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Lena Emir-Kozzi, MD
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Lena Emir-Kozzi, MD, presents a laser cataract extraction with Nd-YAG laser 1.44 um. The patient is a Caucasian 61-year-old female. Laser cataract extraction was accomplished with an Nd-YAG laser 1.44 um combined with forepump. The laser cataract surgery technology is certified by the Department of Public Health (Russia). The depth of YAG laser energy permeation into the tissues is 0.5-0.7 mm. The laser works in pulse mode with a frequency up to 25 per second. The more dense is the cataract nucleus, the more effective is the laser destruction. Laser is less effective in patients under 40 years old, but in these patients cataract removal can be performed at the expense of vacuum. This is the surgeons first experience with this device. In postoperative period the patient has minimal corneal edema and no complications in posterior eye segment.
Posted: 7/12/2012
Lena Emir-Kozzi, MD
Lena Emir-Kozzi, MD, presents a laser cataract extraction with Nd-YAG laser 1.44 um. The patient is a Caucasian 61-year-old female. Laser cataract extraction was accomplished with an Nd-YAG laser 1.44 um combined with forepump. The laser cataract surgery technology is certified by the Department of Public Health (Russia). The depth of YAG laser energy permeation into the tissues is 0.5-0.7 mm. The laser works in pulse mode with a frequency up to 25 per second. The more dense is the cataract nucleus, the more effective is the laser destruction. Laser is less effective in patients under 40 years old, but in these patients cataract removal can be performed at the expense of vacuum. This is the surgeons first experience with this device. In postoperative period the patient has minimal corneal edema and no complications in posterior eye segment.
Posted: 7/12/2012
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Fabian Ponce
10 years ago
What. Is the actual development of this type of laser??
Elena Kazimirova
13 years ago
Femto laser has a difference: one needs a contact with cornea and vacuum ring, operation is performed in two stages. Also one needs an access and the important factor is a dilated pupil. The dilated pupil is not so strongly required for our laser surgery, or we can use intraoperative devices like retractors or Malugin ring. Femto laser requires transparent medium to divide lens nucleus and our laser (Rakot) is able to divide lens of any density, including milk cataracts and overripe cataracts, dislocated lenses and diabetic cataracts. There is no contact of our laser tip with lens masses. The lens destruction leads to evolution of heat, the heat is immediately taken away with irrigation flow. The endothelium damage is equal to the damage after ultrasound phaco because of contact of the lens fragments with the endothelium and irrigation trauma. The IMPORTANT thing is following: after ultrasound phaco there is a progressive decrease of endothelial density during one year and after laser phaco there is no progressive decrease of endothelial density. Laser energy is less traumatic for the endothelium. Kopaeva VG, Sagorulko AM, Leksutkina EV, Dryagina OB, Kopaev SY, Ginoyan AA, Takhchidi HP. Laser cataract extraction. Analysis of intraoperative complications // 8th Congress of the South-East European Ophthalmological Society/ 9th Congress of the Black Sea Ophthalmological Society.- Istanbul, 2011.- P. 72 Kopaeva VG. Comparative morphometric analysis of corneal endothelium after cataract surgery using various energy (ultrasound, laser) // XXV Congress of the ESCRS. - Stockholm, 2007.- P. 77 Takhchidi HP, Kopaeva VG, Kopaev SY. Thermovisometry of working tips in energy-utilizingcataract surgery// XXV Congress of the ESCRS. - Stockholm, 2007.- P. 268-269 Kopaeva VG. Laser phaco cataract surgery// Video Atlas of Ophthalmic Surgery.- New Delhi: Jaypee Brothers, 2008 ?opayeva VG, Kravchu? OV. Optimal protective factors for corneal endothelium during cataract laser extraction using Nd: YAG laser with 1.44 ?cm wavelength// 26th ?ongress of the ESCRS: Abstracts.- Berlin, 2008. -P. 86. ?opayeva VG, Temperature effects of the working tips in energy utilizing cataract surgery// 31st World Ophthalmology ?ongress: Abstracts.- Hong - Kong, 2008. -P. A 108- Kopayeva VG, Kravchuk OV. Comparative morphometric analysis of corneal endothelium IOL and refractive surgery after cataract surgery laser: ultrasound// ASCRS Symposium on cataract IOL and refractive surgery.- San Francisco, 2009.- P. 94
Elena Kazimirova
13 years ago
Posterior capsule rupture is possible only in case of laser tip contact with the capsule. The red He-Ne guidance beam helps to avoid the contact, He-Ne beam shows the depth of laser permeation. Experiments showed it is not possible to create anterior capsulorhexis with low laser energy, low laser energy just coagulates the anterior capsule. Capsule rupture is possible with high laser energy. There is a special laser tip for porterior capsulorhexis, it helps to create a round posterior capsulorhexis. I have not tried it yet, I am going to try it when I have an occasion for it.
neeraj pandey
13 years ago
any comparision with femto and phaco energy and what is the risk on endothelium apart from other potential PCR risks. amount of heat energy produced with Nd-Yag is quite high, so there is a possibility of IOP rise POP also. could you share your experience and study reports?
Dr. Devdatta j Gohel
13 years ago
what Is a possibility of PC rent with this Laser ?