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temporal bone trauma

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https://www.readbyqxmd.com/read/28796083/a-new-slim-modiolar-electrode-array-for-cochlear-implantation-a-radiological-and-histological-study
#1
Matti Iso-Mustajärvi, Hanna Matikka, Frank Risi, Sini Sipari, Teemu Koski, Tytti Willberg, Antti Lehtimäki, Jyrki Tervaniemi, Heikki Löppönen, Aarno Dietz
HYPOTHESIS: To explore the results of a new slim modiolar electrode array (SMA) with respect to intracochlear placement and trauma evaluated by detailed radiologic imaging and histology. BACKGROUND: Hearing and structure preservation is the goal of cochlear implantation for advanced hearing outcomes. Currently, this is most consistently achieved with thin lateral wall electrodes. Modiolar electrodes are located nearer the modiolus and may provide some electrophysiological advantages, but have a greater tendency for causing insertion trauma...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28697349/styloid-process-fracture-associated-with-maxillofacial-trauma-incidence-distribution-and-management
#2
P K Tiwary, N K Sahoo, Ankur Thakral, Udayan Ranjan
PURPOSE: Fracture of the styloid process of the temporal bone has been infrequently reported. The present study evaluated the incidence, causes, distribution, and management of styloid process fracture in association with other maxillofacial fractures. MATERIALS AND METHODS: A prospective evaluation of patients with maxillofacial trauma over a period of 1 year was carried out and patients' characteristics, mode and distribution of injury, and length of styloid process were recorded...
June 23, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28678056/enlarged-vestibular-aqueduct-syndrome-sudden-hearing-loss-in-a-child-with-a-cerebral-shunt
#3
Wendi-Jo Wendt, Andrew Hashikawa
Enlarged vestibular aqueduct syndrome (EVAS) is the most common congenital ear anomaly that causes sensorineural hearing loss in children and may predispose a child to sudden hearing loss from sudden pressure changes or minor head trauma. We report a case of a 4-year-old boy with a history of a ventriculoperitoneal shunt and migraines who presented to the emergency department with parental and child care provider reports of acute hearing loss, without a history of trauma, infection, or hardware malfunction, who was diagnosed with bilateral EVAS...
July 4, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28653305/volumetric-evaluation-of-temporal-bone-structures-in-the-cases-with-bilateral-tinnitus-clinical-and-morphometrical-study
#4
Nuket Gocmen Mas, Orhan Kahveci, Sevda Lafcı Fahrioğlu, Nazan Okur, Sinan Canan, Nilufer Demirci Yonguc, Oktay Özel, Selim Karabekir
BACKGROUND: Tinnitus is the recognition of sound in the absence of any external auditory stimulus to the noise of ringing in the ears. Middle ear aeration carries important role for ossicular coupling and normal hearing. There is restricted morphometric data on the cases with bilateral tinnitus. MATERIAL AND METHODS: In this study we evaluated hearing findings of 18 cases with subjective nonpulsatile bilateral tinnitus and also morphometry and volumetry of temporal bone substructures on the Computed Tomography images using Stereological Method compared with the gender and age matched 12 healthy subjects...
June 27, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28646272/rhesus-cochlear-and-vestibular-functions-are-preserved-after-inner-ear-injection-of-saline-volume-sufficient-for-gene-therapy-delivery
#5
Chenkai Dai, Mohamed Lehar, Daniel Q Sun, Lani Swarthout Rvt, John P Carey, Tim MacLachlan, Doug Brough, Hinrich Staecker, Alexandra M Della Santina, Timothy E Hullar, Charles C Della Santina
Sensorineural losses of hearing and vestibular sensation due to hair cell dysfunction are among the most common disabilities. Recent preclinical research demonstrates that treatment of the inner ear with a variety of compounds, including gene therapy agents, may elicit regeneration and/or repair of hair cells in animals exposed to ototoxic medications or other insults to the inner ear. Delivery of gene therapy may also offer a means for treatment of hereditary hearing loss. However, injection of a fluid volume sufficient to deliver an adequate dose of a pharmacologic agent could, in theory, cause inner ear trauma that compromises functional outcome...
August 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28551022/the-relationship-between-post-traumatic-ossicular-injuries-and-conductive-hearing-loss-a-3d-ct-study
#6
Olivier Maillot, Arnaud Attyé, Claire Boutet, Kamel Boubagra, Romain Perolat, Marion Zanolla, Sylvie Grand, Sébastien Schmerber, Alexandre Krainik
PURPOSE: After a trauma, the conductive ossicular chain may be disrupted by ossicular luxation or fracture. Recent developments in 3D-CT allow a better understanding of ossicular injuries. In this retrospective study, we compared patients with post-traumatic conductive hearing loss (CHL) with those referred without CHL to evaluate the relationship between ossicular injuries and CHL. We also assessed the added value of 3D reconstructions on 2D-CT scan to detect ossicular lesions in patients surgically managed...
