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https://www.readbyqxmd.com/read/28224320/forward-masking-in-cochlear-implant-users-electrophysiological-and-psychophysical-data-using-pulse-train-maskers
#1
Youssef Adel, Gaston Hilkhuysen, Arnaud Noreña, Yves Cazals, Stéphane Roman, Olivier Macherey
Electrical stimulation of auditory nerve fibers using cochlear implants (CI) shows psychophysical forward masking (pFM) up to several hundreds of milliseconds. By contrast, recovery of electrically evoked compound action potentials (eCAPs) from forward masking (eFM) was shown to be more rapid, with time constants no greater than a few milliseconds. These discrepancies suggested two main contributors to pFM: a rapid-recovery process due to refractory properties of the auditory nerve and a slow-recovery process arising from more central structures...
February 21, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28213133/the-relation-between-ecap-measurements-and-the-effect-of-rate-on-behavioral-thresholds-in-cochlear-implant-users
#2
Colette M McKay, Nicholas Smale
It has been shown that electrically evoked compound action potential (ECAP) thresholds are not sufficiently predictive of behavioral thresholds to allow their use as a totally objective method to program a cochlear implant. Previous animal studies have shown that two other ECAP parameters (the ECAP amplitude growth slope and the effect on ECAPs of changing the phase duration (PD) or interphase gap (IPG)), and the way that behavioral thresholds change with increasing rate of stimulation, are associated with cochlear health...
February 14, 2017: Hearing Research
https://www.readbyqxmd.com/read/28207576/relationship-between-peripheral-and-psychophysical-measures-of-amplitude-modulation-detection-in-cochlear-implant-users
#3
Viral D Tejani, Paul J Abbas, Carolyn J Brown
OBJECTIVE: This study investigates the relationship between electrophysiological and psychophysical measures of amplitude modulation (AM) detection. Prior studies have reported both measures of AM detection recorded separately from cochlear implant (CI) users and acutely deafened animals, but no study has made both measures in the same CI users. Animal studies suggest a progressive loss of high-frequency encoding as one ascends the auditory pathway from the auditory nerve to the cortex...
February 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28183668/effect-of-equal-channel-angular-pressing-on-in-vitro-degradation-of-lae442-magnesium-alloy
#4
Peter Minárik, Eva Jablonská, Robert Král, Jan Lipov, Tomáš Ruml, Carsten Blawert, Branislav Hadzima, František Chmelík
Effect of processing by equal channel angular pressing (ECAP) on the degradation behaviour of extruded LAE442 magnesium alloy was investigated in a 0.1M NaCl solution, Kirkland's biocorrosion medium (KBM) and Minimum Essential Medium (MEM), both with and without 10% of foetal bovine serum (FBS). Uniform degradation of as extruded and ECAP processed samples in NaCl solution was observed, nevertheless higher corrosion resistance was found in the latter material. The increase of corrosion resistance due to ECAP was observed also after 14-days immersion in all media used...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28183580/effect-of-total-intravenous-vs-volatile-anesthetics-on-intraoperatively-acquired-electrically-evoked-compound-action-potential-in-children-undergoing-cochlear-implant-surgery-a-randomized-prospective-study
#5
Ala A Alhowary, Khaled El-Radaideh, Anas Al-Rusan, Diab Bani Hani, Wail Khraise, Ahmad Al Omari, Firas Alzoubi
OBJECTIVE: The purpose of the present study was to compare the effects of inhalational anesthesia to those of total intravenous anesthesia on intraoperative electrically evoked compound action potential (e-ECAP) thresholds in children undergoing cochlear implantation. STUDY DESIGN: Randomized prospective study. SETTING: Tertiary referral teaching hospital. PATIENTS: Forty children aged 6 months to 17years with bilateral severe-to-profound sensorineural hearing loss and undergoing cochlear implantation were enrolled in the study...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28182031/allergies-in-urban-versus-countryside-settings-in-poland-as-part-of-the-epidemiology-of-the-allergic-diseases-in-poland-ecap-study-challenge-the-early-differential-diagnosis
#6
Edyta Krzych-Fałta, Konrad Furmańczyk, Barbara Piekarska, Aneta Tomaszewska, Adam Sybilski, Bolesław K Samoliński
INTRODUCTION: The incidence of allergies depends on a number of factors, including adopting an urban "western" lifestyle, genetic predispositions, and different regions of residence. AIM: To compare the prevalence of allergic conditions (seasonal allergic rhinitis (SAR) and perennial allergic rhinitis (PAR), bronchial asthma (BA), atopic dermatitis (AD)) in a group of countryside versus urban residents in Poland. MATERIAL AND METHODS: The prevalence of allergic conditions in urban versus countryside settings was assessed using the translated and approved questionnaire developed for international ECRHS II and ISAAC studies...
