Bag retractor for cataract surgery

Abstract

The utility model relates to a capsular bag drag hook for cataract surgery, which comprises a drag hook, the drag hook comprises a first pull rod, a second pull rod integrally connected to one end of the first pull rod, a transition part integrally connected to the end, away from the first pull rod, of the second pull rod, and a third pull rod integrally connected to the end, away from the second pull rod, of the transition part. The sliding sleeve is arranged on the first pull rod in a sliding and sleeving manner; and the protection unit is arranged at one end, far away from the transition part, of the third pull rod. Compared with a traditional suture fixing method, the capsular bag structure for the cataract surgery has the advantages that the complexity of the surgery is greatly reduced, a user only needs to hook the capsular bag through the drag hooks and pull the capsular bag to a proper position, then the circular ring on the rear portion is moved to abut against the sclera edge, suture is not needed in the process, operation is simpler, more convenient and safer, and the capsular bag structure is matched with CTR for use, so that the operation cost is reduced. Transverse and longitudinal tension can be provided for the capsular bag of the dislocated crystalline lens, so that the positions of the capsular bag and the IOL are kept stable and can be maintained for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of ophthalmic surgical medical devices, and particularly relates to a capsular hook for cataract surgery. Background Art

[0002] The lens capsule, also known as the lens capsule (lens capsule; crystalline capsule), completely surrounds the lens and is a transparent and elastic basement membrane produced by the secretion of lens epithelium.

[0003] Cataract is a common ophthalmic disease, which is a disease that causes visual impairment due to turbidity in the lens part of the eye for various reasons. Its common types include senile cataract, complicated cataract, traumatic cataract, metabolic cataract, etc., and senile cataract is particularly common. The reasons are diverse, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, etc.

[0004] In cataract surgery, if there is a complication of lens subluxation, the surgical difficulty will increase, and sometimes the surgery is even difficult to perform. The traditional suture fixation method has the disadvantages of complex surgery and more postoperative complications. Content of the Utility Model

[0005] The utility model provides a capsular hook for cataract surgery, which solves the defects of complex surgery and more postoperative complications existing in the traditional suture fixation method in cataract surgery.

[0006] To achieve the above object, the technical solution adopted by the utility model is: a capsular hook for cataract surgery, which comprises:

[0007] A hook, which includes a first pull rod, a second pull rod integrally connected to one end of the first pull rod, a transition part integrally connected to the end of the second pull rod far from the first pull rod, and a third pull rod integrally connected to the end of the transition part far from the second pull rod;

[0008] A sliding sleeve, which is slidably sleeved on the first pull rod;

[0009] A protection unit, which is arranged at one end of the third pull rod far from the transition part.

[0010] Optimally, the sliding sleeve includes a sliding sleeve body, a through groove axially penetrating the sliding sleeve body, and a first sliding groove and a second sliding groove radially penetrating the sliding sleeve body, and the first pull rod passes through the first sliding groove and the second sliding groove.

[0011] Optimally, the first sliding groove and the second sliding groove have the same diameter, and the connection line of the first sliding groove and the second sliding groove passes through the diameter of the sliding sleeve.

[0012] Optimally, the protection unit includes a second hook head integrally connected to one end of the third pull rod, and a first contact surface and a second contact surface obliquely opened on both sides of the second hook head, and the second hook head is oblate.

[0013] Optimally, the protection unit further includes a first mating surface and a second mating surface obliquely opened on both sides of the third pull rod, the first mating surface and the first contact surface are connected and have the same slope, and the second mating surface and the second contact surface are connected and have the same slope.

[0014] Optimally, the protection unit comprises a first hook head integrally connected to one end of the third pull rod, and the first hook head is in the shape of a water drop.

[0015] Optimally, the draw hook is made of a high temperature resistant polymer material, and the sliding sleeve is made of silicone.

[0016] Optimally, the included angle between the first pull rod and the second pull rod is 130°-150°.

[0017] Optimally, the diameter of the sleeve body is 1.6 mm, and the diameter of the through groove is 0.7 mm.

[0018] Optimally, the diameter of the cross section of the hook is 0.2 mm, and the length of the hook is 11 mm.

