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tympanic bone

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https://www.readbyqxmd.com/read/28203388/on-the-development-of-the-chondrocranium-and-the-histological-anatomy-of-the-head-in-perinatal-stages-of-marsupial-mammals
#1
REVIEW
Marcelo R Sánchez-Villagra, Analía M Forasiepi
An overview of the literature on the chondrocranium of marsupial mammals reveals a relative conservatism in shape and structures. We document the histological cranial anatomy of individuals representing Monodelphis domestica, Dromiciops gliroides, Perameles sp. and Macropus eugenii. The marsupial chondrocranium is generally characterized by the great breadth of the lamina basalis, absence of pila metoptica and large otic capsules. Its most anterior portion (cupula nasi anterior) is robust, and anterior to it there are well-developed tactile sensory structures, functionally important in the neonate...
2017: Zoological Letters
https://www.readbyqxmd.com/read/28194509/fetal-facial-nerve-course-in-the-ear-region-revisited
#2
Zhe Wu Jin, Kwang Ho Cho, Hiroshi Abe, Yukio Katori, Gen Murakami, Jose Francisco Rodríguez-Vázquez
PURPOSE: The aim of this study was to re-examine the structures that determine course of the facial nerve (FN) in the fetal ear region. MATERIALS AND METHODS: We used sagittal or horizontal sections of 28 human fetuses at 7-8, 12-16, and 25-37 weeks. RESULTS: The FN and the chorda tympani nerve ran almost parallel until 7 weeks. The greater petrosal nerve (GPN) ran vertical to the distal FN course due to the trigeminal nerve ganglion being medial to the geniculate ganglion at 7 weeks...
February 14, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28180050/utility-of-an-ultrasonic-aspirator-in-transcanal-endoscopic-resection-of-temporal-bone-paraganglioma
#3
Brendan P O'Connell, Jacob B Hunter, Matthew L Carlson, Brandon Isaacson, Alejandro Rivas, George B Wanna
The objective of this study was to evaluate the role of removing middle ear paragangliomas using an ultrasonic aspirator (UA) through a transcanal, exclusively endoscopic approach. Three consecutive patients undergoing transcanal endoscopic resection of middle ear paragangliomas using an UA were retrospectively studied. The primary outcome measure was achieving gross total tumor resection. Secondary outcomes included postoperative hearing and early convalescence. Two glomus tympanicum tumors and one small glomus jugulare were included, and complete tumor resection was achieved endoscopically in all cases...
February 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28122100/acute-bacterial-meningitis-caused-by-acute-otitis-media-in-adults-a-series-of-12-patients
#4
Daniel M Kaplan, Ofer Gluck, Mordechai Kraus, Youval Slovik, Hindy Juwad
We conducted a retrospective chart review to characterize the outcomes of 12 patients-9 men and 3 women, aged 21 to 79 years (mean: 49)-who had been treated at our tertiary care center for acute bacterial meningitis caused by acute otitis media (ABMAO). Fever was the most common presenting sign/symptom, observed in 8 patients, followed by otalgia, neck stiffness, headache, and confusion. An opaque and bulging tympanic membrane was observed in 8 patients. Cultures were positive for Streptococcus pneumoniae in the cerebrospinal fluid, ear, and blood in 7, 5, and 3 patients, respectively...
January 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28119094/regenerative-treatment-for-tympanic-membrane-perforation-using-gelatin-sponge-with-basic-fibroblast-growth-factor
#5
Kaoru Omae, Shin-Ichi Kanemaru, Eiji Nakatani, Hideaki Kaneda, Tsutomu Nishimura, Risa Tona, Yasushi Naito, Atsuhiko Kawamoto, Masanori Fukushima
OBJECTIVE: The objective of this study was to evaluate safety and efficacy of regenerative treatment using gelatin sponge with basic fibroblast growth factor (bFGF) in patients with tympanic membrane perforation (TMP). METHODS: The current study was a prospective, multicenter, open-label, single-arm, and exploratory clinical trial to evaluate the safety and efficacy of the TM regeneration procedure (TMRP). Myringotomy was used to mechanically disrupt the edge of the TMP, and a gelatin sponge immersed in bFGF was then placed over the perforation...
