Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation

Jonathan Cheuk-hung Chan, Shing Chuen Chow, Jimmy Shiu-ming Lai Department of Ophthalmology, University of Hong Kong, Hong KongCorrespondence: Jonathan Cheuk-hung ChanDepartment of Ophthalmology, LKS Faculty of Medicine, University of Hong Kong, Room 301, Block B, Cyberport 4, Hong KongTel +852 3962...

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Autores principales:	Chan JC, Chow SC, Lai JS
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2020
Materias:	cyclodiode cycloablation cyclodestruction cyclodestructive g-probe Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/ce55542ef7804762b92b4f8221466d86
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spelling	oai:doaj.org-article:ce55542ef7804762b92b4f8221466d862021-12-02T05:28:43ZEffectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation1177-5483https://doaj.org/article/ce55542ef7804762b92b4f8221466d862020-01-01T00:00:00Zhttps://www.dovepress.com/effectiveness-and-safety-of-long-duration-versus-short-duration-diode--peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Jonathan Cheuk-hung Chan, Shing Chuen Chow, Jimmy Shiu-ming Lai Department of Ophthalmology, University of Hong Kong, Hong KongCorrespondence: Jonathan Cheuk-hung ChanDepartment of Ophthalmology, LKS Faculty of Medicine, University of Hong Kong, Room 301, Block B, Cyberport 4, Hong KongTel +852 3962 1405Email jonnochan@yahoo.comPurpose: To compare the efficacy and safety of diode laser transscleral cyclophotocoagulation using either the long duration or short duration protocol.Methods: Retrospective series of 23 consecutive patients with glaucoma who underwent continuous-wave diode laser transscleral cyclophotocoagulation from August 2016 to July 2018 at a tertiary hospital in Hong Kong. Laser pulse duration for the long and short duration protocols was defined as 3.0– 4.0 and 1.5– 2.0 s, respectively.Results: There were 15 male and 8 female Chinese subjects (23 eyes), age 49– 90 (71.3 ± 2.7), with 10 subjects that underwent long duration cyclophotocoagulation (power 1239.2 ± 78.3 mW, spots 13.9 ± 1.4) and 13 subjects that had short duration cyclophotocoagulation (mean power 1817.3 ± 85.7 mW, spots 14.4 ± 1.0). Six months after long and short duration cyclophotocoagulation, intraocular pressure decreased significantly from 29.9 ± 7.8 to 21.1 ± 6.5 (p < 0.01), and from 35.4 ± 2.7 to 24.1 ± 3.4 (p = 0.04), respectively, while glaucoma medications decreased significantly by 1.4 ± 0.5 (p = 0.02) in the long duration group only. Reduction of medications after short duration cyclophotocoagulation was less and did not reach statistical significance (0.9 ± 0.9, p = 0.15). There was no significant difference of visual deterioration and complication rates.Conclusion: Both types of cyclophotocoagulation were equally effective in lowering intraocular pressure by 6 months, but the short duration protocol, using higher laser power, was able to achieve a greater and earlier reduction, at 3 months. However, the long duration protocol, using less laser power, appears better at reducing medication requirement by 6 months.Keywords: cyclodiode, cycloablation, cyclodestruction, cyclodestructive, g-probeChan JCChow SCLai JSDove Medical Pressarticlecyclodiodecycloablationcyclodestructioncyclodestructiveg-probeOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 197-204 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	cyclodiode cycloablation cyclodestruction cyclodestructive g-probe Ophthalmology RE1-994
spellingShingle	cyclodiode cycloablation cyclodestruction cyclodestructive g-probe Ophthalmology RE1-994 Chan JC Chow SC Lai JS Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
description	Jonathan Cheuk-hung Chan, Shing Chuen Chow, Jimmy Shiu-ming Lai Department of Ophthalmology, University of Hong Kong, Hong KongCorrespondence: Jonathan Cheuk-hung ChanDepartment of Ophthalmology, LKS Faculty of Medicine, University of Hong Kong, Room 301, Block B, Cyberport 4, Hong KongTel +852 3962 1405Email jonnochan@yahoo.comPurpose: To compare the efficacy and safety of diode laser transscleral cyclophotocoagulation using either the long duration or short duration protocol.Methods: Retrospective series of 23 consecutive patients with glaucoma who underwent continuous-wave diode laser transscleral cyclophotocoagulation from August 2016 to July 2018 at a tertiary hospital in Hong Kong. Laser pulse duration for the long and short duration protocols was defined as 3.0– 4.0 and 1.5– 2.0 s, respectively.Results: There were 15 male and 8 female Chinese subjects (23 eyes), age 49– 90 (71.3 ± 2.7), with 10 subjects that underwent long duration cyclophotocoagulation (power 1239.2 ± 78.3 mW, spots 13.9 ± 1.4) and 13 subjects that had short duration cyclophotocoagulation (mean power 1817.3 ± 85.7 mW, spots 14.4 ± 1.0). Six months after long and short duration cyclophotocoagulation, intraocular pressure decreased significantly from 29.9 ± 7.8 to 21.1 ± 6.5 (p < 0.01), and from 35.4 ± 2.7 to 24.1 ± 3.4 (p = 0.04), respectively, while glaucoma medications decreased significantly by 1.4 ± 0.5 (p = 0.02) in the long duration group only. Reduction of medications after short duration cyclophotocoagulation was less and did not reach statistical significance (0.9 ± 0.9, p = 0.15). There was no significant difference of visual deterioration and complication rates.Conclusion: Both types of cyclophotocoagulation were equally effective in lowering intraocular pressure by 6 months, but the short duration protocol, using higher laser power, was able to achieve a greater and earlier reduction, at 3 months. However, the long duration protocol, using less laser power, appears better at reducing medication requirement by 6 months.Keywords: cyclodiode, cycloablation, cyclodestruction, cyclodestructive, g-probe
format	article
author	Chan JC Chow SC Lai JS
author_facet	Chan JC Chow SC Lai JS
author_sort	Chan JC
title	Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
title_short	Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
title_full	Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
title_fullStr	Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
title_full_unstemmed	Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation
title_sort	effectiveness and safety of long duration versus short duration diode laser transscleral cyclophotocoagulation
publisher	Dove Medical Press
publishDate	2020
url	https://doaj.org/article/ce55542ef7804762b92b4f8221466d86
work_keys_str_mv	AT chanjc effectivenessandsafetyoflongdurationversusshortdurationdiodelasertransscleralcyclophotocoagulation AT chowsc effectivenessandsafetyoflongdurationversusshortdurationdiodelasertransscleralcyclophotocoagulation AT laijs effectivenessandsafetyoflongdurationversusshortdurationdiodelasertransscleralcyclophotocoagulation
_version_	1718400377877954560

Effectiveness and Safety of Long Duration versus Short Duration Diode Laser Transscleral Cyclophotocoagulation

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