[UNDERSTANDING REPORTS]
What a complete blood count actually measures
A CBC report has a lot of rows. This is what the main groups describe, and why doctors read them together.
A complete blood count measures the cells circulating in your blood. The report is usually split into three families of results: red cells, white cells and platelets.
Red cells
Haemoglobin, red cell count and the indices (MCV, MCH, MCHC, RDW) describe how many red cells you have and what size and colour they are. Those size clues are useful — different causes of low haemoglobin tend to produce different index patterns, which is why doctors rarely stop at haemoglobin alone.
White cells
The total leucocyte count plus the differential (neutrophils, lymphocytes, monocytes, eosinophils, basophils) reflects immune activity. Counts shift with infection, medication, stress and many other factors, so a single value out of range is not automatically meaningful.
Platelets
Platelets are involved in clotting. Very low or very high counts are flagged for review before a report is released.
What a CBC does not do
A CBC does not name a disease. It narrows the field and tells a clinician what to look at next. Take the report to the doctor who ordered it rather than matching values against ranges found online.
References
- Reference list to be added by the medical review team.
Information on this site is educational. It does not replace a consultation, diagnosis or treatment plan from a qualified clinician. Test selection should be based on a doctor's advice or an appropriate clinical assessment.