Transfusion Medicine and Hemostasis, Fourth Edition continues to be the only "pocket-size" quick reference for pathology and transfusion medicine for residents and fellows. It¿s helpful to all physicians and allied health professionals who order and administer blood components, cellular therapies, and specialized factors for hemostatic abnormalities, who order coagulation testing, and those who consult and care for these often very ill patients. The book is ideal for pathology, medicine, surgery, and anesthesia residents, transfusion, hematology, and anesthesia fellows, and certified and specialized practitioners, as well as medical technologist in transfusion, cellular therapy, hematology, and coagulation. The new edition covers the many new developments that have occurred since the previous edition to include new blood products, new indications or clinical conditions in which blood products are used. Similarly, new hemostasis testing is introduced as well as new clinical scenarios due the COVID-19 pandemic relevant to Hemostasis & Transfusion Medicine. This includes COVID coagulopathy, Vaccine Induced Thrombotic Immune Thrombocytopenia, Pediatric reference range in coagulation testing, Platelet rich plasma and MNC products ¿ CAR-T cells.