Cataract surgery capsulorhexis device capable of adjusting capsulorhexis diameter

Abstract

The invention relates to the technical field of ophthalmology cataract surgery, and provides a cataract surgery capsulorhexis device capable of adjusting the capsulorhexis diameter, which comprises a capsulorhexis device main body comprising a central fixing needle, a magnetic metal wire, a radius rod and a capsulorhexis knife, the other end is a free end wound on the upper section of the central fixing needle; one end of the radius rod is fixedly connected to the middle section of the center fixing needle; the capsulorhexis knife is connected to the other end of the radius rod, and a knife edge is vertically arranged downwards; the capsulorhexis device body protection sleeve comprises a U-shaped groove with a downward opening and a cylindrical tube, and one end of the U-shaped groove is connected with the cylindrical tube. The fixed lantern ring comprises a central ring and a handle, and the handle is vertically connected with the central ring. The device has the advantages that the ideal 4C standard continuous annular capsulorhexis technology can be conveniently achieved, the diameter of a capsulorhexis opening can be adjusted according to the actual situation, the operation difficulty of the 4C standard continuous annular capsulorhexis technology is lowered, and the cost of implementing the 4C standard continuous annular capsulorhexis technology is lowered.

Description

Technical Field

[0001] The invention relates to the technical field of ophthalmic cataract surgery, in particular to a cataract surgery capsulorhexis with adjustable capsulorhexis diameter. Background Art

[0002] "Phacoemulsification + intraocular lens implantation" is the mainstream surgical method for treating cataracts. A key step in this operation is "anterior capsulotomy". Among them, the continuous curvilinear capsulorhexis (CCC) technique, with its smooth capsule opening, enhances the anti-tension force of the capsular bag. The force generated by the phacoemulsification and intraocular lens implantation in the capsular bag will be evenly distributed along the smooth capsule opening, thereby reducing or even avoiding the radial tearing of the capsular bag. This technology has become the mainstream technical form in the anterior capsulotomy technique. With the introduction of the new concept of refractive cataract surgery, on the basis of 3C, it is also required that the capsulotomy opening is concentric with the center of the pupil, so that the capsulotomy opening is centered, that is, the 4C concept (central continuous curvilinear capsulorhexis). The 4C principle can maximize the guarantee of the intraocular lens (IOL) being fixed in the center, delay the occurrence of post-cataract, prevent micro-oscillation of intraocular tissue, and also contribute to the implantation effect of various high-end intraocular lenses such as multifocal and astigmatism correction.

[0003] Clinically, most continuous circular capsulotomy techniques rely on manual operation by the surgeon using capsulotomy forceps. Achieving the 4C standard requires a lot of practice, and manual operation with capsulotomy forceps may fail for novices. Although femtosecond laser-assisted cataract surgery capsulotomy can achieve the ideal 4C standard, the equipment maintenance cost is high, and the cost to the hospital and patients is high. Femtosecond laser-assisted cataract surgery also requires the use of phacoemulsification equipment. The two devices are not integrated, and the surgical process needs to be performed separately, which also brings extra steps to the patient and the surgeon and prolongs the operation time. Not all patients are suitable for femtosecond laser-assisted cataract surgery capsulotomy.

[0004] Therefore, how to realize a cataract surgery capsulorhexis with adjustable capsulorhexis diameter, realize the ideal 4C standard continuous circular capsulorhexis technique, reduce the operational difficulty of realizing the 4C standard continuous circular capsulorhexis technique, and reduce the cost of implementing the 4C standard continuous circular capsulorhexis technique has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter, comprising:

[0006] The present invention provides a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter, comprising:

[0007] A capsulotomy device body, comprising a central fixing needle, a magnetic wire, a radius rod and a capsulotomy knife; the lower section of the central fixing needle is a pointed tip; one end of the magnetic wire is a fixed end, and is fixedly connected to the upper section of the central fixing needle; the other end is a free end, and is wound around the upper section of the central fixing needle; one end of the radius rod is vertically fixedly connected to the middle section of the central fixing needle, and can be extended and retracted along the axial direction; the capsulotomy knife is connected to the other end of the radius rod, and the blade is arranged vertically downward;

[0008] A capsulotomy tool body protective cover, comprising a U-shaped groove opening downward and a cylindrical tube, one end of the U-shaped groove is vertically connected to the cylindrical tube and the U-shaped groove is in communication with the cylindrical tube, the cylindrical tube can be relatively movably sleeved on the central fixing needle, and when the central fixing needle moves down to a low position, the radius rod and the capsulotomy knife are separated from the U-shaped groove, and when the central fixing needle moves up to a high position, the radius rod and the capsulotomy knife can be completely accommodated in the U-shaped groove;

[0009] A fixing collar comprises a center ring and a handle. The center ring is detachably sleeved on the upper section of the center fixing needle and can rotate relative to the center fixing needle. The handle is vertically connected to the center ring.

