Equivalent ear canal volumes in children pre- and post- tympanostomy tube insertion

J. E. Shanks, P. G. Stelmachowicz, K. L. Beauchaine, L. Schulte

    Research output: Contribution to journalArticlepeer-review

    22 Scopus citations


    Pre- and postoperative equivalent ear canal volume measures were obtained from a group of 334 children ranging in age from 6 weeks to 6.7 years. The purpose of the study was to develop volumetric guidelines for the determination of tympanostomy tube patency. For children 4 years and older, almost no ambiguity existed in making this determination accurately. For younger children, the pre- and postoperative distributions overlap. A criterion value of ≥ cm3 as an indicator of a tympanic membrane perforation appears to yield the lowest possible error rate. When both pre- and postoperative measures are available, a difference of ≥ 0.4 cm3 can be used in conjunction with the absolute value to identify a patent tympanostomy tube.

    Original languageEnglish (US)
    Pages (from-to)936-941
    Number of pages6
    JournalJournal of Speech and Hearing Research
    Issue number4
    StatePublished - 1992


    • Acoustic admittance
    • Children
    • Equivalent volume
    • Tympanostomy tubes

    ASJC Scopus subject areas

    • Otorhinolaryngology


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