A pedicle screw implantation tool

Abstract

The present invention provides a pedicle screw implantation tool and a method of use, belonging to the field of medical device technology. The pedicle screw implantation tool provided by the present invention includes a central axis, a mounting assembly and a positioning pin anti-advance assembly. The central axis is provided with a positioning through hole suitable for the positioning pin to pass through; the mounting assembly is arranged on the outside of the first end of the central axis, and is used to install a punching nail, a tapping nail or a hollow threaded nail; the positioning pin anti-advance assembly is used to prevent the positioning pin from moving deep into the positioning hole during the operations of punching, tapping, and implanting hollow threaded nails. It is arranged at the second end of the central axis, including an anti-advance sleeve and an anti-advance slider. The anti-advance sleeve is rotatably arranged on the central axis, and the inner wall of the anti-advance sleeve is provided with an anti-advance thread opposite to the drilling thread direction. The anti-advance slider is slidably arranged in the anti-advance slide groove of the central axis, fixedly connected to the positioning pin, and threadedly connected to the anti-advance sleeve. The pedicle screw implantation tool provided by the present invention is simple to operate and improves the efficiency and accuracy of the operation.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a pedicle screw implantation tool and a use method thereof. Background Art

[0002] A pedicle screw is a common fixation screw used in posterior spinal screw-rod internal fixation surgery. Currently, the implantation of pedicle screws in patients mainly relies on the doctor's feel and experience. A hand drill is used to draw out a positioning hole, a positioning pin is used to locate the positioning hole, and then a tapping screw is used to tap and expand the hole. The pedicle screw is then implanted. The implantation of pedicle screws has high surgical requirements, and the training cycle of this type of technology is long. Complex surgeries have higher technical requirements. During the drilling process, the drilling tool is set on the outside of the positioning pin. As the drilling depth of the drilling tool increases, the positioning pin may follow the drilling tool to move deep into the bone, easily penetrating the bone cortex, leading to complications such as spinal cord, nerve root, and internal organ damage. Summary of the invention

[0003] The purpose of the present invention is to provide a pedicle screw implantation tool and a use method, aiming to solve the problem that the positioning needle moves deep into the bone when the pedicle screw is implanted and drilled.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a pedicle screw implantation tool, comprising:

[0005] A central axis, wherein a positioning through hole suitable for the positioning needle to pass through is arranged at the center of the central axis along its length direction;

[0006] An installation component is arranged outside the first end of the central axis and is used to install a punching nail, a tapping nail or a pedicle screw. The central axis is rotated to drive the punching nail, the tapping nail or the pedicle screw to rotate. The punching nail is used to drill a hole to obtain a positioning hole and implant the positioning needle. The tapping nail is used to tap and expand the positioning hole. The pedicle screw is implanted into the patient's body along the positioning hole;

[0007] The positioning needle anti-advance component is used to prevent the positioning needle from moving deeper into the positioning hole during drilling, tapping and pedicle screw implantation operations. It is arranged at the second end of the central axis, and includes an anti-advance sleeve and an anti-advance slider. The anti-advance sleeve is rotatably arranged on the central axis, and the inner wall of the anti-advance sleeve is provided with an anti-advance thread. The thread direction of the anti-advance thread is opposite to the thread direction of the punching screw, the tapping screw and the pedicle screw. An anti-advance groove is arranged in the length direction of the central axis, and the anti-advance slider is slidably arranged in the anti-advance groove. The anti-advance slider is fixedly connected to the positioning needle, and the anti-advance slider passes through the anti-advance groove and is threadedly connected to the anti-advance sleeve.

[0008] In a possible implementation, both ends of the anti-advance sliding block pass through the anti-advance sliding groove and are threadedly connected to the anti-advance sleeve via the anti-advance thread.

[0009] In a possible implementation, a positioning tail pin is provided at the second end of the anti-advance sliding block, and the positioning tail pin is sleeved on the end of the positioning pin, and the two are threadedly connected.

[0010] In a possible implementation, a first limit block and a second limit block are provided on the central axis to limit the displacement of the anti-advance sleeve in the length direction of the central axis.

