Integrated pedicle screw implantation channel making tool

Abstract

The invention discloses an integrated pedicle screw implantation channel making tool. The integrated pedicle screw implantation channel making tool comprises a needle body and a sleeve. The sleeve sleeves and is slidably connected to the needle body, and one end of the needle body is a working end. The integrated pedicle screw implantation channel making tool has an open form and an open form. In the open state, the length of the sleeve locked to the working end of the needle body and exposed out of the sleeve is a first length. In the opening state, the part, exposed out of the sleeve, of the working end of the needle body is used for opening a target object. In the open-circuit state, the length of the sleeve locked to the working end of the needle body and exposed out of the sleeve is a second length, and the second length is larger than the first length. In the open-circuit state, the part, exposed out of the sleeve, of the working end of the needle body is used for conducting open-circuit work on a target object.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an integrated pedicle screw placement channel making tool. Background Art

[0002] Spinal surgery is an important branch of orthopedic surgery. The spine consists of the cervical spine, thoracic spine, lumbar spine, sacral spine and coccygeal spine from top to bottom. Lumbar degenerative lesions are one of the most common diseases in spinal surgery. Lumbar degenerative lesions include lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, lumbar scoliosis / kyphosis, etc. At the same time, the lumbar spine is also the most common site of spinal fracture. In the face of the above diseases, surgery is the final and most effective treatment method.

[0003] In surgical operations involving the lumbar spine, the following parts are usually included: ① pedicle screw fixation; ② treatment of the intervertebral disc, including simple nucleus pulposus removal, intervertebral disc removal, etc.; ③ intervertebral space filling, including bone grafting, fusion device placement, artificial intervertebral disc placement, etc. When dealing with lumbar degenerative lesions, all of the above steps are usually required; depending on the surgical approach, there are posterior lumbar pedicle screw fixation and bone graft fusion (PLIF), posterolateral lumbar pedicle screw fixation and bone graft fusion (TLIF), and anterolateral lumbar pedicle screw fixation and bone graft fusion (OLIF). When dealing with simple lumbar fractures, it is usually only necessary to insert pedicle screws. In most lumbar tumor surgeries, multi-segment pedicle screw fixation is usually required to stabilize the force line and morphology of the spine after tumor resection.

[0004] The tools required for pedicle screw insertion include an opener, a tap, a probe, and a tap. The general pedicle screw insertion process is summarized as follows: ① Cut the skin and separate the subcutaneous tissue until the lamina and facet joint are exposed; ② Select the appropriate point of the facet joint, use the opener to open the hole, replace the tap, select the appropriate direction to open the hole through the opening, use the probe to confirm whether the opening channel is correct (that is, the four walls of the channel are all bony, indicating that the channel has completely processed the vertebrae, and the length is appropriate, generally 40-50mm), and insert the pedicle screw after tapping; ③ Repeat the above steps until all screws are correctly inserted.

[0005] However, in actual operation, since the facet joint is mainly cancellous bone tissue, when the mouth opener is opened and removed, bleeding usually continues at the opening until the opening cone is inserted into the opening to proceed to the next step. In clinical operation, the connection between the mouth opener and the opening cone is often not smooth. One of the reasons is that the facet joint will bleed continuously during the connection process. When the bleeding is heavy, sometimes the blood may cover the opening, making it impossible for the operator to find the opening position and perform the opening operation in the first time. Summary of the invention

[0006] In view of the above problems, the present invention provides an integrated pedicle screw placement channel making tool, comprising a needle body and a sleeve, wherein the sleeve is sleeved and slidably connected to the needle body, and one end of the needle body is a working end; The integrated pedicle screw placement channel making tool has an open form and an open circuit form; in the open form, the length of the sleeve locked to the working end of the needle body exposed from the sleeve is a first length; in the open form, the portion of the working end of the needle body exposed from the sleeve is used to perform an opening operation on the target object; In the open-circuit form, the sleeve is locked to a second length of the working end of the needle body exposed from the sleeve, and the second length is greater than the first length; in the open-circuit form, the portion of the working end of the needle body exposed from the sleeve is used to perform an open-circuit operation on the target object.

[0007] Optionally, a sliding limit guide structure is provided between the sleeve and the needle body, and the sliding limit guide structure includes a guide groove arranged along the axial direction of the needle body and a slider slidably connected to the guide groove, and any one of the guide groove and the slider is provided on the sleeve, and the other is provided on the needle body.

