What is this test?
A complete blood count (CBC) measures red blood cells (erythrocytes), white blood cells (leukocytes) and platelets, along with hemoglobin, hematocrit and red cell size indices, in a single test. It is the most frequently ordered test in routine check-ups and in the initial evaluation of anemia, infection, inflammation and certain blood disorders.
When is it requested?
Investigation of hematologic disorders, infections, blood loss
What does a high complete blood count (CBC) result mean?
A CBC value above the reference range on your report means different things depending on which parameter it is; often it reflects a temporary, harmless cause.
- High white blood cells (WBC): most often infection or inflammation; stress and smoking can also raise it
- High hemoglobin/hematocrit: frequently dehydration or smoking
- Steroid (cortisone-type) medicines can temporarily raise the white cell count
- High platelets (PLT): infection, inflammation, iron deficiency or after blood loss
- High eosinophils: allergies, asthma or intestinal parasites
- Long-term lung disease or living at high altitude: increased red blood cells
- Less commonly, blood disorders involving the bone marrow
What does a low complete blood count (CBC) result mean?
Low CBC values are most often seen in hemoglobin (anemia); low white cells or platelets are frequently linked to a passing infection or a medication effect.
- Low hemoglobin (anemia): most often iron deficiency; B12 or folate deficiency can also cause it
- Heavy menstrual bleeding, pregnancy or unnoticed blood loss
- Low white blood cells: may be temporary during viral infections such as the flu
- Low platelets: viral infections, or platelet clumping in the tube (falsely low count)
- Certain medicines (e.g., some antibiotics, chemotherapy) can lower blood cell counts
- Chronic kidney or liver disease
- Less commonly, bone marrow disorders
My result is outside the reference range. What should I do?
A CBC is interpreted as a whole, together with your symptoms; a slight change in a single value is often not significant. Share your results with your doctor, who may repeat the test or order further tests.
Reference ranges depend on the method, age and sex; always use the range printed on your report. This information is for general guidance only; consult your doctor for diagnosis and treatment.
Sample information
- Sample type: Whole Blood (EDTA)
- Tube / container: Purple-top tube
- Sample volume: 2 mL
Preparation
No special preparation is required. If you are unsure, ask us before your blood draw.
Testing and results
- Method: Coul
- Run schedule: Daily
- Turnaround time: 4 hours
Price and appointment
Add the test to your list to receive a price quote by e-mail, or call +90 850 640 07 30 / message us on WhatsApp (+90 537 301 22 14). You can have the test done at our branches or with our home blood collection service. Results can be viewed online with your Turkish ID number (or passport number for foreign nationals).