yea forget scrubs and an expensive stethoscope (it'll get lost and unless shes on a cardiac specific floor she won't need one that nice).
You could make sure to get her a name tag for her stethoscope so when she does lose it, it'll make its way back to her. compression socks would be a good stocking stuffer.
the best nursing related gift i got was this watch.
titanium light, washable, durable, date (always handy for documentation purposes), 1hr timer as certain meds have to be given at X time intervals and to keep track of time during codes and a 24hr indicator was a bonus but comes in handy after working 16hr straight.
http://i.frameoftime.com/Citizen-Watch/Titanium/Mens/CA0265-59E/Citizen-Mens-CA0265-59E-Black-Titanium-Chronograph-Authentic-Watch.jpg