Foreign body taking-out forceps for internal eye surgery

Abstract

A pair of foreign body taking-out tweezers for intraocular surgery belongs to the technical field of medical tools. The telescopic handle comprises a handle, a linkage mechanism is arranged on the handle, a sleeve is fixed at one end of the handle, a claw rod is arranged in the handle, the end, in the handle, of the claw rod is connected with the linkage mechanism, and the claw rod is controlled to stretch out and draw back through the linkage mechanism. One end of the claw rod is hinged to the handle, the other end of the claw rod penetrates out of the end of the handle and penetrates through the sleeve, at least three tweezers heads are hinged to the outer end of the claw rod, one tweezers head is made of magnetic materials, all the tweezers heads jointly form a claw shape, and mesh lines are further connected to the tweezers heads and used for wrapping foreign matter. According to the intraocular foreign body removing tool, magnetic intraocular foreign bodies and non-magnetic intraocular foreign bodies can be removed, the intraocular foreign bodies can be completely wrapped, and damage of surgical operation to ocular tissue is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical tools, and particularly relates to a forceps for removing foreign bodies in intraocular surgery. Background Art

[0002] Eye trauma is the main cause of monocular visual impairment or monocular blindness worldwide. In open eye trauma, the incidence of intraocular foreign body injury is 18%-41%. Clinically, intraocular foreign bodies are classified into two categories: magnetic foreign bodies and non-magnetic foreign bodies according to the nature of the foreign bodies.

[0003] With the development of vitrectomy, the removal of intraocular foreign bodies has entered the minimally invasive era. Existing intraocular foreign body forceps can be inserted into the eye through a puncture channel. The head of the foreign body forceps is a two-claw or three-claw head that can be opened and tightened to clamp the foreign body and pull it out of the eye. However, intraocular foreign bodies are irregular in shape and mostly have a sharp appearance. It is extremely easy to fall off during the process of clamping and pulling out, and it will cause secondary damage to the retina after falling into the eye. At the same time, different items are used for dealing with magnetic foreign bodies and non-magnetic foreign bodies. For magnetic foreign bodies, a magnetic ophthalmic magnet is selected for treatment, and non-magnetic foreign bodies are mostly treated with foreign body forceps. It is impossible to use one instrument to deal with any intraocular foreign body. Summary of the Utility Model

[0004] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a forceps for removing intraocular foreign bodies; the utility model can realize the removal of magnetic intraocular foreign bodies and non-magnetic intraocular foreign bodies, and can complete the removal of intraocular foreign bodies with one tool, completely wrap the intraocular foreign bodies, and reduce the damage of surgical operation to eye tissues.

[0005] To achieve the above object, the utility model adopts the following technical solutions.

[0006] The utility model provides a forceps for removing intraocular foreign bodies, including a handle. It is characterized in that a linkage mechanism is arranged on the handle, a sleeve is fixed at one end of the handle, a claw rod is arranged inside the handle, one end of the claw rod inside the handle is connected with the linkage mechanism, the claw rod is controlled to stretch through the linkage mechanism, the other end of the claw rod passes through the end of the handle to the outside and passes through the sleeve, at least three forceps heads are hinged at the outer end of the claw rod, and one of the forceps heads is made of magnetic material. The forceps heads are hook-shaped, and all the forceps heads together form a claw shape. When the claw rod retracts, the forceps heads can be closed and retracted into the sleeve under the restriction of the sleeve. When the claw rod extends, the forceps heads automatically expand into a claw shape after extending out of the sleeve. A mesh wire is also connected between the forceps heads to wrap the foreign body.

