Assembled intraocular forceps for taking out intraocular lens

Abstract

The assembled intraocular tweezers comprise an outer cylinder, a lens bin and a lens clamping assembly, the lens bin is fixed to the front end face of the outer cylinder, the front end of the lens bin can be inserted into the cornea, and the lens clamping assembly comprises a wall cylinder slidably connected to the interior of the outer cylinder; a guide sliding seat slidably connected into the outer cylinder is arranged in front of the wall cylinder, a first spring is arranged between the guide sliding seat and the front wall of the outer cylinder, a fixing plate is arranged at the rear end of the interior of the wall cylinder, forceps rods are fixed to the front end of the fixing plate, and the forceps rods penetrate through the guide sliding seat and the front wall of the outer cylinder to extend into the crystal bin. And two elastic forceps heads are arranged at one end, extending into the crystal bin, of the forceps rod. Compared with the prior art, the surgical incision is small (the main incision does not need to be expanded), the anterior chamber operation is less, the intraocular lens is easy to take out, and the corneal endothelium injury is less; the method is also suitable for an intraocular lens falling into a vitreous cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an assembled intraocular forceps for removing an intraocular lens. Background Art

[0002] Cataract refers to a visual impairment disease caused by the reduction of lens transparency or color change, which blocks light from entering the inside of the eye. It is one of the most common blinding eye diseases. Currently, the main treatment methods are cataract lens extraction and intraocular lens implantation surgery. And intraocular lens dislocation is one of the main complications of the surgery. Currently, the common methods for removing an intraocular lens clinically include: 1 Using forceps to fold the intraocular lens and then remove it; 2 Using an iris scissors to cut the optical zone of the intraocular lens and then remove it. However, these operations may cause some problems, including corneal endothelial loss, iris injury, and anterior chamber hemorrhage, etc., and both of the above two methods require expanding the main corneal incision. Summary of the Invention

[0003] 1. Technical problems to be solved: In view of the above technical problems, the present invention provides an assembled intraocular forceps for removing an intraocular lens.

[0004] 2. Technical solutions: An assembled intraocular forceps for removing an intraocular lens, comprising an outer cylinder, a lens chamber, and a lens clamping assembly. The lens chamber is fixed on the front end face of the outer cylinder, and the front end of the lens chamber can be inserted into the cornea. The lens clamping assembly includes a wall cylinder slidably connected inside the outer cylinder. A guiding sliding seat slidably connected inside the outer cylinder is arranged in front of the wall cylinder. A first spring is arranged between the guiding sliding seat and the front wall of the outer cylinder. A fixing plate is arranged at the rear end inside the wall cylinder. A forceps rod is fixed at the front end of the fixing plate. The forceps rod passes through the guiding sliding seat and the front wall of the outer cylinder and extends into the lens chamber. Two elastic forceps heads are arranged at the end of the forceps rod extending into the lens chamber. A pressing handle for driving the two elastic forceps heads to move relatively for clamping is arranged above the wall cylinder. A driving assembly is arranged between the pressing handle and the two elastic forceps heads. A pushing handle is arranged at the bottom of the wall cylinder. A limiting rail is arranged at the top and bottom of the outer cylinder respectively. The pressing handle and the pushing handle are slidably connected in the limiting rails at the top and bottom respectively. Pushing the pushing handle can push the elastic forceps heads out from the front opening of the lens chamber.

[0005] Further, the driving assembly includes a sleeve slidably sleeved outside the forceps rod. When the sleeve moves towards the elastic forceps head side, it can squeeze the two elastic forceps heads to approach each other. The tail end of the sleeve is fixedly connected with a guiding push block. The guiding push block is slidably connected inside the wall cylinder. Second springs are arranged between the guiding push block and the fixing plate behind it and the front wall of the front part of the wall cylinder respectively. A guiding hole slidably connected with the forceps rod is arranged at the center of the guiding push block. The guiding push block is hinged with the pressing handle. The pressing handle extends out through a square hole at the top of the wall cylinder. One end of a supporting rod is hinged with the pressing handle, and the other end of the supporting rod is hinged with the top of the wall cylinder.

[0006] Further, a clamping groove is provided on the front end face of the outer cylinder, and the tail of the crystal bin is fixedly connected to the clamping groove through a snap fastener.

[0007] Further, the crystal bin has a frustum-shaped structure, including a front section, a middle section, and a tail section, where the middle section is a conical cylinder, and both the front section and the tail section are cylindrical cylinders. An inclined bin opening is further provided at the end of the front section.

