Surgical patient support devices, namely, lateral positioners used in orthopedic surgery to position and stabilize a patient in the lateral decubitus position, including for hip arthroplasty; structural parts of surgical lateral positioners, namely, base plates, anterior support columns, support arms, back plates, hyperflexion plates, T-locks, adjustable rachet locks, and adjustment knobs; rail clamps specially adapted for attaching surgical patient positioners to operating tables; protective pads specially adapted for surgical patient positioners; cases specially adapted for surgical patient positioners and their components; medical apparatus and instruments for use in surgery, namely, soft goods in the nature of pads and pad sets, namely, round protective pads, lateral baseplate pads, and lumbar support pads.