Who made the first practical cystoscope: Nitze or Leiter?

Positions

1. Nitze: the conception and the method

   German and European accounts treat Nitze as the inventor. He conceived a lens telescope with its light at the tip, demonstrated urethroscope and cystoscope on a corpse in Dresden on 2 October 1877 with Dresden and Berlin makers, and published the method in Vienna in 1879. Germany's urological prize carries his name.

   Sources

   1. Neue Deutsche Biographie: Nitze, Maximilian Secondary
   2. EAU History Office: Nitze's cystoscope Museum or society

2. Leiter: the working instrument

   Leiter built the 1879 instruments and, in the EAU's account, claimed priority for the cystoscope for himself. His 1880 booklet describes the instruments as constructed by Nitze and Leiter. Writing in 1887, Otis Newell of Boston credited Leiter's efforts with bringing electric light into endoscopy and described Nitze's earlier instruments as too complex and costly for wide use.

   Sources

   1. EAU History Office: Nitze's cystoscope Museum or society
   2. J. Leiter, Elektro-endoskopische Instrumente. Beschreibung und Instruction zur Handhabung der von Dr. M. Nitze und J. Leiter construirten Instrumente (Wien: Braumüller, 1880) Primary
   3. Newell 1887, on the electric-light cystoscope (NLM Digital Collections) Primary

3. Neither was first with light inside the body

   Julius Bruck of Breslau had used a water-cooled platinum lamp in 1867 to transilluminate the mouth and, from the rectum, the bladder. A French maker, Gustave Trouvé, is also said to have claimed the idea, though that claim is weakly sourced.

   Sources

   1. Wallace 1973, New lamps for old (RSM presidential address; BAUS archive) Secondary
   2. Roswell Park 1883 (NLM Digital Collections) Primary
   3. German Wikipedia entry on Maximilian Nitze, as cited in dossier 04 §3.1 (no URL given in the kit) Secondary

Evidence

The collaboration is documented from June 1878. Leiter's first instruments could not be used clinically, Nitze moved to Vienna in December 1878, and Dittel presented the finished cystoscope on a living patient on 9 May 1879. Relations then soured: the EAU describes Nitze as demanding and Leiter as ambitious, and Wallace, citing Leiter, says Nitze began to go other ways before the clinical evaluation was complete. Nitze left Vienna by December 1879 and settled in Berlin. The rivalry continued in competing lamp cystoscopes in 1886-1887, Leiter's with Dittel and Nitze's with Hartwig.

Current standing

Posterity uses both names: the Vienna museum of endoscopy and its research society are named for Nitze and Leiter. Nitze's name dominates German urology; Leiter's part is less known in the English-speaking world. The film follows the double name. Nitze's own step, on the dossier's reading, was the combination of a distal light with a lens telescope in a catheter-sized shaft.

All sources