[Nathans_Dad]

Without further info it is tough to say what might have happened. Hospitals have very stringent rules and building codes about limiting sparks or sources of ignition around oxygen outlets and patient care areas. Fires in the hospital are very rare. As I said above, there usually is some sort of outside ignition source, I'm not saying that it couldn't have come from a spark from a piece of hospital equipment, but the chances are greater that the source was somewhere else.

You mentioned she had a troubled life, was she a smoker or did she have friends who smoked? Is it possible someone tried to light a cigarette in the room? I'm not trying to cast aspersions at all, it's just that cigarettes are by far the most common source of ignition in a situation like this and I have seen plenty of people first hand lighting up cigarettes in hospital rooms (patients included) despite the fact that smoking is not allowed in the hospital.