Differences in Middle Ear Ventilation Disorders Between Pars Flaccida and Pars Tensa Cholesteatoma in Sonotubometry and Patterns of Tympanic and Mastoid Pneumatization

Shinnabe, Akihiro; Hara, Mariko; Hasegawa, Masayo; Matsuzawa, Shingo; Kanazawa, Hiromi; Kanazawa, Takeharu; Yoshida, Naohiro; Iino, Yukiko

doi:10.1097/mao.0b013e318254fb85

Cited by 16 publications

(8 citation statements)

References 12 publications

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“…Mastoid maturation was measured using temporal bone computed tomography (CT) as described by Iino et al (8,9). The pneumatized area, regardless of the presence or absence of aeration, was measured at the level of the lateral semicircular canal on axial CT using Ziostation version 1.1 software (Ziosoft Inc., Tokyo, Japan).…”

Section: Measurement and Comparison Of The Mastoid Pneumatization Indexmentioning

confidence: 99%

A Comparison of Preoperative Characteristics of Chronic Otitis Media in Down and Non-Down Syndrome

Shinnabe

Yamamoto²,

Hara³

et al. 2014

Otology &Amp; Neurotology

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Section: Measurement and Comparison Of The Mastoid Pneumatization Indexmentioning

confidence: 99%

A Comparison of Preoperative Characteristics of Chronic Otitis Media in Down and Non-Down Syndrome

Shinnabe

Yamamoto²,

Hara³

et al. 2014

Otology &Amp; Neurotology

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“…2,4 Thus, the degree of temporal bone pneumatisation is suggested to be due to the degree of Eustachian tube ventilation. 8 Pneumatisation is further contributed to by the extension of pneumatised mastoid antrum and mastoid air cells to the apex through multiple tracts around the otic capsule. [9][10][11] These tracts have been described as supralabyrinthine, infralabyrinthine, posteromedial, anterior and along the arcuate artery.…”

Section: Introductionmentioning

confidence: 99%

Petrous apex pneumatisation in children: a radiological study

2020

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Objective This study aimed to investigate petrous apex pneumatisation in children, as an understanding of petrous apex pneumatisation is useful in the diagnosis and surgical management of middle-ear disease. Methods Computed tomography head scans from 1700 patients aged 0–16 years were assessed. Petrous apex bone and air cell volumes were calculated to determine the degree of petrous apex pneumatisation. Scans were analysed for communicating tracts between the middle ear and petrous apex. Results Petrous apex pneumatisation was found in 21.0 per cent of patients. Positive relationships were found between age and petrous apex pneumatisation prevalence (rs = 0.990, p < 0.001), and between age and degree of petrous apex pneumatisation (rs = 0.319, p < 0.001). Petrous apex pneumatisation prevalence did not significantly differ by sex or ethnicity. Communicating tracts were identified in 84.3 per cent of patients with petrous apex pneumatisation, most commonly anterior to the otic capsule. Conclusion In children, the prevalence and degree of petrous apex pneumatisation increases with age, but prevalence is not affected by sex or ethnicity.

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“…According to the literature, the development of otitis media and the formation of cholesteatomas may be related to the degree of pneumatization of the temporal bone. However, it is not known whether poor pneumatization is the cause or the result of otitis media [ 1 2 ].…”

Section: Introductionmentioning

confidence: 99%

Anatomical Factors Influencing Pneumatization of the Petrous Apex

Lee

Kim

Lee

et al. 2015

Clin Exp Otorhinolaryngol

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ObjectivesAim of the present study was to define the relationship between petrous apex pneumatization and the nearby major anatomical landmarks using temporal bone computed tomography (CT) images.MethodsThis retrospective, Institutional Review Board-approved study analyzed CT images of 84 patients that showed normal findings bilaterally. Pneumatization of the petrous apex was classified using two methods. Eight parameters were as follows: angle between the posterior cranial fossa and internal auditory canal, Morimitsu classification of anterior epitympanic space, distance between the carotid canal and jugular bulb, distance between the cochlear modiolus and carotid canal, distance between the tympanic segment and jugular bulb, high jugular bulb, distance between the vertical segment and jugular bulb, and distance between the lateral semicircular canals and middle cranial fossa.ResultsThere was a significant difference in Morimitsu classification of the anterior epitympanic space between the two classification methods. Poorly pneumatic upper petrous apices were distributed uniformly in three types of Morimitsu classification, but more pneumatic upper petrous apices were found more often in anterior type. Lower petrous apex was well pneumatized regardless of the types of anterior epitympanic space, but the largest amount of pneumatization was found more frequently in the anterior type of anterior epitympanic space.ConclusionThis study showed that there was no reliable anatomic marker to estimate petrous apex pneumatization and suggests that the pneumatization of the petrous apex may be an independent process from other part of the temporal bone, and may not be influenced by the nearby major anatomical structures in the temporal bone. In this study, the anterior type of anterior epitympanic space was found to be closely related to more well-pneumatized petrous apices, which implies that the anterior saccule of the saccus medius may be the main factor influencing pneumatization of the petrous apex.

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Differences in Middle Ear Ventilation Disorders Between Pars Flaccida and Pars Tensa Cholesteatoma in Sonotubometry and Patterns of Tympanic and Mastoid Pneumatization

Abstract: Significantly different tubal function and mastoid pneumatization patterns suggest differences in ventilation disorders and cause between ears with pars flaccida and pars tensa cholesteatoma.

Cited by 16 publications

References 12 publications

A Comparison of Preoperative Characteristics of Chronic Otitis Media in Down and Non-Down Syndrome

A Comparison of Preoperative Characteristics of Chronic Otitis Media in Down and Non-Down Syndrome

Petrous apex pneumatisation in children: a radiological study

Anatomical Factors Influencing Pneumatization of the Petrous Apex

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