Fig. 1From: Serious hazards of transfusion: evaluating the dangers of a wrong patient autologous salvaged blood in cardiac surgeryThe linkage diagram. The linkage diagram provides a visual depiction of the contributory factors and underlying causes leading to the adverse event in this case. Two factors, human and environmental factors, are involved in Nurse A's behavior. The unique actions of Nurse A are shown on the bottom, and the environmental factors are shown on the topBack to article page