A skull base depression reduction forceps

Abstract

The present application relates to a kind of skull base depression reset forceps, including first support, second support and telescopic support, first support and second support are hinged, first support end and second support end form handle, telescopic support end telescopic sleeve is set in second support front end, telescopic support front end is vertically provided with reset arm, first support front end is vertically provided with support arm, by adjusting the length of telescopic support entering second support to adapt when support arm supports left and right connecting rod, reset arm can be matched with reset clamping hook;By clamping pressure handle to make reset arm and support arm apart, realize the upward movement of skull;Reset arm includes lifting structure and the clamping hook structure at the lower end of lifting structure;Clamping hook structure is engaged with reset clamping hook, and by lifting structure, occipital bone fixing plate is driven to move back and reset with skull.The present application effectively solves the problems of insufficient reset force, complex reset operation and the like, improves the reset effect of skull base depression, and improves the work efficiency of medical staff.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a cranial base depression reduction clamp. Background Technology

[0002] In basilar impression, the odontoid process of the axis vertebra often shifts upwards and backwards into the cranium, compressing the medulla oblongata and causing numbness and weakness in the limbs. The goal of basilar impression reduction surgery is to pull the odontoid process downwards and simultaneously move it forwards, thereby relieving spinal cord compression and achieving optimal reduction of the odontoid process, leading to the best surgical outcome. Currently, clinical practice typically employs a combination of methods for reduction, including cranial traction, assisting in extending the head backwards, increasing the curvature of the connecting rod, and spreading the cervical screws and occipital fixation plate. However, due to limited force and the fact that many reduction methods involve unidirectional force, it is often impossible to address multiple aspects simultaneously, resulting in a complex and difficult reduction process with generally poor results. Furthermore, the surgical outcome often fails to meet the patient's reduction requirements. The root cause is the lack of effective reduction tools. Summary of the Invention

[0003] To address the existing problems, this invention proposes a craniotomy reduction forceps, which effectively solves the problems of insufficient reduction force and complicated and difficult reduction operation in the prior art, effectively improves the reduction effect of craniotomy, and improves the work efficiency of medical staff.

[0004] The technical solution of this invention is implemented as follows:

[0005] A cranial base depression reduction forceps includes a first support, a second support, and a telescopic support. The first support and the second support are hinged together. The ends of the first support and the second support form handles. The end of the telescopic support is telescopically sleeved on the front end of the second support. The front end of the telescopic support is vertically provided with a reduction arm, and the front end of the first support is vertically provided with a support arm. By adjusting the length of the telescopic support extending into the second support, the reduction arm can be adapted to engage with the reduction hook in the middle of the occipital fixation plate when the support arm supports the left and right connecting rods. By clamping the handles at the ends of the first support and the second support, the reduction arm and the support arm are opened to achieve longitudinal opening and reduction of the skull and cervical vertebrae.

[0006] The reduction arm includes a lifting structure and a hook structure. The hook structure is located at the lower end of the lifting structure. The hook structure is perpendicular to the second bracket and is higher than the lower end of the support arm, so that the hook structure can engage with the reduction hook. The lifting structure drives the hook structure to be lifted upward, so that the reduction arm drives the occipital fixation plate and the skull to move backward and rotate backward to reduce the reduction.

[0007] Preferably, the hook structure includes a vertical part and an oblique hook part, and the angle between the oblique hook part and the vertical part is an acute angle. The oblique hook part cooperates with the repositioning hook to drive the occipital fixation plate and the skull to move and rotate backward.

[0008] Preferably, the end of the oblique hook is provided with a groove, which engages with the bottom of the reset hook through the groove opening, so as to drive the occipital fixation plate and the skull to rotate backward or forward.

[0009] Preferably, the front end of the second bracket is provided with a telescopic groove, the telescopic bracket is movably fitted in the telescopic groove, and the second bracket is provided with a first limiting screw at the front end of the telescopic groove, and the telescopic bracket is fixed to the front end of the second bracket by the first limiting screw.

[0010] Preferably, the handles of the first and second brackets are provided with a spring structure in the middle that is pressed between the inner sides of the handles. The spring structure includes a spring plate, a fastening screw and a sliding block. A groove is provided in the middle of the handle of the second bracket. One end of the spring plate is fixed to the sliding block by the fastening screw and slides back and forth in the groove by the sliding block. The other end of the spring plate is fixed to the handle of the first bracket.

