A spondylolisthesis side front road screwing back to normal force pliers

Abstract

A lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis includes a first and a second operating arm disposed opposite to each other, the proximal ends of which form a gripping portion and the distal ends extend to the surgical area; a linkage device disposed between the first and second operating arms for driving the first and second operating arms to move relative to each other; a rotation drive device disposed at at least one location of the gripping portion, perpendicular to the operating plane formed by the relative movement of the first and second operating arms, for manipulating the rotation drive device to rotate clockwise or counterclockwise to drive the operating plane to rotate synchronously, thereby causing the vertebral body to slide forward or backward for reduction; and a support plate disposed at the distal ends of the first and second operating arms for contacting the vertebral body surface and providing support.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis. Background Technology

[0002] Traditional lumbar spondylolisthesis reduction surgery requires the sequential or simultaneous use of multiple instruments for dislocation, clamping, and reduction, resulting in numerous instruments, complex procedures, and difficulties in coordination. In particular, there is a lack of specialized instruments capable of effectively clamping or dislocating the vertebral body while simultaneously providing controllable, overall rotation around a specific axis for precise reduction. This leads to low surgical efficiency, poor reduction accuracy, and a high risk of trauma to surrounding tissues. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a lateral anterior rotation reduction clamp for lumbar spondylolisthesis.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis, comprising

[0006] The first and second operating arms are hinged together, with their proximal ends forming a gripping part and their distal ends extending to the surgical area.

[0007] A rotary drive device, disposed at at least one location on the gripping portion, is perpendicular to the operating plane formed by the relative movement of the first and second operating arms. Operating the rotary drive device clockwise or counterclockwise rotates the operating plane synchronously, causing the vertebral body to slide forward or backward and reset.

[0008] Support plates are respectively disposed at the distal ends of the first and second operating arms, for contacting the surface of the vertebral body and providing support.

[0009] Furthermore, the support plate includes a connecting portion and a friction portion, the connecting portion extending in an S-shape along one side of the operating arm, and the friction portion being located at the end of the connecting portion.

[0010] Furthermore, the two support plates are arranged opposite to each other. When the first operating arm and the second operating arm are close to each other, the two friction parts are in contact with each other, and a gap is formed between the two connecting plates.

[0011] Furthermore, the opposite sides of the two friction parts are arc-shaped surfaces, and the arc-shaped surfaces are provided with anti-slip particles.

[0012] Furthermore, the rotary drive device is a rotary grip, which is located at the proximal end of the first operating arm.

[0013] Furthermore, it also includes a linkage device, which includes a first link and a second link, the middle parts of the first link and the second link being hinged to each other, and the first link and the second link being respectively mounted on the first operating arm and the second operating arm.

[0014] Furthermore, the rotation axes of the first and second links are coaxial with the rotation axes of the first and second operating arms.

[0015] Furthermore, the end of the first operating arm is provided with a fixed toothed rod, and the end of the fixed toothed rod away from the first operating arm is in a free structure; the fixed toothed rod is provided with continuously distributed toothed grooves, and a limiting block is provided at the end of the second operating arm accordingly, and the limiting block engages with the toothed grooves.

[0016] Furthermore, the first operating arm and the second operating arm are respectively provided with a first abutting part and a second abutting part on their inner sides. The first abutting part and the second abutting part contact each other when the gripping part is closed, so as to limit the minimum distance.

[0017] Furthermore, the first and second manipulators are both integrally formed structures.

[0018] The beneficial effects of this invention are:

[0019] 1. The lateral anterior approach rotation reduction clamp proposed in this invention achieves the unification of clamping, spreading and three-dimensional rotation reduction functions, avoiding frequent instrument changes during operation, significantly shortening operation time and reducing surgical complexity. The rotation drive device realizes the overall synchronous rotation of the entire operating arm system around the vertical axis, directly driving the vertebral body to slide and reduce anteriorly or posteriorly. The operation is intuitive and the torque transmission is efficient, greatly improving the probability of successful reduction in one attempt, while reducing excessive traction and damage to surrounding soft tissues.

