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1. Or QR on the patient's wrist identifier.

2) Agreed OT, but "emergent" to roughly mean "urgent" is pretty established in medicine. Here's a more thorough discussion:

http://blog.amamanualofstyle.com/2013/01/23/emergency-emerge...

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QR code on the wall is probably better in this case because it's easier to spot from a head mounted display. The barcodes on wristbands are used mainly for patient ID when administering medications, where the user is close to the patient. Being able to walk into a room and look at the same place each time has the advantage here.

Maybe. But the ERs I work in rarely have one patient rooms, and the patients have a tendency to wander.

An apparently deep discussion, but the author cherry picks definitions to match his argument. For example, he states two definitions for Merriam-webster, but they are only definitions 1a and 1b. There are 4 more.

Stedman's dictionary requires an account, so I can not verify at this time.

Well, here's Stedman (a standard medical dictionary) on 'emergent' from...a hundred years ago:

emergent 1. Arising suddenly and unexpectedly and calling for quick judgment and prompt action.

http://books.google.com/books?id=OG0XAQAAMAAJ&pg=PA290&dq=st...

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