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Original Article
September 1977

Validity of Tympanometry for Middle Ear Effusions

Author Affiliations

From the Department of Otolaryngology and Head and Neck Surgery, Hull Royal Infirmary, Hull, Great Britain.

Arch Otolaryngol. 1977;103(9):505-513. doi:10.1001/archotol.1977.00780260035001

• The findings on paracentesis and aspiration of the middle ear were compared with preoperative tympanometry. From the results obtained, it was found that if tympanometry alone is used to determine the presence or absence of fluid the best discriminant is a compliance of 0.21 or a gradient of 0.04 equivalent volume units. The average failure rate with either of these criteria is 20%. A numerical estimate of the validity of tympanometry may be made for individual cases.

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