[0011] In a possible implementation, the mounting assembly includes a sliding sleeve, a fixed sleeve and a fastening sleeve, the first end of the central shaft is provided with a rotating head, the sliding sleeve is slidably sleeved on the central shaft, the end of the sliding sleeve close to the rotating head is provided with a first threaded structure, the first end of the fixed sleeve is sleeved on the sliding sleeve and is threadedly connected to the sliding sleeve, the fixed sleeve is provided with a first rotating groove suitable for inserting the rotating head, the second end of the fixed sleeve is provided with a second threaded structure on the outside, and the second end of the fixed sleeve is provided with a threaded structure for inserting the rotating head. A housing cavity is provided for placing the punching nail or the tapping nail, the fastening sleeve is sleeved on the outside of the second threaded structure and applies a tightening pressure directed to the center thereto, the central axis is rotated to drive the fixing sleeve, the fastening sleeve and the punching nail to rotate, and a hole is punched to obtain the positioning hole, or the central axis is rotated to drive the fixing sleeve, the fastening sleeve and the tapping nail to rotate, and the positioning hole is tapped and expanded, or the pedicle screw is installed on the rotating head, the central axis is rotated to drive the pedicle screw to rotate, and the pedicle screw is implanted into the patient's body.

[0012] In a possible implementation, a limiting annular groove is provided on the central shaft, and a sliding block is provided at the second end of the sliding sleeve. The sliding block can be slidably sleeved in the limiting annular groove to limit the sliding displacement of the sliding sleeve.

[0013] In a possible implementation, a limiting column is disposed on a side wall of the sliding sleeve, and the limiting column passes through the sliding block to fix the sliding block on the sliding sleeve.

[0014] In a possible implementation manner, a pressing claw piece is provided at the free end of the fixing sleeve along the circumferential direction.

[0015] In a possible implementation manner, a handle suitable for rotating the central shaft is provided at the second end of the central shaft.

[0016] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for using a pedicle screw implantation tool, the using steps are as follows:

[0017] S1. Implant the positioning pin into the patient's body, determine the best implantation position of the positioning pin, install the punching nail in the installation assembly, and set the punching nail on the outside of the positioning pin along the length direction of the positioning pin. Rotate the central axis, keep the anti-advance sleeve stationary, rotate the punching nail, and punch a hole on the patient's bone. The positioning pin remains stationary relative to the patient's bone under the action of the anti-advance sleeve to prevent the positioning pin from moving deeper into the bone with the drilling tool. Remove the device, and the positioning pin is left in the positioning hole;

[0018] S2. Replace the punching nail with a tapping nail, install the tapping nail in the installation assembly, and set the tapping nail sleeve on the outside of the positioning pin along the length direction of the positioning pin. Turn the central axis, rotate the tapping nail, and tap and expand the positioning hole. The positioning pin remains stationary relative to the patient's bone under the action of the anti-entry sleeve to prevent the positioning pin from moving deep into the bone with the drilling tool. Remove the device, and the positioning pin is left in the positioning hole;

[0019] S3. Replace the tapping screw with a pedicle screw, install the pedicle screw on the rotating head, and place the pedicle screw sleeve on the outside of the positioning needle along the length direction of the positioning needle. Rotate the central axis and the pedicle screw to rotate and implant it into the patient's body. Release the fixation between the rotating head and the pedicle screw to complete the implantation of the pedicle screw.

[0020] The beneficial effects of a pedicle screw implantation tool and a method of use provided by the present invention are:

[0021] Compared with the prior art, the present invention comprises a central axis, an installation component and a positioning needle anti-entry component, which are used for implanting a pedicle screw into a patient's body. A positioning through hole is provided at the center of the central axis, and the positioning needle can pass through the positioning through hole, which is convenient for positioning with the help of the positioning needle and performing subsequent operations. The installation component is provided at the first end of the central axis, which is used to connect other components. A punching nail is installed for punching holes. The central axis drives the installation component and the punching nail to rotate, and the punching nail and the like are sleeved on the outside of the positioning needle. The central axis is rotated to drive the punching nail to rotate, and a positioning hole is obtained. A tapping nail is installed for tapping and expanding the hole. The central axis drives the installation component and the tapping nail to rotate, and the tapping nail and the like are sleeved on the outside of the positioning needle. The central axis drives the installation component and the tapping nail to rotate, and tapping and expanding the hole is performed. The pedicle screw is installed for implanting the pedicle screw, and the pedicle screw and the like are sleeved on the outside of the positioning needle. The anti-advance slider drives the positioning needle installed thereon to move in a direction away from the installation assembly, thereby preventing the positioning needle from moving deep into the bone during drilling, tapping, and implanting the pedicle screw, thereby completing the implantation of the pedicle screw. The positioning needle anti-advance component is used to prevent the positioning needle from moving deep into the positioning hole during drilling, tapping, and implanting the pedicle screw. The positioning needle anti-advance component comprises an anti-advance sleeve and an anti-advance slider. The anti-advance sleeve is rotatably arranged at the second end of the central axis, and the inner wall of the anti-advance sleeve is provided with an anti-advance thread opposite to the drilling direction. The anti-advance slider is slidably arranged on the central axis and is threadedly connected to the anti-advance sleeve through the anti-advance thread. When the drilling operation is performed, the anti-advance sleeve and the central axis are relatively rotated, and the anti-advance slider drives the positioning needle installed thereon to move in a direction away from the installation assembly, thereby preventing the positioning needle from moving deep into the bone during drilling, thereby reducing damage to the patient. The device can complete the operations of positioning drilling, tapping, and implanting the pedicle screw in sequence according to the surgical requirements. It is easy to operate, greatly reduces the difficulty of the operation, and shortens the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a pedicle screw implantation tool provided in an embodiment of the present invention Figure 1 ;

