Longitudinal changes in dynamic characteristics of neonatal external and middle ears

村越, 道生; Kanka, Nattikan; Murakoshi, Michio; Hamanishi, Shinji; RisakoKakuta; Matsutani, Sachiko; Kobayashi, Toshimitsu; Wada, Hiroshi

doi:10.1016/j.ijporl.2020.110061

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Longitudinal changes in dynamic characteristics of neonatal external and middle ears

https://doi.org/10.24517/00058227

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TE-PR-MURAKOSI-110061.pdf (862.8 kB)

Item type

学術雑誌論文 / Journal Article(1)

公開日

2020-06-05

タイトル

Longitudinal changes in dynamic characteristics of neonatal external and middle ears

言語

eng

資源タイプ

資源タイプ識別子

http://purl.org/coar/resource_type/c_6501

資源タイプ

journal article

ID登録

10.24517/00058227

ID登録タイプ

JaLC

著者

Kanka, Nattikan

Murakoshi, Michio

WEKO 86507
e-Rad 70570901

	Murakoshi, Michio

Search repository

Hamanishi, Shinji

RisakoKakuta
Matsutani, Sachiko

Kobayashi, Toshimitsu

Wada, Hiroshi

著者別表示

村越, 道生

提供者所属

内容記述タイプ

Other

内容記述

金沢大学理工研究域フロンティア工学系

書誌情報

International Journal of Pediatric Otorhinolaryngology

巻 134, p. 110061, 発行日 2020-07

ISSN

収録物識別子タイプ

ISSN

収録物識別子

0165-5876

NCID

収録物識別子タイプ

NCID

収録物識別子

AA00234233

DOI

関連識別子

10.1016/j.ijporl.2020.110061

出版者

Elsevier

抄録

内容記述タイプ

Abstract

内容記述

Objectives
Neonates have smaller and less mature ears than adults. Developmental changes in structure and function continually occur after birth and may affect the diagnostic results obtained by audiometric assessment instrumentation, such as tympanometry and otoacoustic emission. In the present study, we investigated longitudinal changes in external and middle ear dynamic characteristics by performing sweep frequency impedance (SFI) tests.
Methods
SFI tests were longitudinally performed on healthy Japanese neonates (1 female and 1 male) from birth to 3 and 5 months, respectively. A sound of sweeping sinusoidal frequency, ranging from 0.1 kHz to 2 kHz, was presented to the ear canal at 50-daPa intervals of static pressure from +200 to −200 daPa. Test results were expressed a curve showing the sound pressure level (SPL) relative to probe tone frequency, called SPL curve.
Results
The first fluctuation in resonance frequency (RF1) and SPL (ΔSPL1), related to the external ear, showed significant developmental changes as chronological age increased; that is, RF1 and ΔSPL1 were respectively increased and decreased and thereafter became unmeasurable by 5 months of age. In contrast, the second fluctuation in resonance frequency (RF2) and SPL (ΔSPL2), related to the middle ear, did not show significant changes over the measurement period.
Conclusions
The present results suggest that the dynamic characteristics of the external ear canal wall changed with increases in chronological age; the resonance of the wall at about 0.3 kHz at birth tended to increase to about 0.7 kHz and to be unmeasurable by 5 months of age, while those of the middle ear did not significantly changed. These results showing how neonatal-ear dynamics changes with chronological age may be an important key in further hearing research and the development of hearing devices and diagnostic tools suitable for neonates.

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Embargo Period 12 months

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出版タイプResource

http://purl.org/coar/version/c_ab4af688f83e57aa

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2023-07-27 15:42:15.688250

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Longitudinal changes in dynamic characteristics of neonatal external and middle ears

× Kanka, Nattikan

× Murakoshi, Michio

× Hamanishi, Shinji

× RisakoKakuta

× Matsutani, Sachiko

× Kobayashi, Toshimitsu

× Wada, Hiroshi

× 村越, 道生

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