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https://www.readbyqxmd.com/read/28314420/sport-injuries-of-the-ear-and-temporal-bone
#1
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/28306652/tests-of-eustachian-tube-function-the-effect-of-testing-technique-on-tube-opening-in-healthy-ears
#2
Matthew E Smith, Andrew J C Blythe, Charlotte Baker, Charlie C Zou, Peter J A Hutchinson, James R Tysome
OBJECTIVE: There is no agreement on the best clinical test for Eustachian tube (ET) dysfunction. Numerous tests have been developed to detect ET opening, and all require a patient to perform a Valsalva, Toynbee or sniff maneuver, or to swallow on demand. We aimed to characterize existing tests of ET function in healthy ears, and identify the optimal method and patient maneuver for each test. Our own normative data is presented alongside published comparisons. STUDY DESIGN: Diagnostic test cohort study...
March 16, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28304079/endoscope-or-microscope-guided-pediatric-tympanoplasty-comparison-of-grafting-technique-and-outcome
#3
Adrian L James
OBJECTIVES/HYPOTHESIS: To review experience from the introduction of totally endoscopic ear surgery (TEES) to a pediatric tympanoplasty practice to identify factors influencing technique selection and successful outcome. STUDY DESIGN: Prospective cohort study. METHODS: Analysis of prospectively acquired data from a consecutive series of 295 surgeries for tympanic membrane perforation over a 12-year period. Success of perforation closure was compared between microscope and TEES grafting techniques...
March 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28298611/frequency-tuning-and-directional-sensitivity-of-tympanal-vibrations-in-the-field-cricket-gryllus-bimaculatus
#4
Martin J Lankheet, Uroš Cerkvenik, Ole N Larsen, Johan L van Leeuwen
Female field crickets use phonotaxis to locate males by their calling song. Male song production and female behavioural sensitivity form a pair of matched frequency filters, which in Gryllus bimaculatus are tuned to a frequency of about 4.7 kHz. Directional sensitivity is supported by an elaborate system of acoustic tracheae, which make the ears function as pressure difference receivers. As a result, phase differences between left and right sound inputs are transformed into vibration amplitude differences. Here we critically tested the hypothesis that acoustic properties of internal transmissions play a major role in tuning directional sensitivity to the calling song frequency, by measuring tympanal vibrations as a function of sound direction and frequency...
March 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28298177/tympanic-membrane-organ-culture-using-cell-culture-well-inserts-engrafted-with-tympanic-membrane-tissue-explants
#5
Lawrence J Liew, Richard M Day, Rodney J Dilley
Tissue engineering approaches using growth factors and various materials for repairing chronic perforations of the tympanic membrane are being developed, but there are surprisingly few relevant tissue culture models available to test new treatments. Here, we present a simple three-dimensional model system based on micro-dissecting the rat tympanic membrane umbo and grafting it into the membrane of a cell culture well insert. Cell outgrowth from the graft produced sufficient cells to populate a membrane of similar surface area to the human tympanic membrane within 2 weeks...
March 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28294080/outcome-and-cost-analysis-of-bilateral-sequential-same-day-cartilage-tympanoplasty-compared-with-bilateral-staged-tympanoplasty
#6
A D Olusesi, O Oyeniran
BACKGROUND: Few studies have compared bilateral same-day with staged tympanoplasty using cartilage graft materials. METHODS: A prospective randomised observational study was performed of 38 chronic suppurative otitis media patients (76 ears) who were assigned to undergo bilateral sequential same-day tympanoplasty (18 patients, 36 ears) or bilateral sequential tympanoplasty performed 3 months apart (20 patients, 40 ears). Disease duration, intra-operative findings, combined duration of surgery, post-operative graft appearance at 6 weeks, post-operative complications, re-do rate and relative cost of surgery were recorded...
March 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28289315/wrinkling-of-tympanic-membrane-under-unbalanced-pressure
#7
Bo Wang, Pravarsha Ghanta, Sandra Vinnikova, Siyuan Bao, Junfeng Liang, Hongbing Lu, Shuodao Wang
Mechanics of tympanic membrane (TM) is crucial for investigating the acoustic transmission through the ear. In this study, we studied the wrinkling behavior of tympanic membrane when it is exposed to mismatched air pressure between the ambient and the middle ear. The Rayleigh-Ritz method is adopted to analyze the critical wrinkling pressure and the fundamental eigenmode. An approximate analytical solution is obtained and validated by finite element analysis (FEA). The model will be useful in future investigations on how the wrinkling deformation of the TM alters the acoustic transmission function of the ear...
April 2017: Journal of Applied Mechanics
https://www.readbyqxmd.com/read/28288478/benign-temporomandibular-joint-lesions-presenting-as-masses-in-the-external-auditory-canal
#8
Ryan A Williams, Robert K Jackler, C Eduardo Corrales
OBJECTIVE: Describe benign lesions arising from the temporomandibular joint (TMJ) that presented as masses in the external auditory canal (EAC). STUDY DESIGN: Retrospective case series of two academic medical centers. PATIENTS: Six patients with lesions emanating from the TMJ that presented as EAC masses. Lesions included pigmented villonodular synovitis (PVNS), nodular fasciitis, foramen of Huschke herniation with salivary fistula, fibroepithelial polyp, superficial angiomyxoma, and giant cell tumor (GCT)...
