Laminectomy device

Abstract

The present invention provides a vertebral lamina distraction device. The vertebral lamina distraction device includes: a clamping mechanism, including a clamping portion for clamping or releasing a component to be installed; a conveying mechanism, including a fixed structure and a movable structure connected to the fixed structure, the clamping mechanism is connected to the fixed structure and is movably arranged relative to the fixed structure, the movable structure includes a connecting member that can be connected to a component to be implanted, and the movable structure is movably arranged relative to the fixed structure to drive the component to be implanted to move along a predetermined path. In the technical solution of the present invention, the vertebral lamina distraction device can accurately implant the component to be implanted into the vertebral lamina while distracting the vertebral lamina within a limited field of view and an operable range, thereby facilitating the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a vertebral plate distraction device. Background Art

[0002] The human spine includes the spinal canal structure, which can become narrow due to various reasons, such as developmental spinal stenosis, cervical spondylosis, herniated disc, ossification of the posterior longitudinal ligament, hypertrophy of the ligamentum flavum, etc. If spinal stenosis occurs, it will compress the spinal cord and cause symptoms such as axial pain, pain and numbness in the limbs, muscle weakness and even paralysis, which will seriously affect people's daily lives.

[0003] Open-door laminoplasty (for example, double-door laminoplasty or half-open-door laminoplasty) is a commonly used surgical method for expanding the spinal canal. In spinal laminoplasty, common surgical methods include "single-door" or "double-door". In existing single-door surgeries, the vertebral lamina distraction step is usually performed using a unilateral incision method, and the vertebral lamina is opened using simple tools such as tweezers and hooks. In single-door surgeries, the muscles and ligaments attached to the spinous processes are often stripped more thoroughly, so there is a larger operating space during the operation, and precise distraction is not required. Therefore, simple tools such as tweezers and hooks are sufficient to satisfy the distraction and maintenance of the vertebral lamina in this type of surgery. However, sometimes it is necessary to perform bilateral suturing of the lamina, expand the gap to elevate the spinous process, and add artificial bone or substitute filling blocks into the gap and fix it with bone plates, commonly known as "lifting". In this operation, the spinous process cannot be expanded perpendicular to the incision surface, but the spinous process part is required to be expanded posteriorly perpendicular to the coronal plane of the human body. In addition, this operation is different from traditional laminoplasty, and it does not require the stripping of the muscles and ligaments attached to the spinous process. It only requires the implantation of artificial lamina prosthesis with a small incision on each side. However, during this operation, visual The field of view and the range of operation are very limited, and the muscle ligaments attached to the spinous processes often have a certain resistance to the expansion of the vertebral lamina during the expansion process; therefore, the expansion tools used in the above-mentioned single-door, in the "top lifting operation", are difficult to expand the vertebral lamina in a posterior direction perpendicular to the coronal plane of the human body due to the limited field of view, and due to the resistance of the muscle ligaments attached to the spinous processes, it is also difficult to achieve a firm expansion of the vertebral lamina and maintain it after expansion, and it is even more difficult to achieve the precise implantation of an artificial vertebral lamina prosthesis during expansion.

[0004] Currently, in the "lifting operation", the clamping mechanism for expanding the vertebral lamina and the conveying mechanism for clamping the implant are two separate and independent mechanisms. The implantation of the implant into the vertebral lamina needs to be performed when the vertebral lamina is in the expanded state. However, due to the very limited field of view and operable range during the operation, it is difficult to expand the vertebral lamina and accurately implant the implant into the vertebral lamina within the limited field of view and operable range, resulting in inconvenience in the operation. Summary of the invention

[0005] The main purpose of the present invention is to provide a vertebral lamina distraction device, which can accurately implant the implanted component into the vertebral lamina while distracting the vertebral lamina within a limited field of view and operable range, thereby facilitating the operation.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a vertebral plate distraction device, including: a clamping mechanism, including a clamping portion for clamping or releasing a component to be installed; a conveying mechanism, including a fixed structure and a movable structure connected to the fixed structure, the clamping mechanism is connected to the fixed structure and is movably arranged relative to the fixed structure, the movable structure includes a connecting member that can be connected to the component to be implanted, and the movable structure is movably arranged relative to the fixed structure to drive the component to be implanted to move along a predetermined path.

[0007] Furthermore, the fixed structure includes a first plate body connected to the clamping mechanism and a second plate body connected to the first plate body, and the movable structure is connected to the second plate body and is movably arranged relative to the second plate body.

[0008] Furthermore, the fixed structure includes two second plates spaced apart along the first direction, the two second plates are connected to the first plate, and a direction in which the movable structure moves relative to the second plates has an angle with the first direction.

[0009] Furthermore, a guide groove is provided on the second plate body, and the movable structure is movably arranged along the guide groove under the action of its own gravity.

[0010] Further, the guide groove includes a first groove section and a second groove section connected to the first groove section, and there is an angle between the central axis of the first groove section and the central axis of the second groove section; or, the second plate body includes a first plate section connected to the first plate body and a second plate section connected to the first plate section, and the first plate section and the second plate section are arranged at an angle.

[0011] Furthermore, the connecting member includes a connecting plate connected to the fixing structure and a fixing piece connected to the connecting plate. The fixing piece is rotatably arranged relative to the connecting plate, and the fixing piece is used to connect or release the implant.

[0012] Furthermore, at least part of the outer wall surface of the fixing piece is provided with an external thread so that the fixing piece can cooperate with the thread of the implanted part; or, the movable structure also includes a locking piece connected to the connecting plate to lock the connecting plate on the fixing structure.

[0013] Furthermore, the lamina distraction device further comprises a driving mechanism, the clamping mechanism is connected to the fixing structure via the driving mechanism, and at least a part of the driving mechanism is movably arranged relative to the fixing structure.