[0011] Preferably, a limiting structure is provided between the handle ends of the first bracket and the second bracket. The limiting structure includes a screw and a second limiting nut. One end of the screw is fixed to the handle end of the first bracket through a connector, and the other end of the screw passes through the handle end of the second bracket and connects to the second limiting nut. By clamping the handles of the first bracket and the second bracket, and through the threaded engagement between the second limiting nut and the screw, the reset arm and the support arm are opened up to achieve longitudinal opening and reset of the skull and cervical vertebrae.

[0012] Preferably, the front ends of both the first bracket and the telescopic bracket are vertically downward; an angle α is formed between the front end of the first bracket and the handle of the first bracket, and an angle β is formed between the front end of the telescopic bracket and the handle of the second bracket, wherein the values ​​of the angles α and β are both in the range of 45° to 180°.

[0013] Preferably, the lifting structure includes a movable rod, a connecting rod, and a limiting sleeve. One end of the connecting rod has a groove, and one end of the movable rod has a protrusion. The groove and the protrusion engage to allow the connecting rod and the movable rod to be movably connected. The other end of the connecting rod is connected to the hook structure. The end of the movable rod away from the protrusion has a nut. The limiting sleeve is sleeved on the outside of the movable rod and the connecting rod. The nut drives the movable rod to engage with the limiting sleeve threadedly, thereby driving the connecting rod and the hook structure to move up and down.

[0014] Preferably, the limiting sleeve is provided with an observation port and scale for observing the vertical movement distance of the movable rod. The limiting sleeve is provided with a third limiting screw in the observation port for restricting the rotation of the connecting rod. The connecting rod is provided with at least one through hole evenly distributed. The third limiting screw passes through the through hole and is restricted by the observation port to limit the rotation of the connecting rod within the limiting sleeve.

[0015] Preferably, the lower end of the support arm is provided with a support portion for fitting around the outside of the pedicle screw. The support portion has at least two openings, and the two openings communicate with the U-shaped groove of the pedicle screw. The connecting rod passes through the U-shaped groove of the pedicle screw and the two openings of the support portion so that the support arm supports the connecting rod.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] During repositioning, this invention adjusts the length of the telescopic bracket extending into the second bracket so that the repositioning arm is positioned in front of or behind the support arm. This flexible adjustment adapts to the situation where the support arm supports the connecting rods on both sides. The repositioning arm can precisely engage with the repositioning hook in the middle of the occipital fixation plate, allowing for flexible repositioning and improving the practicality of the repositioning forceps. Specifically, the support arm is positioned at the pedicle screw of the occipital fixation structure to support the connecting rods. The hook structure of the repositioning arm engages with the repositioning hook on the occipital fixation plate. First, the handle ends of the first and second brackets are clamped to... The reduction arm at the front end is spread apart from the support arm, thereby achieving longitudinal separation between the skull and cervical vertebrae, which effectively corrects the downward displacement of the skull. The lifting structure drives the hook structure to lift upward, so that the reduction arm moves the occipital fixation plate and the skull backward and rotates backward. Through the above two reduction forces, the skull base can be moved upward and backward, that is, the odontoid process of the axis can be moved downward and forward, ultimately achieving the purpose of reduction. This further solves the problems of insufficient reduction force and complicated and difficult reduction operation in the existing technology, effectively improves the reduction effect of skull base depression, and improves the work efficiency of medical staff. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an axial view of the skull base depression reduction forceps of the present invention;

[0020] Figure 2This is a schematic diagram of the skull base depression reduction forceps of the present invention driving the occipital bone fixation structure to reduce the depression.

[0021] Figure 3 This is a side view of the skull base depression reduction forceps of the present invention;

[0022] Figure 4 This is a schematic diagram (A) showing the cooperation between the telescopic support of the skull base depression reduction forceps and the second support of the present invention.

