Puncture needle for preventing prolapse of crystalline lens in penetrating keratoplasty

Abstract

The puncture needle comprises a puncture guide needle core and a flexible sleeve, the puncture guide needle core is sleeved with the flexible sleeve in a sliding mode, one end of the puncture guide needle core is arranged to be an inclined end with a certain angle relative to a body, and the other end of the puncture guide needle core is arranged to be an inclined end with a certain angle relative to the body. And the end part of one end, far away from the inclined end, of the flexible sleeve is blunt. The puncture guide needle core and the flexible sleeve enter from one end of the corneal limbus and then penetrate out of the corneal limbus on the opposite side, the puncture needle is fixed to the anterior chamber, the effect of preventing the crystalline lens from being disengaged is achieved, the risk that the crystalline lens is disengaged or even eye content is disengaged in the operation is reduced, meanwhile, after the suture stage in the operation is completed, the puncture guide needle core is firstly pulled out of the flexible sleeve, and the puncture guide needle core is pulled out of the flexible sleeve. The implant and the crystalline lens can be prevented from being damaged, the safety in use is improved, the insertion depth of the puncture guide needle core relative to the flexible sleeve can be limited through the design of the inclined end at one end of the puncture guide needle core, meanwhile, clamping of a needle holder is facilitated, and the stability and convenience in use are improved.

Description

Technical Field

[0001] The utility model relates to the field of penetrating keratoplasty, in particular to a puncture needle used for preventing lens from falling out during penetrating keratoplasty. Background Art

[0002] Penetrating keratoplasty is a procedure that replaces the full-thickness recipient cornea with a donor cornea. It is the most commonly performed corneal transplantation procedure in clinical practice. In some complex patients, such as those with congenital glaucoma, ocular trauma, infected corneal ulcers, and chemical injuries, pupil defects, atrophy, or dilation are often present. For such phakic patients undergoing penetrating keratoplasty, the risk of lens or even ocular contents falling out is high during the cleavage stage because the pupil cannot shrink during the operation.

[0003] How to invent a simple device for preventing lens dislocation during penetrating keratoplasty to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a puncture needle for preventing lens dislocation during penetrating keratoplasty, aiming to improve the problem of high risk of lens dislocation and even dislocation of ocular contents during the cleavage stage of penetrating keratoplasty due to the inability of the pupil to shrink during the operation.

[0005] The utility model is implemented as follows: a puncture needle used to prevent lens dislocation during penetrating keratoplasty, comprising a puncture guide needle core, the puncture guide needle core is slidably sleeved in a flexible sleeve, and one end of the puncture guide needle core is arranged as an inclined end with a certain angle relative to the body.

[0006] In a preferred technical solution of the present utility model, one end of the flexible sleeve is configured as a blunt end.

[0007] The beneficial effect of the utility model is as follows: the utility model obtains a puncture needle for preventing lens dislocation during penetrating keratoplasty through the above-mentioned design. When in use, the puncture guide needle core and the flexible sleeve are inserted from one end of the corneal margin together, and then penetrated from the opposite corneal margin. The puncture needle is fixed in the anterior chamber, which plays a role in blocking the lens from dislodging, reducing the risk of lens dislocation or even dislodging of eye contents during surgery. At the same time, after the intraoperative suturing stage is completed, the puncture guide needle core is first pulled out of the flexible sleeve, and then the flexible sleeve is pulled out, which can avoid damage to the implant and the lens and improve safety during use. The inclined end design of one end of the puncture guide needle core can limit its insertion depth relative to the flexible sleeve, and also facilitates the clamping of the needle holder, thereby improving stability and convenience during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is a schematic three-dimensional diagram of the overall structure provided by the embodiment of the utility model;

[0010] Figure 2 A schematic three-dimensional diagram of the overall cross-sectional structure provided for an embodiment of the utility model;

[0011] Figure 3 The utility model embodiment provides Figure 2 The enlarged structural schematic stereogram at A in the middle;

[0012] In the figure: 1-puncture guide needle core; 2-flexible sleeve; 101-inclined end; 201-blunt end. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figures 1 to 3 The utility model provides a technical solution: a puncture needle used to prevent lens dislocation during penetrating keratoplasty, comprising a puncture guide needle core 1 and a flexible sleeve 2, the puncture guide needle core 1 is slidably sleeved in the flexible sleeve 2, and one end of the puncture guide needle core 1 is set as an inclined end 101 with a certain angle relative to the body.

[0015] See also Figure 3 The end of the flexible sleeve 2 away from the inclined end is blunt 201.

[0016] After the surgical suture, the puncture guide needle core 1 is first pulled out from the flexible sleeve 2, and the needle tip of the puncture guide needle core 1 is retracted from the inside of the flexible sleeve 2 to avoid the needle tip damaging the implant and the lens. Then the flexible sleeve 2 is pulled out, and by setting one end thereof as a blunt end 201, damage to the implant and the lens is also avoided, thereby improving safety during use.

[0017] Working principle: During puncture, the puncture guide needle core 1 and the flexible sleeve 2 are inserted from one end of the corneal margin together, and then passed through the opposite corneal margin. The puncture needle is fixed in the anterior chamber to prevent the lens from falling out. After the penetrating keratoplasty suture is completed, the puncture guide needle core 1 is pulled out first. Since the puncture guide needle core 1 is withdrawn from the flexible sleeve 2, its needle tip will not damage the implant and the lens. Then the flexible sleeve 2 is pulled out. The flexible sleeve 2 and its blunt end 201 design can also avoid damaging the implant and the lens, ensuring safety during use. At the same time, the inclined end 101 design at one end of the puncture guide needle core 1 can limit the insertion depth of the puncture guide needle core 1 relative to the flexible sleeve 2, ensuring stability during use. It is also more convenient for the operator to clamp it with a needle holder, thereby improving convenience during use.

[0018] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A puncture needle for preventing lens dislocation during penetrating keratoplasty, characterized in that: The utility model comprises a puncture guide needle core and a flexible sleeve. The puncture guide needle core is slidably sleeved in the flexible sleeve. One end of the puncture guide needle core is arranged as an inclined end with a certain angle relative to the body.

2. The puncture needle for preventing lens dislocation in penetrating keratoplasty according to claim 1, characterized in that: An end portion of the flexible sleeve away from the inclined end is blunt.

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