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When a patient needs certain blood work done for testing of potential conditions, one way of testing the blood is by doing a blood smear. A blood smear is done by doing a finger prick, extracting a drop of blood, and placing the drop of blood on a glass laboratory microscope plate. Once the drop of blood is on the glass plate, a separate glass plate is used to spread the drop of blood out. It is done by "smearing" the blood across the bottom plate. The desired and only lab-accepted "smear" results in a feathering of the blood, or a increasingly thinning of the amount of blood across the plate, in turn creating a feathered appearance of the blood on the plate. It helps the lab chemists look at the right amount of blood for determining the results of the blood test.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoBlood smears are made with a feathered edge because this way the cells will be in a monolayer and won't be touching one another. To get a good feathered edge, one needs to use the right amount of blood and the correct spreading method.
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