Final answer:
The single most important indicator in critical illness is blood pressure. In the case of Benjamin, the patient in the given scenario, his low blood pressure (90/60 mm Hg) is a concerning finding and indicates that his cardiovascular system is under stress.
Step-by-step explanation:
The single most important indicator in critical illness is blood pressure.
Blood pressure is a measure of the force of blood against the walls of the arteries.
In critical illness, blood pressure is closely monitored because it can provide important information about the state of a person's cardiovascular system.
In the case of Benjamin, the patient in the given scenario, his low blood pressure (90/60 mm Hg) is a concerning finding and indicates that his cardiovascular system is under stress.