SU1454457A1 - Arrangement for ophthalmologic operations - Google Patents

Abstract

This invention relates to medical instruments for the surgical treatment of eyes. The purpose of the invention is to increase reliability and reduce the morbidity of operations, increase the cutting tool durability. The tool contains an outer tube 1 with a trapezoidal hole 2. In tube I is concentrically dispersed. The inner tube 5 is rotatably rotated with an oblique end with side pointed cutting edges 7. Hole 2 has side pointed cutting edges 9. Cutting edges the tubes 5 are bent in such a way that a "bead" is created according to the type of scissors blades. The cutting edges of the tube 5 are in point contact with the corresponding edges of the opening 2. When the device is operated, a vacuum is created in the inner cavity 14 of the inner tube 5, under the action of which the fabric 15 is tightened and cut off by pairs of cutting edges and then transported through the cavity to the collection . 9 il. Q iS

Description

Fig.Ch

The invention relates to medical technology, namely to instruments for the purpose of treating eyes.

The aim of the invention is to increase the reliability and reduce the morbidity of operations, as well as increase the cutting resistance of the tool.

; FIG. 1 shows the tip of the device, a general view; in fig. 2 - view A of FIG. one

scan); in fig. 3 - section BB on (| zig. 2; in Fig. 4 - section B-B in Fig. I,

a) working move; in fig. 5 - the same, working penetration; in fig. 6 is a cross-section of the FIG. 3; FIG. 7 - end direction section 1 of the inner tube; in fig. 8 is a three-dimensional image of the end portion of the tip; in fig. 9 is that in FIG. 4, at the time of the cut.

The device contains an outer tube 1: a trapezoidal shape opening 2 with a length / located in the end part 3 of the cockpit 1, which is fixedly mounted on the housing 4. The outer tube 1 is concentrically positioned with the possibility of reciprocating movement of the inner tube 5 with a cut-off end with (yukovy sharpened edges 6 and 7. The side edges 8 and 9 of the trapezoidal hole 2 are pointed and removed by cutting, and the end base 10 of the hole 2 is bent outward by an amount C relative to the inner cylindrical The outer surface of the outer tube 1. The opposite base II and the lateral cutting edges 8 and 9 of the hole 2 are located in the frids of the cylindrical surfaces of the outer tube 1. The cutting edges 6 and 7 of the inner tube in the direction along the horizon are || 1st The axes of the tubes 1 and 5 are bent by a magnitude of C2 (Fig. 4 and 5), which increases in the direction of the end part 12 of the 1KI 5 pipe, thus forming a “bead by type. Scissors blades. The value of Cr in cross section along the "base 10 of the hole 2 reaches the value Ci, which ensures a constant contact of the end part 12 of the tube 5 with the end Part 3 of the tube 1. Cutting edges 6 and 7 1 are in point contact at points O, respectively, with cutting edges 8 and 9 of the outer tube, forming the angles of the solution f with them in the cutting plane (Fig. 2), and in planes perpendicular to them parallel to the longitudinal axis, the angles of the twist 1J (Fig. 3), in the normal plane, the blades containing the cutting edges 6 and 7 have rear corners 7 (Fig. 6). When grinding an obliquely cut end of the tube 5, an inner chamfer 13 is formed (Fig. 7).

The device works as follows.

The working tip (FIG. 8) is inserted

through the hole in the sclera into the ocular cavity

the block, the end portion of the tip with a hole is supplied to the excised diseased tissue. Then, a vacuum suction and a drive (not shown) of the inner 5 tube 5, which begins to perform a reciprocating rotation, are simultaneously turned on. The amplitude of the movement of the tube 5 is such that during forward and reverse movements of the point O of the contact, a pair of cutting edges 6-8 and 7-9 are sequentially moved from the base

 10 to the base 1G of the opening 2 of the outer tube 1. The operation of the device is based on the sequential tightening under the action of a vacuum created by vacuum suction into the internal cavity 14 of the tube 5

5 of the fabric 15, its cutting off by pairs of cutting edges 6-8 and 7-9 and transportation through the cavity 14 to the collection (not shown). In the phase of movement of the tube 5, at which a cut-off of the tissue is sucked into the lumen 16 of the hole 2 formed by the cutting

0 by edges 6-8 and base 10 of aperture 2, cutting edges 6-8 (FIGS. 2 and 5), at the same time in an increasing in size opening 17 of aperture 2 formed by cutting edges 7 and 9 and a base 10

5 holes 2, a new batch of fabric 15 is drawn in. After the fabric 15 has completely cut off, the hole 2 that has entered the lumen 16 is reached by moving the point O of contact of the cutting edges 6 and 8 along the cutting edge 8 to the base 10 (the light 16 disappears completely ), the cut-off piece of fabric 15 under the action of suction is moved in the direction of the collector (Fig. 1). Then the tube 5 is moved in the opposite direction, with the cutting edges 7 and 9 cutting off the fabric 15 (Fig. 4),

5 tucked into the lumen 17 of the aperture 2, at the same time, the next tissue fragment 15 expands in the lumen 16 of the aperture 2 in size. After the lumen 17 is completely closed, the tissue 15 cut out by the cutting edges 7 and 9 is sucked into the collection. Further, the tube 5 moves in the opposite direction, and the cutting of the fabric 15 with the cutting edges 6 begins and the cycle of operation repeats. The amount of tissue, zag zagivaemoy

5 into the increasing lumen of the opening 2 is limited by a fragment of the excised tissue in the cavity 14, which is sucked into the cavity 14 of the tube 5 through the other lumen of the opening 2. After removing the cut-off tissue fragment 15h0, cut the fully open lumen of the opening 2 into the vacant cavity 14, the next piece of fabric is drawn in at a high speed; a stress state is formed in the tissue 15, which improves the cutting conditions of the fabric

5 by creating an additional counter-backing (known cutting effect: the tensioned fibers of the fabric are cut at lower cutting forces).

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A device for ophthalmic operations, consisting of a drive, a vacuum system and a working tip, made in the form of two concentrically arranged tubes with cutting elements in the end portions, the cutting element of the outer tube being made in the form of an aperture with cutting edges, characterized by that, in order to increase reliability and reduce the morbidity of operations, to increase the tool life, the hole of the outer tube is made of trapezoidal shape with a wide base in the end part and cutting side edges and the cutting element of the inner tube is made in the form of a cut-off leading edge, the side pointed parts of which are bent, while the ends of the pointed parts of the inner tube are arranged to be blocked wide base of the outer tube opening Budf ( 2 .fi-B FIG. B 5 Aa 5 Mr-dh FIG. FIG L 7 BUT / Phie.E