April 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28283126/environmental-heat-stress-among-young-working-women-a-pilot-study
#9
Juma Rahman, S H M Fakhruddin, A K M Fazlur Rahman, M A Halim
BACKGROUND: Heat waves are increasing significantly in frequency and severity and threaten the health and income of outdoor workers. Pregnant women workers are particularly at risk due to their delicate physiological systems and accountabilities to future generations. Animal and human studies propose that elevated body temperatures during pregnancy can induce adverse pregnancy outcomes. OBJECTIVE: To measure the change in internal body temperature (Tcore) in young working women before, after, and during work (both outdoor and indoor) on hot humid days and relate threshold temperature to the upshot adverse effects of pregnancy (teratogenicity and related miscarriage)...
September 2016: Annals of Global Health
https://www.readbyqxmd.com/read/28279741/enhanced-non-invasive-trans-tympanic-delivery-of-ciprofloxacin-through-encapsulation-into-nano-spanlastic-vesicles-fabrication-in-vitro-characterization-and-comparative-ex-vivo-permeation-studies
#10
Abdulaziz Mohsen Al-Mahallawi, Omneya Mohammed Khowessah, Raguia Ali Shoukri
The aim of this research was to encapsulate ciprofloxacin, a broad spectrum fluoroquinolone antibiotic, into Span 60 based nano-elastic vesicles, nano-spanlastics, for accomplishing improved non invasive trans-tympanic delivery, providing means for ototopical treatment of acute otitis media (AOM). To achieve this purpose, ciprofloxacin-loaded nano-spanlastics were prepared by thin film hydration (TFH) technique, using several non-ionic edge activators (EAs) according to full factorial design (3(2)). The investigation of the effect of formulation variables on nano-spanlastic characteristics and selection of the optimum formula were performed using Design-Expert(®) software...
March 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28277483/endoscopy-assisted-ear-surgery-for-treatment-of-chronic-otitis-media-with-cholesteatoma-adhesion-or-retraction-pockets
#11
Cagatay Han Ulku
The objective of this study was to analyze the results of endoscopy-assisted ear surgery for the treatment of chronic otitis media with cholesteatoma, adhesion, or retraction pockets.Fifty-one patients who underwent oto-endoscopy-assisted canal wall up tympanomastoid surgery and/or limited anterior atticotomy with tympanoplasty for chronic otitis media with cholesteatoma, adhesion, or retraction pocket from 2006 to 2013 have been included in this study. Eradication of the disease from the middle ear and mastoid air cells was achieved by combination of the oto-microscobic and oto-endoscopic approaches...
March 8, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28274901/a-comparison-study-of-partial-ossicular-reconstruction-prosthesis-porp-placement-under-the-malleus-or-tympanic-membrane-graft-in-the-presence-of-the-malleus
#12
Ahmet Mutlu, Özlem Topdağ, Murat Topdağ, Mete İşeri, Selvet Erdoğan
OBJECTIVE: The aim of this study was to compare the hearing results of embedding the partial ossicular reconstruction prosthesis (PORP) underneath the malleus with the malleus relocation technique and tympanic membrane graft in the presence of the malleus. MATERIALS AND METHODS: A retrospective review of patient charts and audiometric results in a tertiary referral center was conducted. In total, 83 patients who underwent intact canal tympanoplasty with mastoidectomy between 2010 and 2015 were included and divided into two different groups: malleus assembly to the stapes head (MASH) and tympanic membrane assembly to the stapes head (TASH)...
March 9, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28273957/morphological-variations-of-middle-ear-ossicles-and-its-clinical-implications
#13
Ritaban Saha, Phalguni Srimani, Ardhendu Mazumdar, Sibani Mazumdar
INTRODUCTION: The middle ear ossicles form a semi rigid chain in the middle of the ear for conduction and amplification of sound waves from the tympanic membrane to the inner ear. Although, our knowledge of the ear ossicles dates back to the 15(th) century, and various studies have been carried out on their morphometry, morphology, anomalies, embryology, function and structure throughout the world, information about the morphology of middle ear ossicles is meagre in Indian subjects. AIM: To find out the morphological variations of middle ear ossicles of right and left sides...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28270971/multifrequency-swept-optical-coherence-microscopy-for-highspeed-full-field-tomographic-vibrometry-in-biological-tissues
#14
Samuel Choi, Keita Sato, Takeru Ota, Fumiaki Nin, Shogo Muramatsu, Hiroshi Hibino
Because conventional laser Doppler vibrometry or Doppler optical coherence tomography require mechanical scanning probes that cannot simultaneously measure the wide-range dynamics of bio-tissues, a multifrequency-swept optical coherence microscopy with wide-field heterodyne detection technique was developed. A 1024 × 1024 × 2000 voxel volume was acquired with an axial resolution of ~1.8 μm and an acquisition speed of 2 s. Vibration measurements at 10 kHz were performed over a wide field of view. Wide-field tomographic vibration measurements of a mouse tympanic membrane are demonstrated to illustrate the applicability of this method to live animals...
