The intricate interrelationship of cochlear aperture and internal auditory canal diameter in pediatric normal petrous structures

IF 1.2 4区医学 Q3 OTORHINOLARYNGOLOGY International journal of pediatric otorhinolaryngology Pub Date : 2025-03-05 DOI:10.1016/j.ijporl.2025.112296

Diksha Kumari , Richi Sinha , Umakant Prasad , Rakesh Kumar Singh

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Abstract

Purpose

The cochlear aperture and internal auditory canal dimensions play a pivotal role in cochlear nerve health, yet their normative data exhibit significant variability. This study seeks to establish definitive normative ranges for these dimensions and investigate their interrelationship in the context of normally developed pediatric temporal bones.

Methods

This prospective study included seventy-eight children under fifteen years, diagnosed with bilateral severe-to-profound sensorineural hearing loss and free from temporal bone deformities. Utilizing high-resolution computed tomography scans, we measured the diameters of the cochlear aperture at the mid-modiolar level and the internal auditory canal at the porus, midsection, and fundus. The associations between these dimensions were analyzed using Spearman's rank correlation and linear regression.

Results

The mean cochlear aperture diameter was 2.16 mm, while the internal auditory canal diameters at the porus, midsection, and fundus were 6.60 mm, 4.27 mm, and 3.88 mm, respectively. Significant positive correlations were observed between the cochlear aperture and internal auditory canal diameters at the midsection (rs = 0.246, p = 0.029) and fundus (rs = 0.338, p = 0.002), as well as the average internal auditory canal diameter (rs = 0.233, p = 0.039). Regression analysis indicated that the internal auditory canal diameter at the fundus explained 17.5 % of the variance in cochlear aperture diameter (β = 0.179, p < 0.001).

Conclusion

This study established normative ranges for cochlear aperture and internal auditory canal dimensions in children, addressing past variability. These findings support cochlear implant planning, with a regression model offering a noninvasive tool to estimate cochlear aperture size. We also identified a unique, significant correlation between the two, highlighting a shared developmental pathway.

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目的耳蜗孔径和内听道尺寸在耳蜗神经健康中起着关键作用，但它们的标准数据却表现出很大的差异性。本研究旨在为这些尺寸建立明确的标准范围，并在小儿颞骨正常发育的背景下研究它们之间的相互关系。方法本前瞻性研究纳入了 78 名 15 岁以下的儿童，这些儿童被诊断为双侧重度至永久性感音神经性听力损失，且无颞骨畸形。利用高分辨率计算机断层扫描，我们测量了耳蜗孔在小耳中段的直径，以及内听道在孔部、中段和底部的直径。结果耳蜗孔的平均直径为 2.16 毫米，而内耳道在耳孔、中段和耳底的直径分别为 6.60 毫米、4.27 毫米和 3.88 毫米。耳蜗孔径与中段内耳道直径（rs = 0.246，p = 0.029）和耳底内耳道直径（rs = 0.338，p = 0.002）以及平均内耳道直径（rs = 0.233，p = 0.039）之间呈显著正相关。回归分析表明，耳底内听道直径可解释耳蜗孔径变异的 17.5% (β = 0.179, p < 0.001)。这些发现为人工耳蜗植入规划提供了支持，回归模型是估算人工耳蜗孔径大小的无创工具。我们还发现两者之间存在独特的显著相关性，突出了共同的发育途径。

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.