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Test Code WBC WHITE BLOOD COUNT

Important Note

Specimen must arrive within 24 hours of draw.

WBC count is included in CBCDIFF “CBC (Complete Blood Count) with Differential, Blood;” DIFF “Differential, Manual, Blood;” and CBC NO DIF “CBC (Complete Blood Count), Blood.”

Methodology

Sysmex® XN Methodologies

 

This test may be performed after treatment involving chemotherapeutic drugs or in checking for idiosyncratic reactions to medications.

Specimen Requirements

Specimen must arrive within 24 hours of draw.
 

Container/Tube: Lavender-top (EDTA) tube(s) with HemogardTM lid or lavender MICROTAINER®

 

NOTE: 6 & 7 mL (EDTA) tubes are not compatible with our automated Hematology system.

 

Specimen Volume: 3 mL (minimum volume: 1 mL/pediatric: 0.5 mL) of whole blood

Collection Instructions:

Invert tube(s) several times to mix blood. Do not centrifuge. Forward promptly in original tube(s).

Specimen Rejection

  1. Do Not Centrifuge
  2. Clotted or Hemolyzed
  3. Frozen Samples

Specimen Retention Time

48 hours

Day(s) Test Set Up

Monday through Sunday

Maximum Laboratory Time

24 hours

Specimen Stability

 

Specimen Type Temperature Time
Blood Ambient < 24 hours
  Refrigerate < 48 hours
     

Reference Values

≤5 days:            9.4-34.0 k/mm3

6 days-3 years: 6.0-17.5 k/mm3

4-11 years:       4.5-13.5 k/mm3

≥12 years:        4.8-10.8 k/mm3


Critical value (automatic call-back): <1.0 k/mm3

Performing Laboratory

Logan Health Medical Center Laboratory

Test Classification and CPT Coding

85048