RU198932U1 - Irrigation cannula-iris-retractor - Google Patents

Abstract

The utility model relates to medicine, namely to ophthalmosurgery, and can be used for phacoemulsification of cataracts. The conical end of the metal tip of the standard aspiration cannula has a horizontal triangular groove 0.3 mm deep with an angle of 45 °, in which the pupillary edge of the iris is located and displaced it to the periphery of the eye, while simultaneously carrying out a constant supply of a balanced solution into the anterior chamber of the eye through the aspiration hole. The technical result is the possibility of simultaneous execution of two operational actions by one instrument, reducing the corneal trauma. 2 ill.

Description

The useful model relates to medicine, namely to ophthalmosurgery, and can be used for phacoemulsification of cataracts.

The main stages of phacoemulsification (FE) are the formation of an opening (capsulorhexis) in the anterior lens capsule (CC), fragmentation of the lens nucleus, removal of cortical masses with a bimanual or coaxial irrigation-aspiration system and implantation of an intraocular lens (IOL), for the effective and safe implementation of which the presence of the widest pupil (mydriasis), which in a large number of cases is unattainable due to involutional dystrophic changes in the iris (Takhchidi Kh.P., Egorova E.V., Tolchinskaya A.I. Intraocular correction in surgery of complicated cataracts. M., 2004. ). It is especially important to have adequate mydriasis at the stages of cortical mass removal and IOL implantation, because with a narrow pupil, due to poor visualization, part of the lens masses in the zone of the capsule equator may not be removed, and the IOL may be incorrectly implanted. Therefore, to control the implementation of the above stages of the operation with insufficient mydriasis, an additional examination of the peripheral parts of the CC is required by moving the pupillary edge of the iris to its root.

The closest analogue - the prototype of the proposed utility model is a tool-manipulator in the form of a spatula-pusher, including a handle and a working part of a different section bent from the axis of the handle, which ends with two "whiskers" in a vertical plane.

Disadvantages of the prototype:

1. A prerequisite for the safe use of the spatula-pusher is the need to constantly maintain the depth of the anterior chamber through the introduction of viscoelastic or balanced saline solution using an irrigation cannula;

2. When removing cortical lens masses with a bimanual irrigation-aspiration system, it is necessary to remove an aspiration cannula from the eye to insert a spatula-pusher into the eye cavity, which excludes the possibility of simultaneous removal of lens masses and displacement of the pupillary edge of the iris;

3. High risk of trauma to the edges of the corneal paracentesis due to the need for multiple insertion and withdrawal through the paracentesis of the spatula-pusher and the aspiration cannula;

4. When removing masses with a coaxial irrigation-aspiration system, inspection of the capsule bag under it using a pusher-spatula is impossible due to the high risk of damage to the CC.

The task is to develop an ophthalmic surgical instrument that combines the properties of an irrigation cannula and an iris retractor.

The technical result is the possibility of simultaneous execution of two operational actions by one instrument, reduction of corneal trauma.

The proposed utility model is illustrated by drawings:

FIG. 1. General view of the proposed irrigation cannula-iris retractor.

FIG. 2. An enlarged view of the tip of the irrigation cannula-iris retractor.

1. Suction opening.

2. Groove.

The technical result is achieved by the fact that in the conical end of the metal tip of the standard aspiration cannula, which is used for phacoemulsification of cataract at the stages of removing cortical lens masses and viscoelastic, a horizontal groove 2 of a triangular shape with a depth of 0.3 mm with an angle of 45 ° is cut (Fig. 2).

The proposed irrigation cannula-iris-retractor (Fig. 1) is used when performing phacoemulsification of a cataract. The irrigation cannula-iris-retractor is inserted into the anterior chamber of the eye through the previously performed corneal paracentesis, the pupillary edge of the iris is placed in groove 2 and displaced to the periphery of the eye, providing the required visualization of the peripheral parts of the CC. At the same time, through the aspiration hole 1 of the proposed irrigation cannula-iris retractor, a constant supply of a balanced solution is carried out into the anterior chamber of the eye to maintain its volume.

The advantages of the proposed utility model:

1. Technical simplicity of manufacture;

2. Possibility of simultaneous execution of two operational steps - to shift the pupillary edge of the iris and supply a balanced solution to maintain the depth of the anterior chamber;

3. The trauma of the corneal paracentesis margins is reduced, since there is no need for multiple insertion and removal of various instruments through paracentesis: an irrigation cannula and an iris retractor;

4. The use of the proposed irrigation cannula-iris retractor allows you to use the second hand of the surgeon to carry out any manipulations inside the eye.

Claims (1)

Irrigation cannula-iris-retractor, containing a handle and a metal tip with a hole, characterized in that the conical end of the metal tip of the cannula has a horizontal triangular groove 0.3 mm deep with an angle of 45 °, made with the possibility of positioning the pupillary edge of the iris in it and shifting it to the periphery of the eye, while the hole is made with the possibility of simultaneous implementation of a constant supply of a balanced solution to the anterior chamber of the eye.

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