) if viscous or bloody

Reference Ranges: Multiple ranges (see patient chart)

Critical Value: Joint Fluid WBC > 50,000/mm³

Test Method: Manual Hemocytometry;and Manual Microscopy for hypcellular specimens. For highly cellular samples, the WBC is measured using flow cytometry. The RBC is measured using electronic resistence detection enhanced by hydrodynamic focusing.

Interfering Substances: Clotted specimen, tissue fragments

Revised 10/10/07 by L. Dornak, MT (ASCP)

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