Auscultation of the ear is a procedure integrated with tubal inflation which may be performed with or without the use of a tubal catheter.
Catheterization of the Eustachian tube was invented by a layman. His name was Edmé Gillis Guyot1; his occupation, postmaster at Versailles. He presented his invention to the Royal Academy of Science in Paris in 1724, after he noticed improvement of his ear trouble following application of the technique on himself. Guyot used the oral approach to the tubal ostium pharyngeum. Insertion of the catheter through a nostril was first performed by Archibald Cleland,1 an English Army Surgeon in 1744. This method became standard practice.Politzer,2 in 1863, made an important contribution. On the basis of the independent studies of Joseph Toynbee4 and his own he found that the tubal ostium is dilated during the act of swallowing. This action is brought
TSCHIASSNY K. Twin Phonoscope: A Technical Improvement in Ear Auscultation. AMA Arch Otolaryngol. 1959;69(2):227–228. doi:10.1001/archotol.1959.00730030233019
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