May 24, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28534710/systematic-review-radiological-and-histological-evidence-of-cochlear-implant-insertion-trauma-in-adult-patients
#7
Emma Hoskison, Scott Mitchell, Chris Coulson
INTRODUCTION: Cochlear implantation (CI) has developed from its origins in the 1980s. Initially, CI was for profound bilateral hearing impairment. However, candidacy for CI have become more widespread in recent years with unilateral implantation and an emphasis on hearing preservation. Evidence supports full electrode insertion in an atraumatic fashion into the scala tympani (ST) provides optimal hearing outcomes. The main aim of this systematic review was to elucidate the degree of trauma associated with CI insertion...
May 23, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28448419/venous-sinus-thrombosis-in-blunt-trauma-incidence-and-risk-factors
#8
Shira E Slasky, Yayone Rivaud, Matthew Suberlak, Oluwole Tairu, Adam D Fox, Pamela Ohman-Strickland, Esther Bilinisky
PURPOSE: The aim of our study was to determine the incidence and risk factors of dural venous sinus thrombosis and epidural hemorrhage in the setting of a blunt trauma causing a calvarial fracture crossing a dural venous sinus. METHODS: A retrospective review of 472 blunt trauma patients with calvarial fracture crossing a dural venous sinus was performed. Two hundred ten patients who underwent computed tomography venography were identified and evaluated for the presence of dural venous sinus thrombosis and/or epidural hemorrhage...
April 26, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28414141/temporal-role-of-macrophages-in-cancellous-bone-healing
#9
Olof Helge Sandberg, Love Tätting, Magnus Erik Bernhardsson, Per Aspenberg
Macrophages are important phagocytosing and cytokine producing cells with effects on fracture healing. We used clodronate-containing liposomes to reduce the number of macrophages, in order to study their role in the early phases of cancellous bone healing. Holes were drilled bilaterally into the cancellous bone of the proximal metaphysis of the tibia of 60 mice. A screw was inserted in the hole in the right tibia. The day of surgery was day 0. Clodronate-containing liposomes were injected intraperitoneally as a single injection either day -4 or -1 (before surgery) or day 1 or 3 (after surgery)...
April 14, 2017: Bone
https://www.readbyqxmd.com/read/28397274/does-incidental-mastoid-opacification-on-computerized-tomography-necessitate-referral-to-ent
#10
Sophie L Wilkinson, Raguwinder S Sahota, James D Constable, Frazer Harper, Owen Judd
OBJECTIVE: The prevalence of incidental temporal bone disease on magnetic resonance imaging has been widely reported in the medical literature. Despite this, there currently is little evidence regarding incidental otological disease on computerized tomography (CT). Thus, the study aimed to review the CT prevalence of asymptomatic adult ear disease and evaluate the appropriateness of ear, nose, and throat (ENT) referral following its discovery. STUDY DESIGN: Retrospective observational study of 468 CT scans...
April 11, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28374140/revisiting-the-indirect-signs-of-a-temporal-bone-fracture-air-air-everywhere
#11
Adam C Ulano, Srinivasan Vedantham, Deepak Takhtani
BACKGROUND AND PURPOSE: The standard head CT protocol makes detection of a temporal bone fracture difficult. The purposes of our study are to revisit the finding of air in various locations around the temporal bone as an indirect sign of fracture and determine if findings could predict fracture pattern. MATERIALS AND METHODS: We searched the radiology reports for the keyword "temporal bone fracture." We recorded the presence of air in multiple locations around the temporal bone and pneumocephalus, opacification of the mastoid air cells or the middle ear cavity, and dominant fracture pattern...
April 3, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28314420/sport-injuries-of-the-ear-and-temporal-bone
#12
REVIEW
L Mariel Osetinsky, Grant S Hamilton, Matthew L Carlson
In cases of head trauma, the ear should be evaluated in all of its components. A good understanding of otologic and skull base anatomy enables a thorough trauma assessment of this complex anatomic region. Auricular laceration, abrasion, avulsion, hematoma, frostbite, otitis externa, exostosis, tympanic membrane perforation, ossicular discontinuity, perilymphatic fistula, labyrinthine concussion, temporal bone fracture, facial nerve paresis, and sensorineural hearing loss are a few of the more common otologic injuries seen in active patients...
April 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/28302380/surgical-timing-for-facial-paralysis-after-temporal-bone-trauma
#13
Peng Xu, Aiyan Jin, Baoqiang Dai, Ruijie Li, Yefeng Li
OBJECTIVES: To explore surgical timing of facial paralysis after temporal bone trauma. METHODS: The clinical data of the patients with facial paralysis after temporal bone trauma who underwent subtotal facial nerve decompression were retrospectively collected, and 80 cases followed-up for one year were enrolled in the study. They were divided into different subgroups according to the age, onset, and interval between facial paralysis and surgery, and the outcomes of facial nerve between different subgroups were compared...
