A device for expanding and shaping the vertebral body with a curved and degradable magnesium cage

Abstract

The present invention discloses a device for expanding and forming a vertebral body with a curved angle and degradable magnesium cage, which comprises a material storage cage part, a plastic part, a movable part, a guiding part and an inflatable part. The material storage cage part comprises an initial state and an expanded state, and forms a hollow spherical shell after being expanded. The plastic part is installed in the middle position of the material storage cage part, and can be deformed to squeeze the material storage cage part, and the material storage cage part in the initial state is switched to the expanded state. The movable part and the plastic part are connected, and bone cement can be delivered to the patient's vertebral body at a fixed point, so that the bone cement is evenly distributed, the probability of bone cement leakage during delivery is reduced, and the risk of fracture of adjacent vertebrae due to the increase of bone cement is reduced. The controllability of the surgical process is better, the error between the formed bone cement and the expected target is smaller, the treatment effect is better, the vertebral height recovery effect is obvious, the device is degradable, the internal support of the vertebral body is met, and there is no need to consider the removal problem.

Description

Technical Field

[0001] The invention relates to the technical field of spinal surgery medical instruments, in particular to a curved-angle degradable magnesium cage vertebral expansion and shaping device. Background Art

[0002] With the development of minimally invasive technology in spinal surgery, spinal surgery has gradually shifted from traditional open surgery to minimally invasive technology treatment. The method is to percutaneously inject bone cement (KMC) into the diseased vertebra to increase the strength of the vertebra, improve the stability of the spine, eliminate or relieve low back pain, and prevent the occurrence of vertebral fractures. This operation has the advantages of less trauma, no need for surgery, reduced patient pain, and shorter hospitalization time. Percutaneous kyphoplasty has made a breakthrough in the minimally invasive treatment of vertebral compression fractures. In recent years, various spinal implants have been continuously introduced. The application of percutaneous kyphoplasty in the treatment of vertebral compression fractures has achieved good clinical efficacy, and at the same time is conducive to reducing the complications caused by traditional percutaneous kyphoplasty.

[0003] Through patent search, it was found that the Chinese patent with publication number CN112790853B discloses a spinal bone cement injector with a secondary injection mechanism. The device is provided with a secondary injection mechanism, so that the bone cement liquid inside the pushing mechanism is pushed out, so that the device can detect the bone cement concentration during the operation, and prevent the bone cement from solidifying during the operation, which affects the operation.

[0004] However, according to investigation, in the prior art, bone cement is usually injected into the patient's vertebral body through a bone cement angled delivery system. During the process of injecting bone cement into the patient's vertebral body, the bone cement injected into the patient's vertebral body is uncontrollable and easily penetrates and loses in the patient's body, and the bone cement cannot be accurately delivered to the patient's vertebral body at a fixed point. The uncontrollability of bone cement leads to greater uncontrollability of the surgical process, and the error between the formed bone cement and the expected target is large. The treatment effect is easily lower than expected, and the vertebral height recovery effect is limited. The adjacent vertebral bodies will have an increased risk of fracture due to the influence of bone cement. For this reason, we propose a curved angle degradable magnesium cage vertebral expansion and forming device. Summary of the invention

[0005] The purpose of the present invention is to provide a curved-angle biodegradable magnesium cage vertebral expansion and shaping device to solve the problem proposed in the above background technology that during the process of injecting bone cement into the patient's vertebral body, the bone cement injected into the patient's vertebral body is uncontrollable and easily penetrates and loses in the patient's body, and the bone cement cannot be accurately delivered to the patient's vertebral body at a fixed point. The uncontrollability of the bone cement leads to greater uncontrollability of the surgical process, the error between the formed bone cement and the expected target is large, the treatment effect is easily lower than expected, the vertebral height recovery effect is limited, and the adjacent vertebral bodies will have an increased risk of fracture due to the influence of the bone cement.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for expanding and shaping a vertebral body with a curved degradable magnesium cage, comprising:

[0007] The material storage cage part includes an initial state and an expanded state, and forms a hollow spherical shell after the expansion;

[0008] The plastic part is installed in the middle of the material storage cage part, and can be deformed to squeeze the material storage cage part, so as to switch the material storage cage part in the initial state to the expanded state;

[0009] A moving part, the moving part is connected to the plastic part, and is used to drive the plastic part to move, and one end of the moving part connected to the plastic part is curved in an arc shape;

[0010] A guide portion, installed inside the moving portion, to limit the moving route of the moving portion;

[0011] The inflatable part is arranged on the moving part, and the inflatable part is connected to the plastic part, and is used to provide the plastic part with kinetic energy required for the extrusion action;

[0012] The plastic part, the inflatable part and the moving part form a magnesium cage vertebral body expansion former, and the material storage cage part is assembled on the head of the magnesium cage vertebral body expansion former.

