Bone cement directional decompression injection microcontroller applied to percutaneous vertebroplasty

Abstract

The invention discloses a bone cement directional decompression injection microcontroller applied to percutaneous vertebroplasty. The bone cement directional decompression injection microcontroller comprises a mixing barrel, a micro-injection barrel, an injection hose combination and an injection hose fixing and pushing device. A first injection pipe, a second injection pipe and an exhaust pipe are arranged on the mixing barrel, and a micro stirring motor is arranged at the top of the mixing barrel; three independently controlled branch pipes are arranged at the bottom end of the micro-injection cylinder, a push rod cylinder is fixed at the top of the micro-injection cylinder, a push rod is arranged in the push rod cylinder, and a micro push motor is arranged at the top of the push rod cylinder; the mixing cylinder is communicated with the bottom end of the micro-injection cylinder through a communicating pipe and is provided with a manual three-way valve; the injection hose combination comprises an injection hose and a pressure-reducing jacket hose; the injection hose fixing and pushing device comprises a bone flitch, an L-shaped guide tube and a pushing device. Excessive pressurization is avoided in the injection process, part of blood plasma, bone marrow and the like can leak out of the pressure reduction holes for pressure reduction, bone cement can flow in the direction of pulling the pressure reduction outer sleeve hose, and the flowing direction of the bone cement can be conveniently controlled.

Description

Technical Field

[0001] The invention relates to the technical field of bone cement push injection, and in particular to a bone cement directional decompression push injection microcontroller used in percutaneous vertebroplasty. Background Art

[0002] With the advent of an aging society, the incidence of osteoporosis has increased year by year, and the incidence of osteoporotic fractures (OPF) has also increased. Common sites of OPF are the spine, hip, and distal forearm. In particular, osteoporotic fractures in the spine can often occur in the patient's inadvertent small movements or injuries, resulting in severe pain and movement disorders, which has brought huge economic and living burdens to the society and the patient's family. In recent years, percutaneous bone cement perfusion vertebroplasty has been used to treat such injuries, and has achieved certain results, with the advantages of fast pain relief and good results. However, with the increase in the number of clinical medical cases, it has also been found that this type of technology has certain defects. This type of equipment is used in sets, and a set of equipment can only be applied to one vertebra, which is expensive. Moreover, during the process of injecting bone cement, the bone marrow will be pressurized or the bone cement will leak from the bone, resulting in high pressure in the vertebral body. In particular, during the process of injecting bone cement, there is no pressure relief device, and the pressure in the vertebral body will increase sharply, increasing the risk of leakage. The most feared thing during bone cement injection is that the bone cement leaks out of the vertebral body or enters the blood vessels, causing serious complications. There are two major risk factors for leakage. One is that the direction of bone cement flow is uncontrollable and it is easy to flow along the fracture fissure. The other is the high pressure inside the vertebral body. When bone cement is injected, the space inside the vertebral body is occupied, causing a sudden increase in pressure. The pressure in the fissures and veins is relatively small, and the pressure difference causes the bone cement to flow from the high-pressure area to the low-pressure area. This is the most fundamental factor for leakage. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the present invention is to provide a bone cement directional decompression push microcontroller used in percutaneous vertebroplasty, which solves the problems of bone cement causing pressure increase in the bone and leakage during push injection.