January 21, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28119093/comparison-of-endoscopic-transcanal-myringoplasty-and-endoscopic-type-i-tympanoplasty-in-repairing-medium-sized-tympanic-perforations
#6
Chih-Chieh Tseng, Ming-Tang Lai, Chia-Che Wu, Sheng-Po Yuan, Yi-Fang Ding
OBJECTIVE: The tympanomeatal flap elevation technique has been used in tympanoplasty for decades; however, this procedure has disadvantages. In recent years, endoscopic transcanal myringoplasty (ETM) has been increasingly practiced and has yielded positive results.This study compares the efficacy of ETM and endoscopic type I tympanoplasty (ETT) in repairing medium-sized perforations of the tympanic membrane. METHODS: This retrospective medical record review included patients undergoing surgery for medium-sized perforations of the tympanic membrane from January 1, 2013 to August 1, 2015...
January 21, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28106625/long-term-hearing-results-after-ossiculoplasty
#7
Matthew D Cox, Aaron Trinidade, James Shep Russell, John L Dornhoffer
OBJECTIVES: To determine if the OOPS index is predictive of long-term hearing results after ossiculoplasty. STUDY DESIGN: Case series with retrospective chart review. SETTING: Tertiary care otology practice. PATIENTS: Adult and pediatric patients (3-88 years of age). INTERVENTIONS: Ossiculoplasty with cartilage tympanoplasty, with or without mastoidectomy. OUTCOME MEASURES: Primary outcome measures included short-term hearing results (pure-tone average air-bone gap [PTA-ABG] measured between 60 days and 1 year after surgery), long-term hearing results (PTA-ABG measured ≥5 years after surgery), and the rate of successful ABG closure to ≤20 dB...
January 18, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28057352/sigmoid-sinus-cortical-plate-dehiscence-induces-pulsatile-tinnitus-through-amplifying-sigmoid-sinus-venous-sound
#8
Shan Tian, Lizhen Wang, Jiemeng Yang, Rui Mao, Zhaohui Liu, Yubo Fan
Sigmoid sinus cortical plate dehiscence (SSCPD) is common in pulsatile tinnitus (PT) patients, and is treated through SSCPD resurfacing surgery in clinic, but the bio-mechanism is not clear as so far. This study aimed to clarify the bio-mechanism of PT sensation induced by SSCPD, and quantify the relationship of cortical plate (CP) thickness and PT sensation intensity. It was hypothesized that SSCPD would induce PT through significantly amplifying sigmoid sinus (SS) venous sound in this study. Finite element (FE) analysis based on radiology data of typical patient was used to verify this hypothesis, and was validated with clinical reports...
February 8, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28057076/audiometric-findings-with-voluntary-tensor-tympani-contraction
#9
Brandon Wickens, Duncan Floyd, Manohar Bance
BACKGROUND: Tensor tympani contraction may have a "signature" audiogram. This study demonstrates audiometric findings during voluntary tensor tympani contraction. METHODS: Five volunteers possessing the ability to voluntarily contract their tensor tympani muscles were identified and enrolled. Tensor tympani contraction was confirmed with characteristic tympanometry findings. Study subjects underwent conventional audiometry. Air conduction and bone conduction threshold testing was performed with and without voluntary tensor tympani contraction...
January 5, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28031155/an-implantable-hearing-system-as-rehabilitation-for-hearing-loss-due-to-bilateral-aural-atresia-surgical-technique-and-audiological-results
#10
Rubens de Brito, Luzia Maria Pozzobom Ventura, José Carlos Jorge, Eduardo Boaventura Oliveira, Luiz Fernando Manzoni Lourencone
OBJECTIVE: To demonstrate the surgical technique and audiological results of a middle ear implant for restoring hearing in patients with bilateral aural atresia and microtia with conductive or mixed hearing loss. MATERIALS AND METHODS: In this prospective study, 12 subjects aged 12 years and older presenting with hearing loss and bilateral congenital aural atresia underwent surgical insertion of a middle ear implant. The patients underwent tympanomastoidectomy with a wide opening of the attic and preservation of the roof of the atresic tympanic bone to expose the middle ear and position the floating mass transducer of the implant...
