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https://www.readbyqxmd.com/read/27910733/a-comparative-morphologic-and-morphometric-study-about-geniculate-ganglion-development-in-man-and-in-rat
#1
Ana Sánchez-Del-Rey, José Maria Sánchez-Fernández, Arantza Ibargutxi, Agustin Martinez-Ibargüen, Francisco Santaolalla
CONCLUSIONS: Human-rat geniculate ganglion (GG) have multiple origins: (1) An initial proximity (20 μm) to the endocranial foramen of the IAM, suggests neural crest induction; and (2) The influence of epibranchial placodes: the tensor tympani muscle (TTM) and the otic apical coil. OBJECTIVES: This study was undertaken to determine the comparative development of human-rat GG. MATERIALS AND METHODS: A light microscopic study of the GG in human material obtained from spontaneous abortions at 9, 13, 14, 17, 18, and 30 weeks, and one neonate was done...
December 2, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27898607/effects-of-intratympanic-dexamethasone-on-high-dose-radiation-ototoxicity-in-vivo
#2
Christine T Dinh, Si Chen, John Dinh, Stefania Goncalves, Esperanza Bas, Kyle Padgett, Perry Johnson, Nagy Elsayyad, Fred Telischi, Thomas Van De Water
BACKGROUND: Stereotactic radiosurgery for lateral skull base tumors can cause hearing loss when the cochleae are exposed to high doses of single-fraction radiation. Currently, there are no known nondosimetric preventative treatments for radiation-induced ototoxicity. HYPOTHESIS: Intratympanic (IT) dexamethasone (DXM), a synthetic steroid, protects against radiation-induced auditory hair cell (HC) and hearing losses in rats in vivo. METHODS: Seven rats received radiation (12 Gy) to both cochleae...
November 24, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27897128/defining-the-limits-of-endoscopic-access-to-internal-auditory-canal
#3
Adam Master, Mickie Hamiter, Maura Cosetti
OBJECTIVE: To quantify surgical access to the internal auditory canal (IAC) using an exclusively endoscopic transcanal approach (EETA) and investigate surgically relevant relationships with neurovascular and osseous landmarks of the temporal bone. MATERIALS AND METHODS: Anatomical dissection of two paired temporal bones and 15 unpaired temporal bones was performed using an exclusively endoscopic approach to IAC. The dissection proceeded until the cerebellopontine angle (CPA) could be accessed...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27896803/the-effect-of-craniokinesis-on-the-middle-ear-of-domestic-chickens-gallus-gallus-domesticus
#4
Raf Claes, Pieter G G Muyshondt, Luc Van Hoorebeke, Jelle Dhaene, Joris J J Dirckx, Peter Aerts
The avian middle ear differs from that of mammalians and contains a tympanic membrane, one ossicle (bony columella and cartilaginous extra-columella), some ligaments and one muscle. The rim of the eardrum (closing the middle ear cavity) is connected to the neurocranium and, by means of a broad ligament, to the otic process of the quadrate. Due to the limited number of components in the avian middle ear, the possibilities of attenuating the conduction of sound seem to be limited to activity of the stapedius muscle...
November 29, 2016: Journal of Anatomy
https://www.readbyqxmd.com/read/27896001/long-range-wide-field-swept-source-optical-coherence-tomography-with-gpu-accelerated-digital-lock-in-doppler-vibrography-for-real-time-in-vivo-middle-ear-diagnostics
#5
Dan MacDougall, Joshua Farrell, Jeremy Brown, Manohar Bance, Robert Adamson
We present the design, implementation and validation of a swept-source optical coherence tomography (OCT) system for real-time imaging of the human middle ear in live patients. Our system consists of a highly phase-stable Vernier-tuned distributed Bragg-reflector laser along with a real-time processing engine implemented on a graphics processing unit. We use the system to demonstrate, for the first time in live subjects, real-time Doppler measurements of middle ear vibration in response to sound, video rate 2D B-mode imaging of the middle ear and 3D volumetric B-mode imaging...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27895872/investigation-of-factors-affecting-body-temperature-changes-during-routine-clinical-head-magnetic-resonance-imaging
#6
Myeong Seong Kim
BACKGROUND: Pulsed radiofrequency (RF) magnetic fields, required to produce magnetic resonance imaging (MRI) signals from tissue during the MRI procedure have been shown to heat tissues. OBJECTIVES: To investigate the relationship between body temperature rise and the RF power deposited during routine clinical MRI procedures, and to determine the correlation between this effect and the body's physiological response. PATIENTS AND METHODS: We investigated 69 patients from the Korean national cancer center to identify the main factors that contribute to an increase in body temperature (external factors and the body's response) during a clinical brain MRI...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27895351/frequency-of-sensorineural-hearing-loss-in-chronic-suppurative-otitis-media
