A marker for anterior lens capsule

Abstract

The present invention discloses a marker for the anterior capsule of the lens, belonging to the technical field of medical devices; the disclosed marker comprises a ring body provided with a fracture, the ring body is a hollow tubular structure, and the tube opening at one end of the ring body located at the fracture is a dye injection port; the side of the ring body used for contacting the anterior capsule of the lens is provided with a liquid outlet structure, and the liquid outlet structure is used for the dye in the ring body to form a color mark distributed continuously or discontinuously along the same circumference on the anterior capsule of the lens. The above scheme can solve the problem that the current corneal marking equipment is easily affected by eye movement or other factors. The accuracy of CCC can be avoided, and the interference to the surgeon during the capsulorhexis operation can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a marker for anterior lens capsule. Background Art

[0002] Continuous Curvilinear Capsulorhexis (CCC) is a key step in modern cataract surgery. Successful CCC is crucial to the safety of phacoemulsification and intraocular lens (IOL) implantation. At the same time, as cataract surgery progresses from blindness prevention to refractive surgery, functional IOLs (including astigmatism correction, multifocal and extended depth of focus IOLs) are becoming more and more widely used. These IOLs are more sensitive to accurate positioning, which requires greater accuracy and repeatability in the size, shape and centering of the anterior capsulotomy / incision.

[0003] Previous studies have shown that the size and circularity of the capsulorhexis opening in CCC surgery are very important: if the capsulorhexis opening is too small, it may cause fibrosis and hyperopic drift, or even severe contraction of the capsular bag and dislocation of the IOL-capsular bag complex; if the capsulorhexis opening is too large or asymmetric, the IOL may affect vision and visual quality due to tilt, rotation, decentration, or posterior capsule opacification.

[0004] Therefore, the ideal CCC should be well-centered and accurate in size, and can perfectly cover the optical zone of the IOL at 360°. However, since most cataract surgeries are currently performed by manual operation, inaccuracy of CCC is inevitable. Therefore, in order to ensure high-quality manual CCC, the existing technology mainly uses intraoperative navigation or corneal marker guidance, but these devices can only provide guidance outside the cornea, and the accuracy of CCC is easily affected by eye movement or other factors during the operation. Summary of the invention

[0005] The invention discloses a marker for the anterior capsule of the lens, so as to solve the problem that the accuracy of CCC is easily affected by the movement of the eye or other factors in the current corneal marking equipment, and avoid interference to the surgeon during the capsulotomy operation.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A marker for the anterior capsule of the lens, comprising a ring body provided with a fracture, the ring body being a hollow tubular structure, and an end of the ring body located at the fracture being a dye injection port; a liquid outlet structure is provided on one side of the ring body for contacting the anterior capsule of the lens, the liquid outlet structure being used for the dye in the ring body to form a colored mark on the anterior capsule that is continuously or discontinuously distributed along the same circumference.

[0008] Optionally, the liquid outlet structure is a plurality of holes spaced apart along the extension direction of the ring body, and the plurality of holes are located on the same circumference and are respectively connected to the lumen of the ring body; the hole diameter is smaller than the inner diameter of the lumen of the ring body.

[0009] Optionally, the apertures of the plurality of holes gradually increase from a position close to the dye injection port to a position far away from the dye injection port.

[0010] Optionally, the liquid outlet structure is a slit arranged along the extension direction of the ring body, and the slit is located on the same circumference and is connected to the lumen of the ring body; the width of the slit is smaller than the inner diameter of the lumen of the ring body.

[0011] Optionally, the other end of the ring body located at the fracture is a closed end; the closed end is provided with an exhaust hole, which is connected to the tube cavity of the ring body and is located downstream of the liquid outlet structure, and the aperture of the exhaust hole is smaller than the tube diameter of the tube cavity.

[0012] Optionally, the exhaust hole is located at an end surface of the closed end; or, the exhaust hole is located at the other side of the closed end opposite to the liquid outlet structure.

[0013] Optionally, the end surface of the closed end is configured to be an outwardly protruding arc structure.

[0014] Optionally, the ring body is in the shape of a ring; the cross-section of the ring body is circular, or the cross-section of the ring body is arcuate.

[0015] Optionally, the fracture corresponds to a central angle of the ring body of 15-20°.

[0016] Optionally, the marker further comprises a hose and a dye injector; one end of the hose is connected to the dye injection port, and the other end of the hose is connected to the dye injector.

