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https://www.readbyqxmd.com/read/27884347/fabrication-of-three-dimensional-scan-to-print-ear-model-for-microtia-reconstruction
#1
Byoungjun Jeon, Chiwon Lee, Myungjoon Kim, Tae Hyun Choi, Sungwan Kim, Sukwha Kim
BACKGROUND: Microtia is a congenital deformity of the external ear that occurs in 1 of every 5000 births. Microtia reconstruction using traditional two-dimensional templates does not provide highly detailed ear shapes. Here, we describe the feasibility of using a three-dimensional (3D) ear model as a reference. MATERIALS AND METHODS: Seven children aged from 11 to 16 (6 grade III and 1 grade II microtia) were recruited from Seoul National University Children's Hospital, Korea...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27863625/facial-nerve-stimulation-following-cochlear-implantation-for-x-linked-stapes-gusher-syndrome-leading-to-identification-of-a-novel-pou3f4-mutation
#2
Jacob L Wester, Catherine Merna, Kevin A Peng, Rebecca Lewis, Ali R Sepahdari, Gail Ishiyama, Kumiko Hosokawa, Kozo Kumakawa, Akira Ishiyama
We report a case of a nine-year-old male who presented with facial nerve stimulation four years after cochlear implantation. Computed tomography was performed revealing a dilated internal auditory meatus and the cochlear implant electrode was found to be protruding into the fallopian canal at the level of the geniculate ganglion. Subsequent genetic analysis demonstrated X-linked deafness type 2 (DFNX2) caused by a novel c.769C > T nucleotide change in the POU domain, class 3, transcription factor 4 gene (POU3F4)...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27818543/vascular-loops-in-the-anterior-inferior-cerebellar-artery-as-identified-by-magnetic-resonance-imaging-and-their-relationship-with-otologic-symptoms
#3
Luiz de Abreu Junior, Cristina Hiromi Kuniyoshi, Angela Borri Wolosker, Maria Lúcia Borri, Augusto Antunes, Vanessa Kiyomi Arashiro Ota, Daniela Uchida
OBJECTIVE: To use magnetic resonance imaging to identify vascular loops in the anterior inferior cerebellar artery and to evaluate their relationship with otologic symptoms. MATERIALS AND METHODS: We selected 33 adults with otologic complaints who underwent magnetic resonance imaging at our institution between June and November 2013. Three experienced independent observers evaluated the trajectory of the anterior inferior cerebellar artery in relation to the internal auditory meatus and graded the anterior inferior cerebellar artery vascular loops according to the Chavda classification...
September 2016: Radiologia Brasileira
https://www.readbyqxmd.com/read/27762257/soft-tissue-conduction-as-a-possible-contributor-to-the-limited-attenuation-provided-by-hearing-protection-devices
#4
Shai Chordekar, Cahtia Adelman, Haim Sohmer, Liat Kishon-Rabin
CONTEXT: Damage to the auditory system by loud sounds can be avoided by hearing protection devices (HPDs) such as earmuffs, earplugs, or both for maximum attenuation. However, the attenuation can be limited by air conduction (AC) leakage around the earplugs and earmuffs by the occlusion effect (OE) and by skull vibrations initiating bone conduction (BC). AIMS: To assess maximum attenuation by HPDs and possible flanking pathways to the inner ear. SUBJECTS AND METHODS: AC attenuation and resulting thresholds were assessed using the real ear attenuation at threshold (REAT) procedure on 15 normal-hearing participants in four free-field conditions: (a) unprotected ears, (b) ears covered with earmuffs, (c) ears blocked with deeply inserted customized earplugs, and (d) ears blocked with both earplugs and earmuffs...
