Ophthalmic surgical instrument for posterior detachment of vitreous body

Abstract

The utility model provides an ophthalmic surgical instrument for posterior detachment of a vitreous body, and relates to the technical field of medical instruments. The ophthalmic surgical instrument comprises an injection needle cylinder and a liquid supply pipe connected with the outlet end of the injection needle cylinder, and the end, away from the injection needle cylinder, of the liquid supply pipe is communicated with an injection needle with a silica gel soft head; a slidable piston is arranged in the injection needle cylinder, and the piston rod is detachably connected with the piston. The device is simple in structure, can be manufactured by existing medical common instruments, and can be reused, so that the cost of ophthalmologic operations is reduced; the silicone oil injection device can be connected with a silicone oil injection pipeline of the vitreous cutter for flow control and automatic injection, is stable in operation, saves manpower, and can reduce disturbance to retina tissues caused by unbalanced manual injection liquid flow.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an ophthalmic surgical instrument for posterior vitreous detachment. Background Technology

[0002] A crucial step in vitrectomy is posterior vitreous detachment, which involves separating the posterior vitreous cortex from its tight adhesion to the retina. Only by achieving complete posterior vitreous detachment can the vitreous be effectively removed, vitreoretinal adhesions released, and postoperative complications such as vitreoretinal proliferation reduced. This improves surgical success rates and efficacy, alleviates the patient's surgical burden, and shortens the recovery period. However, complete posterior vitreous detachment demands a high level of experience and skill from the surgeon. Conventional surgical methods often fail to achieve this goal effectively, especially in children with complex vitreous conditions such as uveitis or severe vitreous adhesions. In these cases, it is often impossible to find the gap between the posterior vitreous cortex and the retina during vitrectomy, making complete posterior vitreous detachment impossible and significantly impacting the surgical outcome.

[0003] However, by inserting a needle between the vitreous body and the retina and injecting sterile water, separation can be created at the interface between the posterior vitreous cortex and the retina, thus achieving posterior vitreous detachment. This technique previously required a disposable subretinal injection needle to enter the space between the posterior vitreous cortex and the retina. These needles were expensive, typically costing 2,000-5,000 yuan. Furthermore, this method required manual injection by a surgical assistant, which resulted in inconsistent injection speeds that could easily damage the retina. Additionally, the needle obstructed the surgeon's surgical field. This complex procedure, coupled with the inability to reuse the needle, led to a surge in the cost of this superior technique, increased difficulty in its widespread adoption, and losses for patients. Utility Model Content

[0004] The purpose of this invention is to provide an ophthalmic surgical instrument for posterior vitreous detachment. It has a simple structure, can be made from existing medical instruments, and can be reused, thus reducing the cost of ophthalmic surgery. It can be connected to the silicone oil injection tube of a vitrectomy machine for flow control and automatic injection, ensuring stable operation, saving manpower, and reducing disturbance to retinal tissue caused by unbalanced fluid flow during manual injection.

[0005] The technical solution adopted in this utility model is as follows:

[0006] This application provides an ophthalmic surgical instrument for posterior vitreous detachment, including an injection syringe and a supply tube connected to the outlet end of the injection syringe. The end of the supply tube away from the injection syringe is connected to an injection needle. A piston is slidably disposed inside the injection syringe, and a piston rod is also included. The piston rod is detachably connected to the piston.

[0007] Furthermore, in some embodiments of this utility model, a handle is fixedly sleeved on the outer wall of the liquid supply tube, and the injection needle is disposed on the handle.

[0008] Furthermore, in some embodiments of this utility model, the outer wall of the handle is provided with anti-slip protrusions.

[0009] Furthermore, in some embodiments of this utility model, the liquid supply pipe is connected to a liquid filling pipe.

[0010] Furthermore, in some embodiments of this utility model, both the liquid filling pipe and the liquid supply pipe are equipped with clamps.

