Gel injection needle
By designing a gel injection needle with a position adjustment hook, the problem of multiple incisions of the instrument during ICL implantation is solved, and the effect of reducing corneal damage and improving surgical efficiency is achieved.
Patent Information
- Application Number
- CN202421815670.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During ICL implantation, the device enters and exits the inside of the eye through the incision many times, resulting in a high risk of corneal endothelial injury and low surgical efficiency.
A gel injection needle is designed, including a needle holder, handle, needle stalk and position adjustment hook. The position adjustment hook is located on the needle stalk, allowing the ICL position to be adjusted without taking out the needle stalk after the gel is injected, reducing the number of times the instrument is in and out.
It reduces the risk of corneal endothelial injury, improves the efficiency and safety of the surgery, increases the stability of the anterior chamber, and reduces the risk of infection.
Smart Images
Figure CN223081836U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of medical devices, and particularly to a gel injection needle. Background Art
[0002] The gel injection needle is a commonly used medical device in ICL (Implantable Collamer Lens) implantation surgery. The gel injection needle is connected to a gel syringe and is used to inject gel into the eyeball.
[0003] In a conventional ICL implantation surgery, an incision needs to be made at the corneal limbus, and the ICL is implanted into the interior of the eyeball through the incision. After implanting the ICL, first, a gel injection needle is used to inject gel into the eye through the incision. Then, the gel injection needle is removed, and an ICL positioning hook is used to pass through the incision to adjust the ICL. If the space inside the eyeball is unstable, gel needs to be injected into the eyeball again, and then the ICL positioning hook is used to adjust the ICL again.
[0004] However, this will cause different instruments to pass in and out of the interior of the eyeball through the incision multiple times, which is likely to cause corneal endothelial damage and make the efficiency of ICL implantation surgery relatively low. Utility Model Content
[0005] The present disclosure provides a gel injection needle that can solve the technical problems existing in the related art. The technical solution of the gel injection needle is as follows.
[0006] In a first aspect, the present disclosure provides a gel injection needle. The gel injection needle includes a needle hub, a handle, a needle shaft, and a positioning hook;
[0007] Both ends of the handle are respectively connected to the needle hub and the needle shaft, and the interiors of the needle hub, the handle, and the needle shaft are sequentially communicated;
[0008] One end of the needle hub away from the handle has an external thread structure, and the external thread structure is used for threaded connection with a gel syringe;
[0009] One end of the needle shaft away from the handle is provided with an opening for the gel to flow out;
[0010] The positioning hook is located at one end of the needle shaft away from the handle and is offset from the opening.
[0011] In a possible implementation manner, the handle has a protruding portion and a groove portion, and the groove portion is located between the protruding portion and the needle hub;
[0012] The diameter of the protruding part is greater than that of the groove part, the diameter of the groove part is greater than that of the needle shank, and the diameter of the groove part is 3 mm - 5 mm, and the diameter of the protruding part is 6 mm - 10 mm.
[0013] In a possible implementation, the surface of the protruding part is a matte surface.
[0014] In a possible implementation, the particle size of the surface of the protruding part is 0.08 mm - 0.12 mm.
[0015] In a possible implementation, the needle shank includes a first needle body and a second needle body;
[0016] Both ends of the first needle body are connected to the handle and the second needle body. The axis of the first needle body coincides with the axis of the handle, and the first needle body and the second needle body are arranged in a bent manner;
[0017] The positioning hook is located at one end of the second needle body away from the first needle body, and the positioning hook is located on one side of the second needle body facing the axis of the first needle body.
[0018] In a possible implementation, the second needle body is arc-shaped, and the concave surface of the arc faces the axis of the first needle body, and the convex surface of the arc faces away from the axis of the first needle body.
[0019] In a possible implementation, the included angle at the connection of the first needle body and the second needle body is 120° - 140°.
[0020] In a possible implementation, the radius of the concave surface of the second needle body is 10 mm - 12 mm.
[0021] In a possible implementation, the positioning hook is hemispherical, and the radius of the positioning hook is 0.4 mm - 0.8 mm.
[0022] In a possible implementation, the surface of the positioning hook is a matte surface.
[0023] In a possible implementation, the particle size of the surface of the positioning hook is 0.003 mm - 0.005 mm.
[0024] In a possible implementation, the outer diameter of the external thread structure is 7 mm - 9 mm.