[0004] According to the present invention, a bone cement directional decompression push-in microcontroller used in percutaneous vertebroplasty comprises a mixing cylinder, a micro-injection cylinder, a push-injection hose assembly and a push-injection hose fixing and pushing device; The mixing barrel is symmetrically provided with a first injection pipe and a second injection pipe communicating with the inside of the mixing barrel on both side walls near the bottom end, and the first injection pipe and the second injection pipe are both provided with a first manual flow valve at a segment position near the mixing barrel, and the mixing barrel is provided with an exhaust pipe on the side wall near the top end and a manual knob valve on the exhaust pipe, and a micro-stirring motor is provided on the top of the mixing barrel, and the rotating shaft of the micro-stirring motor passes through the inside of the mixing barrel and extends to a position near the bottom, and a spiral mixing paddle is provided on the rotating shaft inside the mixing barrel; The micro-injection barrel is provided with three independently controlled branch pipes at the bottom end, the branch pipes are communicated with the inside of the micro-injection barrel and a second manual flow valve is provided on the branch pipes, the micro-injection barrel is provided with an air release pipe communicated with the inside of the micro-injection barrel on the side wall near the top position, the end of the air release pipe connected to the micro-injection barrel is a trumpet-shaped end, the trumpet-shaped end is a trumpet mouth that gradually expands from top to bottom, a rubber piston is plugged in the micro-injection barrel, when the rubber piston is at the top of the micro-injection barrel, the rubber piston will block half of the trumpet mouth of the trumpet-shaped end, a push rod barrel is fixed on the top of the micro-injection barrel, a push rod is provided in the push rod barrel and the bottom end of the push rod movably penetrates the top wall of the micro-injection barrel and is fixedly connected to the rubber piston, a micro-propelling motor is provided on the top of the push rod barrel, a screw is connected to the rotating shaft of the micro-propelling motor, and the screw screw is inserted from the top of the push rod into the inside thereof; The mixing cylinder is connected to the bottom end of the micro-injection cylinder by a connecting pipe, and an external branch pipe is provided on the connecting pipe, and a manual three-way valve is provided at the position of the external branch pipe of the connecting pipe; The push-injection hose combination includes a push-injection hose and a decompression outer jacket hose, the decompression outer jacket hose is sleeved on the rear half of the push-injection hose, a decompression gap is left between the inner wall of the decompression outer jacket hose and the outer wall of the push-injection hose, the push-injection hose is exposed at the push-injection outlet end by a length of -mm from the tail end of the decompression outer jacket hose, the decompression outer jacket hose is provided with two circles of decompression holes at the tail end segment, and the decompression holes are communicated with the decompression gap, the decompression outer jacket hose is provided with a negative pressure hose on the top side wall, and the negative pressure hose is communicated with the decompression gap, and the top end of the push-injection hose is sleeved on the corresponding branch pipe as needed; The push-in hose fixing and pushing device includes a bone plate, an L-shaped guide tube and a pushing device for pushing the decompression outer sleeve hose to move. The L-shaped guide tube passes through the center position of the bone plate at the bottom position and is fixed. The transverse tube of the L-shaped guide tube is parallel to the bone plate. The top end of the L-shaped guide tube is connected to the output port of the pushing device. The decompression outer sleeve hose is inserted from the input port of the pushing device and penetrates into the L-shaped guide tube, and finally the L-shaped guide tube is exposed. The bone plate is attached to the bone and installed on the bone with bone nails.

[0005] In some embodiments of the present invention, the bottoms of the mixing cylinder and the micro-injection cylinder are both conical bottoms, the inner bottoms of the mixing cylinder and the micro-injection cylinder are hemispherical bottoms, and the volume of the mixing cylinder minus the volume of the spiral mixing paddle is not less than the internal volume of the micro-injection cylinder.

[0006] In other embodiments of the present invention, the thickness of the rubber piston in the micro-injection barrel is not less than 10% of the height of the inner cavity of the micro-injection barrel.

[0007] In other embodiments of the present invention, the mixing cylinder and the micro-injection cylinder are placed in parallel, and the mixing cylinder and the micro-injection cylinder are fixed as a whole by two fixing plates, and the fixing plates are provided with mounting holes.

[0008] In other embodiments of the present invention, the pushing device includes a mounting box, two pushing cylinders and a driving motor, the middle section of the pushing cylinder is provided with an inwardly concave arc-shaped annular groove, shafts are symmetrically provided at both ends of the pushing cylinder, bearings are sleeved on the shafts and the bearings are fixedly installed in the mounting box, the two pushing cylinders are arranged in parallel and side by side and the two inwardly concave arc-shaped annular grooves form a circular hole, the two pushing cylinders are sleeved with driven gear plates at the ends of the shafts on the same side, the driving motor shaft is inserted into the mounting box and is sleeved with a driving gear plate at the end, one side of the driving gear plate is meshed with a driven gear plate and the other side is meshed with the other driven gear plate through a guide gear plate, a through hole is provided between the top wall and the bottom wall of the mounting box and the through hole coincides with the circular hole.

