Yeah, I don't think those who undergo severe trauma make it through. You've never really ending the journey, and it'd nullify the whole concept of getting through in four hours or roughly four years, etc, if they did make it. One of the key points in the game seems to be that you have to physically go through that temple to end the journey.
Incidentally, another example to consider is the huge amount of people that make up the beaver dam in the forest. You can clearly see a lot of them them with horrified expressions on their faces and such, but they obviously aren't still 'alive', nor sprouted.
Whether these guys are actually completely
dead or are simply paralysed is up for debate since as we know one of the LSA agents managed to keep going just fine with most of his body missing.