September 2016: Noise & Health
https://www.readbyqxmd.com/read/27736232/bilateral-aural-adenocarcinoma-in-a-congo-african-grey-parrot-psittacus-erithacus-erithacus
#5
Emma L Houck, Krista A Keller, Michelle G Hawkins, Andrew G Burton, Keriann M Casey, Kevin Keel, Nathan Tong, David Sanchez-Migallon Guzman
A 28-year-old female Congo African grey parrot ( Psittacus erithacus erithacus) was evaluated because of a mass in the left external auditory meatus. Results of a computed tomography scan revealed an osteolytic left hemimandibular mass with irregular bone production and a soft tissue mass in the left external auditory meatus. Results of cytologic examination of fine needle aspirates of the hemimandible were interpreted as adenocarcinoma with reactive osteoblasts. The owner chose palliative treatment, and a debulking procedure was performed on the left external auditory meatus mass 52 days after initial presentation to control self-trauma...
September 2016: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/27727083/problems-and-pitfalls-of-qualification-for-extracorporeal-rewarming-in-severe-accidental-hypothermia
#6
REVIEW
Anna Jarosz, Sylweriusz Kosiński, Tomasz Darocha, Peter Paal, Robert Gałązkowski, Hubert Hymczak, Rafał Drwiła
OBJECTIVES: When establishing the Severe Hypothermia Treatment Centre, certain problems and pitfalls regarding the qualification for extracorporeal rewarming were encountered. The authors shared their experience and opened a discussion with other centers that deal with severe, accidental hypothermia. DESIGN: Retrospective analysis of medical records of all patients examined by the hypothermia coordinator. SETTING: Patients consulted and treated by the Severe Hypothermia Treatment Centre...
December 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27626087/is-a-solitary-fibrous-tumor-in-the-external-auditory-canal-benign
#7
Chi-Kyou Lee, Hyun Ju Lee
A solitary fibrous tumor (SFT) is an extremely rare, distinct otological soft-tissue tumor. Only two such tumors in the external auditory canal have been reported. A SFT related to hemangiopericytomas (HPC), which commonly arise in the central nervous system. HPCs act malignant in many cases, while SFTs at other sites are mainly benign. A 25-year-old female presented with highly vascular tumor at the right external auditory meatus and bleeding from the mass when a crust was removed from its surface. After excisional biopsy followed by pre-operative embolization, this tumor confirmed with SFT...
September 2016: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/27606016/computed-tomography-morphometric-analysis-of-the-central-clival-depression-and-petroclival-angle-for-application-of-the-presigmoid-approach-in-the-pediatric-population
#8
Sohum K Desai, Da'Marcus Baymon, Eric Sieloff, Kenneth Maynard, Marc Moisi, Achal P Patel, Joel T Patterson
AIMS: Lateral transtemporal approaches are useful for addressing lesions located ventral to the brainstem, especially when the pathologic diagnosis of the tumor dictates that a gross or near total resection improves outcomes. One approach, the presigmoid approach receives little attention in the pediatric population thus far. We sought to characterize morphometric changes, particularly the clival depth and the petroclival Cobb angle, that occur in the temporal bones of children and draw implications about doing a presigmoid approach in children...
April 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27591576/finite-element-modelling-of-sound-transmission-from-outer-to-inner-ear
#9
Bruno Areias, Carla Santos, Renato M Natal Jorge, Fernanda Gentil, Marco Pl Parente
The ear is one of the most complex organs in the human body. Sound is a sequence of pressure waves, which propagates through a compressible media such as air. The pinna concentrates the sound waves into the external auditory meatus. In this canal, the sound is conducted to the tympanic membrane. The tympanic membrane transforms the pressure variations into mechanical displacements, which are then transmitted to the ossicles. The vibration of the stapes footplate creates pressure waves in the fluid inside the cochlea; these pressure waves stimulate the hair cells, generating electrical signals which are sent to the brain through the cochlear nerve, where they are decoded...
