Does Patty have a legally appointed person who can say that under no circumstances is Lola to be allowed on premises?
I ask because my great aunt was put in to a hospice about a year ago. She was a a very well known member of the community and constantly had little old ladies coming to visit...but because they didn't wash their hands enough, she kept getting sick from the visits. They also kept coming when she was asleep and waking her up, and my aunt was old and ill, so this was terrible for her. My mother was appointed as her...well, not sure the legal term, but essentially she was in change of managing affairs along with my aunts nurse, and she ended up working with the hospice to do away with visits unless my aunt requested to see someone.
It may be enough just to have Patty tell the staff that Lola is kookoobananas and she doesn't want here there. If not, talk to her about appointing someone to handle that kind of stuff.