scholarly journals Evaluation and Management of Aural Atresia; Review Article

2021 ◽  
pp. 348-354
Author(s):  
Ahmed Osman Abdullah ◽  
Abrar Ali Aldhameen ◽  
Razan Mohammed Almutairi ◽  
Nada Abdullah Asiri ◽  
Abdulaziz amer Alshehri ◽  
...  
Keyword(s):  
Treatment Options ◽  
Gunshot Wounds ◽  
Review Article ◽  
External Ear ◽  
Ear Canal ◽  
Common Cause ◽  
Aural Atresia ◽  
Otologic Surgery ◽  
Car Accidents ◽  
Hearing Devices

The absence of a patent ear canal, which can be acquired or congenital, is known as Aural Atresia. The most common cause of acquired Aural Atresia is an inflammatory response to trauma or otologic surgery. Although rare, acquired Aural Atresia is most commonly found after external ear trauma, such as car accidents, gunshot wounds, or recent otologic surgery. The main treatment of Aural Atresia is surgical, also the invention of bone anchored hearing devices provide greater alternative solution, each methods has its advantages of disadvantages, we hope In the future of developing more effective treatment options.

scholarly journals Current Treatments for Congenital Aural Atresia

2020 ◽  
Vol 24 (4) ◽  
pp. 161-166
Author(s):  
Min Young Lee ◽  
Yang-Sun Cho ◽  
Gyu Cheol Han ◽  
Jeong-Hoon Oh
Keyword(s):  
Preoperative Evaluation ◽  
Bone Conduction ◽  
External Ear ◽  
Ear Canal ◽  
Operative Techniques ◽  
Aural Atresia ◽  
Meatal Stenosis ◽  
External Ear Canal ◽  
Congenital Aural Atresia ◽  
Better Than

Congenital aural atresia is an ear malformation evident at birth, involving various degrees of failed external ear canal development. A true external ear canal is desirable, as devices that replace the canal are inconvenient and expensive. Therefore, an optimal surgical technique is required. Here, we review useful preoperative and operative techniques. Surgical correction is often not the preferred treatment; the hearing outcome is no better than the outcomes afforded by bone-conduction devices, and surgery may be associated with recurrence or complications such as meatal stenosis. Preoperative evaluation and appropriate management are important. Several means of preventing meatal stenosis are discussed in this review.

Finite Element Modeling of Sound Transmission Based on Micro-Computer Tomography for Human Ear

2013 ◽  
Vol 419 ◽  
pp. 593-601
Author(s):  
Jia Bin Tian ◽  
Na Ta ◽  
Zhu Shi Rao ◽  
Li Fu Xu ◽  
Xin Sheng Huang
Keyword(s):  
Finite Element ◽  
Middle Ear ◽  
Computer Tomography ◽  
Physiological Data ◽  
Fe Model ◽  
External Ear ◽  
Ear Canal ◽  
External Ear Canal ◽  
Hearing Devices ◽  
Human Ear

An accurate finite element (FE) model of the human ear can help in understanding the physiological mechanismof human ear and facilitate the design of implantable hearing devices. In this paper,a FE modelof the human ear consisting of the external ear canal, middle ear, and cochlea was developed. The geometry of the external ear canal and middle ear model was based on a fresh specimen of human temporal boneviamicro-computer tomography imaging. A harmonic sound pressure of 90 dB SPL was applied in the ear canal and the multi-field coupled FE analysis was conductedamong the ear canal air, cochlea fluid, and middle ear and cochlea structures. The results were compared with the established physiological data. The satisfactory agreements between the model and published experimental measurementsindicate the middle ear and cochlea functions can be well simulated and further application in terms of human ear can be achieved by the model.

scholarly journals Computed tomographic grading of middle ear disease in domestic rabbits (Oryctolagus cuniculi)

2019 ◽  
Vol 184 (22) ◽  
pp. 679-679 ◽  
Author(s):  
Jenna Richardson ◽  
Maurizio Longo ◽  
Tiziana Liuti ◽  
Kevin Eatwell
Keyword(s):  
Imaging Modality ◽  
Severe Disease ◽  
Treatment Options ◽  
Clinical Signs ◽  
Ct Images ◽  
External Ear ◽  
Ear Canal ◽  
Diagnostic Quality ◽  
External Ear Canal ◽  
Grading Scale