[0024] Figure 2 A schematic diagram of the structure of a pedicle screw implantation tool provided in an embodiment of the present invention Figure 2 ;

[0025] Figure 3A schematic diagram of the structure of a pedicle screw implantation tool provided in an embodiment of the present invention Figure 3 ;

[0026] Figure 4 for Figure 1 A cross-sectional structural diagram of a pedicle screw implantation tool is shown;

[0027] Figure 5 A schematic diagram of the structure of the central axis used in an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the structure of a sliding sleeve used in an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the structure of a pedicle screw used in an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the structure of a fixed sleeve used in an embodiment of the present invention;

[0031] Fig. 9 The figure is a schematic structural diagram of the anti-intrusion sliding block used in an embodiment of the present invention.

[0032] In the figure: 1. central axis; 2. sliding sleeve; 3. rotating head; 4. first thread structure; 5. fixing sleeve; 6. fastening sleeve; 7. punching nail; 8. second thread structure; 9. positioning pin; 10. tapping nail; 11. nail seat; 12. hollow thread nail; 13. second rotating groove; 14. anti-advance sleeve; 15. anti-advance slider; 16. anti-advance thread; 17. anti-advance slide groove; 18. positioning tail pin; 19. first limit block; 20. second limit block; 21. limit ring groove; 22. sliding block; 23. limit column; 24. pressing claw; 25. separation nail tail; 26. breaking groove; 27. handle. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Please refer to Figures 1 to 9, a specific embodiment of a pedicle screw implantation tool provided by the present invention is now described, comprising: a central axis 1, a positioning through hole suitable for a positioning needle 9 to pass through is arranged at the center of the central axis 1 along its length direction; a mounting assembly, arranged on the outer side of the first end of the central axis 1, for mounting a punching screw 7, a tapping screw 10 or a pedicle screw, rotating the central axis 1 to drive the punching screw 7, the tapping screw 10 or the pedicle screw to rotate, the punching screw 7 is used to drill a hole to obtain a positioning hole and implant the positioning needle 9, the tapping screw 10 is used to tap and expand the positioning hole, and the pedicle screw is implanted into the patient's body along the positioning hole; a positioning needle anti-entry assembly, used to avoid punching, tapping, During the operation of implanting the pedicle screw, the positioning pin 9 moves deep into the positioning hole and is arranged at the second end of the central axis 1, including an anti-advance sleeve 14 and an anti-advance slider 15. The anti-advance sleeve 14 is rotatably arranged on the central axis 1, and an anti-advance thread 16 is arranged on the inner wall of the anti-advance sleeve 14. The thread direction of the anti-advance thread 16 is opposite to the thread direction of the punching screw 7, the tapping screw 10, and the pedicle screw. An anti-advance groove 17 is arranged in the length direction of the central axis 1, and the anti-advance slider 15 is slidably arranged in the anti-advance groove 17. The anti-advance slider 15 is fixedly connected to the positioning pin 9, and the anti-advance slider 15 passes through the anti-advance groove 17 and is threadedly connected to the anti-advance sleeve 14.

