Knives, rope, sticks, heated metal, paper bags, pens, and random clothing all come to the top of my head as things on hand used for improvised medical devices from tourniquets to braces to that thing where they have to poke a hole in your neck so you can breathe. An accurate phaser could be both the knife and the heated metal if what is cut needs cauterized!
In real like most things can be medical devices.
Knives, rope, sticks, heated metal, paper bags, pens, and random clothing all come to the top of my head as things on hand used for improvised medical devices from tourniquets to braces to that thing where they have to poke a hole in your neck so you can breathe. An accurate phaser could be both the knife and the heated metal if what is cut needs cauterized!