Anatomic features of the fetal round and oval windows, and their relations with the tympanic nerve

Beğer, Orhan; Vayısoğlu, Yusuf; Güven, Onurhan; Adanır, Saliha Seda; Taghipour, Pourya; Çakır, Salim; Dağtekin, Oykut; Talaş, Derya Ümit

doi:10.1007/s00276-020-02672-8

Cited by 2 publications

(11 citation statements)

References 52 publications

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“…Considering the study of Beger et al 15 we classified the distance between TN and RWN as 4 types. The distance between 0 and 1 mm was defined as type 1, between 1 and 2 mm as type 2, between 2 and 3 mm as type 3, and between 3 and 4 mm as type 4.…”

Section: Resultsmentioning

confidence: 99%

“…The literature available for TN-RWN distance was limited to 2 works. 14 , 15 In the study by Todd 14 focused on 82 adult temporal bones, TN-RWN was measured as 2.10 mm (range: 0-3.20 mm). The other measurement was reported in the study by Beger et al 15 (mean: 1.21 ± 0.60 mm, range: 0-2.13 mm) conducted on 30 temporal bones of 15 fetuses between the ages of 19 and 30 weeks of gestation.…”

Section: Discussionmentioning

confidence: 99%

“…For this purpose, the photographs were posted to ImageJ. According to previous studies, 14 , 15 the measured parameters were as follows: (a) TN-RWN: the shortest distance between TN and RWN and (b) TN-OW: the shortest distance between TN and OW ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

“… 13 , 14 This distance was measured in only 2 cadaveric studies; 1 of them was an adult, 14 and the other was a fetal investigation. 15 On the other hand, oval window (OW)-related interventions (e.g., stapes surgery) may lead to involuntary damage of TN. 15 As far as we know, TN-OW distance was not measured in any adult populations.…”

Section: Introductionmentioning

confidence: 99%

“… 15 On the other hand, oval window (OW)-related interventions (e.g., stapes surgery) may lead to involuntary damage of TN. 15 As far as we know, TN-OW distance was not measured in any adult populations. Hence, we think that a novel adult morphometric examination focused on the location of TN relative to RWN and OW may be handy for ear surgeons to approach the windows during stapes surgery or cochlear implantation.…”

Section: Introductionmentioning

confidence: 99%

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Location of the Tympanic Nerve Relative to the Round and Oval Windows

Beğer¹,

Güven²,

Dogu³

et al. 2023

Int Adv Otol

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Background: The aim of the study was to measure the distance of the tympanic nerve to the oval window and round window niche in adult cadavers for evaluating its usability as an anatomical landmark during middle ear-related surgeries, including stapedotomy and cochleostomy, and for preventing its iatrogenic damage during surgical practices such as otosclerosis surgery and cochlear implantation. Methods: The middle ears of 10 adult cadavers aged 74.70 ± 14.56 years were bilaterally dissected with the help of an endoscope and microscope to measure the distance of tympanic nerve to round window niche and oval window. Results: Tympanic nerve was found as 1.60 ± 0.86 mm (range, 0-3.11 mm) and 1.55 ± 0.38 mm (range, 1.04-2.20 mm) away from round window niche and oval window, respectively. In relation to the quantitative values of these 2 distances, neither right–left nor male–female significant differences were determined ( P > .05). Tympanic nerve was observed in all temporal bones. In terms of the shape and twigs of tympanic nerve, extreme variations among cadaveric temporal bones were determined. Tympanic nerve-round window niche distance between 0-1 mm was defined as type 1 (20%), between 1 and 2 mm as type 2 (45%), between 2 and 3 mm as type 3 (30%), and between 3 and 4 mm as type 4 (5%). Conclusion: Tympanic nerve may be vulnerable at round window niche- or oval window-related surgeries (e.g., cochleostomy).

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Section: Resultsmentioning

confidence: 99%