Tearing instrument for corneal posterior lamella in ophthalmology

Abstract

The invention relates to a tearing instrument for the corneal posterior lamella in the ophthalmology. The tearing instrument for the corneal posterior lamella in the ophthalmology comprises tearing forceps and auxiliary hooks; the tearing forceps are provided with a forceps handle, forceps arms, inclined clamping arms and forceps teeth; the forceps handle is connected with the two forceps arms; the inclined clamping arms are connected with the two forceps arms respectively, and the forceps teeth are located at the tail ends of the inclined clamping arms; an include angle is formed between eachinclined clamping arm and the corresponding forceps arm. The direction of the forceps teeth faces the inner sides of the inclined clamping arms. The auxiliary hooks are provided with hook handles, hook arms and hook heads, and the hook arms are connected to the lower ends of the hook handles; the hook arms are downward bent in the reverse direction, and the bent direction of the hook arms is identical to that of the inclined clamping arms. The tearing instrument for the corneal posterior lamella in the ophthalmology has the advantages that through the tearing surgery of the anterior chamber corneal posterior lamella, the case of the turbid residual corneal posterior lamella after deep anterior lamella keratoplasty can be prevented from secondary keratoplasty; meanwhile, decompensation ofthe function of corneal endothelium cannot be caused. The instrument is convenient to operate, the cost can be lowered, and the complication risks are reduced.

Description

technical field [0001] The invention relates to the technical field of ophthalmic clinical treatment, in particular to a set of ophthalmic corneal posterior lamellar tearing instruments. Background technique [0002] The cornea can be divided into 5 layers from the physiological and anatomical structure: epithelial cell layer, Bowman's membrane, stroma layer, posterior lamellar layer, and endothelial cell layer. Penetrating keratoplasty is the method of replacing the full-thickness turbid cornea with a full-thickness transparent cornea. A trephine drill with a certain diameter is used to drill out the full-thickness cornea, and then a trephine drill with the same diameter or a slightly larger diameter is used to drill the donor cornea. , tightly sewn on the receptor membrane with nylon thread. Lamellar keratoplasty is a partial-thickness corneal transplantation. Only the superficial corneal tissue with lesions is removed, and the recipient corneal cornea in the deep layer i...

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Problems solved by technology

[0007] However, the above-mentioned patent documents have not been disclosed about the technical solutions that can be used to tear the descemet membrane through the anterior chamber in ophthalmic microsurgery, and can play an auxiliary reverse fixation effect on the anterior chamber during the operation.

[0008] To sum up, there is an urgent need for a set of special corneal posterior lamellar tearing instruments, which can tear the corneal posterior lamellar through the anterior chamber, and can assist in reverse fixation of the cornea during surgery, enabling deep lamellar keratoplasty. A tearing device that avoids secondary keratoplasty in cases of residual corneal posterior lamellar opacity and does not cause decompensation of corneal endothelial function has not been reported yet

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