[0011] Furthermore, in some embodiments of this utility model, a snap-fit ​​rod is provided at one end of the piston rod near the piston, the axial direction of the snap-fit ​​rod is perpendicular to the axial direction of the piston rod, and the length of the snap-fit ​​rod is greater than the width of the piston rod; the piston is provided with a receiving groove, and two snap-fit ​​grooves communicating with the receiving groove are provided opposite to the piston, the snap-fit ​​grooves are L-shaped; the snap-fit ​​rod is embedded in the receiving groove, and both ends of the snap-fit ​​rod are respectively embedded in the snap-fit ​​groove.

[0012] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0013] This invention provides an ophthalmic surgical instrument for posterior vitreous detachment, comprising an injection syringe and a supply tube connected to the outlet end of the injection syringe. An injection needle is connected to the end of the supply tube furthest from the injection syringe. A piston is slidably disposed within the injection syringe, and a piston rod is also included, with the piston rod detachably connected to the piston. Its structure is simple, can be manufactured using existing medical instruments, and is reusable, reducing the cost of ophthalmic surgery. It can be connected to the silicone oil injection line of a vitrectomy machine for flow control and automatic injection, ensuring stable operation, saving manpower, and reducing disturbance to retinal tissue caused by unbalanced manual injection flow. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A front view of the ophthalmic surgical instruments provided in an embodiment of this utility model;

[0016] Figure 2 A cross-sectional view of the position of the injection syringe provided in an embodiment of this utility model;

[0017] Figure 3 A front view of the piston rod provided in an embodiment of this utility model;

[0018] Figure 4 A schematic diagram of the piston structure provided in an embodiment of this utility model;

[0019] Figure 5 This is a front view of the injection syringe installed after being placed in the silicone oil injection channel, according to an embodiment of the present invention.

[0020] Icons: 1-Injection syringe; 2-Supply tubing; 3-Injection needle; 4-Piston; 5-Piston rod; 6-Handle; 7-Anti-slip protrusions; 8-Adding tubing; 9-Clamping device; 10-Snap-fit ​​rod; 11-Receiving groove; 12-Snap-fit ​​groove; 13-Silicone oil injection tubing. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] Example

[0023] Please refer to Figures 1-5 This embodiment provides an ophthalmic surgical instrument for posterior vitreous detachment, including an injection syringe 1 and a supply tube 2 connected to the outlet end of the injection syringe 1. The end of the supply tube 2 away from the injection syringe 1 is connected to an injection needle 3 with a silicone soft tip, which can prevent damage to the retina. A piston 4 is slidably disposed inside the injection syringe 1, and a piston rod 5 is also included. The piston rod 5 and piston 4 are detachably connected. In this embodiment, the injection syringe 1 can be an existing medical syringe, the supply tube 2 can be a medical silicone flexible tube, and the piston 4 can be a rubber stopper. Furthermore, by setting the piston rod 5 and piston 4 to be detachably connected, it is convenient to remove the piston rod 5 and then install the injection syringe 1 onto the silicone oil injection channel 13 for automatic injection, making operation convenient.

[0024] In some embodiments, a handle 6 is fixedly fitted onto the outer wall of the infusion tube 2, and the injection needle 3 is disposed on the handle 6. The outer wall of the handle 6 has anti-slip protrusions 7. This invention, by providing the handle 6, facilitates the fixation of the injection needle 3 and the infusion tube 2, and allows medical personnel to operate the device by holding the handle 6 during injection, making it more convenient to use. Furthermore, the anti-slip protrusions 7 on the outer wall of the handle 6 provide a non-slip effect when holding the handle 6.

[0025] In actual use, after filling the syringe 1 with sterile saline or other sterile liquid, remove the piston rod 5, as follows: Figure 5As shown, the injection syringe 1 is installed on the silicone oil injection line 13 of the existing vitrectomy machine. The medical staff, holding the handle 6, inserts the injection needle 3 between the vitreous body and the retina, starts the vitrectomy machine, and activates the silicone oil injection program. The silicone oil is pumped into the injection syringe 1 through the silicone oil injection line 13, slowly pushing the piston 4 to slide. The piston 4 then pushes the sterile liquid in the injection syringe 1 to be gradually injected between the vitreous body and the retina, thus completing the ophthalmic surgical procedure. Therefore, the ophthalmic surgical instrument provided in this application has a simple structure and can be manufactured using commonly used medical instruments. For example, the injection syringe 1 uses an existing medical syringe, the liquid supply line 2 uses a medical silicone tube, and the piston 4 uses a rubber stopper. It is also reusable, reducing the cost of ophthalmic surgery. Furthermore, it can be connected to the silicone oil injection line 13 of the vitrectomy machine for flow control and automatic injection, ensuring stable operation, saving manpower, and reducing disturbance to retinal tissue caused by unbalanced manual injection flow.