[0014] Furthermore, the driving mechanism includes: a support seat, through which the clamping mechanism is connected to the fixed structure; a rack, which is arranged on the fixed structure; a gear, which is arranged on the support seat and rotatably arranged relative to the support seat, and the gear is meshed with the rack to drive the support seat and the clamping mechanism to move.

[0015] Furthermore, the driving mechanism also includes: an elastic member, one end of which is connected to the support seat, and the other end of which is engaged with the rack; or a knob, which is connected to the gear and is rotatably arranged relative to the support seat.

[0016] Furthermore, the clamping mechanism also includes an adjusting structure, a first clamping arm and a second clamping arm pivotally connected to the first clamping arm, the first clamping arm and the second clamping arm both have a first end and a second end arranged opposite to each other, the first end of the first clamping arm and the first end of the second clamping arm are both connected to the adjusting structure, the second end of the first clamping arm and the second end of the second clamping arm approach or move away from each other to form a clamping portion, and the adjusting structure is used to adjust the distance between the second end of the first clamping arm and the second end of the second clamping arm.

[0017] Furthermore, the adjustment structure includes a first connecting rod and an adjusting member connected to the first connecting rod, the first clamping arm and the second clamping arm are both connected to the first connecting rod, the adjusting member is located on a side of the first clamping arm away from the second clamping arm, and the adjusting member and the first clamping arm are both movably arranged relative to the first connecting rod.

[0018] Furthermore, a through hole is provided on the first clamping arm, one end of the first connecting rod is pivotally connected to the second clamping arm, and the other end of the first connecting rod passes through the through hole and is connected to the adjusting member; or, an external thread is provided on at least part of the outer wall surface of the first connecting rod, the adjusting member is a nut, and the adjusting member is threadedly connected to the first connecting rod; or, the adjusting structure also includes a limiting member connected to the first connecting rod, and the adjusting member is located between the limiting member and the first clamping arm.

[0019] Furthermore, the second end of the first clamping arm and the second end of the second clamping arm are both bent toward a side away from the conveying mechanism.

[0020] By applying the technical solution of the present invention, the clamping mechanism and the conveying mechanism are connected to form an integrated structure, the clamping mechanism is used to open the vertebral plate, the fixed structure is used to support the clamping mechanism and the movable structure, and the movable structure is used to connect and convey the implant, so that the implant can move along a predetermined path to the opened vertebral plate. Under the action of external force, the movable structure releases the implant, thereby achieving accurate implantation of the implant. That is to say, the clamping mechanism and the conveying mechanism are a whole. When the vertebral lamina is stretched open by the clamping mechanism, the implant can be connected and conveyed to the stretched vertebral lamina through the movable structure, and then the movable structure can be released by external force to accurately implant the implant into the stretched vertebral lamina, thereby achieving the purpose of accurately implanting the implant into the vertebral lamina while stretching the vertebral lamina; the clamping mechanism is connected to the movable structure through the fixed structure, and the purpose of stretching the vertebral lamina can be achieved by moving the clamping mechanism relative to the fixed structure, and the purpose of conveying the implant to the stretched vertebral lamina can be achieved by moving the movable structure relative to the fixed structure. Therefore, the vertebral lamina stretching device of the present application has lower requirements on the field of view and the operable range; in summary, the vertebral lamina stretching device of the present application can achieve the purpose of accurately implanting the implant into the vertebral lamina while stretching the vertebral lamina within a limited field of view and an operable range, thereby facilitating the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic structural diagram of an embodiment of a lamina distraction device according to the present invention is shown;

[0023] Figure 2 Shows Figure 1 A side view of the lamina distraction device;

[0024] Figure 3 Shows Figure 1 A schematic structural diagram of the vertebral plate distraction device from another angle;

[0025] Figure 4 Shows Figure 1 A schematic diagram of the structure of the clamping mechanism of the lamina distraction device;

[0026] Figure 5 Shows Figure 4 A side view of a clamping mechanism;

[0027] Figure 6 Shows Figure 1 A schematic diagram of the structure of the conveying mechanism and the driving mechanism of the vertebral lamina distraction device (at this time, the implant to be implanted is installed);

[0028] Figure 7 Shows Figure 6 A partial cross-sectional view of

[0029] Figure 8 Shows Figure 6 A structural diagram of the active structure of the conveying mechanism;

[0030] Fig. 9 Shows Figure 8 A schematic diagram of the structure from another angle;

[0031] Fig.10 Shows the Figure 1 A schematic diagram of the structure of the vertebral lamina distraction device applied to the vertebral lamina (wherein the clamping part clamps the implanted component);

[0032] Fig.11 Shows Fig.10 Another structural schematic diagram of (wherein the clamping mechanism opens the vertebral plate);

[0033] Fig.12 Shows Fig.11 Another structural schematic diagram of (wherein, the implant is located at the expanded vertebral plate);

[0034] Fig.13 Shows Fig.12 a side view of

[0035] Fig.14 A schematic diagram of the structure of the implant to be installed on the vertebral plate is shown.

[0036] The above drawings include the following reference numerals:

[0037] 10. Clamping mechanism; 11. Clamping part; 12. Adjusting structure; 13. First clamping arm; 14. Second clamping arm; 15. First connecting rod; 16. Adjusting member; 17. Limiting member; 20. Part to be installed; 21. Vertebral plate part; 22. Vertebral body part; 30. Conveying mechanism; 31. Fixing structure; 32. Movable structure; 33. Connecting member; 34. First plate body; 35. Second plate body; 351. First plate section; 352. Second plate section; 36. Guide groove; 361. First groove section; 362. Second groove section; 37. Connecting plate; 38. Fixing member; 39. Locking member; 40. Part to be implanted; 50. Driving mechanism; 51. Support seat; 52. Rack; 53. Gear; 54. Elastic member; 55. Knob. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0040] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0041] The current clamping mechanism and conveying mechanism are two independent mechanisms. Since the field of view and the operable range during the "lifting operation" are very limited, it is difficult to accurately implant the implant into the vertebral lamina while expanding the vertebral lamina within the limited field of view and the operable range, causing surgical inconvenience. The present invention and the embodiments of the present invention provide a vertebral lamina expansion device.