October 2016: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28097427/25th-anniversary-of-ecap-the-origins-of-the-journal
#7
EDITORIAL
Helmut Remschmidt, Philip Graham
No abstract text is available yet for this article.
February 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28068623/processing-and-mechanical-characteristics-of-magnesium-hydroxyapatite-metal-matrix-biocomposites
#8
R Del Campo, B Savoini, A Muñoz, M A Monge, R Pareja
Magnesium/hydroxyapatite composites were produced by conventional extrusion and their mechanical behavior studied under uniaxial compression at room temperature. The results evidence the capability of the HA for strengthening the Mg material, lowering its microstructural anisotropy and inhibiting deformation twinning. They also reveal that the ECAP processing is effective for improving the grain structure and reducing the crystallographic texture of these composites, giving rise to a significant enhancement of their yield strength and microhardness although the ultimate compressive stress worsens...
December 24, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28063103/gentamicin-eluting-titanium-dioxide-nanotubes-grown-on-the-ultrafine-grained-titanium
#9
Sima Hashemi Nemati, Afra Hadjizadeh
Titanium (Ti)-based materials is the most appropriate choices for the applications as orthopedic and dental implants. In this regard, ultrafine-grained (UFG) titanium with an enhanced mechanical properties and surface energy has attracted more attention. Titanium dioxide (TiO2) nanotubes grown on the titanium could enhance bone bonding, cellular response and are good reservoirs for loading drugs and antibacterial agents. This article investigates gentamicin loading into and release from the TiO2 nanotubes, grown on the UFG compared to coarse-grained (CG) titanium substrate surfaces...
January 6, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28045836/effects-of-stimulus-polarity-and-artifact-reduction-method-on-the-electrically-evoked-compound-action-potential
#10
Michelle L Hughes, Jenny L Goehring, Jacquelyn L Baudhuin
OBJECTIVE: Previous research from our laboratory comparing electrically evoked compound action potential (ECAP) artifact reduction methods has shown larger amplitudes and lower thresholds with cathodic-leading forward masking (CathFM) than with alternating polarity (AltPol). One interpretation of this result is that the anodic-leading phase used with AltPol elicits a less excitatory response (in contrast to results from recent studies with humans), which when averaged with responses to cathodic-leading stimuli, results in smaller amplitudes...
December 30, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28012529/cone-beam-computed-tomography-in-children-with-cochlear-implants-the-effect-of-electrode-array-position-on-ecap
#11
Marine Lathuillière, Fanny Merklen, Jean-Pierre Piron, Marielle Sicard, Françoise Villemus, Nicolas Menjot de Champfleur, Frédéric Venail, Alain Uziel, Michel Mondain
OBJECTIVES: To assess the feasibility of using cone-beam computed tomography (CBCT) in young children with cochlear implants (CIs) and study the effect of intracochlear position on electrophysiological and behavioral measurements. METHODS: A total of 40 children with either unilateral or bilateral cochlear implants were prospectively included in the study. Electrode placement and insertion angles were studied in 55 Cochlear(®) implants (16 straight arrays and 39 perimodiolar arrays), using either CBCT or X-ray imaging...
