Last night I worked night shift on my medsurg/stroke/oncology floor. A nurse came out to the nurse's station and asked if any of the senior nurses were around. I said no, why? She said I think my patient is dying. I said is she a DNR? Is she comfort care? She's like she's a DNR and they were kind of expecting her but not so soon. I said oh and we ran back to the room. I walked in and she was unresponsive agonal breathing HR in 30s and I asked do you want a RRT? I knew nothing about the patient besides she was a DNR? The nurse looked at me and then she said ya. I called a RRT and when they showed up she had already passed. The nurse had sat on her for over an hour "while she was on her way out." As she called it. The RRT team was like why would you call a RRT on a DNR?? It was a change in patient status and her RN told me to. The RN blamed me. And said I called it. I told my manager about the situation. Just because she's a DNR doesn't mean you don't do anything. Did I do something wrong??? The nurse is notable for not being competent i knew nothing but the patient was all but passed when I walked in.