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Stapes footplate

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https://www.readbyqxmd.com/read/29570801/predictive-factors-in-995-stapes-surgeries-for-primary-otosclerosis
#1
Mohammad T Khorsandi A, Mir M Jalali, Vahideh Shoshi D
OBJECTIVES/HYPOTHESIS: This study sought to identify the predictors of outcome in patients with otosclerosis undergoing primary stapes surgery. STUDY DESIGN: Retrospective analysis of medical records. METHODS: A total of 995 patients with otosclerosis who underwent primary stapes surgery by a single surgeon between January 2006 and December 2016 were included. Logistic regression analysis was performed to examine factors affecting postoperative hearing thresholds at individual frequencies...
March 23, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29533330/picosecond-infrared-laser-pirl-application-in-stapes-surgery-first-experience-in-human-temporal-bones
#2
Hannes Petersen, Alexandra Gliese, Yannick Stober, Stephanie Maier, Nils-Owe Hansen, Sebastian Kruber, Dennis Eggert, Miklós Tóth, Tobias Gosau, Hartmut Schlüter, Klaus Püschel, Udo Schumacher, Robert John Dwayne Miller, Adrian Münscher, Carsten Dalchow
OBJECTIVE: Using a contact-free laser technique for stapedotomy reduces the risk of mechanical damage of the stapes footplate. However, the risk of inner ear dysfunction due to thermal, acoustic, or direct damage has still not been solved. The objective of this study was to describe the first experiences in footplate perforation in cadaver tissue performed by the novel Picosecond-Infrared-Laser (PIRL), allowing a tissue preserving ablation. PATIENTS AND INTERVENTION: Three human cadaver stapes were perforated using a fiber-coupled PIRL...
April 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29525379/average-middle-ear-frequency-response-curves-with-preservation-of-curve-morphology-characteristics
#3
Kilian Gladiné, Joris J J Dirckx
For the validation of modelling results or the comparison of middle ear interventions, such as prostheses placement, average responses of middle ear vibrations are needed. One such response is the amplitude and phase of the vibration of the stapes footplate as a function of frequency. Average responses and their standard deviation are commonly obtained by calculating the mean of a number of measured responses at each frequency. A typical middle ear magnitude response curve shows a number of distinct peaks, and the location of these peaks varies between ears...
June 2018: Hearing Research
https://www.readbyqxmd.com/read/29516059/audiological-results-of-endoscopic-surgical-repair-of-the-long-process-of-incus
#4
Badi Aldosari, Jean-Marc Thomassin
Objective: The purpose of this study is to evaluate our experience with endoscopic repair of ossicular discontinuity at the incudostapedial joint, with or without an intact stapes suprastructure, and present our hearing results. We classify results based on the causative pathology, the type of ossiculoplasty, and type of lesion. We demonstrate the ability to endoscopically place a total ossicular replacement prosthesis (TORP), measuring 4.25 mm, between the stapes footplate and the incus remnant to reestablish ossicular continuity...
September 2017: World Journal of Otorhinolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29502725/the-stapes-prosthesis-past-present-and-future
#5
REVIEW
Alexander Sevy, Moises Arriaga
Since the original carved Teflon stapes over vein graft, stapedectomy prostheses have undergone evolution. Prostheses shapes, materials, and surgical techniques for placement have reflected advances in biomaterials and surgical tools. The variability in prostheses has reflected alternative techniques of stapedectomy and stapedotomy and differing strategies for attachment to the incus. Although many iterations of stapes prostheses have been proposed, excellent results can be achieved with various prostheses designed to rest on tissue grafts in stapedectomy techniques or pass through the footplate in stapedotomy techniques when used by surgeons experienced with technique details specific to the selected prosthesis...
April 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29499347/is-oval-window-transport-a-royal-gate-for-nanoparticle-delivery-to-vestibule-in-the-inner-ear
#6
Shan Ding, Shibao Xie, Weiquan Chen, Lu Wen, Junyi Wang, Fan Yang, Gang Chen
Drug delivery to the inner ear by nanomedicine strategies has emerged as an effective therapeutic approach for the management of inner ear diseases including hearing and balance disorders. It is well accepted that substance enters the perilymph from the middle ear through the round window membrane (RWM), but the passage through the oval window (OW) has long been neglected. Up to now, researchers still know little about the pathway via which nanoparticles (NPs) enter the inner ear or how they reach the inner ear following local applications...
February 28, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29467266/oldest-known-multituberculate-stapes-suggests-an-asymmetric-bicrural-pattern-as-ancestral-for-multituberculata
#7
Julia A Schultz, Irina Ruf, Thomas Martin
Middle ear ossicles (malleus, incus, stapes) are known for few multituberculate taxa, and three different stapedial morphotypes have been suggested: (i) slender, columelliform and microperforate, (ii) robust and rod-like, and (iii) bicrural. Reinvestigation of Upper Jurassic (Kimmeridgian) mammalian petrosals from the Guimarota coal mine in central Portugal (Western Europe) revealed an asymmetric bicrural stapes (ABS) in the paulchoffatiid Pseudobolodon oreas The middle ear ossicles displaced inside the osseous vestibule were detected by a µCT analysis...