January 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27900916/electrically-evoked-compound-action-potentials-are-different-depending-on-the-site-of-cochlear-stimulation
#12
Paul van de Heyning, Santiago L Arauz, Marcus Atlas, Wolf-Dieter Baumgartner, Marco Caversaccio, Ronel Chester-Browne, Patricia Estienne, Javier Gavilan, Benoit Godey, Wolfgang Gstöttner, Demin Han, Rudolph Hagen, Martin Kompis, Vlad Kuzovkov, Luis Lassaletta, Franc Lefevre, Yongxin Li, Joachim Müller, Lorne Parnes, Andrea Kleine Punte, Christopher Raine, Gunesh Rajan, Adriana Rivas, José Antonio Rivas, Nicola Royle, Georg Sprinzl, Kurt Stephan, Adam Walkowiak, Yuri Yanov, Kim Zimmermann, Patrick Zorowka, Henryk Skarzynski
One of the many parameters that can affect cochlear implant (CI) users' performance is the site of presentation of electrical stimulation, from the CI, to the auditory nerve. Evoked compound action potential (ECAP) measurements are commonly used to verify nerve function by stimulating one electrode contact in the cochlea and recording the resulting action potentials on the other contacts of the electrode array. The present study aimed to determine if the ECAP amplitude differs between the apical, middle, and basal region of the cochlea, if double peak potentials were more likely in the apex than the basal region of the cochlea, and if there were differences in the ECAP threshold and recovery function across the cochlea...
November 2016: Cochlear Implants International
https://www.readbyqxmd.com/read/27888314/capillary-coating-as-an-important-factor-in-optimization-of-the-off-line-and-on-line-mekc-assays-of-the-highly-hydrophobic-enzyme-chlorophyllase
#13
Paweł Mateusz Nowak, Michał Woźniakiewicz, Maciej Michalik, Leszek Fiedor, Paweł Kościelniak
The choice between bare and coated capillaries is a key decision in the development and use of any methods based on capillary electrophoresis. In this work several permanently and dynamically coated capillaries were successfully implemented in a previously developed micellar electrokinetic chromatography (MEKC) assay of the plant membrane enzyme chlorophyllase. The results obtained demonstrate the rationale behind the use of capillary coating, which is crucial for successful optimization of both the off-line mode and the on-line/electrophoretically mediated microanalysis assay mode...
February 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27837215/-objective-measures-for-setting-the-processors-of-cochlear-implant-systems-use-of-discrimination-functions-and-consideration-of-electrode-profiles
#14
S Hoth, I Herisanu, M Praetorius
BACKGROUND: When setting the electrical stimulation level of cochlear implants during individual adjustment of the speech processor, especially in children, objective measures such as intracochlearly measured electrically evoked compound action potentials (eCAP) and intraoperative observation of electrically elicited stapedial reflexes (eSR) are indispensable. The benefit of these objective measures is based on the correlation between the derived response thresholds and psychometric data...
December 2016: HNO
https://www.readbyqxmd.com/read/27804133/systematic-review-of-compound-action-potentials-as-predictors-for-cochlear-implant-performance
#15
REVIEW
Ruben H M van Eijl, Patrick J Buitenhuis, Inge Stegeman, Sjaak F L Klis, Wilko Grolman
OBJECTIVES/HYPOTHESIS: The variability in speech perception between cochlear implant users is thought to result from the degeneration of the auditory nerve. Degeneration of the auditory nerve, histologically assessed, correlates with electrophysiologically acquired measures, such as electrically evoked compound action potentials (eCAPs) in experimental animals. To predict degeneration of the auditory nerve in humans, where histology is impossible, this paper reviews the correlation between speech perception and eCAP recordings in cochlear implant patients...
