Cornea anterior matrix puncture needle

Abstract

The utility model provides a cornea anterior matrix puncture needle. The cornea anterior matrix puncture needle comprises a handheld part, a puncture part and a limiting part, the puncture part is provided with a three-edged puncture needle and a screw rod, one end of the screw rod is connected with the three-edged puncture needle, the handheld part is connected with the other end of the screw rod, and the limiting part is in threaded connection with the screw rod so that the limiting part can be close to or away from the three-edged puncture needle when rotating. The corneal anterior stroma puncture needle is simple in structure, mechanical stress on corneal stroma can be improved, the puncture depth of the needle head can be accurately controlled, and the handheld operation comfort degree is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ophthalmic medical instruments, and particularly relates to a corneal anterior stroma puncture needle. BACKGROUND

[0002] Recurrent corneal erosion (RCE) is a common recurrent corneal disease characterized by repeated separation between the corneal epithelium and the basement layer. The pathogenesis involves adhesion defects between epithelial cells and the basement layer, usually due to abnormalities in the epithelial basement membrane complex, which can lead to repeated episodes of corneal epithelial rupture, causing discomfort such as pain, blurred vision, tearing, and photophobia. Corneal anterior stroma puncture is a surgical method used to treat RCE cases. In the treatment of RCE, the puncture depth of the anterior stroma puncture needle usually reaches 5%-10% of the corneal stroma, about 90-130 μm. This depth can induce fibroblast reaction, enhance the adhesion between the corneal epithelium and the basement layer, stimulate the production of extracellular matrix proteins, induce scar formation, and improve epithelial adhesion. The current success rate of treating RCE is 66%-100%, and about 60% of patients who relapse after puncture treatment need to repeat the corneal anterior stroma puncture treatment.

[0003] Currently, the corneal anterior stroma puncture treatment uses a 25 or 27 gauge needle, which is bent about 90°, so that the needle is tangent to the corneal plane, and the needle tip is perpendicular to the corneal surface. However, the use of a curved needle may result in inconsistent corneal puncture depth, with the risk of corneal perforation if the puncture is too deep, and a high risk of RCE recurrence if the puncture is too shallow. In addition, the Chinese utility model patent with publication number CN201279214Y discloses a "corneal anterior stroma puncture needle" composed of a needle holder and a needle tube with a needle tip, and the needle tube has a bend at a distance of 0.1-0.2 mm from the needle tip to facilitate control of the depth of penetration. However, the stress of the puncture needle tip is concentrated at the tip during puncture, the mechanical stress on the corneal stroma tissue is small, the induced fibroblast reaction is light, the adhesion of the corneal epithelium and the basement membrane is poor, and RCE may recur again; the puncture depth of the current puncture needle is fixed, and the puncture depth of the cornea at different positions cannot be accurately controlled; in addition, the puncture needle design does not conform to ergonomics, and the comfort of hand-held operation is not good. SUMMARY

[0004] The utility model aims to solve at least one of the above technical problems to some extent. To this end, the utility model aims to provide a corneal anterior stroma puncture needle, which has a simple structure, can accurately control the puncture depth of the needle, can improve the mechanical stress on the corneal stroma, can reduce the recurrence rate of RCE, and has good comfort of hand-held operation.

[0005] In order to achieve the above object, the utility model provides a kind of corneal anterior stroma puncture needle, it includes: handpiece, puncture piece and limiting piece;

[0006] The puncture piece has a triangular puncture needle and a screw rod, one end of the screw rod is connected to the triangular puncture needle, the other end of the screw rod is connected to the handpiece, and the limiting piece is threadedly connected to the screw rod so that the limiting piece can approach or move away from the triangular puncture needle when it rotates.

[0007] According to the corneal anterior stroma puncture needle provided by the utility model, the distance between the limiting piece and the triangular puncture needle of the puncture piece can be adjusted through the threaded connection between the puncture piece and the limiting piece, the depth of the triangular puncture needle into the cornea is controlled by the contact between the limiting piece and the cornea, the mechanical stress on the corneal stroma can be improved by the triangular puncture needle, and the fibroblast reaction is induced.

[0008] In addition, the corneal anterior stroma puncture needle provided by the utility model can also have the following additional technical features:

[0009] Optionally, the limiting piece has a knob and a limiting part connected below the knob, and the limiting part is adapted to contact the cornea to limit the depth of the triangular puncture needle into the cornea.

[0010] Optionally, a plurality of marking lines are provided on the screw rod for reference by the limiting piece.

[0011] Further, the marking lines start from the connection between the triangular puncture needle and the screw rod and are arranged at intervals along the direction of the handpiece, and the interval of each marking line is 0.05 mm.

[0012] Optionally, the limiting piece further includes a damping part connected above the knob to allow the limiting piece to rotate with damping.

