Clinics and Departments

Laboratory Services

Lab Dept:

Hematology

Test Name:

CBC, PLATELET WITH DIFFERENTIAL

General Information

Lab Order Codes:

CBC

Synonyms:

Complete Blood Count (CBC) with Differential; Complete Blood Count (CBC); CBC, Hemogram with Differential; Complete Blood Count (CBC), Platelet with Differential (PLTC)

CPT Codes:

85023 – Hemogram and platelet count, automated, and manual differential WBC count (CBC)
85025 – Hemogram and platelet count, automated, and automated complete differential WBC count (CBC)

Test Includes:

WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, Platelet Count, MPV, WBC Differential

Logistics

Test Indications:

Useful for the evaluation of anemia, leukemia, reaction to inflammation and infections, peripheral blood cellular characteristics, state of hydration and dehydration, polycythemia, hemolytic disease of the newborn, and ABO incompatibilities.

Lab Testing Sections:

Hematology

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

4 hours

Special Instructions:

Do Not collect specimen while lipids are being infused or for 4 hours post-infusion.

Optimally, specimen should arrive in the lab within 4 hours of collection. Specimens can be stored at room temperature up to 24 hours.

Specimen

Specimen Type:

Whole blood

Container:

Lavender top tube (EDTA), Lavender MicrotainerŽ

Draw Volume:

2 mL in a short draw Lavender top tube

0.5 mL in Lavender MicrotainerŽ

Processed Volume:

Minimum: 0.5 mL blood

Collection:

Routine venipuncture or capillary draw

Special Processing:

Lab Staff: Do Not centrifuge

Patient Preparation:

None

Sample Rejection:

Improper tube; clotted sample; underfilled tube; overfilled tube; mislableled or unlabeled specimen

Interpretive

Reference Range:

Age and Sex Dependent; Refer to CBC Reference Value

Critical Values:

Test:

Value

Hem/Onc Clinics

Hematocrit:

<21% or >65%

None

Hemoglobin:

<7.0 gm/dL

<5.0 gm/dL

Platelets:

<50,000 or >1,000,000

<5,000

WBC:

Newborn: <5,000 or >35,000

None

Others: <2,000 or >25,000

None

Differential/
Morphology:

Presence of Blasts; however, if the presence of Blasts has been reported within the last 30 days no notification is necessary.

Presence of Blasts; however, if the presence of Blasts has been reported within the last 30 days no notification is necessary.

Limitations:

Lipemia, elevated WBC and cold agglutinins will prolong the turn around time of an occasional specimen.

Methodology:

Automated Cell Counter

Contraindications:

Differential will not be done on samples with a WBC <0.5 x 103/uL

References:

Nathan, DG, et al (1987) Hematology of Infancy and Childhood, WB Saunders pp.1680-1688

Normal Reference Range Study (1994) Children's Hospitals and Clinics, Minneapolis and St Paul, MN, Hematology Laboratory

Updates:

3/21/2011: Critical value statement for Blasts previously listed as “Presence of Blasts”.



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