caa a22 4500 606185453 CHVBK 20210128100831.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00405-014-3202-4 doi (NATIONALLICENCE)springer-10.1007/s00405-014-3202-4 Thermal effects of cold light sources used in otologic surgery [Elektronische Daten] [Fadlullah Aksoy, Remzi Dogan, Orhan Ozturan, Sabri Eren, Bayram Veyseller, Ozge Gedik] The objective of this study was to investigate the thermal effects of cold light sources and endoscopes on the inner ear. 25 male guinea pigs were assigned equally to five groups (1: Halogen—1min, 2: Halogen—5min, 3: Xenon—1min, 4: Xenon—5min, 5: Controls). After both bullae of the guinea pigs were opened, light sources and endoscopes were positioned in the middle ears of the first four groups for specific time periods. DPOAE and ABR tests were conducted on all animals at the beginning of the study, at the end of surgery, and 2h after surgery. The temperatures of cold light sources were measured by a thermocouple thermometer, and the surface temperatures of the endoscopes were measured by an infrared thermometer. DPOAE and ABR measurements performed right after and 2h after surgery in group 1, 2, 3, and 5 did not reveal any significant difference. In group 4, DPOAE values were significantly lower and ABR threshold values were significantly higher than those in the other groups, right after and 2h after surgery. Thermocouple thermometer readings showed that, after the first minute, the Xenon light source generated significantly more temperature rise than the Halogen light source. The surface temperatures of all endoscopes returned to normal approximately 1min after light sources were turned off. Our study demonstrated that when an endoscope using a Xenon light source was applied to the middle ear for a specific time periods, inner ear functions deteriorated, as reflected by audiologic tests. Springer-Verlag Berlin Heidelberg, 2014 ABR nationallicence Cold light sources nationallicence DPOAE nationallicence Otology nationallicence Thermal effects nationallicence Aksoy Fadlullah Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut Dogan Remzi Department of Otorhinolaryngology, Bayrampaşa State Hospital, Bayrampasa, Istanbul, Turkey aut Ozturan Orhan Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut Eren Sabri Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut Veyseller Bayram Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut Gedik Ozge Department of Audiology, Faculty of Health Sciences, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/10(2015-10-01), 2679-2687 0937-4477 272:10<2679 2015 272 405 https://doi.org/10.1007/s00405-014-3202-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-014-3202-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aksoy Fadlullah Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut NATIONALLICENCE 700 1- Dogan Remzi Department of Otorhinolaryngology, Bayrampaşa State Hospital, Bayrampasa, Istanbul, Turkey aut NATIONALLICENCE 700 1- Ozturan Orhan Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut NATIONALLICENCE 700 1- Eren Sabri Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut NATIONALLICENCE 700 1- Veyseller Bayram Department of Otorhinolaryngology, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut NATIONALLICENCE 700 1- Gedik Ozge Department of Audiology, Faculty of Health Sciences, Bezmialem Vakif University, Fatih, Istanbul, Turkey aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/10(2015-10-01), 2679-2687 0937-4477 272:10<2679 2015 272 405