[0013] Preferably, the storage cage portion includes a bone cement storage cage, the bone cement storage cage is made of magnesium, the bone cement storage cage is a tubular structure in its initial state, and is a hollow spherical shell in its expanded state.

[0014] Preferably, the plastic part includes a first hard tube head and a second hard tube head, the first hard tube head and the second hard tube head are both tubular structures, a plastic extrusion sac is arranged between the first hard tube head and the second hard tube head, the bone cement storage cover is assembled on the outside of the first hard tube head, the second hard tube head and the plastic extrusion sac, and one end of the bone cement storage cover is located on the outside of the first hard tube head, and the other end of the bone cement storage cover is located on the outside of the second hard tube head, the first hard tube head and the second hard tube head are hard materials, the plastic extrusion sac is flexible material, and a gas sealing component is arranged inside the second hard tube head at a position away from the first hard tube head.

[0015] Preferably, the movable part includes a tube end connection part, a hose connecting part, a bend pipe connection part and an adaptive guide wire part, the tube end connection part, the shaping and inflating part and the bend pipe connection part are connected in sequence, the hose connecting part is a hose, the bend pipe connection part is a hard bend pipe, the end of the bend pipe connection part away from the hose connecting part is connected to the first hard pipe head, the tube end connection part, the hose connecting part and the bend pipe connection part are internally provided with a tube cavity connected to the first hard tube head, the adaptive guide wire part is a metal soft wire, and the adaptive guide wire part extends through the tube cavity to the interior of the movable part and the plastic part.

[0016] Preferably, the inflatable portion includes a shaped inflatable portion, which is a hollow tubular structure with an inflation port opened inside, and one end of the shaped inflatable portion is fixedly connected to the tube end connecting portion, and the inflation port is connected to the tube cavity to form an inflation channel connected to the first hard tube head.

[0017] Preferably, the outer diameters of the first hard tube head and the second hard tube head gradually decrease from one end close to the elbow connection portion to one end away from the elbow connection portion, and the outer diameter of the second hard tube head close to the elbow connection portion is smaller than the outer diameter of the first hard tube head away from the elbow connection portion, and the inner diameter of the bone cement storage cage gradually decreases from one end close to the elbow connection portion to one end away from the elbow connection portion;

[0018] The outer diameters of the first hard tube head and the second hard tube head at the ends away from the curved pipe connection part are both small end face outer diameters, and the outer diameters of the first hard tube head and the second hard tube head at the ends close to the curved pipe connection part are both large end face outer diameters. The inner diameter of the bone cement storage cover at the end away from the curved pipe connection part is the small end face inner diameter, and the inner diameter of the bone cement storage cover close to the curved pipe connection part is the large end face inner diameter. The small end face inner diameter of the bone cement storage cover is smaller than the large end face outer diameter of the second hard tube head, and the small end face inner diameter of the bone cement storage cover is larger than the small end face outer diameter of the second hard tube head. The large end face inner diameter of the bone cement storage cover is smaller than the large end face outer diameter of the first hard tube head, and the large end face inner diameter of the bone cement storage cover is larger than the small end face outer diameter of the first hard tube head.

[0019] Preferably, one end of the bone cement storage cage close to the elbow connection portion is fixedly connected to a first annular hoop with the same diameter as its large end face, and one end of the bone cement storage cage away from the elbow connection portion is fixedly connected to a second annular hoop with the same diameter as its small end face, the first annular hoop and the second annular hoop are both ring-shaped and made of iron, and a leakage-proof component is fixedly connected to the second annular hoop.

[0020] Preferably, the anti-leakage component includes a plurality of anti-leakage shielding plates in a circular array, the anti-leakage shielding plate is an arc-shaped isosceles triangle plate, and the bottom edge of the isosceles triangle plate is fixedly connected to the second annular hoop, and the plurality of the isosceles triangle plates form an arc-shaped circular plate.

