Laser scalpels
From Backstage Lore Wiki
Laser scalpels are medical instruments that utilize coherent beams of light to make delicate incisions. The can cut flesh and instantly cauterize wounds. Because they also cauterize nerve endings, they are not preferred when pain is meant to be inflicted
A set of scalpels was used on Aritcio Kor-Azor so that he wouldn't expire during his allotted, and agonizing, punishment by the Speakers of Truth.