Explore the complexities of blood transfusion in emergency medicine through this 29-minute lecture from The Center for Medical Education's EM & Acute Care Course. Delve into the concept of blood as a liquid tissue transplant, examining topics such as hepatitis C, the trolley problem in medical ethics, and the rationale behind transfusions. Compare old versus new blood practices, investigate transfusion strategies in severe sepsis, and analyze the implications of lower versus higher hemoglobin thresholds. Gain evidence-based insights and practical recommendations for diagnosis and therapy in emergency care, synthesized from a comprehensive database of over 17,000 abstracts and combined with expert clinical experience.