Multipurpose cornea marker for cataract surgery

Abstract

The utility model discloses a multipurpose cornea marker for cataract surgery, relates to the technical field of medical instruments, and provides a multipurpose cornea marker for cataract surgery, which comprises a centering ring, a handle is arranged on the outer side wall of the centering ring, and the handle is arranged on the outer side wall of the centering ring. A group of marking stainless steel wires are further symmetrically arranged on the edge of the lower end of the outer side wall of the centering ring, and the cornea marking device is characterized in that an annular plate is arranged in the centering ring, and a marking structure convenient for marking the cornea is arranged in the annular plate. According to the utility model, the axial position and the main incision position of the Toric intraocular lens can be conveniently marked, the length of the incision is more accurate, an important guarantee is provided for the accuracy of an operation, the use is more convenient, and the stable proceeding of the operation is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, it is a multipurpose corneal marker for cataract operation. BACKGROUND

[0002] At present, there are a large number of cataract patients with corneal astigmatism in ophthalmic clinic, and cataract surgery combined with astigmatism correction type intraocular lens is the most effective treatment method. Before implanting astigmatism correction type intraocular lens in cataract surgery, the patient needs to use corneal marker to determine the position of corneal horizontal axis in the conventional sitting position. However, the corneal markers used in the clinic at present all have the following problems:

[0003] 1. The corneal marker does not have a centering structure, and the accuracy of the marker can only be judged by feeling and experience, so there is an error in the marking.

[0004] 2. It is difficult to determine whether the marker is horizontal when marking the corneal horizontal axis position, and it is not convenient to mark the corneal horizontal position.

[0005] Publication (announcement) No. (CN 215688530 U) a multipurpose corneal marker for cataract surgery, including the centering ring, the outer side wall of the centering ring is provided with handle, the outer side wall lower end edge of the centering ring is also provided with a group of mark stainless steel wire symmetrically;The inner ring of the centering ring is provided with a ring plate, the ring plate is provided with a step pupil, the step pupil is detachably provided with a convex lens, and the center of the convex lens is provided with an opaque black dot. The utility model coats the stainless steel wire with marking liquid, then the patient is in sitting position and the centering ring is close to the eye, the convex lens can be used to enlarge the observation of eyeball, when the black dot covers the center of the eyeball, it proves that the centering has been completed, and the horizontal marking is completed by light pressing the handle. The whole horizontal position marking process is very convenient, which greatly improves the work efficiency of medical staff.

[0006] However, the application can only perform horizontal position marking, and cannot mark the Toric intraocular lens axis position and main incision position. UTILITY MODEL CONTENTS

[0007] In view of the above problems, the utility model aims to provide a multipurpose corneal marker for cataract surgery, which can mark the Toric intraocular lens axis position and main incision position.

[0008] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0009] A multi-purpose corneal marker for cataract surgery comprises a centering ring, the outer wall of which is provided with a handle, and a set of marking stainless steel wires symmetrically arranged at the lower end edge of the outer wall of the centering ring, characterized in that: the inside of the centering ring is provided with a ring plate, and the inside of the ring plate is provided with a marking structure for marking the cornea.

[0010] Further, the marking structure comprises a convex lens sheet arranged in the ring plate and an arc-shaped marker arranged on the convex lens sheet.

[0011] Further, the arc-shaped marker comprises a cross positioning assembly sleeved on the convex lens sheet, and a plurality of pressing strips movably arranged on the ring plate, which are symmetrically arranged on both sides of the cross positioning assembly.

[0012] Further, the edge of the ring plate is provided with a circle of scale lines, and the center position of each pressing strip can coincide with the scale lines.

[0013] Further, the cross positioning assembly comprises two positioning lines in the shape of cross, and the center of the positioning lines is provided with a black positioning point for determining the center position of the pupil.

[0014] Further, each positioning line is in the shape of arc for fitting the shape of eyeball.

[0015] Further, the positioning structure comprises a movable assembly sleeved on the inner wall of the centering ring, and a pressing strip connected with the movable assembly.

[0016] Further, the movable assembly comprises a ring-shaped movable block sleeved on the inner wall of the centering ring, and a push rod fixedly connected above the ring-shaped movable block, and the inner wall of the centering ring is provided with a sliding groove at the position where the pressing strip is flush with the height of the ring-shaped movable block.

