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Tympanic membrane rupture

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https://www.readbyqxmd.com/read/28868602/ruptured-tympanic-membrane-from-underwater-impact-with-an-atlantic-salmon-salmo-salar
#1
David Smart
An unusual case of tympanic membrane rupture in a diver due to impact from an Atlantic salmon, Salmo salar is described. The diver was treated conservatively and the injury fully healed by eight weeks after which the diver successfully returned to diving. The author contends that the appearances of such traumatic perforations differ from barotrauma in divers secondary to ear clearing problems on descent.
September 2017: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/28866319/the-effect-of-blast-overpressure-on-the-mechanical-properties-of-a-chinchilla-tympanic-membrane
#2
Junfeng Liang, Zachery A Yokell, Don U Nakmaili, Rong Z Gan, Hongbing Lu
The rupture of tympanic membrane (TM) has long been viewed as an indicator of blast injury, especially for hearing loss. However, little is known about damage to the TM caused by blast with pressure lower than the rupture threshold. In this paper, we present our study on the effect of blast overpressure on the static mechanical properties of TM. Chinchilla was used as the animal model and exposed to multiple blasts with pressures lower than the rupture threshold of the TM. Using a micro-fringe projection method, we observed the alteration of the static mechanical properties of post-blast chinchilla's TMs as compared to those of control TMs...
August 18, 2017: Hearing Research
https://www.readbyqxmd.com/read/28726587/repair-of-tympanic-membrane-perforations-with-customized-bioprinted-ear-grafts-using-chinchilla-models
#3
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 3-5% 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% and 100%...
September 1, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28692592/reduction-in-temporary-and-permanent-audiological-injury-through-internal-jugular-vein-compression-in-a-rodent-blast-injury-model
#4
Brian Sindelar, Michael Shinners, Sydney Sherman, Kristine Erickson, Vimal Patel, Paul Kubilis, John D Finan, Julian E Bailes
HYPOTHESIS: Internal jugular vein (IJV) compression influences not only intracranial but also intracochlear physiology and has demonstrated preclinical effectiveness in reducing acute audiological injury in a rodent blast model. However, the long-term effects in this model are unknown. BACKGROUND: Blast wave-induced audiological injury from an improvised explosive device is a leading cause of morbidity among service members in theater but there are limitations to the current protective measures...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28634733/dynamic-properties-of-human-tympanic-membrane-after-exposure-to-blast-waves
#5
Warren G Engles, Xuelin Wang, Rong Z Gan
Blast overpressure causes dynamic damage to middle ear components, and tympanic membrane (TM) rupture is the most frequent middle ear injury. However, it is unclear how the blast waves change mechanical properties of the TM and affect sound transmission through the ear. This paper reports the current study on dynamic properties of the TM after exposure to blast waves by using acoustic loading and laser Doppler vibrometry (LDV). The TM specimens were prepared from human temporal bones following exposures to blast overpressure...
June 20, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28467585/variations-in-otological-presentation-of-lightning-strike-victims-clinical-report-of-3-patients
#6
Erbil Kılıç, Hakan Genç, Ümit Aydın, Burak Aşık, Bülent Satar
Lightning strike can cause fatal or nonfatal injuries. Some nonfatal injuries are associated with otological symptoms and findings. Conductive hearing loss due to rupture of the tympanic membrane is the most common audiovestibular lesion of lightning strike. Various forms of sensorineural hearing loss and dizziness have also been reported. Presently described are 3 cases of lightning strike injury. First patient had mid-frequency hearing loss in right ear and high frequency sensorineural hearing loss in left ear...
March 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28087317/acute-otitis-media-caused-by-streptococcus-pneumoniae-serotype-19a-st320-clone-epidemiological-and-clinical-characteristics
#7
Hsin Chi, Nan-Chang Chiu, Fu-Yuan Huang, Chyong-Hsin Hsu, Kuo-Sheng Lee, Li-Min Huang, Yu-Chia Hsieh
BACKGROUND: Streptococcus pneumoniae serotype 19A ST320, a highly multiresistant and virulent clone, has emerged as a common pathogen causing acute otitis media (AOM) in children. METHODS: Patients aged 0-18 years with AOM who presented at Mackay Memorial Hospital, Taipei, Taiwan were prospectively enrolled between December 1, 2009, and November 30, 2012. For each patient, a specimen of middle-ear fluid was obtained and cultured. S. pneumoniae isolates were tested by serotyping, antibiotic-resistance profiling, and multilocus sequence typing...