[0023] Figure 5 This is a detailed schematic diagram of the reduction arm of the skull base depression reduction forceps of the present invention;

[0024] Figure 6 This is a schematic diagram of point C, showing the connection between the movable rod and the connecting rod of the skull base depression reduction forceps of the present invention;

[0025] Figure 7 This is a schematic diagram of the first and second support handles of the skull base depression reduction forceps of the present invention;

[0026] Figure 8 This is a cross-section of the spring structure of the skull base depression reduction clamp of the present invention. Figure 1 ;

[0027] Figure 9 This is a cross-section of the spring structure of the skull base depression reduction clamp of the present invention. Figure 2 ;

[0028] Figure 10 This is a schematic diagram of the limiting sleeve for reducing skull base depression forceps according to the present invention;

[0029] Figure 11 This is a schematic diagram of the support arm of the skull base depression reduction forceps of the present invention.

[0030] Attached image labels:

[0031] 1. Support arm; 10. First bracket; 11. Support part; 111. Opening; 2. Reset arm; 20. Second bracket; 201. Telescopic groove; 202. First limiting screw; 21. Lifting structure; 22. Hook structure; 222. Slot; 223. Vertical part; 224. Angled hook part; 23. Movable rod; 231. Protrusion; 232. Nut; 24. Connecting rod; 241. Groove; 242. Through hole; 25. Limiting sleeve; 251. Observation port; 252. Scale; 253. Third limiting screw; 26. Slide groove; 30. Connecting rod; 31. Spring structure; 311. Spring; 312. Fastening screw; 313. Sliding block; 32. Limiting structure; 321. Screw; 322. Second limiting nut; 40. Reset hook; 50. Pedicle screw; 60. Telescopic bracket. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] like Figures 1 to 11 The present invention provides a cranial base depression reduction forceps, including a first support 10, a second support 20 and a telescopic support 60. The first support 10 and the second support 20 are hinged together. The ends of the first support 10 and the second support 20 form handles. The end of the telescopic support 60 is telescopically sleeved on the front end of the second support 20. The front end of the telescopic support 60 is vertically provided with a reduction arm 2. The front end of the first support 10 is vertically provided with a support arm 1. By adjusting the length of the telescopic support 60 extending into the second support 20, the reduction arm 2 can cooperate with the reduction hook 40 in the middle of the occipital fixation plate when the support arm 1 supports the left and right connecting rods 30.

[0036] Specifically, such as Figure 4As shown, the front end of the second support 20 is provided with a telescopic groove 201, and the telescopic support 60 is movably sleeved in the telescopic groove 201 so that the telescopic support 60 can extend and retract in the telescopic groove 201 according to different surgical conditions; the second support 20 has a through hole at the front end of the telescopic groove 201, and a first limiting screw 202 is provided on the through hole. Therefore, when the telescopic support 60 is adjusted into place in the telescopic groove 201, the telescopic support 60 can be fixed in the telescopic groove 201 of the second support 20 by the first limiting screw 202 to prevent the telescopic support 60 from sliding and affecting the repositioning effect;

[0037] The occipital fixation structure includes an occipital fixation plate, a connecting rod 30, and pedicle screws 50. The occipital fixation plate is used to fix the skull to the patient's skull to assist in the reduction of basilar indentation using reduction forceps. Figure 2 As shown, the occipital fixation plate includes a central plate and lateral branches distributed on both sides of the central plate. The central plate is equipped with a reduction hook 40 that cooperates with the reduction forceps. Each of the lateral branches is equipped with a connecting rod 30 for self-reduction. The ends of the connecting rods 30 on both sides are inserted into pedicle screws 50, which are fixed to the cervical spine. For the reduction forceps, the support arm 1 at the front end of its first bracket 10 supports the connecting rods 30 at the pedicle screws 50 on both sides, and the reduction arm 2 at the front end of its telescopic bracket 60 cooperates with the reduction hook 40 in the middle of the occipital fixation plate to reduce the skull base depression. Therefore, when the support arm 1 supports the connecting rod 30 on the left side, the reduction arm 2 needs to be adjusted to be positioned at the support... Behind arm 1, since the length of the telescopic bracket 60 extending into the second bracket 20 is adjustable, and the reduction arm 2 is located at the front end of the telescopic bracket 60, the reduction arm 2 can be adjusted to be behind the support arm 1 and to the corresponding position of the reduction hook 40 on the occipital fixation plate by adjusting the length of the telescopic bracket 60 extending into the second bracket 20, and the position of the reduction arm 2 can be fixed by tightening the first limiting screw 202; when the support arm 1 supports the connecting rod 30 on the right side, the reduction arm 2 needs to be located in front of the support arm 1. Similarly, by adjusting the length of the telescopic bracket 60 extending into the second bracket 20 and tightening the first limiting screw 202, the reduction forceps can complete the reduction of the skull base depression with the occipital fixation plate;