[0035] The pedicle screw implantation tool provided by the present invention comprises a central shaft 1, an installation component and a positioning pin anti-entry component, which is used to implant the pedicle screw into the patient's body. A positioning through hole is arranged at the center of the central shaft 1, and the positioning pin 9 can pass through the positioning through hole, which is convenient for positioning with the help of the positioning pin 9 and performing subsequent operations. The installation component is arranged at the first end of the central shaft 1 for connecting other components, and the installation punching nail 7 is used for punching. The central shaft 1 drives the installation component and the punching nail 7 to rotate to position the screw in the positioning hole. The positioning pin 9 is used as a guide, and the punching nail 7 and the like are sleeved on the outside of the positioning pin 9. The central shaft 1 is rotated to drive the punching nail 7 to rotate, and a hole is punched to obtain a positioning hole. The tapping nail 10 is installed for tapping and expanding the hole. The central shaft 1 drives the installation component and the tapping nail 10 to rotate, and the positioning pin 9 in the positioning hole is used as a guide. The tapping nail 10 and the like are sleeved on the outside of the positioning pin 9. The central shaft 1 drives the installation component and the tapping nail 10 to rotate, and the pedicle screw is installed for implanting the pedicle screw, and the positioning pin 9 in the positioning hole is used as a guide. The pedicle screws are set on the outside of the positioning needle 9, the central axis 1 is rotated to drive the pedicle screws to rotate, and the pedicle screws are implanted into the positioning holes after the tapping operation to complete the implantation of the pedicle screws. The positioning needle anti-advance component is used to prevent the positioning needle 9 from moving deep into the positioning hole during the tapping and implantation of the pedicle screws. The positioning needle anti-advance component includes an anti-advance sleeve 14 and an anti-advance slider 15. The anti-advance sleeve 14 is rotatably arranged at the second end of the central axis 1. The inner wall of the anti-advance sleeve 14 is provided with an anti-advance thread 16 opposite to the drilling direction. The block 15 is slidably arranged on the central axis 1 and is threadedly connected with the anti-advance sleeve 14 through the anti-advance thread 16. When drilling, the anti-advance sleeve 14 and the central axis 1 realize relative rotation, and the anti-advance slider 15 drives the positioning pin 9 installed thereon to move away from the mounting assembly, thereby preventing the positioning pin 9 from moving deep into the bone during drilling, thereby reducing damage to the patient. The device can complete the positioning drilling, tapping, and pedicle screw implantation operations in sequence according to surgical requirements, is easy to operate, greatly reduces the difficulty of the operation, and shortens the operation time.

[0036] For details, please refer to Figures 1 to 9, including a central axis 1, a mounting assembly and a positioning needle anti-entry assembly, which are used to implant a pedicle screw into a patient's body. A positioning through hole is provided at the center of the central axis 1, and a positioning needle 9 can pass through the positioning through hole. The mounting assembly is sleeved on the central axis 1 for connecting with other components, and a punching nail 7 is installed for drilling a positioning hole. The positioning needle 9 is implanted into the patient's body, and the best implantation position of the positioning needle 9 is determined by X-ray. The punching nail 7 is sleeved on the outside of the positioning needle 9 along the length direction of the positioning needle 9, and the central axis 1 is rotated. The punching screw 7 rotates accordingly, and a punching operation is performed on the patient's bone to obtain a positioning hole. The tapping screw 10 is installed for tapping and expanding the hole. The central axis 1, the mounting assembly and the tapping screw 10 are sleeved on the outside of the positioning needle 9. The central axis 1 is rotated, and the mounting assembly and the tapping screw 10 are rotated accordingly. The tapping and expanding operation is performed on the patient's bone. The pedicle screw is installed for implanting the pedicle screw. The pedicle screw includes a screw seat 11 and a hollow threaded screw 12. The positioning needle 9 is used as a guide, and the central axis 1 and the pedicle screw are sleeved on the positioning needle 9. The positioning needle 9 is positioned outside, the central axis 1 is rotated, and the pedicle screw is rotated accordingly and implanted into the positioning hole after tapping. The positioning punching assembly, the tapping assembly, and the pedicle screw are replaced and used in sequence to complete the positioning punching, tapping, and pedicle screw implantation operations. The positioning needle anti-advance assembly includes an anti-advance sleeve 14 and an anti-advance slider 15. The anti-advance sleeve 14 is arranged at the second end of the central axis 1 and can be relatively rotated with the central axis 1. The inner wall of the anti-advance sleeve 14 is provided with an anti-advance thread 16 opposite to the drilling direction. The central axis 1 is provided along the length direction. There is an anti-advance groove 17, an anti-advance slider 15 is arranged in the anti-advance groove 17, and is threadedly connected to the anti-advance sleeve 14 through an anti-advance thread 16. The anti-advance slider 15 is fixedly connected to the positioning pin 9. When drilling, the anti-advance sleeve 14 rotates relative to the center axis 1. Under the action of the anti-advance thread 16, the anti-advance slider 15 moves to the end away from the mounting assembly to prevent the positioning pin 9 from moving deep into the bone, which greatly reduces the difficulty of positioning during surgery, shortens the operation time, and reduces damage to the patient.

