Complete Blood Count (CBC) Without Differential
Also known as: Hemogram
Use
See comments in Complete Blood Count (CBC) With Differential [005009].
Special Instructions
Not provided.
Limitations
The CBC Without Differential does not provide specific white blood cell subtype counts, which may be necessary for diagnosing certain conditions. Hemolysis, clotted specimens, or incorrect volume in tubes can affect results and lead to rejection. The test requires whole blood collected in EDTA, and samples must not be frozen as this destabilizes the specimen, making it unusable for accurate measurements.
Methodology
Automated Analyzer (Hematology)
Biomarkers
LOINC Codes
- 58410-2 - CBC Pnl Bld Auto
- 6690-2 - WBC # Bld Auto
- 789-8 - RBC # Bld Auto
- 718-7 - Hgb Bld-mCnc
- 4544-3 - Hct VFr Bld Auto
- 787-2 - MCV RBC Auto
- 785-6 - MCH RBC Qn Auto
- 786-4 - MCHC RBC Auto-EntMCnc
- 788-0 - Erythrocyte DistWidth Bld Auto
- 777-3 - Platelet # Bld Auto
- 58413-6 - nRBC Bld Auto-Rto
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
Fill tube to capacity.
Minimum Volume
0.5 mL (500 μL for pediatric microtainer capillary tubes)
Container
Lavender-top (EDTA) tube
Collection Instructions
Invert tube 8 to 10 times immediately after tube is filled at the time of collection.
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Hemolysis; tube not filled with minimum fill volume; specimen drawn in any anticoagulant other than EDTA; specimens diluted or contaminated with IV fluid; clotted specimen; improper labeling; transfer tubes with whole blood; lavender-top (EDTA) tubes received with plasma removed
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 day |
| Refrigerated | 3 days |
| Frozen | Unstable |
Other tests from different labs that may be relevant