[0038] Since the first support 10 and the second support 20 are hinged, the distance between the first support 10 and the front end of the telescopic support 60, i.e. the distance between the reset arm 2 and the support arm 1, can be adjusted by clamping or loosening the handles at the ends of the first support 10 and the second support 20. Therefore, when the reset arm 2 is engaged with the reset hook 40 and the support arm 1 supports the connecting rod 30, the reset arm 2 and the support arm 1 can be opened by clamping the handles at the ends of the first support 10 and the second support 20, thereby achieving longitudinal opening of the skull and cervical vertebrae, so that the downward displacement of the skull is well corrected, i.e., the upward displacement of the skull is achieved, i.e., the downward displacement of the odontoid process.

[0039] The reduction arm 2 includes a lifting structure 21 and a hook structure 22. The hook structure 22 is located at the lower end of the lifting structure 21. The hook structure 22 is perpendicular to the second bracket 20 and is higher than the lower end of the support arm 1 so that the hook structure 22 can engage with the reduction hook 40. The lifting structure 21 drives the hook structure 22 to be lifted upward so that the reduction arm 2 can drive the occipital fixation plate and the skull to move backward and rotate backward to reduce the reduction.

[0040] Specifically, the reduction arm 2 includes a lifting structure 21 and a hook structure 22. The reduction arm 2 cooperates with the reduction hook 40 on the occipital fixation plate through the hook structure 22, and drives the occipital fixation plate and the skull to move backward and rotate backward for reduction through the lifting structure 21.

[0041] Because the assistant holds the reduction forceps on the patient's right side during the basilar indentation reduction procedure, the hook structure 22 must be vertically positioned on the second support 20 to engage with the reduction hook 40 on the occipital fixation plate. Furthermore, since the reduction hook 40 is positioned above the support point of the connecting rod 30 on the occipital fixation plate, the hook structure 22 must be positioned above the lower end of the support arm 1 to engage with the reduction hook 40. See details [link to details]. Figures 1 to 3 , Figure 5 ;

[0042] The hook structure 22 is located at the lower end of the lifting structure 21. When the hook structure 22 engages with the reduction hook 40, the lifting structure 21 drives the hook structure 22 to be lifted upward. At the same time, the hook structure 22 drives the occipital fixation plate to move backward and rotate backward along with the skull to reduce the skull base depression. When the skull rotates backward, the skull base moves upward and backward, that is, the odontoid process of the axis moves downward and forward, further realizing the reduction of the skull base depression.

[0043] In practice, the occipital fixation plate is first fixed to the patient's skull. The assistant holds the handle of the reduction forceps on the patient's right side. At this time, the second support 20 and the telescopic support 60 are located on the side close to the occipital fixation plate, and the first support 10 is located on the side away from the occipital fixation plate. When the support arm 1 supports the connecting rod 30 on the left, the length of the telescopic support 60 extending into the telescopic groove 201 is adjusted to position the reduction arm 2 behind the support arm 1 and at the corresponding position of the reduction hook 40 on the occipital fixation plate. The first limiting screw 202 is then tightened. Next, the hook structure 22 is engaged with the reduction hook 40 on the occipital fixation plate. Then, the lifting structure 21 is adjusted to pull the hook structure 22 upward, thereby causing the hook structure 22 to move the occipital fixation plate and the skull backward and rotate backward for reduction. The operation when the support arm 1 supports the connecting rod 30 on the right is the same as described above. When the skull rotates backward, the skull base moves upward and backward, that is, the odontoid process of the axis moves downward and forward, further increasing the reduction effect of the skull base depression.