[0042] It should be noted that, in the present invention and the embodiments of the present invention, the component 20 to be installed is a vertebral lamina (the vertebral lamina includes a vertebral lamina portion 21 and a vertebral body portion 22), and the component 40 to be implanted is an artificial vertebral lamina prosthesis.

[0043] like Figures 1 to 3 As shown, in an embodiment of the present invention, the lamina distraction device includes a clamping mechanism 10 and a conveying mechanism 30, the clamping mechanism 10 includes a clamping portion 11 for clamping or loosening a component 20 to be installed; the conveying mechanism 30 includes a fixed structure 31 and a movable structure 32 connected to the fixed structure 31, the clamping mechanism 10 is connected to the fixed structure 31 and is movably arranged relative to the fixed structure 31, the movable structure 32 includes a connecting member 33 that can be connected to a component 40 to be implanted, and the movable structure 32 is movably arranged relative to the fixed structure 31 to drive the component 40 to be implanted to move along a predetermined path.

[0044] In the above arrangement, the clamping mechanism 10 and the conveying mechanism 30 are connected to form an integrated structure, the clamping mechanism 10 is used to open the vertebral plates, the fixed structure 31 is used to support the clamping mechanism 10 and the movable structure 32, and the movable structure 32 is used to connect and convey the implant 40, so that the implant 40 can move along a predetermined path to the opened vertebral plates. Under the action of external force, the movable structure 32 releases the implant 40, thereby achieving accurate implantation of the implant 40.

[0045] That is to say, the clamping mechanism 10 and the conveying mechanism 30 are a whole. When the vertebral lamina is stretched open by the clamping mechanism 10, the implant 40 can be connected and conveyed to the stretched vertebral lamina through the movable structure 32, and then the movable structure 32 is released by external force to accurately implant the implant 40 into the stretched vertebral lamina, thereby achieving the purpose of accurately implanting the implant 40 into the vertebral lamina while stretching the vertebral lamina; the clamping mechanism 10 is connected to the movable structure 32 through the fixed structure 31. Since the purpose of stretching the vertebral lamina can be achieved by moving the clamping mechanism 10 relative to the fixed structure 31, and the purpose of conveying the implant 40 to the stretched vertebral lamina can be achieved by moving the movable structure 32 relative to the fixed structure 31, the vertebral lamina stretching device of the present application has lower requirements on the field of view and the operable range; in summary, the vertebral lamina stretching device of the present application can achieve the purpose of accurately implanting the implant into the vertebral lamina while stretching the vertebral lamina within a limited field of view and an operable range, thereby facilitating the operation.

[0046] Specifically, the clamping portion 11 clamps the vertebral plate portion 21 of the component to be installed 20, and the clamping mechanism 10 moves relative to the fixing structure 31, so that the clamping portion 11 drives the vertebral plate portion 21 away from the vertebral body portion 22, thereby achieving the purpose of opening the vertebral plate by the clamping mechanism 10; the connecting member 33 connects or releases the component to be implanted 40; when the component to be implanted 40 is implanted into the vertebral plate, the clamping portion 11 releases the component to be installed 20, and the connecting member 33 releases the component to be implanted 40, and the vertebral plate expansion device can be taken out.

[0047] It should be noted that the above-mentioned predetermined path refers to a movement path that enables the movable structure 32 to move relative to the fixed structure 31, so that the movable structure 32 is close to or away from the clamping part 11, that is, the movable structure 32 can move with the implanted component 40 in the direction close to the clamping part 11, so that the implanted component 40 moves to the part to be installed 20 clamped by the clamping part 11; in the embodiment of the present invention, the movable structure 32 moves relative to the fixed structure 31 along the guide groove 36, and therefore, the movement path defined by the guide groove 36 forms the above-mentioned predetermined path, and the movable structure 32 moves with the implanted component 40 along the guide groove 36, so that the implanted component 40 can move to the part to be installed 20 (that is, the expanded vertebral plate), thereby achieving the purpose of implanting the implanted component 40.

[0048] In the technical solution of the present application, the lamina distraction device can distract the gap and move the spinous process vertically backward within a limited field of view and operating range, thereby achieving the purpose of expanding the intervertebral foramen, and can effectively maintain the distracted position of the spinous process part, so that the artificial lamina prosthesis can be accurately implanted in the gap at the same time.

[0049] In a vertebral lamina distraction device known to the inventor for "lifting the top", the vertebral lamina distraction device relies on the front part of the distraction claw and the supporting claw to be close together for jointly extending into the side incision of the vertebral lamina. By tightly gripping the handle, the upper claw of the distraction claw can be distracted to achieve the effect of lifting and distracting the incision. This tool can achieve effective and stable distraction of the vertebral lamina during the "lifting top" operation.