[0009] In other embodiments of the present invention, the two pushing cylinders are rubber barrels, and when the decompression outer sleeve hose passes through the circular hole surrounded by the two concave arc-shaped annular grooves, the two pushing cylinders exert a squeezing force on the decompression outer sleeve hose.

[0010] In other embodiments of the present invention, the micro-stirring motor, micro-propulsion motor and drive motor are all electrically connected to a control system, and the control system is used to intelligently control the speed and start and stop of the micro-stirring motor, micro-propulsion motor and drive motor.

[0011] In other embodiments of the present invention, the pushing device is first installed on the L-shaped guide tube, the pushing hose is first put on the branch tube, and the bone cement is pushed from the microinjection cylinder into the pushing hose until it completely flows out from the other end. Then the pushing is stopped, and the decompression outer sleeve hose is immediately passed through the pushing device and then passed into the bone marrow from the L-shaped guide tube.

[0012] In other embodiments of the present invention, a heating plate is provided on the outer wall of the mixing cylinder and the micro-injection cylinder, and the heating plate is controlled by a control system to heat the mixing cylinder and the micro-injection cylinder so that the temperature inside the mixing cylinder and the micro-injection cylinder is 5-10°C higher than the human body.

[0013] In the present invention, bone cement raw materials are injected from two first injection pipes and a second injection pipe respectively. When the raw materials enter the mixing barrel, they are not stirred until the raw materials are discharged from the exhaust pipe. Then the injection of the raw materials is stopped, and then the mixing is carried out. The raw materials are rotated forward for 15 seconds and then turned over for 15 seconds. After the mixing is completed, the three-way valve is opened, and air is blown and pressurized from the exhaust pipe. The raw materials that are not completely mixed in part of the pipeline are discharged from the outer branch pipe. The three-way valve is tangentially connected to the micro-injection barrel, and then the raw materials are immediately discharged into the micro-injection barrel. After bone cement leaks out of the exhaust pipe, the injection is stopped, and the three-way valve is reversely selected to close the connection with the mixing barrel. The mixing effect is good and the speed is fast, and bone cement can be quickly prepared.

[0014] Before mixing, put the top of the push hose on the branch pipe. After the bone cement is completely discharged into the microinjection cylinder, open the manual valve on the branch pipe and inject bone cement into the push hose until bone cement is discharged from the push hose. Then stop the push. Before that, the push hose fixing and pushing device have been installed on the bone. At this time, the decompression outer sleeve hose is passed through the pushing device in time, and then inserted into the bone marrow from the L-shaped guide tube. After insertion, continue the push injection immediately. While pushing, the decompression outer sleeve hose is slowly pulled outward through the pushing device. Since the decompression hole on the decompression outer sleeve hose has a pressure relief effect (if the pressure relief is not good enough, a negative pressure device can be installed on the negative pressure hose, the push injection process will not be over-pressurized, and some plasma, bone marrow, etc. will leak out from the decompression hole for pressure reduction. It can also make the bone cement flow in the direction of pulling the decompression outer sleeve hose, which is convenient for controlling the flow direction of bone cement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a structural schematic diagram of a bone cement directional decompression and injection microcontroller used in percutaneous vertebroplasty proposed by the present invention.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the mixing cylinder and micro-injection cylinder positions proposed by the present invention.

[0017] Figure 3 This is a schematic structural diagram of the injection hose fixing and pushing device proposed in the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the pushing device proposed in the present invention.

