Thoracolumbar segment centrum puncture injection device capable of preventing bone cement from permeating backwards

Abstract

The invention provides a thoracolumbar segment centrum puncture injection device capable of preventing bone cement from permeating backwards, and belongs to the technical field of bone cement puncture injection devices. Comprising a thoracolumbar segment centrum body, puncture needle bodies are arranged on the two sides of the thoracolumbar segment centrum body, puncture pipelines are arranged on the sides, close to the thoracolumbar segment centrum body, of the puncture needle bodies, first channels are formed in the puncture needle bodies, and partition pieces are fixedly connected to the inner walls of the first channels; and the protection mechanism is used for preventing bone cement from seeping towards the rear part of the thoracolumbar segment vertebral body during injection. By arranging the protection mechanism, bone cement can be injected at the thoracolumbar segment vertebral compression fracture position, the spinal canal direction can be protected, the bone cement is prevented from leaking backwards to damage the spinal cord and nerves, and the opened protection mechanism is fixed and locked in cooperation with the rotating locking mechanism. And the protection mechanism is continuously kept in an unfolded state for protection use.

Description

Technical Field

[0001] The invention relates to the technical field of bone cement puncture injection devices, and in particular to a thoracolumbar vertebral body puncture injection device for preventing bone cement from leaking back. Background Art

[0002] Thoracolumbar vertebral osteoporotic compression fractures are a common bone disease, especially in the elderly and postmenopausal women. It is usually caused by decreased bone density and bone quality, and decreased bone strength. Fractures occur under the action of slight external force or even without obvious external force. Clinically, the main clinical manifestation is chest / lower back pain, with or without lower limb neurological symptoms. In clinical applications, thoracolumbar vertebral osteoporotic compression fractures require injection of bone cement to strengthen the vertebral body for treatment.

[0003] However, when using bone cement injection to treat osteoporotic vertebral compression fractures, there is a risk of bone cement leakage. During the bone cement injection process, the most dangerous leakage direction is leakage into the posterior spinal canal. This is because the spinal canal contains important structures such as the spinal cord and nerve roots. Once bone cement leaks into the spinal canal, it may cause compression, thermal damage and toxic effects on the spinal cord and nerve roots, leading to severe neurological damage, paraplegia, and even reverse bone cement toxic reactions, which are life-threatening. In order to prevent this dangerous leakage, the integrity of the four walls of the vertebral body, especially the integrity of the posterior wall of the vertebral body, should be carefully evaluated during surgery, because an incomplete posterior wall of the vertebral body will increase the risk of bone cement leakage into the spinal canal, and most of the existing related surgical instruments cannot avoid bone cement leakage to the posterior when injecting bone cement into the incomplete posterior wall of the vertebral body. Therefore, the present application provides a thoracolumbar vertebral puncture injection device that prevents bone cement from leaking backward to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a thoracolumbar vertebral puncture injection device that prevents the back leakage of bone cement. By setting up a protective mechanism, not only can the protective mechanism further protect the thoracolumbar vertebrae close to the spinal canal to prevent bone cement leakage from damaging the patient's spinal cord and nerves, but also the protective mechanism can be fixed and locked after being opened in conjunction with the use of a rotating locking mechanism, so that the protective mechanism can be continuously maintained in the expanded state for protective use. The above setting can solve the problem of leakage of the thoracolumbar vertebrae close to the spinal canal.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A thoracolumbar vertebral puncture injection device for preventing the back leakage of bone cement comprises a thoracolumbar vertebral body, a puncture needle body is arranged on both sides of the thoracolumbar vertebral body, a puncture channel is arranged on the side of the puncture needle body close to the thoracolumbar vertebral body, a first channel is opened in the puncture needle body, and a separator is fixedly connected to the inner wall of the first channel; a protective mechanism, which is used to prevent the back leakage of bone cement to the thoracolumbar vertebral body during injection, and the protective mechanism is connected to the puncture needle body; a rotation locking mechanism, which is used to limit and fix the structure in the protective mechanism, and the rotation locking mechanism is connected to the puncture needle body.

[0007] Optionally, the protective mechanism includes a support tube installed in the puncture needle body, the support tubes are four and are respectively arranged on both sides of the thoracolumbar vertebral body, wherein one end of two of the support tubes close to the top of the puncture needle body is fixedly connected with an end plate, a second channel is opened in the support tube, a second opening is opened on the side of the puncture needle body close to the thoracolumbar vertebral body, a connecting tube is provided in the second channel, and the four connecting tubes are respectively arranged in four support tubes, wherein the ends of two of the connecting tubes on one side are fixedly connected with a first connecting block, and the ends of two of the connecting tubes on the other side are fixedly connected with a second connecting block matched with the shape of the first connecting block, a thin sheet is installed between the two support tubes on the same side, and a third weakened portion is provided on the side of the support tube close to the thoracolumbar vertebral body.

