A sterile pressure pad assernbly, system, kit and method uses a cage assembly comprising an enclosure and a pad assembly configured as a generally rectangular pad disposed adjacent the patient's limb near the joint to be extended and/or distended. The pad may be affixed by adhesive to the outer surface of an arcuate side and formed from suitable foam and cell structure materials that can be sterilized such as, for example, polyurethane-based foam. The enclosure of the cage assembly is configured with one or more ridges to sufficiently optimize a material strength to the arcuate side of the enclosure so as to not crush under pressure from the surgical distractor unit and/or the weight of the patient's limb of the patient when the sterile cage assembly and pad support a limb of a patient on a support bar as a surgical distractor unit positions the pad in abutment with a popliteal arm of a patient's knee joint during a medical procedure.