December 19, 2016: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/27012610/reduced-sensory-stimulation-alters-the-molecular-make-up-of-glutamatergic-hair-cell-synapses-in-the-developing-cochlea
#8
M Barclay, R Constable, N R James, P R Thorne, J M Montgomery
Neural activity during early development is known to alter innervation pathways in the central and peripheral nervous systems. We sought to examine how reduced sound-induced sensory activity in the cochlea affected the consolidation of glutamatergic synapses between inner hair cells (IHC) and the primary auditory neurons as these synapses play a primary role in transmitting sound information to the brain. A unilateral conductive hearing loss was induced prior to the onset of sound-mediated stimulation of the sensory hair cells, by rupturing the tympanic membrane and dislocating the auditory ossicles in the left ear of P11 mice...
June 14, 2016: Neuroscience
https://www.readbyqxmd.com/read/26959613/imaging-features-of-blast-injuries-experience-from-2015-ankara-bombing-in-turkey
#9
Cisel Yazgan, Nalan M Aksu
OBJECTIVE: To present the radiological features of blast-related injuries in the victims of the 10 October 2015 Ankara bombing and emphasize the importance of imaging. METHODS: This retrospective descriptive study included a total of 28 patients who underwent CT scan or radiographic imaging within 6 h after the bombing on 10 October 2015. CT scans and plain radiographs were evaluated regarding mechanisms of injuries. Injuries were categorized as primary, secondary, tertiary and quaternary...
June 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/26906669/a-case-of-tannerite-%C3%A2-target-mixture-causing-severe-blast-injury
#10
Ryan E Rebowe, Patrick Harbour, Jeffrey E Carter, Joseph Andrew Molnar
Tannerite(®) is a proprietary blend of an oxidizer, ammonium nitrate, and aluminum powder catalyst used to make homemade exploding targets. While it is currently approved for unrestricted sale in the United States, it can be used to form devices capable of inflicting major blast injury. We present here a case of close proximity exposure to detonation of the mixed Tannerite(®) blend. In our patient, the exposure lead to injuries typical of blast injury, such as tympanic membrane rupture, globe injury, and severe burns...
June 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/26807796/mechanical-damage-of-tympanic-membrane-in-relation-to-impulse-pressure-waveform-a-study-in-chinchillas
#11
Rong Z Gan, Don Nakmali, Xiao D Ji, Kegan Leckness, Zachary Yokell
Mechanical damage to middle ear components in blast exposure directly causes hearing loss, and the rupture of the tympanic membrane (TM) is the most frequent injury of the ear. However, it is unclear how the severity of injury graded by different patterns of TM rupture is related to the overpressure waveforms induced by blast waves. In the present study, the relationship between the TM rupture threshold and the impulse or overpressure waveform has been investigated in chinchillas. Two groups of animals were exposed to blast overpressure simulated in our lab under two conditions: open field and shielded with a stainless steel cup covering the animal head...
October 2016: Hearing Research
https://www.readbyqxmd.com/read/26759161/tympanic-membrane-rupture-during-robotic-assisted-laparoscopic-prostatectomy
#12
LETTER
David A Maerz, Daniel M Gainsburg
No abstract text is available yet for this article.
June 2016: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/26681945/ceruminous-adenoma-of-the-external-auditory-canal-a-case-report-with-imaging-and-pathologic-findings
#13
George Psillas, Argyrios Krommydas, Georgia Karayannopoulou, Kyriakos Chatzopoulos, Jean Kanitakis, Konstantinos Markou
Ceruminous adenomas are benign tumors that are rare in humans and present with a nonspecific symptomatology. The treatment of choice is surgical excision. We present an 87-year-old woman who presented with a reddish, tender, round, soft mass of the outer third of the inferior wall of the left external auditory canal, discharging a yellowish fluid upon pressure. Coincidentally, due to her poor general condition, this patient also showed symptoms consistent with chronic otitis media, parotitis, and cervical lymphadenopathy, such as otorrhea, through a ruptured tympanic membrane and swelling of the parotid gland and cervical lymph nodes...
2015: Case Reports in Medicine
https://www.readbyqxmd.com/read/26152108/the-o-neill-grading-system-for-evaluation-of-the-tympanic-membrane-a-practical-approach-for-clinical-hyperbaric-patients
#14
Owen J O'Neill, Erica D Weitzner
Eustachian tube dysfunction (ETD) and middle ear barotrauma (MEB) are the two most common complications of clinical hyperbaric oxygen (HBO2) treatment. The current grading system, the Teed's Classification, was first described in 1944 with modifications to this system over the years, but none are specific for the evaluation and treatment of patients undergoing clinical HBO2 therapy. Currently, the standard of care is a baseline otoscopic examination performed prior to starting HBO2 therapy. Repeat otoscopy is required for patients having ETD, pain or other symptoms during the compression and/or decompression phase of the treatment...