[0013] Optionally, the included angle between adjacent edges of the triangular puncture needle is 120°, and each edge is provided in a toothed manner.

[0014] Further, the length of the triangular puncture needle is 0.1 mm.

[0015] Optionally, the screw rod and the triangular puncture needle are of an integral structure.

[0016] Optionally, it further includes a nut, the handpiece is threadedly connected to the screw rod and locked by the nut. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1Structure diagram of the corneal anterior stroma puncture needle according to the embodiment of the utility model;

[0018] Mark explanation:

[0019] The hand-held piece 1, the puncture piece 2, the three-edge puncture needle 21, the screw rod 22, the mark line 23, the limiting piece 3, the pushing part 31, the limiting part 32, the damping part 33, the nut 4. DETAILED DESCRIPTION

[0020] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0021] In order to better understand the above technical solutions, the exemplary embodiments of the utility model will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the utility model and to enable the scope of the utility model to be fully conveyed to those skilled in the art.

[0022] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments.

[0023] The embodiments of the utility model will be described in detail below with reference to Figure 1 , the implementation of the corneal anterior stroma puncture needle according to the embodiments of the utility model is described in detail.

[0024] The corneal anterior stroma puncture needle according to the embodiments of the utility model comprises: a hand-held piece 1, a puncture piece 2 and a limiting piece 3.

[0025] Specifically, the puncture piece 2 has a three-edge puncture needle 21 and a screw rod 22, one end of the screw rod 22 is connected to the three-edge puncture needle 21, the other end of the screw rod 22 is connected to the hand-held piece 1, and the limiting piece 3 is threadedly connected to the screw rod 22, so that the limiting piece 3 can approach or move away from the three-edge puncture needle 21 when rotating.

[0026] That is, the puncture member 2 is provided with a three-edged puncture needle 21 and a screw rod 22, the three-edged puncture needle 21 is connected to one end of the screw rod 22, the other end of the screw rod 22 is connected with the handheld member 1, and the limiting member 3 is threadedly connected with the screw rod 22, so that the limiting member 3 can rotate to approach or move away from the three-edged puncture needle 21, thereby adjusting the exposed length of the three-edged puncture needle 21. In use, the three-edged puncture needle 21 penetrates into the corneal stroma, and the limiting member 3 contacts the cornea to limit the penetration depth of the three-edged puncture needle 21. In addition, the three-edged puncture needle 21 has better mechanical stress than ordinary needle, which can induce fibroblast reaction, improve the adhesion ability of corneal epithelium and basement membrane, and thus reduce the recurrence of RCE.

[0027] Therefore, through the threaded connection between the puncture member 2 and the limiting member 3, the distance between the limiting member 3 and the three-edged puncture needle 21 of the puncture member 2 can be adjusted, and the limiting member 3 contacts the cornea to control the penetration depth of the three-edged puncture needle 21 into the cornea. In addition, the three-edged puncture needle 21 can improve the mechanical stress on the corneal stroma, which is beneficial to induce fibroblast reaction. The corneal anterior stroma puncture needle has simple structure, can accurately control the penetration depth of the needle, can improve the mechanical stress on the corneal stroma, reduce the recurrence rate of RCE, and has good comfort in handheld operation.

[0028] Optionally, the limiting member 3 has a knob 31 and a limiting portion 32 connected below the knob 31, and the limiting portion 32 is adapted to contact the cornea to limit the penetration depth of the three-edged puncture needle 21 into the cornea. It can be understood that the knob 31 is provided to facilitate the user to manually rotate the limiting member 3 to adjust the distance between the limiting member 3 and the three-edged puncture needle 21, and the limiting portion 32 is provided to facilitate the three-edged puncture needle 21 to abut on the cornea when penetrating into the corneal stroma, thereby controlling the penetration depth of the three-edged puncture needle 21. The knob 31 and the limiting portion 32 can be an integral cylindrical body with different diameters, the outer diameter of the limiting portion 32 is smaller than that of the knob 31, and anti-slip patterns can be provided on the knob 31 to improve the friction between the hand and the knob 31.

[0029] Further, a plurality of marking lines 23 are provided on the screw rod 22 for the limiting member 3 to refer to. It can be understood that the marking lines 23 are provided to provide a reference for the operator, so that the user can control the penetration depth of the three-edged puncture needle 21 by using the limiting member 3 and the marking lines 23 as a reference. The marking lines 23 can be provided on the threaded segment at the end of the screw rod, and the marking lines 23 can be colored to improve visibility.

