The document discusses the advantages of autologous blood transfusion which includes avoiding complications of allogenic blood transfusions such as infections and immunosuppression, benefiting patients with rare blood groups, and conserving blood resources. It describes the different types of autologous blood transfusion including pre-operative blood donation, acute normovolemic hemodilution, and blood salvage from surgical sites which can be used to replace lost blood during procedures. Contraindications and potential complications of each method are also outlined.