What equipment separates the sterile from the nonsterile areas at the head of the bed?

a. IV poles or metal bars
b. Electrosurgical unit
c. Lithotomy posts
d. Surgical headlight

ANS: A
Nonsterile equipment that must stand near the sterile field is isolated from the sterile area by a barrier drape. The anesthesia provider or circulating nurse fastens the drape to IV poles on each side of the equipment that stands above the level of the sterile field or near it. The drape over the patient or a separate single sheet is extended from the OR bed upward in front of or over the nonsterile equipment.