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Gunnar Lidén, MD; John L. Peterson, PhD; Göte Björkman

Arch Otolaryngol. 1970;92(3):248-257.

Abstract
Tympanometry is a method for simultaneously evaluating the integrity of the tympanic membrane, the ossicles and their attachments, and the air cushion of the tympanic cavity. Four tympanometric characteristics were compared for 100 normal ears, 36 ears with conductive pathological abnormalities, and 27 ears with sensorineural pathological abnormalities. The mean tympanometric curves revealed similar configurations, showing no statistically significant differences. Examples are presented of tympanograms for patients showing scar tissue on the tympanic membrane, abnormal negative middle ear pressure, a fluid-filled middle ear, disarticulation of the ossicular chain in combination with membrane scarring, fracture of the stapedial crura, and a stapedectomized ear. Observable changes on the shape of the tympanogram occur with a change in probe frequency. Tympanometry offers a sensitive tool with which to assess the functional significance of middle ear pathological abnormality.

Author Affiliations
Gothenburg, Sweden; New Orleans; Gothenburg, Sweden

From the Department of Otolaryngology and Audiology, Sahlgren's Hospital, Gothenburg, Sweden (Dr. Lidén and Mr. Björkman) and the School of Allied Health Professions, Department of Audiology and Speech Pathology, Louisiana State University Medical Center, New Orleans (Dr. Peterson).

Footnotes
Accepted for publication May 14, 1970.

American reprint requests to Louisiana State University Medical Center, 1542 Tulane Ave, New Orleans 70112 (Dr. Peterson). European reprint requests to Department of Otolaryngology and Audiology, Sahlgren's Hospital, Gothenburg, Sweden (Dr. Lidén).

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