[0017] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0018] The marker for the anterior capsule of the lens disclosed in the present invention can first send one end of the ring body at the break into the anterior chamber of the eye from the corneal incision, and then move in a clockwise or counterclockwise direction until the entire ring body is completely implanted in the anterior chamber of the eye, and make the side of the ring body provided with the liquid outlet structure stick to the target area on the surface of the anterior capsule of the lens, so that the dye can enter the lumen through the dye injection port of the ring body, and flow along the lumen to the target area on the surface of the anterior capsule of the lens where the liquid outlet structure forms a colored mark distributed continuously or discontinuously along the same circumference, providing effective guidance for the position, size and roundness of the capsulotomy opening; therefore, the marker disclosed in the present invention can perform dyeing and marking on the anterior capsule of the lens, so that the dyeing mark guiding the CCC surgery is located at the same level as the CCC surgery, and compared with the existing corneal marking equipment, it avoids the guidance error caused by factors such as eye movement during the operation, thereby effectively improving the accuracy and quality of the CCC; at the same time, after the dyeing and marking is completed, the ring body can exit the anterior chamber of the eye through the main incision, thereby avoiding its interference with the subsequent capsulotomy operation of the surgeon. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a bottom view structural schematic diagram of a marker for anterior lens capsule disclosed in an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the end of the ring body located at the fracture disclosed in the embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of a circular cross section of a ring body disclosed in an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of a ring body disclosed in an embodiment of the present invention having an arcuate cross section;

[0024] Figure 5 It is a schematic diagram of the marking effect of the marker disclosed in the embodiment of the present invention;

[0025] Figure 6 Another structural schematic diagram of the liquid outlet structure disclosed in an embodiment of the present invention;

[0026] Description of reference numerals:

[0027] 100-ring body, 101-closed end, 102-lumen, 103-dye injection port, 104-vent, 110-break, 120-hole, 130-gap, 200-hose, 300-dye syringe. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The technical solutions disclosed in various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Please refer to Figures 1 to 6 As shown, an embodiment of the present invention discloses a marker for the anterior capsule of the lens, and the disclosed marker includes a ring body 100 provided with a break 110, the ring body 100 is a hollow tubular structure, and the tube opening at one end of the ring body 100 located at the break 110 is a dye injection port 103; a liquid outlet structure is provided on the side of the ring body 100 that is used for contacting the anterior capsule of the lens, and the liquid outlet structure is used for the dye in the ring body 100 to form a colored mark that is continuously distributed or discontinuously distributed along the same circumference on the anterior capsule of the lens.

[0031] Among them, one end of the ring body 100 can be first sent into the anterior chamber of the eye from the corneal incision through the fracture 110, and then move in a clockwise or counterclockwise direction until the entire ring body 100 is completely implanted in the anterior chamber of the eye, and the side of the ring body 100 provided with the liquid outlet structure is attached to the target area on the surface of the anterior capsule of the lens, so that the dye can enter the lumen 102 through the dye injection port 103 of the ring body 100, and flow along the lumen 102 to the target area on the surface of the anterior capsule of the lens where the liquid outlet structure forms a colored mark that is continuously or discontinuously distributed along the same circumference, thereby providing effective guidance for the position, size and roundness of the capsulorhexis opening.

[0032] Therefore, the marker disclosed in this embodiment can perform dyeing and marking on the anterior capsule of the lens, so that the dyeing mark guiding the CCC surgery is located at the same level as the CCC surgery. Compared with the existing corneal marking equipment, it avoids the guidance error caused by factors such as eye movement during the operation because the CCC surgery and its guiding mark are located in different inner and outer eye structure layers respectively, thereby effectively improving the accuracy and quality of CCC; at the same time, after completing the dyeing and marking, the ring body 100 can exit the anterior chamber of the eye through the main incision, thereby avoiding its interference with the subsequent surgeon's capsulotomy operation.

[0033] In the marker disclosed in this embodiment, as an implementable embodiment of the liquid outlet structure, the liquid outlet structure can be designed as a plurality of holes 120 spaced apart along the extension direction of the ring body 100, and the plurality of holes 120 are located on the same circumference and are respectively connected to the lumen 102 of the ring body 100, so that after dyeing, a liquid outlet structure can be formed in the anterior capsule of the lens. Figure 5 To prevent the dye from flowing out of the hole 120 and affecting the reference mark, the hole 120 has a diameter smaller than the inner diameter of the lumen 102 of the ring body 100. Usually, the hole diameter φ can be set to 0.05 mm to 0.1 mm, and the tube diameter φ of the ring body 100 can be set to 0.6±0.05 mm.

