TY - JOUR A1 - Mertens, Griet A1 - Andries, Ellen A1 - Kurz, Anja A1 - Tȧvora-Vieira, Dayse A1 - Calvino, Miryam A1 - Amann, Edda A1 - Anderson, Ilona A1 - Lorens, Artur T1 - Towards a consensus on an ICF-based classification system for horizontal sound-source localization JF - Journal of Personalized Medicine N2 - The study aimed to develop a consensus classification system for the reporting of sound localization testing results, especially in the field of cochlear implantation. Against the background of an overview of the wide variations present in localization testing procedures and reporting metrics, a novel classification system was proposed to report localization errors according to the widely accepted International Classification of Functioning, Disability and Health (ICF) framework. The obtained HEARRING_LOC_ICF scale includes the ICF graded scale: 0 (no impairment), 1 (mild impairment), 2 (moderate impairment), 3 (severe impairment), and 4 (complete impairment). Improvement of comparability of localization results across institutes, localization testing setups, and listeners was demonstrated by applying the classification system retrospectively to data obtained from cohorts of normal-hearing and cochlear implant listeners at our institutes. The application of our classification system will help to facilitate multi-center studies, as well as allowing better meta-analyses of data, resulting in improved evidence-based practice in the field. KW - sound localization KW - binaural hearing KW - cochlear implant KW - interaural level difference KW - interaural time difference KW - single-sided deafness KW - unilateral hearing loss KW - testing-method consensus KW - classification KW - ICF Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-297319 SN - 2075-4426 VL - 12 IS - 12 ER - TY - THES A1 - Kretzer, Katharina T1 - Einfluss der Form elektrischer Impulse auf die intracochleäre neuronale Antwort bei Cochlea-Implantat-Trägern: triphasische Pulse mit anodischer und kathodischer zweiter Phase T1 - Influence of the shape of electrical pulses on the intracochlear neural response in cochlear implant recipients: triphasic pulses with anodic and cathodic second phase N2 - Vorliegende Arbeit beschäftigte sich mit der Verbesserung von Defiziten der elektrischen Stimulation durch Cochlea Implantate (CI) mit alternativen Pulsformen. Dabei wurde mit elektrophysiologischen und psychophysikalischen Methoden untersucht, wie sich die Pulsformen auf die Effektivität der Stimulation auswirken. Es wurden präzisions-triphasische Pulse (pTP) mit anodischer und kathodischer zweiter Phase anhand der Daten von elf Probanden untersucht. Im Rahmen der objektiven elektrophysiologischen Messung wurde mit den unterschiedlichen Formen des pTP an drei unterschiedlichen Kontaktpositionen auf den CI-Elektrodenträgern stimuliert, und die Stärke der jeweils evozierten neuronalen Antwort aufgezeichnet. Der subjektive psychophysikalische Test diente dazu, die pulsformspezifischen Hörschwellen zu bestimmen und wurde an zwei unterschiedlichen Kontakten auf den CI-Elektrodenträgern durchgeführt. Dabei erzielten pTP, welche eine symmetrisch-triphasische Pulsform aufwiesen, geringere neuronale Antwortstärken und höhere Hörschwellen als die pTP, die einer biphasischen Pulsform glichen. Diejenigen pTP, die biphasischen Pulsen mit anodischer erster Phase glichen, erzielten dabei die höchsten neuronalen Antwortstärken und die niedrigsten Hörschwellen. N2 - Present work dealt with the improvement of deficits of electrical stimulation by cochlear implants (CI) by means of alternative pulse shapes. This involved the use of electrophysiological und psychophysical methods to investigate the effect of pulse shape on the effectiveness of stimulation. Precision-triphasic pulses (pTP) with anodic and cathodic second phase were examined using data from eleven subjects. In the objective electrophysiological measurement, the different shapes of the pTP were stimulated from three different contact positions on the CI electrode arrays and the strength of the neural response evoked in each case was recorded. In the subjective psychophysical test, pTP stimulation was performed from two different contact positions on the CI electrode arrays and the pulse shape-specific detection thresholds were compared. The results showed that pTP, which exhibited a symmetric-triphasic pulse shape, achieved lower neuronal response strengths and higher detection thresholds than pTP that resembled a biphasic pulse shape. Those pTP, that resembled biphasic pulses with an anodic first phase, achieved the highest neuronal response strengths and the lowest detection thresholds. KW - Cochlear-Implantat KW - Elektrophysiologie KW - Psychophysik KW - elektrische Stimulation KW - cochlear implant KW - electrical stimulation KW - psychophysics KW - electrophysiology Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-281650 ER - TY - JOUR A1 - Rajeswaran, Ranjith A1 - Tavora-Vieira, Dayse A1 - Mertens, Griet A1 - Dillon, Margaret A1 - Narayan, Saranya A1 - Kameswaran, Mohan A1 - Kurz, Anja T1 - Audiological practice and COVID-19: recommendations that audiological centers can use to maintain the safety and quality of service-expert opinion JF - European Archives of Oto-Rhino-Laryngology N2 - Purpose Audiology is an essential service for some patient groups and some interventions. This article sets forth experience-based recommendations for how audiological centers can continue to safely and effectively function during COVID-19. Methods The recommendations are the result of panel discussion and are based on the clinical experience of the panelists/authors. Results The recommendations cover which patient groups and which interventions should be treated when and whether this can be performed in the clinic or remotely; how to maintain the safety of workplace via optimizing patient flow within the clinic and the sanitation of rooms and equipment; and overcoming communication challenges that COVID-19 intensifies. Conclusion For essential audiological services to continue under COVID-19, safety measures must be implemented and maintained, and treatment and communication strategies must be adapted to offset communication difficulties due to personal protective equipment (PPE) and social distancing and to bolster patient confidence. In short, it is vital that staff feel safe, that patients either feel the clinic is safe enough to visit or that remote treatment may be an option, and that clinics and patients have a broad agreement on the urgency of any needed service. We hope that these recommendations help clinics effectively accomplish these goals. KW - remote care/telehealth KW - COVID-19 KW - audiological services KW - cochlear implant KW - hearing aid KW - triage Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-266774 SN - 1434-4726 VL - 279 IS - 3 ER -