[0008] Optionally, the second channel and the connecting pipe are both made of steel, the inner diameter of the second channel is equal to the inner diameter of the connecting pipe, the separator is an arc-shaped elastic structure, and the separator is made of plastic.

[0009] Optionally, a second guide portion is provided on a side of the second connecting block close to the first connecting block, lightweight grooves are equidistantly arranged in an annular shape on the second connecting block, and the second connecting block is made of plastic material.

[0010] Optionally, a second limiting portion is provided on the second connecting block, a second weakened portion is provided on the second connecting block, and a movable groove is provided on one side of the support tube close to the thoracolumbar vertebral body.

[0011] Optionally, the rotation locking mechanism includes a threaded groove, in which a threaded block matching the shape of the threaded groove is installed, and the threaded block is provided with wire drawing. A limiting plate is fixedly connected to the two support tubes near the top of the puncture needle body, and a first opening is provided on the side of the limiting plate away from the support tube. The separating plate is rotatably connected to a first gear via a rotating shaft, and one side of the two support tubes near the top of the puncture needle body is rotatably connected to a second gear via a rotating shaft.

[0012] Optionally, a fixing block is fixedly connected to the threaded block, an outer wall edge of the fixing block is arc-shaped, an outer wall of the fixing block is provided with anti-slip grooves, and the outer wall of the threaded block is rough.

[0013] Optionally, a first guide portion is provided on a side of the separator close to the second opening, and a first limit portion is provided on a side of the separator close to the second opening.

[0014] Optionally, a first weakened portion is provided on a side of the separator close to the second opening, a first recess is provided on a side of the separator close to the second opening, and a torsion spring body is provided on a side of the wire drawing close to the rotating shaft in the first gear close to the separator.

[0015] Optionally, a shaft groove matching the shape of the rotating shaft on the second gear is formed on the side of the separator close to the second gear, and the width of the cavity formed by the side of the separator close to the support tube and the inner wall of the first channel is the same as the outer diameter of the support tube.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting up the protection mechanism, not only can the protection mechanism further protect the thoracic and lumbar vertebrae close to the spinal canal to prevent bone cement leakage from damaging the patient's nerves, but also the protection mechanism can be fixed and locked after being opened in conjunction with the use of the rotating locking mechanism, so that the protection mechanism can be continuously kept in the expanded state for protection, and after use, the various mechanisms can be folded and quickly taken out through the first channel. The coordinated use of the structures makes the minimally invasive surgery of bone cement injection better in protection, effectively preventing the problem of disordered flow of bone cement after injection to burn the spinal cord, thereby ensuring the safety of the patient, and the device has a simple structure, is convenient and quick to use, and has good practicality and low production cost, which is easy to promote and use.

[0018] By arranging a support tube and a connecting tube in the protective mechanism, not only can the connecting tube be used to extend the support tube, thereby facilitating the unfolding and use of the thin sheet, but the connecting tube also strengthens the support tube during the process of the support tube penetrating the first channel and the thoracolumbar vertebral body. The provision of the connecting tube improves the overall strength of the support tube. The support tube and the connecting tube can drive the thin sheet to pass through the first channel and quickly move to a desired position for use. After the support tubes arranged opposite to each other are connected together, the support tubes and the connecting tubes are deformed and unfolded, driving the thin sheet to unfold, so that the thin sheet forms a protective surface on the side close to the vertebral canal, effectively preventing bone cement injection. The structure is simple, and the coordinated use of the structures effectively increases the practicability of the protective mechanism.

[0019] By providing a first connecting block and a second connecting block in the protective mechanism, not only can the two connecting pipes arranged opposite to each other be firmly connected together and not separated when subjected to supporting tension, but also the guidance of the second guide portion on the second connecting block can be used to make the first connecting block slide into the second connecting block more quickly along the inclined surface of the second guide portion when the first connecting block and the second connecting block are connected and fixed, and the lightweight groove provided makes the deformation ability of the second connecting block, which has the deformation ability itself, better, and the second weakened portion provided makes it easier for the second connecting block to deform at that location, and the second limiting portion plays a good limiting role on the first connecting block, and the coordinated use of the structures enables the first connecting block to be further quickly and stably installed in the second connecting block, and the structure is simple, which makes the use effect of the protective mechanism better.

