RU155189U1 - DEVICE FOR DOSED PUPPAR EXTENSION - Google Patents

Abstract

A device for dosed pupil expansion made of an elastic elastic polymer material containing a piece of silicone tube, characterized in that the piece of silicone tube has an inner diameter of 0.5 mm, a thickness of 0.2 mm, a length of 12.5 mm; a 0.4 mm wide strip is cut from the edge of the tube; at an angle of 30 ° to the longitudinal axis of the tube, laxative notches are applied to it with a pitch of 2 mm.

Description

DEVICE FOR DOSED PUPPAR EXTENSION

The utility model relates to medicine, in particular to ophthalmic surgery, and can be used in cataract extraction in patients with pseudoexfoliation syndrome.

Modern cataract surgery involves the removal of the lens through a small, self-sealing valve tunnel incision, which reduces intraoperative trauma and surgery time. In cases with complicated cataracts, one of the factors that increase the time and invasiveness of the operation is a narrow rigid pupil. According to the literature, the percentage of narrow pupils is 3.1% -10.8%, in elderly patients with pseudoexfoliation syndrome it can reach 40.2% (1).

A device for expanding the pupil is made of an elastic elastic polymer material containing a piece of silicone tube, which is an open ring element, the length of which varies from 3 to 16 mm, on the outer surface of the ring element there is a U-shaped groove and several eyes located in predetermined places. (2).

The disadvantages of this device for the expansion of the pupil is the inconsistency of the diameter of the pupil when it expands due to the different length of the annular element, the complexity of the design and the difficulties that arise when manipulating with this device for expanding the pupil.

This device is taken as a prototype.

The purpose of developing a utility model is to create a device for dosed pupil expansion, which allows the pupil to be stably, uniformly, slightly traumatic to expand the pupil to 5 mm and significantly simplify its implantation.

This goal is achieved in that the piece of silicone tube has an inner diameter of 0.5 mm, a thickness of 0.2 mm, a length of 12.5 mm; a 0.4 mm wide strip is cut from the edge of the tube; at an angle of 30 ° to the longitudinal axis of the tube, laxative notches are applied to it with a pitch of 2 mm.

Due to its constant diameter, the metered pupil dilator provides uniform stable mydriasis of 5 mm in size, sufficient for manipulations in the anterior chamber of the eye, due to the fact that the pupil edge of the iris is covered, trauma to the iris does not occur. The implantation of this pupil dilator does not require significant effort from the surgeon due to the simplicity of the design itself.

Comparison of the present invention with others known in the field of ophthalmology, shows its compliance with the criteria of a utility model.

A device for dosed pupil expansion made of an elastic elastic polymer material containing a piece of silicone tube with an inner diameter of 0.5 mm, a thickness of 0.2 mm and a length of 12.5 mm for the formation of persistent mydriasis with a diameter of 5 mm; a 0.4 mm wide strip is cut from the edge of the tube; at an angle of 30 ° to the longitudinal axis of the tube, laxative notches are applied to it with a pitch of 2 mm.

The device operates as follows.

A device for dosed pupil expansion is implanted through a tunnel into the anterior chamber of the eye, made of elastic elastic polymer material with an inner diameter of 0.5 mm, with a thickness of 0.2 mm and a length of 12.5 mm, to form a stable mydriasis with a diameter of 5 mm; during the operation of cataract phacoemulsification, a pupil dilator is formed by longitudinal excision of a 0.4 mm wide strip from the edge of this tube to fix the edge of the iris during its expansion; laxative notches are applied to the tube at an angle of 30 ° to

the longitudinal axis of the tube, for every 2 mm of the tube there is one notch, which allows it to have a constant rounded shape.

The use of the proposed incision is illustrated by a clinical example.

Clinical example.

Patient M., 60 years old.

Complaints: decreased vision in the right eye, fog in front of the eyes.

Anamnesis of the disease: According to the patient, the vision decreased gradually, painlessly for 1.5 years.

Prior to surgery, Vis OD = 0.2 n / k.

Objectively OD:

Orthophthalmus, the movement of the eyeball in full;

The edges of the eyelids are not thickened, the growth of eyelashes is correct;

The conjunctiva is pale pink;

The cornea is smooth, transparent, shiny;

Chamber of medium depth, moisture transparent;

The pupil is 2.5 mm in diameter, rigid, along the pupil edge of the iris of pseudoexfoliation, the reaction to light is sluggish; severe dystrophy of the pigment border and stroma of the iris;

The lens is almost cloudy in all departments, on the anterior capsule of the lens of pseudoexfoliation;

Reflex from the fundus is weakened, details of the fundus are not visible. TN.

Survey data:

SPL (B-scan): without additional echo signals.

Eye length 24.20 IOP = 17 mmHg

Calculation of IOL: PCL 15 diopters.

ZKL 17.5 diopters.

Diagnosis at admission: OD - Incomplete complicated cataract. Pseudoexfoliation syndrome.

Operation: Phacoemulsification of a cataract with implantation of a posterior chamber lens through a tunnel incision.

During the cataract phacoemulsification operation, in order to achieve a stable dosed mydriasis of 5 mm in size, a metered pupil dilator was formed from a piece of silicone tube 12.5 mm long with an internal diameter of 0.5 mm, with a thickness of 0.2 mm by excising a strip of width 0 from the edge of this tube. 4 mm to fix the edge of the iris as it expands. Next, laxative notches are applied to the tube for every 2 mm at an angle of 30 ° to the longitudinal axis of the tube.

After performing two paracentesis and corneoscleral tunnel, the anterior chamber is filled with viscoelastic. Through the tunnel injector of the claimed device is introduced into the front chamber. After completion of cataract phacoemulsification and IOL implantation, the device is displayed in the anterior chamber. Using the injector, the device is removed from the eye. During the operation, persistent atraumatic mydriasis of 5 mm was achieved.

After operation:

Vis OD = 0.8.

The technical result of the creation of the device is the possibility of dosed dilated pupil.

This useful model for dosed pupil expansion can be widely used for cataract phacoemulsification in medical ophthalmology departments of multidisciplinary hospitals and specialized ophthalmological clinics.

INFORMATION SOURCES:

1. Bakutkin V.V. The study of the functional reserve of the pupil in relation to the tasks of cataract microsurgery // Modern technologies of cataract surgery - 2004: Sat. scientific article on the materials of the V International Scientific and Practical Conference. - Moscow, 2004 .-- S. 52-53.

2. Patent US 8496583 B1, 07/30/2013.

Claims (1)

A device for dosed pupil expansion made of an elastic elastic polymer material containing a piece of silicone tube, characterized in that the piece of silicone tube has an inner diameter of 0.5 mm, a thickness of 0.2 mm, a length of 12.5 mm; a 0.4 mm wide strip is cut from the edge of the tube; at an angle of 30 ° to the longitudinal axis of the tube, laxative notches are applied to it with a pitch of 2 mm.