If you call me at 1:19 am complaining of nausea and vomiting, and I assume that you will follow my instructions to go to L&D.
Fail on Patient #1.
I assume most patients would show up for her surgery.
Patient #2 also fails.
Patient #1 calls at 3:30 pm, complaining of nausea and vomiting. Shelly, working phones, didn't know that I had talked to her earlier and told her to go to L&D.
"Oh, that's what the doc said this morning when I called, but I didn't feel like going."