RU44490U1 - Tweezers for Phacofragmentation - Google Patents

Abstract

The utility model relates to medical equipment, namely to micro-instruments in ophthalmology and can be used to fragment the lens nucleus during surgery for cataracts through a small tunnel incision. Technical essence: tweezers consists of two rigidly connected spring jaws with working jaws at the ends, the jaws are located to the jaws at an obtuse angle, one of the jaws has a tooth along the entire length of the sponge, and the other two teeth along the entire length for the tooth of the opposite jaw to enter between them. The use of tweezers of the proposed design provides maximum capture of the lens nucleus along the entire length during surgery, which facilitates the fragmentation process, reduces the invasiveness of surrounding tissues, reduces the time of surgery, as well as surgical and postoperative complications.

Description

The utility model relates to medical equipment, namely to micro-instruments in ophthalmology and can be used to fragment the lens nucleus during surgery for cataracts through a small tunnel incision.

A device is known for fragmenting the lens nucleus (RF patent No. 2167635 dated 05/27/2001), containing the mechanism of destruction of the nucleus, made in the form of two external and internal tubes placed in one another and an aspiration system. Both tubes are equipped with a common longitudinal through cut with teeth at the ends of the cut of each tube. After introducing the sclera through the tunnel incision into the anterior chamber, the eyes of the device tip inform the inner tube by means of a drive reciprocating movements along the outer tube. Performing reciprocating movements, the teeth of the inner tube, working together with the teeth of the outer tube, perform a furrow on the entire thickness of the lens nucleus. The disadvantage of this device is the difficulty of working with this device in the anterior chamber of the eye, the high morbidity for the surrounding tissues during the execution of the groove of the lens nucleus, as well as the complexity of use.

The closest in technical essence is the tweezers-fragmentator (RF patent No. 2194463 dated 12/20/2002), containing two rigidly connected springy branches with working jaws at the ends, the jaws are located to the branches at an obtuse angle. One of the sponges has one tooth at the end, and the other has two teeth for the tooth of the opposite jaw to enter between them in the plane of separation of the jaws. The sponges have a variable cross-section along the length, which tapers towards the teeth. The inner surface of the working jaws is wedge-shaped with the ability to contact each other with the pointed ends of the wedges in the plane of separation of the branches. Branches have an angle of information of 3-5 °. The wedge angle in the cross section is 60 °, the length of the working jaws is at least 10.5 mm.

The specified device does not provide sufficient capture of the lens nucleus throughout the thickness for its fragmentation, which leads to trauma to the surrounding tissues (iris, corneal endothelium), as well as to repeated manipulations in the anterior chamber of the eye.

EFFECT: reduction of operational and postoperative complications, reduction of trauma for surrounding tissues, reduction of operation time.

The technical result is achieved using tweezers for phakofragmentation of dense nuclei, containing two rigidly connected springy branches with working jaws at the ends, the lips are located to the branches at an obtuse angle, one of the sponges has one tooth and the other two teeth for the teeth of the opposite jaw to enter between them in the plane of separation of the branches. characterized in that one of the sponges has a tooth along the entire length of the sponge, and the other has two teeth along the entire length of the sponge.

The presence of a tooth along the entire length of the sponge on one jaw and two on the other, for the tooth of the opposite jaw to come in between, provides maximum capture of the lens nucleus along the entire length, which facilitates the fragmentation process, reduces the trauma of surrounding tissues, reduces the time of surgery, as well as operating and postoperative complications.

Figure 1 shows a General view of the tweezers for phacofragmentation, figure 2 - work item.

The proposed tweezers consists of two rigidly connected springy branches (1) with working jaws at the ends (2), the jaws are located to the jaws at an obtuse angle. One of the sponges has one tooth (3) along the entire length, the other has two teeth (4) along the entire length for the tooth of the opposite jaw to enter between them in the plane of breeding of the jaws. The jaws (2) have a variable cross section in length. The inner surface of the working jaws (2) has a wedge-shaped shape with the ability to contact each other with the pointed ends of the wedges in the plane of separation of the branches

(1). The branches (1) have an angle of information of 3-5 °. The wedge angle in the cross section is 60 °, the length of the working jaws (2) is at least 10.5 mm.

The proposed tweezers are used as follows:

A 5 mm long sclerotic-corneal incision is made with a diamond blade, after paracentesis, the introduction of viscoelastic into the anterior chamber, circular capsulorexis, hydrodissection are performed according to the standard procedure, the lens nucleus is inserted at an angle of 45 ° into the anterior chamber, tweezers are inserted into the anterior chamber of the eye and connect the springy branches (1) with the working jaws at the ends (2) with each other. Using one sponge having one tooth (3) along the entire length and another having two teeth (4) along the entire length, a part of the lens is fragmented. A fragment of the nucleus is removed using the same tweezers. Fragmentation of the entire lens nucleus is carried out in 2-3 stages.

Example 1 Patient K., 65 years old. Diagnosis: OD Mature age-related cataract. Visual acuity before surgery, light perception with the correct projection. During the operation of mechanical phacofragmentation with IOL implantation through a self-sealing tunnel incision after paracentesis, filling of the anterior chamber, circular capsulorexis with viscoelastic, removal of the lens at an angle of 45 ° into the anterior chamber, the proposed tweezers fragment the lens core into 2 parts, which are removed alternately through the same pin tunnel section. The following steps of the operation are performed according to a standard technique. The next day: the cornea is transparent, the anterior chamber is of medium depth, the moisture is clean, the IOL in the capsule bag. Visual acuity of 0.7 without correction.

The use of tweezers of the proposed design provides maximum capture of the lens nucleus along the entire length during surgery, which facilitates the fragmentation process, reduces the invasiveness of surrounding tissues, reduces the time of surgery, as well as surgical and postoperative complications.

Claims (1)

Phacofragmentation tweezers containing two rigidly connected spring jaws with working jaws at the ends, jaws located at an obtuse angle to the jaws, one of the jaws has one tooth and the other two teeth for the tooth of the opposite jaw to enter between them in the plane of separation of the jaws, characterized in that one of the sponges has a tooth along the entire length of the sponge, and the other has two teeth along the entire length of the sponge.