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September 1969

Auditory Tube Patency After Injection of Teflon Paste: An Investigation in Dogs

Author Affiliations

Rochester, Minn
From the Mayo Clinic and Mayo Foundation, Section of Otolaryngology and Rhinology (Dr. Pulec), and Mayo Graduate School of Medicine (University of Minnesota), Rochester, Resident in Otolaryngology and Rhinology (Dr. Brookler).

Arch Otolaryngol. 1969;90(3):296-300. doi:10.1001/archotol.1969.00770030298009

THE CLINICAL entity of the abnormally patent auditory tube has been known since 1858.1 Attempts to treat this condition have included insufflation of solutions and powders2 and surgical measures,3 which proved to be unsatisfactory. Because a treatment is needed for this often distressing condition, one of us (J.L.P.) thought that a reliable and permanent cure might be produced by the peritubal injection of polytetrafluoroethylene (Teflon) prepared as a paste in glycerin, 50% by weight.

Methods  Eight mongrel dogs representing both sexes and weighing from 28 to 40 lb were used. Room air at a constant flow, as monitored by a flowmeter, was introduced into the airtight, sealed external canal and middle ear space through a generous myringotomy.The airtight seal of the external auditory canal was obtained by first threading a 12-F Foley catheter through a machined nylon cone which was permanently attached to a swivel on

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