[0020] By providing a threaded block and a fixed block in the rotating locking mechanism, not only can the threaded block and the fixed block be used to limit the installation position of the support tube, but the support tube can also be more accurately connected, fixed and installed according to the preset position. After the support tube is installed to the specified position and when the threaded block is rotated to the required position, the fixed block and the limiting piece are staggered, which not only limits the position of the support tube, but also quickly limits the expansion angle of the support tube without the need for an additional locking structure. The coordinated use of the present structures effectively increases the practicability of the device.

[0021] By arranging a wire drawing, a first gear and a second gear in the rotation locking mechanism, not only can the wire drawing wrapped on the threaded block be tightened to pull the first gear, but also because the side of the wire drawing close to the thoracic and lumbar vertebral body is fixed to the outer wall of the first gear close to the bottom, when the wire drawing is pulled, the first gear is subjected to a force in the direction of the end plate and upward, thereby causing the first gear to rotate clockwise, and the second gear meshing with the first gear is caused to rotate counterclockwise by utilizing the gear action, thereby causing the top support tube to deform and bend upward, thereby causing the thin sheet folded between the two adjacent support tubes to be unfolded for use, and the structure is simple, and the coordinated use of the structures further makes the use effect of the rotation locking mechanism better.

[0022] In summary, the device, in conjunction with the use of the various components therein, can not only achieve rapid and comprehensive protection of the rear portion close to the spinal canal, but also has convenient protection operation and good protection performance. During the protection operation, the protection mechanism is stably deployed and will not be automatically retracted. After the bone cement injection is completed, the relevant components of the protection mechanism are removed from the first channel. The device has a simple structure, is quick and easy to use, has good practicality, and has a low production cost, making it easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a thoracolumbar vertebral puncture injection device for preventing the back leakage of bone cement;

[0025] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 3 for Figure 2 The enlarged structural diagram at B in the middle;

[0027] Figure 4 A schematic diagram of the three-dimensional cross-sectional structure of a thoracolumbar vertebral puncture injection device for preventing the back leakage of bone cement;

[0028] Figure 5 for Figure 4 The enlarged structural diagram at C in the middle;

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the puncture needle body and the support tube;

[0030] Figure 7 for Figure 6 The enlarged structural diagram at D in the middle;

[0031] Figure 8 It is a schematic diagram of the three-dimensional cross-sectional structure of the puncture needle body and the support tube;

[0032] Fig. 9 for Figure 8 The enlarged structural diagram at E in the middle;

[0033] Fig.10 for Fig. 9 The enlarged structural diagram at F in the middle;

[0034] Fig.11 It is a schematic diagram of the matching structure of the puncture needle body and the support tube;

[0035] Fig.12 It is a schematic diagram of the matching structure of the connecting pipe and the supporting pipe;

[0036] Fig.13 for Fig.12 Enlarged structural diagram at G in the middle.

[0037] Reference numerals:

[0038] 1. Thoracolumbar vertebral body; 2. Puncture needle body; 3. First channel; 4. Separator; 5. Support tube; 6. End plate; 7. Threaded groove; 8. Threaded block; 9. Fixing block; 10. Wire drawing; 11. Limiting plate; 12. First opening; 13. Second opening; 14. First guide part; 15. First limiting part; 16. First recessed part; 17. First weakened part; 18. First gear; 19. Second gear; 20. Second channel; 21. Connecting tube; 22. First connecting block; 23. Second connecting block; 24. Second guiding part; 25. Lightweight groove; 26. Second limiting part; 27. Second weakened part; 28. Movable groove; 29. ​​Thin sheet; 30. Third weakened part; 31. Torsion spring body.

[0039] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0040] The following is a detailed description of a thoracolumbar vertebral puncture injection device for preventing bone cement back-seepage provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0041] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it should be within the knowledge of technicians in the relevant field whether or not such features, structures or characteristics are explicitly described in conjunction with other embodiments.

