There's also PALS.
There is, but they are 9-5, M-F, so of limited help. The hospital I work at has a Matron Help phone line that is answered 24/7. I don't know how good they are, but surely this should be standard in all hospitals. There has to be a patient safety escalation route that can bypass any local stonewalling.
When my DH was 4 days post major, major surgery and had just left ICU it was obvious to both of us (knowing him, and knowing what a patient who is "going off" looks like from having worked on wards about a hundred years ago) that all was not well. The nurses just reassured us everything was fine.
Fortunately, the on call consultant surgeon took one look at him and said "I don't care what the obs say, just look at him!", sent him for an urgent CT and took him back to theatre. I truly believe he saved his life.