Vertically uniform speed compression rod reduction forceps for pedicle screw

Abstract

This invention relates to the field of medical device technology, and in particular to a vertical uniform-speed depressor forceps for pedicle screw reduction. The vertical uniform-speed depressor forceps for pedicle screw reduction includes a screw holder, a depressor sleeve assembly, and a set screw fastening screwdriver assembly. The screw holder has a protruding end that can grip the pedicle screw. The depressor sleeve assembly includes a threaded sleeve and a sleeve tube. The threaded sleeve is located on one side of the hinged end of the screw holder and is threadedly connected to the sleeve tube. The position of the sleeve tube corresponds to the position of the protruding end of the screw holder, and the sleeve tube can push the rod on the pedicle screw into the "U"-shaped groove of the pedicle screw. The set screw fastening screwdriver assembly includes a set screw and a screwdriver limiting block, the limiting block being adjustablely mounted on the set screw. This invention integrates surgical tools, improves surgical efficiency, and achieves uniform-speed depressor depressor operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a vertical uniform speed pressure rod reduction clamp for pedicle screws. Background Technology

[0002] Pedicle screw fixation is a crucial step in spinal surgery. Its primary function is to restore the alignment of the spine and maintain its stability. For patients with spinal instability or spinal fractures, pedicle screw fixation can reduce spinal position and maintain stability. For patients with scoliosis or kyphosis, it can provide correction. In cases of degenerative spinal diseases, it can maintain spinal stability and promote bone fusion post-surgery.

[0003] During the installation of the pedicle screw fixation system, the rod needs to be pressed into the "U"-shaped groove of the pedicle screw, and then the set wire is screwed into the "U"-shaped groove to fix the rod, which is made of materials such as titanium. Currently, the surgical procedure requires a large number of supporting surgical tools, resulting in low efficiency and difficulty in achieving uniform downward pressure on the rod. Summary of the Invention

[0004] The purpose of this invention is to provide a vertical uniform speed decompression rod reduction forceps for pedicle screws, which overcomes the shortcomings of the aforementioned prior art, integrates surgical tools, improves surgical efficiency, and achieves uniform speed decompression of the rod.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A pedicle screw vertical uniform speed depressor repositioning clamp includes a screw holder, a depressor sleeve assembly, and a set screw fastening screwdriver assembly, wherein:

[0007] The clamping end of the nail holder is protruding outward, and the clamping end of the nail holder can hold the pedicle screw;

[0008] The pressure bar sleeve assembly includes a threaded sleeve and a sleeve tube. The threaded sleeve is located on one side of the hinge end of the nail holder. The threaded sleeve is threadedly connected to the sleeve tube. The position of the sleeve tube corresponds to the position of the protruding clamp end of the nail holder. The sleeve tube can push the bar on the pedicle screw into the "U"-shaped groove of the pedicle screw.

[0009] The set screw fastening screwdriver assembly includes a set screw screwdriver and a screwdriver limiting block. The screwdriver limiting block is installed on the set screw screwdriver in an adjustable position. During the pressing process, the set screw screwdriver can pass into the sleeve tube and the screwdriver limiting block is locked outside the sleeve tube. When the pressing is completed and the set screw needs to be screwed in the "U" groove of the pedicle screw, the screwdriver limiting block moves and the set screw screwdriver extends out of the sleeve tube to screw the set screw.

[0010] In use, first use a screw holder to clamp both sides of the "U"-shaped screw seat of the pedicle screw. The screw holder does not affect the stability of the threaded sleeve during clamping. Then, rotate the sleeve inside the threaded sleeve to make it move downwards, pushing the rod into the "U"-shaped groove of the pedicle screw. Then, install the set screw in the "U"-shaped groove, adjust the position of the set screw limit block so that the set screw screwdriver can extend out of the sleeve to tighten the set screw, thus achieving stable installation of the rod. This not only integrates and simplifies the tools in the surgical procedure, but also greatly improves the installation efficiency of the rod.

[0011] Furthermore, the clamping forceps are equipped with a locking block at the end, which matches the shape of the hole on the outer wall of the "U"-shaped groove of the pedicle screw to facilitate stable clamping of the pedicle screw.

[0012] Furthermore, the handle of the nail holder is provided with mutually cooperating spring pieces. The spring pieces are divided into two pieces and are respectively installed on the two handles of the nail holder. The ends of the spring pieces are crossed in a "V" shape, which facilitates the nail holder to stably perform clamping or releasing operations.

