CN113040892A

CN113040892A - Bone cement filling device

Info

Publication number: CN113040892A
Application number: CN202110239202.1A
Authority: CN
Inventors: 熊启明; 张伟伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-06-29

Abstract

The invention discloses a bone cement filling device, which comprises an injection part, wherein the injection part comprises an injection pipe and a telescopic pipe; the injection tube is a hard straight tube; the telescopic pipe is a soft pipe which is axially folded and compressed; the telescopic airbags with the same length are fixed in the tube wall of the telescopic tube, and the length of the telescopic airbags in the contraction state and the length of the telescopic airbags in the extension state are the same as the length of the telescopic tube in the contraction state and the length of the telescopic tube in the extension state; the expansion air bag is inflated and deflated to drive the expansion pipe to expand and contract; the communicating air pipe is arranged in the injection pipe, communicated with the telescopic air bag and used for inflating and deflating the telescopic air bag; the communicating air pipes and the telescopic air bags are in one-to-one correspondence to form a group, the injection part comprises 4-8 groups, and the communicating air pipes and the telescopic air bags are uniformly arranged at intervals along the circumferential direction of the telescopic pipe; the air inlet and outlet pipe is used for inflating and deflating the compressed air bag. The device can be convenient for the operator to adjust the injection direction of bone cement.

Description

Bone cement filling device

Technical Field

The invention relates to a bone cement filling device, in particular to an adjustable and multi-angle bone cement filling device.

Background

The existing bone cement stirring and injecting device, such as chinese patent (CN110801276B), uses forced stirring in a pulling manner when stirring bone cement, and the existing common devices basically stir in this manner, which has several problems:

1. the bone cement is in a state of small viscosity in a thin period, in a closed space, because the bone cement only fills part (1/10-1/4 space) to be repeatedly pulled, the bone cement and air are forcibly mixed and repeatedly sprayed out from a piston sheet-like structure with holes, so that a uniform mixing effect is achieved, a closed inner hole is easily formed in liquid, when the viscosity of the bone cement is rapidly increased, the inner hole is remained in the bone cement and remained in an injection space through injection, and the problem is that the position, the shape and the size of the inner hole are uncontrollable, so that the structural strength of the hardened bone cement has a large uncontrollable factor, if a plurality of inner holes are arranged, and are connected in series in the stress direction of bones, the stress is concentrated on adjacent points of the closed inner hole, and a large cracking risk exists;

2. the pulling type forced stirring has a considerable amount of cement left on the piston plate (for example, in the chinese patent CN110801276B, a part of cement remains on the side of the piston plate away from the injection end), because the stirring amount is not large each time, if the residual amount on the non-injection side of the piston plate is large, the amount capable of being injected is small, although the bone cement is injected by the transmission device to assist in observing the injection amount, the difference between the stirring amount and the injection amount is large, so that the operator has a great confusion, the operation progress is slowed down, but the coagulation time of the bone cement is very short, so that a great risk is caused to the operation, and it is very critical to keep the stirring amount and the injection amount consistent to reduce the operation difficulty;

3. the stirred bone cement is directly injected into the bone cavity under pressure, and the problem that a closed inner hole exists in the bone cement can also exist;

4. the problem of single injection direction, the existing pipelines have two kinds, one is a straight pipe, and only one injection direction exists; the other is that a plurality of injection holes are arranged on the side wall of the pipeline, and the opening and closing of the injection holes are controlled by controlling a double-layer pipeline so that the bone cement can be ejected from a plurality of directions; the single injection direction is easy to cause injection dissatisfaction in local areas, only injection pressure can be increased, leakage and other risks are easy to occur due to pressurization, and the leakage risk is increased due to the fact that the size of an injection hole is reduced and too high bone cement pressure is easy to occur due to multi-hole injection;

5. the pressure in the bone cavity is too big, especially the air is retained in the injection syringe, and when bone cement pressurization injection, the pressure in the cavity is undetectable, also difficult problem that steps down, and too big pressure leads to bone cement seepage to improve the risk easily.

Disclosure of Invention

The invention aims to provide a bone cement filling device which can realize the adjustment of the filling direction in the bone cement injection process.

