A hospital is interested in tracking the movements of heart patients through different units. The four units of interest are emergency admissions, surgery, intensive care, and recovery. Emergency patients (that is, people who have suffered heart attacks and were brought into hospital through emergency admissions) are always assigned to the intensive care unit for a period of observation following the emergency treatment. Once a doctor determines that is safe to do so, the patient is moved to a recovery unit. Of course, a relapse requires a return to intensive care. The surgical unit receives patients of two kinds: those who are scheduled for heart operations through non-emergency procedures (planned operations), and those who come from intensive care (semi-emergency operations). Only one patient in a hundred dies in surgery; the rest are always moved to intensive care after surgery. Of the patients in intensive care, whether or not they have previously had surgery, about 10 percent will undergo surgery; the others are moved into recovery after some period of intensive care. Once into recovery, most patients (95 percent) eventually either recover sufficiently to be discharged, but about 2 percent have to be returned into intensive care. The others die in recovery. Draw a transition diagram and set up an appropriate transition matrix.

Classify the states.