[0025] The technical solution provided by the present disclosure has at least the following beneficial effects:
[0026] The present disclosure provides a gel injection needle. During ICL implantation surgery, after the ICL is implanted through an incision on the eyeball, first the needle shaft is passed through the incision to inject gel into the eyeball. Then, an alignment hook is used to adjust the position of the ICL. Since the alignment hook is located on the needle shaft, after injecting gel into the eyeball, the position of the ICL can be adjusted without removing the needle shaft. Even in the case of an unstable anterior chamber space, there is no need to remove the needle shaft. Just inject gel into the eyeball again and then use the alignment hook to adjust the ICL again. In this way, after implanting the ICL, the needle shaft only needs to enter and exit the eyeball once. Thereby reducing the risk of corneal endothelial damage near the eyeball incision, increasing the stability of the anterior chamber, and reducing the potential infection risk. Moreover, the operation time is reduced and the operation efficiency is improved.
[0027] In addition, when using the gel injection needle provided by the present disclosure, gel can also be supplemented to the eyeball while adjusting the ICL, which is beneficial to improving the stability of the space inside the eyeball and enhancing the safety of the surgery.
[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure. In the drawings:
[0030] Figure 1 is an assembly schematic diagram of a gel syringe and a gel injection needle shown in an embodiment of the present disclosure;
[0031] Figure 2 is a schematic structural diagram of a gel injection needle shown in an embodiment of the present disclosure;
[0032] Figure 3 is a schematic structural diagram of a gel injection needle shown in an embodiment of the present disclosure;
[0033] Figure 4 is a partial structural schematic diagram of a gel injection needle shown in an embodiment of the present disclosure;
[0034] Figure 5 is a partial structural schematic diagram of a gel injection needle shown in an embodiment of the present disclosure.
[0035] LEGEND DESCRIPTION:
[0036] 1. Needle hub, 11. External thread structure;
[0037] 2. Handle, 21. Protruding part, 22. Grooved part;
[0038] 3. Needle stem, 30. Opening, 31. First needle body, 32. Second needle body, 321. Convex surface, 322. Concave surface;
[0039] 4. Position adjustment hook;
[0040] 100. Gel injector;
[0041] 200. Gel injection needle.
[0042] Through the above-mentioned drawings, specific embodiments of the present disclosure have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. Detailed embodiments
[0043] To make the objectives, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the drawings.
[0044] The terms used in the embodiments of the present disclosure are only for explaining the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", "third" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationships may also change accordingly.
[0045] The gel injection needle is a commonly used medical device in ICL (Implantable Collamer Lens) implantation surgery. The gel injection needle is connected to a gel injector and is used to inject gel into the eyeball. The process of a conventional ICL implantation surgery is as follows:
[0046] In the first step, a 3-mm incision is made at the corneal limbus. Among them, the operations in the second step to the seventh step are all achieved through the incision.
[0047] In the second step, an ophthalmic gel is injected into the eyeball using a gel injection needle to protect the intraocular tissues.
[0048] In the third step, the ICL is implanted into the anterior chamber space through a syringe loaded with the ICL.
[0049] In the fourth step, an ophthalmic gel is injected onto the anterior surface of the ICL using a gel injection needle to increase the anterior chamber space.
[0050] In the fifth step, the four haptics of the ICL are dialed into the posterior chamber space using an ICL positioning hook.
[0051] In the sixth step, the ICL is rotated using the positioning hook to adjust it to the target axis position.
[0052] In the seventh step, balanced salt solution is injected into the eye using a flushing needle to displace the ophthalmic gel in the anterior and posterior chambers out of the eye to complete the surgery.
[0053] As can be seen from the above steps, after implanting the ICL, first, a gel injection needle is used to enter the interior of the eyeball through an incision. After injecting the gel, the gel injection needle is removed. Then, the positioning hook is inserted into the interior of the eyeball. After adjusting the ICL to the target position, the positioning hook is removed. In this way, during the process from the fourth step to the sixth step, there are at least two times when the instrument enters and exits the eye. During the surgery, if the anterior chamber space is unstable, the steps from the fourth step to the sixth step need to be repeated. This will cause different instruments to pass through the incision and enter and exit the interior of the eyeball multiple times, resulting in a low efficiency of the ICL implantation. In addition, it is also easy to cause a risk of corneal endothelial damage near the incision of the patient's eyeball.