The embodiment of the application provides a bone cement filling device, which comprises an injection part, a first injection part and a second injection part, wherein the injection part comprises an injection pipe and a telescopic pipe;

the injection tube is a hard straight tube;

the telescopic pipe is a soft pipe which is axially folded and compressed; the axial length of the telescopic pipe is 3-8mm in a compressed state; the inner diameter of the telescopic pipe is the same as and communicated with the inner diameter of the injection pipe; the inner diameter of the bottom of the injection tube is expanded to accommodate the telescopic tube; 1/3-1/2 of the telescopic tube is positioned in the injection tube under the compressed state; the axial length of the extension tube in the extension state is 2-3 times of the axial length of the extension tube in the compression state;

the telescopic airbags with the same length are fixed in the tube wall of the telescopic tube, and the length of the telescopic airbags in the contraction state and the length of the telescopic airbags in the extension state are the same as the length of the telescopic tube in the contraction state and the length of the telescopic tube in the extension state; the expansion air bag is inflated and deflated to drive the expansion pipe to expand and contract;

the communicating air pipe is arranged in the injection pipe, communicated with the telescopic air bag and used for inflating and deflating the telescopic air bag;

the communicating air pipes and the telescopic air bags are in one-to-one correspondence to form a group, the injection part comprises 4-8 groups, and the communicating air pipes and the telescopic air bags are uniformly arranged at intervals along the circumferential direction of the telescopic pipe;

the air inlet and outlet pipe is used for inflating and deflating the compressed air bag.

Further, the air inlet and outlet pipe comprises a threaded column, a threaded lifting cylinder and a compression air bag; the threaded column is in threaded connection with the threaded lifting tube, the threaded lifting tube is provided with an axial gap for manually rotating the threaded column, and the bottom end of the threaded column is fixedly connected with the compressed air bag; the air content of the compressed air bag is greater than the maximum volume of the telescopic air bag; the compression air bag is positioned at the bottom of the threaded lifting through pipe and is communicated with the communicating air pipe; the air bag can be compressed and relaxed by rotating the threaded column, so that the purposes of inflating and deflating the telescopic air bag are achieved; the number of the air inlet and outlet pipes is the same as that of the communicated air pipes and corresponds to that of the communicated air pipes one by one; the air inlet and outlet pipe is positioned at the upper part of the injection pipe.

Further, the telescopic pipe comprises a contraction opening which is fixedly communicated with the bottom end of the telescopic pipe; the contraction port comprises a hollow ring section, a solid section, a second pull wire, a manufacturing rod and a pull wire adjusting part;

the contraction port comprises a bottom ring, the bottom ring comprises a hollow ring section, and the hollow ring section is a hollow section; the outer diameter of the solid section is smaller than the inner diameter of the hollow ring section, the end head of the solid section extends into the hollow ring section, one end positioned in the hollow ring section is fixedly connected with a second pull wire, and the second pull wire penetrates into an inner ring hole of the solid section from the closed end of the hollow ring section and penetrates out of the solid section from one end connected with the interface of the hollow ring section and the solid section and passing through the axis of the bottom ring; the second pull wire enters the injection tube from the outer side of the extension tube and penetrates out of the upper part of the injection tube through an axial inner hole of the injection tube;

the pull wire adjusting part is used for pulling and placing a second pull wire and controlling the diameter of the bottom opening; the pull wire adjusting part comprises a thread cylinder and a stud, the stud and the rest thread cylinder are in threaded connection, the thread cylinder is fixed on the injection tube, an axial gap is formed in the thread cylinder and used for shifting and rotating the stud, and the bottom end of the stud is fixedly connected with a second pull wire; the diameter of the bottom opening can be adjusted by rotating the stud;

the bottom openings are fixedly connected with the telescopic pipes through support rods 734, and 3-6 support rods are uniformly arranged at intervals along the circumferential direction of the bottom openings and the telescopic pipes; the bottom opening is communicated with the telescopic pipe through a hose.

