Probably Nolan’s explanation that he could make it is in her words because she told Bane she wanted him to survive a bit longer.

I don’t even want to imagine the kind of pain you get from being stabbed, but I know I sliced my index finger this year while cutting bread and it was an immense pain (for a short time)

You’re right and I know it’s fiction and not realistic, but since we’re shown he’s suffering while she stabs him, it still bugged me because I imagined him bleeding all the way

That’s a unique point of view, thanks!

You also just unlocked a memory of mine: a close friend’s mom once got stabbed close to the heart by a mugger. She went back home and drove herself to the hospital and the nurse was shocked since she couldn’t understand how my friend’s mom made it in her condition.

I guess sheer determination can do miracles!

Well, it is a meme kind of thing in the How It Should Have Ended YouTube channel and often given as an explanation that he can do anything he wants (putting him on par with Superman). Here’s a post about this