[0054] In view of the above technical problems, the embodiment of the present disclosure provides a gel injection needle 200, as Figures 1-3 shown, the gel injection needle 200 includes a needle hub 1, a handle 2, a needle shaft 3, and a positioning hook 4. The two ends of the handle 2 are connected to the needle hub 1 and the needle shaft 3, and the interiors of the needle hub 1, the handle 2, and the needle shaft 3 are sequentially communicated. As Figure 5 shown, the side of the needle hub 1 away from the handle 2 has an external thread structure 11, and the external thread structure 11 is used for threaded connection with the gel syringe 100. As Figure 4 shown, an opening 30 is provided at one end of the needle shaft 3 away from the handle 2, and the opening 30 is used for the gel to flow out. The positioning hook 4 is located at one end of the needle shaft 3 away from the handle 2 and is offset from the opening 30.
[0055] Among them, the gel injection needle 200 and the gel syringe 100 are connected before use.
[0056] The technical solution provided by the embodiment of the present disclosure involves a total of seven steps of operation in the ICL implantation.
[0057] First step, make a 3-mm incision at the corneal limbus. Among them, the operations of the second step to the seventh step are all achieved through the small incision.
[0058] Second step, use the gel injection needle 200 to inject ophthalmic gel into the eyeball to protect the intraocular tissues.
[0059] Third step, implant the ICL into the anterior chamber space of the eye through a injector loaded with the ICL.
[0060] Fourth step, use the needle stem 3 of the gel injection needle 200 to inject ophthalmic gel onto the front surface of the ICL to increase the anterior chamber space.
[0061] Fifth step, use the positioning hook 4 of the gel injection needle 200 to move the four haptics of the ICL into the posterior chamber space of the eye.
[0062] Sixth step, use the positioning hook 4 of the gel injection needle 200 to rotate the ICL to adjust it to the target axis position.
[0063] Seventh step, use the irrigation needle to inject balanced salt solution into the eye to displace the ophthalmic gel in the anterior and posterior chambers out of the eye to complete the surgery.
[0064] From the above operations, it can be seen that after implanting the ICL, it is necessary to use the needle stem 3 to extend into the eyeball through the incision. Then, use the positioning hook 4 on the needle stem 3 to adjust the ICL to the target position. In this way, during the process of the fourth step to the sixth step, there is no need to replace the instrument, reducing the number of times the instrument enters and exits the eyeball. During the surgery, if the anterior chamber space is unstable, although it is necessary to repeat the steps of the fourth step to the sixth step, since there is no need to replace the instrument, the needle stem 3 does not need to enter and exit the eyeball multiple times. In this way, the risk of corneal endothelial damage near the incision of the eyeball is reduced, the stability of the anterior chamber is increased, and the potential infection risk is reduced. Moreover, the operation time is reduced to improve the comfort of the patient during the operation and improve the efficiency of the operation.
[0065] It should be noted that if it is necessary to remove the ICL from the patient's eyeball, the gel injection needle provided by this disclosure embodiment can also be used. First, use the needle stem 3 of the gel injection needle to inject ophthalmic gel into the eyeball. Then use the positioning hook 4 on the needle stem 3 to dial out the ICL from the eyeball. Similarly, during the process of removing the ICL, the gel injection needle provided by this disclosure embodiment can also reduce the number of times the instrument enters and exits the eyeball.
[0066] In addition, in addition to being used for injecting gel. The gel injection needle provided by this disclosure embodiment can also be installed in a balanced salt solution injector for injecting balanced salt solution into the eye.
[0067] Next, an exemplary description of the implementation manner of the handle 2 will be given.
[0068] In some examples, such as Figure 2As shown, the handle 2 has a protrusion 21 and a groove portion 22, and the groove portion 22 is located between the protrusion 21 and the needle holder 1. The diameter of the protrusion 21 is greater than that of the groove portion 22, and the diameter of the groove portion 22 is greater than that of the needle stem 3. Since the handle 2 needs to be held by the operator, the diameter of the handle 2 needs to be greater than that of the needle stem 3.
[0069] In some examples, the diameter of the groove portion 22 is 3 mm - 5 mm, and the diameter of the protrusion 21 is 6 mm - 10 mm. During the operation, the operator holds the protrusion 21, and setting the diameter of the protrusion 21 to 6 mm - 10 mm can facilitate the operation of the operator.