[0050] Although the tool can achieve a firm distraction of the vertebral lamina, the tool can only achieve the distraction of the vertebral lamina. After using the tool, additional tools are often needed to effectively support the distracted vertebral lamina and clamp the artificial vertebral lamina prosthesis for implantation. In other words, the vertebral lamina distraction device cannot achieve the function of simultaneously distracting and implanting an artificial vertebral lamina prosthesis. When using the tool to implant an artificial vertebral lamina prosthesis, it is often necessary for multiple medical personnel to work together and use multiple tools to implant the prosthesis, and it is often difficult to accurately implant the prosthesis into the expected position. The postoperative vertebral lamina distraction effect is often not ideal. Compared with the above-mentioned technology, the vertebral lamina distraction device of the present application can achieve the artificial vertebral lamina prosthesis (i.e., the implant 40). Precise and easy implantation, and the vertebral plate distraction device of the present application also includes a clamping mechanism 10 and a conveying mechanism 30. When using the vertebral plate distraction device of the present application, one hand operates the clamping mechanism 10 to achieve the distraction function, and the other hand operates the conveying mechanism 30. The conveying mechanism 30 conveys the implant 40 to the distracted vertebral plate and releases the implant 40. The vertebral plate distraction device of the present application can accurately implant the implant 40 while achieving distraction and maintaining the distracted state, thereby ensuring the efficiency and effect of the operation. Moreover, through the vertebral plate distraction device of the present application, a single person can complete the distraction action and the implantation action without the cooperation of multiple people, which can save medical resources, improve utilization, simplify the operation process, and facilitate the operation.

[0051] "Lifting the top" is a relatively new vertebral laminoplasty in recent years. Because it can effectively protect the muscles and ligaments of the human body during the operation, and can effectively prevent the occurrence of the "re-closing" phenomenon of the open vertebral lamina after the operation, and can maintain the physiological morphology of the human cervical spine, this surgical method has a broad market development prospect. However, if the existing tools on the market are used for operation, it often has the disadvantages of not being simple enough and cumbersome to operate, and it is difficult to achieve the precise implantation of the artificial vertebral lamina prosthesis in this procedure (i.e., surgical method), so that the anatomical morphology cannot be accurately restored and the mechanical model cannot be stabilized after the operation. These shortcomings make the learning curve of this procedure long and the learning difficulty is relatively large, which greatly limits the promotion of this procedure. In the technical solution of the present application, the vertebral lamina distraction device can simplify the operation and can achieve the precise implantation of the artificial vertebral lamina prosthesis. It greatly reduces the learning time while ensuring the surgical effect, and clears an obstacle for the promotion of this procedure.

[0052] like Figures 1 to 3 , Figure 6and Figure 7 As shown, in the embodiment of the present invention, the fixed structure 31 includes a first plate 34 connected to the clamping mechanism 10 and a second plate 35 connected to the first plate 34 , and the movable structure 32 is connected to the second plate 35 and is movably arranged relative to the second plate 35 .

[0053] In the above arrangement, the fixed structure 31 supports the clamping mechanism 10 and the movable structure 32, the clamping mechanism 10 is connected to the first plate body 34 and is movable relative to the first plate body 34, and the movable structure 32 is connected to the second plate body 35 and is movable relative to the second plate body 35. Through the above arrangement, mutual interference between the clamping mechanism 10 and the movable structure 32 can be avoided, ensuring that both the clamping mechanism 10 and the movable structure 32 can move smoothly.

[0054] like Figure 1 and Figure 7 As shown, in the embodiment of the present invention, the fixed structure 31 includes two second plates 35 spaced apart along a first direction, the two second plates 35 are connected to the first plate 34, and an angle is formed between the first direction and the direction in which the movable structure 32 moves relative to the second plate 35. In the above arrangement, the movable structure 32 is movable relative to the second plate 35, and by providing two second plates 35, the stability of the movement of the movable structure 32 can be improved.

[0055] Preferably, in an embodiment of the present invention, the first direction is perpendicular to a direction in which the movable structure moves relative to the second plate.

[0056] like Figure 1 , Figure 2 and Figure 6 As shown, in the embodiment of the present invention, the second plate body 35 is provided with a guide groove 36, and under the action of its own gravity, the movable structure 32 is movably arranged along the guide groove 36. By providing the guide groove 36 on the second plate body 35, the purpose of movably arranging the movable structure 32 along the guide groove 36 relative to the second plate body 35 is achieved, so that the movable structure 32 can move along the guide groove 36 to the expanded vertebral plate.

[0057] Preferably, in the embodiment of the present invention, guide grooves 36 are provided on both second plates 35 to improve the stability of the movement of the movable structure 32. Of course, in alternative embodiments not shown in the drawings of the present application, other guiding structures can be provided on the second plates 35 according to actual needs to guide the movable structure 32, such as linear guide rails.

[0058] like Figure 8 and Fig. 9As shown, in the embodiment of the present invention, the connecting member 33 includes a connecting plate 37 connected to the fixing structure 31 and a fixing member 38 connected to the connecting plate 37. The fixing member 38 is rotatably arranged relative to the connecting plate 37 and is used to connect or release the implant 40.

[0059] In the above arrangement, the connecting plate 37 supports the fixing member 38, and the fixing member 38 can be connected to or release the member 40 to be implanted, so that the movable structure 32 can connect, transport or release the member 40 to be implanted, thereby achieving the purpose of the vertebral plate distraction device implanting the member 40 to be implanted into the vertebral plate; the fixing member 38 rotates relative to the connecting plate 37 to achieve the purpose of connecting the fixing member 38 to or releasing the member 40 to be implanted.

[0060] Preferably, in the embodiment of the present invention, at least part of the outer wall surface of the fixing member 38 is provided with an external thread, so that the fixing member 38 is threadedly matched with the implanted member 40. The implanted member 40 is provided with a mounting hole, and the fixing member 38 is threadedly matched with the implanted member 40 through the external thread on its outer surface. By screwing the fixing member 38, the fixing member 38 can be connected or disconnected from the implanted member 40, thereby achieving the purpose of connecting or releasing the implanted member 40 through the fixing member 38.