[0021] Preferably, the gas blocking assembly includes a sealing airbag, a back-force tie rod and a ball-blocking ball. The sealing airbag is a ring-shaped airbag, and the outer wall of the airbag is connected to the inner wall of the second hard tube head. A threading hole is provided in the middle position of the sealing airbag, and the adaptive guide wire portion passes through the threading hole. The side wall of the sealing airbag facing the threading hole is convex, and the convexity is semicircular. A ball-blocking ball is connected to the sealing airbag through two back-force tie rods. The ball-blocking ball is spherical, and the outer diameter of the ball-blocking ball is larger than the inner diameter of the threading hole.

[0022] Preferably, the guide portion is an adaptive guide wire portion, the adaptive guide wire portion is a soft metal wire, and the adaptive guide wire portion extends through the lumen to the interior of the movable portion and the plastic portion.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention arranges a storage cage at the vertebral body of the patient, and then transports the bone cement into the interior of the storage cage, thereby achieving fixed-point delivery of bone cement to the vertebral body of the patient and evenly distributing the bone cement.

[0025] 2. The present invention limits bone cement by setting a storage cage, which can reduce the probability of bone cement leakage during transportation, prevent it from flowing to adjacent vertebrae, and reduce the risk of adjacent vertebrae fractures due to bone cement. The bone cement is relatively stable in forming, the surgical process is better controllable, and the error between the formed bone cement and the expected target is small, which can ensure the treatment effect, effectively increase the vertebral strength of patients, improve the stability of the spine, eliminate or alleviate low back pain, prevent the occurrence of vertebral fractures, and the vertebral height recovery effect is obvious.

[0026] Third, the material of the material storage cage is magnesium, which is degradable and can support the inside of the vertebral body without taking out the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall cutaway structure of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the initial state of the material storage cage part of the present invention;

[0030] Figure 4It is a schematic diagram of the cutaway structure of the initial state of the material storage cage portion of the present invention;

[0031] Figure 5 It is a cut-away side view of the initial state of the storage cage portion of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the material storage cage portion of the present invention in an expanded state;

[0033] Figure 7 It is a schematic diagram of the cross-section structure of the material storage cage portion of the present invention in an expanded state;

[0034] Figure 8 It is a cut-away side view of the storage cage portion of the present invention in an expanded state;

[0035] Fig. 9 It is a structural schematic diagram of the spherical shell of the present invention;

[0036] Fig.10 It is a schematic diagram of the cross-section structure of the spherical shell of the present invention;

[0037] Fig.11 is a cut-away side view of the spherical shell of the present invention;

[0038] Fig.12 It is a schematic diagram of the cutaway structure of the gas blocking assembly of the present invention;

[0039] Fig.13 is a cut-away side view of the gas blocking assembly of the present invention;

[0040] Fig.14 It is a schematic diagram of the initial state of the material storage cage part of the present invention being converted into an expanded state;

[0041] Fig.15 It is a schematic diagram of the plastic part of the present invention being removed from the interior of the material storage cage part.

[0042] Fig.16 It is a schematic structural diagram of another embodiment of the present invention.

[0043] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0044] 1. Tube end connection part; 2. Shaping and inflating part; 3. Hose connecting part; 4. Bend tube connection part; 5. Adaptive guide wire part; 6. First hard tube head; 7. Second hard tube head; 8. Plastic extrusion sac; 9. First annular hoop; 10. Second annular hoop; 11. Bone cement storage cover; 12. Leak-proof shielding sheet; 13. Sealing airbag; 14. Back-force tie rod; 15. Ball-blocking sac. DETAILED DESCRIPTION

[0045] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0046] Example

[0047] See also Figures 1 to 16 The present invention provides a technical solution: a device for expanding and forming a curved-angle degradable magnesium cage vertebra, comprising a material storage cage part, a plastic part, an inflatable part, a moving part and a guide part, wherein the plastic part, the inflatable part and the moving part form a magnesium cage vertebra expansion former, and the material storage cage part is assembled on the head of the magnesium cage vertebra expansion former, i.e., the outside of the plastic part;

[0048] Among them, see Figure 9-11 As shown, the storage cage portion includes an initial state and an expanded state. It is in the initial state during the process of entering the patient's body, and can be expanded to the expanded state after entering the patient's body. After expansion, it forms a hollow spherical shell and can self-degrade in the human body. The shell is located on the opposite side of the vertebral body, and bone cement can be injected into the shell to form inside the shell. During the initial forming process of the bone cement, the shell will self-expand. When the shell is completely degraded, the bone cement contacts the patient's vertebral body, so as to increase the vertebral strength of the patient, improve the stability of the spine, eliminate or alleviate low back pain, and prevent the occurrence of vertebral fractures.