[0019] In the figure: 1, mixing cylinder; 11, first injection pipe; 111, first manual flow valve; 12, second injection pipe; 13, exhaust pipe; 131, manual knob valve; 2, micro stirring motor; 21, rotating shaft; 211, spiral mixing paddle; 3, manual three-way valve; 31, connecting pipe; 4, micro injection cylinder; 40, rubber piston; 41, vent pipe; 42, branch pipe; 421, second manual flow valve; 5, push rod cylinder; 51, Micro push motor; 511, screw rod; 52, push rod; 6, push hose; 7, pressure relief outer sleeve hose; 71, pressure relief hole; 72, negative pressure hose; 8, push device; 81, installation box; 82, L-shaped guide tube; 83, bone plate; 831, bone screw hole; 9, drive motor; 91, guide gear plate; 92, driven gear plate; 93, push cylinder; 931, arc-shaped annular groove; 94, shaft; 941, bearing. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] like Figure 1-4 As shown, the present invention proposes a bone cement directional decompression push microcontroller for use in percutaneous vertebroplasty, comprising a mixing cylinder 1, a microinjection cylinder 4, a push hose assembly, and a push hose fixing and pushing device; The mixing barrel 1 is symmetrically provided with a first injection pipe 11 and a second injection pipe 12 communicated with the inside of the mixing barrel 1 on both side walls near the bottom end, and the first injection pipe 11 and the second injection pipe 12 are both provided with a first manual flow valve 111 at a segment position near the mixing barrel 1. The mixing barrel 1 is provided with an exhaust pipe 13 on the side wall near the top and a manual knob valve 131 is provided on the exhaust pipe 13. A micro stirring motor 2 is provided on the top of the mixing barrel 1, and the rotating shaft of the micro stirring motor 2 passes through the inside of the mixing barrel and extends to a position near the bottom. The micro stirring motor 2 is provided with a spiral mixing paddle 211 on the rotating shaft 21 inside the mixing barrel 1; It is composed of a mixture of one or more calcium phosphate powders and a liquid phase for blending. The powder is injected from the first injection tube 11 alone, and the liquid phase is injected from the second injection tube 12. The injection is carried out quickly to prevent solidification and hardening before injection into the human body (generally hardening takes more than 10 minutes). The injection of raw materials is controlled to be completed in 30 seconds, and then mixed. It is rotated forward for 15 seconds and then turned over for 15 seconds. After the mixing is completed, it takes about 45 seconds. The unmixed raw materials are discharged later, the three-way valve is opened, and air is blown and pressurized from the exhaust pipe. The raw materials that are not completely mixed in part of the pipeline are discharged from the external branch pipe. The three-way valve is tangentially connected to the micro-injection cylinder, and then it is immediately discharged into the micro-injection cylinder. This process from the injection of raw materials to the start of injection into the micro-injection cylinder 4 shall not exceed two minutes.

[0022] The micro-injection barrel 4 is provided with three independently controlled branch pipes 42 at the bottom end, the branch pipes 42 are communicated with the inside of the micro-injection barrel 4 and a second manual flow valve 421 is provided on the branch pipes 42, the micro-injection barrel 4 is provided with a vent pipe 41 communicated with the inside of the micro-injection barrel 4 on the side wall near the top position, the end of the vent pipe 41 connected to the micro-injection barrel 4 is a trumpet-shaped end, and the trumpet-shaped end is a trumpet mouth that gradually expands from top to bottom, a rubber piston 40 is plugged in the micro-injection barrel 4, when the rubber piston 40 is at the top of the micro-injection barrel 4, the rubber piston 40 will block half of the trumpet mouth of the trumpet-shaped end, a push rod barrel 5 is fixed on the top of the micro-injection barrel 4, a push rod 52 is provided in the push rod barrel 5, and the bottom end of the push rod 52 movably penetrates the top wall of the micro-injection barrel 4 and is fixedly connected to the rubber piston 40, a micro-propelling motor 51 is provided on the top of the push rod barrel 5, a screw rod 511 is connected to the rotating shaft of the micro-propelling motor 51, and the screw rod 511 is spirally inserted from the top of the push rod 52 into the inside thereof; It takes about 15 seconds to inject the mixed bone cement into the micro-injection tube 4. During the injection, the rubber piston 40 is at the top of the micro-injection tube 4. Since the rubber piston 40 only blocks half of the trumpet mouth of the trumpet-shaped end, air can still be released. Before the raw materials are injected into the mixing tube, the push-in hose 6 is first connected to the branch pipe 42.

