La bibliothèque de Louvain-la-Neuve sera fermée les samedis jusque septembre.
Détail de l'auteur
Auteur Eric C. Bielefeld |
Documents disponibles écrits par cet auteur
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Faire une suggestion Affiner la rechercheInfluence of dose and duration of isoflurane anesthesia on the auditory brainstem response in the rat / Eric C. Bielefeld in International journal of audiology IJA, Vol.53, n°1-12 (January-December 2014)
Titre : Influence of dose and duration of isoflurane anesthesia on the auditory brainstem response in the rat Type de document : Article Auteurs : Eric C. Bielefeld Année de publication : 2014 Langues : Anglais (eng) Résumé : Objective: Isoflurane anesthesia can have significant effects on processing of sounds at the peripheral and central levels, manifesting in changes in auditory-evoked potentials. The current study tested whether duration of isoflurane anesthesia changes thresholds, amplitudes, and latencies of the auditory brainstem response (ABR). Design: The study tested ABRs in a rat animal model under isoflurane anesthesia. Study variables were duration of isoflurane anesthesia, stimulus frequency, stimulus level, and the dose of isoflurane. Rats were anesthetized with 1.5% or 2% isoflurane. ABRs were collected from 90 to 5 dB SPL at 5–40 kHz. Three full ABR series were collected over a 105-minute period. Thresholds were assigned, and ABR wave amplitudes and latencies were measured at each stimulus frequency and level. Study sample: Ten Sprague-Dawley rats were tested in a repeated measures design. Results: Statistical analyses revealed no significant effects of dose or duration on threshold, but a series of significant interactions between test variables for the amplitude and latency measurements. Conclusions: In the rat, dose and duration of isoflurane anesthesia induced inconsistent changes in latency and amplitude of the ABR. At 40 kHz, isoflurane dose had more powerful effects on latency and amplitude than occurred at other frequencies. Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=https://www.tandfonline.com/doi/full/10 [...] Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=254950
in International journal of audiology IJA > Vol.53, n°1-12 (January-December 2014)[article] Influence of dose and duration of isoflurane anesthesia on the auditory brainstem response in the rat [Article] / Eric C. Bielefeld . - 2014.
Langues : Anglais (eng)
in International journal of audiology IJA > Vol.53, n°1-12 (January-December 2014)
Résumé : Objective: Isoflurane anesthesia can have significant effects on processing of sounds at the peripheral and central levels, manifesting in changes in auditory-evoked potentials. The current study tested whether duration of isoflurane anesthesia changes thresholds, amplitudes, and latencies of the auditory brainstem response (ABR). Design: The study tested ABRs in a rat animal model under isoflurane anesthesia. Study variables were duration of isoflurane anesthesia, stimulus frequency, stimulus level, and the dose of isoflurane. Rats were anesthetized with 1.5% or 2% isoflurane. ABRs were collected from 90 to 5 dB SPL at 5–40 kHz. Three full ABR series were collected over a 105-minute period. Thresholds were assigned, and ABR wave amplitudes and latencies were measured at each stimulus frequency and level. Study sample: Ten Sprague-Dawley rats were tested in a repeated measures design. Results: Statistical analyses revealed no significant effects of dose or duration on threshold, but a series of significant interactions between test variables for the amplitude and latency measurements. Conclusions: In the rat, dose and duration of isoflurane anesthesia induced inconsistent changes in latency and amplitude of the ABR. At 40 kHz, isoflurane dose had more powerful effects on latency and amplitude than occurred at other frequencies. Disponible en ligne : Oui En ligne : https://login.ezproxy.vinci.be/login?url=https://www.tandfonline.com/doi/full/10 [...] Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=254950 Exemplaires (1)
Cote Support Localisation Section Disponibilité International journal of audiology IJA. Vol.53, n°1-12 (January-December 2014) Périodique papier Ixelles Rez Exclu du prêt Exemplaires (1)
Cote Support Localisation Section Disponibilité Ear and hearing. Vol.27, n° 1 (Février 2006) Périodique papier Ixelles Rez Exclu du prêt
Titre : Utility of the Vivosonic Integrity™ auditory brainstem response system as a hearing screening device for difficult-to-test children Type de document : Article Auteurs : Jacqueline Wiegers ; Eric C. Bielefeld ; Gail Whitelaw Année de publication : 2015 Article en page(s) : p. 282-288 Langues : Anglais (eng) Descripteurs : HE Vinci
Potentiels évoqués auditifs du tronc cérébral (ABR) ; Test auditifMots-clés : Vivosonic Résumé : Objective: Inability to complete a behavioral hearing screening is a challenge for children with developmental disorders or who are otherwise difficult to test, defined here as unable or unwilling to complete a behavioral screening. The study compared referral rates from screenings that used behavioral methods alone, with screenings that added a screen with the Vivosonic Integrity™ auditory brainstem response (ABR) device. Design: Behavioral screening was performed first. Those children who failed were re-screened with the Vivosonic Integrity ABR device. Changes in referral and screening completion rates after the second screening were calculated and analysed. Study sample: The participant population (n = 43) consisted of children with diagnosed developmental disorders. Results: Adding the Vivosonic Integrity to the screening protocol significantly increased the proportion of children who completed the screening, from 57% after behavioral screening to 81% after behavioral and ABR screening. The addition of the ABR screen did not change that overall pass/refer rate, in part because four participants who did not complete the behavioral screen received a ‘Refer’ outcome on the ABR screen. Conclusions: The results indicate that the Vivosonic Integrity device could be a useful tool for hearing screening of children who are difficult to screen using behavioral procedures. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=255209
in International journal of audiology IJA > Vol.54, n°1-12 (January-December 2015) . - p. 282-288[article] Utility of the Vivosonic Integrity™ auditory brainstem response system as a hearing screening device for difficult-to-test children [Article] / Jacqueline Wiegers ; Eric C. Bielefeld ; Gail Whitelaw . - 2015 . - p. 282-288.
Langues : Anglais (eng)
in International journal of audiology IJA > Vol.54, n°1-12 (January-December 2015) . - p. 282-288
Descripteurs : HE Vinci
Potentiels évoqués auditifs du tronc cérébral (ABR) ; Test auditifMots-clés : Vivosonic Résumé : Objective: Inability to complete a behavioral hearing screening is a challenge for children with developmental disorders or who are otherwise difficult to test, defined here as unable or unwilling to complete a behavioral screening. The study compared referral rates from screenings that used behavioral methods alone, with screenings that added a screen with the Vivosonic Integrity™ auditory brainstem response (ABR) device. Design: Behavioral screening was performed first. Those children who failed were re-screened with the Vivosonic Integrity ABR device. Changes in referral and screening completion rates after the second screening were calculated and analysed. Study sample: The participant population (n = 43) consisted of children with diagnosed developmental disorders. Results: Adding the Vivosonic Integrity to the screening protocol significantly increased the proportion of children who completed the screening, from 57% after behavioral screening to 81% after behavioral and ABR screening. The addition of the ABR screen did not change that overall pass/refer rate, in part because four participants who did not complete the behavioral screen received a ‘Refer’ outcome on the ABR screen. Conclusions: The results indicate that the Vivosonic Integrity device could be a useful tool for hearing screening of children who are difficult to screen using behavioral procedures. Disponible en ligne : Non Permalink : https://bib.vinci.be/opac_css/index.php?lvl=notice_display&id=255209 Exemplaires (1)
Cote Support Localisation Section Disponibilité International journal of audiology IJA. Vol.54, n°1-12 (January-December 2015) Périodique papier Ixelles Rez Exclu du prêt
