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https://www.readbyqxmd.com/read/28498487/the-malleus-to-oval-window-revision-stapedotomy-efficacy-and-longitudinal-study-outcome
#1
Peter A Benedict, Ling Zhou, Robert Peng, Darius Kohan
OBJECTIVE: To determine the longitudinal effectiveness of the malleus to oval window stapedotomy technique among patients undergoing revision surgery when the incus is unavailable. STUDY DESIGN: Retrospective, case series. METHODS: Charts of 15 patients who underwent 17 malleus attachment stapedotomies performed by a single surgeon from 2000 to 2015 were reviewed. Surgery was ambulatory, transcanal, with laser technique, and under local anesthesia...
May 12, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28476655/comparison-between-clinical-and-audiological-results-of-tympanoplasty-with-modified-sandwich-technique-and-underlay-technique
#2
Sanjana Vijay Nemade, Kiran Jaywant Shinde, Chetana Shivadas Naik, Haris Qadri
INTRODUCTION: Surgical repair of the tympanic membrane, termed a type one tympanoplasty is a tried and tested treatment modality. Overlay or underlay technique of tympanoplasty is common. Sandwich tympanoplasty is the combined overlay and underlay grafting of tympanic membrane. OBJECTIVE: To describe and evaluate the modified sandwich graft (mediolateral graft) tympanoplasty using temporalis fascia and areolar fascia. To compare the clinical and audiological outcome of modified sandwich tympanoplasty with underlay tympanoplasty...
April 21, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28463590/systematic-review-of-ossicular-chain-anatomy-strategic-planning-for-development-of-novel-middle-ear-prostheses
#3
Brandon Kamrava, Pamela C Roehm
Objective To systematically review the anatomy of the ossicular chain. Data Sources Google Scholar, PubMed, and otologic textbooks. Review Methods A systematic literature search was performed on January 26, 2015. Search terms used to discover articles consisted of combinations of 2 keywords. One keyword from both groups was used: [ ossicular, ossicle, malleus, incus, stapes] and [ morphology, morphometric, anatomy, variation, physiology], yielding more than 50,000 hits. Articles were then screened by title and abstract if they did not contain information relevant to human ossicular chain anatomy...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28459103/meckel-s-cartilage-breakdown-offers-clues-to-mammalian-middle-ear-evolution
#4
Neal Anthwal, Daniel J Urban, Zhe Xi Luo, Karen E Sears, Abigail S Tucker
A key transformation in mammalian ear evolution was incorporation of the primary jaw joint of premammalian synapsids into the definitive mammalian middle ear of living mammals. This evolutionary transition occurred in two-steps, starting with a partial or "transitional" mammalian middle ear in which the ectotympanic and malleus were still connected to the mandible by an ossified Meckel's Cartilage (MC), as observed in many Mesozoic mammals. This was followed by MC breakdown, freeing the ectotympanic and the malleus from the mandible and creating the definitive mammalian middle ear...
March 6, 2017: Nat Ecol Evol
https://www.readbyqxmd.com/read/28441229/preliminary-model-for-the-design-of-a-custom-middle-ear-prosthesis
#5
Brandon Kamrava, Jonathan A Gerstenhaber, Mamta Amin, Yah-El Har-El, Pamela C Roehm
HYPOTHESIS: Custom prostheses could be used to recreate the ossicular chain and improve hearing. BACKGROUND: Ossicular discontinuity or fixation occurs in 55% of cases of conductive hearing loss, with most cases involving the incus. Reconstruction has been achieved by a variety of methods; however, there has been little improvement in hearing outcomes in decades. METHODS: Precise measurements of anatomic dimensions, weight, and center of gravity were taken from 19 cadaveric incudes...
April 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28274902/revision-stapedectomy-with-necrosis-of-the-long-process-of-the-incus-does-the-degree-of-necrosis-matter-a-retrospective-clinical-study
#6
Mohamed Ghonim, Yousef Shabana, Bassem Ashraf, Mohamed Salem
OBJECTIVE: To discuss the different modalities for managing necrosis of the long process of the incus in revision stapedectomy on the basis of the degree of necrosis and compare the results with those reported in the literature. MATERIALS AND METHODS: Thirty-six patients underwent revision stapedectomy with the necrosis of the long process of the incus from 2009 to 2016. The patients were divided into three groups on the basis of the degree of necrosis. For group A (minimal necrosis), augmentation technique with bone cement was performed...
