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MeSH Review

Acoustic Impedance Tests

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Disease relevance of Acoustic Impedance Tests


Psychiatry related information on Acoustic Impedance Tests


High impact information on Acoustic Impedance Tests

  • Middle ear analysis by tympanometry and acoustic reflex analysis indicates that, although some patients with OI have a still middle ear system similar to that seen in otosclerosis, the majority display absent acoustic reflexes and increased compliance of the middle ear with notched tympanograms suggestive of anomalous ossicular articulation [4].
  • A measurement protocol that includes tympanometry, distortion product otoacoustic emission measurements and high-frequency VRA is recommended for young children receiving carboplatin or other ototoxic drugs [5].
  • If TEOEs are absent, impedance audiometry, ABR recordings, and audiometric evaluation techniques are needed to distinguish between conductive and sensorineural hearing loss and to assess hearing thresholds precisely [6].
  • METHODS--The stapedial reflex was examined using impedance audiometry in 38 patients with sporadic ALS and in 25 age matched controls [7].
  • PATIENTS: From a pool of 1450 children (aged 1-10 years) with SOM, defined by tympanometry as having type B or C2 tympanograms, 429 with SOM of at least 3 months' duration were included in the trial [8].

Biological context of Acoustic Impedance Tests

  • After a questionnaire and an ear examination, the following tests were performed: air-conduction pure-tone audiometry in the frequency range of 125-16 kHz, tympanometry, speech recognition score in quiet conditions, transient evoked otoacoustic emissions (TEOAE) and cognitive cortical evoked potentials (MMN, P300, N400) [9].

Associations of Acoustic Impedance Tests with chemical compounds

  • The inclusion criterion was a type C2 and type B tympanometry result of at least three months' duration [10].
  • Tympanometry revealed middle-ear pressure abnormalities (less than -50 or greater than 20 mm H2O) in at least one ear during 18% of observations in recipients of recombinant interferon beta serine compared with 38% of observations in placebo recipients [11].
  • Significant deterioration in both PTA thresholds and TEOAE energy levels (with no change in tympanometry) were detected in the cisplatin group [12].
  • Impedance audiometry was carried out under a general anesthetic (ketamine and nitrous oxide) in 60%, and without anesthesia in 40% of the cases [13].
  • A randomized trial of nasal beclomethasone for 8 weeks was conducted in children with abnormal tympanometry to identify the effect of therapy upon nasal cytology [14].

Gene context of Acoustic Impedance Tests

  • METHODS: Hearing in patients with RA and controls was examined using pure-tone audiometry and tympanometry [15].
  • Tubal opening results of this method were compared to the traditional method using preinflation and postinflation tympanometry [16].
  • Numerical overestimation of P(m) by tympanometry was explained by hysteresis, which reflected the viscoelastic properties of the MES [17].
  • The Physical Volume Test in impedance audiometry [18].
  • Clinical assessment of the MHA in normal living ears, within the range 30 degrees to 75 degrees, correlates poorly with MEP measured by impedance tympanometry, within the range of -300 to +160 mm H2O [19].

Analytical, diagnostic and therapeutic context of Acoustic Impedance Tests

  • The first group received azithromycin at a dose of 10 mg/kg once daily for 3 days and this regimen was repeated weekly for up to 12 weeks according to the results of tympanometry and pneumatic otoscopy [20].
  • Although all except one of the seven patients with suspected tubal dysfunction showed normal results with catheter insufflation and tympanometry, six of the seven showed abnormality and one reported the disappearance of ear stuffiness after the ventilation capacity test [21].