September 2, 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/27586750/auditory-sensitivity-to-local-stimulation-of-the-head-surface-in-a-beluga-whale-delphinapterus-leucas
#10
Vladimir V Popov, Evgeniya V Sysueva, Dmitry I Nechaev, Alena A Lemazina, Alexander Ya Supin
Using the auditory evoked response technique, sensitivity to local acoustic stimulation of the ventro-lateral head surface was investigated in a beluga whale (Delphinapterus leucas). The stimuli were tone pip trains of carrier frequencies ranging from 16 to 128 kHz with a pip rate of 1 kHz. For higher frequencies (90-128 kHz), the low-threshold point was located next to the medial side of the middle portion of the lower jaw. For middle (32-64 kHz) and lower (16-22.5 kHz) frequencies, the low-threshold point was located at the lateral side of the middle portion of the lower jaw...
August 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27586115/neck-forces-and-moments-of-human-volunteers-and-post-mortem-human-surrogates-in-low-speed-frontal-sled-tests
#11
Stephanie M Beeman, Andrew R Kemper, Stefan M Duma
OBJECTIVE: The objective of this study was to quantify the effects of active muscles (e.g. conscious bracing, resting tone, and reflex response) and acceleration severity on the neck forces and moments generated during low-speed frontal sled tests with adult male human volunteers and post mortem human surrogates (PMHSs). METHODS: A total of 24 frontal sled tests were analyzed including male volunteers of approximately 50th percentile height and weight (n = 5) and PMHSs (n = 2)...
September 2016: Traffic Injury Prevention
https://www.readbyqxmd.com/read/27513703/surgical-management-of-petrous-apex-cholesterol-granulomas-by-an-infralabyrinthine-approach-our-experience-with-fourteen-cases
#12
F Y Russo, D De Seta, I Mosnier, O Sterkers, D Bernardeschi
No abstract text is available yet for this article.
August 11, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27500982/morphogenesis-of-the-middle-ear-ossicles-and-spatial-relationships-with-the-external-and-inner-ears-during-the-embryonic-period
#13
Maimi Ozeki-Satoh, Aoi Ishikawa, Shigehito Yamada, Chigako Uwabe, Tetsuya Takakuwa
We describe the three-dimensional morphogenesis of the middle ear ossicles (MEOs) according to Carnegie stage (CS) in human embryos. Seventeen samples including 33 MEOs from CS18 to 23 were selected from the Kyoto Collection. The primordia of the MEOs and related structures were histologically observed and three-dimensionally reconstructed from digital images. The timing of chondrogenesis was variable among structures. The stapes was recognizable as a vague condensation of the mesenchymal cells in all samples from CS18, whereas the malleus and incus were recognizable at CS19...
October 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27488335/the-role-of-subtotal-petrosectomy-in-cochlear-implantation
#14
P Casserly, P L Friedland, M D Atlas
BACKGROUND: Subtotal petrosectomy combined with cochlear implantation is a procedure required in specific situations. METHODS: A retrospective review of all cases of subtotal petrosectomy in cochlear implant surgery over a five-year period was performed. The indications, complications and outcomes for this procedure are outlined. RESULTS: Sixteen patients underwent cochlear implantation in combination with subtotal petrosectomy and blind sac closure of the external auditory meatus from 2008 to 2013...
July 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27470933/a-test-of-darwin-s-lop-eared-rabbit-hypothesis
#15
G A Cordero, C M Berns
Integration of evolutionary and developmental biology has stimulated novel insights on the origins and maintenance of phenotypic variation. For instance, phenotypic accommodation predicts that trait covariance originates via a novel developmental input caused by genetic change in one trait, but not the other. Darwin provided a striking example of this process in the 'lop-eared' rabbit by demonstrating that artificial selection for long external ears induced variation in the external auditory meatus. Although this intriguing pattern has been interpreted as evidence of phenotypic accommodation, it is unclear whether it exists and, if it does, whether it is selectively maintained in nature...
