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Test Code CELL CNT Body Fluid, Cell Count

Clinical System Name

Body Fluid Cell Count


Body Fluid, Cell Count

Sample Requirements

Specimen:  Body Fluid

Container(s): Sterile Screw-Capped Container/Tube or Syringe, Lavender/EDTA Tube, Dark Green/Sodium Heparin tube

Preferred Vol: 1.0-2.0 mL

Minimum Vol: 0.50 mL body fluid


Note: Note type of body fluid on requisition and container. Send to the lab immediately for accurate results, cells start to lyse upon standing.

For bloody fluids or synovial fluid CELL COUNTS, collect in a lavender EDTA tube to prevent clotting. Collect synovial fluid for crystal exams in dark green Sodium Heparin tube.

Lavender/EDTA and Lithium Heparin tubes may produce crystalline structures resembling monosodium urate in synovial fluid and are therefore not recommended for crystal analysis.


Processing Instructions

Reject due to: Age of Specimen, Clotted Solid

Spin: N

Aliquot: N

Temp: RT

Storage location: Deliver to Core lab Hematology bench ASAP. 


Off-site collection: None specified



Specimen Type Temperature Time
Body Fluid RT

 1 hr

Body Fluid 2-8oC

 1 hr

Body Fluid -20oC or -70oC




STAT Performed TAT
Y 24/7 1 H


Performing Laboratory

Seattle Children's Laboratory    


Department:  Core Hematology

Phone Number: 206-987-2617

Reference Range

Reference ranges are not available for BF.


Method:  Manually counted via plating on an iNCYTO hemacytometer

Analytical Volume:  0.05mL

CPT Codes