What is this "buttonhole technique" i keep hearing everyone talking about?

Dialysis treatment: The buttonhole technique is a term used for inserting a blunt needle into a vein/fistula of a person who is undergoing blood/hemodialysis.It is less painful as the blunt needle traverses a tract which has been created by a needle, so it is like a button going into a button hole.

Laparoscopy: That is doing surgery by passing a scope into the body through a small cut instead of opening the abdomen.