[0010] Furthermore, a magnet is provided on the upper section of the central fixing needle, and the free end of the magnetic metal wire is fixed by adsorption of the magnet when it is wound around the upper section of the central fixing needle.

[0011] Furthermore, the upper section of the central fixing needle has a welding point, and the fixed end of the magnetic metal wire is welded to the welding point.

[0012] Furthermore, the outer surface of the U-shaped groove is in a smooth arc shape.

[0013] The advantages of the present invention are:

[0014] The present invention realizes the 4C standard continuous circular capsulorhexis technology by setting a capsulorhexis body, a capsulorhexis body protective cover, and a fixed collar. The capsulorhexis body includes a central fixing pin, a magnetic wire, a retractable radius rod, and a capsulorhexis knife. The capsulorhexis body protective cover includes a U-shaped groove and a cylindrical tube with a downward opening. The fixed collar includes a central ring and a handle. The 4C standard continuous circular capsulorhexis technology realized by the present invention makes the edge of the capsulorhexis opening smooth and complete without radial tearing, avoids radial tearing of the capsulorhexis bag during manual capsulorhexis for beginners of cataract surgery, and maintains the integrity of the capsulorhexis bag to the maximum extent to counteract the asymmetric tension generated during the operation. The retained capsulorhexis bag is not only convenient for the phacoemulsification in the capsulorhexis bag, but also conducive to the implantation and fixation of the posterior chamber intraocular lens (IOL). The centered capsulorhexis opening guarantees the centered fixation of the intraocular lens (IOL) to the maximum extent, delays the occurrence of post-cataract, and can prevent micro-oscillation of intraocular tissue, and also contributes to the implantation effect of various high-end intraocular lenses such as multifocal and astigmatism correction. The present invention can adjust the diameter of the capsulorhexis opening according to the patient's eye condition. At the same time, compared with the traditional manual capsulorhexis method, the capsulorhexis device of the present invention requires a shorter learning time and is safer for patients. Compared with femtosecond laser-assisted cataract surgery, the cost of capsulorhexis is lower, and the operational difficulty of realizing the 4C standard continuous circular capsulorhexis technology is reduced, and the cost of implementing the 4C standard continuous circular capsulorhexis technology is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic structural diagram of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter according to the present invention;

[0017] Figure 2 A schematic diagram of the main structure of a capsulorhexis device for cataract surgery with an adjustable capsulorhexis diameter according to the present invention;

[0018] Figure 3 A schematic diagram of the structure of a capsulorhexis knife of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter according to the present invention;

[0019] Figure 4 It is a schematic diagram of the magnetic wire structure of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter according to the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of a capsulorhexis main body protective cover of a cataract surgery capsulorhexis with adjustable capsulorhexis diameter according to the present invention;

[0021] Figure 6 It is a side view of a capsulorhexis main body protective cover of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter according to the present invention;

[0022] Figure 7It is a schematic diagram of the fixed collar structure of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter according to the present invention;

[0023] Figure 8 It is a schematic diagram of step 2 of a cataract surgery capsulorhexis method with adjustable capsulorhexis diameter according to the present invention;

[0024] Fig. 9 It is a schematic diagram of step 3 of a cataract surgery capsulorhexis method with adjustable capsulorhexis diameter according to the present invention;

[0025] Fig.10 It is a schematic diagram of step 4 of a cataract surgery capsulorhexis method with adjustable capsulorhexis diameter according to the present invention;

[0026] Fig.11 This is a schematic diagram of step 5 of a cataract surgery capsulorhexis method with adjustable capsulorhexis diameter according to the present invention.

[0027] Marking Description:

[0028] 1—capsulotomy device body; 11—center fixing needle; 12—magnetic wire; 121—free end of magnetic wire; 122—magnetic wire welding point; 13—radius rod; 14—capsulotomy knife; 2—capsulotomy device body protective cover; 21—U-shaped groove; 22—cylindrical tube; 3—fixing collar; 31—center ring; 32—handle; 4—corneal limbus contour; 5—capsulotomy opening. DETAILED DESCRIPTION

[0029] The present invention realizes the ideal 4C standard continuous circular capsulorhexis technique by providing a cataract surgery capsulorhexis instrument with adjustable capsulorhexis diameter, so that the edge of the capsule opening is smooth and complete without radial tearing, the capsulorhexis diameter can be selected according to the patient's condition, the capsulorhexis opening 5 is concentric with the pupil center, and the capsulorhexis opening 5 is centered, so the ideal 4C standard continuous circular capsulorhexis technique can be easily realized, the operational difficulty of realizing the 4C standard continuous circular capsulorhexis technique is reduced, and the cost of implementing the 4C standard continuous circular capsulorhexis technique is reduced.