[0044] Further improvements are made in, such as Figure 5 As shown, the hook structure 22 includes a vertical part 223 and an oblique hook part 224. The upper end of the vertical part 223 is connected to the lower end of the lifting structure 21, and the lower end of the vertical part 223 is connected to the oblique hook part 224. The other end of the oblique hook part 224 engages with the reset hook 40. The angle between the oblique hook part 224 and the vertical part 223 is an acute angle, so that when the oblique hook part 224 engages with the reset hook 40 for reset, the oblique hook part 224 can generate a greater backward rotation effect, making the reset clamp more effective.

[0045] Further improvements are made in, such as Figure 5 As shown, the end of the oblique hook portion 224 is provided with a slot 222, which matches the repositioning hook 40 on the occipital fixation plate. Therefore, the repositioning arm 2 can be precisely engaged with the bottom of the repositioning hook 40 through the slot of the slot 222. When the repositioning hook 40 is placed in the slot 222 of the oblique hook portion 224, the slot 222 limits the repositioning hook 40 so that the repositioning hook 40 can be repositioned backward or forward under the action of the slot 222. Therefore, it can be adjusted in time according to the repositioning situation during the repositioning operation, which more effectively improves the repositioning effect.

[0046] Further improvements are made in, such as Figures 7 to 9 As shown, the handles of the first support 10 and the second support 20 are provided with a spring structure 31 in the middle, which is pressed between the inner sides of the handles. The spring structure 31 includes a spring 311, a fastening screw 312 and a sliding block 313. The handle of the second support 20 is provided with a sliding groove 26. One end of the spring 311 is fixed to the sliding block 313 by the fastening screw 312 and slides back and forth in the sliding groove 26 by the sliding block 313. The other end of the spring 311 is fixed at the handle of the first support 10. Therefore, by pressing the spring 311, the sliding block 313 can be moved to slide in the sliding groove 26 of the second support 20, so that the distance between the handles of the first support 10 and the second support 20 can be adjusted by one hand. This allows adjustment of the distance between the front end of the first support 10 and the front end of the telescopic support 60, that is, the distance between the reset arm 2 and the support arm 1. Therefore, when the handles of the first support 10 and the second support 20 are clamped by one hand, the support arm 1 and the reset arm 2 are spread apart, so that the skull and cervical vertebrae are longitudinally spread apart and reset, thereby realizing the downward movement of the odontoid process.

[0047] Further improvements are made in, such as Figure 7As shown, a limiting structure 32 is provided between the handle ends of the first support 10 and the second support 20. The limiting structure 32 includes a screw 321 and a second limiting nut 322. One end of the screw 321 is fixed to the handle end of the first support 10 through a connector. The handle end of the second support 20 has a screw through hole. The other end of the screw 321 passes through the screw through hole and connects to the second limiting nut 322. By clamping the handles of the first support 10 and the second support 20, and through the threaded engagement between the second limiting nut 322 and the screw 321, the distance between the handles of the first support 10 and the second support 20 is limited, thereby opening the support arm 1 and the reduction arm 2, and thus achieving longitudinal opening and reduction of the skull and cervical vertebrae. The design of the limiting structure 32 is to achieve more precise adjustment and maintenance of the distance between the first support 10 and the second support 20, and between the support arm 1 and the reduction arm 2, thereby improving the reduction effect.

[0048] In specific operation, pressure is gradually applied to the handles of the first support 10 and the second support 20 according to the surgical situation. At this time, the support arm 1 and the reduction arm 2 are opened up, realizing the longitudinal opening between the skull and the cervical spine. When the skull displacement is well corrected, the second limiting nut 322 is tightened to the outside of the second support 20 to fix and maintain the distance between the support arm 1 and the reduction arm 2. Alternatively, the handles of the first support 10 and the second support 20 can be slowly pressed up by gradually tightening the second limiting nut 322 to obtain a precise opening operation between the support arm 1 and the reduction arm 2.

[0049] A further improvement is that the front ends of both the first support 10 and the telescopic support 60 are vertically downward, making the support arm 1 and the reset arm 2 perpendicular to the surgical field of view, which facilitates the operation of medical personnel; an angle α is formed between the front end of the first support 10 and the handle of the first support 10, and an angle β is formed between the front end of the telescopic support 60 and the handle of the second support 20. The values ​​of angles α and β are both in the range of 45° to 180°. Due to different surgical habits of each doctor or different surgical scenarios, different angles can adapt to different needs. In this embodiment, the values ​​of angles α and β are both 80°.