[0030] Further, the starting point of the marking line 23 is at the joint of the three-pronged puncture needle 21 and the screw rod 22, and is arranged at intervals along the direction of the hand-held piece 1, and the interval of each marking line 23 is 0.05 mm. It can be understood that, since the length of the three-pronged puncture needle 21 is usually fixed, by starting the marking line 23 at the joint of the three-pronged puncture needle 21 and the screw rod 22, the operator can judge the depth of the needle head of the three-pronged puncture needle 21 penetrating into the corneal stroma by matching the marking line 23, and the interval of the marking line 23 is set to 0.05 mm, which facilitates the operator to penetrate into the corneal stroma depth with a change of 0.05 mm, which is beneficial to induce fibroblast reaction. Wherein, the pitch of the screw rod 22 can be 0.05 mm matched with the marking line 23, that is, the displacement amount corresponding to one rotation of the driving part 31 is 0.05 mm, and the driving part 31 can also be provided with a marking line, which is beneficial to the operator to judge the number of rotation.

[0031] Optionally, the limiting piece 3 further comprises a damping part 33 connected above the driving part 31 to make the limiting piece 3 rotate with damping. It can be understood that, by setting the damping part 33, the limiting piece 3 and the screw rod 22 form a damping rotation, thereby improving the retaining capacity of the limiting piece 3 after adjustment and the distance between the limiting piece 3 and the screw rod 22. Wherein, the damping part 33 can be medical silica gel.

[0032] Optionally, the included angle between the adjacent edges of the three-pronged puncture needle 21 is 120°, and each edge is provided in a tooth shape. It can be understood that, by setting the included angle between the adjacent edges of the three-pronged puncture needle 21 to 120°, it is convenient to more evenly contact the corneal stroma to stimulate the production of extracellular matrix proteins, thereby inducing scar formation and improving epithelial adhesion, and at the same time, the strength of the whole three-pronged puncture needle 21 can be improved, and each edge is provided in a tooth shape, which can facilitate the contact of multiple edges with the corneal stroma, and can further stimulate the production of extracellular matrix proteins.

[0033] Further, the length of the three-pronged puncture needle 21 is 0.1 mm. It can be understood that, by setting the length of the three-pronged puncture needle 21 to 0.1 mm, it is convenient to match the requirement of the penetration depth of the corneal stroma. Wherein, the specification of the three-pronged puncture needle 21 can be a 30G puncture needle.

[0034] Optionally, the screw rod 22 and the three-pronged puncture needle 21 are of an integrated structure. It can be understood that, since the three-pronged puncture needle 21 is relatively small, by setting the screw rod 22 and the three-pronged puncture needle 21 in an integrated structure, it is beneficial to the processing and cost control. Wherein, the length of the screw rod 21 can be 9 mm.

[0035] Optionally, it further comprises a nut 4, the hand-held piece 1 is threadedly connected with the screw rod 22 and is locked by the nut 4. It can be understood that, by setting the nut 4, it is convenient to realize the disassembly of the three-pronged puncture needle 21 through the nut 4, which is convenient for the repeated use of the hand-held piece 1, and is beneficial to the cost control. Wherein, the hand-held piece 1 can be provided with anti-slip lines.

[0036] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0037] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more than two, unless otherwise specifically limited.

[0038] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature in the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or several embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0041] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A corneal pre-diasis puncture needle characterized by, The utility model relates to a handheld piece, a puncture piece and a limiting piece, and relates to a puncture device. The puncture piece has a three-edged puncture needle and a screw rod, one end of the screw rod is connected to the three-edged puncture needle, the handheld piece is connected to the other end of the screw rod, and the limiting piece is threadedly connected to the screw rod so that the limiting piece can be moved closer to or further away from the three-edged puncture needle when it is rotated. The limiting piece has a knob and a limiting part connected below the knob, and the limiting part is adapted to contact the cornea to limit the depth of the three-edged puncture needle when it is inserted into the cornea.

2. The corneal paracentesis needle of claim 1 wherein, The screw rod is provided with a plurality of marking lines that can be referenced by the limiting piece.

3. The corneal paracentesis needle of claim 1 wherein, The marking lines start at the connection between the three-edged puncture needle and the screw rod and are arranged at intervals along the direction of the handheld piece, and the interval of each marking line is 0.05 mm.

4. The corneal paracentesis needle of claim 3, wherein, The limiting piece also includes a damping part connected above the knob to dampen the rotation of the limiting piece.

5. The corneal paracentesis needle of claim 2 wherein, The included angle between the adjacent edges of the three-edged puncture needle is 120°, and each edge is provided in a toothed manner.

6. The corneal paracentesis needle of claim 1 wherein, The length of the three-edged puncture needle is 0.1 mm.

7. The corneal pre-dome puncture needle of claim 6, wherein, The screw rod and the three-edged puncture needle are of an integrated structure.

8. The corneal pre-dome puncture needle of claim 1 wherein, The handheld piece is threadedly connected to the screw rod and locked by a nut.

9. The corneal pre-dome puncture needle of claim 1 wherein, ​

Images