[0008] Optionally, an open locking structure and an open-circuit locking structure are provided between the sleeve and the needle body; the open locking structure is used to lock the sleeve and the needle body in a position where the working end of the needle body is exposed beyond the position where the length of the sleeve is the first length; the open-circuit locking structure is used to lock the sleeve and the needle body in a position where the working end of the needle body is exposed beyond the position where the length of the sleeve is the second length.

[0009] Optionally, the opening locking structure includes a limiting member; The needle body is provided with a first limit surface set toward the working end, and the sleeve is provided with a second limit surface set toward the first limit surface. The limit member is arranged between the first limit surface and the second limit surface, and the two ends of the limit member are respectively abutted against the first limit surface and the second limit surface; and the limit member can be taken out from between the first limit surface and the second limit surface.

[0010] Optionally, when both ends of the limiting member are respectively in contact with the first limiting surface and the second limiting surface, the sliding block slides to one end of the guide slot.

[0011] Optionally, the open-circuit locking structure includes a first magnet and a second magnet, the first magnet is arranged on the needle body, and the second magnet is arranged on the sleeve; in the open-circuit form, the limiting member is taken out from between the first limiting surface and the second limiting surface, and the first limiting surface abuts against the second limiting surface, and the first magnet and the second magnet attract each other through magnetic force to fix the syringe and the needle body at the position where the first limiting surface abuts against the second limiting surface.

[0012] Optionally, the opening locking structure includes an opening slide groove, which is arranged along the circumferential direction of the needle body and is connected to the guide slide groove. The slider can slide into the opening slide groove, and when the slider is in the opening slide groove, its freedom in the axial direction of the needle body is locked.

[0013] Optionally, the opening locking structure includes an open-circuit slide groove, which is arranged along the circumferential direction of the needle body and is connected to the guide slide groove. The slider can slide into the open-circuit slide groove, and when the slider is in the open-circuit slide groove, its freedom in the axial direction of the needle body is locked.

[0014] Optionally, one end of the sleeve is a limiting end, and the working end of the needle body is exposed from the sleeve from the limiting end of the sleeve; the limiting end of the sleeve is provided with a limiting end surface.

[0015] Optionally, the needle body has two ends, one of which is the working end and the other end is provided with a gripping portion.

[0016] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: The integrated pedicle screw placement channel-making tool provided by the present invention is first locked to an open state, in which the operator can perform opening work, and then adjusted and locked to an open circuit state, in which the operator can perform opening work. Therefore, the integrated pedicle screw placement channel-making tool provided by the present invention can be used for both opening and opening operations, thus avoiding problems that may occur when replacing tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0018] Figure 1 It is a schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open state; Figure 2is a schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open-circuit configuration; Figure 3 It is a cross-sectional schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open state; Figure 4 It is a cross-sectional schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open-circuit configuration; Figure 5 It is a partial enlarged schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 when the limiting member is removed; Figure 6 A schematic cross-sectional view of an integrated pedicle screw placement channel-making tool at a stopper in an open state provided by another embodiment of the present invention; Figure 7 It is a schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open state; Figure 8 It is a schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open-circuit configuration; Fig. 9 It is a partially enlarged schematic diagram of an integrated pedicle screw placement channel-making tool in Example 1 in an open shape.

[0019] Description of reference numerals: 1: needle body; 2: sleeve; 3: working end; 4: gripping part; 5: sleeve driving part; 6: semicircular structure; 7: limiter driving part; 8: slider; 9: guide slide groove; 10: first magnet; 11: second magnet; 12: limit end surface; 13: first limit surface; 14: second limit surface; 15: third magnet; 16: fourth magnet; 17: open slide groove; 18: open-circuit slide groove; 19: fifth magnet; 20: sixth magnet; 21: seventh magnet. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0022] Example 1 See also Figures 1 to 5 The present embodiment provides an integrated pedicle screw placement channel making tool, comprising a needle body 1 and a sleeve 2. The sleeve 2 is sleeved and slidably connected to the needle body 1, and one end of the needle body 1 is a working end 3. The integrated pedicle screw placement channel making tool has an open form and an open circuit form.

[0023] In the open state, the sleeve 2 is locked to the length of the working end 3 of the needle body 1 exposed from the sleeve 2, which is a first length. In the open state, the portion of the working end 3 of the needle body 1 exposed from the sleeve 2 is used to perform an opening operation on the target object.

