Peripheral Blood Smear
A test where a drop of blood is examined under a microscope to look at the shape and type of blood cells.
Quick Summary
To investigate anaemia, infections (such as malaria) and blood cancers.
Size, shape and appearance of red cells, white cells and platelets.
No preparation needed.
Overview
A smear adds detail to a complete blood count.
It can show malaria parasites, abnormal cells and causes of anaemia.
What It Measures
Red cells
Shape and size.
White cells
Types and immature cells.
Platelets
Number and appearance.
How It's Performed
- 01
Preparation
Usually no special preparation. Tell the staff about medicines you take.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm with a thin needle.
- 03
Afterwards
Press on the spot for a minute. A small bruise is common; you can go back to normal activities.
Interpreting Results & Next Steps
Discuss with Doctor
A specialist reviews the slide and reports findings in words. Normal ranges differ between laboratories, ages and sexes; always use the range printed on your report and ask your doctor what your results mean.
If values are High:
Abnormal cells may point to anaemia types, infections or blood disorders.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Blood Smear(opens in a new tab) · MedlinePlus, US National Library of Medicine