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TABLE 3  Acute Hemolytic Anemia: Presentation and Management
              Cause              Presentation             Supporting Evidence              Management
              DIC      History of underlying cause: sepsis,   Normocytic anemia  Evaluate and treat underlying cause
                         trauma, malignancy, heat stroke,    Prolonged PT/aPTT  Platelet transfusion (if <50,000/mm )
                                                                                                        3
                         liver disease              Elevated D-dimer           Consider TXA if active bleeding
                       Fever                        Thrombocytopenia           Consider FFP, cryoprecipitate transfusion
                       Petechiae/purpura            Low fibrinogen
                       Bleeding
                       Thrombosis
              HUS      Bloody diarrhea              Elevated SCr level         Supportive care
                       Abdominal pain               Thrombocytopenia           Dialysis may be needed
                       Oliguria                     Schistocytes on peripheral smear  Avoid antibiotics
                                                    Normal coagulation panel
              TTP      History of ADAMTS13 deficiency  Elevated SCr level      Plasma exchange
                       History of HIV, pregnancy, use of   Thrombocytopenia    Consider FFP while awaiting plasma exchange
                         acyclovir, clopidogrel, quinine  Schistocytes on peripheral smear
                       Fever                        Normal coagulation panel
                       CNS abnormalities
                       Oliguria
                       GI bleed
              AIHA     Provoking medications: penicillin,   Positive direct antiglobulin test  Corticosteroids:
                       cephalosporins, NSAIDs,      Spherocytes on peripheral smear  IV methylprednisolone 100-200mg divided
                       hydrocortisone, isoniazid    Normal coagulation panel     over 24 h
                                                                               Oral prednisone 60-100mg schistocytes causes
              AIHA, autoimmune hemolytic anemia; aPTT, activated partial thromboplastin time; CNS, central nervous system; DIC, disseminated intravas-
              cular coagulopathy; FFP, fresh-frozen plasma; GI, gastrointestinal; HIV, human immunodeficiency virus; HUS, hemolytic uremic syndrome; IV,
              intravenous; NSAIDs, nonsteroidal anti-inflammatory drugs; PT, prothrombin time; SCr, serum creatinine; TTP, thrombotic thrombocytopenic
              purpura; TXA, tranexamic acid.

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              Office of the Surgeon General, the Department of the Army, or   10.  Beutler E, Waalen J. The definition of anemia: what is the lower
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              Authorship and Contributors Statement                 types of mild anemia in the elderly: the “Health and Anemia” pop-
              All authors conceived the review concept, wrote the first draft,   ulation-based study. Haematologica. 2010;95(11):1849–1856.
              and read, provided critical revisions for, and approved the fi-  12.  McLean E, Cogswell M, Egli I, Wojdyla D, de Benoist B. World-
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              Conflicts of Interest                              13.  Kassebaum  NJ; GBD 2013 Anemia  Collaborators. The global
              The authors have no conflicts of interest or relevant disclo-  burden of anemia. Hematol Oncol Clin North Am. 2016;30(2):
              sures to report.                                      247–308.
                                                                 14.  Kristinsson G, Shtivelman S, Hom J, Tunik MG. Prevalence of
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              Funding
              We received no funding for this research.             is our response? Pediatr Emerg Care. 2012;28(4):313–315.
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                                                                    presenting with apparent life-threatening events.  Acad Emerg
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