Figure 84-1 Schematic diagram of the generic architecture of model-based patient simulator systems. The simulator generates a representation of the patient and the work environment with appropriate interface hardware, display technologies, or both. The representation is perceived by the anesthesiologist, whose actions are then input to the simulator through physical actions or input devices. The behavior of the simulated patient is determined through sets of interlinked physiologic models and control logic that are manipulated by the instructor or operator through a workstation that allows selection of different patients, abnormal events, and other features of the simulation. ICU, intensive care unit; OR, operating room.