[0023] The mixing cylinder 1 is connected to the bottom end of the micro-injection cylinder 4 by a connecting pipe 31, and an external branch pipe is provided on the connecting pipe 31. The connecting pipe 31 is provided with a manual three-way valve 3 at the position of the external branch pipe; the manual three-way valve 3 is used to discharge a little outward when the mixing in the pipeline is uneven when injected into the micro-injection cylinder, and then switch to communicate with the micro-injection cylinder.

[0024] The push-injection hose combination includes a push-injection hose 6 and a decompression outer jacket hose 7, wherein the decompression outer jacket hose 7 is sleeved on the rear half of the push-injection hose 6, a decompression gap is left between the inner wall of the decompression outer jacket hose 7 and the outer wall of the push-injection hose 6, and the push-injection hose 6 is exposed at the push-injection outlet end by 8-12 mm of the tail end of the decompression outer jacket hose 7, the decompression outer jacket hose 7 is provided with two circles of decompression holes 71 at the tail end segment, and the decompression holes 71 are communicated with the decompression gap, the decompression outer jacket hose 7 is provided with a negative pressure hose 72 on the top side wall, and the negative pressure hose 72 is communicated with the decompression gap, and the top end of the push-injection hose 6 is sleeved on the corresponding branch pipe 42 as needed; When bone cement is completely injected into the micro-injection tube (some bone cement leaks out from the air release tube 41), stop injecting, switch the manual three-way valve 3, open the second manual flow valve 421 on the branch pipe, start injecting bone cement into the push-injection hose 6, and stop draining bone cement after it flows out from the other end. Timely pass the decompression outer tube 7 through the pushing device 8, and then insert it into the bone marrow from the L-shaped guide tube 82. After insertion, continue to push and inject immediately. While pushing and injecting, slowly pull the decompression outer tube outwards through the pushing device. Since the decompression hole on the decompression outer tube has a pressure relief effect (if the pressure relief is not good enough, a negative pressure device can be installed on the negative pressure hose, and the push-in process will not be over-pressurized, and part of the plasma, bone marrow, etc. will leak out from the decompression hole for pressure reduction, and the bone cement can also flow along with the direction of pulling the decompression outer tube, which is convenient for controlling the flow direction of the bone cement.

[0025] The push hose fixing and pushing device includes a bone plate 83, an L-shaped guide tube 82 and a pushing device 8 for pushing the decompression outer sleeve hose 7 to move. The L-shaped guide tube 82 passes through the center position of the bone plate 83 at the bottom position and is fixed. The cross tube of the L-shaped guide tube 82 is parallel to the bone plate 83. The top end of the L-shaped guide tube 82 is connected to the output port of the pushing device 8. The decompression outer sleeve hose 7 is inserted from the input port of the pushing device 8 and penetrates into the L-shaped guide tube 82, and finally the L-shaped guide tube 82 is exposed. The bone plate 83 is attached to the bone and installed on the bone with bone screws.

[0026] If it is inconvenient to make multiple holes in the bone, only one hole for the L-shaped guide tube 82 to be inserted is opened, the bone plate 83 is attached to the bone, and the pushing device is tied with a rope to press the bone plate 83 to attach to the bone. Since the pushing device is not affected by the fixation degree of the bone plate 83, when the fit is firm, the bone cement can be injected. The raw materials are injected, mixed, and the bone cement is pushed into the push hose 6, and then the decompression outer hose 7 is inserted into the bone marrow. The process is controlled to be completed in 3-4 minutes as much as possible. After that, the column bone cement is pushed and the push is carried out slowly. Generally, it must be completed within 5 minutes. The injection of bone cement is completed in less than 10 parts. Since the bone cement solidifies in more than 10 minutes, the injection is basically guaranteed, and the bone cement does not solidify before the decompression outer hose 7 is pulled out. The push hose fixation and the pushing device are disassembled, and the skin at the injection position is sutured.