[0049] For details, please refer to Figure 5 and Fig.11 As shown, the storage cage portion includes a bone cement storage cage 11. The bone cement storage cage 11 is initially a tubular structure made of magnesium, which has good ductility and heat dissipation. It can be squeezed into a hollow spherical shell after being squeezed by the plastic part, that is, it is in an expanded state. It is one of the essential elements of the human body and can be automatically degraded inside the human body.

[0050] Among them, see Figure 3-5 As shown, the plastic part is installed in the middle position of the material storage cage part, and can be deformed to squeeze the material storage cage part, switching the material storage cage part in the initial state to the expanded state, so as to control the change of the state of the material storage cage part.

[0051] Please refer to Figure 4-5 and Figure 6-7As shown, the plastic part includes a first hard tube head 6 and a second hard tube head 7, both of which are tubular structures, a plastic extrusion sac 8 is arranged between the first hard tube head 6 and the second hard tube head 7, a bone cement storage cover 11 is assembled on the outside of the first hard tube head 6, the second hard tube head 7 and the plastic extrusion sac 8, and one end of the bone cement storage cover 11 is located on the outside of the first hard tube head 6, and the other end of the bone cement storage cover 11 is located on the outside of the second hard tube head 7, the first hard tube head 6 and the second hard tube head 7 are hard materials, and their ductility is poor and the deformation performance is poor, the plastic extrusion sac 8 is a flexible material, preferably rubber, which has good ductility and can be deformed by force, and a gas sealing component is arranged at a position inside the second hard tube head 7 away from the first hard tube head 6, which is used to seal the opening of the second hard tube head 7 away from one end of the first hard tube head 6;

[0052] At this time, the first hard tube head 6, the second hard tube head 7, the plastic extrusion sac 8 and the gas blocking component form a cylindrical structure with an opening at one end, through which the interior of the cylindrical structure can be inflated to increase the air pressure inside the plastic part. Since the first hard tube head 6 and the second hard tube head 7 are not deformable, when the air pressure inside the plastic part increases, the plastic extrusion sac 8 will be propped up, so that the middle part of the plastic extrusion sac 8 gradually bulges outward, and the bone cement storage cover 11 is squeezed. Figure 6-8 As shown, after the extrusion is completed, the plastic extrusion bag 8 has a memory function and will automatically return to its initial state, while the bone cement storage cage 11 does not have a memory function and will not automatically return to its original state after its deformation is completed. At this time, the plastic part can be pulled out from the inside of the deformed bone cement storage cage 11.

[0053] Among them, see Figure 1-2 As shown, the moving part and the plastic part are connected, which is used to drive the plastic part to move, and one end where the moving part and the plastic part are connected is curved in an arc shape;

[0054] For details, please refer to Figure 2 As shown, the moving part includes a tube end connection part 1, a hose connecting part 3, a bend connecting part 4 and an adaptive guide wire part 5, the tube end connection part 1, the shaping and inflating part 2 and the bend connecting part 4 are connected in sequence, wherein the hose connecting part 3 is a hose with adaptive deformation performance, the bend connecting part 4 is a hard bend, and one end of the bend connecting part 4 away from the hose connecting part 3 is connected to the first hard pipe head 6, and a tube cavity connected to the first hard pipe head 6 is opened inside the tube end connection part 1, the hose connecting part 3 and the bend connecting part 4;

[0055] The guide part is installed inside the moving part to limit the moving route of the moving part by itself. The guide part is an adaptive guide wire part 5, which is a soft metal wire that can be extended into the patient's body through the puncture assembly. The adaptive guide wire part 5 extends through the lumen to the inside of the moving part and the plastic part.

