The patient has slipped on ice with his healthy foot.The joint has no visible defect, now it should be checked if it is functional.Due to the fall an eruption from the shaft approach.The patient has slipped with the contralateral side when clearing snow, has supported himself with the prosthesis, went to the flexion stop and then the rupture of the shaft connection happened.The air in the hydraulics was already noticeable before the event.The patient got stuck with the contralateral side and then fell on the prosthesis!.
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