March 9, 2017: Journal of International Advanced Otology
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
#7
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
#8
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/28239575/observations-on-tympanic-membrane-perforations-safe-type-and-hearing-loss
#9
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
https://www.readbyqxmd.com/read/28192384/lucae-s-springy-pressure-probe-to-mobilize-the-ossicular-chain-rise-and-fall-of-an-ingenious-instrument
#10
Rinze Anthony Tange, Albert Mudry
OBJECTIVES/HYPOTHESES: In 1884, Johann Constantin August Lucae (1835-1911), a German otologist from Berlin, introduced a new "method to mechanically treat chronic troubles of the mobility of the hearing organ transmission apparatus." It consisted in the use of a springy pressure probe to directly mobilize the handle of the malleus. The aim of this study is to trace the invention, clinical use, technological modifications, and ultimate extinction of this instrument. METHOD: Review of Lucae's publications, comments by his colleagues, and trade catalogues published between 1880 and 1940...
March 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28117786/dissection-of-the-auditory-bulla-in-postnatal-mice-isolation-of-the-middle-ear-bones-and-histological-analysis
#11
Ayako Sakamoto, Yukiko Kuroda, Sho Kanzaki, Koichi Matsuo
In most mammals, auditory ossicles in the middle ear, including the malleus, incus and stapes, are the smallest bones. In mice, a bony structure called the auditory bulla houses the ossicles, whereas the auditory capsule encloses the inner ear, namely the cochlea and semicircular canals. Murine ossicles are essential for hearing and thus of great interest to researchers in the field of otolaryngology, but their metabolism, development, and evolution are highly relevant to other fields. Altered bone metabolism can affect hearing function in adult mice, and various gene-deficient mice show changes in morphogenesis of auditory ossicles in utero...
January 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28109505/results-of-vsb-implantation-at-the-short-process-of-the-incus-in-children-with-ear-atresia
#12
Charlotte Célérier, Briac Thierry, Cyrille Coudert, Marion Blanchard, Natalie Loundon, Erea Noel Garabédian, Françoise Denoyelle
OBJECTIVE(S): To describe a new and more simple surgical procedure for implanting the Vibrant Soundbridge (VSB) on the short process of the incus in children with ear atresia and atretic plate and present the audiometric results. METHODS: Since 2014, pre- and post-operative audiometric tests with tonal and vocal audiometryat the maximal follow up, respectively 33, 22 and 12 months were performed after VSB implantation at the ENT department, Necker Enfants Malades Hospital, Paris, France...
February 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27959908/ectopic-mineralization-and-conductive-hearing-loss-in-enpp1asj-mutant-mice-a-new-model-for-otitis-media-and-tympanosclerosis
#13
Cong Tian, Belinda S Harris, Kenneth R Johnson
Otitis media (OM), inflammation of the middle ear, is a common cause of hearing loss in children and in patients with many different syndromic diseases. Studies of the human population and mouse models have revealed that OM is a multifactorial disease with many environmental and genetic contributing factors. Here, we report on otitis media-related hearing loss in asj (ages with stiffened joints) mutant mice, which bear a point mutation in the Enpp1 gene. Auditory-evoked brainstem response (ABR) measurements revealed that around 90% of the mutant mice (Enpp1asj/asj) tested had moderate to severe hearing impairment in at least one ear...
2016: PloS One
https://www.readbyqxmd.com/read/27926945/ear-structures-of-the-naked-mole-rat-heterocephalus-glaber-and-its-relatives-rodentia-bathyergidae
#14
Matthew J Mason, Hannah L Cornwall, Ewan St J Smith
Although increasingly popular as a laboratory species, very little is known about the peripheral auditory system of the naked mole-rat, Heterocephalus glaber. In this study, middle and inner ears of naked mole-rats of a range of ages were examined using micro-computed tomography and dissection. The ears of five other bathyergid species (Bathyergus suillus, Cryptomys hottentotus, Fukomys micklemi, Georychus capensis and Heliophobius argenteocinereus) were examined for comparative purposes. The middle ears of bathyergids show features commonly found in other members of the Ctenohystrica rodent clade, including a fused malleus and incus, a synovial stapedio-vestibular articulation and the loss of the stapedius muscle...