December 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28011121/temporal-bone-paragangliomas-15-years-experience
#11
Mehmet Düzlü, Hakan Tutar, Recep Karamert, Furkan Karaloğlu, Muammer Melih Şahin, Mehmet Göcek, Mehmet Birol Uğur, Nebil Göksu
INTRODUCTION: Temporal bone paragangliomas (TBPs) are benign tumors arising from neural crest cells located along the jugular bulbus and the tympanic plexus. In general surgical excision, radiotherapy and wait-and-scan protocols are the main management modalities for TBPs. OBJECTIVE: In this paper we aim to present our clinical experience with TBPs and to review literature data. METHODS: The patients who were operated for tympanomastoid paraganglioma (TMP) or tympanojugular paraganglioma (TJP) in our clinic in the last 15 years were enrolled in the study...
December 8, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28005182/aminoglycoside-increases-permeability-of-osseous-spiral-laminae-of-cochlea-by-interrupting-mmp-2-and-mmp-9-balance
#12
Dengke Li, Jianhe Sun, Lidong Zhao, Weiwei Guo, Wei Sun, Shiming Yang
The spiral ganglion neurons (SGNs) located in the Rosenthal's canal of cochlea are essential target for cochlear implant. Previous studies found that the canaliculi perforantes, small pores on the surface of the osseous spiral lamina (OSL) of the scala tympanic (ST) of cochlea, may provide communication between the cochlear perilymph and SGNs. In this study, we found that chronic treatment of aminoglycosides antibiotics, which is well known to cause sensory cell damage in the cochlea, induced significant damage of bone lining cells on the OSLs and increased the permeability of the Rosenthal's canal...
December 22, 2016: Neurotoxicity Research
https://www.readbyqxmd.com/read/28003898/clinical-significance-of-an-unusual-variation-anomalous-additional-belly-of-the-sternothyroid-muscle
#13
M Senthil Murugan, R Sudha, Rajesh Bhargavan
The infrahyoid muscles are involved in vocalisation and swallowing; among these, the sternothyroid muscle is derived from the common primitive sheet. The improper differentiation of this muscle may therefore result in morphological variations. We report an unusual variation found during the dissection of a 65-year-old male cadaver at the Sri Manakula Vinayagar Medical College, Madagadipet, Pondicherry, India, in 2015. An anomalous belly of the right sternothyroid muscle was observed between the internal jugular (IJ) vein and the internal carotid artery with an additional insertion into the tympanic plate and petrous part of the temporal bone and the presence of a levator glandulae thyroideae muscle...
November 2016: Sultan Qaboos University Medical Journal
https://www.readbyqxmd.com/read/27995828/single-dose-intratympanic-mesna-application-inhibits-propylene-glycol-induced-cholesteatoma-formation
#14
O Ismi, Y Y Karabulut, K K Bal, Y Vayisoglu, M Unal
OBJECTIVE: Mesna (i.e. sodium 2-mercaptoethanesulfonate; C2H5NaO3S2) has been used in otological surgery such as cholesteatoma dissection and tympanic membrane lateralisation in atelectatic ears. However, this study aimed to investigate its effect on cholesteatoma formation. METHODS: A total of 20 Wistar rats were divided into two groups of 10 animals. The right and left ears of control animals were treated with saline (saline control group; n = 10 ears) and propylene glycol plus saline (propylene glycol control group; n = 10 ears), respectively...