[0042] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0043] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0044] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0045] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a thoracolumbar vertebral puncture injection device for preventing the back leakage of bone cement, comprising a thoracolumbar vertebral body 1, a puncture needle body 2 is provided on both sides of the thoracolumbar vertebral body 1, a side of the puncture needle body 2 close to the thoracolumbar vertebral body 1 is a puncture channel, a first channel 3 is opened in the puncture needle body 2, and a separator 4 is fixedly connected to the inner wall of the first channel 3; a protective mechanism, the protective mechanism is used to prevent the back leakage of bone cement to the thoracolumbar vertebral body 1 during injection, and the protective mechanism is connected to the puncture needle body 2; a rotating locking mechanism, the rotating locking mechanism is used to limit and fix the structure in the protective mechanism, the rotating locking mechanism is connected to the puncture needle body 2, the separator 4 is arc-shaped, and the separator 4 divides the first channel 3 into two cavity channels of different sizes, the larger one The channel is used for injecting bone cement, and the smaller cavity channel is used to set up a protective mechanism. Under the premise of the original anti-leakage operation, the device can further protect the thoracic and lumbar vertebrae close to the spinal canal by using the protective mechanism to prevent bone cement leakage from damaging the patient's nerves, and the protective mechanism can be fixed and locked after being opened in conjunction with the use of a rotating locking mechanism, so that the protective mechanism can be continuously maintained in the expanded state for protective use, and after use, the various mechanisms can be folded and quickly removed through the first channel 3. The coordinated use of the structures makes the minimally invasive surgery of bone cement injection better in protection and ensures the safety of the patient. The details are described below. In addition, the device has a simple structure, is convenient and quick to use, and has good practicality and low production cost, which is easy to promote and use.

[0046] like Figures 5 to 13As shown, the protective mechanism includes a support tube 5 installed in the puncture needle body 2, and the support tube 5 is four and is respectively arranged on both sides of the thoracolumbar vertebral body 1 opposite to each other, wherein one end of the two support tubes 5 close to the top of the puncture needle body 2 is fixedly connected with an end piece 6, a second channel 20 is provided in the support tube 5, and a second opening 13 is provided on one side of the puncture needle body 2 close to the thoracolumbar vertebral body 1, a connecting tube 21 is provided in the second channel 20, and the connecting tube 21 is four and is respectively arranged in the four support tubes 5, wherein the ends of the two connecting tubes 21 on one side are fixedly connected with a first connecting block 22, and the ends of the two connecting tubes 21 on the other side are fixedly connected with a second connecting block 23 whose shape matches the first connecting block 22, and the two support tubes 5 on the same side are fixedly connected with each other. A thin sheet 29 is installed between the support tubes 5, a third weakened portion 30 is provided on the side of the support tube 5 close to the thoracolumbar vertebral body 1, two support tubes 5 close to each other form a group, one of the support tubes 5 in a group is provided with a magnetic block on the side close to the thoracolumbar vertebral body 1, and the other is provided with an iron sheet at the same position, and the two support tubes 5 in a group are fixedly connected on one side close to the end piece 6, so that a group of support tubes 5 can move together in the thoracolumbar vertebral body 1 in one direction, the first connecting block 22 is spherical, and a limiting block is provided on the side of the connecting tube 21 away from the thoracolumbar vertebral body 1, and the connecting tube 21 does not separate from the second channel 20 during the movement, and the outer diameter of the second connecting block 23 is the same as the inner diameter of the second channel 20, and the second channel 20 is connected to the second The outward deformation limit of the connecting block 23 can make the second connecting block 23 more stably limit the first connecting block 22 in the cavity formed therein. The structure allows the support tube 5 to pass through the first channel 3 and pass out from the second opening 13, and then gently press or knock on the end piece 6 to allow the support tube 5 to continue to be inserted into the first channel 3. The initial state of the support tube 5 is set to be an arc shape. The support tube 5 has a certain deformation ability. When the support tube 5 is inserted into the first channel 3, it is limited by the separator 4 and the first channel 3, and the support tube 5 slides in the first channel 3 close to a straight line. When the support tube 5 passes through the second opening 13, it is no longer limited by the position of the first channel 3 and the separator 4, and the support tube 5 rebounds to its original arc, so that After passing through the second opening 13, the support tube 5 extends toward the direction close to the spinal canal, and the two groups of oppositely arranged support tubes 5 are respectively pushed toward the center position of the thoracolumbar vertebral body 1 until the first connecting block 22 is clamped in the second connecting block 23, so that the two oppositely arranged support tubes 5 are connected together, and then the top support tube 5 in the two groups of support tubes 5 is rotated respectively with the use of the rotation locking mechanism, so that the two support tubes 5 are bent toward the top of the thoracolumbar vertebral body 1. The third weakened portion 30 is provided to make the support tube 5 more easily deformed near the third weakened portion 30. The specific use of the rotation locking mechanism is described in detail below. During the deployment process, the connecting tube 21 in the two support tubes 5 slides in the second channel 20 under the influence of the supporting tension.The first connecting block 22 and the second connecting block 23 firmly connect the two connecting tubes 21 at the top so that they will not separate when subjected to tension. The deformation of the two supporting tubes 5 and the connecting tube 21 at the top drives the thin sheet 29 to unfold, so that the thin sheet 29 forms a protective surface on the side close to the spinal canal, effectively preventing the problem of leakage to the spinal canal side during the bone cement injection process. The structure is simple, and the coordination between the structures makes the device more practical.

