Patient positioning support apparatus with virtual pivot-shift pelvic pads, upper body stabilization and fail-safe table attachment mechanism

A torso support structure slidingly joined with a head-end portion of a frame of a patient support structure, the torso support structure being movable along a length of the frame head-end portion and including a driver for actuating said movement of the torso support structure along the length of the frame head-end portion, wherein actuation of said driver is synchronized with movement of a joint of the patient support structure.

A patient support apparatus for supporting a patient in a prone position during a surgical procedure, the apparatus comprising:

• a) an open fixed frame suspended above a floor;
• b) a pair of spaced opposed radially sliding joints associated with the frame, the joints including a virtual pivot point, a radius and an arc of motion spaced from the virtual pivot point, the joints being movable between a neutral position, a flexed position and an extended position with respect to the virtual pivot point, the arc of motion and the floor.

The apparatus according to claim 51, wherein:

• a) the frame is pivotable about the T-pin with respect to a joined vertical translator subassembly in response to vertical movement of the joined vertical translator subassembly.