[0017] Further, one end of the pressing strip is arranged in the sliding groove and connected with the ring-shaped movable block.

[0018] The utility model discloses the beneficial effect is: compared with the prior art, the improvement of the utility model lies in, through setting up the positioning line to be the cross shape and all setting up the arc shape, makes the positioning line when positioning on the cornea of eyeball, the design of cross shape can quickly aim, the design of arc shape can make the positioning line more fit eyeball, and when accurate positioning, and will not hurt the cornea;

[0019] Through the cooperation of the ring plate, the ring movable block, the pressing strip, the scale line and the push rod, the marking structure can mark the cornea and drive the ring movable block to rotate through the push rod, and then the ring movable block drives the pressing strip to rotate, so that the angle between the pressing strip connected with the ring movable block and another pressing strip is formed, which is convenient for marking the Toric intraocular lens axis position and the main incision position, and makes the incision length more accurate, provides an important guarantee for the accuracy of the operation, is more convenient to use and ensures the stable operation of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the multipurpose corneal marker.

[0021] Figure 2 It is an enlarged view of A part of the multipurpose corneal marker.

[0022] Figure 3 It is an enlarged view of A part in the embodiment 2 of the utility model.

[0023] Figure 4 It is an enlarged view of A part in another form of the embodiment 2 of the utility model.

[0024] Figure 5 It is a structure schematic view of the cross positioning assembly.

[0025] Wherein: 1, handle, 2, level, 3, stainless steel wire, 4, centering ring, 5, ring plate, 6, positioning line, 7, scale line, 8, pressing strip, 9, black positioning point, 10, ring movable block, 11, push rod, 12, convex lens sheet. DETAILED DESCRIPTION

[0026] In order to make those skilled in the art better understand the technical scheme of the utility model, the technical scheme of the utility model is further described below in combination with the drawings and embodiments.

[0027] Cataract is one of the leading causes of blindness worldwide. Its prevalence increases with age, with studies showing that the prevalence of cataract in people aged 55-64 is 3.9%, and the prevalence of cataract in people aged 80 and above is 92.6%. In patients preparing for cataract surgery, some patients have corneal astigmatism that affects postoperative visual quality, such as blurred vision, glare, or ghosting. Among them, about 15%-29% of patients have corneal astigmatism ≥1.5D, and China's cataract epidemiological studies indicate that 32.5%-36.4% of patients have preoperative corneal astigmatism of 0.5-1.0D, and 21.3%-22.4% of patients have preoperative corneal astigmatism of 1.0-1.5D. With patients' expectations for postoperative visual quality becoming higher and higher, more patients hope to correct preoperative refractive errors through cataract surgery. For cataract patients with astigmatism, there are several treatment options, including: corneal maximum refractive power axis setting transparent corneal incision, limbal relaxing incision, full-arc depth-dependent astigmatic keratotomy, contralateral transparent corneal incision, Toric intraocular lens, conductive keratoplasty, and corneal T-shaped incision. Among them, Toric intraocular lens is designed specifically for cataract patients with astigmatism. This lens can be implanted into the eye through a small incision to eliminate or reduce pre-existing corneal astigmatism. Accurate alignment of the astigmatic axis of the Toric intraocular lens is crucial for the visual outcome of cataract patients. A 1° rotation can result in a 3.3% reduction in corrected astigmatism, and if the rotation exceeds 30°, the resulting astigmatism will be higher than the preoperative astigmatism and will cause a change in the astigmatic axis. Therefore, it is necessary to minimize the amount of residual astigmatism after surgery to reduce the degree of dependence on glasses for cataract patients after surgery. Preoperative measurement of the steep axis of corneal astigmatism and marking of the astigmatic axis are related to the accuracy of postoperative correction of corneal astigmatism, especially the preoperative marking of the astigmatic axis, which is difficult to avoid human error. There are many traditional marking methods, such as: slit lamp microscope 1ml syringe needle marking method, Toric intraocular lens marker assisted corneal horizontal meridian marking method, pendulum marking method, bubble marking method, and tonometer marker marking method. Among them, the Toric intraocular lens marker assisted corneal horizontal meridian marking method is commonly used in clinical practice, but it is found that manual marking measurement is easily affected by some subjective factors.