[0056] At this time, the adaptive guide wire part 5 is extended into the patient's body through the puncture assembly, and then the puncture assembly is removed, and the remaining accessories can be installed on the outside of the adaptive guide wire part 5, and then the remaining accessories can be extended into the patient's body until the second hard tube head 7 is opposite to the patient's vertebral body, and the installation is completed.

[0057] Here, the puncture assembly is a mature existing technology, and the puncture assembly will not be introduced in detail here.

[0058] Please refer again to Figure 1-2 As shown, the inflatable part is arranged on the moving part, and the inflatable part is connected to the plastic part, so as to provide the plastic part with the kinetic energy required for the extrusion action.

[0059] The inflatable portion includes a shaping inflatable portion 2, which is a hollow tubular structure with an inflation port opened inside. One end of the shaping inflatable portion 2 is fixedly connected to the tube end connecting portion 1, and the inflation port and the tube cavity are connected to form an inflation channel connected to the first hard tube head 6. At this time, by connecting the first hard tube head 6 and the shaping inflatable portion 2, the first hard tube head 6 can be inflated through the inflation channel to provide kinetic energy for the extrusion action for the plastic portion.

[0060] See also Figure 2 and Figure 4-5 As shown, the specific structure of each component of the plastic part is introduced in detail here. The outer diameters of the first hard tube head 6 and the second hard tube head 7 are gradually reduced from one end close to the elbow connection part 4 to the end away from the elbow connection part 4, and the outer diameter of the second hard tube head 7 close to the elbow connection part 4 is smaller than the outer diameter of the first hard tube head 6 away from the elbow connection part 4. The inner diameter of the bone cement storage cage 11 is gradually reduced from one end close to the elbow connection part 4 to the end away from the elbow connection part 4.

[0061] Moreover, the outer diameters of the first hard tube head 6 and the second hard tube head 7 at the ends away from the elbow connection part 4 are both small end face outer diameters, which are respectively recorded as Dmin1 and Dmin2, the outer diameters of the first hard tube head 6 and the second hard tube head 7 at the ends close to the elbow connection part 4 are both large end face outer diameters, which are respectively recorded as Dmax1 and Dmax2, the inner diameter of the bone cement storage cover 11 at the end away from the elbow connection part 4 is the small end face inner diameter, which is recorded as Dmin3, and the inner diameter of the bone cement storage cover 11 at the end close to the elbow connection part 4 is the large end face inner diameter, which is recorded as The inner diameter of the small end face of the bone cement storage cage 11 is smaller than the outer diameter of the large end face of the second hard tube head 7, and the inner diameter of the small end face of the bone cement storage cage 11 is larger than the outer diameter of the small end face of the second hard tube head 7, that is, Dmin2<Dmin3<Dmax2, the inner diameter of the large end face of the bone cement storage cage 11 is smaller than the outer diameter of the large end face of the first hard tube head 6, and the inner diameter of the large end face of the bone cement storage cage 11 is larger than the outer diameter of the small end face of the first hard tube head 6, that is, Dmin3<Dmax3<Dmax3.

[0062] Therefore, due to the limitation of its size, the small end face of the second hard tube head 7 can extend to the outside of the bone cement storage cage 11 through the small end face of the bone cement storage cage 11. At the same time, since the outer diameter of the large end face of the second hard tube head 7 is smaller than the inner diameter of the small end face of the bone cement storage cage 11, the small end face of the bone cement storage cage 11 will be stuck in the middle part of the outer side of the second hard tube head 7, and the small end face of the first hard tube head 6 can extend to the inside of the bone cement storage cage 11 through the large end face of the bone cement storage cage 11, and since the outer diameter of the large end face of the first hard tube head 6 is larger than the inner diameter of the large end face of the bone cement storage cage 11, the large end face of the bone cement storage cage 11 will be stuck outside the first hard tube head 6 The middle part of the side prevents the bone cement storage cage 11 from moving toward the direction close to the elbow connection part 4 during the movement. Since the device will move in the direction from the tube end connection part 1 to the elbow connection part 4 during the movement, at this time, the elbow connection part 4 will provide thrust for the first hard tube head 6 and the second hard tube head 7, so that the first hard tube head 6 and the second hard tube head 7 are always located inside the bone cement storage cage 11, avoiding the probability of the second hard tube head 7 falling off from the bone cement storage cage 11. At the same time, when the device is disassembled, the second hard tube head 7 and the plastic extrusion bag 8 can be directly removed from the inside of the bone cement storage cage 11 to complete the disassembly.

