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Test Code LAB210 Cell Count, Body Fluid with Differential

Specimen Requirement

1.0 mL fluid in an EDTA tube

 

Specimen Minimum Volume

0.5 mL of fluid in an EDTA tube

Specimen Stability

Cell Count:

  • Room temperature 4 hours
  • Refrigerated (4° C) 24 hours

Manual Differential:

  • If cytospin slide is not prepared at collection, slide can be
    prepared only up to 4 hours from collection time of fluid.

Testing Schedule

Daily

Reference Range

Synovial Fluid

  • WBC  < 200 / ul
  • PMN  < 25 %

 

Peritoneal Fluid

  • Appearance:  clear / yellow
  • WBC  < 500 / ul
  • PMN  < 25 %

 

Pericardial/Pleural Fluid

  • Appearance:  clear / yellow
  • WBC  < 1,000 / ul

 

CSF (greater than one year)

  • Appearance:  clear / colorless
  • RBC    0 - 10 / ul
  • WBC   0 - 5 / ul

 

CSF (under one year)

  • Appearance:  clear / colorless
  • RBC   No RBC's present
  • WBC  0 - 20 / ul

Testing Department

Hematology/Coagulation

Method

Hemacytometer or, if applicable, automated hematology analyzer

CPT Code

89051