[0019] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] The utility model of the capsular bag retractor for cataract surgery is composed of a retractor, a sliding sleeve and a protection unit. In actual use, the retractor can pull the capsular bag to connect with the sclera. After pulling to a suitable position, the sliding sleeve on the retractor can be slid to support the scleral edge. The protection unit at the front end of the retractor can prevent the retractor from piercing or tearing the capsular bag when entering or removing it, thereby avoiding secondary injury to the patient.

[0021] Compared with the traditional suture fixation method, the complexity of the operation is greatly reduced. It only needs to hook the capsular bag with a retractor and pull it to the appropriate position, then move the rear sliding sleeve to hold the scleral edge. No sutures are required during the process, and the operation is simpler, more convenient and safer. With the use of CTR, it can provide lateral and longitudinal tension for the capsular bag of the dislocated lens, so that the position of the capsular bag and IOL remains stable and can be maintained for a long time.

[0022] Furthermore, the retractor is made of a high-temperature resistant polymer material and can be repeatedly sterilized at high temperatures and high pressures and then used. It is more cost-effective than a conventional disposable retractor and reduces surgical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1Schematic structural diagram of the first embodiment of the present utility model;

[0024] Figure 2 of the present utility model Figure 1 front view;

[0025] Figure 3 Schematic structural diagram of the sliding sleeve of the present utility model;

[0026] Figure 4 Schematic structural diagram of the protection unit in the first embodiment of the present utility model;

[0027] Figure 5 Schematic structural diagram of the protection unit in the first embodiment of the present utility model from another angle;

[0028] Figure 6 Front view of the second embodiment of the present utility model;

[0029] Explanation of reference numerals:

[0030] 1. Hook; 11. First pull rod; 12. Second pull rod; 13. Arc part; 14. Third pull rod; 15. Transition part;

[0031] 2. Sliding sleeve; 21. Sliding sleeve body; 22. Through groove; 23. First chute; 24. Second chute;

[0032] 3. Protection unit; 31. First hook head; 32. Second hook head; 33. Connecting part; 34. First contact surface; 35. Second contact surface; 36. First mating surface; 37. Second mating surface. Detailed implementation manners

[0033] The present utility model will be further described below in conjunction with the embodiments shown in the drawings.

[0034] Embodiment 1

[0035] As shown in Figure 1 , 2 , the figure shows a schematic structural diagram of a capsular hook for cataract surgery of the present utility model, which includes a hook 1, a sliding sleeve 2 and a protection unit 3. During actual use, the hook 1 can pull the capsule to be connected to the sclera. After pulling to the appropriate position, sliding the sliding sleeve 2 on the hook 1 against the scleral margin can achieve the purpose. The protection unit 3 at the front end of the hook 1 can prevent the hook 1 from piercing or tearing the capsule when entering or removing, avoiding secondary injury to the patient.

[0036] As shown in Figure 2As shown, the retractor 1 includes a first retractor 11, a second retractor 12, an arc portion 13, a third retractor 14 and a transition portion 15. The retractor 1 is an integrally formed structure, and is made of a high temperature resistant polymer material (such as polyimide, polyether ketone, polyamide), and can be repeatedly sterilized at high temperature and high pressure for use, thereby reducing surgical costs.

[0037] The diameter of the cross section of the hook 1 is 0.2 mm, and the total length of the hook 1 is 11 mm.

[0038] The second pull rod 12 is integrally connected to one end of the first pull rod 11, and the included angle with the first pull rod 11 is 130°-150°. In actual use, the capsular bag is connected to the sclera by pulling the hook 1, and the capsular bag is more evenly stressed during pulling. An arc portion 13 is provided at the connection between the second pull rod 12 and the first pull rod 11, and the arc portion 13 is used for smooth transition when pulling the capsular bag, so as to avoid the sharp part of the connection from causing damage to the patient's capsular bag.

[0039] The transition part 15 is integrally connected to one end of the second pull rod 12 away from the first pull rod 11, and the transition part 15 is semi-circular, and the third pull rod 14 is integrally connected to one end of the transition part 15 away from the second pull rod 12. The provision of the transition part 15 makes it easier to pull the pouch.