[0028] Therefore, referring to Figures 1-5 , the present application provides a multi-purpose corneal marker for cataract surgery, comprising a centering ring 4, a handle 1 is provided on the outer side wall of the centering ring 4, a set of marking stainless steel wires 3 is symmetrically provided on the lower end edge of the outer side wall of the centering ring 4, a ring plate 5 is provided inside the centering ring 4, and a marking structure for marking the cornea is provided inside the ring plate 5.

[0029] It should be noted that the structure, function and use method of the centering ring 4, the level 2, the handle 1, the stainless steel wire 3, the ring plate 5 and the convex lens sheet 12 in the present application are disclosed in the prior art (CN215688530U). Since the present application does not involve improvement of the above-mentioned structure, the specific content is referred to the prior art, and no more will be described here.

[0030] The marking structure of the present application includes a convex lens sheet 12 arranged inside the ring plate and an arc-shaped marker arranged on the convex lens sheet 12. The convex lens sheet 12 can magnify the eye, making it easier for medical personnel to observe the eye.

[0031] The arc-shaped marker includes a cross positioning assembly arranged on the convex lens sheet 12. Two pressure strips 8 are arranged on the ring plate 5 and symmetrically arranged on both sides of the cross positioning assembly. The two pressure strips 8 are arranged at 180°. One end of each pressure strip 8 is movably connected to the inner wall of the ring plate 5, and the other end is connected to the edge of the convex lens sheet 12. The centers of the two ends of the pressure strip 8 are aligned with the scale line 7 and the cross positioning assembly, respectively.

[0032] It should be noted that the scale line 7 is arranged radially on the edge of the ring plate 5. The center of each pressure strip 8 can coincide with the scale line 7.

[0033] Specifically, the cross positioning assembly includes two cross-shaped positioning lines 6. The center of each positioning line 6 is provided with a black positioning point 9 for determining the center position of the pupil. By using the magnifying effect of the convex lens sheet 12, the position of the black positioning point 9 is observed and adjusted so that the black positioning point 9 is located at the center of the pupil.

[0034] Each positioning line 6 is arc-shaped to fit the shape of the eyeball. It can not only prevent damage to the eyeball, but also better position the cornea in the eyeball. It should be noted that the cornea is located in the front of the eyeball wall, i.e. the front of the eyeball. The cornea is transparent and occupies one-sixth of the area of the eyeball wall, with a thickness of about 1mm and a smooth surface with refractive effect. Embodiment 1

[0035] When using the marking structure of the present application to mark the cornea, mark the stainless steel wire with marking liquid; then let the patient sit in a sitting position, hold the handle 1 horizontally and place the stainless steel wire 3 close to the eye; use the magnifying effect of the convex lens sheet 12 to observe the position of the black positioning point 9 and adjust the position so that the black positioning point 9 is located at the center of the pupil; at this time, by observing the level 2, the horizontal stainless steel wire 3 is lightly pressed against the eyeball, thereby completing the marking of the horizontal position of the cornea.

[0036] Of course, the multi-purpose corneal marker for cataract surgery disclosed in the present embodiment can also be used for marking the lesion site in corneal transplantation surgery. The use method is as follows:

[0037] After the marking liquid is applied to the centering ring 4, the handle 1 is held in hand, and the centering ring 4 is lightly pressed towards the lesion part of the eye, so that the peripheral lesion part to be removed in the operation can be clearly shown, and the irregular corneal transplantation is converted into a regular peripheral corneal transplantation operation.

[0038] Obviously, the multi-purpose corneal marker for cataract operation disclosed in the embodiment has the advantages of simple structure, convenient operation, fast centering, high centering accuracy, and the ability to identify whether the marker is horizontal through the level 2, so as to facilitate marking of the horizontal axis position. Embodiment 2

[0039] The marking structure of the embodiment is the same as that of the embodiment 1, and the only difference is that the ring plate of the embodiment further comprises a positioning structure, which comprises a movable assembly sleeved on the inner wall of the centering ring and a pressing strip 8 connected with the movable assembly.