[0027] The bottoms of the mixing cylinder 1 and the micro-injection cylinder 4 are both conical, and the inner bottoms of the mixing cylinder 1 and the micro-injection cylinder 4 are hemispherical bottoms. The volume of the internal volume of the mixing cylinder 1 minus the volume of the spiral mixing paddle 211 is not less than the internal volume of the micro-injection cylinder 4. It is convenient for bone cement to gather at the bottom and push the column, ensuring that the mixed bone cement is sufficiently pushed into the micro-injection cylinder 4 and fills the micro-injection cylinder 4.

[0028] The thickness of the rubber piston 40 in the micro-injection tube 4 is not less than 10% of the inner cavity height of the micro-injection tube 4. The rubber piston 40 is equivalent to about 10% less bone cement injection to ensure the loss in the pipeline. In addition, it has a certain thickness, which is convenient for pushing the column and easy to control the pressure and push the injection.

[0029] The mixing cylinder 1 and the micro-injection cylinder 4 are placed in parallel, and two fixing plates are used to fix the mixing cylinder 1 and the micro-injection cylinder 4 as a whole, and the fixing plates are provided with mounting holes. Before mixing, the fixing plates are first installed and fixed to facilitate the stability of the mixing cylinder 1 and the micro-injection cylinder 4 during the subsequent operation.

[0030] The pushing device 8 includes a mounting box 81, two pushing cylinders 93 and a driving motor 9. The middle section of the pushing cylinder 93 is provided with a concave arc-shaped annular groove 931. Shafts 94 are symmetrically provided at both ends of the pushing cylinder 93. A bearing 941 is sleeved on the shaft 94 and the bearing 941 is fixedly installed in the mounting box 81. The two pushing cylinders 93 are arranged in parallel and side by side, and the two concave arc-shaped annular grooves 931 form a circular hole. The ends of the shafts 94 on the same side of the two pushing cylinders 93 are sleeved with a driven gear plate 92. The rotating shaft of the driving motor 9 is inserted into the mounting box 81 and is sleeved with a driving gear plate 90 at the end. One side of the driving gear plate 90 is meshed with a driven gear plate 92, and the other side is meshed with the other driven gear plate 92 through a guide gear plate 91. A through hole is provided between the top wall and the bottom wall of the mounting box 81, and the through hole coincides with the circular hole.

[0031] The two push cylinders 93 exert a squeezing force on the decompression outer sleeve hose 7, but will not cause it to deform. The driving motor 9 drives the two push cylinders 93 to rotate synchronously (such as Figure 4 As shown in the figure, before the decompression outer sleeve hose 7 is inserted into the bone marrow from the two pushing cylinders 93, it can be pushed in the reverse direction with assistance. When the push column cement is in the bone marrow, the two pushing cylinders 93 slowly push the decompression outer sleeve hose 7 outwards without manual pulling, with strong controllability and more uniform pulling.

[0032] The two pushing cylinders 93 are rubber barrels. When the decompression outer sleeve hose 7 passes through the circular hole surrounded by the two concave arc-shaped annular grooves 931 , the two pushing cylinders 93 exert a squeezing force on the decompression outer sleeve hose 7 .

[0033] The rubber barrel has a large extrusion friction, is easier to push, and is not easy to be squeezed and deformed.

[0034] The micro-stirring motor 2, micro-propelling motor 51 and driving motor 9 are all electrically connected to the control system, and the control system is used to intelligently control the speed and start and stop of the micro-stirring motor 2, micro-propelling motor 51 and driving motor 9. Connected to the control computer, the control conditions are set in advance, and the mixing, pushing bone cement into the pushing hose 6, and pushing bone cement into the bone marrow are all operated according to the set time and parameters. Intelligent control, small error, strong controllability.

[0035] The pushing device 8 is first installed on the L-shaped guide tube 82, and the push injection hose 6 is first put on the branch tube 42, and the bone cement is pushed from the microinjection cylinder 4 into the push injection hose 6 until it completely flows out from the other end, and then the push injection is stopped, and the decompression outer sleeve hose 7 is immediately passed through the pushing device 8 and then penetrated into the bone marrow from the L-shaped guide tube 82.

