caa a22 4500 477086640 CHVBK 20180405111505.0 cr unu---uuuuu 170330e19960501xx s 000 0 eng 10.1007/BF00171127 doi (NATIONALLICENCE)springer-10.1007/BF00171127 Experimental and clinical results of fiberoptic argon laser stapedotomy [Elektronische Daten] [R. Häusler, A. Messerli, V. Romano, R. Burkhalter, H. Weber, H. Altermatt] Since 1992 a small air-cooled opthalmological argon laser (Augus system, 3 W max.) equipped with a fiberoptic microhandpiece has been used for stapedotomy at the Inselspital, Berne. The microhandpiece has been developed especially for otological purposes in our electronic laboratory. In order to measure the effect of argon laser pulses applied through the handpiece to the ear, we performed temperature measurements in a saline-filled inner ear model by using ultrathin (2 μm thick), ultrafast (4 ns) thermosensitive rhodamine-coated polyurethane films. Multiple laser pulses of 1-2.5 W and 0.1 s duration — as used in clinical applications — produced a temperature elevation of about 1 ° C in the liquid of the inner ear model. The local laser effect was then examined histologically on the isolated stapes. The thermal damage zone around the stapedotomy perforation was limited to about 100 μm. In a clinical study we compared the results of argon laser stapedotomy (n = 54) with those of a skeeter microdrill stapedotomy (n = 29). Substantial hearing gains were found in all cases in both groups. In the laser stapedotomy group the mean residual air-bone gap (0.5-2 kHz) was 10 dB or less in all cases but one. Inner ear function remained unchanged except for a 40-dB loss at 4000 Hz in one case. Transient vertigo with nystagmus occurred in one case. Facial nerve dysfunction did not occur in any patient. The most important advantage of the laser found was the absence of mechanical trauma to the stapes. Stapes luxation and a floating footplate were avoided. In contrast, thick footplates were more easily perforated with the skeeter. Use of an argon laser equipped with a fiberoptic microhandpiece and a skeeter microdrill as needed seems particularly advantageous for stapedotomy. Springer-Verlag, 1996 Fiberoptic argon laser stapedotomy nationallicence Skeeter microdrill stapedotomy nationallicence Inner ear nationallicence Temperature measurements nationallicence Argon laser-induced thermal injury nationallicence Häusler R. University Clinic for Otolaryngology, Head and Neck Surgery, Inselspital, Berne, Switzerland aut Messerli A. University Clinic for Otolaryngology, Head and Neck Surgery, Inselspital, Berne, Switzerland aut Romano V. Institute for Applied Physics, University of Berne, Berne, Switzerland aut Burkhalter R. Laboratory of Electronics, Inselspital, Berne, Switzerland aut Weber H. Institute for Applied Physics, University of Berne, Berne, Switzerland aut Altermatt H. Pathology Institute, University of Berne, Berne, Switzerland aut European Archives of Oto-Rhino-Laryngology Springer-Verlag 253/4-5(1996-05-01), 193-200 0937-4477 253:4-5<193 1996 253 405 https://doi.org/10.1007/BF00171127 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00171127 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Häusler R. University Clinic for Otolaryngology, Head and Neck Surgery, Inselspital, Berne, Switzerland aut NATIONALLICENCE 700 1- Messerli A. University Clinic for Otolaryngology, Head and Neck Surgery, Inselspital, Berne, Switzerland aut NATIONALLICENCE 700 1- Romano V. Institute for Applied Physics, University of Berne, Berne, Switzerland aut NATIONALLICENCE 700 1- Burkhalter R. Laboratory of Electronics, Inselspital, Berne, Switzerland aut NATIONALLICENCE 700 1- Weber H. Institute for Applied Physics, University of Berne, Berne, Switzerland aut NATIONALLICENCE 700 1- Altermatt H. Pathology Institute, University of Berne, Berne, Switzerland aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer-Verlag 253/4-5(1996-05-01), 193-200 0937-4477 253:4-5<193 1996 253 405 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer