Multi-component and multi-frequency tympanometry: a comparison between cochlear implanted ear and non-implanted ear

IF 1.3 4区医学 Q3 OTORHINOLARYNGOLOGY

International journal of pediatric otorhinolaryngology Pub Date : 2025-08-26 DOI:10.1016/j.ijporl.2025.112537

Palani Saravanan , Megha , Pooja Venkatesh

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引用次数: 0

Abstract

Objectives

Cochlear implant (CI) surgery may alter middle ear structure and function, potentially affecting the measurement of the electrically evoked stapedius reflex threshold (eSRT). This study aimed to investigate such alterations using multi-component and multi-frequency tympanometry. Specific objectives were to compare tympanometric findings, multi-component tympanogram patterns, and frequency-dependent changes in admittance (ΔY), susceptance (ΔB), conductance (ΔG), and phase angle (Δθ) between implanted and contralateral non-implanted ears.

Methods

Twenty-two paediatric participants with unilateral CI (Cochlear Nucleus CI422 with CP802 processor), aged 3.5–7 years, were included. Tympanometric assessments were performed using probe tones of 226 Hz, 678 Hz, and 1000 Hz to record admittance, susceptance, and conductance. Multi-component tympanograms were classified according to the Vanhuyse model. Multi-frequency tympanometry was conducted using the sweep-frequency method (250–2000 Hz, in 50 Hz steps). Parameters ΔY, ΔB, ΔG, and Δθ across frequencies were compared between implanted and non-implanted ears.

Results

The implanted ears showed significant reductions in static admittance and elevations in resonant frequency compared to non-implanted ears (p < 0.05). At 1000 Hz, 5 of 22 implanted ears (22.7 %) demonstrated the 3B1G pattern, compared with 11 of 22 (50 %) non-implanted ears. Frequency-dependent decreases in ΔY, ΔB, ΔG, and Δθ were also significant in implanted ears (p < 0.05).

Conclusion

CI surgery is associated with frequency-dependent changes in the implanted ear, indicating altered mechano-acoustical properties of the middle ear and increased stiffness. These changes may influence clinical procedures, particularly eSRT measurement.

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多分量多频鼓室测量：人工耳蜗与非人工耳蜗的比较

目的人工耳蜗（CI）手术可能改变中耳结构和功能，影响电诱发镫骨反射阈值（eSRT）的测量。本研究旨在利用多分量和多频率鼓室测量法来研究这种改变。具体目的是比较植入耳和对侧非植入耳的鼓室测量结果、多分量鼓室图模式以及导纳（ΔY）、电纳（ΔB）、电导（ΔG）和相角（Δθ）的频率依赖性变化。方法选取22例患有单侧CI（耳蜗核CI422伴CP802处理器）的儿童，年龄3.5 ~ 7岁。使用226 Hz、678 Hz和1000 Hz的探测音调进行鼓室测量，记录导纳、电纳和电导。根据Vanhuyse模型对多分量鼓室图进行分类。采用扫频法（250-2000 Hz， 50 Hz步长）进行多频测音。各频率参数ΔY， ΔB， ΔG和Δθ在植入和未植入耳之间进行比较。结果与未植入耳相比，植入耳的静导纳显著降低，共振频率显著升高（p < 0.05）。在1000 Hz时，22只植入耳中有5只（22.7%）表现出3B1G模式，而22只未植入耳中有11只（50%）表现出3B1G模式。植耳中ΔY、ΔB、ΔG和Δθ的频率依赖性降低也很显著（p < 0.05）。结论ci手术与植入耳的频率依赖性改变有关，表明中耳力学声学特性改变和刚度增加。这些变化可能影响临床程序，特别是eSRT测量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International journal of pediatric otorhinolaryngology 医学-耳鼻喉科学

CiteScore

3.20

自引率

6.70%

发文量

276

审稿时长

62 days

期刊介绍： The purpose of the International Journal of Pediatric Otorhinolaryngology is to concentrate and disseminate information concerning prevention, cure and care of otorhinolaryngological disorders in infants and children due to developmental, degenerative, infectious, neoplastic, traumatic, social, psychiatric and economic causes. The Journal provides a medium for clinical and basic contributions in all of the areas of pediatric otorhinolaryngology. This includes medical and surgical otology, bronchoesophagology, laryngology, rhinology, diseases of the head and neck, and disorders of communication, including voice, speech and language disorders.