[0070] In some examples, the surface of the protrusion 21 is a frosted surface. The frosted surface can increase the friction between the protrusion 21 and the hand of the operator. When the operator holds the protrusion 21, the protrusion 21 is not likely to shift, improving the stability of the needle stem 3 in the eyeball, so that the operator can accurately adjust the ICL. Also, it can prevent the handle from falling off the operator's hand and avoid damaging the gel injection needle.
[0071] Exemplarily, the particle size of the surface of the protrusion 21 is 0.08 mm - 0.12 mm.
[0072] Exemplarily, the protrusion 21 is in the shape of a cuboid. The protrusion 21 has four rectangular side faces, and each side face is a frosted surface. Among them, the area of each side face can be 0.5 cm 2 -1 cm 2 .
[0073] In some other examples, as Figure 3 shown, the handle 2 may not have a groove portion, that is, the diameter of the entire handle 2 is the same everywhere. And a frosted surface can be provided on the entire handle 2.
[0074] Next, an exemplary description of the implementation manner of the needle stem 3 will be given.
[0075] In some examples, as Figure 2 shown, the needle stem 3 includes a first needle body 31 and a second needle body 32. Both ends of the first needle body 31 are connected to the handle 2 and the second needle body 32. The axis of the first needle body 31 coincides with the axis of the handle 2, and the first needle body 31 and the second needle body 32 are arranged in a bent manner. The adjustment hook 4 is located at the end of the second needle body 32 away from the first needle body 31, and the adjustment hook 4 is located on the side of the second needle body 32 facing the axis of the first needle body 31. Among them, the second needle body 32 extends into the eye.
[0076] In some examples, as Figure 2As shown, the second needle body 32 is arc-shaped, and the concave surface 322 of the arc faces the axis of the first needle body 31, and the convex surface 321 of the arc faces away from the axis of the first needle body 31. When the positioning hook 4 adjusts the position of the ICL, the second needle body 32 will move within the patient's eyeball. Setting the second needle body 32 as arc-shaped can make the second needle body 32 fit the shape of the eyeball better, thus facilitating the operation.
[0077] In some examples, such as Figure 2 As shown, the included angle α at the connection between the first needle body 31 and the second needle body 32 is 120° - 140°, thus facilitating the operation of the surgeon.
[0078] If α is too large, it will cause the second needle body 32 to squeeze the incision on the patient's eyeball, resulting in the overflow of aqueous humor or ophthalmic gel from the eyeball. Thus, it reduces the depth stability of the anterior chamber of the eyeball, making it inconvenient for the positioning hook 4 on the second needle body 32 to operate back and forth within the eye, and reducing the safety of the surgery.
[0079] If α is too small, when the operator holds the gel injection needle, the operator's hand or the gel injection needle will block the field of view under the microscope. At the same time, because the cornea itself is relatively small, it is difficult for the operator to observe the cornea after the field of view of the microscope is blocked, thus reducing the safety of the surgery.
[0080] In some examples, such as Figure 2 As shown, the radius R of the concave surface of the second needle body 32 is 10 mm - 12 mm. In this way, it can make the second needle body 32 fit the shape of the eyeball better, facilitating the movement of the second needle body 32 within the eyeball and making the surgery have higher safety. If R is too large, it will cause the second needle body 32 to be close to a straight shape, thus increasing the risk of contact between the second needle body 32 and the patient's own lens in the eye. If R is too small, it will cause the arc of the second needle body 32 to be too large, thus increasing the risk of contact between the second needle body 32 and the patient's corneal endothelium. Therefore, whether the concave surface radius R of the second needle body 32 is too large or too small will reduce the safety of the surgery.
[0081] Exemplarily, the length of the second needle body 32 is 8 mm - 12 mm.
[0082] In some examples, the opening 30 of the second needle body 32 is blunt round, and the specification is 19G - 22G. Among them, the larger the specification of the second needle body 32, the thinner the second needle body 32. If the second needle body 32 is too thin, it will be difficult for the second needle body 32 to inject the gel. If the second needle body 32 is too thick, it is not conducive to maintaining the stability of the anterior chamber of the eyeball, and will further reduce the safety of the surgery.
