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5%), 6 (4.7%), 84 (65.6%), 18 (14.0%), and 13 (10.2%) patients, respectively. The presence of the EAC type could be predicted by preoperative CT while the other four types could be predicted by binning into two groups, with a sensitivity of 0.61 and specificity of 0.72.
The variable anatomy of the chorda tympani nerve can be classified into five major groups based on endoscopic tympanotomy.
The variable anatomy of the chorda tympani nerve can be classified into five major groups based on endoscopic tympanotomy.
Objective measurements may assist in indicating cochlear implants and in predicting outcomes of cochlear implantation surgery. Using electrically evoked compound action potentials (ECAP), information about the function of the auditory nerve can be obtained by analyzing responses to electrical stimulation transmitted and derived by the recording electrode. The aim of this study was to determine whether ECAP characteristics differ depending on the stimulated intracochlear region and the size of the cochlea.
Retrospective cohort study.
University Medical center, tertiary academic referral center.
Patients undergoing cochlear implant surgery between 2015 and 2018.
Cochlear implantation with FLEXsoft electrode arrays (length 31.5 mm, 12 stimulating channels).
The cochlear duct length (CDL) and the cochlear coverage (CC) were measured using a new computed tomography-based software and correlated to the postoperative speech performance. Additionally, ECAP were measured and associated to the CDL.
A totaination of objective measurements such as anatomical parameters and ECAPs are helpful to assist the postoperative fitting and are promising tools to improve patient care.
To derive normative data based on postgraduate year (PGY) and number of completed otology rotations using a validated tool for cochlear implant surgical competency assessment.
Prospective, blinded validation study.
Otolaryngology-Head and Neck Surgery residency training program at a tertiary academic medical center.
Fourteen unique otolaryngology trainees, ranging from PGY-1 to PGY-6, were assessed a total of 26 times in a temporal bone laboratory setting using a validated assessment tool for cochlear implantation.
Construct validity, internal consistency, and inter-rater reliability.
Inter-rater reliability was calculated using the Cohen's kappa. Overall agreement between raters was excellent (κ = 0.82). Construct validity was supported by a positive association between higher task-based checklist and global rating scale scores with both trainee PGY level and number of otology rotations completed. Time to complete the exercise was inversely associated with PGY level and number of otology rotations completed.
Herein, we build upon a previously validated instrument to provide a method to reliably assess surgical competency in a core otologic procedure among residents across the training continuum. This data can be used to provide objective feedback on overall and task-specific competency in cochlear implantation to identify surgical deficiencies early on and to guide supportive course correction.
Herein, we build upon a previously validated instrument to provide a method to reliably assess surgical competency in a core otologic procedure among residents across the training continuum. This data can be used to provide objective feedback on overall and task-specific competency in cochlear implantation to identify surgical deficiencies early on and to guide supportive course correction.
Though fluctuations in vestibular function represent a common finding in Menière's disease, we describe how benign paroxysmal positional vertigo (BPPV) may result in fluctuations of vestibulo-ocular reflex for the involved canal depending on the disposition of otoliths.
A 54-year-old woman suffering from refractory posterior canal (PC)-BPPV resulting in fluctuating PC function.
Diagnostic evaluation and rehabilitative treatment for BPPV involving the affected PC.
Video-Frenzel and video-head impulse test (vHIT) findings before and after canalith repositioning procedures for PC-BPPV.
BPPV involving the nonampullary arm of right PC was diagnosed based on presenting positional downbeat nystagmus and selective right PC hypofunction at the vHIT. During physical treatment, nystagmus first became positional paroxysmal upbeat likely due to a shift of debris into the ampullary arm of the canal, then turned to spontaneous downbeat nystagmus consistently with a plug effect exerted by particles entrapped withinyed a role facilitating otoliths mobilization by reducing labyrinthine impedance.
This report describes a case of development of radiologic superior semicircular canal dehiscence and reviews the literature for pertinent clinical and radiologic findings in patients with superior semicircular canal dehiscence syndrome (SCDS).
A 28-year-old man presented with auditory and vestibular symptoms of SCDS and underwent a high-resolution temporal bone computed tomography scan that showed frank dehiscence of the right superior semicircular canal. Diagnosis of SCDS was further verified with audiometric and cervical vestibular-evoked myogenic potential (cVEMP) thresholds. The patient had previously undergone a computed tomography scan 12 years prior for work-up of sudden sensorineural hearing loss that showed no evidence of superior semicircular canal dehiscence bilaterally.
A combination of diagnostic and therapeutic interventions was conducted consisting of preoperative audiometric and cVEMP thresholds, followed by middle fossa craniotomy for surgical repair of the dehiscence.
Postoperative aion of superior canal dehiscence, and better elucidate the relationship between development/ progression of superior canal dehiscence and onset of clinical symptoms.Hirsch, SM, Chapman, CJ, Frost, DM, and Beach, TAC. Mechanical energy expenditure at lumbar spine and lower extremity joints during the single-leg squat is affected by the nonstance foot position. J Strength Cond Res XX(X) 000-000, 2020-Previous research has shown that discrete kinematic and kinetic quantities during bodyweight single-leg squat (SLS) movements are affected by elevated foot positioning and sex of the performer, but generalizations are limited by the high-dimensional data structure reported. Using a 3D inverse dynamical linked-segment model, we quantified mechanical energy expenditure (MEE) at each joint in the kinetic chain, the total MEE (sum of MEE across aforesaid joints), and the relative contribution of each joint to total MEE during SLSs performed with elevated foot positioned beside stance leg (SLS-Side), and in-front of (SLS-Front) and behind (SLS-Back) the body. https://www.selleckchem.com/products/deferiprone.html Total MEE differed between SLS variations (p = 0.002), with the least amount observed in the SLS-Back (effect size [ES] = 0.
