Oval Window Size and Shape: a Micro-CT Anatomical Study With Considerations for Stapes Surgery

Zdilla, Matthew J.; Skrzat, Janusz; Kozerska, Magdalena; Leszczyński, Bartosz; Tarasiuk, Jacek; Wroński, Sebastian

doi:10.1097/mao.0000000000001787

Cited by 11 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sound waves vibrate the tympanic membrane which transmits information about the frequency and amplitude of sound through the air-filled middle ear cavity via the tiny ossicles (malleus, incus, and finally to the stapes) [ 33 ]. Amplification of sound pressure is a key feature of the transmission of sound from the middle to inner ear, allowing the stapes push against the higher resistance fluid in the inner ear behind the oval window [ 34 , 35 , 36 ]. As a result of the larger surface area of the tympanic membrane compared to the cochlea’s oval window (a ratio of 20:1), the sound pressure ultimately received by the oval window is approximately 20 times greater than the original sound stimulus [ 37 ].…”

Section: Pathophysiologymentioning

confidence: 99%

Noise-Induced Hearing Loss

Natarajan

Batts

Stanković

2023

JCM

View full text Add to dashboard Cite

Noise-induced hearing loss (NIHL) is the second most common cause of sensorineural hearing loss, after age-related hearing loss, and affects approximately 5% of the world’s population. NIHL is associated with substantial physical, mental, social, and economic impacts at the patient and societal levels. Stress and social isolation in patients’ workplace and personal lives contribute to quality-of-life decrements which may often go undetected. The pathophysiology of NIHL is multifactorial and complex, encompassing genetic and environmental factors with substantial occupational contributions. The diagnosis and screening of NIHL are conducted by reviewing a patient’s history of noise exposure, audiograms, speech-in-noise test results, and measurements of distortion product otoacoustic emissions and auditory brainstem response. Essential aspects of decreasing the burden of NIHL are prevention and early detection, such as implementation of educational and screening programs in routine primary care and specialty clinics. Additionally, current research on the pharmacological treatment of NIHL includes anti-inflammatory, antioxidant, anti-excitatory, and anti-apoptotic agents. Although there have been substantial advances in understanding the pathophysiology of NIHL, there remain low levels of evidence for effective pharmacotherapeutic interventions. Future directions should include personalized prevention and targeted treatment strategies based on a holistic view of an individual’s occupation, genetics, and pathology.

show abstract

Section: Pathophysiologymentioning

confidence: 99%

Noise-Induced Hearing Loss

Natarajan

Batts

Stanković

2023

JCM

View full text Add to dashboard Cite

show abstract

“…To the best of our knowledge, overhanging FN has not been evaluated in images in previous studies. Some scholars have measured the height of oval windows and studied its correlation with the degree of surgical difficulty [ 4 , 10 , 20 ]. Overhanging FN was also described to be one of the main causes leading to oval window niche narrowing; however, there were no overhanging FN measurements.…”

Section: Discussionmentioning

confidence: 99%

An exploratory study of imaging diagnostic clues for overhanging facial nerve in ultra-high-resolution CT

Zhang

Tang

et al. 2023

Eur Arch Otorhinolaryngol

View full text Add to dashboard Cite

Purpose Overhanging facial nerve (FN) may be challenging in imaging diagnosis. The purpose of the study is to investigate the imaging clues for overhanging FN near the oval window on ultra-high-resolution computed tomography (U-HRCT) images. Methods Between October 2020 and August 2021, images of 325 ears (276 patients) were included in the analysis obtained by an experimental U-HRCT scanner. On standard reformatted images, the morphology of FN was evaluated and its position was quantitatively measured using the following indices: protrusion ratio (PR), protruding angle (A), position of FN (P-FN), distance between FN and stapes (D-S), and distance between FN and anterior and posterior crura of stapes (D-AC and D-PC). According to the FN morphology in imaging, images were divided into overhanging FN group and non-overhanging FN group. Binary univariate logistic regression analysis was used to identify the imaging indices independently associated with overhanging FN. Results Overhanging FN was found in 66 ears (20.3%), which manifested as downwards protrusion of either local segment (61 ears, 61/66) or the entire course near the oval window (5 ears, 5/66). D-AC [odds ratio: 0.063, 95% CI 0.012–0.334, P = 0.001) and D-PC (odds ratio: 0.008, 95% CI 0.001–0.050, P = 0.000) were identified as independent predictors of FN overhang (area under the curve: 0.828 and 0.865, respectively). Conclusion Abnormal morphology of the lower margin of FN, D-AC and D-PC on U-HRCT images provide valuable diagnostic clues for FN overhang.

show abstract

“…Landmark analysis was performed with MorphoJ software version 1.06d (Klingenberg, 2011). As part of the morphometric analysis, Procrustes superimposition, aligned by principal axes, was performed (Klingenberg, 2011;Bender-Heine et al, 2017;Zdilla and Fijalkowski, 2017;Zdilla et al, 2018). Principal component analysis (PCA) was performed to assess whole-population variance.…”

Section: Pwvasmentioning

confidence: 99%

Glenoid shape is sexually dimorphic

Zdilla

French

Sowinski

et al. 2023

Proc. W. Va. Acad. Sci.

View full text Add to dashboard Cite

Uniform assessment of the glenoid anatomy is fundamental in establishing uniform standards of care. Subjectivity in classification inherent in the absence of quantification permits deficiency in glenoid assessment methods (e.g., Walch classifications). Therefore, this report aims to objectively quantify the variance of glenoid fossa contours in both sexes via geometric morphometric techniques. A total of 135 glenoid fossae from 135 adult Mexican individuals, who had undergone CT scanning for non-shoulder-related reasons, were randomly selected for this study. Geometric morphometric analysis, including principal component analysis, canonical variate analysis, and two-block partial least squares analysis, was performed on glenoid contours in coronal and axial planes among males and females of varied age groups. The canonical variate analysis of the glenoid revealed sexual dimorphism in both the coronal and axial glenoid contours. Males tend to have a move concave glenoid contour than females, especially in the axial plane. Partial least squares analysis revealed a shape-relationship between coronal and axial contours— when coronal contours are relatively concave, axial contours also exhibit concavity; conversely, when there is minimal concavity in one dimension, there tends to be minimal concavity in the other. This manuscript establishes a novel means of assessing the glenoid cavity through geometric morphometrics; in doing so, the objective and quantifiable methods can be an important supplement to evolving glenoid assessments such as the Walch classification system. The novel approach used in this research revealed sexual dimorphism in the shape of the glenoid cavity as well as a relationship between coronal and axial contours.

show abstract

Oval Window Size and Shape: a Micro-CT Anatomical Study With Considerations for Stapes Surgery

Cited by 11 publications

References 23 publications

Noise-Induced Hearing Loss

Noise-Induced Hearing Loss

An exploratory study of imaging diagnostic clues for overhanging facial nerve in ultra-high-resolution CT

Glenoid shape is sexually dimorphic

Contact Info

Product

Resources

About