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Ear reconstruction

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https://www.readbyqxmd.com/read/28822316/improved-middle-ear-soft-tissue-visualization-using-synchrotron-radiation-phase-contrast-imaging
#1
Mai Elfarnawany, Seyed Alireza Rohani, Soroush Ghomashchi, Daniel G Allen, Ning Zhu, Sumit K Agrawal, Hanif M Ladak
High resolution images are used as a basis for finite-element modeling of the middle-ear structures to study their biomechanical function. Commonly used imaging techniques such as micro-computed tomography (CT) and optical microscopy require extensive sample preparation, processing or staining using contrast agents to achieve sufficient soft-tissue contrast. We compare imaging of middle-ear structures in unstained, non-decalcified human temporal bones using conventional absorption-contrast micro-CT and using synchrotron radiation phase-contrast imaging (SR-PCI)...
August 5, 2017: Hearing Research
https://www.readbyqxmd.com/read/28816689/single-stage-canal-wall-down-mastoidectomy-with-reconstruction-of-the-canal-wall-5-years-experience-in-fayoum-province-egypt
#2
Mohamed Qotb, Tamer Fawzy, Waleed Ragab
OBJECTIVE: Removing the posterior canal wall or canal wall down mastoidectomy (CWDM) for the management of cholesteatoma remains controversial. We advocate partial removal of the posterior canal wall for complete eradication, followed by canal wall defect reconstruction to restore the normal anatomy and avoid the complications of CWDM. MATERIALS AND METHODS: Sixty-four patients with cholesteatoma (71 ears) were included. This study was conducted between 2009 and 2012...
August 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28810456/components-of-preoperative-anxiety-a-qualitative-study
#3
Amy King, Jim Bartley, Deborah L Johanson, Elizabeth Broadbent
Limited research has explored preoperative anxiety through qualitative methodologies. This study aimed to identify specific factors that contribute to preoperative anxiety. A total of 17 patients awaiting general, plastic reconstructive and hand, orthopaedic, or ear, nose, and throat/otorhinolaryngology surgery were interviewed about their concerns in a public hospital. Thematic analysis identified five main sources of anxiety: surgical procedures, surgical complications, symptoms, recovery process, and organisation and delivery of care...
May 1, 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28803051/variations-in-the-labyrinthine-segment-of-facial-nerve-canal-revealed-by-high-resolution-computed-tomography
#4
Aiyan Jin, Peng Xu, Fengqin Qu
OBJECTIVE: To study variations in the labyrinthine segment of fallopian canal and the associated middle and inner ear malformations. METHOD: The high-resolution computed tomography (HRCT) images of the temporal bone in 24 patients with congenital variations in the labyrinthine segment of fallopian canal were analyzed retrospectively. The length of labyrinthine segment of the facial nerve and angle of the first genu of 10 normal subjects were also measured. Based on the original axial images, multi-planar reformation (MPR) and curved-planar reformation (CPR) images of bilateral ossicular chains, inner ear structure and fallopian canal were reconstructed...
August 9, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28798551/total-ear-reconstruction-using-porous-polyethylene
#5
REVIEW
Kausar Ali, Jeffrey G Trost, Tuan A Truong, Raymond J Harshbarger
Total ear reconstruction has been approached by several techniques involving autologous graft, prosthetic implant, and alloplastic implant options. Recent studies have shown the superiority of porous polyethylene (Medpor, Porex Surgical) reconstruction over autologous reconstruction based on improved aesthetic results, earlier age of intervention, shorter surgery times, fewer number of required procedures, and a simpler postoperative recovery process. A durable and permanent option for total ear reconstruction, like Medpor, can help alleviate the cosmetic concerns that patients with auricular deformities may be burdened with on a daily basis...
August 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28798550/the-protruding-ear-cosmetic-and-reconstruction
#6
REVIEW
Kausar Ali, Jesse D Meaike, Renata S Maricevich, Asaf Olshinka
Ear prominence is a relatively common cosmetic deformity with no associated functional deficits, but with profound psychosocial impact, especially in young patients. Protruding ears in children have propagated surgical advances that incorporate reconstructive techniques. Here we outline a systematic framework to evaluate the protruding ear and present various reconstructive surgical options for correction. Both cosmetic and reconstructive perspectives should be entertained when addressing this anatomical deformity...
August 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28798549/autologous-ear-reconstruction
#7
REVIEW
Asaf Olshinka, Matthew Louis, Tuan A Truong
Since the pioneering use of autologous rib cartilage for the reconstruction of microtia, there have been significant advances in surgical technique that have helped to ameliorate the psychological burden of microtia. To date, the use of rib cartilage for auricular reconstruction is one of the most enduring and ubiquitous techniques for microtia reconstruction as it provides excellent aesthetic results with lasting durability. In this review, the authors outline the most common methods of microtia reconstruction with a comparison of each technique and illustrative case examples...