[0020] 2. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis proposed in this invention provides valuable clearance space for adjacent blood vessels, nerves and other critical tissue structures by setting a connecting part, and reducing the risk of surgical collateral damage by setting a connecting part and its curved and extended shape; it has a certain elastic deformation capacity, which can play a buffering role when clamping the vertebral body, making the clamping force distribution more gentle and uniform, and reducing the possibility of stress concentration leading to vertebral fracture.

[0021] 3. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis proposed in this invention optimizes instrument function by setting the state of the support plate when closed. When the instrument is closed, the tight fit of the two friction parts makes the distal end of the instrument streamlined, which greatly facilitates passage and insertion in narrow and deep surgical channels and reduces tissue resistance.

[0022] 4. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis proposed in this invention significantly improves the mechanical interlocking ability between the reduction clamp and the vertebral body by incorporating a friction part. The arc-shaped surface ensures maximum contact and fit between the support plate and the irregular vertebral body surface, increasing stability and avoiding excessive local pressure that may be caused by point contact.

[0023] 5. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis proposed in this invention greatly increases the static friction of the contact surface by setting anti-slip particles, which can effectively resist slippage when rotational force is applied, ensuring that the reduction force is accurately transmitted to the vertebral body instead of being consumed in relative sliding, thereby greatly improving the reliability and safety of the reduction operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis according to the present invention;

[0026] Figure 2 This is one of the state diagrams of anterior lateral rotation reduction clamp for lumbar spondylolisthesis according to the present invention;

[0027] Figure 3 This is the second state diagram of a lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis according to the present invention.

[0028] In the figure, 10 is the first operating arm; 20 is the second operating arm; 30 is the gripping part; 40 is the rotary drive device; 501 is the connecting part; 502 is the friction part; 5021 is the anti-slip particle; 601 is the first connecting rod; 602 is the second connecting rod; 70 is the fixed toothed rod; 701 is the toothed groove; 702 is the limiting block; 801 is the first abutting part; 802 is the second abutting part. Detailed Implementation

[0029] The following is combined with Figures 1-3 The present invention will be described in detail below.

[0030] A type of lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis, such as Figure 1 As shown, including

[0031] The first operating arm 10 and the second operating arm 20 are hinged together, with their proximal ends forming a gripping part 30 and their distal ends extending to the surgical area.

[0032] A rotary drive device 40 is disposed at at least one location of the gripping portion 30, perpendicular to the operating plane formed by the relative movement of the first operating arm 10 and the second operating arm 20. Operating the rotary drive device 40 clockwise or counterclockwise rotates the operating plane synchronously, causing the vertebral body to slide forward or backward and reset.

[0033] Support plates are respectively disposed at the distal ends of the first operating arm 10 and the second operating arm 20, for contacting the surface of the vertebra and providing support.

[0034] The proximal ends of the first operating arm 10 and the second operating arm 20 together form a gripping part 30 for the doctor to hold, while the distal ends are designed as a slender structure to extend to the narrow lumbar surgery area, thereby achieving clamping or spreading of the vertebral body.

[0035] Specifically, the first manipulator 10 and the second manipulator 20 are rotatably connected by a hinge shaft located in their middle section. This hinge clearly divides each manipulator into a proximal gripping portion 30 and a distal functional portion. The physician controls the opening and closing of the distal functional portion by gripping and applying force to the gripping portion 30 with their fingers. A rotary drive device 40 is integrated into one of the gripping portions 30, and its rotational axis is strictly limited to a direction perpendicular to the plane of the opening and closing motion of the two manipulators. After the distal support plate of the reduction forceps has been stably applied to the vertebral body, the physician rotates this device. This rotational action is directly converted into a synchronous rotation of the entire distal working portion around the central axis, thereby guiding the vertebral body to the anatomical position in a controllable prying manner.

[0036] In this embodiment, the support plate includes a connecting part 501 and a friction part 502. The connecting part 501 extends in an S-shape along one side of the operating arm, and the friction part 502 is located at the end of the connecting part 501.

