Abstract: Described is a rotation limitation module for a steer-by-wire steering system. Said rotation limitation module comprises a housing in which a shaft portion that is rotatable about a central axis and is able to be rotatably coupled to a steering wheel shaft or is configured as a portion of the steering wheel shaft is received. Furthermore provided is a limiter disk which by way of a sliding guide is coupled in a rotationally fixed and axially displaceable manner to the shaft portion and has an external thread which is driven into an internal thread of the housing. Moreover, the rotation limitation module comprises a first detent ring having a first detent wing, and a second detent ring having a second detent wing, both detent wings for limiting a rotation of the shaft portion being able to cooperate with the limiter disk. A steering wheel module for a steer-by-wire steering system is also disclosed, which comprises such a rotation limitation module.

Abstract: An OR table disposable cover includes a sheet, fluid absorbent on a top side, and fluid impermeable on an opposite, bottom side; a angled support wedge positioned in a head support region on the top side of the sheet; and a soft foam ring member on a top of the angled support which in concert with its underlying support wedge maintains a patient's head in a sniff position. Also provided is a barrier cover having a patient head support member adjacent one end, said head support member being canted at an about 15° angle to the cover, and an operating table carriage that interfaces with the patient either directly, or through a cushion that allows the patient's head to translate along an Y axis of the rail.