August 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28798547/partial-ear-defects
#8
REVIEW
Brent B Pickrell, Christopher D Hughes, Renata S Maricevich
Reconstruction of partial ear defects represents one of the most challenging areas within reconstructive surgery of the head and neck. Each case of auricular reconstruction is unique and warrants a systematic approach that accounts for defect size and location, the quality of the surrounding skin, patient preference, and operator experience. In this article, the authors outline different reconstructive approaches for defects of the upper-, middle-, and lower-third of the auricle. The relevant anatomy is discussed in detail...
August 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28798545/ear-reconstruction
#9
Tuan A Truong, Renata S Maricevich
No abstract text is available yet for this article.
August 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28796085/audiometric-outcomes-following-endoscopic-ossicular-chain-reconstruction
#10
Robert J Yawn, Jacob B Hunter, Brendan P O'Connell, George B Wanna, Daniel E Killeen, Cameron C Wick, Brandon Isaacson, Alejandro Rivas
OBJECTIVE: To evaluate the audiometric outcomes following endoscopic ossicular chain reconstruction (OCR). STUDY DESIGN: Retrospective case series. SETTING: Two tertiary referral centers. PATIENTS: Sixty two ears with ossicular discontinuity. INTERVENTION(S): Endoscopic and microscopic OCR in patients with ossicular discontinuity. MAIN OUTCOME MEASURES: Bone and air pure-tone averages (PTA), air-bone gap (ABG), and word recognition scores (WRS)...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28796082/the-first-reported-case-of-primary-intestinal-type-adenocarcinoma-of-the-middle-ear-and-review-of-the-literature
#11
Marc-Elie Nader, Diana Bell, Lawrence Ginsberg, Franco DeMonte, G Brandon Gunn, Paul W Gidley
OBJECTIVE: Adenocarcinoma of the middle ear is a rare entity that must be distinguished from other adenomatous tumors of the temporal bone. We present the first patient of an intestinal-type adenocarcinoma originating from the middle ear. PATIENTS: A 58-year-old woman presented with an 8-year history of left otorrhea. Her middle ear effusions were quite thick and gummy. She underwent eight sets of pressure-equalization tubes within 3 years. In 2011, her physical examination identified a middle ear mass, and she underwent mastoidectomy...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28794401/three-dimensional-reconstruction-of-root-cells-and-interdental-cells-in-the-rat-inner-ear-by-serial-section-scanning-electron-microscopy
#12
Ryusuke Shodo, Manabu Hayatsu, Daisuke Koga, Arata Horii, Tatsuo Ushiki
In the cochlea, a high K(+) environment in the endolymph is essential for the maintenance of normal hearing function, and the transport of K(+) ions through gap junctions of the cochlear epithelium is thought to play an important role in endolymphatic homeostasis. The aim of the present study was to demonstrate the three-dimensional (3D) ultrastructure of spiral ligament root cells and interdental cells, which are located at both ends of the gap junction system of the cochlea epithelium. Serial semi-thin sections of plastic-embedded rat cochlea were mounted on glass slides, stained with uranyl acetate and lead citrate, and observed by scanning electron microscopy (SEM) using the backscattered electron (BSE) mode...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28768750/echo-acoustic-scanning-with-noseleaf-and-ears-in-phyllostomid-bats
#13
Kathrin Kugler, Lutz Wiegrebe
The mammalian visual system is highly directional and mammals typically employ rapid eye movements to scan their environment. Both sound emission and hearing in echolocating bats are directional but not much is known about how bats use ear movements and possibly movements of the sound-emitting structures to scan space. Here, we investigated in a tightly controlled behavioural experiment how Phyllostomusdiscolor bats employ their echolocation system while being moved through differently structured environments: we monitored and reconstructed both a close-up of the facial structures in 3D, including the motile noseleaf and outer ears, and the sonar-beam of the bat while it was moved along reflectors...
August 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28746277/auricular-tissue-engineering-using-osteogenic-differentiation-of-adipose-stem-cells-with-small-intestine-submucosa
#14
Chih-Hsun Lin, I-Chen Yang, Chi-Han Tsai, Hsu-Wei Fang, Hsu Ma
BACKGROUND: Ear reconstruction remains a challenge for plastic surgeons. A tissue-engineering approach could provide another route for obtaining shape maintenance in neoauricular tissue. METHODS: The authors designed a novel tissue-engineering auricular construct by culturing human adipose stem cells, which differentiated into osteocytes but not chondrocytes, in small intestine submucosa scaffolds. The authors evaluated cell growth potential and mechanical properties...