May 2015: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/25169065/bacterial-spectrum-of-spontaneously-ruptured-otitis-media-in-the-era-of-pneumococcal-conjugate-vaccination-in-germany
#15
MULTICENTER STUDY
Mark van der Linden, Matthias Imöhl, Andreas Busse, Markus Rose, Dieter Adam
UNLABELLED: Otitis media is a common pediatric disease and the main reason for antibiotic prescription in children. Before implementation of routine childhood pneumococcal vaccination in Germany, serotypes contained in the seven-valent pneumococcal conjugate vaccine (PCV) were among the most frequent pneumococcal serotypes responsible for acute otitis media (AOM). This report describes the first 3 years of a prospective, multicenter, epidemiological cross-sectional study examining the bacteriology of middle ear fluids (MEF) and nasopharyngeal swabs (NPS) of children 2 months to 5 years of age with spontaneously perforated AOM in the era of routine pneumococcal vaccination...
March 2015: European Journal of Pediatrics
https://www.readbyqxmd.com/read/25111525/a-lightning-strike-causing-a-cholesteatoma-a-unique-form-of-otologic-blast-injury
#16
Nicholas J Scalzitti, Travis J Pfannenstiel
OBJECTIVE: We present a case of a middle-aged male struck by lightning while walking in a parking lot. Assessment of the patient's injuries demonstrated common sequelae of an otologic blast injury. Review of this case should prepare the otolaryngologist to identify and manage otologic blast injuries regardless of their etiology. METHODS: Case study and literature review CASE REPORT: The patient presented to a level 1 trauma and burn center with a ruptured tympanic membrane, otalgia, mixed hearing loss, dizziness, and tinnitus...
December 2014: Otology & Neurotology
https://www.readbyqxmd.com/read/24881151/diagnostic-imaging-of-peripheral-vestibular-disease-in-a-chinese-goose-anser-cygnoides
#17
Katie W Delk, Johanna Mejia-Fava, David A Jiménez, Marc Kent, Kathern Myrna, Joerg Mayer, Stephen Divers
A 20-year-old Chinese goose (Anser cygnoides) presented for severe left-sided head tilt and circling to the left. Peripheral vestibular disease associated with otitis media extending into the left quadrate bone was diagnosed by magnetic resonance imaging and computed tomography. Otoscopy confirmed a ruptured tympanic membrane, and a brainstem auditory evoked response test confirmed loss of hearing in the affected ear. Surgery to remove the caseous material and long-term medical therapy improved the bird's head tilt and quality of life...
March 2014: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/24653882/mechanisms-and-treatment-of-blast-induced-hearing-loss
#18
REVIEW
Chul-Hee Choi
The main objective of this study is to provide an overview of the basic mechanisms of blast induced hearing loss and review pharmacological treatments or interventions that can reduce or inhibit blast induced hearing loss. The mechanisms of blast induced hearing loss have been studied in experimental animal models mimicking features of damage or injury seen in human. Blast induced hearing loss is characterized by perforation and rupture of the tympanic membrane, ossicular damage, basilar membrane damage, inner and outer hair cell loss, rupture of round window, changes in chemical components of cochlear fluid, vasospasm, ischemia, oxidative stress, excitotoxicity, hematoma, and hemorrhage in both animals and humans...
December 2012: Korean Journal of Audiology
https://www.readbyqxmd.com/read/24614424/barotrauma-with-extreme-pressures-in-sport-from-scuba-to-skydiving
#19
REVIEW
James H Lynch, Travis G Deaton
The human body is well adapted to dealing with small variations in atmospheric pressure. However when our pursuit of sport and recreation takes us to extreme altitudes or ocean depths, the change in surrounding pressure has the potential to cause significant morbidity. Sports with more extreme changes in atmospheric pressure such as skydiving and scuba diving commonly place the athlete at risk for barotrauma injuries, especially in the middle ear and sinuses. Middle ear barotrauma occurs when a pressure differential develops between the middle ear and the pressure outside of the tympanic membrane...
March 2014: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/24270726/magnetic-resonance-imaging-of-the-middle-and-inner-ear-after-intratympanic-injection-of-a-gadolinium-containing-gel
#20
Cecilia Engmér Berglin, Göran Laurell, Tobias Bramer, Katarina Edsman, S Allen Counter, Tomas Klason, Andreas Ekborn
OBJECTIVE: To investigate the distribution and elimination of a gadolinium containing high viscosity formulation of sodium hyaluronan (HYA gel) after injection to the middle ear. MATERIALS AND METHODS: The T1 contrast agent gadolinium-diethylenetriamine pentaacetic acid-bis methylamine (Gd-DTPA-BMA) was added to HYA gel and delivered to the middle ear of 13 albino guinea pigs by 3 different ways of injection. Magnetic resonance imaging was performed with a 4.7 T MRI system using a T1-weighted 3-dimentional rapid acquisition with relaxation enhancement sequence...
March 2014: Otology & Neurotology
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