[0063] Also, see Figure 6-11As shown, in order to avoid large dimensional changes in the inner diameters of the large end face and the small end face of the bone cement storage cage 11, the end of the bone cement storage cage 11 close to the elbow connection part 4 is fixedly connected to a first annular hoop 9 with the same diameter as its large end face, and the end of the bone cement storage cage 11 away from the elbow connection part 4 is fixedly connected to a second annular hoop 10 with the same diameter as its small end face. The first annular hoop 9 and the second annular hoop 10 are both ring-shaped, and their material is preferably iron. Compared with magnesium, iron has greater hardness and is not easy to deform. It is also one of the essential elements of the human body and can be automatically degraded inside the human body, with less impact on human health.

[0064] In order to further reduce the leakage of bone cement entering the shell through the small end opening of the bone cement storage cage 11, a leakage prevention component is fixedly connected to the second annular hoop 10, which is used to seal the opening of the small end after the bone cement storage cage 11 forms a spherical shell. The leakage prevention component includes a plurality of leakage prevention shielding plates 12 in an annular array. The leakage prevention shielding plate 12 is an arc-shaped isosceles triangle plate, and the bottom edge of the isosceles triangle plate is fixedly connected to the second annular hoop 10. The plurality of isosceles triangle plates form an arc-shaped circular plate, and the leakage prevention shielding plate 12 is an arc-shaped isosceles triangle plate. The sheet 12 is a human-degradable material with a memory function. When the second annular hoop 10 is located outside the second hard tube head 7, the second hard tube head 7 will lift the leak-proof shielding sheet 12 to separate the leak-proof shielding sheet 12, allowing the small end surface opening of the bone cement storage cage 11 to leak out, allowing the second hard tube head 7 to extend out. When the second hard tube head 7 and the second annular hoop 10 are separated, the leak-proof shielding sheet 12 will automatically reset. Multiple leak-proof shielding sheets 12 form an arc-shaped circular plate to seal the small end surface opening of the bone cement storage cage 11.

[0065] See also Figure 3 and 12 -13, the specific structure of the gas blocking component is described in detail here. The gas blocking component includes a sealing airbag 13, a back-force tie rod 14 and a baffle ball 15. The sealing airbag 13 is a ring-shaped airbag, and the outer wall of the airbag is connected to the inner wall of the second hard tube head 7. A threading hole is opened in the middle position of the sealing airbag 13, and the adaptive guide wire part 5 passes through the threading hole to complete the movement of the device. The side wall of the sealing airbag 13 facing the threading hole is convex, and the convexity is semicircular, as shown in Fig.13As shown, the sealing airbag 13 is connected to a baffle ball 15 through two back-force tie rods 14. The baffle ball 15 is spherical, and the outer diameter of the baffle ball 15 is larger than the inner diameter of the threading hole. At this time, when the adaptive wire guide portion 5 enters the threading hole, the baffle ball 15 will be lifted up to separate the baffle ball 15 and the threading hole, so that the threading hole can be exposed for the adaptive wire guide portion 5 to extend. When the adaptive wire guide portion 5 is moved out of the threading hole, the back-force tie rods 14 will drive the baffle ball 15 to reset, so that the baffle ball 15 is located on the upper part of the threading hole to seal the threading hole.

[0066] When in use: use a scalpel to cut the skin, insert the puncture assembly into the pedicle, then pull out the puncture inner core, insert the adaptive guide wire part 5, then pull out the puncture cannula, insert the dilator along the adaptive guide wire part 5, then insert the bone drill, drill the vertebral surface, drill through the vertebral surface, then pull out the bone drill, insert the circuit opener, open the balloon channel, and pull out the circuit opener after the opening is completed;

[0067] The material storage cage is assembled on the head of the magnesium cage vertebral expansion former, and then the magnesium cage vertebral expansion former is installed on the outside of the adaptive guide wire part 5. The magnesium cage vertebral expansion former is moved in a perspective state, so that the magnesium cage vertebral expansion former drives the material storage cage to extend into the patient's body along the route of the adaptive guide wire part 5 until the second hard tube head 7 is opposite to the patient's vertebral body, and the installation is completed;

