“… 1 , 4 Therefore, excess anesthetics will flow out when cutting is commenced during FGPS. Moreover, there might be body fluids from the urethra, vagina, and anus during surgery, 5 and sometimes disinfection has to be done again after skin preparation and draping. Without efficient drainage, the disinfectant, body fluids, and anesthetics may dampen the sterile drapes on the extension shelf, 4 which poses a risk to the asepsis of both the shelf and the surgical instruments on it.…”