Cord-Cut (紐切り, Himokiri) refers to the countless "cords" that make up the human body with include things such as blood vessels, lymph ducts, tendons and nerves.
Scalpel Combat utilized the medical knowledge of the user to ever the opponent's cords. Allowing them to sever tendons, nerves, and other cords within the bodies of their opponents, so they can't move, become debilitated by pain, or use some senses.