[0083] In some examples, such as Figure 4As shown, the positioning hook 4 is hemispherical, and the radius of the positioning hook 4 is 0.4 mm - 0.8 mm. In this way, when the second needle body 32 passes through the incision on the eyeball, the positioning hook 4 can smoothly enter the interior of the eyeball.
[0084] In some examples, the surface of the positioning hook 4 is a frosted surface. In this way, the friction between the positioning hook 4 and the ICL can be enhanced, so that the positioning hook 4 can drive the ICL to move, and thus the ICL can be adjusted to the target axis position.
[0085] Exemplarily, the particle size of the particles on the surface of the positioning hook 4 is 0.003 mm - 0.005 mm.
[0086] In some examples, the outer diameter of the external thread structure 11 is 7 mm - 9 mm, so as to facilitate the connection between the gel injection needle and the gel injector 100.
[0087] Exemplarily, the inner diameter of the needle seat 1 is 3 mm - 5 mm, so that the gel can smoothly enter the interior of the needle seat 1.
[0088] In some examples, the overall length of the gel injection needle is 3 cm - 4 cm. The overall length of the gel injection needle is relatively short. When injecting the gel into the eyeball, the flow path of the gel is short, so the resistance suffered is small, and thus the gel can be quickly injected into the interior of the eyeball.
[0089] The embodiment of the present disclosure also provides a gel injection assembly 1, as Figure 1 shown, the gel injection assembly includes a syringe 100 and a gel injection needle 200.
[0090] The above are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present disclosure shall be included within the protection scope of the present disclosure.
Claims
1. A gel injection needle, characterized in that, The gel injection needle includes a needle hub (1), a handle (2), a needle shaft (3), and an adjustment hook (4); Both ends of the handle (2) are respectively connected to the needle hub (1) and the needle shaft (3), and the interiors of the needle hub (1), the handle (2), and the needle shaft (3) are sequentially in communication; One end of the needle hub (1) away from the handle (2) has an external thread structure (11), and the external thread structure (11) is used for threaded connection with a gel syringe (100); One end of the needle shaft (3) away from the handle (2) is provided with an opening (30), and the opening (30) is used for the outflow of the gel; The adjustment hook (4) is located at one end of the needle shaft (3) away from the handle (2) and is offset from the opening (30).
2. The gel injection needle according to claim 1, wherein, The handle (2) has a protrusion (21) and a groove (22), and the groove (22) is located between the protrusion (21) and the needle hub (1); The diameter of the protrusion (21) is greater than the diameter of the groove (22), the diameter of the groove (22) is greater than the diameter of the needle shaft (3), and the diameter of the groove (22) is 3 mm - 5 mm, and the diameter of the protrusion (21) is 6 mm - 10 mm.
3. The gel injection needle according to claim 2, wherein The surface of the protrusion (21) is a frosted surface.
4. The gel injection needle according to claim 3, characterized in that, The particle size of the surface of the protrusion (21) is 0.08 mm - 0.12 mm.
5. The gel injection needle according to any one of claims 1-4, characterized in that, The needle shaft (3) includes a first needle body (31) and a second needle body (32); Both ends of the first needle body (31) are connected to the handle (2) and the second needle body (32), the axis of the first needle body (31) coincides with the axis of the handle (2), and the first needle body (31) and the second needle body (32) are arranged in a bent manner; The adjustment hook (4) is located at one end of the second needle body (32) away from the first needle body (31), and the adjustment hook (4) is located on one side of the second needle body (32) facing the axis of the first needle body (31).
6. The gel injection needle according to claim 5, wherein The second needle body (32) is arc-shaped, and the concave surface (322) of the arc faces the axis of the first needle body (31), and the convex surface (321) of the arc faces away from the axis of the first needle body (31).
7. The gel injection needle according to any one of claims 1-4, characterized in that, The adjustment hook (4) is hemispherical, and the radius of the adjustment hook (4) is 0.4 mm - 0.8 mm.
8. The gel injection needle according to any one of claims 1-4, characterized in that, The surface of the adjustment hook (4) is a frosted surface.
9. The gel injection needle according to claim 8, wherein The particle size of the surface of the adjustment hook (4) is 0.003 mm - 0.005 mm.
10. A gel injection assembly, characterized in that, The gel injection assembly includes a syringe (100) and a gel injection needle (200) according to any one of claims 1 - 9.