December 20, 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/27994124/major-evolutionary-transitions-and-innovations-the-tympanic-middle-ear
#15
REVIEW
Abigail S Tucker
One of the most amazing transitions and innovations during the evolution of mammals was the formation of a novel jaw joint and the incorporation of the original jaw joint into the middle ear to create the unique mammalian three bone/ossicle ear. In this review, we look at the key steps that led to this change and other unusual features of the middle ear and how developmental biology has been providing an understanding of the mechanisms involved. This starts with an overview of the tympanic (air-filled) middle ear, and how the ear drum (tympanic membrane) and the cavity itself form during development in amniotes...
February 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27955869/outcomes-of-type-i-tympanoplasty-using-a-cartilage-shield-graft-in-patients-with-poor-prognostic-factors
#16
Kyung Wook Heo
OBJECTIVE: Although fascia is widely used as the grafting material in tympanoplasty (TP), unsatisfactory outcomes can result in patients with poor prognostic factors. Recently, cartilage has emerged as a graft material in TP. This study examined the operative outcomes of type I TP using a cartilage shield graft (CSG) in patients with poor prognostic factors. METHODS: This study reviewed the medical records of patients who underwent type I TP using CSG performed by the same surgeon, with over 24 months of follow-up...
December 7, 2016: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/27942599/fibrinogen-based-collagen-fleece-graft-myringoplasty-for-traumatic-tympanic-membrane-perforation
#17
Seung Hyo Choi, Hyoung Yong Song, Chan Il Song
BACKGROUND AND OBJECTIVES: The aim of this study was to investigate how fibrinogen-based collagen fleece (Tachocomb®) graft myringoplasty (FCGM), performed under microscopic guidance, improves both hearing and tympanic membrane tissue repair in patients with traumatic tympanic membrane perforation (TMP). SUBJECTS AND METHODS: Between August 2009 and March 2015, a total of 52 patients with traumatic TMP visited the department of otorhinolaryngology at a secondary medical center...
December 2016: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/27924172/hyaluronic-acid-fat-graft-myringoplasty-versus-autologous-platelet-rich-plasma
#18
Salman F Alhabib, Issam Saliba
BACKGROUND: Hyaluronic acid fat graft myringoplasty (HAFGM) is an office-based technique for tympanic membrane perforation (TMP) treatment. It is simple, inexpensive, and performed under local anesthesia at the outpatient office department. We aimed to compare HAFGM technique to a recently described topical use of autologous platelet rich plasma myringoplasty (PRPM) in the repair of TMP. We also aimed to assess the hearing level improvement postoperatively. METHODS: We conducted a prospective study in an adult tertiary care center between January 2015 and January 2016...
January 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/27917790/retrospective-air-bone-gap-evaluation-of-patients-with-tympanic-membrane-central-perforation
#19
Levent Küçükkavruk, Esra Temügan, Mesut Kaya, Selim Unsal, Nebi Mustafa Gumus, Mustafa Yüksel, Mehmet Gündüz
PURPOSE: The purpose of this study was to evaluate hearing recovery and air-bone gap (ABG) before and after tympanoplasty surgery in patients with tympanic membrane central perforation. METHODS: Histories and audiological assessments of 160 cases (total of 26 ears from 22 patients; 11 men and 11 women) from patients who had undergone tympanoplasty surgery and hearing reconstruction due to tympanic membrane central perforation were evaluated. Pre-postoperative audiograms and the pure tone, air-bone hearing thresholds and ABG gains were evaluated...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
https://www.readbyqxmd.com/read/27916013/effectiveness-of-transperforation-myringoplasty-in-bilateral-chronic-otitis-media-patients-undergoing-contralateral-tympanoplasty
#20
A T Ihsan, K Ranjana
OBJECTIVES: Bilateral tympanic membrane perforation closure is usually performed by otosurgeons in two sittings. However, in this study, transperforation myringoplasty was performed alongside contralateral tympanoplasty in a single sitting. The effectiveness of transperforation myringoplasty procedure and the benefits of single sitting bilateral surgery were evaluated. METHODS: A prospective study of 50 selected patients with mucosal-type bilateral chronic otitis media was conducted...
January 2017: Journal of Laryngology and Otology
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