Looking for some procedures a doctor can perform without the use of medical equipment/machinery for a novel I'm writing. Some examples being (although I don't know the exact terminology for them): Cutting a hole into someone's neck, and using something like an emptied pen to allow breathing (What's this called? I think it was called traching or something?). Another example being using gunpowder to cauterize a wound closed (or any other combustible material).

Hopefully I haven't worded this too poorly, but I haven't slept in a day and a half! Basically I'm just looking for cool, out of the box [emergency] medical procedures that can be done in a post-apocalyptic situation, where it's life or death.

Thanks!

EDIT: just some background on my doctor character. He's a genius, and retains Doctorates in biomedical engineering, molecular biology, and organic chemistry. His career in this post-apocalyptic setting is a cybernetic engineer. A nuanced version of the cyborg-implanting mad scientist popular in lots of science fiction. This novel takes place far into the future, so things like cybernetic eye implants, and bionic arms are possible.. yet uncommon (due to lack of materials. Only a handful of materials, that are in good enough of a condition, have been saved.) So any procedures someone like that would be able to do.