A NEW AIR-DILATING URETHROSCOPE.
ERNEST G. MARK, M.D.KANSAS CITY, MO.For some time past I have been an advocate of the more general use of the endoscope in the treatment of chronic urethritis and urethral lesions. While my work with the various instruments designed for endoscopy has given me good results, I have at the same time felt the need of improved technic in this work. The advent of the mignon lamp of Koch of Rochester was a distinct advance over the platinum loop of the Oberlænder instrument and the various forms of reflected-light instruments. The application of the air-dilating principle of Schall and Fenwick, while an advantage, was more than offset by the disadvantages of the means of illumination.Realizing the advantages of air-dilatation applied to urethroscopy and of the cold lamps made in this country, I devised the instrument which is here illustrated, and which, I believe,