[0008] Further, the limiting rail is composed of two symmetrically arranged partitions protruding towards the inside of the outer cylinder. The pressing handle and the pushing handle are slidably connected between the two partitions. The guiding sliding seat is restricted between the partition and the front wall of the outer cylinder. The wall cylinder is slidably connected between the four partitions. Groove openings for the pressing handle and the pushing handle to pass through are provided at the top and bottom of the outer cylinder.

[0009] Further, a notch is provided at the tail of the groove opening, and the pressing handle and the pushing handle can slide out from the rear notch.

[0010] Further, the front wall of the wall cylinder has a conical shell structure with through holes, and a corresponding conical groove is provided on the side of the guiding sliding seat facing the wall cylinder.

[0011] Further, an arc-shaped surface is provided behind the pushing handle.

[0012] 3. Beneficial effects: Compared with the prior art, the present invention has a small surgical incision (no need to enlarge the main incision), less anterior chamber operation, simple extraction of intraocular lens, and less corneal endothelial damage; the method is also applicable to the intraocular lens that has fallen into the vitreous cavity. Description of the drawings

[0013] FIG. 1 is a schematic structural diagram of an assembled intraocular forceps for extracting an intraocular lens; FIG. 2 is a schematic diagram of the disassembled structure of an assembled intraocular forceps for extracting an intraocular lens; FIG. 3 is an enlarged schematic structural diagram of the part A in FIG. 2 of an assembled intraocular forceps for extracting an intraocular lens; FIG. 4 is a schematic diagram of the pushing and clamping structure of an assembled intraocular forceps for extracting an intraocular lens; FIG. 5 is a schematic diagram of the pressing handle structure of an assembled intraocular forceps for extracting an intraocular lens; FIG. 6 is an enlarged schematic structural diagram of the part C in FIG. 4 of an assembled intraocular forceps for extracting an intraocular lens.

[0014] In the figure: 101, outer cylinder; 102, card slot; 103, guiding slide; 104, limiting rail; 201, inclined bin opening; 202, middle section; 203, buckle; 301, wall cylinder; 302, guiding push block; 303, push handle; 304, support rod; 305, pressing handle; 306, sleeve; 307, tweezer rod; 308, elastic tweezer head. Specific implementation mode

[0015] The present invention will be specifically described below with reference to the accompanying drawings.

[0016] As shown in the Figure 1 to the Figure 6 , Embodiment: An assembled intraocular tweezer for extracting an intraocular lens includes an outer cylinder 101, a lens cartridge, and a lens clamping assembly. The lens cartridge is fixed on the front end face of the outer cylinder 101. The front end of the lens cartridge can be inserted into the cornea. The lens clamping assembly includes a wall cylinder 301 slidably connected inside the outer cylinder 101. A guiding slide 103 slidably connected inside the outer cylinder 101 is provided in front of the wall cylinder 301. A first spring is provided between the guiding slide 103 and the front wall of the outer cylinder 101. A fixing plate is provided at the rear end inside the wall cylinder 301. A tweezer rod 307 is fixed to the front end of the fixing plate. The tweezer rod 307 passes through the guiding slide 103 and the front wall of the outer cylinder 101 and extends into the lens cartridge. Two elastic tweezer heads 308 are provided at one end of the tweezer rod 307 extending into the lens cartridge. A pressing handle 305 for driving the two elastic tweezer heads 308 to move relatively for clamping is provided above the wall cylinder 301. A driving assembly is provided between the pressing handle 305 and the two elastic tweezer heads 308. A push handle 303 is provided at the bottom of the wall cylinder 301. A limiting rail 104 is provided at the top and bottom of the outer cylinder 101 respectively. The pressing handle 305 and the push handle 303 are respectively slidably connected in the limiting rails 104 at the top and bottom. Pushing the push handle 303 can push the elastic tweezer heads 308 out from the front end opening of the lens cartridge. In this embodiment, the outer diameter of the outer cylinder 101 is 20 mm, the thickness of the guiding slide 103 is 10 mm, the length of the first spring is 10 mm, the outer diameter of the wall cylinder 301 is 10 mm, and the length is 120 mm.

