Journal of Clinical Otolaryngology Head and Neck Surgery

The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery

J Clin Otolaryngol Head Neck Surg 2018; 29(2):235-239

pISSN: 1225-0244, eISSN: 2713-833X

DOI: https://doi.org/10.35420/jcohns.2018.29.2.235

증례

외이도-유양동-귀뒤바퀴피부 누공환자에서 수술 전, 후의 외이도 공명의 변화

김상준¹, 강명구¹^,^*, 정성욱¹, 이동근¹

The Changes of External Ear Resonance after Surgery for Repair of the Postauricular Meato-Mastoid Cutaneous Fistula

Sangjun Kim¹, Myung Koo Kang¹^,^*, Dong Kun Lee¹, Sung Wook Jeong¹

¹동아대학교 의과대학 이비인후-두경부외과학교실

¹Department of Otorlaryngology-Head and Neck Surgery, Dong-A University College of Medicine, Busan, Korea

^*교신저자: 강명구, 49201 부산광역시 서구 대신공원로 26 동아대학교 의과대학 이비인후-두경부외과학교실 전화 :(051) 240-5428·전송 :(051) 253-0712 E-mail: mgkang@dau.ac.kr

© Copyright 2018 The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Aug 03, 2018; Revised: Sep 27, 2018; Accepted: Nov 06, 2018

Published Online: May 31, 2020

ABSTRACT

Due to the structure with one end closed, the external ear resonance effect in which the high frequency is amplified can be generated, and the sound can be perceived well. The external ear resonance normally has a first peak and a second peak. On average, the first peak has a gain of 18.6 dB at 2620 Hz and the second peak has a gain of 18.2 dB at 4210 Hz. The resonance of the external auditory canal changes with the state of the tympanic membrane, the presence of the ventilation tube, and the structure (length, diameter, shape) of the external auditory canal. A patient with a postauricular meatomastoid cutaneous fistula was admitted to the hospital with a foreign body which is the molding of the hearing aid. After removal of the foreign body, the resonance of the external auditory canal was lost and the subjective sound cognitive ability decreased. In the case of postauricular meatomastoid cutaneous fistula, we confirmed the improvement of sound cognitive ability, the change of pure tone hearing threshold, and the change of the external ear resonance after reconstruction of the ear canal without middle ear reconstruction. (J Clinical Otolaryngol 2018;29:235-239)

Keywords: 외이도 공명; 외이도-유양동-귀뒤바퀴 피부 누공

Keywords: External ear resonance; Canaloplasty; Cutaneous fistula