Abstract
The Trokar-cystoscope opens new extraurethral ways for diagnosis and operative therapy and also for photography, cinematography and television of diseases of the prostate and bladder. It is indispensable for cryosurgery of tumours of the prostate and bladder. The Trokar-endoscopes are made by Richard Wolf from our date between 16 and 24 Fr. in all desired technical and optical variations.

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