[0037] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 5 , Fig. 9 Both ends of the anti-advance sliding block 15 pass through the anti-advance sliding groove 17 and are threadedly connected to the anti-advance sleeve 14 through the anti-advance thread 16 .

[0038] For details, please refer to Figures 1 to 5 , Fig. 9 The anti-advance slider 15 passes through the anti-advance slide groove 17 , and both end surfaces of the anti-advance slider 15 passing through the anti-advance slide groove 17 are threadedly connected with the anti-advance thread 16 .

[0039] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 5 , Fig. 9The second end of the anti-advance slider 15 is provided with a positioning tail pin 18, and the positioning tail pin 18 is sleeved on the end of the positioning pin 9, and the two are threadedly connected.

[0040] For details, please refer to Figures 1 to 5 , Fig. 9 The positioning tail pin 18 is arranged at the end of the anti-entry slider 15 away from the positioning pin 9. The positioning tail pin 18 is sleeved on the end of the positioning pin 9. The positioning tail pin 18 is threadedly connected with the positioning pin 9 to fix the positioning pin 9 on the anti-entry slider 15, which is easy to disassemble and install. The other end of the positioning tail pin 18 passes through the center axis 1. By changing the length of the positioning tail pin 18 outside the center axis 1, it is convenient to observe the position change of the positioning pin 9.

[0041] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 5 , Fig. 9 A first limit block 19 and a second limit block 20 are provided on the central axis 1 to limit the displacement of the anti-advance sleeve 14 in the length direction of the central axis 1 .

[0042] For details, please refer to Figures 1 to 5 , Fig. 9 A first limit block 19 and a second limit block 20 are provided on the central axis 1 , and the anti-advance sleeve 14 is provided between the first limit block 19 and the second limit block 20 , so as to limit the displacement of the anti-advance sleeve 14 in the length direction of the central axis 1 .

[0043] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 7 The mounting assembly includes a sliding sleeve 2, a fixed sleeve 5 and a fastening sleeve 6. The first end of the central shaft 1 is provided with a rotating head 3. The sliding sleeve 2 is slidably sleeved on the central shaft 1. The end of the sliding sleeve 2 close to the rotating head 3 is provided with a first thread structure 4. The first end of the fixed sleeve 5 is sleeved on the sliding sleeve 2 and is threadedly connected to the sliding sleeve 2. The fixed sleeve 5 is provided with a first rotating groove suitable for inserting the rotating head 3. The second end of the fixed sleeve 5 is provided with a second thread structure 8 on the outside. The second end of the fixed sleeve 5 is provided with a thread structure for placing the The accommodating cavity of the punching nail 7 or the tapping nail 10, the fastening sleeve 6 is sleeved on the outside of the second threaded structure 8 and applies a tightening pressure directed to the center thereon, the central axis 1 is rotated to drive the fixed sleeve 5, the fastening sleeve 6 and the punching nail 7 to rotate, and a hole is punched to obtain the positioning hole, or the central axis 1 is rotated to drive the fixed sleeve 5, the fastening sleeve 6 and the tapping nail 10 to rotate, and the positioning hole is tapped and expanded, or the pedicle screw is installed on the rotating head 3, the central axis 1 is rotated to drive the pedicle screw to rotate, and the pedicle screw is implanted into the patient's body.

