Improved bag tension section

Abstract

The utility model discloses an improved capsular bag tension section which comprises a main body ring, the whole main body ring is in an arc shape, the span of a main body is 120 degrees, clamping positioning holes are formed in the two ends of the main body ring, the main body ring and the clamping positioning holes are connected in a smooth transition mode, and a sclera fixing hook is arranged on the inner side of the middle of the main body ring. According to the utility model, fixed support can be realized in a small-range area of the capsular bag, permanent support can be realized through sclera suture, a plurality of capsular bag tension sections can be used in the same capsular bag when necessary, and when circumferential support is needed, the capsular bag tension sections can be combined with a capsular bag tension ring for use, so that the use is convenient. According to the utility model, 360-degree expansive force cannot be generated, the device can be used for suspension ligament fracture in a larger range, the stable capsular bag can be used before cataract ultrasonic emulsification, the tension section of the capsular bag can be implanted after a crystalline lens is sucked away, and the device is particularly suitable for children with small capsular bag diameter and incomplete dislocation of crystalline lens or small spherical crystalline lens patients.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an improved pouch tension section. Background Technology

[0002] Currently, cataracts are the leading cause of blindness in my country, accounting for 47% of cases. According to statistics from the Ophthalmology Branch of the Chinese Medical Association, the incidence of cataracts in people aged 60 to 89 in my country is 80%, while the incidence rate in people over 90 years old exceeds 90%. Based on population figures for each age group in 2023, the theoretical number of people with cataracts in my country is as high as 208 million.

[0003] Cataract extraction surgery combined with intraocular lens (IOL) implantation is recognized as the most effective treatment for cataracts. Currently, with the accelerating aging population and increasing demand for medical care in China, the number of cataract patients is rising, leading to a continuous increase in the number of cataract surgeries. As an effective auxiliary tool to improve the safety of cataract surgery, the market demand for capsular bag tension rings continues to grow.

[0004] A capsular tension ring (CTR) is an implant that rests within the lens capsular bag to provide support. After implantation, the CTR expands outwards, opening up the constricted capsular bag. It adheres closely to the capsular membrane, maintaining capsular tension and preventing contraction and deformation. CTRs are suitable for patients with partial lens dislocation and preoperative or intraoperative suspensory ligament abnormalities (ligament rupture or fragility). Besides lens dislocation and ligament abnormalities, CTRs are increasingly used in patients with high myopia and in cases of functional intraocular lens implantation.

[0005] Chinese patent CN201811331217.5 discloses a conventional capsular tension ring, which is made of polymethyl methacrylate through machining. The main ring and the positioning hole form a smooth transition arc with a certain curvature, which avoids stress concentration during implantation and reduces the risk of breakage. Chinese patent CN202110229220.1 discloses a modified capsular tension ring, whose structure includes: a semi-open elastic ring and an elastic loop arranged on the inner side along the arc length of the elastic ring, the elastic loop being curved. This sutureable modified capsular tension ring, by utilizing the bending shape and deformation trend of the elastic loop, automatically lowers the height of the elastic loop according to the external force applied during implantation in the patient's eye, thereby reducing implantation resistance.

[0006] Both conventional and modified capsular tension rings are suitable for cases with circumferential suspensory ligament defects or severe capsular expansion, providing sufficient stability. However, for cases exhibiting only localized suspensory ligament problems, such as ligament rupture / weakness in a specific quadrant (e.g., superior or nasal), circumferential support is unnecessary, and implanting a capsular tension ring may lead to overtreatment and increased surgical trauma. Furthermore, circumferential support with a capsular tension ring may slightly increase the risk of corneal astigmatism. Therefore, there is an urgent need to develop a modified capsular tension ring to address these technical issues.

