Purchase this article with an account.
Cyril TEMSTET, Franck FAJNKUCHEN, Valérie SARDA, Cyrine KHAMARI, Sylvia NGHIEM-BUFFET, Romain NICOLAU, Typhaine GRENET, Gilles CHAINE; PASCAL(PAttern SCAnning Laser) Photocoagulator: Evolution Of Size In Photocoagulation Scars. Invest. Ophthalmol. Vis. Sci. 2012;53(14):5819.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To assess the evolution of photocoagulation scars induced with the PASCAL photocoagulator in diabetic retinopathy.
This study included 20 successive patients. Inclusion criteria were patients with diabetic retinopathy requiring panretinal photocoagulation. For each patient, before photocoagulation, we measured: visual acuity, fundus photography, fundus autofluorescense(FAF) and fluorescein angiography. We recorded the following parameters: power, duration, size, pattern and theoretical distance between spots. We completed fundus photography and fundus autofluorescence in the nasal sector immediately after the photocoagulation session at 2 weeks, 4 weeks and 12 weeks. 6 measurements of the spacing between two spot burns were systematically recorded for each patient using Photoshop software.
Parameters used were as follows: power of 350 to 750 mW, duration: 20 ms, size: 200 micrometers, pattern: 4x4, distance between spots: 1 spot. There was no tendency for enlargement of photocoagulation scars between photography and FAF taken immediately after coagulation and those taken during the follow-up examinations.
It is customary to see a gradual expansion in size of scars with the conventional laser. A decrease in the diffusion of the thermal effect may reduce this phenomenon with a short duration PASCAL laser. We did not observe a progressive enlargement of the scars obtained with the PASCAL in the examination period of 3 months. This data and its clinical implication in the long term, to be reviewed by other studies to assess the possible need to densify panretinal photocoagulation with the PASCAL laser.
This PDF is available to Subscribers Only