[0044] For details, please refer to Figures 1 to 7 A rotating head 3 is provided at one end of the central axis 1, and the installation component includes a sliding sleeve 2, a fixed sleeve 5 and a fastening sleeve 6. The sliding sleeve 2 is slidably sleeved on the central axis 1 and is provided with a first threaded structure 4 for threaded connection with other components. The fixed sleeve 5 is installed on the first threaded structure 4. The first end of the fixed sleeve 5 is provided with a second threaded structure 8. The fastening sleeve 6 fixes the nail tail of the punching nail 7 or the tapping nail 10 in the second threaded structure 8. A first rotating groove is provided inside the fixed sleeve 5. The rotating head 3 is inserted into the first rotating groove, and the punching nail 7 is installed. With the positioning pin 9 as a guide, the central axis 1, the fixed sleeve 5, the fastening sleeve 6 and the punching nail 7 are sleeved on the outside of the positioning pin 9. The central axis 1 is rotated, and the fixed sleeve 5, the fastening sleeve 6 and the punching nail 7 are rotated accordingly. A drilling operation is performed on the patient's bone to obtain a positioning hole, and the tapping nail 10 is installed. The fastening sleeve 6 fixes the nail tail of the tapping nail 10 in the second threaded structure 8 to position. The needle 9 is used as a guide, and the central axis 1, the fixed sleeve 5, the fastening sleeve 6 and the tapping screw 10 are sleeved on the outside of the positioning needle 9. The central axis 1 is rotated, and the fixed sleeve 5, the fastening sleeve 6 and the tapping screw 10 are rotated accordingly, and the tapping and expanding operation is performed on the patient's bone. The pedicle screw includes a screw seat 11 and a hollow threaded screw 12. The second rotating groove 13 is provided on the screw tail of the hollow threaded screw 12. The rotating head 3 is inserted into the second rotating groove 13. The free end of the screw seat 11 is provided with a separating screw tail 25. A breaking groove 26 is provided between the separation nail tail 25 and the nail seat 11, and the breaking groove 26 is easy to break and separate. The inner wall of the separation nail tail 25 is threadedly connected with the first threaded structure 4. With the positioning needle 9 as a guide, the central axis 1 and the pedicle screw are arranged on the outside of the positioning needle 9, and the central axis 1 is rotated, and the pedicle screw rotates accordingly and is implanted into the positioning hole after tapping, thereby increasing the stability of the pedicle screw during implantation. After the implantation is completed, the separation nail tail 25 is broken and the device can be removed. It is convenient and quick to use.

[0045] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 4 , Figure 6 A limiting annular groove 21 is provided on the central shaft 1, and a sliding block 22 is provided on the second end of the sliding sleeve 2. The sliding block 22 can be slidably sleeved in the limiting annular groove 21 to limit the sliding displacement of the sliding sleeve 2.

[0046] For details, please refer to Figures 1 to 4 , Figure 6A limiting annular groove 21 is arranged on the central axis 1, a slot penetrating the side wall is arranged at the second end of the sliding sleeve 2, a sliding block 22 is arranged in the slot, and the sliding block 22 is slidably sleeved in the limiting annular groove 21 to limit the sliding displacement of the sliding sleeve 2. By means of the displacement of the sliding sleeve 2 in the length direction of the central axis 1 and the rotation of the sliding sleeve 2, the sliding sleeve 2 can lock the fixed sleeve 5 and the pedicle screw.

[0047] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 4 , Figure 6 A limiting column 23 is provided on the side wall of the sliding sleeve 2 , and the limiting column 23 passes through the sliding block 22 to fix the sliding block 22 on the sliding sleeve 2 .

[0048] For details, please refer to Figures 1 to 4 , Figure 6 A limiting column 23 is provided on the side wall of the card slot of the sliding sleeve 2. The limiting column 23 passes through the side wall and penetrates into the limiting hole provided on the sliding block 22 to fix the sliding block 22 and the sliding sleeve 2.

[0049] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figure 4 , Figure 8 The free end of the fixing sleeve 5 is provided with a pressing claw piece 24 along the circumferential direction.

[0050] For details, please refer to Figure 4 , Figure 8 The free end of the fixing sleeve 5 is provided with a pressing claw piece 24, and the pressing claw piece 24 is arranged along the circumferential direction. The second threaded structure 8 extends to the free end of the pressing claw piece 24. After the nail tails of the punching nails 7 and the tapping nails 10 are installed inside the second threaded structure 8, the fastening sleeve 6 is sleeved on the outside of the second threaded structure 8, and pressure is applied to the pressing claw piece 24 to fix the punching nails 7 and the tapping nails 10 in the second threaded structure 8.

[0051] As a specific embodiment of the pedicle screw implantation tool provided by the present invention, please refer to Figures 1 to 4 A handle 27 suitable for rotating the central shaft 1 is provided at the second end of the central shaft 1 .

[0052] For details, please refer to Figures 1 to 4 A handle 27 is disposed at the second end of the central shaft 1. The handle 27 is fixedly connected to the central shaft 1, and the handle 27 is suitable for rotating the central shaft 1.

