I'd like to think this other hiker rendered immediate assistance and administered first aid to stem the bleeding and try and save her life but there's no mention of this happening in the story.
Considering it was the 911 responders who scattered the coyotes and not the other hiker, it seems the other hiker didn’t do anything to help while the coyotes had at her. If she picked up a big stick and went after them, the coyotes would have run away. They are cowards. Too bad.