July 28, 2016: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/27427536/tubal-function-tests-with-optional-myringotomy-detect-eustachian-tube-closing-failure-in-acquired-pars-flaccida-retraction-cholesteatoma
#16
Phawana Asawapittayanont, Ryoukichi Ikeda, Hidetoshi Oshima, Toshiaki Kikuchi, Hiromitsu Miyazaki, Tetsuaki Kawase, Yukio Katori, Toshimitsu Kobayashi
OBJECTIVE: To re-evaluate the incidence of Eustachian tube closing failure in acquired middle ear cholesteatoma. METHOD: Thirty-one cases with acquired middle ear cholesteatoma who received surgery were enrolled. Presence of Eustachian tube closing failure was determined through two Eustachian tube function tests. First Step Tests: Test 1: Positive sniff test identified by retraction of the tympanic membrane upon sniffing was observed. Test 2: The pressure in the external auditory meatus was found to change synchronously with that of the nasopharynx during respiration or upon sniffing...
July 11, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27382673/-the-treatment-of-otosclerosis-using-laser-assisted-stapedotomy-with-mini-incision-in-external-auditory-meatus
#17
Xinping Hao, Shubin Chen, Zilong Yu, Fenghe Liang, Yongxin Li
OBJECTIVE: To investigate the feasibility of the treatment of otosclerosis using laser stapedotomy with mini incision in the external auditory meatus. METHOD: Thirteen patients(15 ears) with otosclerosis evidence on clinic history. They were all operated using the laser assisted stapedotomy by mini incision in external auditory meatus because of the wide straight canal. Laser resection the tendo musculistapedius and anterior and postrior arch, breaking the articulatioincudostapedia, removing the stapes superstructure, making a hole of 6mm diameter in the rear of stapes footplate by laser drilling, implanting the corresponding length Piston artificial ossicle...
March 2016: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/27368021/radiofrequency-thermocoagulation-for-v2-v3-idiopathic-trigeminal-neuralgia-effect-of-treatment-temperatures-on-long-term-clinical-outcomes-a-cohort-study
#18
Peng Yao, Yi-Yong Deng, Tao Hong, Zhi-Bin Wang, Jia-Ming Ma, Yong-Qiang Zhu, Hong-Xi Li, Yuan-Yuan Ding, Shi-Nong Pan
Radiofrequency thermocoagulation (RFT) is widely used to treat trigeminal neuralgia (TN); however, the optimal temperature at which RFT is most efficacious remains under much debate. Thus, the aim of the present study was to determine the lowest temperature at which morbidity could be minimized and patient outcomes maximized.A multivariate analysis was used to study 1354 patients who underwent computed tomography (CT)-guided RFT for V2/V3 idiopathic trigeminal neuralgia (ITN) during from June 2006 to May 2015...
June 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27367351/-the-current-views-of-the-treatment-of-diffuse-external-otitis
#19
O V Fedorova, G B Shadrin
The objective of the present study was to evaluate the clinical effectiveness and safety of the local application of triderm for the treatment of diffuse external otitis. The study included 68 patients presenting with bacterial and fungal diffuse external otitis. The treatment in the form of local empiric therapy was continued till the results of microbiological treatment became apparent. The beneficial outcome achieved in 91.2% of the patients was clinically manifest as the regression of the inflammatory process in the external auditory meatus...
2016: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/27367342/-the-application-of-the-lyophilized-xenodermoimplants-for-the-plastic-correction-of-the-external-auditory-canal-and-nasal-septum-perforation
#20
V F Antoniv, V I Popadyuk, V M Aksenov, T V Antoniv, I A Korshunova
The objective of the present work was to improve the effectiveness of the treatment of atresia of the external auditory canal (EAC). Atresia of external acoustic meatus is a result of a mechanical or thermal injury but can also develop after a surgical intervention for the removal of foreign bodies, benign and malignant tumours. This condition is frequently associated with the narrowing and obliteration of EAC leading to the marked impairment of hearing despite preservation of the middle ear structures. Plastic correction of the external auditory canal for the purpose of its broadening does not always produce the desired result...
2016: Vestnik Otorinolaringologii
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