Hemostasis work-up is frequently requested in pediatric cares and can often seem complicated to interpret when certain results return to be abnormal. In addition, these biological tests are very sensitive and several pre-analytical conditions can influence them and skew the results, leading to erroneous analyzes and diagnoses. Indeed, systemic inflammation, anemia or even only the delay between blood sampling and analysis can make the results more difficult to be interpreted. However, when the tests have been carried out under good conditions, having in mind a few basic knowledge of hemostasis can easily help to first distinguish a pathology of primary hemostasis from a coagulopathy. Secondly, depending on the abnormal biological tests, complementary oriented assays may then be requested, ideally in a laboratory specialized in hemostasis, in order to confirm or rule out a true hemorrhagic pathology.
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