METHOD FOR PREVENTIVE INTRASCLERAL FLANGE MONOFIXATION OF AN INTRAOCULAR LENS Russian patent published in 2024 - IPC A61F9/07 A61F2/16 A61K31/167 A61K31/137 A61P27/02 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to ophthalmosurgery. Cataract phacoemulsification, intraocular lens and intracapsular ring implantation are performed. Before implantation of the intraocular lens, it is pre-pierced with a microsurgical stabbing needle with polypropylene suture 8-0, orienting the prick from the bottom up, and the left free rear end of the suture at distance of 30 mm from the prick is coagulated by means of a thermocauter to form a rear fixing flange. Implantation of the pierced intraocular lens into the capsular sac through the cartridge is carried out together with portion of 8-0 polypropylene suture remaining after the needle is cut off, by orienting it posteriorly from the intraocular lens when using the injector with a flat metal pusher and anteriorly when using the injector with a round silicone pusher. After lens implantation, the intraocular portion of polypropylene suture 8-0 is captured and brought out through the corneocentesis with the formation of an extraocular loop, and its free front end is oriented intraocularly towards the intended place of suturing. A solution containing 1.0 % lidocaine and 0.5 % phenylephrine, as well as a cohesive viscoelastic is introduced intraocularly into the posterior chamber in the area of the intended attachment point. Using a curved injection needle with diameter of 32 gages, a primary scleral puncture is performed 2.5 mm from the limb so that the intraocular injection needle is above the capsular sac in the posterior chamber of the eye, removal of the free front end of 8-0 polypropylene suture from the eye is carried out by inserting it at angle of 130° into a lumen of an injection needle with diameter of 32 gages and removing it from the eye. Intrascleral fixation of the extraocular part of the free front end of polypropylene suture 8-0 is carried out using a bent injection needle with diameter of 32 gages, with polypropylene suture 8-0 inserted into its lumen, by its intrascleral delivery from the primary scleral puncture site to a pre-formed corneal-scleral pocket made using a microsurgical keratoma knife with width of 2.2 mm, removing the free front end of polypropylene suture 8-0 from this pocket and forming a front fixing flange by means of a thermal snapper, which is immersed back into the corneal-scleral pocket.

EFFECT: method enables to minimize the number of surgical interventions, increase the safety of cataract phacoemulsification, provides prevention of postoperative decentration of complex "capsular sac + intraocular lens" in conditions of ligamentous apparatus weakness or subluxation of crystalline lens when performing cataract phacoemulsification.

1 cl, 2 ex, 19 dwg