Endoscopic evaluation of middle ear anatomic variations in autopsy series: analyses of 204 ears

Şahin, Bayram; Orhan, Kadir Serkan; Aslıyüksek, Hızır; Kara, Erdoğan; Büyük, Yalçın; Güldíken, Yahya

doi:10.1016/j.bjorl.2018.10.002

Cited by 7 publications

(12 citation statements)

References 33 publications

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“…The anatomical findings of the present study are in agreement with others already published in the literature. Sahin et al 1 found a prominent anterior wall in the EAM in 26.4% of the specimens (27/204), compared with 20.8% of the specimens in the present study. A prominent anterior wall in the EAM hampers visualization of the tympanic membrane, both during routine otoscopy and during otologic surgery, and is particularly limiting in binocular microscopy.…”

Section: Discussioncontrasting

confidence: 66%

“…Of these, the integrity of the facial canal is of particular interest, since dehiscence or protrusion increases the risk of a facial nerve lesion. Sahin et al 1 reported an incidence of dehiscence and of protrusion of the facial canal in 15.6% (32/204) and in 4.4% (9/204) of the specimens, respectively. In the present study, these frequencies were of 33.3 and 15.5%, respectively.…”

Section: Discussionmentioning

confidence: 97%

“…In agreement with the findings of these authors, in the present study a complete subiculum (type A) was detected in all the specimens examined. Sahin et al 1 reported frequencies of 66.7% (136/204), 10.3% (21/204) and 23% (47/204), respectively, for subiculum types A, B and C. The finiculus and the subiculum form the lower and upper boundaries of the round window, respectively. In all cases, the presence of the complete structure (type A) favors its identification and anatomical reference.…”

Section: Discussionmentioning

confidence: 99%

“…Transcanal endoscopic ear surgery has resulted in increased knowledge on the anatomy of the ear, particularly regarding areas that are less accessible under binocular microscopy. 1 Nevertheless, the endoscopic anatomy of areas of the ME such as the round window needs to be characterized in greater detail in view of the increasing interest in accessing the inner ear and the lateral base of the skull. 2 …”

Section: Introductionmentioning

confidence: 99%

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The Endoscopic Anatomy of the External Acoustic Meatus and of the Middle Ear in Dry Temporal Bones: A Study Conducted Using Digital and Mobile Device Technology

Gaspar-Sobrinho

Trzan

Uzeda

et al. 2022

Int Arch Otorhinolaryngol

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Introduction The endoscopic anatomy of the middle ear (ME) and of the external acoustic meatus (EAM) has been described in cadavers, in fresh temporal bones, or in vivo using conventional video recording, but not in dry bones or using an alternative inspection and recording technique. Objective To study the anatomy of the ME and of the EAM in dry temporal bones using a smartphone-endoscope system. Methods The EAM and the ME were studied in dry temporal bones using an endoscopic transcanal approach with a telescope connected to a smartphone (M-scope mobile endoscope app and adaptador, GBEF Telefonia, São Paulo, SP, Brazil). Results Out of 50 specimens, 2 had exostosis of the EAM and 3 contained remains of the tympanic membrane. The anterior wall of the EAM was prominent in 10/48 specimens (20.8%). Ossicles were seen in 13/45 (28.8%), stapes at the oval window were seen in 12/45 (26.6%), and the incus was seen in 1/45 (2.2%) specimens. The facial canal was open and protruding in 15/45 (33.3%) and in 7/45 (15.5%) specimens, respectively. Of the 45 MEs evaluated, type A was predominant for finiculus (93.3%), subiculum (100%), and ponticulus (95.6%). The rest were type B. None was classified as type C. According to its position in relation to the round window, the fustis was classified into type A (68.9%) or B (31.1%). The pyramidal eminence, the bony portion of the Eustachian tube, the semicanal of the tensor tympani muscle, and the cochleariform process were visualized completely or partially in all cases. Conclusion The use of a smartphone-based endoscopic transcanal procedure in dry temporal bones allowed the evaluation of anatomical variations in the EAM and in the ME.

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Section: Discussioncontrasting

confidence: 66%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Endoscopic Anatomy of the External Acoustic Meatus and of the Middle Ear in Dry Temporal Bones: A Study Conducted Using Digital and Mobile Device Technology

Gaspar-Sobrinho

Trzan

Uzeda

et al. 2022

Int Arch Otorhinolaryngol

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“…The hypotympanum also was studied with classification of the jugular bulb height in the middle ear [31]. The knowledge of detailed endoscopic anatomy of these spaces is important for EES [32]. In addition, the presence of the bony crests, bridges, and sinuses in the middle ear affect greatly the disease spread and the surgical procedures [33] (Fig.…”

Section: Role Of Ees In Endoscopic Anatomy and Physiology Of Middle Earmentioning

confidence: 99%

Endoscopic ear surgery: then and now, review article

Moneir

Elkahwagi

2022

Egypt J Otolaryngol

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Objective Endoscopic ear surgery (EES) is a growing and well-recognized field in the modern era. EES had a stepwise journey of development. This journey is pretty comparable to the endoscopic sinus surgery development. Methods Online literature search was performed to give a concise review on the development and recent applications of EES and in addition to clarify the reported advantages and disadvantages of EES. Results EES has a more recent application than ESS that started decades after endoscopic sinus surgery (ESS). The use of endoscope in ear surgery gives a wide-angled detailed view of the middle ear structures. It gives the ability to look around the corners offering less disease persistence than the microscopic approaches. EES is useful in cases of narrow and angled external auditory canal as it bypasses the narrowest segment of EAC. However, it lacks the 3D perception and enables one hand surgery which could be difficult to manage bleeding. Applications of EES extended from tympanoplasty, stapedotomy, cholesteatoma surgery, and middle ear ventilation in chronic inflammatory conditions to the neurotologic applications in lateral skull base surgery. Conclusion EES is an extremely growing field with many applications in otology and neurotology. The advantages of endoscopic applications outweigh the disadvantages. It has a stepwise learning curve and offer better teaching ability.

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Juvenile Nasopharyngeal Angiofibroma in Adolescent Female with Subsequent ICA Canal Dehiscence: An Unknown Entity

Sikdar

Khan

Nivsarkar

et al. 2022

Indian J Otolaryngol Head Neck Surg

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Endoscopic evaluation of middle ear anatomic variations in autopsy series: analyses of 204 ears

Cited by 7 publications

References 33 publications

The Endoscopic Anatomy of the External Acoustic Meatus and of the Middle Ear in Dry Temporal Bones: A Study Conducted Using Digital and Mobile Device Technology

The Endoscopic Anatomy of the External Acoustic Meatus and of the Middle Ear in Dry Temporal Bones: A Study Conducted Using Digital and Mobile Device Technology

Endoscopic ear surgery: then and now, review article

Juvenile Nasopharyngeal Angiofibroma in Adolescent Female with Subsequent ICA Canal Dehiscence: An Unknown Entity

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