Peripheral Blood Smear
A small drop of blood is spread thinly onto a glass slide, and then dried to make a smear. After treating with a special stain (staining the smear), it is observed under a microscope. The test gives some vital information about the types of blood cells, their number, shape and appearance. Peripheral blood smear is helpful for the diagnosis of blood cells’s disorders, deficiencies and diseases.
Why is the test ordered?
The test is ordered as a follow-up test to CBC if the results are abnormal to assess different types of blood cells. The test is also helpful in diagnosing and monitoring several conditions that are associated with blood cells.
When is the test ordered?
The test may be ordered when a person is presented with the signs and symptoms suggestive of a condition affecting the production of blood cells. Some of the typical signs and symptoms to indicate blood cell disorders include weakness, frequent nose bleeds, fever, pale skin colour, fatigue, enlarged spleen, bleeding and bruising. Peripheral blood smear examination can also be used as a monitoring test for an individual undergoing treatment for a blood disorder.
How is the sample collected?
A blood sample is collected from the arm.
How to prepare for the test?
There is no need to prepare for the test.