I was visiting a family relative in the ICU who was pretty drugged up on pain meds and the first thing he said to me was: 'You smell very nice.'
I was wearing Eau Claire des Merveilles. http://www.fragrantica.com/perfume/Herm … -9583.html
It has medium silage and is very long lasting. 2 sprays is enough for it to last me all day. It has a bit of vanilla but it is very dry. It is a comforting and attractive scent.
I know you asked for patchouli but as many people dislike it and you work closely with patients, I would not recommend it.
Good luck on your search!
I am not picky, just discerning.