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Test Code LAB294 Complete Blood Count (CBC) without Differential, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Sysmex XN (Electrical Impedance)

Includes WBC, RBC, hemoglobin, hematocrit, RBC indices, RDW-CV, RDW-SD, platelet, MPV, nRBC, and nRBC Absolute.

 

If an abnormal value or flag is triggered on the initial patient specimen, a manual smear will always be reviewed. Any subsequent specimen within 72 hours will be verified by the “Consistent Rule” unless there is a change in the values and flags in which case a new smear review will be conducted. 

Literature References:

Resource Manual:  Sysmex XN-Series Automated Hematology Systems, Document Number:  1002-LSS, Rev. 2, January 2013

Specimen Requirements

Specimen Type: Whole blood

Container/Tube: Lavender top (EDTA)

Specimen Volume: Full tube

Collection Instructions: Immediately invert several times to mix blood.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 1 hour after receipt in laboratory 
Routine: 2-4 hours after receipt in laboratory

Test Classification and CPT Coding

85027

See additional CPT 85055 Immature Platelet Fraction (IPF) if PLT-F <50 K/cumm

Reference Values

WBC

3.8-9.9 K/cumm
 

Physician alert values:

Inpatients: <1.0 K/cumm or >50.0 K/cumm.  Inpatient alert values are called the first time and if consistent, resulted as “Consistent with previous” for 30 days.

Outpatients: <1.0 K/cumm or >50.0 K/cumm.  Outpatient alerts are called each time.


RBC
Males
4.3-5.8 M/cumm
Females
3.9-5.2 M/cumm


HEMOGLOBIN
Males
13.0-17.5 g/dL
Females
11.9-15.5 g/dL
 

 Physician alert values:

Inpatients:  < 6.5 g/dL and >/= 20.0 g/dL.  Inpatient alert values are called the first time and if consistent, resulted as “Consistent with previous” for 72 hours.

Outpatients: <6.5 g/dL and >/= 20.0 g/dL.  Outpatient alerts are called each time.

 

HEMATOCRIT
Males
38.9%-50.3%
Females
35.6%-45.5%

 

MCV

81.3-96.4 fl

 

MCH

27.1-33.3 pg

 

MCHC

32.3-35.7 g/dL

 

RDW-CV

11.1%-14.9%

 

RDW-SD

35.7-48.1 fL

 

PLATELETS
150-400 K/cumm
 

Physician alert values:

Bone Marrow Transplant Inpatients: < 10 K/cumm.  BMT alert platelet counts are called each time.

Non-BMT Inpatients: <20 K/cumm and >1,000 K/cumm. 

Inpatient alert values < 20 K/cumm are called each time. 

Inpatient platelet counts > 1,000 K/cumm are called the first time and if consistent, resulted as “Consistent with previous” for 30 days.

Outpatients: <50 K/cumm and >1,000 K/cumm. Outpatient alerts are called each time.

 

MPV

9.1-12.3 fl

 

IMMATURE PLATELET FRACTION %

1.6-10.1%

 

nRBC Absolute

0.00-0.01

 

Literature References:

1. Henry JB. Clinical diagnosis and management. WB Saunders Co.,1979.

2. McKenzie S. Clinical laboratory hematology. Pearson Prentice Hall, 2004:5.

3. Medicine Net. Complete blood count, medicinenet.com/complete 1996-2006.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only
Alternate Tube:

If pink-top (EDTA) tube is available, sample must be front loaded and approved for use by supervisor.

Analyte Stability:

Refrigerated: up to 24 hours

Laboratory Processing Instructions:
Test performed in BJH Core Lab

LOINC Code Information

Name

LOINC Code

WBC

6690-2

RBC

789-8

Hemoglobin

718-7

Hematocrit

4544.3

MCV

787-2

MCH

785-6

MCHC

786-4

RDW-SD

21000-5

RDW-CV

788-0

Platelets

777-3

MPV

32623-1
Immature Platelet Fraction % 71693-6

NRBC %

58413-6

NRBC #

771-6