I was wondering, what different situations would knowing how to cauterize a wound be useful in survival scenarios?
Cauterization is tricky, and should be left to the experts.
Cauterizing tools came in our field medical packs in the military, and the only thing I used them for was lighting cigarettes when we couldn't find dry matches in the jungle.
Cauterizing like you see in the movies doesn't exist.
You stick a hot poker on a bullet hole, and all you are going to do is burn away the healthy skin around the hole and cause pain and more trauma to the victim!
Cautery is usually used INTERNALLY,
With pin point accuracy,
To stop bleeders that are too short, too torn up or too inaccessible to clamp or stitch off.
For instance, there is no way to stitch a liver that has been cut and is bleeding. A liver is like tying to put stiches in Jello, and every needle prick will cause that much more bleeding.
Enzymes in the liver keep it from clotting, so it will ooze blood until it repairs it's self no matter what you do, and you might not have enough blood to allow it to ooze for two or three weeks...
In comes the Cautery tool, and you simply 'Sear' the surface of that liver closed so it isn't leaking as much.
(You will NEVER get a liver to stop seeping blood, only internal repair can do that)
Remember, a bunch of your internal organs are VERY soft and delicate, so sticking a hot poker in there and rooting around is a BAD idea!
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And like the old 'John Wayne' movies, if you stick a hot poker in a bullet hole, all you are going to do is succeed in doing is making a nice tunnel for infectious materials, and make it MUCH harder to get the bullet out...
Heat Seared tissue DOES NOT stitch it's self together.
It will replace it's self from below, but it will not stitch together with the 'Far' side of the hole or wound.
Large, gaping flesh wounds are sometimes cauterized when help is a LONG way off...
The idea is to control bleeding, without much regard to sanitation or what it will do to surrounding tissue.
I remember seeing a guy in Central America that was shark bit in the thigh about 48 hours from shore, and the crew 'Cauterized' the gaping hole to keep him from bleeding out since they had no medical kit and no way to control the hemorrhage...
It was a
HORRENDOUS Wound!
What the shark hadn't taken, the cauterizing had destroyed!
I just couldn't believe he survived it!
Most of the upper thigh next to the hip joint was gone, and the thin layer of scar tissue that had formed since the attack by shark and boat mates, you could actually see the two parts of the hip ball & socket work through the scar tissue...
Anyway, cautery is best left to the professionals...