2016: PloS One
https://www.readbyqxmd.com/read/27915026/effects-of-model-definitions-and-parameter-values-in-finite-element-modeling-of-human-middle-ear-mechanics
#15
Daniel De Greef, Felipe Pires, Joris J J Dirckx
BACKGROUND: Despite continuing advances in finite element software, the realistic simulation of middle ear response under acoustic stimulation continues to be challenging. One reason for this is the wide range of possible choices that can be made during the definition of a model. Therefore, an explorative study of the relative influences of some of these choices is potentially very helpful. METHOD: Three finite element models of the human middle ear were constructed, based on high-resolution micro-computed tomography scans from three different human temporal bones...
December 1, 2016: Hearing Research
https://www.readbyqxmd.com/read/27855986/human-cochlear-hydrodynamics-a-high-resolution-%C3%AE-ct-based-finite-element-study
#16
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...
January 4, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/27837423/the-effects-of-surgery-type-and-different-ossiculoplasty-materials-on-the-hearing-results-in-cholesteatoma-surgery
#17
Sultan Şevik Eliçora, Duygu Erdem, Aykut Erdem Dinç, Murat Damar, Sultan Bişkin
To investigate the effects of surgery type [intact canal wall (ICW) or canal wall down (CWD) mastoidectomy] and different ossiculoplasty materials on hearing outcome in single-staged cholesteatoma surgery. A retrospective case-control study. A total of 116 cases (97 adults, 29 children) underwent surgery, including ossiculoplasty, between 2012 and 2015 for cholesteatoma. Patients who had undergone surgery for the first time, and whose grafts were successful, were included in the study. Patients with adhesive otitis media, unsuccessful grafts, revision and recurrent cases, radical mastoidectomy, and craniofacial anomalies were excluded...
February 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27833873/pre-operative-indicators-of-ossicular-necrosis-in-tubotympanic-csom
#18
Celina Lovely Jayakumar, Leeberk R Inbaraj, George J O Pinto
Ossicular necrosis and erosion is commonly seen in CSOM with cholesteatoma but can also occur in tubotympanic CSOM. This usually comes as a surprise during surgery. Preoperative knowledge of ossicular necrosis helps the surgeon to be better prepared for the surgery and ossicular construction if required. Hence, this study is intended to identify the pre-operative indicators of ossicular necrosis. This cross sectional study was conducted in Father Muller Medical College in Mangalore. Sixty nine consecutive patients with tubotympanic CSOM underwent a detailed clinical examination with pure tone audiometry and subsequently tympanoplasty with or without cortical mastoidectomy...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/27755357/cochleariform-process-abutment-on-tbct-in-early-congenital-cholesteatoma
#19
Chang Ho Lee, So Young Kim, Hyoung-Mi Kim, Young Ju Kim, Ji Yoon Kim, Mi Kyung Kim
OBJECTIVES: To study the influence of the cochleariform process abutment (CPA) of early congenital cholesteatomas (CC) (ECCs) on surgical outcomes. STUDY DESIGN: Retrospective case review. SETTING: University hospital otology referral clinic. PATIENTS: Two hundred consecutive pediatric ECC patients. INTERVENTIONS: The patients were classified into three groups based on the temporal bone computed tomography (TBCT) findings of ECC: A) the absence of CPA, B) the presence of CPA, and C) the presence of CPA and extension posterior to the malleus handle...
January 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/27749749/a-new-intraoperative-real-time-monitoring-system-for-reconstructive-middle-ear-surgery-an-experimental-and-clinical-feasibility-study
#20
Thomas Zahnert, Marie-Luise Metasch, Hannes Seidler, Matthias Bornitz, Nicoloz Lasurashvili, Marcus Neudert
HYPOTHESIS: Electromagnetical excitation of ossicular vibration is suitable for middle ear transmission measurements in the experimental and clinical setting. Thereby, it can be used as a real-time monitoring system for quality control in ossiculoplasty. BACKGROUND: Positioning and coupling of middle ear prosthesis are a precondition for good postoperative hearing results, but at the same time completely dependent upon the surgeon's subjective judgment during surgery...
December 2016: Otology & Neurotology
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