Because they can.
Yatto
Robert P
RP
D016292:Procedural Sedation / Q000706:statistics & numerical data; D016099:Endoscopy, Gastrointestinal; D006801:Humans; D006993:Hypnotics and Sedatives; D015742:Propofol
D006993:Hypnotics and Sedatives; D015742:Propofol