[0030] The technical solution in the embodiment of the present application has the following overall idea: determine the diameter of the capsulotomy opening 5, adjust the radius rod 12 to the required length, drive the radius rod 13 and the capsulotomy knife 14 to descend to the bottom of the capsulotomy body protective cover 2 through the central fixing needle 11, clamp the free end 121 of the magnetic wire on the central fixing needle 11 with microscopic forceps, drive the radius rod 13 and the capsulotomy knife 14, and cut a circular capsulotomy opening 5, so that the edge of the capsulotomy opening 5 is smooth and complete without radial tearing, the capsulotomy opening is concentric with the center of the pupil, and the capsulotomy opening 5 is centered, which can conveniently realize the ideal 4C standard continuous circular capsulotomy technology, reduce the operational difficulty of realizing the 4C standard continuous circular capsulotomy technology, and reduce the cost of implementing the 4C standard continuous circular capsulotomy technology.

[0031] Reference Figures 1 to 7As shown, a preferred embodiment of a cataract surgery capsulorhexis device with adjustable capsulorhexis diameter of the present invention comprises:

[0032] A capsulorhexis body 1 comprises a central fixing needle 11, a magnetic wire 12, a radius rod 13 and a capsulorhexis knife 14; the lower section of the central fixing needle 11 is a sharp tip, and the length of the central fixing needle 11 is 2.5 mm; one end of the magnetic wire 12 is a fixed end, and is fixedly connected to the upper section of the central fixing needle 11, and the other end is a free end 121, and is wound around the upper section of the central fixing needle 11; one end of the radius rod 13 is vertically fixedly connected to the middle section of the central fixing needle 11, and can be axially retracted, and the radius rod 13 is used to adjust the diameter of the opened capsulorhexis opening 5; the capsulorhexis knife 14 is connected to the other end of the radius rod 13, and the blade is arranged vertically downward;

[0033] a capsulorhexis body protective cover 2, the capsulorhexis body protective cover 2 is used to prevent the capsulorhexis body 1 from scratching the intraocular tissue, and comprises a U-shaped groove 21 with an opening downward and a cylindrical tube 22, one end of the U-shaped groove 21 is vertically connected to the cylindrical tube 22 and the U-shaped groove 21 is communicated with the cylindrical tube 22, the cylindrical tube 22 can be relatively movably sleeved on the central fixing needle 11, and when the central fixing needle 11 moves down to a low position, the radius rod 13 and the capsulorhexis knife 14 are separated from the U-shaped groove 21, and when the central fixing needle 11 moves up to a high position, the radius rod 13 and the capsulorhexis knife 14 can be completely accommodated in the U-shaped groove 21;

[0034] A fixing ring 3 includes a center ring 31 and a handle 32. The center ring 31 can be detachably sleeved on the upper section of the center fixing needle 11 and can rotate relative to the center fixing needle 11. The handle 32 is vertically connected to the center ring 31. The fixing ring 3 is used to sleeve the upper section of the center fixing needle 11 during capsulotomy.

[0035] The upper section of the central fixing needle 11 is provided with a magnet, and the free end 121 of the magnetic metal wire is fixed by adsorption of the magnet when it is wound around the upper section of the central fixing needle 11 .

[0036] The upper portion of the central fixing pin 11 has a welding point 122 , and the fixed end of the magnetic metal wire 12 is welded to the welding point 122 .

[0037] The outer surface of the U-shaped groove 21 is in a smooth arc shape.

[0038] In a specific embodiment, the present invention provides a method for using a cataract surgery capsulorhexis with adjustable capsulorhexis diameter, which is used for the cataract surgery capsulorhexis with adjustable capsulorhexis diameter described above, referring to Figures 8 to 11 As shown, the following steps are included:

[0039] Step 1: Adjust the radius rod 13 to a preset length, insert the capsulorhexis body 1 into the capsulorhexis body protective cover 2, make the central fixing needle 11 sleeved in the cylindrical tube 22, and the radius rod 13 and the capsulorhexis knife 14 sleeved in the U-shaped groove 21;

[0040] Step 2: If Figure 8 The corneal limbus contour 4 is shown, the main and side corneal incisions for cataract surgery are made, viscoelastic is injected into the anterior chamber, the upper section of the central fixing needle 11 is held with micro forceps, and the capsulorhexis is delivered into the anterior chamber;

[0041] Step 3: When the tip of the central fixing needle 11 reaches the center of the pupil, one end of the U-shaped groove 21 is clamped at the main corneal incision to fix the capsulorhexis main body protective cover 2 to prevent the capsulorhexis protective cover 2 from moving up and down with the capsulorhexis main body 1. The central fixing needle 11 is vertically inserted into the lens capsule by microtweezers to drive the radius rod 13 and the capsulorhexis knife 14 to descend below the capsulorhexis main body protective cover 2, and the capsulorhexis knife 14 punctures the lens capsule bag;

