The introduction of catheters, bougies and electrodes into the eustachian tubes has become more and more a vital factor in the treatment of diseases of the middle ear. Dilatation of the collapsed tube, diathermy in chronic catarrhal deafness, fulguration of polypi at the orifice and other such allied conditions require accuracy not only of application to the local area, but also a maintenance of this application during the entire period of treatment.
The instrument used for many years to visualize the posterior nasal cavities is the nasopharyngoscope, which is merely a modification of the original Nitze cystoscope. In fact, there is hardly a visualizing instrument in nose and throat practice which has not been first developed by the urologists.
In 1921, I first became interested in developing a cannula to maneuver for direct application to the eustachian orifice, and it was not until 1923, through the aid of Mr. Reinhold
COLBERT RM. A NEW OPERATING ATTACHMENT FOR CATHETERIZING THE EUSTACHIAN TUBE. Arch Otolaryngol. 1929;10(4):421–422. doi:10.1001/archotol.1929.00620070095006
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