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Q-Switched Neodymium-YAG Laser Angle Surgery in Open-angle Glaucoma

Q-Switched Neodymium-YAG Laser Angle Surgery in Open-angle Glaucoma Abstract • In a short-term pilot study, we evaluated Q-switched neodymium-YAG laser angle surgery in 25 eyes from 22 patients with medically uncontrolled open-angle glaucoma. All eyes had unacceptable intraocular pressures (IOPs), despite maximum tolerated medical therapy, argon laser trabeculoplasty, and prior intraocular filtration surgery (eight eyes). Using a pulse energy of 10 millijoules, ten spots were placed approximately 4° apart in the mid-trabecular meshwork using an Nd-YAG laser (Coherent 9900). The mean preoperative and final postoperative IOPs were 30 ± 6 mm Hg and 21 ± 8 mm Hg, respectively. The mean follow-up time was five (±3) months (range, two to 14 months). The final postoperative IOP was less than 22 mm Hg in 17 eyes (68%). Holes within the trabecular meshwork were visible in 14 eyes, and laser therapy was associated with the liberation of debris into the anterior chamber in all eyes. Complications included transient postoperative IOP elevation (eight eyes), angle bleeding (six eyes), and posterior displacement of the iris root (four eyes). References 1. Wickham MG, Worthen DM: Argon laser trabeculectomy: Long-term follow-up . Ophthalmology 1979;86:495-503.Crossref 2. Wise JB, Witter SL: Argon laser therapy for open-angle glaucoma: A pilot study . Arch Ophthalmol 1979;97:319-322.Crossref 3. Safran MJ, Robin AL, Pollack IP: Argon laser trabeculoplasty in younger patients with primary open-angle glaucoma . Am J Ophthalmol 1984;97:292-295. 4. Spaeth GL, Fellman RL, Starita RJ, et al: Argon laser trabeculoplasty in the treatment of secondary glaucoma . Trans Am Ophthalmol Soc 1983;81:325-332. 5. Thomas JV, Simmons RJ, Belcher CD III: Argon laser trabeculoplasty in the presurgical glaucoma patient . Ophthalmology 1982;89:187-197.Crossref 6. Robin AL, Pollack IP: Argon laser trabeculoplasty in secondary forms of open-angle glaucoma . Arch Ophthalmol 1983;101:382-384.Crossref 7. Schwartz AL, Kopelman J: Four-year experience with argon laser trabecular surgery in uncontrolled open-angle glaucoma . Ophthalmology 1983;90:771-780.Crossref 8. Bonney CH, Gaasterland DE, Rodrigues MM, et al: Short-term effects of Q-switched ruby laser on monkey anterior chamber angle . Invest Ophthalmol Vis Sci 1982;22:310-318. 9. Gaasterland DE, Bonney CH: Long-term effects of Q-switched laser on monkey anterior chamber angle . Invest Ophthalmol Vis Sci 1985;26:129-135. 10. Krasnov MM: Laser puncture of the anterior chamber angle in glaucoma . Am J Ophthalmol 1973;75:674-678. 11. Melamed S, Pei J, Puliafito CA, et al: Q-switched neodymium-YAG laser trabeculopuncture in monkeys . Arch Ophthalmol 1985; 103:129-133.Crossref 12. Robin AL, Pollack IP: The Q-switched ruby laser in glaucoma . Ophthalmology 1984;91:366-371.Crossref 13. Van der Zypen E, Bebie H, Fankhauser F: Morphological studies about the efficiency of laser beams upon the structures of the angle of the anterior chamber . Int Ophthalmol 1979;1:109-122.Crossref 14. Weinreb RN, Ruderman J, Juster R, et al: Immediate intraocular pressure response to argon laser trabeculoplasty . Am J Ophthalmol 1983;95:279-286. 15. Hotchkiss ML, Robin AL, Pollack IP, et al: Non-steroidal anti-inflammatory agents after argon laser trabeculoplasty . Ophthalmology 1984; 91:969-976.Crossref 16. Krupin T, Kolker AE, Kass MA, et al: Intraocular pressure the day of argon laser trabeculoplasty in primary open-angle glaucoma . Ophthalmology 1984;91:361-365.Crossref 17. Robin AL, Pollack IP: A comparison of neodymium . Ophthalmology 1984;91:1011-1016.Crossref 18. Terry AC, Stark WJ, Maumenee AE, et al: Neodymium-YAG laser for posterior capsulotomy . Am J Ophthalmol 1983;96:716-720. 19. Channell MM, Beckman H: Intraocular pressure changes after neodymium-YAG laser posterior capsulotomy . Arch Ophthalmol 1984; 102:1024-1026.Crossref 20. Flohr MJ, Robin AL, Kelley JS: Early complications following Q-switched neodymium:YAG laser posterior capsulotomy . Ophthalmology 1985;92:360-363.Crossref http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Ophthalmology American Medical Association

Q-Switched Neodymium-YAG Laser Angle Surgery in Open-angle Glaucoma

Robin, Alan L.; Pollack, Irvin P.
Archives of Ophthalmology , Volume 103 (6) – Jun 1, 1985
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References (22)

