[P. L. Friedrich and the problem of wound infection (author's transl)]

For the first time P. L. Friedrich proved wound infection to be a local process for 6 to 8 hours. After total excision such wound can be treated like a sterile one. For the first time Friedrich also realised the importance of this time-limit which however was often misinterpreted. He never excised wounds in his patients totally, but always practised wound débridement after von Bergmann-Lexer.