[0017] When using the intraocular forceps of this embodiment, the following grasping method is recommended. Press the pushing handle 303 with the thumb, place the index finger on the pressing handle 305, and hold the outer cylinder 101 with the remaining three fingers. First, insert the front end of the lens cartridge into the cornea through the eye incision to form a channel at the incision. Then, push the pushing handle 303 with the thumb to push the entire lens clamping assembly forward. At this time, the wall cylinder 301 squeezes the guiding sliding seat 103, and the guiding sliding seat 103 compresses the first spring. The two elastic forceps heads 308 are pushed out from the front end opening of the lens cartridge. Press the pressing handle 305 with the index finger to drive the two elastic forceps heads 308 to move relatively to clamp the lens. Keep the clamping action, release the pushing handle 303 pressed by the thumb. The lens clamping assembly rebounds under the action of the first spring. When the elastic forceps heads 308 are retracted into the lens cartridge, release the pressing handle, and the elastic forceps heads 308 release the clamped intraocular lens. The intraocular lens falls into the lens cartridge for collection. At this time, pull out the front end of the lens cartridge from the cornea to complete the removal action of the intraocular lens. This grasping method is only a recommendation, and doctors can change it according to their own operating habits, such as two-handed operation, etc. In addition, since this device needs to maintain this state to drive the two elastic forceps heads 308 to work after pushing the lens clamping assembly, a certain degree of proficiency is required during operation. For the recommended grasping method, it is easier to apply force when the thumb faces forward during grasping, which is convenient for maintaining the state after pushing. And only the index finger is needed to pull up the pressing handle 305. This grasping method is more in line with human mechanics.

[0018] Embodiment 2: The driving assembly includes a sleeve 306 slidably sleeved outside the forceps rod 307. When the sleeve 306 moves towards the elastic forceps head 308 side, it can squeeze the two elastic forceps heads 308 to approach each other. Specifically, since there are inclined surfaces on the sides where the two elastic forceps heads 308 are away from each other, when the inclined surfaces are squeezed by the inner wall of the sleeve 306, it will drive the two elastic forceps heads 308 to approach each other. The tail end of the sleeve 306 is fixedly connected to a guiding push block 302. The guiding push block 302 is slidably connected in the wall cylinder 301. Second springs are provided between the guiding push block 302 and the fixed plate behind it and the front wall of the front wall cylinder 301. A guiding hole slidably connected to the forceps rod 307 is provided at the center of the guiding push block 302. The guiding push block 302 is hinged to the pressing handle 305. The pressing handle 305 extends out through the square hole at the top of the wall cylinder 301. One end of a support rod 304 is hinged to the pressing handle 305, and the other end of the support rod 304 is hinged to the top of the wall cylinder 301. In this embodiment, the outer diameter of the sleeve 306 is 20G, the length of the forceps rod 307 is 110 mm, and the length of the elastic forceps head 308 is 3 mm.

[0019] When the pressing handle 305 is pressed, the pressing handle 305 moves downward, causing the angle between the pressing handle 305 and the support rod 304 to increase. The end of the pressing handle 305 close to the guide push block 302 pushes the guide push block 302 to move toward the front end. The guide push block 302 drives the sleeve 306 to move forward. The inner wall of the opening side of the sleeve 306 squeezes the two elastic tweezers heads 308. The two elastic tweezers heads 308 move relative to each other for clamping. When the pressing handle 305 is released, the pressing handle 305 is reset under the action of the second spring, and the two elastic tweezers heads 308 are separated.

[0020] Embodiment 3: A slot 102 is provided on the front end surface of the outer tube 101, and the tail of the crystal bin is fixedly connected to the slot 102 through a buckle 203. The crystal bin is detachable, convenient for cleaning, and easier to assemble. In this embodiment, the slot 102 is 15 mm thick, and the buckle 203 is 10 mm thick.

[0021] Embodiment 4: The crystal chamber is a cone barrel structure, including a front section, a middle section 202 and a tail section, wherein the middle section 202 is a cone tube, the front section and the tail section are both cylindrical tubes, and the end of the front section is also provided with an oblique chamber opening 201. The front end is thinner than the rear end, and the oblique chamber opening 201 has a needle-like bevel, which is convenient for inserting into the cornea, and the rear end and the middle section are thicker for storing the removed artificial lens. In this embodiment, the outer diameter of the front section is 3mm and the length is 5mm, the length of the middle section 202 is 15mm, and the outer diameter of the rear end is 10mm.

[0022] Embodiment 5: The limiting rail 104 is composed of two symmetrically arranged partitions protruding toward the inside of the outer tube 101, the pressing handle 305 and the pushing handle 303 are slidably connected between the two partitions, the guide slide 103 is limited between the partition and the front wall of the outer tube 101, the wall tube 301 is slidably connected between the four partitions, and the top and bottom of the outer tube 101 are provided with slots for the pressing handle 305 and the pushing handle 303 to pass through. The transverse partition can increase the mechanical strength of the wall tube 301, and can limit the guide slide 103 to prevent it from falling out.