[0053] A specific embodiment of a pedicle screw implantation tool provided by the present invention is now described. The pedicle screw implantation tool as described in any one of the above items is used, and the steps of use are as follows:

[0054] S1. Implant the positioning pin 9 into the patient's body, determine the best implantation position of the positioning pin 9, install the punching nail 7 in the installation assembly, and sleeve the punching nail 7 on the outside of the positioning pin 9 along the length direction of the positioning pin 9. The positioning pin 9 is inserted into the central axis 1, and the central axis 1 is rotated to keep the anti-advance sleeve 14 stationary. The punching nail 7 rotates to drill holes on the patient's bone. The positioning pin 9 remains stationary relative to the patient's bone under the action of the anti-advance sleeve 14 to prevent the positioning pin 9 from moving deeper into the bone with the drilling tool. The device is removed, and the positioning pin 9 is left in the positioning hole;

[0055] S2, replace the punching nail 7 with a tapping nail 10, install the tapping nail 10 in the installation assembly, and sleeve the tapping nail 10 on the outside of the positioning pin 9 along the length direction of the positioning pin 9, rotate the central axis 1, and the tapping nail 10 rotates to tap and expand the positioning hole. The positioning pin 9 remains stationary relative to the patient's bone under the action of the anti-entry sleeve 14 to prevent the positioning pin 9 from moving into the deep bone with the drilling tool. Remove the device, and the positioning pin 9 is left in the positioning hole;

[0056] S3, replace the tapping screw 10 with a pedicle screw, install the pedicle screw on the rotating head 3, and sleeve the pedicle screw on the outside of the positioning needle 9 along the length direction of the positioning needle 9. Rotate the central axis 1, rotate the pedicle screw, and implant it into the patient's body. Release the fixation between the rotating head 3 and the pedicle screw to complete the implantation of the pedicle screw.

[0057] Specifically, the best implantation position of the positioning needle 9 is determined by X-ray, the positioning needle 9 is implanted in the patient's body, the fixed sleeve 5 is installed, the fixed sleeve 5 is sleeved on the central axis 1, the rotating head 3 is inserted into the first rotating groove, the sliding sleeve 2 is rotated at this time, the first thread structure 4 of the sliding sleeve 2 is screwed into the fixed sleeve 5, the fixed sleeve 5 is fixed, the punching nail 7 is fastened and installed in the fixed sleeve 5 with the help of the fastening sleeve 6, the positioning needle 9 is inserted from the free end of the punching nail 7, and the end of the positioning tail needle 18 is inserted, the anti-entry sleeve 14 is rotated, and the positioning tail needle 1 8 is locked with the positioning pin 9, the positioning pin 9 is against the position to be drilled, the handle 27 is turned, the anti-advance sleeve 14 is kept not to rotate, and the punching nail 7 punches a hole in the patient's bone. At this time, the positioning pin 9 will not move into the bone under the action of the anti-advance sleeve 14. After the drilling is completed, the positioning pin 9 is kept stationary, the anti-advance sleeve 14 is rotated, the positioning tail pin 18 is separated from the positioning pin 9, the device is removed, the punching nail 7 is replaced with a tapping nail 10, and the tapping nail 10 is sleeved on the outside of the positioning pin 9 with the positioning pin 9 as a guide, and the anti-advance sleeve 14 is rotated to separate the positioning tail pin 18 from the positioning pin 9. The positioning pin 9 is fixed, the handle 27 is turned, the anti-advance sleeve 14 is kept from rotating, and the tapping screw 10 is used to tap and expand the positioning hole. At this time, the positioning pin 9 will not move into the bone under the action of the anti-advance sleeve 14. After the tapping is completed, the positioning pin 9 is kept stationary, the anti-advance sleeve 14 is rotated, the positioning tail pin 18 is separated from the positioning pin 9, the device is removed, the fixing sleeve 5, the fastening sleeve 6 and the tapping screw 10 are removed, and the pedicle screw is installed. The rotating head 3 is inserted into the second rotating groove 13, and the sliding sleeve 2 is rotated at this time to screw the first thread structure 4 of the sliding sleeve 2 into The pedicle screw is fixed in the separation nail tail 25, and the pedicle screw is sleeved on the outside of the positioning needle 9 with the positioning needle 9 as a guide. The anti-advance sleeve 14 is rotated to fix the positioning tail needle 18 and the positioning needle 9, and the handle 27 is rotated to keep the anti-advance sleeve 14 from rotating. The pedicle screw is implanted in the positioning hole. At this time, the positioning needle 9 will not move into the bone under the action of the anti-advance sleeve 14. After the pedicle screw is implanted, the screw seat 11 is kept stable, the separation nail tail 25 and the screw seat 11 are broken, and the device and the positioning needle 9 are removed from the patient to complete the pedicle screw implantation operation.