Publisher
American Medical Association
Copyright
Copyright © 1985 American Medical Association. All Rights Reserved.
ISSN
0003-9950
eISSN
1538-3687
DOI
10.1001/archopht.1985.01050060053023
Publisher site
See Article on Publisher Site

Abstract

Abstract • In a short-term pilot study, we evaluated Q-switched neodymium-YAG laser angle surgery in 25 eyes from 22 patients with medically uncontrolled open-angle glaucoma. All eyes had unacceptable intraocular pressures (IOPs), despite maximum tolerated medical therapy, argon laser trabeculoplasty, and prior intraocular filtration surgery (eight eyes). Using a pulse energy of 10 millijoules, ten spots were placed approximately 4° apart in the mid-trabecular meshwork using an Nd-YAG laser (Coherent 9900). The mean preoperative and final postoperative IOPs were 30 ± 6 mm Hg and 21 ± 8 mm Hg, respectively. The mean follow-up time was five (±3) months (range, two to 14 months). The final postoperative IOP was less than 22 mm Hg in 17 eyes (68%). Holes within the trabecular meshwork were visible in 14 eyes, and laser therapy was associated with the liberation of debris into the anterior chamber in all eyes. Complications included transient postoperative IOP elevation (eight eyes), angle bleeding (six eyes), and posterior displacement of the iris root (four eyes). References 1. Wickham MG, Worthen DM: Argon laser trabeculectomy: Long-term follow-up . Ophthalmology 1979;86:495-503.Crossref 2. Wise JB, Witter SL: Argon laser therapy for open-angle glaucoma: A pilot study . Arch Ophthalmol 1979;97:319-322.Crossref 3. Safran MJ, Robin AL, Pollack IP: Argon laser trabeculoplasty in younger patients with primary open-angle glaucoma . Am J Ophthalmol 1984;97:292-295. 4. Spaeth GL, Fellman RL, Starita RJ, et al: Argon laser trabeculoplasty in the treatment of secondary glaucoma . Trans Am Ophthalmol Soc 1983;81:325-332. 5. Thomas JV, Simmons RJ, Belcher CD III: Argon laser trabeculoplasty in the presurgical glaucoma patient . Ophthalmology 1982;89:187-197.Crossref 6. Robin AL, Pollack IP: Argon laser trabeculoplasty in secondary forms of open-angle glaucoma . Arch Ophthalmol 1983;101:382-384.Crossref 7. Schwartz AL, Kopelman J: Four-year experience with argon laser trabecular surgery in uncontrolled open-angle glaucoma . Ophthalmology 1983;90:771-780.Crossref 8. Bonney CH, Gaasterland DE, Rodrigues MM, et al: Short-term effects of Q-switched ruby laser on monkey anterior chamber angle . Invest Ophthalmol Vis Sci 1982;22:310-318. 9. Gaasterland DE, Bonney CH: Long-term effects of Q-switched laser on monkey anterior chamber angle . Invest Ophthalmol Vis Sci 1985;26:129-135. 10. Krasnov MM: Laser puncture of the anterior chamber angle in glaucoma . Am J Ophthalmol 1973;75:674-678. 11. Melamed S, Pei J, Puliafito CA, et al: Q-switched neodymium-YAG laser trabeculopuncture in monkeys . Arch Ophthalmol 1985; 103:129-133.Crossref 12. Robin AL, Pollack IP: The Q-switched ruby laser in glaucoma . Ophthalmology 1984;91:366-371.Crossref 13. Van der Zypen E, Bebie H, Fankhauser F: Morphological studies about the efficiency of laser beams upon the structures of the angle of the anterior chamber . Int Ophthalmol 1979;1:109-122.Crossref 14. Weinreb RN, Ruderman J, Juster R, et al: Immediate intraocular pressure response to argon laser trabeculoplasty . Am J Ophthalmol 1983;95:279-286. 15. Hotchkiss ML, Robin AL, Pollack IP, et al: Non-steroidal anti-inflammatory agents after argon laser trabeculoplasty . Ophthalmology 1984; 91:969-976.Crossref 16. Krupin T, Kolker AE, Kass MA, et al: Intraocular pressure the day of argon laser trabeculoplasty in primary open-angle glaucoma . Ophthalmology 1984;91:361-365.Crossref 17. Robin AL, Pollack IP: A comparison of neodymium . Ophthalmology 1984;91:1011-1016.Crossref 18. Terry AC, Stark WJ, Maumenee AE, et al: Neodymium-YAG laser for posterior capsulotomy . Am J Ophthalmol 1983;96:716-720. 19. Channell MM, Beckman H: Intraocular pressure changes after neodymium-YAG laser posterior capsulotomy . Arch Ophthalmol 1984; 102:1024-1026.Crossref 20. Flohr MJ, Robin AL, Kelley JS: Early complications following Q-switched neodymium:YAG laser posterior capsulotomy . Ophthalmology 1985;92:360-363.Crossref

Journal

Archives of Ophthalmology – American Medical Association

Published: Jun 1, 1985

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