[0013] Furthermore, on the two handles of the screw-holding forceps, one is hinged with a one-way rack, and the other is provided with a limiting tooth that cooperates with the one-way rack and an adjusting handle that can be rotated to release the engagement between the one-way rack and the limiting tooth. After the surgical operation is completed, by adjusting and opening the one-way rack, the one-way rack rotates along its hinge end and disengages from the limiting tooth, thereby releasing the clamp on the pedicle screw and removing the tool.

[0014] Furthermore, the sleeve includes a pipe section and a pressure rod section. The pipe section is threadedly connected to the threaded sleeve. The pressure rod section is located at the end of the pipe section. One of the pressure rod section and the pipe section is provided with an annular limiting groove, and the other is provided with a rotating block that extends into the annular limiting groove. When the pipe section is rotated, the pressure rod section moves up and down, and pushes the rod into the "U"-shaped groove of the pedicle screw at a stable and uniform speed.

[0015] Furthermore, the pressure bar segment is provided with a pressure block for abutting against the bar. Between the pressure bar segment and the clamping end of the nail holder, one of them is provided with a guide rod and the other is provided with a guide groove, so that the pressure bar segment can move up and down smoothly.

[0016] Furthermore, a limiting ring is provided on the outer wall of the sleeve tube. When the sleeve tube is rotated to one end of its threaded section, the limiting ring abuts against the threaded sleeve to limit the maximum displacement of the sleeve tube.

[0017] Furthermore, the screwdriver limiting block includes a limiting block, a button, and a spring, wherein:

[0018] The limiting block is sleeved on the outer wall of the set screwdriver, and the side of the limiting block is provided with an installation groove through which the set screwdriver passes.

[0019] One end of the spring is connected to the bottom of the mounting groove, and the other end is connected to the button;

[0020] The button has a locking hole, and one end of the button extends out of the mounting slot. When the spring is in its natural state, the locking hole of the button locks the screwdriver. When the button is pressed, the locking hole disengages from the screwdriver, and the screwdriver can move.

[0021] Furthermore, the set screwdriver is provided with a locking groove that mates with the locking hole.

[0022] Furthermore, one end of the set screwdriver is provided with a handle.

[0023] The beneficial effects of the present invention are as follows: Compared with the prior art, the pedicle screw vertical uniform speed pressing rod reduction forceps of the present invention have the following advantages: (1) First, the screw holder clamps the two sides of the "U" shaped screw seat of the pedicle screw. The screw holder clamp does not affect the position stability of the threaded sleeve during the clamping process. Then, the sleeve tube inside the threaded sleeve is rotated to make it go down and push the rod into the "U" shaped groove of the pedicle screw. Then, the set screw is installed in the "U" shaped groove. The position of the set screw limit block is adjusted so that the set screw screwdriver can extend out of the sleeve tube to perform a screw-tightening operation on the set screw, lock the set screw, and realize the stable installation of the rod. This not only integrates and simplifies the tools in the surgical operation process, but also greatly improves the installation efficiency of the rod; (2) When the sleeve tube section rotates, the pressing rod section moves up and down smoothly and pushes the rod into the "U" shaped groove of the pedicle screw at a stable and uniform speed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle;

[0026] Figure 3 This is an exploded view of the structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the sleeve tube of the present invention;

[0028] Among them, 1 nail holder, 11 locking block, 12 spring, 13 one-way rack, 14 limiting tooth, 15 adjusting handle, 2 pressure bar sleeve assembly, 21 threaded sleeve, 22 sleeve tube, 221 pipe section, 222 pressure bar section, 223 annular limiting groove, 224 rotating block, 225 pressure block, 226 limiting ring, 3 set screw fastening screwdriver assembly, 31 set screw screwdriver, 311 locking groove, 312 handle, 32 screwdriver limiting block, 321 limiting block, 322 button, 323 spring, 4 pedicle screw, 41 "U" groove, 42 hole, 5 rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] like Figure 1-4 In the illustrated embodiment, a pedicle screw vertical uniform speed pressure rod reduction clamp includes a screw holder 1, a pressure rod sleeve assembly 2, and a set screw fastening screwdriver assembly 3, wherein:

[0031] The clamping end of the nail holder 1 is protruding outward, and the clamping end of the nail holder 1 can hold the pedicle screw.