Further, the hollow ring segments occupy 1/3-1/4 of the length of the bottom ring.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. the telescopic air bags at different positions are controlled to inflate by matching the telescopic tube and the telescopic air bags, so that the telescopic tube can be driven to turn, disposable articles can be manufactured conveniently, the popularization and the use are facilitated, the turning operation is simple, and the operation difficulty is reduced;

2. the contraction opening is simple in structure and operation, the diameter of the bone cement filling is convenient for an operator to quickly adjust, narrow space is convenient to fill, and meanwhile, the pressure of a bone cavity cannot be increased.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a structure with gas injection;

FIG. 3 is a view showing a deflated state of the balloon with the bottom cone protruding downward;

FIG. 4 is a schematic view of a bladder configuration;

fig. 5 is a schematic view of a bottom cone.

FIG. 6 is a schematic view of a structure with a receptacle and a pressurizing assembly;

FIG. 7 is a schematic diagram of a receptacle configuration;

FIG. 8 is a schematic view of a receiving and pressurizing assembly in use;

FIG. 9 is a schematic view of a rail configuration;

FIG. 10 is a schematic view of the injection part;

FIG. 11 is a schematic view of the structure of the intake and exhaust pipes;

FIG. 12 is a schematic view of the structure of the syringe and the extension tube;

FIG. 13 is a schematic view of a bottom ring structure;

FIG. 14 is a cross-sectional view of FIG. 13;

FIG. 15 is a schematic structural view of the contracted state of the bottom ring;

FIG. 16 is a schematic view of the structure of the pull wire adjusting part and the injecting part;

FIG. 17 is an enlarged partial view of FIG. 16;

FIG. 18 is a schematic view of the structure after turning and pipe diameter change;

FIG. 19 is a schematic view of a syringe configuration with a pressure sensing assembly;

FIG. 20 is a schematic view of the pressure detecting section;

FIG. 21 is a schematic view showing the structure of the state where the bottom opening and the bellows are communicated.

In the figure, the support portion 100, the bracket 110, the top frame 111, the rotational positioning device 120, and the housing hole 130; a fixing part 200, a positioning cylinder 210, a connecting shaft 220, a winding ring 221 and a coil spring 222;

the holding bag 300, the air bag 310, the air pipe 320, the bottom cone 330, the sealing strip 331, the stirring strip 332 and the connecting pipe 340;

an operating part 400, a top plate 410, a communicating pipe 420, a powder containing pipe 430, a powder adjusting cap 431, a powder puncturing needle 432, a liquid containing pipe 440, a liquid adjusting cap 441, a liquid puncturing needle 442, a protective cover 450, and an inflator 460;

the accommodating part 500, a vacuum bag 510, a bearing layer 511, an exhaust assembly 520, an exhaust hopper 521, a waterproof breathable film 522, an air pumping cylinder 523 and a discharging pipe 530;

a pressurizing assembly 600, a rotating guide 610, a rotating rod 620, and a pressurizing rod 630;

an injection part 700, an injection tube 710, an extension tube 720, a communicating air tube 721, an extension air bag 722, an air inlet and outlet tube 723, a contraction opening 730, a hollow ring section 731, a solid section 732, a stay 733, a making rod 734, a stay adjusting part 735, a threaded cylinder 7351 and a stud 7352;

pressure detection assembly 800, soft ring 810, pressure conduction pipe 820, elastic orifice membrane 821, pressure detection assembly 830, sealing cavity 831, detection socket 832 and pressure balance pipe 840

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The bone cement is quickly rotated in the roller by the rotation of the roller, the bone cement is quickly and uniformly mixed by the rotation, the process that air is forcibly mixed into the bone cement is avoided,

a bone cement mixing device comprises a supporting part 100 and a fixing part 200; a containment bag 300; an operation section 400;

the support portion 100 serves as a positioning base;

the support part 100 comprises a bracket 110, a rotary positioning device 120 and a containing hole 130;

the bracket 110 is used for fixing a positioning base of the part 200; the bracket 110 forms an accommodating space, and can be fixed with the accommodating part fixing part 200, and the rotary positioning device 120 is fixed in the middle of the accommodating space of the bracket 110;

the rotary positioning device 120 is ring-shaped and is used for supporting the fixing part 200 to rotate along the axis of the rotary positioning device; the rotational positioning device 120 may be a bearing, a sliding fit, a contact ring, etc.;

the containing hole 130 is positioned at the bottom end of the bracket 110, and the containing hole 130 is coaxial with the rotary positioning device;

the fixing part 200 comprises a positioning cylinder 210, a connecting shaft 220, a winding ring 221 and a coil spring 222;