[0024] In the open circuit state, the length of the working end 3 of the sleeve 2 locked to the needle body 1 is a second length, which is greater than the first length. In the open circuit state, the part of the working end 3 of the needle body 1 exposed from the sleeve 2 is used to open the target object.

[0025] When using the integrated pedicle screw placement channel making tool, first slide the sleeve 2 to the position where the working end 3 of the needle body 1 is exposed to the sleeve 2 at the first length, and then lock the sleeve 2 at this position. At this time, the integrated pedicle screw placement channel making tool is in an open state and can be used to perform opening work (that is, opening operation); after completing the opening work, first release the position lock between the sleeve 2 and the needle body 1, and then slide the sleeve 2 to the position where the working end 3 of the needle body 1 is exposed to the sleeve 2 at the second length, and then lock the sleeve 2 at this position. At this time, the integrated pedicle screw placement channel making tool is in an open circuit state and can be used to perform opening work (that is, opening operation). Therefore, by using the integrated pedicle screw placement channel making tool provided in this embodiment, the opening operation and the opening circuit operation can be completed, and there is no need to replace the instrument between the opening operation and the opening circuit operation, which avoids the problems that occur when replacing tools in the prior art.

[0026] The integrated pedicle screw placement channel making tool of this embodiment is further described below.

[0027] One end of the needle body 1 is a working end 3, which is used to realize opening and opening work; the other end of the needle body 1 is provided with a gripping portion 4. When the operator uses the integrated pedicle screw placement channel making tool, the palm of the operator wraps the gripping portion 4, and the fingers extend from the gripping portion 4 to the needle body 1 / sleeve 2 / limiting member. The gripping portion 4 can be a structure with a rigid material inside and a layer of flexible material wrapped outside, or it can be a balloon structure directly, etc. The specific structure of the gripping portion 4 is not limited.

[0028] The structure of the working end 3 of the needle body 1 can be specifically designed according to the shape required when performing an opening and opening operation on the target object. For example, the shape of the working end 3 of the needle body 1 can be designed with reference to the shape of the working end 3 of the opening cone, or the working end 3 of the needle body 1 can be set to a structure similar to a cone - the closer to the end, the smaller the size, specifically, it can be a structure similar to a triangular pyramid, a structure similar to a cone, etc. The specific shape of the working end 3 of the needle body 1 is not limited.

[0029] The sleeve 2 is sleeved outside the needle body 1 and slides along the axial direction of the needle body 1. In order to facilitate the operator to drive the sleeve 2 to slide relative to the needle body 1, a sleeve driving part 5 can be preferably protruded on the outer wall of the sleeve 2.

[0030] One end of the sleeve 2 is a limiting end, and the working end 3 of the needle body 1 is exposed from the limiting end of the sleeve 2; the limiting end of the sleeve 2 is provided with a limiting end surface 12. The limiting end surface 12 can be used to limit the depth during the opening operation to prevent the operator from opening the opening too deep during the opening operation.

[0031] When performing an opening operation, the length of the working end 3 of the needle body 1 is generally about 10 mm, so the first length can be set to about 10 mm. When performing an open circuit operation, the length of the working end 3 of the needle body 1 is generally about 40 mm, so the second length can be set to about 40 mm. Of course, the first length and the second length are actually designed according to the length of the working end 3 of the needle body 1 required in the intraoperative opening operation and the open circuit operation, and the first length and the second length can be adjusted according to actual conditions. For the convenience of the operator, the outer diameter of the sleeve 2 is generally about 10 mm, and the length of the sleeve 2 is generally about 150~200 mm; however, this embodiment does not limit the outer diameter and length of the sleeve 2, and can be adjusted according to actual conditions. The size of the grip 4 is generally designed according to the size of the palm and the convenience of the operator's palm gripping action, and its specific size is not limited; it should be noted that the grip 4 in the accompanying drawings is only for illustration, and the actual size of the grip 4 (relative to the needle body 1) is much larger than the size shown in the accompanying drawings. The various dimensions of the integrated pedicle screw placement channel-making tool shown above are mainly designed based on traditional open surgery; by adjusting the various dimensions of the integrated pedicle screw placement channel-making tool, it can also be designed as an instrument suitable for other surgeries such as minimally invasive channel placement surgery. For example, the integrated pedicle screw placement channel-making tool suitable for minimally invasive channel placement surgery has an overall shape of its sleeve 2 (the overall size of the sleeve 2 can also adjust the size of the internal needle body 1 accordingly when adjusted) that is more slender, for example, the length of the sleeve 2 can be set to about 350 mm.