[0007] Further, the linkage mechanism includes two relatively arranged elastic pressing bodies, a driving rod and a spring. The elastic pressing body includes an elastic outer rib and an elastic inner rib. Both the elastic outer rib and the elastic inner rib are arcs extending toward the side of the handle. One end of the elastic outer rib is connected to one end of the elastic inner rib, and the other end of the elastic outer rib is connected to the outer wall of the handle. The elastic inner rib extends into the handle through a long opening on the handle. The driving rod is located inside the handle. A convex ring is provided at one end of the driving rod, and this end is connected to one end of the elastic inner rib inside the handle. The spring is sleeved outside the driving rod. One end of the spring abuts against the convex ring, and the other end of the spring abuts against a convex platform provided inside the handle. The end of the claw rod inside the handle is connected to the end of the driving rod. By simultaneously pressing the two elastic pressing bodies, the driving rod drives the claw rod to retract, causing the forceps head to perform a closing action.

[0008] Further, the mesh wire is a polymerized nanowire.

[0009] Advantages of the present utility model.

[0010] The present utility model can achieve the removal of both magnetic intraocular foreign bodies and non-magnetic intraocular foreign bodies using one tool. Moreover, it completely wraps the intraocular foreign body, effectively preventing the foreign body from falling off, reducing the damage to eye tissues during the surgical operation, reducing the types of surgical instruments, realizing resource integration, and saving expenses. Description of the Drawings

[0011] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the following further details the present utility model in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0012] Figure 1 is the external structural schematic diagram of the present utility model.

[0013] Figure 2 is the present utility model Figure 1 the enlarged structural schematic diagram at A in.

[0014] Figure 3 is the cross-sectional structural schematic diagram of the present utility model in the initial state.

[0015] Reference numerals in the drawings: 1 is the handle, 2 is the sleeve, 3 is the claw rod, 4 is the forceps head, 5 is the driving rod, 6 is the spring, 7 is the elastic outer rib, 8 is the elastic inner rib, 9 is the convex ring, 10 is the convex platform, 11 is the mesh wire. Specific Embodiments

[0016] As shown in the accompanying drawings, this embodiment provides a forceps for removing foreign bodies in intraocular surgery, which includes a handle 1. A linkage mechanism is provided on the handle 1. One end of the handle 1 is fixed with a sleeve 2. A claw rod 3 is arranged inside the handle 1. One end of the claw rod 3 inside the handle 1 is connected to the linkage mechanism, and the claw rod 3 is controlled to expand and contract through the linkage mechanism.

[0017] The other end of the claw rod 3 passes through the end of the handle 1 to the outside and passes through the sleeve 2. At least three forceps heads 4 are hinged to the outer end of the claw rod 3, and one of the forceps heads 4 is made of a magnetic material and can magnetically attract magnetic intraocular foreign bodies to complete the removal of the foreign bodies.

[0018] The forceps heads 4 are hook-shaped, and all the forceps heads 4 together form a claw shape. When the claw rod 3 retracts, the forceps heads 4 can be closed and retracted into the sleeve 2 under the restriction of the sleeve 2. When the claw rod 3 extends, the forceps heads 4 automatically expand into a claw shape after extending out of the sleeve 2. A net-like wire 11 composed of polymer nanowires is also connected between the forceps heads 4 to wrap the foreign bodies.

[0019] The linkage mechanism can use the existing linkage structure of the intraocular foreign body forceps, or it can use the following structure: The linkage mechanism includes two relatively arranged elastic pressing bodies, a driving rod 5 and a spring 6. The elastic pressing body includes an elastic outer rib 7 and an elastic inner rib 8. Both the elastic outer rib 7 and the elastic inner rib 8 are arcs extending towards the side of the handle 1. One end of the elastic outer rib 7 is connected to one end of the elastic inner rib 8. The other end of the elastic outer rib 7 is connected to the outer wall of the handle 1. The elastic inner rib 8 extends into the handle 1 through a long opening on the handle 1. The driving rod 5 is located inside the handle 1. A convex ring 9 is arranged at one end of the driving rod 5 and this end is connected to one end of the elastic inner rib 8 inside the handle 1. The spring 6 is sleeved outside the driving rod 5. One end of the spring 6 abuts against the convex ring 9, and the other end of the spring 6 abuts against a convex platform 10 arranged inside the handle 1. The end of the claw rod 3 inside the handle 1 is connected to the end of the driving rod 5.

