UA55335A - Laser device for transpupilary thermotherapy - Google Patents

Abstract

The laser device for the transpupilary thermotherapy comprises the power supply and control unit, the laser, the ophthalmologic microscope, and the slit illuminator. The laser, the microscope, and the illuminator share the same base. The additional lens is mounted onto the bracket at a distance from the objective lens of the ophthalmologic microscope.

Description

Description of the invention

The invention relates to medicine, namely to medical equipment, and can be used in 2 ophthalmic laser operations.

Known laser devices for transpupillary thermotherapy, which include a generator of laser radiation of different power, an optical system, a control unit and a power supply |11.

The disadvantage of these laser devices is the inconvenience of use, because to work with them, additional means are needed to visualize the fundus and to focus the laser beam on the structures of the fundus. 70 The closest analogue is a laser device for transpupillary thermotherapy, consisting of a power supply and control unit, a laser radiation generator, an ophthalmic microscope and a slit illuminator |2).

The disadvantage of the analogue is the inconvenience of application, trauma to the eye due to the need for additional equipment for visualizing the fundus and focusing the laser beam on the structures of the fundus. 12 The task of the invention is to develop such a laser device for transpupillary thermotherapy, which, due to the use of an additional lens, would provide increased ease of use and reduced trauma to the eye.

The task is solved by the fact that in a laser device for transpupillary thermotherapy, which consists of a power supply and control unit, as well as a laser radiation generator, an ophthalmic microscope and a slit illuminator installed on a common basis, while the outputs of the laser radiation generator and slit illuminator through translucent prisms are optically connected to the lens of the ophthalmic microscope, according to the invention, at a distance of 125 mm from the lens of the ophthalmic microscope, an additional lens with an optical power of 78 - 0.25 diopters is installed on the bracket, the optical axis of which coincides with the optical axis of the microscope.

Installation of an additional lens in front of the lens of the ophthalmic microscope provides visualization of the fundus and focusing of the laser beam on the structures of the fundus without the contact fundus lens being placed on the eye. This increases ease of use and reduces trauma to the eye.

Numerical data of 125 mm and 78 - 0.25 diopters were established experimentally. At the same time, it was established that going beyond these limits leads to defocusing of the system.

The essence of the invention is explained by the drawing, which shows the general view of the laser device for co-transpupillary thermotherapy (fig.). with

The laser device includes a power supply unit 1 and control 2, a laser radiation generator 3, a slit illuminator 4 and an ophthalmic microscope 5 with an eyepiece 6. IF) with an additional lens 7 with an optical power of 78 - 0.25 diopters, attached to a bracket 8 at a distance of 125 - 1 mm oiu from the lens of the ophthalmic microscope 9.

Blocks 3, 4 and 5 are installed on the same base, while the outputs of the laser radiation generator C and the slit illuminator 4 through the translucent prism of the laser radiation generator 10 and the translucent prism of the slit illuminator 11 are optically connected to the lens of the ophthalmic microscope 9, which provides " 70 directing laser radiation and light into the patient's eye and visual observation through the eyepiece 6. w-v s Work with the laser device for transpupillary thermotherapy proceeds as follows. . The laser device is plugged into the power grid, the necessary parameters for a laser intervention are set on the control unit 2. Observation of the fundus and focusing of laser radiation is performed without installing a contact fundus lens. Observation of the course of the operation is carried out through the eyepiece 6 of the ophthalmic microscope 5. Then the operation is performed as usual with transpupillary thermotherapy, that is, the laser beam is focused on the subretinal membrane, and the length of the laser pulse is 60 seconds. o In this way, the laser device combines the functions of a laser device for transpupillary thermotherapy and a contact fundus lens, which makes it possible to achieve greater convenience in work and reduce the 5p tvavmatization of the eye. o Sources of information: p 1. Pasechnikova N.V. Transpupillary thermotherapy combined with laser coagulation of feeding vessels in the treatment of choroidal neovascular membranes. Proceedings of the Russian Scientific Conference "Laser Refractive and Intraocular Surgery". -- S.--Pb.--2002.-- 6. 79. 2. Pasechnikova N.V., Teslenko A.S. Transpupillary thermotherapy of classical choroidal neovascular membranes. Collection of works and scientific articles "New laser technologies in ophthalmology". - » Kaluga. --2002.-- P. 75-- the closest analogue.

Claims (1)

The formula of the invention 60 A laser device for transpupillary thermotherapy, consisting of a power supply and control unit, as well as a laser radiation generator, an ophthalmic microscope and a slit illuminator installed on a common basis, while the outputs of the laser radiation generator and slit illuminator are optically connected to the lens through translucent prisms ophthalmic microscope, which is different 65 due to the fact that at a distance of 125 1 mm from the lens of the ophthalmic microscope, an additional lens with an optical power of 4-75 5 0.25 diopters is installed on the bracket, the optical axis of which coincides with the optical axis of the microscope. « yuyu Ge) yuyu) yuyu And - with . a 1 1 (95) se 70 sl bo b5