Complete Blood Count (CBC): What the Test Measures
A complete blood count measures red blood cells, white blood cells, and platelets. It helps assess anemia, infection, inflammation, and some bleeding or clotting issues. The report includes hemoglobin, hematocrit, and a differential that breaks down white cell types. Abnormal results are common and may be temporary or benign, but they can also point to a condition that needs evaluation. A CBC is often part of routine blood work and is interpreted together with other findings.
Key Takeaways
- A complete blood count measures red cells, white cells, and platelets.
- It helps assess anemia, infection, inflammation, and some bleeding or clotting issues.
- The report includes hemoglobin, hematocrit, and a differential of white cell types.
- Abnormal results are common and may be temporary or benign.
- A CBC is often part of routine blood work and is interpreted with other findings.
Frequently Asked Questions
What does a CBC include?
It typically includes red blood cell count, hemoglobin, hematocrit, white blood cell count with differential, and platelet count.
Do I need to fast for a CBC?
Fasting is not required for a CBC alone, though it may be part of a panel that requires fasting.
Can I order a CBC without a doctor?
Yes, CBC testing is widely available through direct-access labs.
What does a low hemoglobin mean?
It suggests anemia, which has many causes. A clinician evaluates it with iron studies and other tests.
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