[0032] A sliding limit guide structure may be provided between the sleeve 2 and the needle body 1, which can guide the sleeve 2 to slide on the needle body 1 and prevent the sleeve 2 from detaching from the needle body 1. Specifically, the sliding limit guide structure may include a guide slot 9 provided along the axial direction of the needle body 1 and a slider 8 slidably connected to the guide slot 9, wherein either the guide slot 9 or the slider 8 is provided on the sleeve 2, and the other is provided on the needle body 1. In this embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, the slider 8 is convexly arranged on the inner wall of the sleeve 2, and the slide groove is arranged on the outer wall of the needle body 1.

[0033] Preferably, when the slider 8 slides toward the working end 3 of the needle body 1 to the end of the guide slot 9, the length of the working end 3 of the needle body 1 exposed from the sleeve 2 is the first length; when the slider 8 slides toward the gripping portion 4 of the needle body 1 to the end of the guide slot 9, the length of the working end 3 of the needle body 1 exposed from the sleeve 2 is the second length. In this way, the sliding limit guide structure can also play an auxiliary role when the integrated pedicle screw placement channel creation tool changes its form (change between the open form and the open circuit form).

[0034] An open locking structure and an open-circuit locking structure are provided between the sleeve 2 and the needle body 1. The open locking structure is used to lock the sleeve 2 and the needle body 1 at a position where the length of the working end 3 of the needle body 1 exposed from the sleeve 2 is a first length. The open-circuit locking structure is used to lock the sleeve 2 and the needle body 1 at a position where the length of the working end 3 of the needle body 1 exposed from the sleeve 2 is a second length.

[0035] Specifically in this embodiment, the opening locking structure includes a limiter. The needle body 1 is provided with a first limiter surface 13 arranged in the direction of the working end 3, and the sleeve 2 is provided with a second limiter surface 14 arranged in the direction of the first limiter surface 13. The limiter is arranged between the first limiter surface 13 and the second limiter surface 14, and the two ends of the limiter are respectively in contact with the first limiter surface 13 and the second limiter surface 14; and the limiter can be taken out from between the first limiter surface 13 and the second limiter surface 14. In this way, the sleeve 2 is slid toward the working end 3 of the needle body 1 until the slider 8 abuts against the end of the guide slot 9, and then the limiter is placed between the first limiter surface 13 and the second limiter surface 14. At this time, the free end of the sleeve 2 in the axial direction of the needle body 1 is locked, and the integrated pedicle screw placement channel making tool can be used to perform the opening operation.

[0036] The limiting member may be a sleeve-like structure, which is sleeved on the needle body 1 and located between the first limiting surface 13 and the second limiting surface 14, and the limiting member includes two semicircular structures 6, which are assembled into a sleeve-like structure, so that the sleeve-like structure can be removed from the needle body 1. Of course, in other embodiments, the limiting member may also adopt other structures, and the specific structure of the limiting member is not limited.

[0037] The open circuit locking structure includes a first magnet 10 and a second magnet 11, wherein the first magnet 10 is arranged on the needle body 1, and the second magnet 11 is arranged on the sleeve 2. In the open circuit state, the limiter is taken out from between the first limiter surface 13 and the second limiter surface 14, and the first limiter surface 13 abuts against the second limiter surface 14, and the first magnet 10 and the second magnet 11 attract each other through magnetic force to fix the syringe and the needle body 1 at the position where the first limiter surface 13 abuts against the second limiter surface 14. When the opening operation is completed, the limiter is removed, and then the sleeve 2 is moved toward the gripping portion 4 of the needle body 1 until the first limiter surface 13 and the second limiter surface 14 are in contact. At this time, the first magnet 10 and the second magnet 11 attract each other, so that the sleeve 2 will no longer slide on the needle body 1, and then the integrated pedicle screw placement channel making tool can be used to perform the open circuit operation. Moreover, since the relative position between the sleeve 2 and the needle body 1 when the first limit surface 13 and the second limit surface 14 are abutted is achieved by the attractive magnetic force of the first magnet 10 and the second magnet 11, when the integrated pedicle screw insertion channel making tool is restored to an open shape, the sleeve 2 is driven by force to move toward the working end 3 of the needle body 1, and the sleeve 2 can be driven to slide toward the working end 3 of the needle body 1, and then when the slider 8 slides to the end of the guide groove 9, the limit member can be placed between the first limit surface 13 and the second limit surface 14 again.

