[The fiftieth anniversary of Miodonski's electro-rhino-spirometry]

On the 50th anniversary of the introduction of the electro-rhino-spirometry by Miodoński the author recalls its theoretical foundations and diagnostic possibilities. Moreover, it has been stressed that Miodoński's method was the first one which does not disturb the nasal function, and the development of electronics supported and widened its diagnostic possibilities leaving the theoretical basis for examination unchanged.