Sclera positioning marker

Abstract

The invention relates to a sclera positioning marker. The presently-provided marker can precisely mark the range of a sclera flap, and has the advantages of being simple in structure and convenient to use. According to the technical scheme, the sclera positioning marker is characterized by comprising a handle and a marking head which is positioned at the front end of the handle and provided with the cross section similar to a U shape, and the marking head can be rotatably positioned at the front end of the handle through a rotating shaft.

Description

technical field [0001] The invention relates to an ophthalmic surgical instrument, in particular to a trabeculectomy instrument. Background technique [0002] Trabeculectomy is a mature filtering surgery for various primary, secondary angle-closure and open-angle glaucoma, mixed glaucoma, and congenital glaucoma. Postoperative aqueous humor flows into the conjunctiva and the space under Tenon's capsule through the limbal filter, most of which are absorbed by the surrounding tissues, and a small part penetrates the conjunctiva to fuse with the tear film, or is absorbed by the blood vessels and lymphatic vessels around the incision, thereby effectively reducing the eye pressure. Internal pressure. [0003] In trabeculectomy, after the conjunctival flap is done, a scleral flap with a width of 3mm or 4mm, a height of 3mm or 4mm, and 1 / 2 the thickness of the sclera needs to be made on the top, and peeled toward the limbus to 1.5mm in front of the posterior boundary of the limbus...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the size of the scleral flap is directly related to the postoperative filtering effect, the incision edge of the scleral flap should be vertical and tidy, and there should be no cracks or tears in the scleral flap; this requires the doctor to use a diamond knife or a cautery device to make the sclera. The marking of the flap area should be as accurate and neat as possible, which is also difficult for experienced glaucoma surgeons, and it is a big test for beginners; if the distance cannot be accurately estimated, it will directly affect the production of the scleral flap. And affect the subsequent surgical effect;

[0006] 2. In the latest coaxial micro-incision cataract phacoemulsification combined with glaucoma trabeculectomy, because the cataract incision is reduced to 2mm, the size of the scleral flap in trabecular surgery is also reduced to 3mm×3mm, and the size of trabeculectomy is 1.8 ~2.0mm×0.8~1.0mm can further reduce surgical injury and is also beneficial to functional filtration; however, for experienced surgeons who are accustomed to using 4mm×4mm scleral flap, it is also possible to use 3mm×3mm scleral flap instead. There is a learning curve adaptation process, which can easily lead to deviations in the size of the scleral flap, which directly affects subsequent operations and surgical results

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