[0023] Preferably, the tail of the notch has a notch, and the pressing handle 305 and the pushing handle 303 can slide out from the rear notch to facilitate taking out the entire crystal clamping assembly.

[0024] Embodiment 6: The front wall of the wall tube 301 is a conical shell structure with a through hole, and a corresponding conical groove is provided on the side of the guide slide 103 facing the wall tube 301. An arc surface is provided at the rear of the push handle 303 to facilitate pressing with the thumb.

[0025] Although the present invention has been disclosed above in its preferred embodiments, they are not intended to limit the present invention. Any person skilled in this art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the protection scope of the claims of this application.

Claims

1. An assembled intraocular forceps for extracting an intraocular lens, characterized in that, It includes an outer cylinder, a crystal chamber, and a crystal clamping assembly. The crystal chamber is fixed on the front end face of the outer cylinder. The front end of the crystal chamber can be inserted into the cornea. The crystal clamping assembly includes a wall cylinder slidably connected inside the outer cylinder. In front of the wall cylinder, there is a guiding slider slidably connected inside the outer cylinder. A first spring is provided between the guiding slider and the front wall of the outer cylinder. At the rear end inside the wall cylinder, there is a fixing plate. A pair of forceps rods is fixed to the front end of the fixing plate. The forceps rods pass through the guiding slider and the front wall of the outer cylinder and extend into the crystal chamber. At the end of the forceps rods extending into the crystal chamber, there are two elastic forceps heads. Above the wall cylinder, there is a pressing handle for driving the two elastic forceps heads to move relatively for clamping. A driving assembly is provided between the pressing handle and the two elastic forceps heads. At the bottom of the wall cylinder, there is a pushing handle. On the top and bottom of the outer cylinder, there is a limiting rail respectively. The pressing handle and the pushing handle are slidably connected inside the limiting rails at the top and bottom respectively. Pushing the pushing handle can push the elastic forceps heads out from the front end opening of the crystal chamber.

2. The assembled intraocular forceps for removing an intraocular lens according to claim 1, characterized in that, The driving assembly includes a sleeve slidably sleeved outside the forceps rods. When the sleeve moves towards the side of the elastic forceps heads, it can squeeze the two elastic forceps heads to approach each other. The tail end of the sleeve is fixedly connected to a guiding push block. The guiding push block is slidably connected inside the wall cylinder. Second springs are provided between the guiding push block and the fixing plate behind it and the front wall of the front part of the wall cylinder respectively. A guiding hole slidably connected to the forceps rods is provided at the center of the guiding push block. The guiding push block is hinged to the pressing handle. The pressing handle extends out through the square hole at the top of the wall cylinder. One end of a supporting rod is hinged to the pressing handle, and the other end of the supporting rod is hinged to the top of the wall cylinder.

3. The assembled intraocular forceps for removing an intraocular lens according to claim 1, wherein, A clamping groove is provided on the front end face of the outer cylinder. The tail of the crystal chamber is fixedly connected to the clamping groove through a buckle.

4. An assembled intraocular forceps for removing an intraocular lens according to any one of claims 1-3, characterized in that, The crystal chamber has a conical barrel-like structure, including a front section, a middle section, and a tail section. The middle section is a conical cylinder, and both the front section and the tail section are cylindrical cylinders. An inclined storage opening is also provided at the end of the front section.

5. The assembled intraocular forceps for removing an intraocular lens according to claim 4, characterized in that, The limiting rail is composed of two symmetrically arranged partitions protruding towards the inside of the outer cylinder. The pressing handle and the pushing handle are slidably connected between the two partitions. The guiding slider is restricted between the partition and the front wall of the outer cylinder. The wall cylinder is slidably connected between the four partitions. Grooves for the pressing handle and the pushing handle to pass through are provided on the top and bottom of the outer cylinder.

6. The assembled intraocular forceps for removing an intraocular lens according to claim 5, characterized in that, A notch is provided at the tail of the groove. The pressing handle and the pushing handle can slide out from the rear notch.

7. The assembled intraocular forceps for removing an intraocular lens according to claim 6, characterized in that, The front wall of the wall cylinder has a conical shell-like structure with through holes. A corresponding conical groove is provided on the side of the guiding slider facing the wall cylinder.

8. The assembled intraocular forceps for intraocular lens extraction according to claim 7, characterized in that, An arc-shaped surface is provided behind the pushing handle.

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