Micropulse and continuous wave diode retinal photocoagulation: visible and subvisible lesion parameters

The British Journal of Ophthalmology
T J DesmettreM A Mainster

Abstract

Subvisible micropulse diode laser photocoagulation localises retinal laser damage because brief micropulses allow little time for heat conduction to spread temperature rise from the retinal pigment epithelium to the neural retina. Treatment power is often chosen as a multiple of that needed for visible continuous wave lesions. The authors measured clinical laser powers needed for visible end point micropulse and continuous wave diode laser retinal photocoagulation. Six parallel rows of 10 diode laser (810 nm) burns were made in the superior peripheral retina of six consecutive patients undergoing their initial frequency doubled Nd:YAG (532 nm) panretinal photocoagulation for proliferative or severe non-proliferative diabetic retinopathy. All photocoagulation exposures were 125 microm in retinal diameter and 0.2 seconds in duration. Micropulse exposures were performed with 500 Hz, 0.3 ms micropulses. The minimal power needed (1) for visible continuous wave diode photocoagulation was determined from two adjacent rows of laser lesions and (2) for visible micropulse diode photocoagulation from four additional adjacent rows of laser lesions. Fluorescein angiograms and red-free fundus photographs were obtained immediately and 6 days ...Continue Reading

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Citations

Oct 12, 2012·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Ahmad MirshahiMohamad Mehdi Zaferani
Sep 1, 2006·Photomedicine and Laser Surgery
Feb 27, 2013·Oman Journal of Ophthalmology·Sanjiv K GuptaParitosh Pandey
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Mar 10, 2016·Seminars in Ophthalmology·Hilary S Brader, Lucy H Y Young
May 9, 2014·Clinical & Experimental Ophthalmology·Maria Cecilia D AquinoPaul Tk Chew
Jul 7, 2018·Journal of Glaucoma·Aleksandr YelenskiyRamesh S Ayyala
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May 14, 2020·Journal of Glaucoma·Facundo G SanchezTomas M Grippo
Sep 17, 2020·Seminars in Ophthalmology·Nandita AnandDavid Solá-Del Valle
Nov 30, 2016·Current Opinion in Ophthalmology·Behzad AmoozgarYing Han
May 22, 2020·Lasers in Medical Science·Maciej Gawęcki
Oct 30, 2020·Journal of Clinical Medicine·Maciej GawęckiAndrzej Grzybowski
Feb 13, 2021·Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie·Michael MarchandYounes Agoumi
Jul 29, 2021·Translational Vision Science & Technology·Jackie TanStephanie Louise Watson

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