Programmed by some of the finest medical minds in the galaxy, Industrial Automaton's 2-1 B Series was the first commercially successful surgical droid. Each 2-1 B is equipped with a computer interface socket and tether; what it doesn't know about a patient's species or medical history, it can download from any medical mainframe.
The 2-1 B's servogrip pincer hands are precision-engineered for smooth, steady action. The core programming of 2-1 B surgical droids includes the "physician's code." This prevents the droid from refusing medical aid to any being (unless specifically ordered otherwise by an authorized operator). as well as preventing it from deliberately inflicting harm on an organic creature (except as defined by extensive guidelines for saving a life). This includes a stricture against engaging in combat.