February 2017: Laryngoscope
https://www.readbyqxmd.com/read/27683771/psychological-profile-of-patients-eligible-for-bariatric-surgery
#16
Graziela Aparecida Nogueira de Almeida Ribeiro, Helenice Brizolla Giampietro, Lídia Barbieri Belarmino, Wilson Salgado-Júnior
Background: The psychologist who works in bariatric surgery has a role to receive, evaluate, prepare and educate the patient who will undergo the surgical procedure. Psychological evaluation becomes important in so far as allows us to obtain data on personal and familiar history and allow tracing of possible psychopathology. Aim: To collect data on psychological evaluations of patients in a bariatric surgery service of a public hospital in order to describe the psychological profile of patients in this service...
2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
https://www.readbyqxmd.com/read/27672066/persons-with-allergy-symptoms-use-alternative-medicine-more-often
#17
Anna Kłak, Filip Raciborski, Edyta Krzych-Fałta, Dagmara Opoczyńska-Świeżewska, Jakub Szymański, Agnieszka Lipiec, Barbara Piekarska, Adam Sybilski, Aneta Tomaszewska, Bolesław Samoliński
INTRODUCTION: The aim of the study is to indicate the relation between the use of alternative medicine and the occurrence of allergic diseases in the Polish population of adults in the age of 20-44 years. Moreover the additional aim of the study is to define the relation between the sex, age and place of living and the use of alternative medicine. MATERIAL AND METHODS: The data from the project Epidemiology of Allergic Diseases in Poland (ECAP) has been used for analysis...
2016: Pneumonologia i Alergologia Polska
https://www.readbyqxmd.com/read/27670607/mechanistic-and-evolutionary-insights-from-comparative-enzymology-of-phosphomonoesterases-and-phosphodiesterases-across-the-alkaline-phosphatase-superfamily
#18
Fanny Sunden, Ishraq AlSadhan, Artem Y Lyubimov, Susanne Ressl, Helen Wiersma-Koch, Jamar Borland, Clayton L Brown, Tory A Johnson, Zorawar Singh, Daniel Herschlag
Naively one might have expected an early division between phosphate monoesterases and diesterases of the alkaline phosphatase (AP) superfamily. On the contrary, prior results and our structural and biochemical analyses of phosphate monoesterase PafA, from Chryseobacterium meningosepticum, indicate similarities to a superfamily phosphate diesterase [Xanthomonas citri nucleotide pyrophosphatase/phosphodiesterase (NPP)] and distinct differences from the three metal ion AP superfamily monoesterase, from Escherichia coli AP (EcAP)...
November 2, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27660874/nasal-patency-in-poles-in-the-light-of-research-as-part-of-the-project-on-epidemiology-of-allergic-diseases-in-poland
#19
Edyta Krzych-Fałta, Konrad Furmanczyk, Bolesław Samolinski, Barbara Piekarska, Piotr Samel-Kowalik, Agnieszka Lipiec, Filip Raciborski, Adam Sybilski
OBJECTIVE: The aim of this study was to estimate the reference values for nasal inspiratory flow in the study population in Poland as part of the project on Epidemiology of Allergic Diseases in Poland (ECAP). MATERIALS AND METHOD: The study subjects were a group of 4,137 people: 1,136 children aged 6-7 years (561 girls and 575 boys), 1,123 adolescents aged 13-14 years (546 girls, 577 boys) and 1,878 adults (1,145 women, 733 men), residing in seven large Polish cities...
September 2016: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/27569021/rates-of-major-complications-during-neoadjuvant-and-adjuvant-chemotherapy-for-early-breast-cancer-an-off-study-population
#20
S Redana, A Sharp, H Lote, K Mohammed, E Papadimitraki, M Capelan, A Ring
OBJECTIVES: To determine the incidence and risk factors for thromboembolic events (TE) and febrile neutropenia (FN) in patients receiving systemic chemotherapy for early breast cancer (EBC). METHODS: 325 patients received FEC75, FEC100-T or ECaP for EBC in 2013. RESULTS: TE occurred in 7.4% and FN in 19.1% of patients. Risk factors for TE were: central venous catheter (p = 0.011). Risk factors for FN were: FEC100-T treatment versus FEC75 and ECaP (p ≤ 0...
December 2016: Breast: Official Journal of the European Society of Mastology
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