[0037] Specifically, the connecting part 501 starts from the distal end of the operating arm and extends to one side, forming an S-shaped structure with specific elasticity and clearance space. The friction part 502 is fixedly installed at the end of the connecting part 501. As a core component that directly contacts the vertebral surface, its material or surface treatment is designed to provide sufficient friction while minimizing additional damage to the tissue.

[0038] In this embodiment, the two support plates are arranged opposite to each other. When the first operating arm 10 and the second operating arm 20 are close to each other, the two friction parts 502 are in contact with each other, and a gap is formed between the two connecting plates.

[0039] Specifically, the two support plates are arranged in a relative manner. When the first operating arm 10 and the second operating arm 20 are driven to come close to each other to the minimum distance via the linkage device, the friction parts 502 on the two support plates can completely fit together to achieve a tight closed state, which facilitates the movement of instruments in the surgical field. At the same time, due to the special design of the connecting part 501, a certain gap is maintained between the two connecting parts 501. This gap provides space for soft tissue or blood clots that may exist during the operation, preventing clamping or interference.

[0040] In this embodiment, the opposite sides of the two friction parts 502 are arc-shaped surfaces, and the arc-shaped surfaces are provided with anti-slip particles 5021.

[0041] This embodiment focuses on optimizing the contact interface between the support plate and the vertebral body. On the surfaces of the two friction portions 502 that are opposite to each other (i.e., facing the respective vertebral bodies to be pushed), an arc-shaped surface adapted to the lateral contour of the vertebral body is constructed to increase the contact area and stability. To further prevent slippage during operation, anti-slip particles 5021 or a similar anti-slip texture structure are also provided on this arc-shaped surface, thereby significantly enhancing the reliability and safety of the repositioning operation.

[0042] In this embodiment, the rotary drive device 40 is a rotary grip, which is located at the proximal end of the first operating arm 10.

[0043] Specifically, the rotating handle allows doctors to perform rotational operations with their fingers while holding the grip part 30. Its compact structure and direct transmission conform to ergonomic principles, making it convenient to complete the rotational reset action with one or both hands.

[0044] This embodiment also includes a linkage device, which comprises a first link 601 and a second link 602. The middle portions of the first link 601 and the second link 602 are hinged to each other. The first link 601 and the second link 602 are respectively mounted on the first operating arm 10 and the second operating arm 20. Further, the rotation axes of the first link 601 and the second link 602 are coaxial with the rotation axes of the first operating arm 10 and the second operating arm 20.

[0045] The first link 601 and the second link 602 are hinged together to form an approximately "X"-shaped linkage device. The two ends of the first link 601 are connected to specific points on the first operating arm 10, and the same applies to the second link 602. The linkage device works in conjunction with the hinge points of the operating arm to amplify and convert the gripping force applied by the doctor to the holding part 30, making the opening and closing movement of the distal support plate more powerful and linearly controllable, especially suitable for scenarios requiring a large and stable clamping force on the vertebral body.

[0046] The connection points of the first link 601 and the second link 602 with the first operating arm 10 and the second operating arm 20, respectively, are set on the hinge axis of the operating arm itself. In other words, the rotation axis of the link and the hinge axis of the operating arm are coaxial. The coaxial arrangement simplifies the structure, reduces additional kinematic pairs, makes the force transmission path of the entire instrument more direct, and the movement more synchronized and stable, which helps to improve the overall rigidity and operating feel of the instrument.

[0047] In this embodiment, the end of the first operating arm 10 is provided with a fixed toothed bar 70, and the end of the fixed toothed bar 70 away from the first operating arm 10 is a free structure; the fixed toothed bar 70 is provided with continuously distributed toothed grooves 701, and a limiting block 702 is provided at the end of the second operating arm 20, and the limiting block 702 meshes with the toothed grooves 701.

[0048] Specifically, a forward-extending fixed toothed bar 70 is provided at the proximal end of the first operating arm 10, with the distal end of the toothed bar being a free end. The fixed toothed bar 70 is machined with continuously distributed toothed grooves 701. At the corresponding position at the proximal end of the second operating arm 20, a retaining block 702 that can be elastically pressed or released is installed. When the two operating arms move relative to each other to the desired position, the retaining block 702 engages with a specific toothed groove in the toothed groove 701, thereby locking the relative position of the operating arms, preventing accidental loosening during reset operations, and ensuring operational stability.