February 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28264274/a-new-species-of-i-phyllodytes-i-wagler-1830-anura-hylidae-from-the-atlantic-forest-of-southern-bahia-brazil
#15
Euvaldo Marciano-Jr, Amanda Santiago F Lantyer-Silva, Mirco Solé
We describe a new species of Phyllodytes from Ilhéus (15º04'S, 39º03'W; 95 m above sea level), south of state of Bahia, in the northeastern Atlantic Forest of Brazil. Phyllodytes megatympanum sp. nov. is diagnosable by the following combination of characters: (1) dorsum of body, arms, and legs uniformly light brown; (2) groin yellow; (3) snout pointed in dorsal view, protruding in profile; (4) tympanum large with a round distinct tympanic annulus; (5) adult males with two anterior large odontoids followed by a series of smaller odontoids on each side of the mandible; (6) well-developed tubercle near tibio-tarsal joint; (7) advertisement call composed of a series of 12 to 19 unpulsed notes, with harmonic structure and (8) mean dominant frequency of 3...
March 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28252592/-the-application-of-the-modern-high-energy-laser-technologies-for-the-surgical-treatment-of-the-patients-presenting-with-otosclerosis
#16
V V Vishnyakov, V M Svistushkin, E V Sin'kov
The objective of the present study was to determine the optimal parameters of radiation of the CO2 laser during the surgical intervention for the treatment of the patients presenting with otosclerosis. The experimental part of the study was carried out with the use of the isolated temporal bones. Under the clinical conditions, the patients with the tympanic and mixed forms of otosclerosis underwent stapedoplasty with the use of the CO2 laser. It was shown that the use of the CO2 laser at different stages of stapedoplasty considerably reduces the risk of development of the post-operative complications...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28252591/-the-application-of-the-method-of-radiofrequency-myringotomy-under-the-experimental-conditions-and-in-the-clinical-practice
#17
V M Svistushkin, A V Zolotova, O D Smirnova, G N Nikiforova
Exudative otitis media is a widespread pathological condition in the human population. In the recent years, the treatment with the electric current having the frequency up to 3.8 MHz has found the increasingly frequent application, in addition to shunting and laser myringotomy, for the perforation of the tympanic membrane to facilitate removal of exudate. The objective of the present study was to evaluate the effectiveness of the application of the electric current with the frequency up to 4 MHz for myringotomy in the patients presenting with exudative otitis media under the experimental conditions and in the clinical practice...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28243783/acoustic-schwannoma-with-intracochlear-extension-and-primary-intracochlear-schwannoma-removal-through-translabyrinthine-approach-with-facial-bridge-cochleostomy-and-transcanal-approach
#18
A Mazzoni, E Zanoletti, C Faccioli, A Martini
Intracochlear schwannomas can occur either as an extension of a larger tumor from the internal auditory canal, or as a solitary labyrinthine tumor. They are currently removed via a translabyrinthine approach extended to the basal turn, adding a transotic approach for tumors lying beyond the basal turn. Facial bridge cochleostomy may be associated with the translabyrinthine approach to enable the whole cochlea to be approached without sacrificing the external auditory canal and tympanum. We describe seven cases, five of which underwent cochlear schwannoma resection with facial bridge cochleostomy, one case with the same procedure for a suspect tumor and one, previously subjected to radical tympanomastoidectomy, who underwent schwannoma resection via a transotic approach...
February 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28240982/inner-ear-excitation-in-normal-and-postmastoidectomy-participants-by-fluid-stimulation-in-the-absence-of-air-and-bone-conduction-mechanisms
#19
Ofri Ronen, Miriam Geal-Dor, Michal Kaufmann-Yehezkely, Ronen Perez, Shai Chordekar, Cahtia Adelman, Haim Sohmer
BACKGROUND: Hearing can be induced not only by airborne sounds (air conduction [AC]) and by the induction of skull vibrations by a bone vibrator (osseous bone conduction [BC]), but also by inducing vibrations of the soft tissues of the head, neck, and thorax. This hearing mode is called soft tissue conduction (STC) or nonosseous BC. PURPOSE: This study was designed to gain insight into the mechanism of STC auditory stimulation. RESEARCH DESIGN: Fluid was applied to the external auditory canal in normal participants and to the mastoidectomy common cavity in post-radical mastoidectomy patients...
February 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28239575/observations-on-tympanic-membrane-perforations-safe-type-and-hearing-loss
#20
Sushil Gaur, O N Sinha, Ashesh Bhushan, Gaurav Batni
The most commonly observed clinical findings in otological practice is discharging ear in which perforation of the tympanic membrane is the commonest, yet the patients hardly ever seek advice for deafness as the presenting symptom. In patients with the symptoms of ear ache or ear discharge when relieved seldom present for follow up and are not very much concerned about the hearing loss present there. There is a different correlation between surface area of tympanic membrane and amplification of sound. Conductive hearing loss is seen in lower tones than higher tones...
March 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
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