[Hyperextending ruptures of vessels in course of arthroplasties of the hip and knee (author's transl)].

The authors referred specific complications in the course of arthroplasties of the hip and of the knee: hyper-extending-ruptures of vessels in sequence of indirect lesions. Causes of these so far not described complications are extreme passive articulations of hip respectively knee during operation. Clinical symptoms are enumerated, the pathogenetic mechanisms explicated and directions for treatment given. Important are the knowledge of these complications and the measure for their prophylaxis.