Answer to Question 1
ANS: C
One clock for standard time observation and one for time-elapsed periods, which may be used during cases with arterial occlusion, perfusion techniques, tourniquets, or cardiac arrest.
Answer to Question 2
ANS: A
Ceilings and walls are used to mount equipment to reduce clutter on the floor. The demands for ceiling-mounted equipment are diversified. The OR ceiling may be the location of mounting devices, utilities, and equipment, including the overhead lighting and mounting hardware for the anesthesia service column, microscope, cryosurgery devices, radiographic equipment, monitors, or televisions.
