RU31105U1 - Device for fragmentation of the nucleus of the natural lens of the eye - Google Patents

Description

Description of the utility model A device for fragmentation of the nucleus of the natural lens of the eye

The utility model relates to the field of ophthalmic surgery.

A device is known that is used for fragmentation of the nucleus of the natural lens of the eye (“Device for fragmentation of the nucleus of the lens of the eye Timoshkina NT, Khodzhaev NS, Andronov SI, Latypov IA / Patent: RU 2143253 C1), consisting from a cylindrical body and a working loop with the possibility of changing its length to capture and dissection of the core. However, this device has significant drawbacks, the main of which is the difficulty of looping behind the lens nucleus, since cortical masses make it difficult to move the loop in the capsule bag. The use of bimanual technique using auxiliary tools leads to significant trauma to the surrounding tissues with the threat of various intra- and postoperative complications. Another significant drawback is the difficulties associated with the insertion of the loop into the anterior chamber through a small surgical incision in the folded state: due to its elastic-elastic properties, the loop tries to straighten out, therefore, it requires special surgical instruments and a certain level of training for the surgeon, which complicates the operation technique. requires a wider surgical incision, lengthens the operation and thereby increases its invasiveness. Given that this device is disposable.

2 v-o: o-gz -. g THEN if necessary, double fragmentation requires repeated

introduction of a new device. In addition, during loop fragmentation, an uncontrolled displacement of the nucleus occurs, which can also lead to various complications.

The technical problem to be solved with the help of the proposed utility model is effective, atraumatic and quite simple, from the point of view of surgical technique, fragmentation of the cataract lens nucleus in conditions of small incision surgery; reduction of operation time.

The technical result obtained by using the present invention is the removal of a fragmented nucleus through a small incision with minimal trauma to the surrounding tissues of the eye, and the nucleus can be fragmented many times to achieve the optimum ratio with the “throughput of a small incision.

The technical problem is solved in that the device for fragmentation of the nucleus of the natural lens of the eye consists of a cylindrical hollow metal body with a diameter in the range from 1 mm to 1.5 mm with a damped rounded working end. In the distal part of the side wall of the housing there is a longitudinal hole 10-12 mm long, not reaching the working end of the housing. A metal thread is placed inside the body, rigidly fixed from the inside to the distal end of the body and brought out of the body through its proximal end, with

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symmetry of the body with the formation of a working loop, the maximum size of which is greater than the maximum size of the nucleus of the natural lens of the eye, and its exit through an opening in the body.

The device is illustrated by the drawings shown in FIG. 1, 2, 3, 4.

The proposed device consists of a cylindrical hollow metal casing 1 (Fig. 1, 2) with a diameter in the range from 1 mm to 1.5 mm with a damped rounded working end 2. In the distal part of the side wall of the casing there is a longitudinal hole 3 (Fig. 1, 3 ) 10-12 mm long, not reaching the working end of the housing. Inside the casing, a metal thread 4 is fixed, rigidly fixed from the inside to the distal end of the casing and brought out of the casing through its proximal end, with the possibility of reciprocating movement along the longitudinal axis of symmetry of the casing with the formation of a working loop 5 (Fig. 4), the maximum size of which is larger, than the maximum size of the nucleus of the natural lens of the eye, and its exit through an opening in the casing 3.

Work with the proposed device is carried out as follows: during cataract extraction after capsulorexis, anterior capsulectomy, hydrodelineation and hydrodissection of the cortical masses under the cover of a viscoprotector, the working end of the casing 2 is inserted into the anterior chamber, the opening 3 is oriented downward. The introduced device is conducted over the nucleus into the thickness of the lens between the cortical masses and the cataract nucleus. Due to the forward movement of thread 4 and simultaneous small rotation

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body 1 clockwise or counterclockwise, a loop 5 is formed, which moves along the upper surface of the core to its equator. After the loop passes through the equator of the nucleus and reaches a size sufficient for grasping the nucleus with a spatula, introduced through paracentesis at 3 o’clock, the loop arc starts under the lens core while the cylindrical body rotates along the loop until the loop covers the cataract nucleus of the lens. Then, when performing the return movement of the filament 4, the lens core is fragmented. If necessary, additional fragmentation of the inventive device is reused without removing it from the anterior chamber of the eye by a similar technique with the difference that the loop is wound under a fragment of the nucleus.

The proposed device will improve the efficiency and safety of fragmentation of the nucleus of the cataract lens of any density, which in turn will expand the indications and possibilities of cataract surgery using a small incision. The proposed device will reduce the duration and reduce the invasiveness of surgical intervention during cataract extraction with a dense nucleus and reduce the number of intra- and postoperative complications.

Claims (1)

A device for fragmentation of the nucleus of the natural lens of the eye, consisting of a cylindrical hollow body and a working loop, characterized in that in the distal part of the side wall of the body there is a longitudinal hole 10-12 mm long that does not reach the working end of the body, while a metal thread is placed inside the body rigidly fixed from the inside to the distal end of the body and brought out of the body through its proximal end, with the possibility of reciprocating motion along the longitudinal axis of symmetry of the body with the image aniem loop, the maximum size of which is greater than the maximum size of the natural eye lens nucleus, and output it through the opening in the housing.