[0047] like Figures 11 to 13 As shown, the support tube 5 and the connecting tube 21 are both made of steel, the inner diameter of the second channel 20 is equal to the inner diameter of the connecting tube 21, the separator 4 is an arc-shaped elastic structure, the separator 4 is made of plastic material, the second connecting block 23 is provided with a second guide portion 24 on the side close to the first connecting block 22, the second connecting block 23 is provided with a lightweight groove 25 at equal intervals in an annular manner, the second connecting block 23 is made of plastic material, the second connecting block 23 is provided with a second limiting portion 26, the second connecting block 23 is provided with a second weakened portion 27, the support tube 5 is provided with a movable groove 28 on the side close to the thoracolumbar vertebral body 1, the top and bottom edges of the thin sheet 29 are respectively fixed on the two adjacent connecting tubes 21, and are inserted into the movable groove 28. This structure utilizes the fact that the steel material has a certain hardness and can produce a certain deformation under the action of external force, so that the support tube 5 and the connecting tube 21 can stably move and deform in the desired direction when in use, thereby achieving the effect of facilitating the operation and use of the device, and the separator The sheet 4 is made of plastic material, which can not only play a good limiting effect on the support tube 5, but also under the deformation trend of the support tube 5, the support tube 5 can be deformed along its arc-shaped protrusion with the support tube 5, so that the limiting effect of the partition sheet 4 on the support tube 5 is better. When the first connecting block 22 and the second connecting block 23 arranged at the ends of the two connecting tubes 21 are connected, the first connecting block 22 can slide into the second connecting block 23 more quickly along the inclined surface of the second guide portion 24 by means of the guidance of the second guide portion 24, and the lightweight groove 25 provided makes the deformation ability of the second connecting block 23, which has the deformation ability itself, better. The second weakened portion 27 is provided to make the second connecting block 23 more easily deformable at this place, and the second limiting portion 26 is used to play a good limiting effect on the first connecting block 22. The coordinated use of the structures enables the first connecting block 22 to be further quickly and stably installed in the second connecting block 23, and the structure is simple, and the structure makes the use effect of the protective mechanism better.

[0048] like Figures 1 to 10As shown, the rotation locking mechanism includes a thread groove 7, a thread block 8 matching the shape of the thread groove 7 is installed in the thread groove 7, a wire drawing 10 is provided on the thread block 8, a limiting plate 11 is fixedly connected to the two support tubes 5 near the top of the puncture needle body 2, a first opening 12 is provided on the side of the limiting plate 11 away from the support tube 5, a first gear 18 is rotatably connected to the separator 4 through a rotating shaft, and a second gear 19 is rotatably connected to one side of the two support tubes 5 near the top of the puncture needle body 2 through a rotating shaft, and a torsion spring is provided on the side of the rotating shaft near the separator 4 in the wire drawing 10 near the first gear 18. The present structure is such that after the protective mechanism is installed to the desired position, the limiting piece 11 passes through the fixing block 9 from the first opening 12 and is clamped on the threaded block 8, and the threaded block 8 and the fixing block 9 are used to further limit the installation position of the support tube 5, so that the support tube 5 can be more accurately connected, fixed and installed according to the preset position. After the support tube 5 is installed to the specified position, the second gear 19 is just meshed with the first gear 18 installed on the separator 4, and the first gear 18 and the second gear 19 are used in combination to further close the support tube 5 to the thoracic and lumbar vertebrae. The threaded block 8 is limited on one side of the body 1, and then the threaded block 8 is turned by hand, so that the threaded block 8 is rotated in the thread groove 7 by the action of the thread, and the friction force generated by the limiting plate 11 on the threaded block 8 is used to slowly rotate the threaded block 8, so that the wire drawing 10 wound on the threaded block 8 is tightened, thereby pulling the first gear 18. Since the side of the wire drawing 10 close to the thoracolumbar vertebral body 1 is fixed to the outer wall of the side of the first gear 18 close to the bottom, when the wire drawing 10 is pulled, the first gear 18 is subjected to a force in the direction of the end plate 6 and upward, so that the first gear 18 rotates clockwise, and the gear action is used to make the first gear 18 rotate with the end plate 6. The second gear 19 meshing with the first gear 18 rotates counterclockwise, and the torsion spring body 31 in the second gear 19 is deformed, so that the top support tube 5 is deformed and bent upward, so that the thin sheet 29 folded between the two adjacent support tubes 5 is unfolded for use. When the threaded block 8 is rotated to the required position, the fixed block 9 and the limiting sheet 11 are staggered, which not only limits the position of the support tube 5, but also quickly limits the unfolding angle of the support tube 5. No additional locking structure is required. The coordinated use of the present structures effectively increases the practicability of the device, and the structure is simple, and it is convenient and quick to use.

