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Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery

BACKGROUND AND OBJECTIVES: A free-beam-type CO(2) laser, which use a micromanipulator mounted on a microscope as the delivery system, has the merit of not being affected by hand tremor at the time of shooting. However, this delivery system has several disadvantages, including a restricted operation...

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Autores principales: Chang, Mun Young, Choi, Hyun Seok, Lee, Sang-Youp, Koo, Ja-Won
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Korean Audiological Society 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5516696/
https://www.ncbi.nlm.nih.gov/pubmed/28704897
http://dx.doi.org/10.7874/jao.2017.21.2.103
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author Chang, Mun Young
Choi, Hyun Seok
Lee, Sang-Youp
Koo, Ja-Won
author_facet Chang, Mun Young
Choi, Hyun Seok
Lee, Sang-Youp
Koo, Ja-Won
author_sort Chang, Mun Young
collection PubMed
description BACKGROUND AND OBJECTIVES: A free-beam-type CO(2) laser, which use a micromanipulator mounted on a microscope as the delivery system, has the merit of not being affected by hand tremor at the time of shooting. However, this delivery system has several disadvantages, including a restricted operation range and a risk of incorrect focusing. A fiber-type CO(2) laser uses a hand-held delivery system and has the opposite merits and demerits. We compared the results of stapes surgery with free-beam and fiber type delivery systems. SUBJECTS AND METHODS: The study enrolled 36 patients who underwent stapedotomy with free-beam- (n=26) or fiber- (n=10) type CO(2) lasers. The air-bone (AB) gap closure, bone conduction (BC) change, and operating time were evaluated. The AB gap closure was calculated by subtracting the preoperative BC thresholds from the postoperative air conduction thresholds. The BC change was calculated by subtracting the postoperative BC thresholds from the preoperative BC thresholds. RESULTS: The mean operating time was significantly (p=0.035) shorter in the fiber-type group (72.5±8.2 min) than in the free-beam-type group (80.5±11.4 min). The mean AB gap closure did not differ significantly (p=0.297) between the free-beamand fiber-type groups (5.8±10.1 and 1.4±6.8 dB, respectively). The mean BC change did not differ significantly (p=0.873) between the free-beam- and fiber-type groups (2.4±6.9 and 2.8±5.3 dB, respectively). The hearing outcomes did not differ significantly between the two groups. CONCLUSIONS: Operating times were significantly shorter using the fiber-type CO(2) laser, while hearing outcomes did not differ significantly between the two groups.
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spelling pubmed-55166962017-07-26 Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery Chang, Mun Young Choi, Hyun Seok Lee, Sang-Youp Koo, Ja-Won J Audiol Otol Original Article BACKGROUND AND OBJECTIVES: A free-beam-type CO(2) laser, which use a micromanipulator mounted on a microscope as the delivery system, has the merit of not being affected by hand tremor at the time of shooting. However, this delivery system has several disadvantages, including a restricted operation range and a risk of incorrect focusing. A fiber-type CO(2) laser uses a hand-held delivery system and has the opposite merits and demerits. We compared the results of stapes surgery with free-beam and fiber type delivery systems. SUBJECTS AND METHODS: The study enrolled 36 patients who underwent stapedotomy with free-beam- (n=26) or fiber- (n=10) type CO(2) lasers. The air-bone (AB) gap closure, bone conduction (BC) change, and operating time were evaluated. The AB gap closure was calculated by subtracting the preoperative BC thresholds from the postoperative air conduction thresholds. The BC change was calculated by subtracting the postoperative BC thresholds from the preoperative BC thresholds. RESULTS: The mean operating time was significantly (p=0.035) shorter in the fiber-type group (72.5±8.2 min) than in the free-beam-type group (80.5±11.4 min). The mean AB gap closure did not differ significantly (p=0.297) between the free-beamand fiber-type groups (5.8±10.1 and 1.4±6.8 dB, respectively). The mean BC change did not differ significantly (p=0.873) between the free-beam- and fiber-type groups (2.4±6.9 and 2.8±5.3 dB, respectively). The hearing outcomes did not differ significantly between the two groups. CONCLUSIONS: Operating times were significantly shorter using the fiber-type CO(2) laser, while hearing outcomes did not differ significantly between the two groups. The Korean Audiological Society 2017-07 2017-07-05 /pmc/articles/PMC5516696/ /pubmed/28704897 http://dx.doi.org/10.7874/jao.2017.21.2.103 Text en Copyright © 2017 The Korean Audiological Society and Korean Otological Society This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/).
spellingShingle Original Article
Chang, Mun Young
Choi, Hyun Seok
Lee, Sang-Youp
Koo, Ja-Won
Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title_full Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title_fullStr Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title_full_unstemmed Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title_short Comparison of Free-Beam- and Fiber-Type CO(2) Laser Delivery Systems in Stapes Surgery
title_sort comparison of free-beam- and fiber-type co(2) laser delivery systems in stapes surgery
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5516696/
https://www.ncbi.nlm.nih.gov/pubmed/28704897
http://dx.doi.org/10.7874/jao.2017.21.2.103
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