May 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28298577/trauma-imaging-a-literature-review
#14
Jason Heath Vela, Christopher Ira Wertz, Kimberly L Onstott, Joss R Wertz
PURPOSE: To inform radiologic technologists about which imaging modalities and examinations are best suited for evaluating specific anatomical structures in patients who have sustained a traumatic injury. METHODS: Two scholarly research databases were searched to identify articles focused on trauma imaging of the head, cervical spine, thorax, abdomen, and pelvis. Articles focused on trauma diagnosis were excluded. Thirty-two articles were selected for analysis. DISCUSSION: Physical examination and plain-film radiographs typically are used to assess nasal bone fracures...
January 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28238160/insertion-forces-and-intracochlear-trauma-in-temporal-bone-specimens-implanted-with-a-straight-atraumatic-electrode-array
#15
Marjan Mirsalehi, Thomas S Rau, Lenka Harbach, Silke Hügl, Saleh Mohebbi, Thomas Lenarz, Omid Majdani
The aim of the study was to evaluate insertion forces during manual insertion of a straight atraumatic electrode in human temporal bones, and post-implantation histologic evaluation of the samples to determine whether violation of intracochlear structures is related to insertion forces. In order to minimize intracochlear trauma and preserve residual hearing during cochlear implantation, knowledge of the insertion forces is necessary. Ten fresh frozen human temporal bones were prepared with canal wall down mastoidectomy...
May 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28225319/cone-beam-computed-tomography-and-histological-evaluations-of-a-straight-electrode-array-positioning-in-temporal-bones
#16
Isabelle Mosnier, Charlotte Célérier, Jean-Loup Bensimon, Daniele de Seta, Olivier Sterkers, Yann Nguyen, Daniele Bernardeschi
CONCLUSION: CBCT allows a precise evaluation of the dimensions and of the shape of the cochlear duct that is of primary importance for the choice of the length and the design of the electrode array. This radio-histological study confirms that CBCT is a reliable tool to be used in clinical studies to evaluate the position of straight electrode arrays within the cochlear scala. OBJECTIVE: To validate the reliability of cone beam computed tomography (CBCT) in the evaluation of cochlear anatomy and positioning of a straight electrode array, by comparing radiological images to histological analysis of cochlear implanted temporal bones...
March 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28216124/the-pattern-and-degree-of-capsular-fibrous-sheaths-surrounding-cochlear-electrode-arrays
#17
Reuven Ishai, Barbara S Herrmann, Joseph B Nadol, Alicia M Quesnel
An inflammatory tissue reaction around the electrode array of a cochlear implant (CI) is common, in particular at the electrode insertion region (cochleostomy) where mechanical trauma often occurs. However, the factors determining the amount and causes of fibrous reaction surrounding the stimulating electrode, especially medially near the perimodiolar location, are unclear. Temporal bone (TB) specimens from patients who had undergone cochlear implantation during life with either Advanced Bionics (AB) Clarion ™ or HiRes90K™ (Sylmar, CA, USA) devices that have a half-band and a pre-curved electrode, or Cochlear ™ Nucleus (Sydney, Australia) device that have a full-band and a straight electrode were evaluated...
May 2017: Hearing Research
https://www.readbyqxmd.com/read/28124635/clinical-features-and-radiological-evaluation-of-otic-capsule-sparing-temporal-bone-fractures
#18
S W Song, B C Jun, H Kim
OBJECTIVE: To evaluate the clinical and radiological aspects of otic capsule sparing temporal bone fractures. METHODS: Using medical records, 188 temporal bones of 173 patients with otic capsule sparing temporal bone fractures were evaluated. Otoscopic findings and symptoms, facial paralysis, and hearing loss were assessed. RESULTS: Using regional analysis, 7 fractures were classified as type I, 85 as type II, 169 as type III and 114 as type IV...
March 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28114180/is-serial-electroneuronography-indicated-following-temporal-bone-trauma
#19
Aaron Kyle Remenschneider, Suzanne Michalak, Elliott D Kozin, Samuel Barber, Ronald K De Venecia, Tessa A Hadlock, David H Jung
OBJECTIVE: Contemporary guidelines advise facial nerve (FN) decompression within 2 weeks of temporal bone trauma if a single electroneuronography (ENoG) demonstrates more than 90% degeneration of the FN. We report a case series demonstrating the potential of serial ENoG to guide FN management more than 2 weeks following injury. PATIENTS: Adults with traumatic temporal bone fractures and resultant ipsilateral FN paresis. INTERVENTION: Serial ENoG followed by observation or decompression of the FN...
April 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28099983/-the-relevance-of-abducent-nerve-palsy-in-ent
#20
Veit Maria Hofmann, Stephan M Niehues, Annett Pudszuhn
Patients suffering from abducent nerve palsy are usually primary seen by a conservative medical Specialist. In most cases the ENT specialist is secondary involved for treatment. In the majority of cases abducent nerve palsy is a temporary symptom associated with neurologic or vascular diseases. Rarely inflammation, neoplasm or fracture of the skull base cause this symptom and lead to an intervention done by the ENT surgeon. This case series describes retrospectively the abducent palsy seen through the eyes of an ENT surgeon...
May 2017: Laryngo- Rhino- Otologie
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