[0032] The pressure bar sleeve assembly 2 includes a threaded sleeve 21 and a sleeve tube 22. The threaded sleeve 21 is disposed on one side of the hinge end of the nail holder pliers. The threaded sleeve 21 is threadedly connected to the sleeve tube 22. The position of the sleeve tube 22 corresponds to the position of the protruding clamp end of the nail holder pliers 1. The sleeve tube 22 can push the rod 5 on the pedicle screw 4 into the "U" shaped groove 41 of the pedicle screw 4.

[0033] The set screw fastening screwdriver assembly 3 includes a set screw screwdriver 31 and a screwdriver limiting block 32. The screwdriver limiting block 32 is installed on the set screw screwdriver 31 in an adjustable position. During the pressing process, the set screw screwdriver 31 can penetrate into the sleeve tube 22 and the screwdriver limiting block 32 is locked outside the sleeve tube 22. When the pressing is completed and the set screw needs to be screwed in the "U" groove of the pedicle screw, the screwdriver limiting block 32 moves and the set screw screwdriver 31 extends out of the sleeve tube 22 to screw the set screw.

[0034] In use, first use the screw holder 1 to clamp both sides of the "U"-shaped screw seat of the pedicle screw. The screw holder 1 does not affect the positional stability of the threaded sleeve 21 during the clamping process. Then, rotate the sleeve tube 22 inside the threaded sleeve 21 to make it move downward, pushing the rod into the "U"-shaped groove of the pedicle screw. Then, install the set screw in the "U"-shaped groove, adjust the position of the set screw limit block so that the set screw screwdriver 31 can extend out of the sleeve tube 22 to tighten the set screw and achieve stable installation of the rod. This not only integrates and simplifies the tools in the surgical operation process, but also greatly improves the installation efficiency of the rod.

[0035] In this embodiment, the clamping end of the nail holder 1 is provided with a locking block 11, which matches the shape of the hole 42 on the outer wall of the "U"-shaped groove of the pedicle screw to facilitate stable clamping of the pedicle screw 4.

[0036] In this embodiment, the handle end of the nail holder 1 is provided with mutually cooperating spring pieces 12. The spring pieces 12 are divided into two pieces and are respectively installed on the two handles of the nail holder 1. The ends of the spring pieces 12 are crossed in a "V" shape, so that the nail holder 1 can stably perform clamping or releasing operations.

[0037] In this embodiment, one of the two handles of the screw-holding forceps 1 is hinged with a one-way rack 13, and the other is provided with a limiting tooth 14 that cooperates with the one-way rack 13 and an adjusting handle 15 that can be rotated to release the engagement between the one-way rack 13 and the limiting tooth 14. After the surgical operation is completed, the one-way rack 13 is opened by adjusting the handle 15, so that the one-way rack 13 rotates along its hinge end and disengages from the limiting tooth 14, thereby releasing the clamping of the pedicle screw 4 and removing the tool.

[0038] In this embodiment, the sleeve tube 22 includes a tube section 221 and a pressure rod section 222. The tube section 221 is threadedly connected to the threaded sleeve 21. The pressure rod section 222 is disposed at the end of the tube section 221. One of the pressure rod section 222 and the tube section 221 is provided with an annular limiting groove 223, and the other is provided with a rotating block 224 extending into the annular limiting groove 223. When the tube section 221 is rotated, the pressure rod section 222 moves up and down, and pushes the rod into the "U"-shaped groove of the pedicle screw at a stable and uniform speed.

[0039] In this embodiment, the pressure bar segment 222 is provided with a pressure block 225 for abutting against the rod 5. Between the pressure bar segment 222 and the clamp end of the nail holder 1, one of them is provided with a guide rod and the other is provided with a guide groove, so that the pressure bar segment can move up and down smoothly.

[0040] In this embodiment, a limiting ring 226 is provided on the outer wall of the sleeve tube 22. When the sleeve tube 22 rotates to one end of its threaded section, the limiting ring abuts against the threaded sleeve 21 to limit the maximum displacement of the sleeve tube 22.

[0041] In this embodiment, the screwdriver limiting block 32 includes a limiting block 321, a button 322, and a spring 323, wherein:

[0042] The limiting block 321 is sleeved on the outer wall of the set screwdriver 31, and the side of the limiting block 321 is provided with an installation groove through which the set screwdriver 31 passes.