the fixed cylinder 210 is a cylindrical cylinder with an opening on the bottom surface; the middle part of the outer wall of the fixed cylinder 210 abuts against the inner annular surface of the rotary positioning device 120 and is coaxial with the rotary positioning device 120;

the connecting shaft 220 is coaxial with the fixed cylinder 210, and the connecting shaft 220 is fixed at the top end of the fixed cylinder 210; the connecting shaft 220 passes through a through hole at the top end of the bracket 110 and extends out of the accommodating space defined by the bracket;

the connecting shaft 220 is hollow, a coil spring 222 is fixed in a cylindrical cavity in the connecting shaft 220, one end of the coil spring 222 is fixedly connected with the bottom end of the connecting shaft 220, and the other end of the coil spring extends out of the connecting shaft 220 and is fixedly connected with the fixed frame 111; the top frame 111 is fixedly connected with the bracket 110;

a winding ring 221 is fixed in the middle of the outer wall of the connecting shaft 220, and one end of a pull rope is fixed on the ring surface of the winding ring 221;

the accommodating bag 300 is used for accommodating powder and liquid of bone cement and is used as a bone cement mixing space;

the containing bag 300 is a soft bag, and can be made of plastic, rubber, silica gel and the like; the accommodating belt 300 is naturally cylindrical with two open ends; the outer wall of the containing bag 300 is attached to the inner wall of the fixed cylinder 210, and the outer side of the bottom end of the containing bag is fixedly connected with the bottom of the fixed cylinder 210; the containing bag 300 is coaxial with the fixed cylinder 210;

an air bag 310 is fixed on the inner wall of the containing bag 300, the air bag 310 is conical under the state of being full of air, and the axis of the conical shape is horizontally arranged; the air bags 310 are arranged in a group at the same axial position on the inner wall of the containing bag 300, 4-8 air bags are arranged in each group, and a plurality of groups are axially arranged at intervals in the containing bag 300; the axial length of the inflated air bag is 1/8-1/6 of the inner diameter of the containing bag 300, the outer diameter of the bottom surface of the air bag is 1/10-1/8 of the inner diameter of the containing bag 300, the outer diameter of the bottom surface of the air bag is smaller than the axial length, and the cone angle of the air bag is 40-60 degrees;

the air pipe 320 is fixed in the bag body layer of the containing bag 300 or on the outer surface of the containing bag 300, and the air pipe 320 is communicated with the air bag 310 and is used for an air charging and discharging channel of the air bag 310;

an opening at one end of the bottom cone 330 is fixedly connected with the bottom opening of the accommodating bag 300 in a sealing manner; the bottom cone 330 is made of rubber or silica gel and has elasticity, and can be turned over to enter the containing bag 300 and also can be turned over to protrude out of the containing bag 300; the bottom cone 330 is coaxial with the receiving bag 300; the taper angle of the bottom cone 330 is within the range of 100 degrees and 150 degrees; the top of the bottom cone 330 is provided with an opening sealed by a sealing strip 331;

the connecting pipe 340 is communicated with the cone top opening of the bottom cone 330;

the operation part 400 is used for injecting materials into the containing bag and pushing the uniformly mixed bone cement out of the containing bag 300;

the operation unit 400 includes a top plate 410 and a communication pipe 420;

the top plate 410 is a circular plate and is fixedly connected with an opening at one end of the accommodating bag 300 close to the connecting shaft 220 in a sealing manner, and the difference between the outer diameter of the top plate 410 and the inner diameter of the fixed cylinder 210 is 2-2.5 times of the wall thickness of the accommodating bag 300; and the top plate 410 initial position drives the top end of the containing bag 300 to turn inwards for 2-6 mm;

the communication pipe 420 is fixed on the upper side of the top plate 410, and the connection part of the top plate 410 and the communication pipe 420 is opened, so that the communication pipe 420 is communicated with the inner cavity of the accommodating bag 300; the communicating pipe 420 is a passage for feeding materials into the receiving bag 300; the communication pipe 420 passes through the top end of the fixed cylinder and the connection shaft 220 and the outside of the upper frame 111.

