Usually called the doctor. Or the caretaker.

I had to tell him stuff over and over again. We had the same conversations a lot. As the years wore on, he was always in pain. He got angry a lot, was frustrated a lot, got...disturbingly sad...a lot. There was nothing I could do. There was nothing I could ever do.

I went through a lot of that with my ex, although in her case it was an on-going process rather than a single traumatic event. After 7 years, I'm still trying to let go of my self-loathing over not being able to fix her.

As I'm sure many have told you, it's not your fault. In the end, all you can fix is yourself.