[0043] One end of the spring 323 is connected to the bottom of the mounting groove, and the other end is connected to the button 322;

[0044] The button 322 has a locking hole, and one end of the button 322 extends out of the mounting groove. When the spring 323 is in its natural state, the locking hole of the button 322 locks the screwdriver 31. When the button 322 is pressed, the locking hole disengages from the screwdriver 31, and the screwdriver 31 can move.

[0045] In this embodiment, the set screwdriver 31 is provided with a locking groove 311 that cooperates with the locking hole.

[0046] In this embodiment, one end of the set screwdriver 31 is provided with a handle 312.

[0047] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the product form and style of the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of the present invention should fall within the patent protection scope of the present invention.

Claims

1. A pedicle screw vertical constant velocity rod reduction forceps, characterized by: Includes nail holder pliers, pressure bar sleeve assembly, and set screw fastening screwdriver assembly, wherein: The clamping end of the nail holder is protruding outward, and the clamping end of the nail holder can hold the pedicle screw; The pressure bar sleeve assembly includes a threaded sleeve and a sleeve tube. The threaded sleeve is located on one side of the hinge end of the nail holder. The threaded sleeve is threadedly connected to the sleeve tube. The position of the sleeve tube corresponds to the position of the protruding clamp end of the nail holder. The sleeve tube can push the bar on the pedicle screw into the "U"-shaped groove of the pedicle screw. The set screw fastening screwdriver assembly includes a set screw screwdriver and a screwdriver limiting block. The screwdriver limiting block is installed on the set screw screwdriver in an adjustable position. During the pressing process, the set screw screwdriver can pass into the sleeve tube and the screwdriver limiting block is locked outside the sleeve tube. When the pressing is completed and the set screw needs to be screwed in the "U" groove of the pedicle screw, the screwdriver limiting block moves and the set screw screwdriver extends out of the sleeve tube to screw the set screw. When using it, first use nail holders to hold both sides of the "U"-shaped nail seat of the pedicle screw, then rotate the sleeve inside the threaded sleeve to make it go down, push the rod into the "U"-shaped groove of the pedicle screw, then install the set screw in the "U"-shaped groove, adjust the position of the set screw limit block so that the set screw screwdriver can extend out of the sleeve to tighten the set screw.

2. The vertical constant speed rod reduction forceps for pedicle screw according to claim 1, characterized in that: The clamping pliers have a locking block at the end, which matches the shape of the hole on the outer wall of the "U"-shaped groove of the pedicle screw.

3. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 1, characterized in that: The nail-holding pliers have interlocking spring pieces at the handle end. The spring pieces are divided into two pieces and are respectively installed on the two handles of the nail-holding pliers. The ends of the spring pieces cross each other in a "V" shape.

4. A pedicle screw vertical uniform speed compression rod reduction clamp according to claim 1 or 3, characterized in that: The nail-holding pliers have two handles, one of which is hinged with a one-way rack, and the other is equipped with a limiting tooth that engages with the one-way rack and an adjusting handle that can be rotatably disengaged from the one-way rack.

5. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 1, characterized in that: The sleeve includes a pipe section and a pressure bar section. The pipe section is threadedly connected to the threaded sleeve. The pressure bar section is located at the end of the pipe section. One of the pressure bar section and the pipe section is provided with an annular limiting groove, and the other is provided with a rotating block that extends into the annular limiting groove.

6. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 5, characterized in that: The pressure bar end is provided with a pressure block for abutting against the bar. Between the pressure bar end and the clamp end of the nail holder, one end is provided with a guide rod and the other end is provided with a guide groove.

7. A pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 1 or 5, characterized in that: The outer wall of the sleeve is provided with a limiting ring, and when the sleeve is rotated to one end of its threaded section, the limiting ring abuts against the threaded sleeve.

8. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 1, characterized in that: The screwdriver limiting block includes a limiting block, a button, and a spring, wherein: The limiting block is sleeved on the outer wall of the set screwdriver, and the side of the limiting block is provided with an installation groove through which the set screwdriver passes. One end of the spring is connected to the bottom of the mounting groove, and the other end is connected to the button; The button has a locking hole, and one end of the button extends out of the mounting slot. When the spring is in its natural state, the locking hole of the button locks the screwdriver. When the button is pressed, the locking hole disengages from the screwdriver, and the screwdriver can move.

9. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 8, characterized in that: The set screwdriver is provided with a locking groove that mates with the locking hole.

10. The pedicle screw vertical uniform speed pressure rod reduction clamp according to claim 1, characterized in that: The screwdriver has a handle at one end.

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