February 28, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29428320/minimally-traumatic-stapes-surgery-for-otosclerosis-risk-reduction-of-post-operative-vertigo
#8
An-Suey Shiao, Chin-Lung Kuo, Mao-Che Wang, Chia-Huei Chu
BACKGROUND: The author (Dr. Shiao) modified traditional stapes surgery (TSS) specifically for patients with otosclerosis. The proposed technique, referred to as minimally traumatic stapes surgery (MTSS), reduces the risk of subjective discomfort (i.e. vertigo and tinnitus) following surgery. This paper compares the effectiveness of MTSS with that of TSS. METHODS: The medical records of patients with otosclerosis after stapes surgery (TSS or MTSS) were analyzed. Outcome variables included post-operative vertigo, tinnitus, and hearing success...
February 7, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29397114/special-anatomic-considerations-in-otosclerosis-surgery
#9
REVIEW
Helge Rask-Andersen, Nadine Schart-Morén, Karin Strömbäck, Fred Linthicum, Hao Li
The anatomy of the vestibular organs together with considerations of the middle and inner ear anatomy relevant to stapes surgery is discussed. An archival collection of macerated and freshly frozen human temporal bones underwent micro-computed tomography (CT) with subsequent volume-rendering. Three-dimensional (3D) reconstructions and the topographic anatomy of the oval window were considered. Micro-CT and 3D rendering revealed the relationship between the otolith organs and the oval window. Anatomic variations were extensive and included the distance between the footplate and the reconstructed macula margins...
April 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29397113/prevention-and-management-of-complications-in-otosclerosis-surgery
#10
REVIEW
Patrick J Antonelli
Surgical management of otosclerosis is a relatively safe and effective procedure, with a high rate of hearing improvement and a low rate of undesirable outcomes and complications. Many of these potential complications are common to any middle ear surgery, but many are unique to surgery involving the stapes footplate. Preventing complications with stapes surgery and minimizing their impact may be achieved by preparation as well as surgical experience.
April 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29395112/endoscopic-stapes-surgery
#11
REVIEW
Brandon Isaacson, Jacob B Hunter, Alejandro Rivas
The management of stapes fixation using transcanal endoscopic ear surgery is a viable alternative approach. The advantages of transcanal endoscopic ear surgery are improved visualization and illumination of the stapes and oval window regardless of the size and geometry of the external auditory canal. Footplate work and prosthesis placement pose significant but surmountable challenges using transcanal endoscopic ear surgery secondary to the lack of depth perception. Several recent studies demonstrate the efficacy and safety of transcanal endoscopic ear surgery...
April 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29359706/refining-non-invasive-techniques-to-measure-intracranial-pressure-comparing-evoked-and-spontaneous-tympanic-membrane-displacements
#12
Laurie C Finch, Robert J Marchbanks, Diederik Bulters, Anthony A Birch
OBJECTIVE: Tympanic membrane displacements (TMDs) are used to non-invasively gauge inner-ear fluid pressure. Inner-ear fluid pressure equalizes with intracranial pressure (ICP) via the cochlear aqueduct and therefore TMDs can indirectly evaluate ICP. We studied the relationship between two TMD modalities, evoked and spontaneous. Evoked TMD is a reflex response to an auditory stimulus and the established stapes-footplate mechanism explains how evoked TMDs change with ICP. Spontaneous TMD refers to a pulsatile TMD waveform expressed in the form of pulse amplitudes (TMD-PAs), the origins of which are poorly understood...
February 28, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29298506/a-new-reversal-steps-stapedotomy
#13
Giuseppe Malafronte
OBJECTIVE: To evaluate whether removal of the stapes head and not the entire stapes superstructure prevents footplate complications. STUDY DESIGN: Prospective study. PATIENTS: One hundred and forty-five patients with otosclerosis were included. Patients were divided into 2 groups as follows: Individuals in group 1 (n = 75) underwent removal of the entire stapes superstructure; individuals in group 2 (n = 70) underwent removal of the stapes head only...
