METHOD FOR INTRAOPERATIVE INDUCTION OF POSTERIOR VITREOUS DETACHMENT IN THE SURGICAL TREATMENT OF VITREORETINAL PATHOLOGY Russian patent published in 2022 - IPC A61F9/07 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to ophthalmology. Perforation is performed in the posterior hyaloid membrane (PLM), while the tip of the vitreotome is brought to the surface of the retina in the upper quadrant of the optic disc (OD) parapapillary at a distance of 0.5 mm from the edge of the optic disc. The distance from the edge of the instrument to the surface of the retina is 0.5 mm, and the window of the vitreotome is placed parallel to the surface of the fundus and directed in the direction opposite to the center of the OD and up along the vertical axis in the direction of 12 o'clock. Then create a maximum vacuum of 650 mm Hg. Art. for suction of vitreous body (VB) fibers into the vitreotome window until a fold of the PLM appears concentrically on the optic disc, illustrating a local posterior vitreous detachment (PVD) parapapillary. Then the mode is switched from “vacuum” to the “cuts” mode with a frequency of 5000 cuts and a maximum vacuum of 650 mm Hg. Art. and local vitrectomy with capture and perforation of the PLM is performed, leaving the vitreous motionless for 2-3 seconds. Vitreotome placement, creation of the PLM fold, local vitrectomy and PLM perforation are performed in the same way in the parapapillary zones corresponding to the lower and nasal quadrants of the OD. Further, in the "vacuum" mode, movements from the optic disc to the periphery by the aspiration method pull up the cortical layers of the VB and produce the detachment of the VB from the edge of the OD and the separation of the VB from the surface of the retina from the center to the periphery.

EFFECT: method allows to intraoperatively separate the posterior cortical layers of the vitreous body from the retina, to ensure a high functional and anatomical result of surgical treatment of various diseases of the retina, optic nerve and vitreous body in the shortest possible time period with minimal risks of damage to the fundus structures and without the use of dyes.

1 cl, 1 ex