[0038] Further, in another embodiment, if Figure 6 As shown, a third magnet 15 that is attracted to the first magnet 10 can be arranged at one end of the stopper facing the first limit surface 13, and a fourth magnet 16 that is attracted to the second magnet 11 can be arranged at one end of the stopper facing the second limit surface 14, so that when the integrated pedicle screw implantation channel making tool is in the open state, the semicircular structure 6 of the stopper is not easy to fall off from the needle body 1. When the stopper needs to be removed from the needle body 1, only a force that can overcome the magnetic force of attraction is needed to remove the stopper from the needle body 1. Of course, in some other embodiments, other methods can be used to prevent the stopper from falling off in the open state; or as in this embodiment, when operating the integrated pedicle screw implantation channel making tool for opening operation, after holding the gripping portion 4 in the palm of the hand, the fingers can extend to the outside of the stopper, and the fingers will apply a force radially inward to the needle body 1 to the stopper, so that the stopper will not fall off from the needle body 1.

[0039] In order to facilitate the operator to remove the semicircular structure 6 of the limiter from the needle body 1 , a limiter driving part 7 may preferably be convexly provided on the outer side wall of the semicircular structure 6 .

[0040] Example 2 See also Figures 7 to 9This embodiment provides an integrated pedicle screw placement channel making tool based on Example 1. The main difference between this embodiment and Example 1 lies in the difference in the sliding limit guide structure, the opening locking structure and the open circuit locking structure.

[0041] In this embodiment, the guide groove 9 in the sliding limit guide structure is arranged on the sleeve 2 , and the sliding block 8 is protruded from the outer side wall of the needle body 1 .

[0042] In this embodiment, the opening locking structure includes an opening slide groove 17, and the opening locking structure includes an open-circuit slide groove 18. The opening slide groove 17 is arranged along the circumferential direction of the needle body 1 and the opening slide groove 17 is connected to the guide slide groove 9, the slider 8 can slide into the opening slide groove 17, and when the slider 8 is in the opening slide groove 17, its degree of freedom in the axial direction of the needle body 1 is locked. The open-circuit slide groove 18 is arranged along the circumferential direction of the needle body 1 and the opening slide groove 17 is connected to the guide slide groove 9, the slider 8 can slide into the open-circuit slide groove 18, and when the slider 8 is in the open-circuit slide groove 18, its degree of freedom in the axial direction of the needle body 1 is locked.

[0043] In this embodiment, the opening shape of the integrated pedicle screw placement channel creation tool is as follows: Figure 7 As shown in the figure, the opening shape of the integrated pedicle screw placement channel creation tool is as follows Figure 8 As shown; it should be noted that Figure 7 , Figure 8 , Fig. 9 This is for illustration only, and the actual structure may differ from the illustration. When it is necessary to switch from the open configuration to the open configuration, first drive the sleeve 2 to rotate relative to the needle body 1 so that the slider 8 slides out of the open slot 17 and then to the guide slot 9, then drive the sleeve 2 to slide toward the gripping portion 4 of the needle body 1 until it slides to the end of the guide slot 9, and then drive the sleeve 2 to rotate relative to the needle body 1 so that the slider 8 enters the open slot 18 from the guide slot. When it is necessary to switch from the open configuration to the open configuration, first drive the sleeve 2 to rotate relative to the needle body 1 so that the slider 8 slides out of the open slot 18 and then to the guide slot 9, then drive the sleeve 2 to slide toward the working end 3 of the needle body 1 until it slides to the end of the guide slot 9, and then drive the sleeve 2 to rotate relative to the needle body 1 so that the slider 8 enters the open slot 17 from the guide slot.

[0044] Further, such as Figure 8 As shown, a fifth magnet 19 can be arranged on the slider 8, and a sixth magnet 20 and a seventh magnet 21 attracted to the fifth magnet 19 can be arranged on the sleeve 2 (it should be noted that Fig. 9The fifth magnet 19, the sixth magnet 20 and the seventh magnet 21 are not actually visible from the perspective shown in the figure, so their positions are indicated by dotted lines). When the sleeve 2 moves to the end of the slider 8 located at the open slot 17 away from the guide slot 9, the fifth magnet 19 and the sixth magnet 20 on the sleeve 2 attract each other, limiting the free end of the sleeve 2 in the circumferential direction of the needle body 1, so that the sleeve 2 will no longer rotate relative to the needle body 1. When the sleeve 2 moves to the end of the slider 8 located at the open slot 18 away from the guide slot 9, the fifth magnet 19 and the seventh magnet 21 on the sleeve 2 attract each other, limiting the free end of the sleeve 2 in the circumferential direction of the needle body 1, so that the sleeve 2 will no longer rotate relative to the needle body 1. And because the force limiting the free end of the sleeve 2 in the circumferential direction of the needle body 1 is an attractive magnetic force, when it is necessary to drive the sleeve 2 to rotate, it is only necessary to provide a force that can overcome the attractive magnetic force to rotate the sleeve 2.