[0007] In view of the above, this utility model is hereby proposed. Utility Model Content

[0008] The purpose of this invention is to address the risks of asymmetrical capsular contraction due to localized suspensory ligament defects / laxity. It provides an improved capsular tension segment that can achieve fixed support within a small area of ​​the capsular bag. It can be used as a permanent support via scleral sutures. Multiple capsular tension segments can be used within the same capsular bag if necessary. When circumferential support is required, it can also be used in conjunction with a capsular tension ring. The capsular tension segment does not generate 360° expansion force, allowing it to be used for larger areas of suspensory ligament rupture. It can stabilize the capsular bag before phacoemulsification and can also be implanted after lens removal. It is particularly suitable for children with incomplete lens dislocation or small spherical lenses with small capsular diameters, and has broad application prospects, which is conducive to its widespread application.

[0009] To achieve the above objectives, this utility model provides an improved pouch tension section, including a main ring. The main ring is generally arc-shaped with a main span of 120°. Both ends of the main ring are provided with clamping and positioning holes. The main ring and the clamping and positioning holes are smoothly connected. A scleral fixation hook is provided on the inner side of the middle part of the main ring. The front end of the scleral fixation hook is provided with a fixing hole for fixing scleral sutures.

[0010] Preferably, the radius of the main ring is 4-6 mm and the length is 25-40 mm.

[0011] Preferably, the radius of the clamping positioning hole is 0.1-0.2 mm.

[0012] Preferably, the radius of the fixing hole is 0.1-0.2 mm.

[0013] Preferably, the cross-section of the main ring is a regular polygon.

[0014] Preferably, the cross-section of the main ring is rectangular.

[0015] Preferably, the maximum side length of the rectangular cross-section of the main ring is 0.2-0.3 mm.

[0016] Preferably, the main ring and the scleral fixation hook are integrally formed.

[0017] Preferably, a reinforcing rib is provided between the main ring and the scleral fixing hook, and the reinforcing rib has a triangular support structure.

[0018] Preferably, the main ring is a polymethyl methacrylate main ring, and the scleral fixation hook is a polymethyl methacrylate scleral fixation hook.

[0019] The improved pouch tension section provided by this utility model has the following beneficial effects.

[0020] 1. This utility model is equivalent to a segment of the capsular tension ring (CTR) with a scleral fixation hook in the middle for scleral fixation. It does not generate 360° expansion force and can achieve fixed support within a small area of ​​the capsular bag. It can be used as permanent support through scleral sutures. If necessary, multiple capsular tension segments can be used in the same capsular bag. When circumferential support is required, it can also be used in combination with the capsular tension ring.

[0021] 2. This invention can be used for intraoperative support, stabilizing the capsular bag before phacoemulsification in cataract surgery, and removing the capsular bag after the lens is aspirated by phacoemulsification, achieving non-invasive placement within the lens capsular bag. For lens dislocations requiring the implantation of a capsular bag tension segment, the tension segment is typically inserted into the dislocated side of the lens after hydrolysis, and the lens is centered using suture perforations or sutureless traction to facilitate successful phacoemulsification.

[0022] 3. This utility model can be selectively implanted in any weak quadrant, strengthen the local weak area of ​​the capsule, adapt to local lesions, such as correcting capsule displacement caused by local suspensory ligament defects, avoid tilting / eccentricity of the artificial lens, and make the operation more flexible.

[0023] 4. This invention is particularly suitable for children with incomplete lens dislocation or small spherical lenses who have a small capsular diameter. Attached Figure Description

[0024] Figure 1 A planar schematic diagram of an improved pouch tension section provided by this utility model;

[0025] Figure 2 A schematic diagram of the rectangular cross-section of the main ring of an improved bladder tension section provided by this utility model.

[0026] In the picture:

[0027] 1. Main body ring 2. Clamping and positioning hole 3. Scleral fixation hook 4. Fixing hole 5. Reinforcing rib. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments and accompanying drawings to help to understand the content of the present invention.

