This Article  • References  • Full text PDF  • Reply to article  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Citation map  • Citing articles on HighWire  • Contact me when this article is cited  Related Content  • Similar articles in this journal  Social Bookmarking   What's this?

Alan S. Feldman, PhD

Arch Otolaryngol. 1974;99(3):211-217.

Abstract
Ranges of static impedance in two "normal" middle ear populations are compared. One population (100 ears) showed no audiometric evidence of middle ear abnormality, and tests showed normal function. History and otologic findings also showed a normal middle ear system. The second group (29 ears) also had no audiometric evidence of conductive abnormality, but did have healed perforations of the tympanic membranes.

Ranges for resistive and reactive measurements with a 220-Hz and 660-Hz probe-tone were computed. Healed perforations markedly lowered measured acoustic impedance and strongly suggested that both low and high frequency tympanograms are contaminated by eardrum abnormality. These results account for previously observed but unexplained overlap between some presumably stiff pathological eardrums and normals and restrict use of static acoustic impedance in differential diagnosis of middle ear abnormality to ears with normal tympanic membranes.

Author Affiliations
Syracuse, NY

From the Department of Otorhinolaryngology, Communication Disorder Unit, State University of New York, Upstate Medical Center, Syracuse, NY.

Footnotes
Accepted for publication Dec 1, 1973.

Reprint requests to Department of Otorhinolaryngology, Communication Disorder Unit, State University of New York, Upstate Medical Center, 766 Irving Ave, Syracuse, NY 13210 (Dr. Feldman).

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?

THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

The Effect of Otitis Media in Childhood on the Development of Middle Ear Admittance on Reaching Adulthood
de Beer et al.
Arch Otolaryngol Head Neck Surg 2005;131:777-781.
ABSTRACT | FULL TEXT  

Reassessment of High-Frequency Air-Bone Gaps in Older Adults
Marshall et al.
Arch Otolaryngol Head Neck Surg 1983;109:601-606.
ABSTRACT  

Hearing and Middle Ear Function in Osteogenesis Imperfecta
Shapiro et al.
JAMA 1982;247:2120-2126.
ABSTRACT