[0049] In this embodiment, the first operating arm 10 and the second operating arm 20 are respectively provided with a first abutting part 801 and abutting part 802. The first abutting part 801 and the second abutting part 802 contact each other when the gripping part 30 is closed, so as to limit the minimum distance.

[0050] Specifically, a first abutment portion 801 and a second abutment portion 802 are fixed to the inner sides of the gripping portions 30 of the first operating arm 10 and the second operating arm 20, respectively. When the gripping portions 30 are gripped to a preset minimum distance, they will contact each other and press firmly. This effectively prevents excessive pressure on the vertebral body from the distal support plate due to excessive gripping, or structural damage to the device itself, playing an important safety protection role.

[0051] In this embodiment, the operating arm and the gripping part 30 are integrally formed. This gives the entire structure higher strength, rigidity, and reliability, while reducing the risk of failure due to loose connections and facilitating cleaning and disinfection.

[0052] The present invention provides a lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis, the method of use of which is as follows:

[0053] like Figure 2-3As shown, after completing the routine lateral anterior lumbar spine exposure, the surgeon holds the grip 30 of the instrument and carefully inserts the distal ends of the two support plates, which are in a closed state, into the side of the target vertebral body along a safe anatomical gap. Subsequently, the surgeon manipulates the grip 30, driving the distal ends of the first and second operating arms 10 and 20 away from each other, so that the two support plates press against the target vertebral body and its adjacent vertebral bodies, or clamp a single vertebral body by bringing them closer together, thereby establishing stable support. Next, while maintaining the required clamping or dispersing force, the surgeon rotates the rotary drive device 40 located on the grip 30 clockwise or counterclockwise. This rotational action, through a transmission connection, drives the entire operating arm system and its distal support plates to rotate synchronously around an axis perpendicular to the operating plane. The rotational motion is transmitted to the vertebral body, which then pushes the target vertebral body forward or backward until it reaches the anatomical reduction position.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis, characterized in that, include The first and second operating arms are hinged together, with their proximal ends forming a gripping part and their distal ends extending to the surgical area. A rotary drive device, disposed at at least one location on the gripping portion, is perpendicular to the operating plane formed by the relative movement of the first and second operating arms. Operating the rotary drive device clockwise or counterclockwise rotates the operating plane synchronously, causing the vertebral body to slide forward or backward and reset. Support plates are respectively disposed at the distal ends of the first and second operating arms, for contacting the surface of the vertebral body and providing support.

2. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, The support plate includes a connecting part and a friction part. The connecting part extends in an S-shape along one side of the operating arm, and the friction part is located at the end of the connecting part.

3. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 2, characterized in that, The two support plates are arranged opposite each other. When the first operating arm and the second operating arm are close to each other, the two friction parts are in contact with each other, and a gap is formed between the two connecting plates.

4. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 2, characterized in that, The two friction parts have opposite sides that are arc-shaped, and the arc-shaped surfaces are provided with anti-slip particles.

5. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, The rotary drive device is a rotary grip, which is located at the proximal end of the first operating arm.

6. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, It also includes a linkage device, which includes a first link and a second link, the middle parts of the first link and the second link are hinged to each other, and the first link and the second link are respectively mounted on the first operating arm and the second operating arm.

7. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 6, characterized in that, The rotation axes of the first and second connecting rods are coaxial with the rotation axes of the first and second operating arms.

8. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, The first operating arm has a fixed toothed rod at its end, and the end of the fixed toothed rod away from the first operating arm is free. The fixed toothed rod has continuously distributed toothed grooves, and a limiting block is provided at the end of the second operating arm. The limiting block engages with the toothed grooves.

9. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, The first and second operating arms are respectively provided with a first abutting part and a second abutting part on their inner sides. The first abutting part and the second abutting part contact each other when the gripping part is closed to limit the minimum distance.

10. The lateral anterior approach rotation reduction clamp for lumbar spondylolisthesis as described in claim 1, characterized in that, The first and second manipulators are both integrally formed structures.

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