In poetry this form is known as terza rima, and also called "tercet form" or "three-line stanza form," which typically goes ABABCB, CDCDED, ...
You can see a very famous example of terza rima in Dante's Divine Comedy, and in fact many claim the form was invented by him.
Here's another example from "Acquainted With The ...
Considering you are describing situations where serious injuries happen without the proper equipment (or people) available to treat them, there is a field of expertise very familiar with this problem: military field medicine. Soldiers get injured all the time on patrols or in the heat of battles, sometimes very far away from the medical facilities that can ...
Read a textbook on forensic science. They cover all the fun topics like:
if ripped apart with a nail, which direction does the skin shear
was she really raped
bullet exit wounds
hacked apart cadavers
this was the first 20 pages.
Find it at a bookstore near a medical doctor university or online.