In both the Medicine skill, and in the Medical Expert feat, there is mention of treating deadly wounds.
However, "deadly wounds" doesn't seem to be defined anywhere. Is this just when someone has been reduced to 0 hit points? Is it hit point damage in general (meaning you can use the skill and feat to heal HP damage) or is it strictly from some sort of critical effect (like Wound / Severe Wound)?
I'm not asking about the utility of the skill or feat - that's been asked before in various way, I'm trying to understand the definition of Deadly Wounds is all. Thanks!