Yes, it's always part of the fun when visiting (lurking around the back corridors and basement tunnels) in hospitals, seeing what has been left lying around!
Take a tip from an Old Hand ... timing is everything. Evenings (night time) and weekends are certainly best, I've found.

Failing that, it would be nice to have some sort of business relationship with someone (
anyone) who can send us the odd Jiffy* Bag with half a dozen or so of the giving sets we need from time to time.
Cheers
Geoff
aka Phantom of the Hospital(s)
*
Other padded envelopes are available.