[0045] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. An integrated pedicle screw placement channel creation tool, characterized in that: It comprises a needle body and a sleeve, wherein the sleeve is sleeved and slidably connected to the needle body, and one end of the needle body is a working end; The integrated pedicle screw placement channel-making tool has an open form and an open-circuit form; in the open form, the length of the working end of the sleeve that is locked to the needle body and exposed from the sleeve is a first length; In the open state, the portion of the working end of the needle body exposed from the sleeve is used to perform an opening operation on the target object; In the open-circuit form, the sleeve is locked to a second length of the working end of the needle body exposed from the sleeve, and the second length is greater than the first length; in the open-circuit form, the portion of the working end of the needle body exposed from the sleeve is used to perform an open-circuit operation on the target object.

2. The integrated pedicle screw placement channel making tool according to claim 1, characterized in that: A sliding limit guide structure is provided between the sleeve and the needle body, and the sliding limit guide structure includes a guide groove arranged along the axial direction of the needle body and a slider slidably connected to the guide groove, any one of the guide groove and the slider is provided on the sleeve, and the other is provided on the needle body.

3. The integrated pedicle screw placement channel making tool according to claim 2, characterized in that: An open locking structure and an open circuit locking structure are provided between the sleeve and the needle body; the open locking structure is used to lock the sleeve and the needle body at a position where the working end of the needle body is exposed from the sleeve at the first length; The open-circuit locking structure is used to lock the sleeve and the needle body at a position where the working end of the needle body is exposed from the sleeve at the second length.

4. The integrated pedicle screw placement channel making tool according to claim 3, characterized in that: The opening locking structure includes a limiting member; The needle body is provided with a first limit surface set toward the working end, and the sleeve is provided with a second limit surface set toward the first limit surface. The limit member is arranged between the first limit surface and the second limit surface, and the two ends of the limit member are respectively abutted against the first limit surface and the second limit surface; and the limit member can be taken out from between the first limit surface and the second limit surface.

5. The integrated pedicle screw placement channel making tool according to claim 4, characterized in that: When the two ends of the limiting member are respectively in contact with the first limiting surface and the second limiting surface, the sliding block slides to one end of the guide sliding groove.

6. The integrated pedicle screw placement channel making tool according to claim 4 or 5, characterized in that: The open-circuit locking structure includes a first magnet and a second magnet, the first magnet is arranged on the needle body, and the second magnet is arranged on the sleeve; in the open-circuit form, the limiting member is taken out from between the first limiting surface and the second limiting surface, and the first limiting surface abuts against the second limiting surface, and the first magnet and the second magnet attract each other through magnetic force to fix the syringe and the needle body at the position where the first limiting surface abuts against the second limiting surface.

7. The integrated pedicle screw placement channel making tool according to claim 3, characterized in that: The opening locking structure includes an opening slide groove, which is arranged along the circumferential direction of the needle body and is connected to the guide slide groove. The slider can slide into the opening slide groove, and when the slider is in the opening slide groove, its freedom in the axial direction of the needle body is locked.

8. The integrated pedicle screw placement channel creation tool according to claim 3, characterized in that: The opening locking structure includes an open-circuit slide groove, which is arranged along the circumferential direction of the needle body and is connected to the guide slide groove. The slider can slide into the open-circuit slide groove, and when the slider is in the open-circuit slide groove, its freedom in the axial direction of the needle body is locked.

9. The integrated pedicle screw placement channel making tool according to claim 1, characterized in that: One end of the sleeve is a limiting end, and the working end of the needle body is exposed from the limiting end of the sleeve; the limiting end of the sleeve is provided with a limiting end surface.

10. The integrated pedicle screw placement channel making tool according to claim 1, characterized in that: The needle body has two ends, one of which is the working end and the other end is provided with a gripping portion.

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