[0050] Further improvements are made in, such as Figure 5 , Figure 6As shown, the lifting structure 21 includes a movable rod 23, a connecting rod 24, and a limiting sleeve 25. The limiting sleeve 25 is sleeved on the outside of the movable rod 23 and the connecting rod 24, and the movable rod 23 has a thread that matches the thread on the inner wall of the limiting sleeve 25. The movable rod 23 is movably sleeved in the limiting sleeve 25 through the thread. One end of the connecting rod 24 has a groove 241, and one end of the movable rod 23 has a protrusion 231. The groove 241 and the protrusion 231 cooperate to make the connecting rod 24 and the movable rod 23 movably connected. The end of the connecting rod 24 away from the groove 241 is connected to the hook structure 22, and the end of the movable rod 23 away from the protrusion 231 has a nut 232.

[0051] In specific operation, rotating the nut 232 causes the movable rod 23 to engage with the threaded part of the limiting sleeve 25, so that the movable rod 23 can move in and out within the limiting sleeve 25, thereby driving the connecting rod 24 and the hook structure 22 to move up and down, achieving the effect of posterior displacement and posterior rotation of the skull.

[0052] Further improvements are made in, such as Figure 10 As shown, the limiting sleeve 25 is provided with an observation port 251 and a scale 252 for observing the vertical movement distance of the movable rod 23. Through the observation port 251, the vertical rotation distance of the movable rod 23 inside the limiting sleeve 25 can be observed, which is the vertical movement distance of the hook structure 22. The repositioning distance of the skull can be seen intuitively, so the repositioning distance of the skull can be accurately controlled.

[0053] like Figure 5 As shown, the limiting sleeve 25 has a third limiting screw 253 in the observation port 251 to limit the rotation of the connecting rod 24. The connecting rod 24 has at least one through hole 242 evenly distributed on it. The third limiting screw 253 passes through the through hole 242. Multiple through holes 242 can be provided on the connecting rod 24. The third limiting screw 253 can be screwed into different through holes 242 according to different lifting distances. When the third limiting screw 253 is screwed into the through hole 242, the opening shape of the observation port 251 restricts the third limiting screw 253 so that the connecting rod 24 can only move up and down within the limiting sleeve 25, but cannot rotate with the moving rod 23 within the limiting sleeve 25. This is to avoid misalignment of the hook structure 22 connected to the lower end of the connecting rod 24, which would result in poor reset effect.

[0054] Further improvements are made in, such as Figure 2 , Figure 11As shown, the lower end of the support arm 1 is provided with a support portion 11 for fitting onto the outside of the pedicle screw 50. The support portion 11 has at least two openings 111. In this embodiment, the support portion 11 has four openings 111, with two pairs of openings 111 arranged opposite each other. When supporting the connecting rod 30, the two openings 111 communicate with the U-shaped groove of the pedicle screw 50, so that the connecting rod 30 can pass through the U-shaped groove of the pedicle screw 50 and the two openings 111 of the support portion 11. The U-shaped groove is equipped with a nut, and the support arm 1 has a hollow structure. Therefore, when the connecting rod 30 passes through the U-shaped groove of the pedicle screw 50 and the two openings 111 of the support part 11, the nut screwdriver can tighten or loosen the nut in the U-shaped groove of the pedicle screw 50 in the hollow structure of the support arm 1 to adjust the support arm 1 to hold the connecting rod 30, so that the support arm 1 can support or push on the connecting rod 30; the four openings 111 are opposite to each other in pairs, so they can adapt to support the connecting rod 30 at different angles.