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

Claims

1. A pedicle screw implantation tool, characterized in that: include: A central shaft, wherein a positioning through hole suitable for the positioning needle to pass through is arranged at the center of the central shaft along its length direction, and a handle suitable for rotating the central shaft is arranged at the second end of the central shaft; The mounting assembly is arranged on the outside of the first end of the central axis and is used for mounting punching nails, tapping nails or pedicle screws. The central axis is rotated to drive the punching nails, tapping nails or pedicle screws to rotate. The punching nails are used for drilling holes to obtain positioning holes and implanting the positioning needles. The tapping nails are used for tapping and expanding the positioning holes. The pedicle screws are implanted into the patient's body along the positioning holes. The mounting assembly includes a sliding sleeve, a fixed sleeve and a fastening sleeve. The first end of the central axis is provided with a rotating head. The sliding sleeve is slidably mounted on the central axis. The end of the sliding sleeve close to the rotating head is provided with a first threaded structure. The first end of the fixed sleeve is mounted on the sliding sleeve and is threadedly connected to the sliding sleeve. The fixed sleeve The sleeve is provided with a first rotating groove suitable for inserting the rotating head, the second end of the fixed sleeve is provided with a second threaded structure on the outside, the second end of the fixed sleeve is provided with a receiving cavity for placing the punching nail or the tapping nail, the fastening sleeve is sleeved on the outside of the second threaded structure and applies a tightening pressure directed to the center, the central axis is rotated to drive the fixed sleeve, the fastening sleeve and the punching nail to rotate, punch a hole to obtain the positioning hole, or the central axis is rotated to drive the fixed sleeve, the fastening sleeve and the tapping nail to rotate, tap the positioning hole, or the pedicle screw is installed on the rotating head, the central axis is rotated to drive the pedicle screw to rotate, and the pedicle screw is implanted into the patient's body; The positioning needle anti-advance component is used to prevent the positioning needle from moving deeper into the positioning hole during drilling, tapping and pedicle screw implantation operations. It is arranged at the second end of the central axis, and includes an anti-advance sleeve and an anti-advance slider, the anti-advance sleeve is rotatably arranged on the central axis, the inner wall of the anti-advance sleeve is provided with an anti-advance thread, the thread direction of the anti-advance thread is opposite to the thread direction of the punching screw, the tapping screw and the pedicle screw, and the length direction of the central axis is provided with an anti-advance slide groove, the anti-advance slide block is slidably arranged in the anti-advance slide groove, the anti-advance slide block is fixedly connected with the positioning needle, the anti-advance slide block passes through the anti-advance slide groove and is threadedly connected with the anti-advance sleeve. When drilling operation is performed, the anti-advance sleeve rotates relative to the central axis, and under the action of the anti-advance thread, the anti-advance slide block moves to one end away from the installation component to prevent the positioning needle from moving deeper into the bone.

2. A pedicle screw implantation tool as claimed in claim 1, characterized in that: Both ends of the anti-advance sliding block penetrate the anti-advance sliding groove and are threadedly connected to the anti-advance sleeve through the anti-advance thread.

3. A pedicle screw implantation tool as claimed in claim 2, characterized in that: A positioning tail pin is arranged at the second end of the anti-advance sliding block. The positioning tail pin is sleeved on the end of the positioning pin, and the two are threadedly connected.

4. A pedicle screw implantation tool as claimed in claim 1, characterized in that: A first limit block and a second limit block are arranged on the central axis to limit the displacement of the anti-advance sleeve in the length direction of the central axis.

5. A pedicle screw implantation tool as claimed in claim 1, characterized in that: A limiting annular groove is arranged on the central shaft, and a sliding block is arranged on the second end of the sliding sleeve. The sliding block can be slidably sleeved in the limiting annular groove to limit the sliding displacement of the sliding sleeve.

6. A pedicle screw implantation tool as claimed in claim 5, characterized in that: A limiting column is arranged on the side wall of the sliding sleeve, and the limiting column penetrates the sliding block to fix the sliding block on the sliding sleeve.

7. A pedicle screw implantation tool as claimed in claim 1, characterized in that: The free end of the fixing sleeve is provided with a pressing claw piece along the circumferential direction.

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