[0036] The purpose of first pushing the cement into the push tube 6 and then inserting the pushing device 8 is to discharge the air in the push tube 6 and to discharge part of the bone cement that is unevenly mixed in the pipeline and contains air.

[0037] The outer walls of the mixing cylinder 1 and the micro-injection cylinder 4 are provided with heating plates, which are controlled by the control system to heat the mixing cylinder 1 and the micro-injection cylinder 4, so that the temperature inside the mixing cylinder 1 and the micro-injection cylinder 4 is 5-10°C higher than that of the human body. During the injection process, the temperature will drop, and the temperature will be high before it is pushed into the bone, and the temperature inside the bone will be close to the human body temperature. The injection will be more comfortable, and the comfort will not be affected by the low temperature.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty, characterized in that: It includes a mixing cylinder (1, a micro-injection cylinder (4, a push-injection hose assembly and a push-injection hose fixing and pushing device; The mixing barrel (1) is symmetrically provided with a first injection pipe (11) and a second injection pipe (12) which are communicated with the inside of the mixing barrel (1) on both side walls near the bottom end. The first injection pipe (11) and the second injection pipe (12) are both provided with a first manual flow valve (111) at a segment position near the mixing barrel (1). The mixing barrel (1) is provided with an exhaust pipe (13) on the side wall near the top end, and a manual knob valve (131) is provided on the exhaust pipe (13). A micro stirring motor (2) is provided at the top of the mixing barrel (1). The rotating shaft of the micro stirring motor (2) passes through the mixing barrel from the top to the inside and extends to a position near the bottom. The micro stirring motor (2) is provided with a spiral mixing paddle (211) on the rotating shaft (21) inside the mixing barrel (1). The micro-injection barrel (4) is provided with three independently controlled branch pipes (42) at the bottom end, the branch pipes (42 are connected to the inside of the micro-injection barrel (4) and a second manual flow valve (421) is provided on the branch pipe (42, the micro-injection barrel (4) is provided with a vent pipe (41) connected to the inside of the micro-injection barrel (4) on the side wall near the top, the end of the vent pipe (41) connected to the micro-injection barrel (4) is a trumpet-shaped end, and the trumpet-shaped end gradually expands the trumpet mouth from top to bottom, and the micro-injection barrel (4) is plugged with a rubber piston (40, the rubber piston (4 0 is at the top of the micro-injection cylinder (4), the rubber piston (40 will block half of the trumpet mouth of the trumpet-shaped end, a push rod cylinder (5) is fixed on the top of the micro-injection cylinder (4), a push rod (52) is arranged in the push rod cylinder (5), and the bottom end of the push rod (52 movably penetrates the top wall of the micro-injection cylinder (4) and is fixedly connected to the rubber piston (40), a micro-propelling motor (51) is arranged on the top of the push rod cylinder (5), and a screw rod (511) is connected to the rotating shaft of the micro-propelling motor (51), and the screw rod (511 is spirally inserted from the top of the push rod (52) into the interior thereof; The mixing cylinder (1) and the micro-injection cylinder (4) are connected at the bottom by a connecting pipe (31), and an external branch pipe is provided on the connecting pipe (31), and a manual three-way valve (3) is provided at the position of the external branch pipe of the connecting pipe (31; The push-injection hose combination comprises a push-injection hose (6) and a decompression outer jacket hose (7, wherein the decompression outer jacket hose (7) is sleeved on the rear half of the push-injection hose (6), a decompression gap is left between the inner wall of the decompression outer jacket hose (7) and the outer wall of the push-injection hose (6), the push-injection hose (6 is exposed at the push-injection outlet end by 8-12 mm of the tail end of the decompression outer jacket hose (7), the decompression outer jacket hose (7 is provided with two circles of decompression holes (71) at the tail end segment, and the decompression holes (71) are communicated with the decompression gap, the decompression outer jacket hose (7) is provided with a negative pressure hose (72) on the top side wall, and the negative pressure hose (72 is communicated with the decompression gap, and the top end of the push-injection hose (6) is sleeved on the corresponding branch pipe (42 as required; The push-injection hose fixing and pushing device comprises a bone plate (83), an L-shaped guide tube (82) and a pushing device (8) for pushing the decompression outer tube (7 to move. The L-shaped guide tube (82) passes through the center of the bone plate (83) at the bottom end and is fixed. The transverse tube of the L-shaped guide tube (82) is parallel to the bone plate (83). The top end of the L-shaped guide tube (82) is connected to the output port of the pushing device (8). The decompression outer tube (7) is inserted from the input port of the pushing device (8) and penetrates into the L-shaped guide tube (82). Finally, the L-shaped guide tube (82) is exposed. The bone plate (83) is attached to the bone and installed on the bone with a bone nail.