The axis of the cone is preferably perpendicular to the axis of the receiving bag 300, so that the plurality of cones are more evenly distributed;

the outer side surface of the bottom cone when extending into the containing bag 300 is provided with a stirring strip, the material of the stirring strip is the same as that of the bottom cone, the stirring strip extends from the cone bottom of the bottom cone to the opening of the cone top, the stirring strip is intersected with a generatrix of the bottom cone, and the included angle is 10-40 degrees;

the use is convenient; a powder containing pipe 430 and a liquid containing pipe 440 are fixed in the communicating pipe 420, and a protective cover 450 and an inflator 460 are fixed at the top end of the communicating pipe 420;

the powder accommodating tube 430 is filled with bone cement powder materials; the top end of the powder containing pipe 430 is connected with a powder adjusting cap 431 in a threaded manner; the bottom end of the powder accommodating tube 430 is sealed by a plastic film, the bottom end of the powder adjusting cap 431 is fixedly connected with a powder puncturing needle 432, the powder puncturing needle extends into the powder accommodating tube 430, and when the powder adjusting cap 431 rotates along the top end thread of the powder accommodating tube 430 and moves downwards, the powder puncturing needle can puncture the plastic film, so that powder falls into the accommodating bag 300;

the top end of the liquid containing tube 440 is provided with a liquid adjusting cap 441 in threaded connection, the bottom end of the liquid containing tube 440 is also sealed by a plastic film, the bottom end of the liquid adjusting cap 441 is fixed with a liquid puncturing needle 442, the liquid puncturing needle is located in the liquid containing tube 440, and when the liquid adjusting cap 441 rotates and moves downwards along the top end thread of the liquid containing tube 440, the liquid puncturing needle 442 can puncture the plastic film at the bottom end of the liquid containing tube 440, so that the liquid flows into the containing bag 300;

the protective cover 450 is used for closing the top end of the communicating pipe 420 and protecting the tops of the powder accommodating pipe 430 and the liquid accommodating pipe 440;

the inflator 460 is detachably and fixedly connected with the top end of the communicating pipe 420, and the air pipe 320 passes through the communicating pipe 420 to be communicated with the inflation and deflation ports of the inflator 460.

The bottom end of the powder pricker 441 is in a shuttle shape, and the maximum outer diameter of the shuttle shape is equal to the inner diameter of the powder containing pipe 430; the dust needle 441 moves downwards for a limit distance which is greater than the axial length of the spindle shape; the shuttle shape is convenient for puncturing the plastic, guiding the powder material to fall down and uniformly dispersing and blanking;

the outer wall of the containing bag 300 can be adhered to the inner wall of the fixed cylinder through pressure-sensitive adhesive or adhesive which is easy to be glassed under the action of external force;

the layer of the air bag 310 is internally fixed with one or more metal wires as shown in figure 4, and the metal wires extend from the cone body of the air bag 310 to the cone top and are parallel to the generatrix;

the stirring process of the bone cement is as follows:

step one, powder and liquid are poured into the containing bag 300 through a communicating pipe 420;

step two, pushing the bottom cone 330 into the containing bag 300;

step three, inflating the air bag 310 through the air pipe 320 to enable the air bag to be full of air and form a cone shape;

and step four, pulling the pull rope to enable the fixing cylinder to drive the containing bag 300 to rotate, repeatedly pulling the pull rope for 5-10 times, standing for 5-20 seconds, and enabling the bubbles to quickly float upwards along the bottom cone and the air bag to complete the stirring work of the bone cement.

When powder and liquid containing pipes are arranged in the communication pipe 420, the first step further comprises the steps of opening the protective cover, firstly screwing the liquid adjusting cap 441 to enable the liquid puncture needle to puncture the sealing film at the bottom end of the liquid containing pipe to enable the liquid to flow into the containing bag 300, and then screwing the powder adjusting cap 431 to enable the powder to fall into the containing bag; of course, this step may be combined with the fourth step of simultaneously puncturing the sealing films on the bottom surfaces of the powder-containing tube 430 and the liquid-containing tube 440, and pulling the pulling wire to rotate the containing bag 300 during the falling of the powder and the liquid.

When bone cement needs to be injected, the bottom cone 330 is pulled out, the top end of the communicating pipe 420 is directly sealed, and then the bottom cone is pushed into the containing bag 300, so that the containing bag 300 is turned inwards, the sealing strip at the opening of the bottom cone is broken through pressure, and the bone cement flows out.