#7
Syed Sajjad Ali Zaidi, Hamdan Ahmed Pasha, Anwar Suhail, Talha Ahmed Qureshi
Chronic suppurative otitis media (CSOM) is defined as chronic otorrhea (i.e., lasting > 6-12 weeks) through a perforated tympanic membrane. It is generally associated with some degree of conductive hearing loss. However, recurrent ear infections due to perforated eardrum result in absorption of toxins and macromolecules into the cochlea leading to sensorineural hearing loss (SNHL). We planned to determine the frequency of sensorineural hearing loss in chronic suppurative otitis media. A descriptive cross-sectional study was conducted at Aga Kgan University Hospital, Karachi, from October 2013 to March 2014...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27895002/impression-material-in-the-external-and-middle-ear-an-overview-of-the-literature-and-a-stepwise-approach-for-removal
#8
Froukje Verdam, Rinze Tange, Hans Thomeer
Here, we provide a literature overview of cases with protruding molding material for earplugs or hearing aids and subsequent required treatment, including our own cases. Patients at risk are those with impaired tympanic membranes or who previously underwent otologic surgery. Symptoms such as otalgia, tinnitus, and vertigo are alarming but do not always arise. In case of doubt, a CT scan is of additive value to prepare for adequate surgical removal and to limit potential damage. A stepwise approach for the clinician on how to address these challenging cases is presented, based upon the literature and our own experience...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27895000/severe-acute-otitis-media-and-acute-mastoiditis-in-adults
#9
Anu Laulajainen Hongisto, Jussi Jero, Antti Markkola, Riste Saat, Antti A Aarnisalo
OBJECTIVE: To evaluate and compare clinical and microbiological findings in adults hospitalized for acute otitis media (AOM) or mastoid infections (acute or latent). MATERIALS AND METHODS: We retrospectively reviewed the medical records of all adults (≥17 years old) hospitalized (between 2003 and 2012) at a tertiary referral center for acute mastoid infections or AOM not responding to outpatient medical treatment. RESULTS: Of the 160 patients in the study sample, 19% had an infection caused by S...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27893079/endoscopic-repair-of-tympanic-membrane-perforations-an-exercise-of-acrobatic-dexterity-or-the-sign-of-the-beginning-of-a-new-era-in-otology
#10
Manuela Fina
No abstract text is available yet for this article.
November 23, 2016: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27879419/tympanoplasty-outcomes-for-blast-induced-perforations-from-iraq-and-afghanistan-2007-2012
#11
Sungjin A Song, Shankar K Sridhara, Philip D Littlefield
OBJECTIVE: To describe characteristics of blast-induced tympanic membrane perforations that do not spontaneously heal, evaluate the outcomes of tympanoplasty techniques, and understand the factors associated with surgical success. SETTING: Two tertiary military health care institutions. STUDY DESIGN: Case series with chart review. SUBJECTS AND METHODS: This study reviewed the practice of 1 military neurotologist and included all tympanoplasties for combat blast-induced perforations from 2007 to 2012, which comprised a total of 55 patients...
November 22, 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/27879225/efficacy-of-posterior-canal-wall-reconstruction-using-autologous-auricular-cartilage-and-bone-p%C3%A3-t%C3%A3-in-chronic-otitis-media-with-cholesteatoma
#12
Min Kwan Baek, Sung Ho Choi, Dong Young Kim, Chang Hyun Cho, Yong Woo Kim, Kwang Ha Moon, Ju Hyoung Lee
OBJECTIVE: This study was designed to investigate the long-term results using the technique of canal wall up mastoidectomy and reconstruction of the posterior canal wall using bone pâté and auricular cartilage in the treatment of chronic otitis media with cholesteatoma. MATERIALS AND METHODS: A retrospective review was performed on 42 patients who underwent canal wall up mastoidectomy and posterior canal wall reconstruction at a single institution between November 2005 and November 2012...
November 23, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27879224/a-comparison-of-cartilage-palisades-and-temporal-fascia-in-type-1-tympanoplasty-for-bilateral-tympanic-membrane-perforations-in-children
#13
Taylan Gün, Osman Fatih Boztepe, Doğan Atan, Aykut İkincioğulları, Hüseyin Dere
OBJECTIVE: To compare the graft success rates and audiological outcomes of bilaterally performed type 1 tympanoplasty using cartilage palisades or temporal fascia in children. MATERIALS AND METHODS: We retrospectively analyzed the medical records of patients who underwent type 1 tympanoplasty at Medical Park Hospital between May 2007 and February 2013. 27 patients (54 ears) were enrolled in the study: 15 (30 ears) in the palisade cartilage group and 12 (24 ears) in the fascia group...