[0049] like Figures 3 to 10As shown, the threaded block 8 is fixedly connected to a fixing block 9, the outer wall edge of the fixing block 9 is arc-shaped, and the outer wall of the fixing block 9 is provided with anti-slip grooves, the outer wall of the threaded block 8 is rough, the side of the separator 4 close to the second opening 13 is provided with a first guide portion 14, the side of the separator 4 close to the second opening 13 is provided with a first limiting portion 15, the side of the separator 4 close to the second opening 13 is provided with a first weakened portion 17, the side of the separator 4 close to the second opening 13 is provided with a first recess 16, and the side of the separator 4 close to the second gear 19 is provided with a shaft groove adapted to the shape of the rotating shaft on the second gear 19 The width of the cavity formed by the side of the separator 4 close to the support tube 5 and the inner wall of the first channel 3 is the same as the outer diameter of the support tube 5. The fixing block 9 is two outer walls of the two sides of the threaded block 8 respectively arranged opposite to each other. The present structure makes the rotation of the threaded block 8 easier by utilizing the setting of the fixing block 9, and the first guide portion 14 is used to guide the support tube 5 so that when it penetrates the first channel 3 close to the side of the thoracolumbar vertebral body 1, the first guide portion 14 can be used to more accurately align with the second opening 13, and the first limiting portion 15 is used to simply limit the support tube 5, so that the support tube 5 can be more stably pressed. The second gear 19 moves along the prescribed route, and when the second gear 19 is aligned with the first gear 18 by using the first recess 16 and the first weakened portion 17, the first recess 16 at the position of the separator 4 is more likely to deform, thereby allowing the second gear 19 to pass through the first gear 18 smoothly. After passing through the first gear 18, the first recess 16 rebounds to the initial state, causing the second gear 19 to move toward the separator 4, and then the support tube 5 is gently swung, so that the first gear 18 and the second gear 19 are meshed together. The separator 4 is provided with a rotating shaft on the second gear 19 on one side close to the second gear 19. The shaft groove with matching shape allows the second gear 19 to maintain flexible rotation after meshing with the first gear 18, so that the corresponding top support tube 5 can be deformed and expanded upward when the second gear 19 rotates. The width of the cavity formed by the side of the separator 4 close to the support tube 5 and the inner wall of the first channel 3 is the same as the outer diameter of the support tube 5, so that the support tube 5 will not rotate when moving in the separator 4, thereby ensuring that the angle of the support tube 5 passing through the second opening 13 can be in a predetermined direction. The structure is simple, and the coordinated use of the structures further makes the use of the rotation locking mechanism better.

[0050] The workflow of the technical solution of the present invention is as follows:

[0051] When in use, first puncture and fix the puncture needle body 2 on the thoracic and lumbar vertebral body 1, and then pass the support tube 5 through the first channel 3. The separator 4 and the inner wall of the first channel 3 limit the trajectory of the support tube 5. The separator 4 is made of plastic material, which can not only play a good limiting effect on the support tube 5, but also under the deformation trend of the support tube 5, the support tube 5 can produce a certain deformation along its circular arc-shaped protrusion with the support tube 5, so that the limiting effect of the separator 4 on the support tube 5 is better.

[0052] By utilizing the guidance of the first guide portion 14, the support tube 5 is more accurately aligned with the second opening 13 when it penetrates into the first channel 3 close to the side of the thoracolumbar vertebral body 1, and the first limiting portion 15 is used to simply limit the support tube 5, so that the support tube 5 can move more stably along the prescribed route, pass through the first channel 3 and then pass out from the second opening 13. During the movement of the support tube 5 in the first channel 3, the second gear 19 is driven to move, and the first recess 16 and the first weakened portion 17 on the separator 4 are arranged, so that when the second gear 19 moves to be aligned with the first gear 18, the first recess 16 of the separator 4 is deformed, so that the second gear 19 passes through the first gear 18 smoothly. After passing through the first gear 18, the first recess 16 rebounds to the initial state, causing the second gear 19 to move toward the separator 4, and then the support tube 5 is gently swung to make the first gear 18 and the second gear 19 mesh together.

