Petechiae
How is the disease diagnosed?
Diagnosis of petechiae begins with the history and physical exam. Blood tests are usually done, including:
bleeding time, or the amount of
time it takes for the blood to clot
tests that measure clotting abilities, such as a prothrombin time or partial thromboplastin time
complete blood count, or CBC
platelet count
Platelets are blood cells that aid in blood clotting. If a person has too few of them in the blood, the person may be more likely develop petechiae. A bone marrow biopsy may be done in some cases.
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