title: Coagulation studies: prothrombin time, partial thromboplastin time, bleeding time.
abstract: Three coagulation tests available in the emergency department are described in this article. Methods, results, and implications in the bleeding patient are reviewed.
mesh_terms: D001760:Bleeding Time; D001777:Blood Coagulation; D001778:Blood Coagulation Disorders / Q000175:diagnosis; D001779:Blood Coagulation Factors / Q000032:analysis; D001780:Blood Coagulation Tests / Q000379:methods*; D001791:Blood Platelet Disorders / Q000175:diagnosis; D001792:Blood Platelets / Q000502:physiology; D001800:Blood Specimen Collection / Q000379:methods; D003937:Diagnosis, Differential; D004211:Disseminated Intravascular Coagulation / Q000175:diagnosis; D004630:Emergencies; D005177:Factor XIII Deficiency / Q000175:diagnosis; D005342:Fibrinolysis; D006470:Hemorrhage / Q000175:diagnosis; D006487:Hemostasis; D006801:Humans; D010314:Partial Thromboplastin Time; D011517:Prothrombin Time
chemical_list: D001779:Blood Coagulation Factors