[0026] like Figures 1-5 As shown, in some embodiments, the supply tube 2 is connected to the filling tube 8. Both the filling tube 8 and the supply tube 2 are equipped with clamps 9. The clamps 9 can be Robert clamps used for clamping infusion tubes in medical settings. This invention, by setting the filling tube 8, allows for easy addition of sterile water to the syringe 1. The supply tube 2 can be clamped by the clamps 9, and the clamps 9 of the filling tube 8 can be opened. The piston rod 5 is then connected to the piston 4, and the sterile water can be drawn from the filling tube 8 into the syringe 1 by pulling the piston rod 5 outwards. After addition is complete, the filling tube 8 is clamped by the clamps 9, and the clamps 9 of the supply tube 2 are opened.

[0027] like Figures 2-4 As shown, in some embodiments, the piston rod 5 is provided with a snap-fit ​​rod 10 at one end near the piston 4. The axial direction of the snap-fit ​​rod 10 is perpendicular to the axial direction of the piston rod 5, and the length of the snap-fit ​​rod 10 is greater than the width of the piston rod 5. The piston 4 is provided with a receiving groove 11, and two snap-fit ​​grooves 12 communicating with the receiving groove 11 are provided opposite to each other. The snap-fit ​​grooves 12 are L-shaped. The snap-fit ​​rod 10 is embedded in the receiving groove 11, and both ends of the snap-fit ​​rod 10 are respectively embedded in the snap-fit ​​grooves 12.

[0028] This invention features a locking rod 10 and locking slots 12. When the piston 4 needs to be pulled, the locking rod 10 is aligned with the two locking slots 12 and inserted into the vertical sections of the two slots 12. Then, the piston rod 5 is rotated so that both ends of the locking rod 10 are respectively inserted into the horizontal ends of the two locking slots 12. At this time, the locking rod 10 is locked and limited by the locking slots 12, making it easy to pull or push the piston 4. When the piston rod 5 needs to be disassembled, it is simply rotated in the opposite direction and then pulled out. The operation is convenient.

[0029] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0030] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. An ophthalmic surgical instrument for posterior vitreous detachment, characterized in that: The device includes an injection syringe and a supply tube connected to the outlet end of the injection syringe, with an injection needle connected to the end of the supply tube away from the injection syringe; a piston is slidably disposed inside the injection syringe, and a piston rod is also included, with the piston rod being detachably connected to the piston.

2. The ophthalmic surgical instrument for posterior vitreous detachment according to claim 1, characterized in that: A handle is fixedly sleeved on the outer wall of the liquid supply tube, and the injection needle is located on the handle.

3. The ophthalmic surgical instrument for posterior vitreous detachment according to claim 2, characterized in that: The outer wall of the handle is provided with anti-slip protrusions.

4. The ophthalmic surgical instrument for posterior vitreous detachment according to claim 1, characterized in that: The supply pipe is connected to the filling pipe.

5. The ophthalmic surgical instrument for posterior vitreous detachment according to claim 4, characterized in that: Both the filling pipe and the supply pipe are equipped with clamps.

6. The ophthalmic surgical instrument for posterior vitreous detachment according to claim 1, characterized in that: The piston rod is provided with a locking rod at one end near the piston, the axial direction of the locking rod is perpendicular to the axial direction of the piston rod, and the length of the locking rod is greater than the width of the piston rod; The piston is provided with a receiving groove, and the piston is provided with two locking grooves communicating with the receiving groove. The locking grooves are L-shaped. The locking rod is embedded in the receiving groove, and the two ends of the locking rod are respectively embedded in the locking grooves.

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