[0055] In practical use, taking the support arm 1 supporting the connecting rod 30 on the right side as an example, such as... Figure 2 As shown, first, the occipital fixation plate is fixed to the patient's skull. The doctor's assistant holds the handle of the reduction forceps on the patient's right side and engages the opening 111 of the support arm 1 with the pedicle screw 50 on the right connecting rod 30 to support the right connecting rod 30. By adjusting the length of the telescopic bracket 60 extending into the front end of the second bracket 20, the reduction arm 2 is adjusted to be located in front of the support arm 1. When the reduction arm 2 is in the corresponding position of the occipital fixation plate, the first limiting screw 202 is tightened to fix it. Then, the slot 222 at the end of the oblique hook portion 224 of the hook structure 22 is engaged with the reduction hook 40. Next, the hand at the end of the first bracket 10 and the second bracket 20... The handle is gradually clamped and closed, opening the space between the front support arm 1 and the reduction arm 2. Once the opening corrects the downward displacement of the skull, the second limiting nut 322 is tightened to the outside of the second bracket 20 to fix and maintain the distance between the support arm 1 and the reduction arm 2. Then, the nut 232 is rotated, causing the movable rod 23 to engage with the threaded part of the limiting sleeve 25, pulling the connecting rod 24 and the hook structure 22 upward. This causes the hook structure 22 to move the occipital fixation plate and the skull backward and rotate backward for reduction. When the skull rotates backward, the skull base moves upward and backward, i.e., the odontoid process of the axis moves downward and forward, further improving the reduction effect of the skull base depression. The operation when the support arm 1 supports the connecting rod 30 on the other side is the same as described above.

[0056] Meanwhile, during the repositioning process, the distance the hook structure 22 moves up and down can be observed and controlled through the observation port 251 and the scale 252 to accurately control the repositioning distance of the skull.

[0057] In summary, during repositioning, this invention adjusts the length of the telescopic bracket extending into the second bracket so that the repositioning arm is positioned in front of or behind the support arm. This flexible adjustment adapts to the situation where the support arm supports the connecting rods on both sides. The repositioning arm can precisely engage with the repositioning hook in the middle of the occipital fixation plate, allowing for flexible repositioning and improving the practicality of the repositioning forceps. Specifically, the support arm is positioned at the pedicle screws of the occipital fixation structure to support the connecting rods. The hook structure of the repositioning arm engages with the repositioning hook on the occipital fixation plate. First, the handles of the first and second brackets are clamped together. The end of the device allows the reduction arm at the front end to be separated from the support arm, thereby achieving longitudinal separation between the skull and cervical vertebrae, which effectively corrects the downward displacement of the skull. Furthermore, the lifting structure drives the hook structure upward, causing the reduction arm to move the occipital fixation plate and the skull posteriorly and posteriorly. Through these two reduction forces, the skull base can be moved superiorly and posteriorly, i.e., the odontoid process of the axis vertebrae can be moved inferiorly and anteriorly, ultimately achieving the reduction goal. This further solves the problems of insufficient reduction force and complex and difficult reduction operations in existing technologies, effectively improving the reduction effect of skull base depression and increasing the work efficiency of medical staff.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A forceps for reducing skull base depression, characterized in that, The system includes a first support (10), a second support (20), and a telescopic support (60). The first support (10) and the second support (20) are hinged together. The ends of the first support (10) and the second support (20) form handles. The end of the telescopic support (60) is telescopically sleeved on the front end of the second support (20). The front end of the telescopic support (60) is vertically provided with a reduction arm (2). The front end of the first support (10) is vertically provided with a support arm (1). By adjusting the length of the telescopic support (60) extending into the second support (20), the reduction arm (2) can cooperate with the reduction hook (40) in the middle of the occipital fixation plate when the support arm (1) supports the left and right connecting rods (30). By clamping the handles at the ends of the first support (10) and the second support (20), the reduction arm (2) and the support arm (1) are opened to achieve longitudinal opening and reduction of the skull and cervical vertebrae. The reduction arm (2) includes a lifting structure (21) and a hook structure (22). The hook structure (22) is located at the lower end of the lifting structure (21). The hook structure (22) is perpendicular to the second bracket (20) and is higher than the lower end of the support arm (1) so that the hook structure (22) can engage with the reduction hook (40). The lifting structure (21) drives the hook structure (22) to be lifted upward so that the reduction arm (2) drives the occipital fixation plate to move backward and rotate backward along with the skull to reduce its position.

2. The skull base depression reduction forceps according to claim 1, characterized in that, The hook structure (22) includes a vertical part (223) and an oblique hook part (224). The angle between the oblique hook part (224) and the vertical part (223) is an acute angle. The oblique hook part (224) cooperates with the repositioning hook (40) to drive the occipital fixation plate and the skull to move backward and rotate backward.

