RU1819592C - Device for removal of foreign intraocular plastic objects - Google Patents

Abstract

Usage: in ophthalmology, to remove plastic foreign bodies from the human eye. SUMMARY OF THE INVENTION: in the device, the extractor is made in the form of an optical waveguide with a replaceable tip, the waveguide is coupled to a light source and a microscope, as a result of the action of light through a light guide, a foreign body is welded to the tip and then removed, control is carried out using an optical shutter. 1 ill.

Description

Yo

The present invention relates to medicine, namely to ophthalmic surgery, and is intended to remove plastic foreign bodies from the human eye.

The purpose of the invention is to facilitate the process of removing a foreign body, reducing the invasiveness of the operation and reducing its duration.

The drawing shows a block diagram of a device for implementing the method.

According to the proposed method, the tip of the waveguide 3, which is a replaceable segment of a conventional waveguide, is inserted into the sclera of the eye 1 with an embedded foreign body 2, the tip is optically matched with an ophthalmic microscope 4 and an optical emitter 5 (for example, a laser) equipped with a power source with a control capacity, 6. The coordination scheme consists

from an optical connector 7. of an optical-mechanical shutter 8, a shutter control device 9, a lens 10, and a controlled attenuator 11, by which the laser radiation power is varied.

During removal of a foreign body through the scleral incision, the tip of the waveguide 3 is inserted into the affected eye, controlling the moment of touching the surface of the foreign body visually, including through a microscope 4, which is optically aligned with the waveguide (by darkening the field of view). During the search for a foreign body, the radiation source is turned off. After touching, the optical radiation source 5 is turned on, having previously set the limit power with the help of the attenuator 11. Then, using the control device 9, synchronized with the power source 6, the optical-mechanical shutter 8 is opened, allowing precise

00

Yu

Joint venture

Yu

go

withstand an optical pulse time of 1-3 seconds. As a result of absorption of radiation, the surface of a foreign body is locally heated and melted, and the waveguide enters the volume of the foreign body. After 1 min after the radiation source is turned off, the molten zone cools down, as a result of which a waveguide is connected to a foreign body. After that, the foreign body is removed from the eye. Subsequent operations use another interchangeable tip.

Lasers (argon), incandescent lamps, gas discharge lamps are used as radiation sources. The power of the sources is 1-10 watts. Quartz or glass fibers with a diameter of 0.3-1.0 mm are used as waveguides.

Using the proposed method in surgical practice allows to reduce the invasiveness of the operation (by making smaller incisions to insert a thin waveguide inside the eye and reducing the heating of the surrounding eye tissue), to reduce the duration of the operation due to faster melting of the contact area of the foreign body with the extractor and to facilitate the search , a fragment due to the use of an ophthalmic microscope aligned with the waveguide.

PRI me R. B-M, a / c 11243/89, 45 years was in the Moscow Research Institute of GB them. Helmgirlitz from 02.13.89 g to 02.20.89 g with a diagnosis of OS - a consequence of a penetrating wound, traumatic cataract, intraocular foreign body. Injury at home from the explosion of a plastic flask. Upon receipt, vision OD 1.0, OS - 0.02 n / a. OD is healthy. The OS is calm. The cornea is transparent. The anterior chamber is of medium depth, the moisture is clean. The lens with pronounced opacities in

cortical layers x. The fundus is not ophthalmoscopically. X-ray in the OS is determined by a low-contrast shadow of a foreign body measuring 2.0 x 2.0 x 1.0

mm, which is located between the meridians 4 h 40 m - 5 h 00 m, 12-14 mm from the plane of the limb, and g 8-9 mm from the anatomical axis.

Foreign body located in the left

the eye is intrathecal. 02/19/89 g operation OS - diescleral removal of a foreign body.

Under the m / a, the conjunctiva was cut 13 mm from the limb along the meridian of 5 hours.

A foreign body is localized using ultrasound and diaphanoscopy. A scleral incision was made over the foreign body. The extractor tip is introduced into the section and brought into contact with a foreign

body, the optical radiation source is turned on for 3 seconds. 1 min after cooling of the molten region, the foreign body was removed from the eye. Nodal sutures on the sclera. Suture on the conjunctiva.

At discharge, the visual acuity of the OS is 0.02. Os t is calm. The cornea is transparent. Turbidity in the cortical layers of the lens. The fundus is not ophthalmoscopic,

Formula of the invention

A device for removing plastic intraocular foreign bodies containing an extractor, characterized in that, in order to reduce the morbidity and

the duration of operations, the extractor is made in the form of an optical waveguide with a replaceable tip, and the input end of the optical waveguide is interfaced with a light source and a microscope and

It has an optical controlled shutter.

/

7 J