Clinical Study
Eye (2007) 21, 962–967; doi:10.1038/sj.eye.6702362; published online 19 May 2006
Laser-induced chorioretinal venous anastomosis using combined lasers with different wavelengths
Ethic approval: Beijing Committee Review Board approval was obtained at the beginning of the study. The location of the Committee Review Board is Beijing Health Bureau
Competing interest statement: There are no proprietary or commercial interests
Previous presentation: This study was partly presented in the First Seri-ARVO meeting on research in vision and ophthalmology in Singapore in 2003, hosted by Singapore Eye Research Institute and ARVO
N Lu1, N L Wang1, Z H Li1, G L Wang1, F Zhang1 and X Y Peng1
1Ophthalmology Center of Beijing Tong-Ren Hospital, Capital Medical University, Beijing, China
Correspondence: NL Wang, Ophthalmology Center of Beijing Tong-Ren Hospital, Capital Medical University, Dong Jiao Min Xiang No.1, Beijing 100730, China. Tel: +86 10 58268251; Fax: +86 0 65131244; E-mails: plf@public3.bta.net.cn and luningnl@yahoo.com.cn
Received 20 September 2005; Revised 12 December 2005; Accepted 21 March 2006; Published online 19 May 2006.
Abstract
Aim
To evaluate the effectiveness of combined lasers with different wavelengths in creating chorioretinal venous anastomosis (CRVA) in nonischaemic central retinal vein occlusion (CRVO).
Methods
In this retrospective, noncomparative, consecutive case series, records of all patients with a diagnosis of nonischaemic CRVO who underwent combined laser treatment to induce CRVA and who were followed-up for 6 months or longer were reviewed.
Results
Records of 85 patients (85 eyes) were analysed. These patients were divided into two groups. In group 1 (24 cases, 24 eyes), combined lasers with two different wavelengths (argon blue–green laser combined with Nd–YAG laser were used. In group 2 (61 cases, 61 eyes), combined lasers with three different wavelengths (argon blue–green laser combined with krypton red laser and Nd–YAG laser) were used. Functional anastomosis formed in 13 out of 24 eyes (54%) in group 1 and 47 out of 61 eyes (77%) in group 2. In patients with successful anastomosis, visual acuity improved for two or more lines in 49 out of 60 eyes (82%), with the remaining eyes undergoing no change. There were no serious complications.
Conclusion
The use of three laser wavelengths results in the creation of laser anastomosis and the success rate may be higher than when using two wavelengths alone.
Keywords:
chorioretinal venous anastomosis (CRVA), nonischaemic central retinal vein occlusion (CRVO), argon laser, krypton red laser, Nd–YAG laser