March 2018: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29214174/feasibility-of-round-window-stimulation-by-a-novel-electromagnetic-microactuator
#14
Wouter Johannes van Drunen, Mathias Mueller, Anatoly Glukhovskoy, Rolf Salcher, Marc Christopher Wurz, Thomas Lenarz, Hannes Maier
Introduction: Most implantable hearing aids currently available were developed to compensate the sensorineural hearing loss by driving middle ear structures (e.g., the ossicles). These devices are successfully used in round window (RW) stimulation clinically, although this was initially not the intended use. Here, a novel microactuator, specifically designed for RW stimulation, was tested in human temporal bones to determine actuator performance and applicability. Methods: Stapes footplate response to RW stimulation was determined experimentally in human temporal bones and the obtained sound pressure output level was estimated...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29149722/effects-of-middle-ear-quasi-static-stiffness-on-sound-transmission-quantified-by-a-novel-3-axis-optical-force-sensor
#15
Ivo Dobrev, Jae Hoon Sim, Baktash Aqtashi, Alexander M Huber, Thomas Linder, Christof Röösli
BACKGROUND: Intra-operative quantification of the ossicle mobility could provide valuable feedback for the current status of the patient's conductive hearing. However, current methods for evaluation of middle ear mobility are mostly limited to the surgeon's subjective impression through manual palpation of the ossicles. This study investigates how middle ear transfer function is affected by stapes quasi-static stiffness of the ossicular chain. The stiffness of the middle ear is induced by a) using a novel fiber-optic 3-axis force sensor to quantify the quasi-static stiffness of the middle ear, and b) by artificial reduction of stapes mobility due to drying of the middle ear...
January 2018: Hearing Research
https://www.readbyqxmd.com/read/29105767/the-relationship-between-endolymphatic-hydrops-in-the-vestibule-and-low-frequency-air-bone-gaps
#16
Satofumi Sugimoto, Tadao Yoshida, Masaaki Teranishi, Yuriko Okazaki, Shinji Naganawa, Michihiko Sone
OBJECTIVES/HYPOTHESIS: To investigate the relationship between endolymphatic hydrops and hearing level, focusing on significant vestibular endolymphatic hydrops adjacent to the stapes footplate and low-frequency air-bone gaps. STUDY DESIGN: Retrospective study. METHODS: The study included 1,548 ears from 775 patients who underwent magnetic resonance imaging examination in our university hospital to investigate possible endolymphatic hydrops between January 2012 and December 2015...
November 6, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28989763/into-the-dark-patterns-of-middle-ear-adaptations-in-subterranean-eulipotyphlan-mammals
#17
Daisuke Koyabu, Misato Hosojima, Hideki Endo
Evolution of the middle ear ossicles was a key innovation for mammals, enhancing the transmission of airborne sound. Radiation into various habitats from a terrestrial environment resulted in diversification of the auditory mechanisms among mammals. However, due to the paucity of phylogenetically controlled investigations, how middle ear traits have diversified with functional specialization remains unclear. In order to identify the respective patterns for various lifestyles and to gain insights into fossil forms, we employed a high-resolution tomography technique and compared the middle ear morphology of eulipotyphlan species (moles, shrews and hedgehogs), a group that has radiated into various environments, such as terrestrial, aquatic and subterranean habitats...
September 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28920722/-comparative-evaluation-of-vertigo-in-patients-after-stapedotomy-and-stapedectomy
#18
Kinga Harmat, Gergely Thurén, László Simon, Nelli Nepp, Adrienn Németh, Imre Gerlinger, Péter Bakó
INTRODUCTION AND AIM: The reason of gradually developing conductive hearing loss in otosclerotic patients is the ossification of the stapes footplate to the surrounding bony structures and the therapy of stapes fixation is mainly surgical. In stapedotomy the footplate of the stapes is fenestrated with laser and microdrill in a diameter of 0.8 mm, whereas in stapedectomy there is complete removal of the footplate followed by the reconstruction of the ossicular chain. In the early postoperative period, temporary vertigo is frequently recorded which significantly influences the recovery...
September 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28846785/cerebrospinal-fluid-leak-during-stapes-surgery-gushing-leaks-and-oozing-leaks-two-different-phenomena
#19
Juan Luis Quesada, Giovanni Cammaroto, Lilla Bonanno, Francesco Galletti, Pedro Quesada
Cerebrospinal fluid (CSF) leak is an uncommon event that can occur during stapes surgery. Such leaks can be classified as gushing leaks (stapes gushers) and oozing leaks. A stapes gusher is a massive flow of CSF through the perforated footplate that fills the middle ear suddenly, while an oozing leak is a slower and less profuse flow. We conducted a retrospective, observational, multicenter study of 38 patients-23 men and 15 women, aged 23 to 71 years (mean: 47)-who had experienced a CSF leak during stapes surgery...
August 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28751512/flat-panel-angiography-in-the-cross-sectional-imaging-of-the-temporal-bone-assessment-of-image-quality-and-radiation-dose-compared-with-a-64-section-multisection-ct-scanner
#20
COMPARATIVE STUDY
G Conte, E Scola, S Calloni, R Brambilla, M Campoleoni, L Lombardi, F Di Berardino, D Zanetti, L M Gaini, F Triulzi, C Sina
BACKGROUND AND PURPOSE: Cross-sectional imaging of the temporal bone is challenging because of the complexity and small dimensions of the anatomic structures. We evaluated the role of flat panel angiography in the cross-sectional imaging of the temporal bone by comparing its image quality and radiation dose with a 64-section multisection CT scanner. MATERIALS AND METHODS: We retrospectively collected 29 multisection CT and 29 flat panel angiography images of normal whole-head temporal bones...
October 2017: AJNR. American Journal of Neuroradiology
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