[0042] Step 4: Extend the fixing ring 3 from the side incision to the center of the pupil and cover the upper section of the central fixing needle 11;

[0043] Step 5: The handle 32 of the fixing ring 3 is clamped at the corneal side incision, and the free end 121 of the magnetic wire is pulled by micro forceps to rotate the central fixing needle 11, and the radius rod 13 and the capsulotomy knife 14 are driven by the central fixing needle 11. The capsulotomy knife 14 cuts a circular capsulotomy opening 5 on the anterior capsule with the central fixing needle 11 as the center of the circle, thereby completing the capsulotomy;

[0044] Step 6: withdraw the fixing ring 3 from the side incision, pick up the central fixing needle 11 with micro forceps, and store the capsulorhexis body 1 into the capsulorhexis protective cover 2;

[0045] Step 7: The capsulorhexis is withdrawn horizontally from the main incision.

[0046] In summary, the advantages of the present invention are:

[0047] The present invention realizes the 4C standard continuous circular capsulorhexis technology by setting a capsulorhexis body, a capsulorhexis body protective cover, and a fixed collar. The capsulorhexis body includes a central fixing pin, a magnetic wire, a radius rod, and a capsulorhexis knife. The capsulorhexis body protective cover includes a U-shaped groove and a cylindrical tube with a downward opening. The fixed collar includes a central ring and a handle. The 4C standard continuous circular capsulorhexis technology realized by the present invention makes the edge of the capsulorhexis opening smooth and complete without radial tearing, avoids radial tearing of the capsulorhexis bag during manual capsulorhexis for beginners of cataract surgery, and maintains the integrity of the capsulorhexis bag to the maximum extent to counteract the asymmetric tension generated during the operation. The retained capsulorhexis bag is not only convenient for phacoemulsification in the capsulorhexis bag, but also conducive to the implantation and fixation of the posterior chamber intraocular lens (IOL). The centered capsulorhexis opening guarantees the centered fixation of the intraocular lens (IOL) to the maximum extent, delays the occurrence of post-cataract, and can prevent micro-oscillation of intraocular tissue, and also contributes to the implantation effect of various high-end intraocular lenses such as multifocal and astigmatism correction. The present invention can adjust the diameter of the capsulorhexis opening according to the patient's eye condition. At the same time, compared with the traditional manual capsulorhexis method, the capsulorhexis device of the present invention requires a shorter learning time and is safer for patients. Compared with femtosecond laser-assisted cataract surgery, the cost of capsulorhexis is lower, and the operational difficulty of realizing the 4C standard continuous circular capsulorhexis technology is reduced, and the cost of implementing the 4C standard continuous circular capsulorhexis technology is reduced.

[0048] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A cataract surgery capsulorhexis device with adjustable capsulorhexis diameter, characterized in that: include: A capsulotomy device body comprises a central fixing needle, a magnetic wire, a radius rod and a capsulotomy knife; the lower section of the central fixing needle is a pointed tip; one end of the magnetic wire is a fixed end and is fixedly connected to the upper section of the central fixing needle, and the other end is a free end and is wound around the upper section of the central fixing needle; one end of the radius rod is vertically fixedly connected to the middle section of the central fixing needle and can be extended and retracted along the axial direction; the capsulotomy knife is connected to the other end of the radius rod and the blade is arranged vertically downward; A capsulotomy tool body protective cover, comprising a U-shaped groove opening downward and a cylindrical tube, one end of the U-shaped groove is vertically connected to the cylindrical tube and the U-shaped groove is in communication with the cylindrical tube, the cylindrical tube can be relatively movably sleeved on the central fixing needle, and when the central fixing needle moves down to a low position, the radius rod and the capsulotomy knife are separated from the U-shaped groove, and when the central fixing needle moves up to a high position, the radius rod and the capsulotomy knife can be completely accommodated in the U-shaped groove; A fixing collar comprises a center ring and a handle. The center ring is detachably sleeved on the upper section of the center fixing needle and can rotate relative to the center fixing needle. The handle is vertically connected to the center ring.

2. A cataract surgery capsulorhexis with adjustable diameter according to claim 1, characterized in that: The upper section of the central fixing needle is provided with a magnet, and the free end of the magnetic metal wire is fixed by adsorption of the magnet when it is wound around the upper section of the central fixing needle.

3. The cataract surgery capsulorhexis with adjustable diameter according to claim 1, characterized in that: The upper section of the central fixing needle has a welding point, and the fixed end of the magnetic metal wire is welded to the welding point.

4. The cataract surgery capsulorhexis with adjustable diameter according to claim 1, characterized in that: The outer surface of the U-shaped groove is in a smooth arc shape.

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