[0034] Specifically, Figure 1 As shown, the number of holes 120 is 12, and they are evenly distributed along the same circumference, thereby ensuring that the marking points formed after dyeing have a good circular guiding effect, and avoiding affecting the structural strength of the ring body 100 due to the large number of holes 120 in the ring body 100; and the size of the fracture 110 is preferably such that the corresponding central angle is 15 to 20°, which does not affect the even distribution of the 12 holes 120, and ensures that the fracture 110 allows the surgeon to smoothly pass the ring body 100 through the corneal incision into the anterior chamber of the eye.

[0035] It is easy to understand that, since the dye flows along the ring body 100 under the action of external pressure, it first flows through the hole 120 close to the dye injection port 103 and then flows through the hole 120 away from the dye injection port 103. Therefore, in order to avoid the hole 120 away from the dye injection port 103 not seeing the dye when pushing the dye and the hole 120 close to the dye injection port 103 flowing out of the dye, it is preferred that the aperture of the hole 120 gradually increases from the position close to the dye injection port 103 to the position away from the dye injection port 103.

[0036] In this way, the pressure required for the small hole that flows through the position first (upstream) is large, and the pressure required for the large hole that flows through the position later (downstream) is small, thereby ensuring that the dye from the hole 120 far away from the dye injection port 103 can be discharged smoothly, and avoiding the problem of dye contamination affecting the reference mark caused by excessive outflow of dye from the hole 120 close to the dye injection port 103; it should be noted that the distance between the hole 120 and the dye injection port 103 is defined by the length of the distance the dye flows through along the ring body 100 starting from the dye injection port 103, and the longer the flow distance, the farther it is, and the shorter the flow distance, the closer it is.

[0037] Other possible implementations of the liquid outlet structure include: Figure 6As shown, the liquid outlet structure can also be a slit 130 arranged along the extension direction of the ring body 100, and the slit 130 is located on the same circumference and is connected to the lumen 102 of the ring body 100; the width of the slit 130 is smaller than the inner diameter of the lumen 102 of the ring body 100, and usually the width of the slit 130 is 0.05mm to 0.1mm, so that after staining, a continuous arc-shaped marking line extending along the circumference can be formed on the anterior capsule of the lens.

[0038] In the marker disclosed in this embodiment, in order to prevent the dye from flowing out from the other end of the ring body 100 at the break 110, the other end of the ring body 100 at the break 110 is set as a closed end 101. In order to prevent the air in the ring body 100 from hindering the smooth flow of the dye along the lumen 102, preferably, an exhaust hole 104 can be set at the closed end 101, the exhaust hole 104 is connected to the lumen 102 of the ring body 100, and is located at the downstream position of the liquid outlet structure, and the aperture of the exhaust hole 104 is smaller than the diameter of the lumen 102.

[0039] Among them, Figure 2 As shown, the exhaust hole 104 can be arranged on the end surface of the closed end 101, so as to effectively avoid the influence of bubbles generated when exhausting air on the position of the ring body 100 and the dyeing mark at the position of the liquid outlet structure.

[0040] Of course, as other setting positions of the exhaust hole 104, it can also be set on the other side of the closed end 101 opposite to the liquid outlet structure, that is, the side facing the cornea after the ring body 100 is implanted in the anterior chamber of the eye. The exhaust hole 104 can not only be used to discharge the air in the lumen 102, but also facilitate the observation of the surgeon when the dye flows to the exhaust hole 104, so as to grasp the pushing condition of the dye in the ring body and avoid dye contamination caused by excessive pushing of the dye. Preferably, the aperture of the exhaust hole 104 is smaller than the aperture of the hole 120, so as to better ensure the liquid discharge effect of the dye in the liquid outlet structure.

[0041] At the same time, the end surface of the closed end 101 is set to an arc-shaped structure protruding outward, so that the closed end 101 has a smooth structure, which can reduce the risk of damage to the eye structure by the closed end 101 of the ring body 100 during the operation of delivering the entire ring body 100 into the anterior chamber of the eye.

[0042] In the marker disclosed in this embodiment, the shape of the ring body 100 can be a regular polygon, but is preferably as follows: Figure 1 and Figure 6 The circular shape shown in the figure reduces the risk of the ring body 100 causing damage to the ocular structure during implantation into the anterior chamber of the eye. Figure 1 and Figure 6The inner diameter φ of the ring body 100 is designed to be 4.8 to 5.8 mm; according to the requirements of the corneal incision size, such as Figure 3 and Figure 4 The outer diameter φ of the cross section of the ring body 100 shown is designed to be 1 to 1.5 mm.