[0061] like Figure 1 , Figure 2 and Figures 6 to 9 As shown, in the embodiment of the present invention, the movable structure 32 further includes a locking member 39 connected to the connecting plate 37 to lock the connecting plate 37 on the fixed structure 31. The locking member 39 is connected and matched with the connecting plate 37, so as to achieve the purpose of locking the connecting plate 37 on the fixed structure 31. Specifically, the locking member 39 is inserted into the guide groove 36, and one end of the locking member 39 is threadedly matched with the connecting plate 37 after passing through the guide groove 36. By screwing the locking member 39, the other end of the locking member 39 can be moved close to or away from the connecting plate 37. When the locking member 39 is close to the connecting plate 37, the locking member 39 can lock the connecting plate 37 on the fixed structure 31, and the relative position of the movable structure 32 and the fixed structure 31 is fixed. When the locking member 39 is away from the connecting plate 37, the locking member 39 does not lock the connecting plate 37, and the movable structure 32 is movable relative to the fixed structure 31.

[0062] like Figures 1 to 3As shown, in an embodiment of the present invention, the lamina distraction device further includes a driving mechanism 50, the clamping mechanism 10 is connected to the fixed structure 31 through the driving mechanism 50, and at least a portion of the driving mechanism 50 is movably arranged relative to the fixed structure 31. The clamping mechanism 10 and the fixed structure 31 are both connected to the driving mechanism 50, the fixed structure 31 supports the clamping mechanism 10 and the driving mechanism 50, at least a portion of the driving mechanism 50 moves relative to the fixed structure 31, and can drive the clamping mechanism 10 to move relative to the fixed structure 31. Driven by the driving mechanism 50, the purpose of movably arranging the clamping mechanism 10 relative to the fixed structure 31 can be achieved.

[0063] like Figure 6 and Figure 7 As shown, in an embodiment of the present invention, the driving mechanism 50 includes a support base 51, a rack 52 and a gear 53, and the clamping mechanism 10 is connected to the fixed structure 31 through the support base 51; the rack 52 is arranged on the fixed structure 31; the gear 53 is arranged on the support base 51 and is rotatable relative to the support base 51, and the gear 53 is engaged with the rack 52 to drive the support base 51 and the clamping mechanism 10 to move.

[0064] In the above arrangement, the clamping mechanism 10 is connected to the support seat 51, the gear 53 on the support seat 51 is meshed with the rack 52 on the fixed structure 31, the gear 53 can move along the rack 52, and driven by the gear 53, the support seat 51 and the clamping mechanism 10 both move relative to the fixed structure 31, thereby achieving the purpose of making the clamping mechanism 10 movable relative to the fixed structure 31 through the driving mechanism 50.

[0065] Preferably, in the embodiment of the present invention, the rack 52 is disposed on the first plate 34. Preferably, the gear 53 is a ratchet.

[0066] like Figure 1 and Figure 7 As shown, in the embodiment of the present invention, the driving mechanism 50 further includes an elastic member 54, one end of the elastic member 54 is connected to the support seat 51, and the other end of the elastic member 54 is engaged with the rack 52. The support seat 51 and the rack 52 are both connected to the elastic member 54, and the relative position of the support seat 51 and the rack 52 can be fixed by the engagement between the elastic member 54 and the rack 52, so that the relative position of the clamping mechanism 10 and the fixed structure 31 is fixed, and the clamping mechanism 10 is kept in a moving position relative to the fixed structure 31, that is, the clamping portion 11 can clamp the component 20 to be installed and keep it in an open position.

[0067] Preferably, the elastic member 54 is a spring sheet.

[0068] like Figure 1 and Figure 6As shown, in the embodiment of the present invention, the driving mechanism 50 further includes a knob 55 connected to the gear 53, and the knob 55 is rotatably arranged relative to the support base 51. The gear 53 can be conveniently operated by applying an external force to the knob 55 to rotate the gear 53. By setting the knob 55, the purpose of moving the clamping mechanism 10 relative to the fixed structure 31 can be easily achieved.

[0069] Preferably, in an embodiment of the present invention, the support seat 51 has a accommodating cavity, and the gear 53 and at least part of the rack 52 are located in the accommodating cavity, so that the gear 53 and at least part of the rack 52 are not exposed, which is safe and can protect the gear 53 and the rack 52. The knob 55 is located outside the support seat 51 for easy operation.

[0070] like Figure 1 , Figures 3 to 5 As shown, in the embodiment of the present invention, the clamping mechanism 10 also includes an adjusting structure 12, a first clamping arm 13 and a second clamping arm 14 pivotally connected to the first clamping arm 13, the first clamping arm 13 and the second clamping arm 14 both have a first end and a second end that are relatively arranged, the first end of the first clamping arm 13 and the first end of the second clamping arm 14 are both connected to the adjusting structure 12, the second end of the first clamping arm 13 and the second end of the second clamping arm 14 are close to or away from each other to form a clamping portion 11, and the adjusting structure 12 is used to adjust the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14.

[0071] In the above arrangement, the second end of the first clamping arm 13 and the second end of the second clamping arm 14 cooperate to form the clamping portion 11. The second end of the first clamping arm 13 and the second end of the second clamping arm 14 can be moved closer to each other to clamp the component 20 to be installed, or can be moved away from each other to release the component 20 to be installed. The adjustment structure 12 can adjust the distance between the first end of the first clamping arm 13 and the first end of the second clamping arm 14. Since the first clamping arm 13 and the second clamping arm 14 are pivotally connected, the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 can be adjusted by the adjustment structure 12, so that the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 is adapted to the size of the component 20 to be installed, so that the clamping portion 11 can clamp the component 20 to be installed more stably and firmly.

