american civil war amniotic fluid amputation aneurysm antibiotic autologous bacteria blood bank blood plasma calcium cancer cement centrifuge coagulopathy collagen contamination digital object identifier discectomy ectopic pregnancy embolism enzyme extracorporeal fresenius hematoma hemolysis heparin hip replacement hysterectomy knee replacement laminectomy organ transplant physical trauma platelet sepsis shoulder replacement splenectomy surgery thrombin tumor white blood cell