Name: Differential without WBC
Test Name: Differential without WBC
Health Link Test Code: DIFF
LIS Test Code: D1
CPT Code(s): 85004
WBC Differential, RBC morphology and platelet evaluation.
Use of manual microscopy for WBC differential is determined by laboratory personnel during testing.
Included In: CBC with Differential, WBC and Differential
Methodology: Flow Cytometry, Impedance, and where applicable, Manual Microscopy
Days Performed: Daily, 24 hours- all ER specimens performed stat and General Peds/Adolescent Med (GPAM) specimens performed stat upon request (please mark on request form).
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Collection Container: K3EDTA-Lavender top
Also Acceptable: K2EDTA-Lavender top, Pink top tube
Collection Volume: 4 mL
Pediatric Collection Volume: 1 mL
Sample Analyzed: Whole Blood
Testing Volume: 1 mL
Pediatric Testing Volume: 0.25 mL in microtainer
Transport specimen to laboratory at ambient temperature.
Clotted specimens are not acceptable. Tubes with <25% of fill volume.
Note: Reference Intervals for relative percent (%) can be found on the patient report.
|Age 18 years and up:|
|Pediatric Reference Interval*|
|0-29 days||< 3500||< 2000||< 400|
|< 1000||< 700||< 100|
|2-9 years||< 1000||< 700||< 100|
|10-17 years||< 1000||< 700||< 100|
*from Children's Hospital of Buffalo, 1995/Verified by Milwaukee Children's Hospital
|3 days - 3 months||<700|
|4 months - 10 years||<30|
Interpretation Type: Reference Interval
Critical Calls: yes
Differential results may be delayed if a hematopathologist review is warranted. A professional fee may be associated with this test.