Research: Googled 'Removing knife from a wound' and checked the archives here. Unfortunately, all of the first aid, while helpful, states something along the lines of "Do not try to remove the knife yourself; let a medic do it."
Character A shows up on Character B's doorstep, bleeding from multiple injuries and has a knife impaled in his forearm. He refuses to let B call 911, but instead tells her to call C, a nurse who usually patches him up. (Not really trying to hide the fandom here, lol.)
1) How does C get the knife out of the wound safely? Or as safely as possible, since getting A to a hospital is out of the question. And what are emergency first aid steps leading up to, and after the removal?
2) The knife has missed the main arteries, though I'm not sure if this is something C will be able to tell, just from looking at the knife in the wound. Is there any way that she can know, short of taking out the knife and hoping that nothing spurts?
(C has been giving B info on how to look after the other injuries as far as 'pressure, no tourniquet' and other info I've gotten off of Google. It's specifically removing the knife that has me stumped.)