[0072] Preferably, in the embodiment of the present invention, the first clamping arm 13 is pivotally connected to the second clamping arm 14 via a rotating shaft, and the support seat 51 is connected to the rotating shaft, thereby achieving the purpose of connecting the clamping mechanism 10 to the support seat 51. Preferably, the rotating shaft and the support seat 51 are threadedly connected.

[0073] like Figure 1 , Figure 3 and Figure 4As shown, in an embodiment of the present invention, the adjustment structure 12 includes a first connecting rod 15 and an adjustment member 16 connected to the first connecting rod 15, the first clamping arm 13 and the second clamping arm 14 are both connected to the first connecting rod 15, the adjustment member 16 is located on a side of the first clamping arm 13 away from the second clamping arm 14, and the adjustment member 16 and the first clamping arm 13 are both movably arranged relative to the first connecting rod 15.

[0074] In the above arrangement, the second clamping arm 14 is connected to the first clamping arm 13 through the first connecting rod 15. Since the first clamping arm 13 is movable relative to the first connecting rod 15, the first end of the first clamping arm 13 can be closer to or farther away from the first end of the second clamping arm 14, that is, the distance between the first end of the first clamping arm 13 and the first end of the second clamping arm 14 is adjustable; the adjusting member 16 is movable relative to the first connecting rod 15, and the extreme position of the first end of the first clamping arm 13 away from the first end of the second clamping arm 14 can be limited by the adjusting member 16, thereby achieving the purpose of adjusting the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 through the adjusting structure 12.

[0075] Preferably, in the embodiment of the present invention, a through hole is provided on the first clamping arm 13, one end of the first connecting rod 15 is pivotally connected to the second clamping arm 14, and the other end of the first connecting rod 15 passes through the through hole and is connected to the adjusting member 16. The first connecting rod 15 passes through the through hole on the first clamping arm 13, so that the first clamping arm 13 is movable relative to the first connecting rod 15; since the connection point between the first connecting rod 15 and the second clamping arm 14 is fixed, therefore, in order to ensure that the first clamping arm 13 is movable relative to the first connecting rod 15, the first connecting rod 15 needs to be arranged to be pivotally connected to the second clamping arm 14.

[0076] like Figure 4 As shown, in the embodiment of the present invention, at least part of the outer wall surface of the first connecting rod 15 is provided with an external thread, and the adjusting member 16 is a nut, and the adjusting member 16 is threadedly connected to the first connecting rod 15. The first connecting rod 15 and the adjusting member 16 are threadedly matched, and the adjusting member 16 can be moved relative to the first connecting rod 15 by screwing the adjusting member 16, so as to limit the extreme position of the first end of the first clamping arm 13 away from the first end of the second clamping arm 14, so as to achieve the purpose of adjusting the distance between the second end of the first clamping arm 13 and the second end of the second clamping arm 14 through the adjusting structure 12.

[0077] like Figure 1 , Figure 3 and Figure 4As shown, in the embodiment of the present invention, the adjustment structure 12 further includes a limiter 17 connected to the first connecting rod 15, and the adjustment member 16 is located between the limiter 17 and the first clamping arm 13. The limiter 17 is located on the side of the adjustment member 16 away from the first clamping arm 13, and the limiter 17 can limit the limit position of the adjustment member 16 relative to the first connecting rod 15, thereby limiting the limit position of the first end of the first clamping arm 13 away from the first end of the second clamping arm 14.

[0078] Preferably, the limiting member 17 is integrally formed with the first connecting rod 15. Of course, in an alternative embodiment of the present application, the limiting member 17 and the first connecting rod 15 may be separately formed.

[0079] like Figure 1 and Figure 5 As shown, in the embodiment of the present invention, the second end of the first clamping arm 13 and the second end of the second clamping arm 14 are bent toward a side away from the conveying mechanism 30. The second end of the first clamping arm 13 and the second end of the second clamping arm 14 cooperate to form the clamping portion 11. Through the above arrangement, the clamping portion 11 can clamp the component 20 to be installed more conveniently and easily.

[0080] like Figure 1 , Figure 2 and Figure 6 As shown, in the embodiment of the present invention, the guide groove 36 includes a first groove section 361 and a second groove section 362 connected to the first groove section 361, and an angle is formed between the central axis of the first groove section 361 and the central axis of the second groove section 362. The second groove section 362 is bent relative to the first groove section 361 toward the side where the clamping mechanism 10 is located, and the implant 40 moves toward the expanded vertebral plate along the first groove section 361 and the second groove section 362 in sequence. Through the above arrangement, on the one hand, the movement of the implant 40 can be buffered to avoid impact, and on the other hand, the accuracy of implantation of the implant 40 can be improved, so that the implant 40 is more closely fitted with the vertebral plate, thereby improving the implantation effect.

[0081] like Figure 1 , Figure 2 and Figure 6As shown, in the embodiment of the present invention, the second plate body 35 includes a first plate segment 351 connected to the first plate body 34 and a second plate segment 352 connected to the first plate segment 351, the first plate segment 351 and the second plate segment 352 are arranged at an angle, the first slot segment 361 is arranged on the first plate segment 351, and the second slot segment 362 is arranged on the second plate segment 352. The second plate segment 352 is bent relative to the first plate segment 351 toward the side where the clamping mechanism 10 is located, and such an arrangement can make the shape of the second plate body 35 adapt to the shape of the clamping portion 11, on the one hand, it is convenient to arrange the first slot segment 361 and the second slot segment 362, and on the other hand, it can improve the accuracy of implantation of the implant 40 to be implanted, so that the implant 40 to be implanted is more closely fitted with the vertebral plate, and the implantation effect is improved.