[0040] The sliding sleeve 2 is sleeved on the first pull rod 11 of the retractor 1 and can slide on the first pull rod 11. When the retractor 1 pulls the capsular bag to a suitable position, the sliding sleeve 2 on the retractor 1 is slid to support the scleral edge. Figure 3 , which is a schematic diagram of the structure of the sleeve 2, the sleeve 2 comprises a sleeve body 21, a through groove 22, a first slide groove 23 and a second slide groove 24. The sleeve 2 is made of silicone material to support the scleral margin and avoid damage to the scleral margin by using the elasticity of the silicone material.

[0041] The sleeve body 21 is in the shape of a thin cylindrical sheet, and the through groove 22 penetrates the sleeve body 21 and is coaxially arranged with the sleeve body 21. The through groove 22 is used to reduce the weight of the sleeve body 21. The diameter of the sleeve body 21 is 1.6 mm, and the diameter of the through groove 22 is 0.7 mm. The first slide groove 23 and the second slide groove 24 penetrate the sleeve body 21 along the radial direction of the sleeve body 21, and the diameters of the first slide groove 23 and the second slide groove 24 are the same. The first pull rod 11 of the retractor 1 is penetrated by the first slide groove 23 and the second slide groove 24, and the sleeve body 21 can slide along the length direction of the first pull rod 11 to support the scleral edge.

[0042] like Figure 3 As shown, the connecting line of the first sleeve 2 and the second sleeve 2 passes through the diameter of the sleeve body 21, thereby increasing the contact area between the sleeve body 21 and the first pull rod 11, thereby increasing the friction between the two. After the sleeve body 21 slides, the sleeve body 21 is prevented from shifting and affecting the position of the capsular bag and the sclera.

[0043] The first pull rod 11 passes through the sliding sleeve body 21 and is parallel to the radial direction of the sliding sleeve body 21. When the sliding sleeve body 21 slides, it is parallel to the length direction of the first pull rod 11 and will not tilt or swing by itself, avoiding affecting the abutment against the sclera.

[0044] The protection unit 3 is arranged at one end of the third pull rod 14 away from the transition part 15, preventing the hook 1 from piercing or tearing the capsular bag when entering or taking out, and avoiding secondary injury to the patient, such as Figure 4 、 5 As shown, the protection unit 3 includes a second hook head 32, a connecting part 33, a first contact surface 34, a second contact surface 35, a first mating surface 36 and a second mating surface 37. The second hook head 32 is integrally connected to one end of the third pull rod 14 away from the transition part 15. In this embodiment, the second hook head 32 has an oblate structure, which is used to protect the peripheral capsular membrane from being torn and increase the capsular membrane area supported by the hook 1.

[0045] An arc-shaped connecting part 33 is arranged at the connection between the second hook head 32 and the third pull rod 14. As shown in Figure 4 、 5 As shown, during entry and removal, it relies on the arc-shaped connecting part 33 for smooth transition, avoiding damage to the patient's capsular bag part by the sharp part at the connection.

[0046] As shown in Figure 4 、 5 As shown, the width of the oblate second hook head 32 is greater than the diameter of the third pull rod 14. Therefore, after the capsular bag is pulled to the appropriate position, under the clamping action of the second hook head 32, the capsular bag is not easy to slip out from the third pull rod 14, avoiding the hook 1 from slipping off.

[0047] The first contact surface 34 and the second contact surface 35 are inclinedly arranged on both sides of the second hook head 32, and the distance between the first contact surface 34 and the second contact surface 35 on the side close to the third pull rod 14 is greater than the distance on the side far from the third pull rod 14, facilitating the entry or removal of the hook 1.

[0048] The first mating surface 36 and the second mating surface 37 are inclinedly arranged on both sides of the third pull rod 14. The first mating surface 36 is connected to the first contact surface 34 and they have the same slope; the second mating surface 37 is connected to the second contact surface 35 and they have the same slope. Therefore, the plane between the first mating surface 36 and the first contact surface 34 is smoothly connected, and the plane between the second mating surface 37 and the second contact surface 35 is smoothly connected. When pulling the capsular bag, it is smoother and more convenient, and will not tear the structural tissue at the capsular bag.