[0043] It should be noted that the cross-sectional shape of the ring body 100 can be set to be Figure 3 The circle shown can also be set as Figure 4 The bow shape shown; wherein, the bow shape is preferably used. Compared with the circular design, the surface where the bow chord is located can increase the fitting area between the ring body 100 and the anterior capsule of the lens body, which not only reduces the risk of the ring body 100 moving relative to the anterior capsule of the lens, but also increases the resistance of the dye flowing out of the liquid outlet structure to avoid the problem of the dye flowing out of the liquid outlet structure.

[0044] Preferably, the central angle corresponding to the bow chord is 150±10°. Compared with the semicircular bow structure, this ensures that the plane where the chord is located has a larger fitting area with the anterior capsule of the lens, and that the lumen 102 of the ring body 100 has a larger radial dimension to ensure smooth flow of the dye along the lumen 102.

[0045] In this embodiment, the disclosed marker may also include a hose 200 and a dye injector 300; one end of the hose 200 is connected to the dye injection port 103, and the other end of the hose 200 is connected to the dye injector 300; the hose 200 not only allows the surgeon to conveniently push the dye in the dye injector 300 retained outside into the lumen 102 of the ring body 100 through the hose 200 and the dye injection port 103 after completing the ring body implantation, but also when the ring body 100 needs to be removed after the capsule marking is completed, the surgeon can use flat forceps to clamp one end of the hose 200 adjacent to the ring body 100, which is convenient for the removal of the ring body 100, and can also use the elastic deformation of the hose 200 to avoid the problem that the flat forceps are excessively opened due to the clamped object, resulting in the need to expand the corneal incision or even cause damage to the corneal incision and other locations.

[0046] The hose 200 can be a structural member generally made of silicone material, and the length can be set to 5 to 10 cm. At the same time, the ring body 100 can preferably be a structural member made of PMMA (polymethyl methacrylate) material, which has a certain structural strength compared to the ring body made of silicone material, so as to avoid the silicone ring body being easily deformed during the implantation operation and affecting the roundness standard of the dye mark guide. The dye injector 300 can use an existing needle syringe or other pressurized injection device; the dye can use trypan blue or indocyanine green, etc.

[0047] The above embodiments of the present invention focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0048] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A marker for the anterior capsule of a lens, characterized in that: It comprises a ring body provided with a fracture, wherein the fracture corresponds to a central angle of the ring body of 15-20°, and the ring body is a hollow tubular structure; the tube opening at one end of the ring body located at the fracture is a dye injection port; the side of the ring body used for contacting the anterior capsule of the lens is provided with a liquid outlet structure, and the liquid outlet structure is used for the dye in the ring body to form a colored mark continuously or discontinuously distributed along the same circumference in the anterior capsule of the lens; the tube opening at the other end of the ring body located at the fracture is a closed end, and the closed end is provided with an exhaust hole, which is connected to the tube cavity of the ring body and is located downstream of the liquid outlet structure.

2. The marker for the anterior lens capsule according to claim 1, characterized in that: The liquid outlet structure is a plurality of holes spaced apart along the extension direction of the ring body, and the plurality of holes are located on the same circumference and are respectively connected to the lumen of the ring body; the hole diameter is smaller than the inner diameter of the lumen of the ring body.

3. The marker for the anterior lens capsule according to claim 2, characterized in that: The apertures of the plurality of holes gradually increase from a position close to the dye injection port to a position far away from the dye injection port.

4. The marker for the anterior lens capsule according to claim 1, characterized in that: The liquid outlet structure is a slit arranged along the extension direction of the ring body, and the slit is located on the same circumference and communicated with the lumen of the ring body; the width of the slit is smaller than the inner diameter of the lumen of the ring body.

5. The marker for the anterior lens capsule according to any one of claims 1 to 4, characterized in that: The diameter of the exhaust hole is smaller than the diameter of the lumen.

6. The marker for the anterior lens capsule according to claim 1, characterized in that: The exhaust hole is located at the end surface of the closed end; or, the exhaust hole is located at the other side of the closed end opposite to the liquid outlet structure.

7. The marker for the anterior lens capsule according to any one of claims 1 to 4, characterized in that: The end surface of the closed end is configured to be an arc-shaped structure protruding outward.

8. The marker for the anterior lens capsule according to any one of claims 1 to 4, characterized in that: The shape of the ring body is annular; the cross-section of the ring body is circular, or the cross-section of the ring body is arcuate.

9. The marker for the anterior lens capsule according to any one of claims 1 to 4, characterized in that: The marker also includes a hose and a dye injector; one end of the hose is connected to the dye injection port, and the other end of the hose is connected to the dye injector.

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