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Modified schema for classifying positive-pressure tympanograms

C G Smith, J L Paradise, T I Young

    Pediatrics
    |March 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    High-positive pressure tympanograms, rare in clinical practice, were analyzed. Most high-positive pressure tympanograms with high compliance indicated normal ears, while those with low compliance suggested potential ear infections or effusions.

    Area of Science:

    • Audiology
    • Pediatric Otolaryngology

    Background:

    • Tympanograms with peaks in the high-positive air pressure range (≥ 50 mm H2O) are uncommon and under-researched.
    • These tympanograms represent a small fraction (1.2%) of clinical recordings in children aged 7 months to 12 years.

    Purpose of the Study:

    • To investigate the otoscopic findings associated with high-positive pressure tympanograms.
    • To correlate tympanometric measurements with otoscopic diagnoses in pediatric subjects.

    Main Methods:

    • Analysis of 65 high-positive pressure tympanograms from a larger dataset of 8,011 tympanograms.
    • Correlation of tympanometric compliance (Madsen units) with otoscopic examination results.
    • Classification of ears as normal, acutely infected, or probable effusion.

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    Main Results:

    • Of 51 high-positive pressure tympanograms with high compliance (≤ 5.5 Madsen units), 90% were associated with normal otoscopic findings.
    • Of 14 high-positive pressure tympanograms with low compliance (> 5.5 Madsen units), 43% were linked to acute infections and 14% to probable effusions.

    Conclusions:

    • High-positive pressure tympanograms with high compliance are generally indicative of normal middle ear function in children.
    • Low compliance in high-positive pressure tympanograms may suggest middle ear pathology, including infection or effusion.
    • Findings support the modification of existing tympanometric classification schemas.