Ear disease, involving the middle and external ear, is commonly reported in pet rabbits, with lop-eared breeds predisposed. CT is the most reliable imaging modality for identifying otitis media (OM) in rabbits. This study aimed to develop a CT-based grading scale to classify the severity of CT changes in rabbits with presumed OM. Three observers independently reviewed CT images of 36 rabbits with OM. For both OM and material within the external ear canal, a grade of I to IV was used, (I=mild, IV=severe disease) and the level of agreement between reviewers was statistically evaluated. The study demonstrated that grades from the three reviewers showed a strong level of interobserver agreement. Comparisons between clinical signs and CT grade were also evaluated. Rabbits with grade IV OM had a high grade of material in the external ear canal. A high proportion of rabbits (83 per cent) underwent CT scanning conscious, demonstrating that diagnostic quality CT images are achievable without the need for anaesthetic intervention, minimising patient risk. This novel CT-based grading scale provides a methodology to correlate grade of disease with clinical signs, ear canal cytology, predisposing factors, treatment options and outcomes for rabbits with ear disease.

Rhabdomyosarcoma of the External Ear Canal Treated with Brachytherapy

2016 ◽  
Vol 2016 (1) ◽  
Author(s):  
Mahvish Qureshi MD ◽  
◽  
Sana Farooki MD ◽  
Chibuzo O’Suoji MD ◽  
◽  
...  
Keyword(s):  
External Ear ◽  
Ear Canal ◽  
External Ear Canal

scholarly journals Review of Bone Conduction Hearing Devices

2021 ◽  
Vol 11 (2) ◽  
pp. 207-219
Author(s):  
Susan E. Ellsperman ◽  
Emily M. Nairn ◽  
Emily Z. Stucken
Keyword(s):  
Hearing Aid ◽  
Bone Conduction ◽  
Sound Transmission ◽  
Ear Canal ◽  
Hearing Devices ◽  
Bone Conduction Hearing ◽  
Single Sided Deafness

Bone conduction is an efficient pathway of sound transmission which can be harnessed to provide hearing amplification. Bone conduction hearing devices may be indicated when ear canal pathology precludes the use of a conventional hearing aid, as well as in cases of single-sided deafness. Several different technologies exist which transmit sound via bone conduction. Here, we will review the physiology of bone conduction, the indications for bone conduction amplification, and the specifics of currently available devices.

An overview of proximal suspensory ligament desmitis

UK-Vet Equine ◽  
2019 ◽  
Vol 3 (5) ◽  
pp. 175-181
Author(s):  
Jonathan Anderson
Keyword(s):  
Treatment Options ◽  
Poor Performance ◽  
Diagnostic Techniques ◽  
Common Cause ◽  
Suspensory Ligament ◽  
The Common ◽  
Hindlimb Lameness

Proximal suspensory disease is a common cause of both forelimb and hindlimb lameness and poor performance in the horse. The following article describes the common presentations, diagnostic techniques and treatment options for the condition in both the forelimbs and the hindlimbs.

Prevalence of external ear disorders in Belgian stray cats

2017 ◽  
Vol 20 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Anouck Bollez ◽  
Hilde de Rooster ◽  
Alessandra Furcas ◽  
Sophie Vandenabeele
Keyword(s):  
Body Condition ◽  
Otitis Externa ◽  
Body Condition Score ◽  
External Ear ◽  
Ear Canal ◽  
Malassezia Species ◽  
External Ear Canal ◽  
Stray Cats ◽  
Condition Score ◽  
Ocular Discharge

Objectives Feline otitis externa is a multifactorial dermatological disorder about which very little is known. The objective of this study was to map the prevalence of external ear canal disorders and the pathogens causing otitis externa in stray cats roaming around the region of Ghent, Belgium. Methods One hundred and thirty stray cats were randomly selected during a local trap–neuter–return programme. All cats were European Shorthairs. This study included clinical, otoscopic and cytological evaluation of both external ears of each cat. Prospective data used as parameters in this study included the sex, age and body condition score of each cat, as well as the presence of nasal and/or ocular discharge, and the results of feline immunodeficiency virus (FIV) and feline leukaemia virus (FeLV) Snap tests. Results Remarkably, very few (sub)clinical problems of the external ear canal were found in the stray cat population. Malassezia species was by far the most common organism found in the external ear canals of the 130 stray cats. A total of 96/130 (74%) cats were found to have Malassezia species organisms present in one or both ears based on the cytological examination. No correlation was found between the parameters of sex, age, body condition score, the presence of nasal and/or ocular discharge and FIV and FeLV status, and the presence of parasites, bacteria or yeasts. Conclusions and relevance This study provides more information about the normal state of the external ear canal of stray cats. The ears of most stray cats are relatively healthy. The presence of Malassezia species organisms in the external ear canal is not rare among stray cats.

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