[0068] Then, the adaptive guide wire part 5 is pulled out, and the pressure pump is connected to the shaping and inflating part 2, so that the first hard tube head 6 can be inflated through the inflation channel to provide kinetic energy for the extrusion action for the plastic part, and the air pressure inside the plastic part is increased. Since the first hard tube head 6 and the second hard tube head 7 are not deformable, when the air pressure inside the plastic part is increased, the plastic extrusion capsule 8 will be propped up, and the middle part of the plastic extrusion capsule 8 will gradually bulge outward, and the bone cement storage cage 11 will be squeezed into a hollow spherical shell;

[0069] After the spherical shell is formed, the plastic part is pulled out from the deformed bone cement storage cage 11, and the magnesium cage vertebral expansion former is removed from the patient's body, leaving the spherical shell in the vertebral body. When the second hard tube head 7 and the second annular hoop 10 are separated, the leak-proof shielding sheet 12 will automatically reset, and the plurality of leak-proof shielding sheets 12 form an arc-shaped circular plate to seal the small end surface opening of the bone cement storage cage 11;

[0070] The spherical shell is then connected to the bone cement angle delivery system for bone cement delivery. After the delivery is completed, it is pulled out and the operation is basically completed.

[0071] In summary, the present invention provides a storage cage portion at the vertebral body of the patient, and then transports bone cement into the interior of the storage cage portion, so as to achieve fixed-point delivery of bone cement to the patient's vertebral body and make the bone cement evenly distributed. By providing the storage cage portion to limit the bone cement, the probability of bone cement leakage during transportation can be reduced, and it will not flow to the adjacent vertebral body, thereby reducing the risk of adjacent vertebral body fracture due to the increase of bone cement. The bone cement forming is relatively stable, the controllability of the surgical process is better, the error between the formed bone cement and the expected target is small, the treatment effect can be guaranteed, the vertebral strength of the patient is effectively increased, the stability of the spine is improved, the waist pain is eliminated or alleviated, the occurrence of vertebral fracture is prevented, and the vertebral height recovery effect is obvious. By selecting the material of the storage cage portion as magnesium, the material is degradable, the internal support of the vertebral body is met, and there is no need to consider the removal problem.

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention are understood according to the specific circumstances. In the description of this specification, the description of the reference terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A device for expanding and shaping a vertebral body with a curved degradable magnesium cage, characterized in that: Included are: The material storage cage part includes an initial state and an expanded state, and forms a hollow spherical shell after the expansion; The plastic part is installed in the middle of the material storage cage part, and can be deformed to squeeze the material storage cage part, so as to switch the material storage cage part in the initial state to the expanded state; A moving part, the moving part is connected to the plastic part, and is used to drive the plastic part to move, and one end of the moving part connected to the plastic part is curved in an arc shape; A guide portion, installed inside the moving portion, to limit the moving route of the moving portion; The inflatable part is arranged on the moving part, and the inflatable part is connected to the plastic part, and is used to provide the plastic part with kinetic energy required for the extrusion action; The plastic part, the inflatable part and the moving part form a magnesium cage vertebral expansion former, and the material storage cage part is assembled on the head of the magnesium cage vertebral expansion former; The storage cage portion includes a bone cement storage cage (11), the material of the bone cement storage cage (11) is magnesium, the bone cement storage cage (11) is a tubular structure in its initial state, and is a hollow spherical shell in its expanded state; The plastic part comprises a first hard tube head (6) and a second hard tube head (7), the first hard tube head (6) and the second hard tube head (7) are both tubular structures, a plastic extrusion sac (8) is arranged between the first hard tube head (6) and the second hard tube head (7), the bone cement storage cage (11) is mounted on the outside of the first hard tube head (6), the second hard tube head (7) and the plastic extrusion sac (8), and one end of the bone cement storage cage (11) is located on the outside of the first hard tube head (6), and the other end of the bone cement storage cage (11) is located on the outside of the second hard tube head (7), the first hard tube head (6) and the second hard tube head (7) are hard materials, the plastic extrusion sac (8) is flexible material, and a gas blocking component is arranged inside the second hard tube head (7) at a position away from the first hard tube head (6); The movable part comprises a tube end connection part (1), a hose connecting part (3), a bend tube connection part (4) and an adaptive guide wire part (5); the tube end connection part (1), the shaping and inflating part (2) and the bend tube connection part (4) are connected in sequence; the hose connecting part (3) is a hose; the bend tube connection part (4) is a hard bend tube; one end of the bend tube connection part (4) away from the hose connecting part (3) is connected to a first hard tube head (6); a tube cavity connected to the first hard tube head (6) is provided inside the tube end connection part (1), the hose connecting part (3) and the bend tube connection part (4); the adaptive guide wire part (5) is a metal soft wire; the adaptive guide wire part (5) extends through the tube cavity to the inside of the movable part and the plastic part.

2. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 1, characterized in that: The inflatable portion includes a shaped inflatable portion (2), which is a hollow tubular structure with an inflatable port provided inside. One end of the shaped inflatable portion (2) is fixedly connected to the tube end connecting portion (1), and the inflatable port is connected to the tube cavity to form an inflatable channel connected to the first hard tube head (6).

3. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 1, characterized in that: The outer diameters of the first hard tube head (6) and the second hard tube head (7) gradually decrease from one end close to the elbow connection part (4) to one end away from the elbow connection part (4), and the outer diameter of the second hard tube head (7) at one end close to the elbow connection part (4) is smaller than the outer diameter of the first hard tube head (6) at one end away from the elbow connection part (4), and the inner diameter of the bone cement storage cage (11) gradually decreases from one end close to the elbow connection part (4) to one end away from the elbow connection part (4); The outer diameters of the first hard tube head (6) and the second hard tube head (7) at the ends away from the curved tube connection portion (4) are both small end face outer diameters, the outer diameters of the first hard tube head (6) and the second hard tube head (7) at the ends close to the curved tube connection portion (4) are both large end face outer diameters, the inner diameter of the end of the bone cement storage cage (11) away from the curved tube connection portion (4) is the small end face inner diameter, and the inner diameter of the end of the bone cement storage cage (11) close to the curved tube connection portion (4) is the large end face inner diameter. The inner diameter of the small end face of the bone cement storage cage (11) is smaller than the outer diameter of the large end face of the second hard tube head (7), and the inner diameter of the small end face of the bone cement storage cage (11) is larger than the outer diameter of the small end face of the second hard tube head (7); the inner diameter of the large end face of the bone cement storage cage (11) is smaller than the outer diameter of the large end face of the first hard tube head (6), and the inner diameter of the large end face of the bone cement storage cage (11) is larger than the outer diameter of the small end face of the first hard tube head (6).

4. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 3, characterized in that: The bone cement storage cage (11) is fixedly connected to a first annular hoop (9) having the same diameter as the large end face thereof at one end close to the curved pipe connection portion (4), and is fixedly connected to a second annular hoop (10) having the same diameter as the small end face thereof at one end away from the curved pipe connection portion (4). Both the first annular hoop (9) and the second annular hoop (10) are ring-shaped and made of iron. The second annular hoop (10) is fixedly connected to an anti-leakage component.

5. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 4, characterized in that: The anti-leakage component comprises a plurality of anti-leakage shielding sheets (12) in an annular array, wherein the anti-leakage shielding sheet (12) is an arc-shaped isosceles triangle plate, and the bottom edge of the isosceles triangle plate is fixedly connected to the second annular hoop (10), and the plurality of isosceles triangle plates form an arc-shaped circular plate.

6. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 5, characterized in that: The gas blocking component comprises a sealing airbag (13), a back-force tie rod (14) and a ball-blocking ball (15); the sealing airbag (13) is a ring-shaped airbag, and the outer wall of the airbag is connected to the inner wall of the second hard tube head (7); a threading hole is provided in the middle of the sealing airbag (13), and the adaptive guide wire portion (5) passes through the threading hole; the sealing airbag (13) is convexly arranged on the side wall facing the threading hole, and the convexity is semicircular; the sealing airbag (13) is connected to the ball-blocking ball (15) via two back-force tie rods (14); the ball-blocking ball (15) is spherical, and the outer diameter of the ball-blocking ball (15) is greater than the inner diameter of the threading hole.

7. The device for expanding and shaping a vertebral body with a curved degradable magnesium cage according to claim 1, characterized in that: The guide part is an adaptive guide wire part (5), and the adaptive guide wire part (5) is a soft metal wire. The adaptive guide wire part (5) extends through the lumen to the inside of the moving part and the plastic part.

Images