  1. Atopy in children with otitis media with effusion. Caffarelli, C., Savini, E., Giordano, S., Gianlupi, G., Cavagni, G. Clin. Exp. Allergy (1998) [Pubmed]
  2. Efficacy and tolerability of brodimoprim in bacterial otitis media in children. Controlled study versus cefaclor. Galetti, G., Martini, A., Bergamini, G., Dallari, S., Ghidini, A., Mazzoli, M., Cantini, L., Monici Preti, P.A. Journal of chemotherapy (Florence, Italy) (1993) [Pubmed]
  3. Evaluation of TEOAE and DPOAE measurements for the assessment of auditory thresholds in sensorineural hearing loss. Suckfüll, M., Schneeweiss, S., Dreher, A., Schorn, K. Acta Otolaryngol. (1996) [Pubmed]
  4. Hearing and middle ear function in osteogenesis imperfecta. Shapiro, J.R., Pikus, A., Weiss, G., Rowe, D.W. JAMA (1982) [Pubmed]
  5. Assessment of hearing in very young children receiving carboplatin for retinoblastoma. Smits, C., Swen, S.J., Theo Goverts, S., Moll, A.C., Imhof, S.M., Schouten-van Meeteren, A.Y. Eur. J. Cancer (2006) [Pubmed]
  6. Hearing impairment in infants after meningitis: detection by transient evoked otoacoustic emissions. François, M., Laccourreye, L., Huy, E.T., Narcy, P. J. Pediatr. (1997) [Pubmed]
  7. Stapedial reflex in amyotrophic lateral sclerosis. Shimizu, T., Hayashida, T., Hayashi, H., Kato, S., Tanabe, H. J. Neurol. Neurosurg. Psychiatr. (1996) [Pubmed]
  8. Antibiotic treatment of children with secretory otitis media. Amoxicillin-clavulanate is superior to penicillin V in a double-blind randomized study. Thomsen, J., Sederberg-Olsen, J., Balle, V., Hartzen, S. Arch. Otolaryngol. Head Neck Surg. (1997) [Pubmed]
  9. Hearing in the elderly: a test protocol and preliminary results. Laukli, E., Molde, B., Solem, B.S., Stenklev, N.C. Scandinavian audiology. Supplementum. (2001) [Pubmed]
  10. Antibiotic treatment of children with secretory otitis media. A randomized, double-blind, placebo-controlled study. Thomsen, J., Sederberg-Olsen, J., Balle, V., Vejlsgaard, R., Stangerup, S.E., Bondesson, G. Arch. Otolaryngol. Head Neck Surg. (1989) [Pubmed]
  11. Otologic effects of interferon beta serine in experimental rhinovirus colds. Sperber, S.J., Doyle, W.J., McBride, T.P., Sorrentino, J.V., Riker, D.K., Hayden, F.G. Arch. Otolaryngol. Head Neck Surg. (1992) [Pubmed]
  12. Use of transient evoked otoacoustic emissions to detect and monitor cochlear damage caused by platinum-containing drugs. Yardley, M.P., Davies, C.M., Stevens, J.C. British journal of audiology. (1998) [Pubmed]
  13. Acoustic reflex as a predictor of middle ear effusion. Freyss, G.E., Narcy, P.P., Manac'h, Y., Toupet, M.G. The Annals of otology, rhinology & laryngology. Supplement. (1980) [Pubmed]
  14. Nasal inflammation and chronic ear disease in Australian Aboriginal children. Gibson, P.G., Stuart, J.E., Wlodarczyk, J., Olson, L.G., Hensley, M.J. Journal of paediatrics and child health. (1996) [Pubmed]
  15. Ear involvement in patients with rheumatoid arthritis. Takatsu, M., Higaki, M., Kinoshita, H., Mizushima, Y., Koizuka, I. Otol. Neurotol. (2005) [Pubmed]
  16. Autoinflation of eustachian tube in young children. Chan, K.H., Cantekin, E.I., Karnavas, W.J., Bluestone, C.D. Laryngoscope (1987) [Pubmed]
  17. Middle ear volume and pressure effects on tympanometric middle ear pressure determination: model experiments with special reference to secretory otitis media. Gaihede, M. Auris, nasus, larynx. (2000) [Pubmed]
  18. The Physical Volume Test in impedance audiometry. Rock, E.H. Ear, nose, & throat journal. (1991) [Pubmed]
  19. Tympanic membrane retraction and middle-ear pressure. Cable, H.R., Tadros, S. The Journal of laryngology and otology. (1982) [Pubmed]
  20. A comparative study of azithromycin and pseudoephedrine hydrochloride for otitis media with effusion in children. Safak, M.A., Kiliç, R., Haberal, I., Göçmen, H., Ozeri, C. Acta Otolaryngol. (2001) [Pubmed]
  21. A ventilation capacity test for the Eustachian tube using a soundproof pressure chamber. Kodama, A., Kitahara, M., Ozawa, H., Izukura, H. Acta oto-laryngologica. Supplementum. (1994) [Pubmed]
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