S.Ya. ROMANENKO, A.V. TERESHCHENKO, I.G. TRIFANENKOVA, V.B. GRECHANINOV, S.K. DEMYANCHENKO

The Kaluga Branch of the S. Fyodorov Eye Microsurgery Federal State Institution, 5 Svyatoslav Fedorov Str., Kaluga, Russian Federation, 248007

 Romanenko S.Ya. ― Cand. Med. Sc., Deputy Director for Clinical Work, tel. (4842) 50-57-67, e-mail: nauka@mntk.kaluga.ru

Tereshchenko A.V. ― D. Med. Sc., Director, tel. (4842) 50-57-67, e-mail: nauka@mntk.kaluga.ru

Trifanenkova I.G. ― Cand. Med. Sc., Deputy Director for Research, tel. (4842) 50-57-67, e-mail: nauka@mntk.kaluga.ru

Grechaninov V.B. ― ophthalmologist of the Cataract Surgery Department, tel. (4842) 50-57-67, e-mail: nauka@mntk.kaluga.ru

Demyanchenko S.K. ― Cand. Med. Sc., Head of the Department of Optical-reconstructive and Refractive Surgery, tel. (4842) 50-57-67, e-mail: nauka@mntk.kaluga.ru

The optimal and energy-safe parameters of femtosecond laser radiation on the Ziemer FEMTO LDV Z6 device were determined at the stage of lens cataract destruction at various degrees of the nucleus density. The research was conducted on 37 patients (37 eyes). 4 groups of patients were formed given the initial density of the core lens according to the classification by L. Buratto (1999) and the optical density of the lens nucleus classification by Boiko K.V. (2013), corresponding to the degrees of cataract density. All patients underwent phacoemulsification of cataract with femtolaser support. For fragmentation of the lens nucleus in group 1, 110% energy (arbitrary units) of femtolaser was used, in group 2 ― 120%. In groups 3 and 4, the combination of previous transcorneal anticapsular of YAG-laser phacofragmentation of cataract lens nucleus with subsequent laser exposure with 130% energy was used for full fragmentation of the dense core of the lens. In groups 1 and 2 fragmentation of the lens nucleus 1 type was received, in groups 3 and 4 ― type 1 and 2. The use of the selected parameters of femtosecond laser radiation contributed to a minimal formation of «gas vacuoles». The high-quality and complete laser destruction of the lens cataract allowed the use of minimal amount of ultrasound energy and irrigation fluid during a phacoemulsification execution. The phacofragmentation with femtosecond laser Femto LDV Z6 device in the range of 110-120% laser energy for has no adverse effects on the corneal endothelium and enables to completely fragment the lens.

Key words: cataract surgery, femtosecond laser-assisted surgery, density of the lens nucleus.

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