In order to facilitate filling of the bone cement and further discharge of the closed air bubbles inside, an air discharge device for the bone cement is added, and comprises a containing part 500 and a pressurizing assembly 600;

the accommodating part 500 is used for accommodating the stirred bone cement and exhausting the bone cement; the accommodating part 500 comprises a vacuum bag 510, an exhaust assembly 520, an exhaust hopper 521, a waterproof breathable film 522, an air pumping cylinder 523 and a discharging pipe 530;

the vacuum bag 510 is a soft bag, the interior of the bag is vacuumized, and one end of the bag is communicated with the connecting pipe 340; the outer layer of the soft bag 510 is made of plastic or rubber, and the inner layer is coated with a metal wire mesh to form a bearing layer 511 for fixing the size of the vacuum bag; the open end of the vacuum bag 510 can be flushed out under the action of pressure through hot-pressing sealing, or the vacuum bag can be sealed through clamping of a clamp, and the pipeline can be opened by opening the clamp;

the exhaust assembly 520 comprises an exhaust hopper 521, a waterproof breathable film 522 and an air pumping cylinder 523;

the exhaust head 521 is communicated with the vacuum bag 510, the communication position is located in the center of one side of the vacuum bag 510, and the waterproof air-permeable membrane 522 seals the communication port of the exhaust hopper 521 and the vacuum bag 510; the air pumping cylinder 523 is communicated with one end of the exhaust funnel 521, which is far away from the waterproof breathable film 522, and the air pumping cylinder 523 is used for forming negative pressure in the exhaust funnel 521;

the connection part of the discharging pipe 530 and the vacuum bag 510 is located at the end opposite to the connection part of the vacuum bag 510 and the connecting pipe 340;

the pressing assembly 600 is used for pressing the vacuum bag 510, and the pressing assembly 600 includes a rotating guide 610, a rotating rod 620, a pressing rod 630 and an interference plate 640;

the rotating guide 610 may be fixedly connected with the bracket 110; of course the angle may be 90 degrees or other angles; two groups of transmission guide rails are provided, each group comprises two guide rail bars arranged in parallel at intervals, the upper guide rail bar is a hard and smooth guide rail bar, the lower guide rail bar is provided with meshing teeth which are uniformly and continuously arranged, the rotating rod 620 is provided with a fluted disc meshed with the meshing teeth, meanwhile, the cylindrical part of the transmission rod 620 always props against the upper guide rail bar, the two groups of guide rail bars are parallel, and the rotating rod 620 is vertical to the guide rail bars;

the touch panel is fixedly connected with the upper guide rail bar or the lower guide rail bar of the guide rail bar, so that the touch panel 640 touches the panel 640 and is positioned between the two groups of rotating guide rails 610; one side surface of the abutting plate 640 abuts against one side of the vacuum bag 510 with the exhaust assembly 520, and the abutting plate 640 is provided with a through hole, so that the exhaust hopper 521 extends out of the through hole;

the transmission rod 620 is fixedly connected with a coaxial pressurizing rod 630, the width of the pressurizing rod 630 is larger than that of the vacuum bag 510, and the gap between the pressurizing rod 630 and the abutting plate 640 is equal to or slightly smaller than the sum of the wall thicknesses of two layers of the vacuum bag;

the vacuum exhaust step of the bone cement is as follows:

step one, introducing the uniformly mixed bone cement into a vacuum bag, beating the vacuum bag 510 at the same time, enabling the vacuum bag to be in a horizontal state, enabling an exhaust hopper to be located at the upper side, and beating to enable air bubbles to be gathered at the exhaust hopper;

and step two, the air exhaust hopper is kept in a negative pressure state through the air exhaust cylinder 523, so that quick air exhaust is realized.

When the bone cement is injected directly from the vacuum bag, the driving rod 620 is rotated to drive the pressurizing rod 630 to move and squeeze the vacuum bag 500.

