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A blood smear is a diagnostic test used to look for abnormalities within the blood. The cell types are examined under a microscope for unusual shapes or sizes. There are three main cells within the blood that the test focuses on: red cells (which ...
A partial thromboplastin time (PTT) test helps doctors assess your body’s ability to form blood clots. Each time you bleed, it triggers a series of reactions known as the “coagulation cascade.” Coagulation is the process your bod...