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CBC (Complete Blood Count)

✅ Up to date🔬 Evidence: StrongHematology
Diğer adları: Blood count, CBC, Complete blood count
⚠️

Discuss your test results with your doctor. This page is for informational purposes only and does not provide a diagnosis.

⚡ Key Facts

• Evaluates three main cell groups in blood: red blood cells, white blood cells, and platelets • One of the most commonly ordered blood tests • Provides information about anemia, infection, clotting, and general health • Results are interpreted as a panel, not in isolation

🧪 What Does This Test Measure?

The CBC (complete blood count) evaluates the count, proportion, and characteristics of three main blood cell groups: red blood cells, white blood cells, and platelets.

📋 Why Is It Ordered?

Ordered for general evaluation, anemia or infection investigation, preoperative assessment, and monitoring of many medical conditions.

🔧 Preparation

No special preparation is required for the CBC. Fasting is generally not necessary and the test can be performed at various times of day.

📊 Reference Ranges

Hemoglobin — Men: 13–17 g/dL, Women: 12–15 g/dL WBC: 4,000–10,000/µL Platelets: 150,000–400,000/µL ⚠️ Reference ranges vary by laboratory, age, and sex.

⬆️ High Values

Elevated hemoglobin may indicate dehydration or polycythemia; elevated WBC may suggest infection, stress, or inflammation; elevated platelets may be reactive or related to a myeloproliferative disorder.

⬇️ Low Values

Low hemoglobin indicates anemia; low WBC may be associated with certain medications or viral infections; low platelets may be associated with immune conditions or bone marrow disorders.

⚙️ What Can Affect Results?

Dehydration, medications, exercise, pregnancy, altitude, and normal biological variation may affect CBC results.

🔬 Evidence Summary

Strong evidence: 1 guideline, 1 meta-analysis, 4 reviews, 1 observational study.

✅ Key Takeaways

💡

What you learned: The CBC provides a comprehensive overview of blood cell counts and characteristics. Abnormalities are evaluated alongside clinical context and may prompt further testing.

⛔

CBC results alone cannot diagnose specific conditions. Clinical correlation and additional tests are needed for definitive evaluation.

🔬 Sources Used on This Page

7 sources · Most recent publication: 2024
📋
Guideline
Expert society and guideline recommendations
1
source
📊
Systematic review / meta-analysis
Combined analysis of multiple studies
1
source
📖
Review
Comprehensive topic evaluation
4
sources
👁
Observational
Observational and cohort studies
1
source
Overall assessment: Evidence level for this topic is strong. This page is supported by 1 guideline, 1 systematic review/meta-analysis, 4 reviews, 1 observational study.

📝 Questions to Ask Your Doctor

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Last reviewed: 3/26/2026
Next review: 6/26/2026

🔗 Related Topics

🩺 Iron deficiency anemia🩺 Talasemi🧪 Ferritin🧪 Demir bağlama kapasitesi (TDBK)🧪 Vitamin B12🧪 CRP (C-reaktif protein)
⚖️ This page does not replace medical advice. Make treatment decisions with your doctor.
Content is based on scientific studies indexed in PubMed and current clinical guidelines.