In addition, in order to solve the problem of single injection direction, the multi-direction injection tube is also included, and comprises an injection part 700, wherein the injection part comprises an injection tube 710 and a telescopic tube 720;

the injection tube 710 is a hard straight tube;

the extension tube 720 is a flexible tube (for reference, exhaust tube, drain tube, etc.) which is axially folded and compressed; the axial length of the extension tube 720 in the compressed state is 3-8 mm; the inner diameter of the extension tube 720 is the same as and communicates with the inner diameter of the injection tube 710; the bottom inner diameter of the injection tube 710 is enlarged for receiving the extension tube 720; the telescopic tube 720 is 1/3-1/2 positioned in the injection tube 720 in a compressed state; the axial length of the extension tube 720 in the extension state is 2-3 times of the axial length in the compression state;

the telescopic air bags 722 with the same length are fixed in the tube wall of the telescopic tube 720, and the length of the telescopic air bags 722 in the contraction state and the length of the telescopic air bags 722 in the extension state are the same as the length of the telescopic tube 720 in the contraction state and the extension state; the expansion air bag 722 can drive the expansion and contraction of the expansion pipe 720 by inflating and deflating;

the communicating air tube 721 is arranged in the injection tube 710, the communicating air tube 721 is communicated with the telescopic air bag 722 and is used for inflating and deflating the telescopic air bag 722;

the communicating air pipes 721 and the telescopic air bags 722 are in one-to-one correspondence to form a group, the injection part comprises 4-8 groups, and the groups are uniformly arranged at intervals along the circumferential direction of the telescopic pipe 720;

the air inlet and outlet pipe 723 is used for inflation and deflation operations of the compression air bag 722, and the air inlet and outlet pipe 723 comprises a threaded column 7231, a threaded lifting cylinder 7232 and a compression air bag 7233; the threaded column 7231 is in threaded connection with a threaded lifting through 7232, the threaded lifting through 7232 is provided with an axial notch for manually rotating the threaded column 7231, and the bottom end of the threaded column 7231 is fixedly connected with a compression air bag 7233; the air content of the compression air bag 7233 is greater than the maximum volume of the telescopic air bag 722; the compression air bag 7233 is positioned at the bottom of the threaded lifting through 7232 and is communicated with the communicating air pipe 721; the compressed air bag can be compressed and relaxed by rotating the threaded column 7231, so that the purpose of inflating and deflating the telescopic air bag 722 is achieved; the number of the air inlet and outlet pipes 723 is the same as that of the communication air pipes 721 and corresponds to that of the communication air pipes one by one; the gas inlet and outlet pipe 723 is positioned on the upper part of the injection pipe;

the different air inlet and outlet pipes 723 are controlled to drive the telescopic air bags 722 at different positions to contract and relax, so that the pipe orifices of the telescopic pipes 720 can be controlled to turn in different directions;

after the solution is turned to, the diameter of the bone cement injected to different positions can be finely injected to partial gaps if the diameter can be adjusted;

a contraction port 730 is added and fixedly communicated with the bottom end of the extension tube 720; the contraction opening comprises a hollow ring section 731, a solid section 732, a second pull wire 733, a manufactured rod 734 and a pull wire adjusting part 735;

the constriction comprises a bottom ring, the bottom ring comprises a hollow ring section 731, and the hollow ring section 731 is a hollow section; the outer diameter of the solid section 732 is smaller than the inner diameter of the hollow ring section 731, the end of the solid section 732 extends into the hollow ring section 731, one end in the hollow ring section 731 is fixedly connected with a second pull wire 733, the second pull wire 733 penetrates into an inner ring hole of the solid section 732 from the closed end of the hollow ring section and penetrates out of the solid section 732 from one end, connected with the interface of the hollow ring section and the solid section, of the bottom ring axis; the second pulling wire 733 enters the injection tube 710 from the outer side of the extension tube 720, passes through the axial inner hole of the injection tube 710 and penetrates out of the upper part of the injection tube 710;

the pull wire adjusting part 735 is used for pulling and releasing a second pull wire and controlling the diameter of the bottom opening; the pull wire adjusting part 735 comprises a threaded cylinder 7351 and a threaded rod 7352, the threaded rod 7352 and the threaded cylinder 7351 are in threaded connection, the threaded cylinder 7351 is fixed on the injection tube 710, the threaded cylinder 7351 is provided with an axial gap for driving the rotating threaded rod 7352, and the bottom end of the threaded rod 7352 is fixedly connected with the second pull wire 733; the diameter of the bottom opening can be adjusted by rotating the stud 7352;