[0082] like Figure 1 , Figures 10 to 14 As shown, in the embodiment of the present invention, the vertebral plate distraction device includes a clamping mechanism 10 and a conveying mechanism 30, the clamping mechanism 10 is connected to the conveying mechanism 30 through a driving mechanism 50, the clamping mechanism 10 includes an adjusting structure 12, a first clamping arm 13 and a second clamping arm 14, the first clamping arm 13 is pivotally connected to the second clamping arm 14 through a rotating shaft, the rotating shaft is threadedly connected to a support seat 51 of the driving mechanism 50, so as to realize the connection between the clamping mechanism 10 and the driving mechanism 50, the adjusting structure 12 includes a first connecting rod 15 connected to both the first clamping arm 13 and the second clamping arm 14, an adjusting member 16 connected to the first connecting rod 15 and a limiting member 17 connected to the first connecting rod 15, the vertebral plate can be clamped by pinching the first clamping arm 13 and the second clamping arm 14, and the adjusting member 16 can be used to So that the first clamping arm 13 and the second clamping arm 14 are maintained in the clamping position, and the clamping mechanism 10 maintains the state of clamping the component to be installed 20; by screwing the knob 55, the gear 53 can be driven to rotate, the gear 53 is meshed with the rack 52, the gear 53 can move along the rack 52, the gear 53 drives the support seat 51 and the clamping mechanism 10 to move relative to the fixed structure 31, so that the clamping mechanism 10 drives the vertebral plate part 21 to move in the direction away from the vertebral body part 22, thereby achieving the purpose of opening the vertebral plate by the clamping mechanism 10; the movable structure 32 is connected to the artificial vertebral plate prosthesis, the movable structure 32 moves relative to the fixed structure 31, thereby driving the artificial vertebral plate prosthesis to move to the opened vertebral plate, and the movable structure 32 is used to fix the artificial vertebral plate prosthesis, thereby achieving accurate implantation of the artificial vertebral plate prosthesis.

[0083] like Figure 1 , Figures 10 to 14As shown, in the embodiment of the present invention, when using the vertebral plate distraction device, the vertebral plates on both sides of the vertebral plate need to be cut off in advance, so that the entire vertebral plate and the spinous process are in a free state. The use is divided into three stages. The first stage is the placement stage, in which the clamping mechanism is connected to the conveying mechanism through the driving mechanism, and the upper and lower sides of the vertebral plate are clamped by the first clamping arm and the second clamping arm of the clamping mechanism. The fixing structure is placed on the side blocks of the vertebral plate, and temporarily fixed by the pointed part at the bottom of the fixing structure. It is necessary to ensure that the vertebral plate distraction device is placed vertically on the coronal plane. After the whole set of vertebral plate distraction device is placed, the adjusting part is rotated so that the clamping part can effectively clamp the free vertebral plate; the second stage is the lifting stage, in which the prosthesis is connected to the artificial vertebral plate prosthesis by screwing the fixing part into the threaded hole, and the connecting member is fixed. The prosthesis is fixed to the upper end of the second plate body by tightening the locking piece, and the knob of the driving mechanism is rotated. The ratchet slides upward along the rack on the first plate body, and the spring piece can play the role of fixing after rotation, driving the support seat and the clamping mechanism to move upward as a whole, and stop when they move to a suitable position; the third stage is the implantation stage. After the top lifting is completed, the locking piece is loosened to allow the connecting member and the artificial vertebral plate prosthesis to slide along the guide groove to the interval after the vertebral plate is lifted, the fixing piece is loosened, and the screws matching the artificial vertebral plate prosthesis are screwed in to fix the artificial vertebral plate prosthesis to the expanded vertebral plate, after which the vertebral plate expansion device can be evacuated.

[0084] The distance between the two second plates is 10 mm to 14 mm (preferably 12 mm), which can allow the insertion of conventional artificial vertebral lamina prostheses (about 10 mm). When the knob is rotated, the gear drives the clamping mechanism to slide upward, thereby driving the vertebral lamina part to be pushed upward relative to the vertebral body part. The distance of the vertebral lamina being pushed open is controlled by controlling the force of rotation, and the normal lifting distance is 6 mm to 8 mm; the lifting height is 0.5 mm for every rotation of the ratchet by 1 grid, and the lifting height can be controlled by controlling the number of grids rotated by the ratchet to match artificial vertebral lamina prostheses of different height specifications. The angle between the central axis of the second slot segment and the central axis of the first slot segment is 25° to 35° (preferably 30°), which is consistent with the direction of laminectomy in conventional lifting surgery, so that the artificial vertebral lamina prosthesis can be accurately implanted.

[0085] The technical solution of this application has the following advantages:

[0086] 1. The vertebral lamina distraction device has comprehensive functions. It can realize the connection, delivery and implantation of artificial vertebral lamina prosthesis while realizing vertebral lamina distraction;

[0087] 2. The lamina distraction device is easy to operate. The lamina can be vertically distracted by turning the knob, and the prosthesis can be implanted by loosening the locking piece.

[0088] 3. The vertebral lamina distraction device can realize accurate implantation of artificial vertebral lamina prosthesis, and the prosthesis can be accurately implanted into the vertebral lamina space through the guide groove.

[0089] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the clamping mechanism and the conveying mechanism are connected to form an integrated structure, the clamping mechanism is used to open the vertebral plate, the fixed structure is used to support the clamping mechanism and the movable structure, and the movable structure is used to connect and convey the implant, so that the implant can move along a predetermined path to the opened vertebral plate. Under the action of external force, the movable structure releases the implant, thereby achieving accurate implantation of the implant. That is to say, the clamping mechanism and the conveying mechanism are a whole. When the vertebral lamina is stretched open by the clamping mechanism, the implant can be connected and conveyed to the stretched vertebral lamina through the movable structure, and then the movable structure can be released by external force to accurately implant the implant into the stretched vertebral lamina, thereby achieving the purpose of accurately implanting the implant into the vertebral lamina while stretching the vertebral lamina; the clamping mechanism is connected to the movable structure through the fixed structure, and the purpose of stretching the vertebral lamina can be achieved by moving the clamping mechanism relative to the fixed structure, and the purpose of conveying the implant to the stretched vertebral lamina can be achieved by moving the movable structure relative to the fixed structure. Therefore, the vertebral lamina stretching device of the present application has lower requirements on the field of view and the operable range; in summary, the vertebral lamina stretching device of the present application can achieve the purpose of accurately implanting the implant into the vertebral lamina while stretching the vertebral lamina within a limited field of view and an operable range, thereby facilitating the operation.

