Most emergency nurses, I think, would agree that it was difficult because many times patients just didn't fit into one of the three categories. The five-level system is a refinement; it is more scientific.

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The No. 1 point of this program is that any waiting that has to happen is safe for those patients who have to wait.

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A Level 4 patient needs one resource; that could be something like a sprained ankle we have to splint. And a Level 5 requires no resources.

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An experienced nurse can tell immediately - from the patient's demeanor, skin color, behavior. You just know.

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