[0029] like Figure 1 The diagram shown is a plan view of an improved pouch tension section provided by this utility model. This improved pouch tension section includes a main ring 1, which is generally arc-shaped with a span of 120°. Both ends of the main ring 1 are provided with clamping and positioning holes 2, and the main ring 1 and the clamping and positioning holes 2 are smoothly connected. A scleral fixation hook 3 is provided on the inner side of the middle of the main ring 1. The front end of the scleral fixation hook 3 is provided with a fixing hole 4 for fixing scleral sutures. A reinforcing rib 5 is provided between the scleral fixation hook 3 and the main ring 1, and the reinforcing rib 5 has a triangular support structure. The radius of the main ring 1 is 4-6 mm, and the length is 25-40 mm. The radius of the clamping and positioning hole 2 is 0.1-0.2 mm. The radius of the fixing hole 4 is 0.1-0.2 mm. The cross-section of the main ring 1 is a regular polygon. Preferably, the cross-section of the main ring 1 is rectangular. Figure 2 The diagram shown is a rectangular cross-sectional view of the main ring of the improved pouch tension section provided by this utility model. The maximum side length of the rectangular cross-section of the main ring 1 is 0.2-0.3 mm. The main ring 1 and the scleral fixation hook 3 are integrally formed. The main ring 1 is a polymethyl methacrylate main ring. The scleral fixation hook 3 is a polymethyl methacrylate scleral fixation hook.

[0030] This invention corresponds to a segment of the capsular bag tension ring (CTR), with a scleral fixation hook 3 in the middle for scleral fixation. It avoids generating 360° expansion force and provides fixed support within a small area of ​​the capsular bag. It can be used as permanent support via scleral sutures. Multiple capsular bag tension segments can be used within the same capsular bag if necessary. When circumferential support is required, it can also be used in conjunction with the capsular bag tension ring. This invention can be used for intraoperative support, stabilizing the capsular bag before phacoemulsification and removing the capsular bag after the lens is aspirated via phacoemulsification, achieving non-invasive placement within the lens capsular bag. For lens dislocation requiring implantation of a capsular bag tension segment, it is generally inserted on the dislocated side after hydrolysis, and the lens is centered using suture perforation or sutureless traction to facilitate smooth phacoemulsification. This invention allows selective implantation in any weak quadrant, strengthening locally weak areas of the capsular bag and adapting to local lesions, such as correcting capsular displacement caused by local suspensory ligament defects, avoiding intraocular lens tilt / eccentricity, and offering greater operational flexibility. This invention is particularly suitable for children with incomplete lens dislocation or small spherical lenses who have a small capsular diameter.

[0031] This article uses specific examples to illustrate the inventive concept in detail. The description of the above embodiments is only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that any obvious modifications, equivalent substitutions or other improvements made by those skilled in the art without departing from the inventive concept should be included within the protection scope of this utility model.

Claims

1. An improved capsular tension segment, characterized by, The utility model discloses a sclera fixation hook, including the main body ring, the main body ring is circular arc shape as a whole, and the main body span is 120 DEG, and both ends of the main body ring are equipped with clamping positioning hole, and the main body ring and clamping positioning hole are connected smoothly, and the inside of the middle part of the main body ring is equipped with a sclera fixation hook, and the front end of the sclera fixation hook is equipped with the fixed hole for fixing the sclera suture.

2. The modified capsular bag tension segment of claim 1, wherein, The radius of the main body ring is 4-6mm, and the length is 25-40mm.

3. The modified capsular bag tension segment of claim 2, wherein, The radius of the clamping positioning hole is 0.1-0.2mm.

4. The modified capsular bag tension segment of claim 3, wherein, The radius of the fixed hole is 0.1-0.2mm.

5. The modified capsular bag tension segment of claim 4, wherein, The cross section of the main body ring is a regular polygon.

6. The modified capsular bag tension segment of claim 4, wherein, The cross section of the main body ring is a rectangle.

7. The modified capsular bag tension segment of claim 6, wherein, The maximum side length of the rectangular cross section of the main body ring is 0.2-0.3mm.

8. The modified capsular bag tension segment of claim 7, wherein, The main body ring and the sclera fixation hook are integrally formed.

9. The modified capsular bag tension segment of claim 8, wherein, The main body ring and the sclera fixation hook are provided with a reinforcing rib, and the reinforcing rib is a triangular support structure.

10. The modified capsular bag tension segment of claim 9, wherein, The main body ring is a polymethyl methacrylate main body ring, and the sclera fixation hook is a polymethyl methacrylate sclera fixation hook.

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