Now that was a great episode.

Hi I am a retired registered nurse and practiced in the operating room. The wound "scraping" is called debridement. It is used extensively in burns and other traumatic injuries. Also in medical conditions such as Diabetes where tissue is compromised. The goal is to eliminate devitalized tissue, necrosis, tissue which has died . This dead tissue will never heal and must be removed because it will cause bacterial toxins to
circulate in the blood stream and lead to septicemia, which is blood infection going thru the body, which will likely cause death, or at least effecting good tissue ( organs , etc) Along with debridement , however , comes copious amounts of "irrigation" with sterile saline or sterile water. I doubt Daniel would be alive since besides antibiotics he needs WATER. He has scant chance at enough water , sterile, or otherwise to keep his wound cleansed. Also , diet plays a major role here , enough calories , enough 'good' food such as protein to
Help build new tissue. Bottom line, Daniel would not likely be alive.
I think Daniel is a great character, maybe he would make it cause he's so strong . But this is a fantasy program so anything goes .