It's always easier if it can be downplayed as a not-date if she isn't all that into you. Talk to her and establish some sort of connection that you guys have that can be parlayed into an excursion. Fake it if you have to.
If nothing else, on a Friday AM just be like, "God this weeks' been ridiculous, I can't wait to get out of here". She'll probably agree, and then you should say something like, "I could totally use a beer after we get off, want to come with?". If she puts up ANY sort of resistance, bail immediately. ANYTHING short of an absolute, "Yeah that sounds fun what time?" should be viewed by you as a HUUUUUUUGEEEEEEE red flag. With whats going on in the media these days, you don't want to ruin your career because you tried too hard and some nurse took offense and reported you to HR or something.
Same thing goes if she ends up wanting to grab that beer. Initiate initial non-sexual physical contact as much as you can with her and see how she responds. If she doesn't seem to mind then obviously thats a good sign. If she pulls away thats REALLY BAD sign.
Even if she's been responding positively to your advances you need to be super suave about going for the kiss at the end of the night. After you walk her home there's going to be pause, there always is, and then you should smile and say something like, "I want to kiss you right now but I always heard it was dangerous to start anything with the people you work with". If she says ANYTHING other than a very positive reaction JUST LEAVE.
It's much easier to chalk it up to a misunderstanding about intention and you both move on than it is to explain to your attending on Monday what happened if you end up going for it balls to the wall and she again think its like Al Franken when you're "attempting to aggressively kiss her" or whatever the hell.
Protect your sack bruh its hard out there for a pimp.