[0090] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0091] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0092] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vertebral lamina distraction device, characterized in that: include: A clamping mechanism (10) comprising a clamping portion (11) for clamping or releasing a component to be installed (20); The conveying mechanism (30) comprises a fixed structure (31) and a movable structure (32) connected to the fixed structure (31); the clamping mechanism (10) is connected to the fixed structure (31) and is movably arranged relative to the fixed structure (31); the movable structure (32) comprises a connecting member (33) capable of being connected to a to-be-implanted component (40); the movable structure (32) is movably arranged relative to the fixed structure (31) to drive the to-be-implanted component (40) to move along a predetermined path; The fixed structure (31) comprises a first plate body (34) connected to the clamping mechanism (10) and a second plate body (35) connected to the first plate body (34); the movable structure (32) is connected to the second plate body (35) and is movably arranged relative to the second plate body (35); The fixed structure (31) comprises two second plates (35) arranged at intervals along a first direction, the two second plates (35) are both connected to the first plate (34), and a direction in which the movable structure (32) moves relative to the second plates (35) forms an angle with the first direction; The second plate body (35) is provided with a guide groove (36), and under the action of its own gravity, the movable structure (32) is movably arranged along the guide groove (36); The guide groove (36) comprises a first groove section (361) and a second groove section (362) connected to the first groove section (361), and an angle is formed between a central axis of the first groove section (361) and a central axis of the second groove section (362); The second plate body (35) comprises a first plate segment (351) connected to the first plate body (34) and a second plate segment (352) connected to the first plate segment (351), wherein the first plate segment (351) and the second plate segment (352) are arranged at an angle; The connecting member (33) comprises a connecting plate (37) connected to the fixing structure (31) and a fixing member (38) connected to the connecting plate (37), wherein the fixing member (38) is rotatably arranged relative to the connecting plate (37), and the fixing member (38) is used to connect or release the implant (40); The vertebral lamina distraction device further comprises a driving mechanism (50), the clamping mechanism (10) is connected to the fixed structure (31) via the driving mechanism (50), and at least a portion of the driving mechanism (50) is movably arranged relative to the fixed structure (31); The driving mechanism (50) comprises: A support seat (51), wherein the clamping mechanism (10) is connected to the fixed structure (31) via the support seat (51); A rack (52) disposed on the fixed structure (31); A gear (53) is disposed on the support base (51) and is rotatably disposed relative to the support base (51); the gear (53) is meshed with the rack (52) to drive the support base (51) and the clamping mechanism (10) to move.

2. The lamina distraction device according to claim 1, characterized in that: At least part of the outer wall surface of the fixing member (38) is provided with an external thread, so that the fixing member (38) and the implanted member (40) are threadedly matched; or, The movable structure (32) further comprises a locking member (39) connected to the connecting plate (37) so as to lock the connecting plate (37) on the fixed structure (31).

3. The lamina distraction device according to claim 1, characterized in that: The driving mechanism (50) further comprises: an elastic member (54), one end of the elastic member (54) being connected to the support seat (51), and the other end of the elastic member (54) being clamped to the rack (52); or, A knob (55) is connected to the gear (53), and the knob (55) is rotatably arranged relative to the support seat (51).

4. The lamina distraction device according to claim 1, characterized in that: The clamping mechanism (10) further comprises an adjusting structure (12), a first clamping arm (13) and a second clamping arm (14) pivotally connected to the first clamping arm (13); the first clamping arm (13) and the second clamping arm (14) each have a first end and a second end that are arranged opposite to each other; the first end of the first clamping arm (13) and the first end of the second clamping arm (14) are both connected to the adjusting structure (12); the second end of the first clamping arm (13) and the second end of the second clamping arm (14) are moved closer to or farther from each other to form the clamping portion (11); and the adjusting structure (12) is used to adjust the distance between the second end of the first clamping arm (13) and the second end of the second clamping arm (14).

5. The lamina distraction device according to claim 4, characterized in that: The adjustment structure (12) comprises a first connecting rod (15) and an adjustment member (16) connected to the first connecting rod (15); the first clamping arm (13) and the second clamping arm (14) are both connected to the first connecting rod (15); the adjustment member (16) is located on a side of the first clamping arm (13) away from the second clamping arm (14); and the adjustment member (16) and the first clamping arm (13) are both movably arranged relative to the first connecting rod (15).

6. The lamina distraction device according to claim 5, characterized in that: A through hole is provided on the first clamping arm (13), one end of the first connecting rod (15) is pivotally connected to the second clamping arm (14), and the other end of the first connecting rod (15) passes through the through hole and is connected to the adjusting member (16); or, At least part of the outer wall surface of the first connecting rod (15) is provided with an external thread, the adjusting member (16) is a nut, and the adjusting member (16) is threadedly connected to the first connecting rod (15); or, The adjustment structure (12) further comprises a limiting member (17) connected to the first connecting rod (15), and the adjustment member (16) is located between the limiting member (17) and the first clamping arm (13).

7. The lamina distraction device according to claim 4, characterized in that: The second end of the first clamping arm (13) and the second end of the second clamping arm (14) are both bent towards a side away from the conveying mechanism (30).

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