RU167161U1 - INDIVIDUAL DRAINAGE FOR THE OUTflow OF INLINE EYE - Google Patents

Abstract

Individual drainage for the outflow of intraocular fluid, made of biocompatible material and having an opening, characterized in that it is a T-shaped plate with a smooth surface, a thickness of up to 80 microns, a width of up to 5.0 mm, with a short arm length of up to 8 mm, long shoulder up to 25.0 mm, with a hole in the long shoulder with a diameter of up to 4.0 mm; made by three-dimensional computer simulation based on the data of eye biometry and intraocular pressure by laser cutting with numerical control from polytetrafluoroethylene.

Description

The utility model relates to the field of medicine, namely to medical devices used to improve the outflow of intraocular fluid in cases of impaired hydrodynamics and glaucoma.

A device for filtering the moisture of the anterior chamber into the subconjunctival space for glaucoma of varying degrees of development, consisting of a plastic, rectangular plate with round holes (1).

The disadvantage of this device is the unstable fixation of the device in the anterior chamber of the eyeball, and, as a result, the uncontrolled outflow of intraocular fluid.

A device for the outflow of intraocular fluid, which is a metal tube without coating, with a locking plate (2).

The disadvantage of this device is the excessive load on the surrounding tissue in place of fixation, excessive fluid filtration.

Known drainage for the outflow of intraocular fluid, made of a biocompatible polymethyl methacrylate material in the form of an elongated tube with side holes (3). This drainage is taken by us as a prototype.

Disadvantages: the difficulty of preliminary calculation of individual sizes of drainage, insufficient filtration of intraocular fluid, a high risk of rejection and exposure of drainage in the postoperative period. The shape of the drainage promotes obstruction of the canal with connective tissue, which subsequently leads to the absence of outflow of intraocular fluid.

The purpose of the utility model is to create drainage that maintains its shape for a long time under the conditions of the human body, is stably held in the formed channel, repels cellular elements from the surface and provides a constant outflow of intraocular fluid.

This goal is achieved in that the drainage is a T-shaped plate with a smooth surface, a thickness of up to 80 microns, a width of up to 5.0 mm, with a length of short arm up to 8 mm, long arm up to 25.0 mm, with a hole in the long shoulder diameter up to 4.0 mm; made by three-dimensional computer simulation based on the data of eye biometry and intraocular pressure by laser cutting with numerical control from polytetrafluoroethylene.

The technical result of the use of drainage is the long-term provision of a constant outflow of intraocular fluid.

The drainage is made of biocompatible and hydrophobic polytetrafluoroethylene material. Due to this, it can be in a biological object for a long time without changing its shape, impaired fluid outflow and without a reaction of the biological system's immune system to it. The material does not sprout with blood vessels and connective tissue, which ensures a constant long-term outflow of intraocular fluid.

Thanks to preliminary three-dimensional computer modeling based on biometric data of the eye and intraocular pressure, the dimensions of the drainage are selected individually, as a result of which it takes the size and shape of the section with high accuracy. The drainage surface is smooth, which allows the outflow of intraocular fluid.

Individual drainage for the outflow of intraocular fluid is a T-shaped plate with a smooth surface, a thickness of up to 80 microns, a width of up to 5.0 mm, with a length of short arm up to 8 mm, long arm up to 25.0 mm, with an opening in the long arm diameter up to 4.0 mm; made by three-dimensional computer simulation based on the data of eye biometry and intraocular pressure by laser cutting with numerical control from polytetrafluoroethylene.

Individual drainage for the outflow of intraocular fluid is used as follows. Before the operation, the patient undergoes eye biometrics and measures intraocular pressure. They analyze the data, and then perform three-dimensional computer simulation of individual drainage. It is produced by laser cutting with numerical control from polytetrafluoroethylene and is used to provide long-term continuous outflow of intraocular fluid intraoperatively.

Clinical example. Patient K., 67 years old, was admitted to the glaucoma department of GBUZ SOKOB them. T.I. Eroshevsky 01/12/15 with a diagnosis of Decompensated 3 ^c open-angle glaucoma of the right eye, visual acuity 0.1. The use of antihypertensive drugs did not produce the expected effect. The patient was performed ultrasound biometry of the eye. Intraocular pressure at admission was 35 mm Hg. A three-dimensional computer simulation of individual drainage was made and its manufacture by laser cutting with numerical control from polytetrafluoroethylene. Drainage is sterilized and implanted to the patient during corneosclerotomy. The size and shape of the drainage fit perfectly, there were no intraoperative complications with the installation of the drainage. In the postoperative period, drainage functioned, maintaining a long-term constant outflow of intraocular fluid.

The proposed individual drainage was used in 8 patients, positive results were obtained, during the follow-up examination after 1, 3, 6 months and 1 year, intraocular pressure was compensated after the operation, there were no complications, and the patients did not complain.

Individual drainage can be used in ophthalmology departments to ensure a constant long-term outflow of intraocular fluid in patients with impaired hydrodynamics and glaucoma.

Information sources:

1. Alekseev V.N. Complications and causes of failure of antiglaucomatous operations: Dis. ... Dr. honey. Sciences-L., 1986.

2. Kurysheva NI, Marnykh SA, Kizeev M.V. et al. Intrascleral implantation of amnion in the prevention of excessive scarring after antiglaucomatous operations // Glaucoma - 2005 - No. 1 - P. 2935.

3. Burgoyne J.K., Wu Dunn D., Lakhani V., Cantor L.B. Outcomes of sequential tube shunts in complicated glaucoma // Ophthalmology. 2000. Vol. 107. No. 2. P. 309-314.

Claims (1)

Individual drainage for the outflow of intraocular fluid, made of biocompatible material and having an opening, characterized in that it is a T-shaped plate with a smooth surface, a thickness of up to 80 microns, a width of up to 5.0 mm, with a short arm length of up to 8 mm, long shoulder up to 25.0 mm, with a hole in the long shoulder with a diameter of up to 4.0 mm; made by three-dimensional computer simulation based on the data of eye biometry and intraocular pressure by laser cutting with numerical control from polytetrafluoroethylene.