November 23, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27878362/a-3-d-analysis-of-the-protympanum-in-human-temporal-bones-with-chronic-ear-disease
#14
Henrique F Pauna, Rafael C Monsanto, Patricia Schachern, Michael M Paparella, Sebahattin Cureoglu
Eustachian tube dysfunction is believed to be an important factor to cholesteatoma development and recurrence of disease after surgical treatment. Although many studies have described prognostic factors, evaluation methods, or surgical techniques for Eustachian tube dysfunction, they relied on the soft tissues of its structure; little is known about its bony structure-the protympanum-which connects the Eustachian tube to the tympanic cavity, and can also be affected by several inflammatory conditions, both from the middle ear or from the nasopharynx...
November 22, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27868203/in-response-to-regeneration-of-traumatic-tympanic-membrane-perforation-using-egf-and-fgf-2
#15
Zhengcai-Lou, Zihan-Lou
No abstract text is available yet for this article.
November 21, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27863632/soft-wall-reconstruction-of-the-canal-wall-with-retrograde-bone-work-for-pediatric-cholesteatoma-long-term-results
#16
Miyako Hatano, Makoto Ito, Hisashi Sugimoto, Masao Noda, Hiroki Hasegawa, Tomokazu Yoshizaki
OBJECTIVE: To retrospectively evaluate the long-term results of surgery for retrograde bone work, using soft-wall reconstruction of the canal wall, for pediatric cholesteatoma. METHODS: We retrospectively evaluated a series of 25 consecutive ears of 24 patients who were ≤16 years of age. All children underwent cholesteatoma surgery between October 2002 and August 2008. The type of cholesteatoma, the length of follow-up, the incidence of residual and recurrent cholesteatoma, postoperative hearing results, and the form of the reconstructed external canal wall and tympanic membrane were assessed...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27861950/comparison-of-the-efficacy-of-endoscopic-tympanoplasty-and-microscopic-tympanoplasty-a-systematic-review-and-meta-analysis
#17
REVIEW
Chih-Chieh Tseng, Ming-Tang Lai, Chia-Che Wu, Sheng-Po Yuan, Yi-Fang Ding
OBJECTIVES: Microscopic tympanoplasty has been the standard surgery for repairing perforated tympanic membranes since the 1950s, but endoscopic tympanoplasty has been increasingly practiced since the late 1990s. In this study, we compared the efficacies of endoscopic and microscopic tympanoplasty. DATA SOURCES: PubMed, Embase, MEDLINE, and the Clinical Trial Register. REVIEW METHODS: We conducted a systematic review and meta-analysis following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis statement...
November 9, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27861251/fast-click-rate-electrocochleography-and-auditory-brainstem-response-in-normal-hearing-adults-using-continuous-loop-averaging-deconvolution
#18
Wafaa A Kaf, Kelly M Lewis, Erdem Yavuz, Samantha M Dixon, Mark Van Ess, Abdullah M Jamos, Rafael E Delgado
OBJECTIVES: Using the continuous loop averaging deconvolution (CLAD) technique for conventional electrocochleography (ECochG) and auditory brainstem response (ABR) recordings, the effects of testing at high stimulus rates may have the potential to diagnose disorders of the inner ear and auditory nerve. First, a body of normative data using the CLAD technique must be established. DESIGN: Extratympanic click ECochG and ABR to seven stimulus rates using CLAD were measured simultaneously from a tympanic membrane electrode and surface electrodes on the forehead and mastoid of 42 healthy individuals...
November 16, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27858893/tympanic-temperature-versus-temporal-temperature-in-patients-with-pyrexia-and-chills
#19
Wen-Chieh Yang, Huang-Tsung Kuo, Ching-Hsiao Lin, Kang-Hsi Wu, Yu-Jun Chang, Chun-Yu Chen, Han-Ping Wu
Accurate body temperature (BT) measurement is critical for immediate and correct estimation of core BT; measurement of changes in BT can provide physicians the initial information for selecting appropriate diagnostic approach and may prevent unnecessary diagnostic investigation. This study aimed to assess differences in tympanic and temporal temperatures among patients with fever in different conditions, especially in those with and without chills. This prospective study included patients from the emergency department between 2011 and 2012...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27855986/human-cochlear-hydrodynamics-a-high-resolution-%C3%AE-ct-based-finite-element-study
#20
Annalisa De Paolis, Hirobumi Watanabe, Jeremy T Nelson, Marom Bikson, Mark Packer, Luis Cardoso
Measurements of perilymph hydrodynamics in the human cochlea are scarce, being mostly limited to the fluid pressure at the basal or apical turn of the scalae vestibuli and tympani. Indeed, measurements of fluid pressure or volumetric flow rate have only been reported in animal models. In this study we imaged the human ear at 6.7 and 3-µm resolution using µCT scanning to produce highly accurate 3D models of the entire ear and particularly the cochlea scalae. We used a contrast agent to better distinguish soft from hard tissues, including the auditory canal, tympanic membrane, malleus, incus, stapes, ligaments, oval and round window, scalae vestibule and tympani...
November 10, 2016: Journal of Biomechanics
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