Used Foley

Hello! I just started working for hospice and I am wondering about a few things. When is it appropriate for an LVN to push the PCA button for a pt? I say "NEVER!" but I have a few scenarios I have seen during some visits without LVN present but I'm sure they post one overnight in certain cases. Can an LVN in California push the button in any of these situation? LVN in california cannot push meds through a syringe through a saline lock/iv/etc minus your typical common iv fluids etc. 1. Pt diagnosed with cancer and is very weak and has a PCA pump. pt asks you to push the button for pain relief. 2. Pt diagnosed with cancer but does not respond to verbal or tactile stimuli and has a PCA pump. pt is moaning and has facial grimacing. 3. There is an order for LVN to push the button on a PCA pump when they made a determination CA pt who does not respond to verbal or tactile stimuli has facial grimacing and also is moaning and is unable to push button by self. They would probably do this to adjust base dosage. When is it appropriate? Or better yet, where can I find literature about this?