[0049] Embodiment 2

[0050] The technical solution in the second embodiment is basically the same as that in the first embodiment, and the only difference is the structure of the protection unit 3. Figure 6 As shown, the protection unit 3 in this embodiment is a first hook head 31 integrally connected to the end of the third pull rod 14 away from the transition portion 15 .

[0051] In this embodiment, the first retractor head 31 is in the shape of a teardrop, which can also prevent the retractor 1 from piercing or tearing the bag when entering or removing the bag, thereby avoiding secondary injury to the patient.

[0052] The capsular bag retractor for cataract surgery of the utility model is composed of a retractor 1, a sliding sleeve 2 and a protection unit 3. In actual use, the retractor 1 can pull the capsular bag to connect with the sclera. After pulling to a suitable position, the sliding sleeve 2 on the sliding retractor 1 can be pressed against the scleral edge. The protection unit 3 at the front end of the retractor 1 can prevent the retractor 1 from piercing or tearing the capsular bag when entering or removing it, thereby avoiding secondary injury to the patient;

[0053] Compared with the traditional suture fixation method, the complexity of the operation is greatly reduced. It is only necessary to hook the capsular bag with the retractor 1 and pull it to the appropriate position, and then move the rear sliding sleeve 2 to press against the scleral edge. The operation is simpler, more convenient and safer. The patient's condition was tracked 1 day, 7 weeks and 6 months after the operation. The capsulorhexis opening was elliptical under the traction of the capsular bag retractor 1, while the IOL always remained in the central position, indicating that the capsular bag retractor 1 can continuously provide sufficient and stable traction.

[0054] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A capsular bag retractor for cataract surgery, characterized in that: It includes: A hook (1), the hook (1) comprising a first pull rod (11), a second pull rod (12) integrally connected to one end of the first pull rod (11), a transition portion (15) integrally connected to one end of the second pull rod (12) away from the first pull rod (11), and a third pull rod (14) integrally connected to one end of the transition portion (15) away from the second pull rod (12); A sliding sleeve (2), wherein the sliding sleeve (2) is slidably mounted on the first pull rod (11); A protection unit (3) is arranged at an end of the third pull rod (14) away from the transition portion (15).

2. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The sliding sleeve (2) comprises a sliding sleeve body (21), a through groove (22) penetrating the sliding sleeve body (21) in the axial direction, and a first sliding groove (23) and a second sliding groove (24) penetrating the sliding sleeve body (21) in the radial direction, and the first pull rod (11) is provided with the first sliding groove (23) and the second sliding groove (24).

3. The capsular bag retractor for cataract surgery according to claim 2, characterized in that: The first slide groove (23) and the second slide groove (24) have the same diameter, and a line connecting the first slide groove (23) and the second slide groove (24) passes through the diameter of the sliding sleeve (2).

4. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The protection unit (3) comprises a second hook head (32) integrally connected to one end of a third pull rod (14), and a first contact surface (34) and a second contact surface (35) obliquely opened on both sides of the second hook head (32); the second hook head (32) is in an oblate shape.

5. The capsular bag retractor for cataract surgery according to claim 4, characterized in that: The protection unit (3) further comprises a first mating surface (36) and a second mating surface (37) obliquely arranged on both sides of the third pull rod (14); the first mating surface (36) and the first contact surface (34) are connected and have the same slope; the second mating surface (37) and the second contact surface (35) are connected and have the same slope.

6. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The protection unit (3) comprises a first hook head (31) integrally connected to one end of the third pull rod (14), and the first hook head (31) is in the shape of a water drop.

7. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The draw hook (1) is made of a high temperature resistant polymer material, and the sliding sleeve (2) is made of silica gel.

8. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The included angle between the first pull rod (11) and the second pull rod (12) is 130°-150°.

9. The capsular bag retractor for cataract surgery according to claim 2, characterized in that: The diameter of the sliding sleeve body (21) is 1.6 mm, and the diameter of the through groove (22) is 0.7 mm.

10. The capsular bag retractor for cataract surgery according to claim 1, characterized in that: The diameter of the cross section of the hook (1) is 0.2 mm, and the length of the hook (1) is 11 mm.

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