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No5-6(3) 2020

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DOI 10.37219/2528-8253-2020-6-58
Kitsera OlOl
Karhart’s notch in ear diseases
Kitsera Ol.Ol.
Lviv national medical university named after Danylo Halytskyi
e-mail: okitsera@gmail.com

Abstract

According to the literature and our research, Karhart’s notch, as a local increase in bone conduction thresholds at frequencies of 500-3000 Hz, is observed not only in otosclerosis, but also in other diseases of the middle ear, especially – with adhesive and secretory otitis. Therefore, it is not appropriate to use the presence of a Karhart’s notch as a pathognomonic sign of otosclerosis. Audiometric diagnostics of non-purulent ear diseases should definitely be supplemented with impedance audiometry.

Keywords

Carhart’s notch, audiogram, otosclerosis, non purulent otitis.


Reference

  1. Altman YA, Tavartkiladze GA. [Audiology guide]. Moscow: DMK Press, 2003. 359 p. [In Russian].
  2. Bluvshtein G. [Essays on Applied Audiology and Hearing-Improving Microsurgery]. 2014. 670 p. [In Russian].
  3. Boyko NV, Kolesnikov VN, Anokhina EA. [Differential diagnosis of otosclerosis]. Russian Medical Journal. 2017;(6):404-8. [Article In Russian].
  4. Elovikov AM, Lilenko SV. [Symptomatology of otosclerosis]. Russian Rhinology. 2012;(2):67-71. [Article in Russian].
  5. Laiko AA, Zabolotny DI, Gorishny AI. [Secretory otitis media]. Kiev: Logos, 2006. 120 p. [In Ukrainian].
  6. Tavartkiladze GA, Gvelesiani TG. [Clinical audiology]. Moscow: Svyatigor Press, 2003. 74 p. [In Russian].
  7. Ahmad I, Pahor AL. Carhart’s notch: a finding in otitis media with effusion. Int J Pediatr Otorhinolaryngol. 2002 Jun 17;64(2):165-70. doi: 10.1016/s0165-5876(02)00080-0.
  8. Kashio A, Ito K, Kakigi A, Karino Sh, Iwasaki Sh, Sakamoto T, et al. Carhart Notch 2-kHz Bone Conduction Threshold Dip A Nondefinitive Predictor of Stapes Fixation in Conductive Hearing Loss With Normal Tympanic Membrane. Arch Otolaryngol Head Neck Surg. 2011 Mar;137(3):236-40. doi: 10.1001/archoto.2011.14.
  9. Carhart R. The clinical application of bone conduction audiometry. Arch Otolaryngol. 1950 Jun;51(6):798-808.
    doi: 10.1001/ archotol.1950.00700020824003.
  10. Kumar M, Maheshwar A, Mahendran S. Could the presence of a Carhart notch predict the presence of glue at myringotomy? Clin Otolaryngol Allied Sci. 2003 Jun;28(3):183-6. doi: 10.1046/j.1365-2273.2003.00682.x.
  11. Emanuel DC. Why Does the Carhart Notch appear at 2000 Hz? Audiology online. 2005. Available from: https://www.audiologyonline.com/ask-the-experts/why-does-carhart-notch-appear-509.
  12. Homma K, Du Y, Shizmu Y, Puria S. Ossicular resonance modes of the human middle ear for bone and air conduction. J Acoust Soc Am. 2009 Feb;125(2):968-79. doi: 10.1121/1.3056564.
  13. Thiagarajan B, Arjunan K. Carhart’s Notch Its Implications. WebMed Central otorhinolaryngology. 2012;3(4), 25 p. Availoable from: https://www.webmedcentral.com/article_view/3273.
 

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