[0053] An axial groove matched with the shape of the rotating shaft on the second gear 19 is opened on the side of the separator 4 close to the second gear 19, so that the second gear 19 can maintain flexible rotation after meshing with the first gear 18, so that the corresponding top support tube 5 can be deformed and expanded upward when the second gear 19 rotates. The width of the cavity formed by the side of the separator 4 close to the support tube 5 and the inner wall of the first channel 3 is the same as the outer diameter of the support tube 5, so that the support tube 5 will not rotate when moving in the separator 4, thereby ensuring that the angle of the support tube 5 passing through the second opening 13 can be in a predetermined direction, and then the end piece 6 is gently pressed or knocked to allow the support tube 5 to continue to be inserted into the thoracolumbar vertebral body 1.

[0054] Since the initial state of the support tube 5 is set to be an arc shape, the support tube 5 has a certain deformation ability. When the support tube 5 is inserted into the first channel 3, it is limited by the separator 4 and the first channel 3, and the support tube 5 slides in the first channel 3 close to a straight line. When the support tube 5 passes through the second opening 13, the position of the first channel 3 and the separator 4 is no longer limited, and the support tube 5 rebounds to the original arc, so that the support tube 5 extends toward the direction close to the vertebral canal after passing through the second opening 13. The two groups of oppositely arranged support tubes 5 are pushed toward the center position of the thoracolumbar vertebral body 1 respectively. When the second connecting blocks 12 are oppositely arranged, the support tubes 5 are pushed toward the center position of the thoracolumbar vertebral body 1. When the first connecting block 23 and the first connecting block 22 are close to each other, the first connecting block 22 can slide into the second connecting block 23 more quickly along the inclined surface of the second guiding portion 24 by means of the guidance of the second guiding portion 24, and the lightweight groove 25 provided enables the second connecting block 23, which has the deformation ability itself, to have a better deformation ability, and the second weakened portion 27 provided makes it easier for the second connecting block 23 to deform there, and the second limiting portion 26 plays a good limiting role on the first connecting block 22, so that the first connecting block 22 is clamped in the second connecting block 23, so that the supporting tubes 5 arranged opposite to each other are connected together.

[0055] Then, the fixing block 9 is turned by hand to drive the thread block 8 to rotate, so that the thread block 8 is rotated in the thread groove 7 under the action of the thread, and the friction force generated by the limit plate 11 on the thread block 8 is used to slowly rotate the thread block 8, so that the wire drawing 10 wound on the thread block 8 is tightened, thereby pulling the first gear 18. Since the side of the wire drawing 10 close to the thoracic and lumbar vertebral body 1 is fixed to the outer wall of the side of the first gear 18 close to the bottom, when the wire drawing 10 is pulled, the first gear 18 is subjected to a force in the direction of the end plate 6 and upward, so that the first gear 18 rotates clockwise, and the first gear 18 rotates clockwise. The gear action causes the second gear 19 meshing with the first gear 18 to rotate counterclockwise, and the torsion spring body 31 in the second gear 19 is deformed, so that the top support tube 5 is deformed and bent upward. In the process of the support tube 5 being forced to bend upward, the connecting tube 21 in the two top support tubes 5 slides in the second channel 20 under the influence of the supporting tension. The first connecting block 22 and the second connecting block 23 firmly connect the two top connecting tubes 21 together so that they will not separate when subjected to the supporting tension, and the connecting tube 21 will never leave the second channel 20 during the movement.

[0056] The outer diameter of the second connecting block 23 is the same as the inner diameter of the second channel 20. The second channel 20 limits the outward deformation of the second connecting block 23, so that the second connecting block 23 can more stably confine the first connecting block 22 in the cavity formed therein. The deformation and expansion of the two top support tubes 5 and the connecting tube 21 drive the thin film 29 to expand rapidly. The two oppositely expanded thin films 29 are tightly fitted together under the influence of tension, and the height of the thin film 29 is slightly smaller than the thickness of a thoracolumbar vertebral body 1, so that the thin film 29 forms a protective surface on the side close to the spinal canal, which effectively prevents the problem of leakage to the side of the spinal canal during the bone cement injection process.

[0057] When the threaded block 8 is rotated to the desired position, the fixing block 9 and the limiting plate 11 are staggered, which not only limits the position of the support tube 5, but also quickly limits the expansion angle of the support tube 5 without the need for an additional locking structure. Then, bone cement is injected into another channel formed by the first channel 3 and the separator 4. During the injection of bone cement, frequent fluoroscopic monitoring is performed to ensure the correct distribution of bone cement and timely detection of leakage.