the bottom openings are fixedly connected with the telescopic pipes 720 through support rods 734, and 3-6 support rods 734 are uniformly arranged at intervals along the circumferential direction of the bottom openings and the telescopic pipes 720; the bottom opening is communicated with the extension tube 720 through a hose;

the empty ring segments 731 occupy 1/3-1/4 of the length of the bottom ring;

in actual operation, because the pressure injection of bone cement and the injection of air in the pipeline can cause the pressure in the bone cavity to increase, which causes danger, but if the pressure is detected, how to balance the pressure has no solution temporarily, therefore, a pressure detection assembly 800 is added for balancing the pressure in the bone cavity;

the pressure detection assembly comprises a soft body ring 810, a pressure conduction pipe 820, an elastic orifice membrane 821, a pressure detection part 830, a sealing cavity 831, a detection socket 832 and a pressure balance pipe 840;

the soft ring 810 is a ring which is made of a plastic film and is filled with gas or liquid; the injection tube is positioned at the bottom of the injection tube 710, and a plurality of soft rings 810 are arranged at intervals along the axial direction of the injection tube 710; the soft ring 810 is fixed in a concave annular groove at the bottom of the injection tube 710; a hard supporting net with a through hole is fixed outside the annular groove; the aperture of the hard support net is 0.5-1mm, and the hard support net is used for enabling gas and liquid to enter the annular groove to press the soft ring 810;

the residual pressure conduction channels 820 of the soft rings 810 correspond to each other one by one, and the pressure conduction pipes 820 penetrate through the axial inner holes of the injection pipes 710 and penetrate out of the tops of the injection pipes 710;

the pressure detection part 830 is fixed on the top of the injection tube 710, the pressure detection part 830 comprises a sealing cavity 831 and a detection socket 832, and the pressure transmission tube 820 extends into the pressure transmission part; the pressure transmission pipe 820 is communicated with the sealing cavity 831 and is communicated with an elastic pipe orifice film 821 made of sealing rubber; the sealed cavity 831 is provided with a detection socket 832, and the detection socket 832 is communicated with a barometer;

in addition, a pressure balancing tube 840 passes from the axial bore of the syringe 710 into the bottom of the syringe nozzle or into an annular groove, reducing the pressure in the bone cavity by venting or draining.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The bone cement filling device comprises an injection part, and is characterized in that the injection part comprises an injection pipe and a telescopic pipe;

the injection tube is a hard straight tube;

the telescopic pipe is a soft pipe which is axially folded and compressed; the axial length of the extension tube 720 in the compressed state is 3-8 mm; the inner diameter of the telescopic pipe is the same as and communicated with the inner diameter of the injection pipe; the inner diameter of the bottom of the injection tube is expanded to accommodate the telescopic tube; 1/3-1/2 of the telescopic tube is positioned in the injection tube under the compressed state; the axial length of the extension tube in the extension state is 2-3 times of the axial length of the extension tube in the compression state;

2. The bone cement filling device according to claim 1, wherein the air inlet and outlet pipe comprises a threaded column, a threaded lifting cylinder and a compression air bag; the threaded column is in threaded connection with the threaded lifting tube, the threaded lifting tube is provided with an axial gap for manually rotating the threaded column, and the bottom end of the threaded column is fixedly connected with the compressed air bag; the air content of the compressed air bag is greater than the maximum volume of the telescopic air bag; the compression air bag is positioned at the bottom of the threaded lifting through pipe and is communicated with the communicating air pipe; the air bag can be compressed and relaxed by rotating the threaded column, so that the purposes of inflating and deflating the telescopic air bag are achieved; the number of the air inlet and outlet pipes is the same as that of the communicated air pipes and corresponds to that of the communicated air pipes one by one; the air inlet and outlet pipe is positioned at the upper part of the injection pipe.

3. The bone cement filling apparatus according to claim 1,

the telescopic pipe is characterized by also comprising a contraction opening, wherein the contraction opening is fixedly communicated with the bottom end of the telescopic pipe; the contraction port comprises a hollow ring section, a solid section, a second pull wire, a manufacturing rod and a pull wire adjusting part;

4. The bone cement filling apparatus of claim 1, wherein the void ring segment occupies 1/3-1/4 of the bottom ring length.