[0020] When the elastic pressing body is pressed, the forceps are in the closed state of the forceps heads 4, and when released, it is in the open state of the forceps heads 4. The opening and closing degree of the forceps claws changes with the pressing force.

[0021] Initially, each forceps claw is in an open state and the net-like structure is fully opened. When grasping an intraocular foreign body, the magnetic foreign body enters the forceps claws due to the magnetic attraction of the forceps head 4 made of magnetic material. By pressing two elastic pressing bodies simultaneously with two fingers, the driving rod 5 drives the claw rod 3 to retract, causing the forceps heads 4 to close, and the magnetic foreign body is integrally wrapped by the net-like wire 11. Non-magnetic foreign bodies are directly grabbed by the forceps claws and enter the forceps claws, and are wrapped by the net-like structure. Then, as the forceps leave the eye, the foreign bodies are taken out of the eye. When it is necessary to open the forceps claws, just release the elastic pressing body, and the claw rod 3 and the driving rod 5 will reset due to the action of the spring 6.

[0022] It should be understood that the above specific description of the present utility model is only for explaining the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced to achieve the same technical effect; as long as it meets the usage requirements, it is within the protection scope of the present utility model.

Claims

1. A foreign body removal forceps for intraocular surgery, comprising a handle (1), characterized in that: The handle (1) is provided with a linkage mechanism, a sleeve (2) is fixed at one end of the handle (1), a claw rod (3) is provided inside the handle (1), one end of the claw rod (3) inside the handle (1) is connected to the linkage mechanism, the claw rod (3) is controlled to extend and retract by the linkage mechanism, the other end of the claw rod (3) passes through the end of the handle (1) to the outside and passes through the sleeve (2), the outer end of the claw rod (3) is hinged with at least three tweezers heads (4), and One of the tweezer heads (4) is made of magnetic material, the tweezer head (4) is hook-shaped, and all of the tweezer heads (4) together form a claw shape. When the claw rod (3) retracts, the tweezer head (4) can be closed and retracted into the sleeve (2) through the restriction of the sleeve (2). When the claw rod (3) extends, the tweezer head (4) automatically expands into a claw shape after extending out of the sleeve (2). The tweezer heads (4) are also connected to each other with mesh wires (11) for wrapping foreign matter.

2. The intraocular surgery foreign body removal forceps according to claim 1, characterized in that: The linkage mechanism comprises two elastic pressing bodies arranged opposite to each other, a driving rod (5) and a spring (6); the elastic pressing body comprises an elastic outer rib (7) and an elastic inner rib (8); the elastic outer rib (7) and the elastic inner rib (8) are both arc-shaped and extend laterally to the handle (1); one end of the elastic outer rib (7) is connected to one end of the elastic inner rib (8); the other end of the elastic outer rib (7) is connected to the outer wall of the handle (1); the elastic inner rib (8) extends from a long opening on the handle (1) into the interior of the handle (1); the driving rod (5) is located inside the handle (1); One end of the driving rod (5) is provided with a convex ring (9) and the end is connected to one end of the elastic inner rib (8) in the handle (1); the spring (6) is sleeved on the outside of the driving rod (5); one end of the spring (6) is pressed against the convex ring (9); the other end of the spring (6) is pressed against a boss (10) provided in the handle (1); the end of the claw rod (3) in the handle (1) is connected to the end of the driving rod (5); by pressing the two elastic pressing bodies at the same time, the driving rod (5) drives the claw rod (3) to retract, so that the tweezers head (4) performs a closing action.

3. The intraocular surgery foreign body removal forceps according to claim 1, characterized in that: The mesh wires (11) are polymer nanowires.

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