August 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28736098/posterior-canal-wall-reposition-for-management-of-cholesteatoma-technique-and-results
#15
Mohammad Kamal Mobashir, Waleed M Basha, Abd ElRaof Said Mohamed, Mohammed Elsayed Elmaghawry
OBJECTIVE: The main goal of surgery in acquired middle ear cholesteatomas is the complete eradication of the disease with an ear free of discharge. This can be performed either by open or closed techniques with their benefits and drawbacks. We present the technique of reposition of the posterior canal wall for the management of cholesteatoma cases and its results and outcome. PATIENTS AND METHODS: This study included 31 patients with primary acquired middle ear cholesteatoma...
July 20, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28734754/cost-analysis-of-microtia-treatment-in-the-netherlands
#16
M N Kolodzynski, C V A van Hövell Tot Westerflier, M Kon, C C Breugem
INTRODUCTION: Ear reconstruction for microtia is a challenging procedure. Although analyzing esthetic outcome is crucial, there is a paucity of information with regard to financial aspects of microtia reconstruction. This study was conducted to analyze the costs associated with ear reconstruction with costal cartilage in patients with microtia. METHODS: Ten consecutive children with autologous ear reconstruction of a unilateral microtia were included in this analysis...
June 28, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28728240/-the-implantation-of-bonebridge-in-bilateral-congenital-malformation-of-external-and-middle-ear
#17
S Q Zhao, R Ren, D M Han, Y Li, X B Ma, D N Wang, Y L Li
Objective: To evaluate the auditory efficacy of Bonebridge implantation in patients with bilateral congenital malformation of external and middle ear. Methods: Eleven cases (6 males and 5 females) had unilateral Bonebridge implantation. The age ranged from 8 to 26 and the average age was 16.9. Seven to ten days after operation, the first fitting was undergone. In acoustic sound field, the average auditory thresholds were respectively measured for unaided ears and Bonebridge implanted ears by pure tone auditory (PTA, 0...
July 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28726587/repair-of-tympanic-membrane-perforations-with-customized-bioprinted-ear-grafts-using-chinchilla-models
#18
Che-Ying Kuo, Emmanuel Wilson, Andrew Fuson, Nidhi Gandhi, Reza Monfaredi, Audrey Jenkins, Maria Romero, Marco Santoro, John P Fisher, Kevin Cleary, Brian Reilly
The goal of this work is to develop an innovative method that combines bioprinting and endoscopic imaging to repair tympanic membrane perforations (TMPs). TMPs are a serious health issue because they can lead to both conductive hearing loss and repeated otitis media. TMPs occur in 3 to 5% of cases after ear tube placement as well as in cases of acute otitis media (the second most common infection in pediatrics), chronic otitis media with or without cholesteatoma, or as a result of barotrauma to the ear. About 55,000 tympanoplasties, the surgery performed to reconstruct TMPs, are performed every year and the commonly used cartilage grafting technique has a success rate between 43% to 100%...
July 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28722532/bi-institutional-retrospective-study-on-the-demographics-and-basic-clinical-presentation-of-hidrocystomas
#19
Michelle Maeng, Paul Petrakos, Mei Zhou, Benjamin Levine, Gary Lelli, Pete Setabutr
Hidrocystomas are benign, cystic lesions of eccrine and apocrine sweat glands. The literature on hidrocystomas is sparse, consisting of a handful of case reports and limited retrospective reviews. This is the first known bi-institutional, retrospective, chart review aimed to elucidate the demographics and basic clinical presentation of hidrocystomas. Medical records of adult patients with a pathological diagnosis of hidrocystoma from September 1, 2008 to August 1, 2015 in the Oculoplastic and Reconstructive Surgery Service at the Illinois Eye and Ear Infirmary (UIC) and Department of Ophthalmology of Weill Cornell Medical College (Cornell) were reviewed...
July 19, 2017: Orbit
https://www.readbyqxmd.com/read/28692518/costal-cartilage-assessment-in-surgical-timing-of-microtia-reconstruction
#20
Zhongyang Sun, Xiaobo Yu, Weiwei Chen, Qinghua Yang, Yupeng Song, Jiayu Zhou, Haiyue Jiang
BACKGROUND: Rib cartilage growth is closely related to age and determines the feasibility and outcomes of auricular reconstruction. Ear reconstruction is performed as early as age 6 in efforts to treat children before school matriculation while allowing for sufficient rib growth. But there is controversy over the optimal timing of microtia reconstruction. This study employs CT imaging and surface scanning to guide the timing of auricular reconstruction in children. METHODS: A retrospective analysis was performed on 6-year-old microtia patients between January 2016 and June 2016...
July 7, 2017: Journal of Craniofacial Surgery
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