[0040] The movable assembly comprises a ring-shaped movable block 10 sleeved on the inner wall of the centering ring 4 and a push rod 11 fixedly connected with the upper part of the ring-shaped movable block 10. The inner side wall of the centering ring 4 is flush with the pressing strip 8, and a sliding groove is formed in the position. One end of the pressing strip 8 is sleeved in the sliding groove and connected with the ring-shaped movable block 10, and the other end of the pressing strip 8 points to the convex lens 12. It should be noted that the pressing strip 8 of the embodiment also comprises two pressing strips, and the difference from the embodiment 1 is that one of the pressing strips 8 is fixedly connected with the ring-shaped movable block 10 through the sliding groove. When in use, the push rod 11 is pushed to drive the ring-shaped movable block 10 to rotate, and then the ring-shaped movable block 10 drives the pressing strip 8 connected therewith to rotate. When the pressing strip 8 is rotated to the required position, the push rod 11 is stopped. Since the ring-shaped movable block 10 and the inner wall of the centering ring 4 are in friction, the ring-shaped movable block 10 and the centering ring 4 will remain relatively static without external force. Therefore, when the push rod 11 drives the pressing strip 8 to rotate, an included angle as shown in the drawing will be formed between the other pressing strip 8 and the pressing strip 8, and the other pressing strip 8 will be positioned and marked through the scale line 7 corresponding to the pressing strip 8. In this way, the axis position of the Toric intraocular lens and the main incision position are marked, and the incision length is more accurate, which provides an important guarantee for the accuracy of the operation and ensures the stable operation. Figure 3 and Figure 4 As shown in the drawings, the axis position of the Toric intraocular lens and the main incision position are marked, and the incision length is more accurate, which provides an important guarantee for the accuracy of the operation and ensures the stable operation.

[0041] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-purpose corneal marker for cataract surgery, comprising a centration ring (4), the outer side wall of the centration ring (4) is provided with a handle (1), and the outer side wall of the centration ring (4) is also symmetrically provided with a set of marking stainless steel wires (3) at the lower end edge, characterized in that: The centering ring (4) is internally provided with a ring plate (5), the ring plate (5) is internally provided with a marking structure for marking cornea, and a positioning structure connected with the marking structure.

2. A multi-purpose corneal marker for cataract surgery according to claim 1, characterized in that: The marking structure comprises a convex lens sheet (12) arranged in the ring plate (5) and an arc-shaped marker arranged on the convex lens sheet (12).

3. A multi-purpose corneal marker for cataract surgery according to claim 2, wherein: The arc-shaped marker comprises a cross positioning assembly sleeved on the convex lens sheet (12), and a plurality of pressing strips (8) movably arranged on the ring plate (5), the plurality of pressing strips (8) are symmetrically arranged on two sides of the cross positioning assembly.

4. A multi-purpose corneal marker for cataract surgery according to claim 3, wherein: An edge of the ring plate (5) is provided with a circle of scale lines (7), and the center position of each pressing strip (8) can coincide with the scale lines (7).

5. A multi-purpose corneal marker for cataract surgery according to claim 4, wherein: The cross positioning assembly comprises two cross-shaped positioning lines (6), and the center of the positioning line (6) is provided with a black positioning point (9) for determining the center position of the pupil.

6. A multi-purpose corneal marker for cataract surgery according to claim 5, wherein: Each positioning line (6) is arc-shaped for fitting the shape of eyeball.

7. A multi-purpose corneal marker for cataract surgery according to claim 1, wherein: The positioning structure comprises a movable assembly sleeved on the inner wall of the centering ring, and a pressing strip (8) connected with the movable assembly.

8. A multi-purpose corneal marker for cataract surgery according to claim 7, characterized in that: The movable assembly comprises a ring-shaped movable block (10) sleeved on the inner wall of the centering ring, and a push rod (11) fixedly connected above the ring-shaped movable block (10), and the inner side wall of the centering ring (4) is provided with a sliding groove at a position where the height of the pressing strip (8) is flush.

9. A multi-purpose corneal marker for cataract surgery according to claim 8, characterized in that: One end of the pressing strip (8) is arranged in the sliding groove and connected with the ring-shaped movable block (10).

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