3. The skull base depression reduction forceps according to claim 2, characterized in that, The end of the oblique hook (224) is provided with a slot (222), which engages with the bottom of the reset hook (40) through the opening of the slot (222) to drive the occipital fixation plate and the skull to rotate backward or forward.

4. The skull base depression reduction forceps according to claim 1, characterized in that, The second bracket (20) has a telescopic groove (201) at its front end. The telescopic bracket (60) is movably fitted in the telescopic groove (201). The second bracket (20) has a first limiting screw (202) at the front end of the telescopic groove (201). The telescopic bracket (60) is fixed to the front end of the second bracket (20) by the first limiting screw (202).

5. The skull base depression reduction forceps according to claim 1, characterized in that, The first bracket (10) and the second bracket (20) have a spring structure (31) in the middle of their handles that springs between the inner sides of the handles. The spring structure (31) includes a spring (311), a fastening screw (312), and a sliding block (313). The handle of the second bracket (20) has a groove (26) in the middle. One end of the spring (311) is fixed to the sliding block (313) by the fastening screw (312) and slides back and forth in the groove (26) by the sliding block (313). The other end of the spring (311) is fixed to the handle of the first bracket (10).

6. The skull base depression reduction forceps according to claim 4, characterized in that, A limiting structure (32) is provided between the handle ends of the first bracket (10) and the second bracket (20). The limiting structure (32) includes a screw (321) and a second limiting nut (322). One end of the screw (321) is fixed to the handle end of the first bracket (10) by a connector. The other end of the screw (321) passes through the handle end of the second bracket (20) and is connected to the second limiting nut (322). By clamping the handles of the first bracket (10) and the second bracket (20), and by the threaded engagement between the second limiting nut (322) and the screw (321), the repositioning arm (2) and the support arm (1) are opened up to achieve longitudinal opening and repositioning of the skull and cervical vertebrae.

7. The skull base depression reduction forceps according to claim 1, characterized in that, The front ends of the first bracket (10) and the telescopic bracket (60) are both vertically downward; the front end of the first bracket (10) forms an angle α with the handle of the first bracket (10), and the front end of the telescopic bracket (60) forms an angle β with the handle of the second bracket (20). The values ​​of the angles α and β are both in the range of 45° to 180°.

8. The skull base depression reduction forceps according to claim 3, characterized in that, The lifting structure (21) includes a movable rod (23), a connecting rod (24), and a limiting sleeve (25). One end of the connecting rod (24) has a groove (241), and one end of the movable rod (23) has a protrusion (231). The groove (241) and the protrusion (231) cooperate to make the connecting rod (24) and the movable rod (23) movably connected. The other end of the connecting rod (24) is connected to the hook structure (22). The end of the movable rod (23) away from the protrusion (231) has a nut (232). The limiting sleeve (25) is sleeved on the outside of the movable rod (23) and the connecting rod (24). The nut (232) drives the movable rod (23) to engage with the limiting sleeve (25) threadedly, so as to drive the connecting rod (24) together with the hook structure (22) to move up and down.

9. The skull base depression reduction forceps according to claim 8, characterized in that, The limiting sleeve (25) is provided with an observation port (251) and a scale (252) for observing the vertical movement distance of the movable rod (23). The limiting sleeve (25) is provided with a third limiting screw (253) in the observation port (251) for restricting the rotation of the connecting rod (24). The connecting rod (24) is provided with at least one through hole (242) evenly. The third limiting screw (253) passes through the through hole (242) and is restricted by the observation port (251) to restrict the rotation of the connecting rod (24) within the limiting sleeve (25).

10. The skull base depression reduction forceps according to claim 5, characterized in that, The lower end of the support arm (1) is provided with a support part (11) for sleeved on the outside of the pedicle screw (50). The support part (11) has at least two openings (111), and the two openings (111) are connected to the U-shaped groove of the pedicle screw (50). The connecting rod (30) passes through the U-shaped groove of the pedicle screw (50) and the two openings (111) of the support part (11) so that the support arm (1) supports the connecting rod (30).

Images