2. A microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 1, characterized in that: The bottoms of the mixing cylinder (1) and the micro-injection cylinder (4) are both conical bottoms, the inner bottoms of the mixing cylinder (1) and the micro-injection cylinder (4) are hemispherical bottoms, and the volume of the mixing cylinder (1 minus the volume of the spiral mixing paddle (211) is not less than the inner volume of the micro-injection cylinder (4).

3. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 2, characterized in that: The thickness of the rubber piston (40) in the micro-injection cylinder (4) is not less than 10% of the inner cavity height of the micro-injection cylinder (4).

4. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 1, characterized in that: The mixing cylinder (1) and the micro-injection cylinder (4) are placed in parallel, and the mixing cylinder (1) and the micro-injection cylinder (4) are fixed as a whole by two fixing plates, and the fixing plates are provided with mounting holes.

5. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 1, characterized in that: The pushing device (8) comprises a mounting box (81), two pushing cylinders (93) and a driving motor (9), wherein the middle section of the pushing cylinder (93) is provided with an inwardly concave arcuate annular groove (931), and shafts (94) are symmetrically provided at both ends of the pushing cylinder (93), and a bearing (941 is sleeved on the shaft (94) and the bearing (941 is fixedly installed in the mounting box (81), and the two pushing cylinders (93) are arranged in parallel and in parallel, and the two inwardly concave arcuate annular grooves (931) surround a circular hole, and the ends of the shafts (94) of the two pushing cylinders (93) on the same side are sleeved with a driven gear plate (92), and the rotating shaft of the driving motor (9) is inserted into the mounting box (81) and sleeved with a driving gear plate (90) at the end, and one side of the driving gear plate (90 is meshed with a driven gear plate (92), and the other side is meshed with another driven gear plate (92 through a guide gear plate (91), and a through hole is provided between the top wall and the bottom wall of the mounting box (81), and the through hole coincides with the circular hole.

6. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 5, characterized in that: The two push cylinders (93) are rubber barrels. When the decompression outer jacket hose (7) passes through the circular hole surrounded by the two concave arc-shaped annular grooves (931), the two push cylinders (93) exert a squeezing force on the decompression outer jacket hose (7).

7. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 5, characterized in that: The micro stirring motor (2), the micro pushing motor (51) and the driving motor (9) are all electrically connected to a control system, and the control system is used to intelligently control the speed and start and stop of the micro stirring motor (2), the micro pushing motor (51) and the driving motor (9).

8. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 1, characterized in that: The pushing device (8) is first installed on the L-shaped guide tube (82), and the push-injection hose (6) is first put on the branch tube (42), and the bone cement is pushed from the micro-injection tube (4) into the push-injection hose (6) until it completely flows out from the other end, and then the push-injection is stopped, and the decompression outer hose (7) is immediately passed through the pushing device (8), and then penetrated into the bone marrow from the L-shaped guide tube (82).

9. The microcontroller for directional decompression and injection of bone cement used in percutaneous vertebroplasty according to claim 1, characterized in that: The outer walls of the mixing cylinder (1) and the micro-injection cylinder (4) are provided with heating plates, and the heating plates are controlled by the control system to heat the mixing cylinder (1) and the micro-injection cylinder (4), so that the temperature inside the mixing cylinder (1) and the micro-injection cylinder (4) is 5-10° C. higher than that of the human body.

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