[0058] At the same time, the timing of bone cement injection is usually selected during the period when bone cement is drawn into wire, that is, when bone cement is in the shape of toothpaste. At this time, bone cement has both stability and certain fluidity, which can reduce the risk of leakage. At the same time, when injecting bone cement, it is necessary to inject and retreat at the same time to try to make the bone cement evenly dispersed in the vertebral body. If bone cement is found to leak outside the vertebral body, the injection must be stopped immediately. After the injection is completed, when the bone cement is basically formed, the thread block 8 is rotated again to relax the wire drawing 10, and the torsion spring body 31 in the second gear 19 rebounds to pull the wire drawing 10 back to the initial position, the first gear 18 and the second gear 19 rotate, and the support tube 5 rebounds to close the thin sheet 29, and then the support tube 5 is pulled to take out the support tube 5, the connecting tube 21 and the thin sheet 29. The structure of the device is simple and it is convenient and quick to use.

[0059] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A thoracolumbar vertebral puncture injection device for preventing bone cement back-seepage, characterized in that: It comprises a thoracolumbar vertebral body, wherein a puncture needle body is provided on both sides of the thoracolumbar vertebral body, a puncture channel is provided on the side of the puncture needle body close to the thoracolumbar vertebral body, a first channel is provided in the puncture needle body, and a separator is fixedly connected to the inner wall of the first channel; A protection mechanism, the protection mechanism is used to prevent the bone cement from extravasating toward the rear of the thoracolumbar vertebral body during injection, and the protection mechanism is connected to the puncture needle body; A rotation locking mechanism is used to limit and fix the structure in the protection mechanism, and the rotation locking mechanism is connected to the puncture needle body.

2. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 1, characterized in that: The protective mechanism includes a support tube installed in the puncture needle body, the support tubes are four and respectively arranged on both sides of the thoracolumbar vertebral body, wherein one end of the two support tubes close to the top of the puncture needle body is fixedly connected with an end plate, a second channel is opened in the support tube, a second opening is opened on the side of the puncture needle body close to the thoracolumbar vertebral body, a connecting tube is arranged in the second channel, and the four connecting tubes are respectively arranged in four support tubes, wherein the ends of the two connecting tubes on one side are fixedly connected with a first connecting block, and the ends of the two connecting tubes on the other side are fixedly connected with a second connecting block matched with the shape of the first connecting block, a thin sheet is installed between the two support tubes on the same side, and a third weakened portion is provided on the side of the support tube close to the thoracolumbar vertebral body.

3. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 2, characterized in that: The second channel and the connecting pipe are both made of steel, the inner diameter of the second channel is equal to the inner diameter of the connecting pipe, the separator is an arc-shaped elastic structure, and the separator is made of plastic.

4. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 2, characterized in that: A second guide portion is provided on one side of the second connecting block close to the first connecting block, and lightweight grooves are equidistantly arranged in an annular shape on the second connecting block. The second connecting block is made of plastic material.

5. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 2, characterized in that: A second limiting portion is provided on the second connection block, a second weakened portion is provided on the second connection block, and a movable groove is provided on one side of the support tube close to the thoracolumbar vertebral body.

6. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 2, characterized in that: The rotation locking mechanism includes a threaded groove, in which a threaded block matching the shape of the threaded groove is installed, and the threaded block is provided with a drawing wire. A limiting plate is fixedly connected to the two support tubes near the top of the puncture needle body, and a first opening is opened on the side of the limiting plate away from the support tube. The separator is rotatably connected to a first gear via a rotating shaft, and one side of the two support tubes near the top of the puncture needle body is rotatably connected to a second gear via a rotating shaft.

7. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 6, characterized in that: A fixing block is fixedly connected to the threaded block, the outer wall edge of the fixing block is arc-shaped, and the outer wall of the fixing block is provided with anti-slip grooves, and the outer wall of the threaded block is rough.

8. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 6, characterized in that: A first guide portion is provided on one side of the separator close to the second opening, and a first limit portion is provided on one side of the separator close to the second opening.

9. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 6, characterized in that: A first weakened portion is provided on one side of the separator close to the second opening, a first recess is provided on one side of the separator close to the second opening, and a torsion spring body is provided on one side of the wire drawing close to the rotating shaft in the first gear close to the separator.

10. The thoracolumbar vertebral puncture injection device for preventing back leakage of bone cement according to claim 6, characterized in that: A shaft groove matching the shape of the rotating shaft on the second gear is formed on one side of the separator close to the second gear, and a cavity formed by one side of the separator close to the support tube and the inner wall of the first channel has the same width as the outer diameter of the support tube.

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