Ok, the headline leaves out the little detail that the hiker is a trained nurse, which was able to self-assess that if he wasn't dying already, that he has been fucking lucky with the path through the body.
But in every other civilized country they wouldn't have to be able to self-assess something like that, they would call emergency services instead of gambling with the possibility that some nicked artery or a wounded organ gets worse because of the trek - especially the path out on the lower back just screams "kidney injury" or "danger to the blood supply of that kidney".