Surgical is an achievement/trophy in Dishonored.
How to Acquire[]
In order to get this achievement Corvo Attano must complete all the missions from Dishonored through to The Royal Physician killing less than 10 characters. To do this, he can either avoid enemies, through the use of supernatural abilities such as Blink and Bend Time, or by knocking them out using the Tyvian chokehold and sleep darts.