WO2020125605A1

WO2020125605A1 - Negative pressure suction-type bone cement injection device and injection method

Info

Publication number: WO2020125605A1
Application number: PCT/CN2019/125864
Authority: WO
Inventors: 蔡金朝
Original assignee: 艾科美医疗器械（深圳）有限公司
Priority date: 2018-12-18
Filing date: 2019-12-17
Publication date: 2020-06-25
Also published as: CN109363762A

Abstract

A negative pressure suction-type bone cement injection device, comprising an inner cylinder (13), an intermediate cylinder (22), and an outer cylinder (23). The inner cylinder (13) is provided with a piston rod (11), and an inner needle tube (25) is mounted at a front end of the inner cylinder. A side wall of the intermediate cylinder (22) is provided with a suction pipe (221) connected to a vacuum pump device. A front end of the intermediate cylinder (22) is provided with an outer needle tube (24), the inner cylinder (13) is fixed inside the intermediate cylinder (22), and the inner needle tube (25) passes through the outer needle tube (24). The intermediate cylinder (22) is sleeved inside the outer cylinder (23) to form a movable structure. The device extracts air, bone powder, liquid blood, and blood clots at a bone site to be repaired by providing the suction pipe (221) on the side wall of the intermediate cylinder (22) in combination with a vacuum extraction device, so as to form a negative pressure in the bone cavity to suck bone cement into an injection device, such that pressure produced by pushing the piston rod (11) is prevented from causing the bone cement to seep out of a bone crack resulting in nerve compression and other adverse consequences. A manual pulling structure and a rotary driving structure are further utilized to facilitate causing the intermediate cylinder (22) to drive the inner cylinder (13) to move backwards, and a push rod (1) is not moved to realize bone cement injection. This supplements the negative pressure injection, and can also substitute the negative pressure injection when a negative pressure is unavailable. Further disclosed is a corresponding injection method.

Description

Negative pressure suction type bone cement perfusion device and method

[0001] The present invention relates to the technical field of medical devices, in particular to a bone cement perfusion device and perfusion method.

Background technique

[0002] When performing orthopedic surgery, in order to fix artificial joints, internal fixation of unstable fractures, etc., usually bone cement needs to be poured into the bones. The traditional bone cement infusion device adopts a positive pressure to push the piston rod to push the bone cement to move in the direction of pouring. However, this method of pushing the piston rod positively will form a large pressure, which will cause the bone cement to enter the repair Uncontrolled flow behind the bone cavity. Since the bones to be repaired are usually accompanied by fine bone cracks, under the effect of pressure, bone cement is likely to seep along the cracks, which may affect the nervous system and have serious consequences. In addition, during surgery, the area to be repaired is usually drilled with instruments first, which will produce bone meal, blood water and blood clots. These substances are more difficult to clean up by general methods and may flow to other parts and cause infection.

SUMMARY OF THE INVENTION

[0004] The technical problem to be solved by the present invention is to provide a negative-pressure suction type bone cement infusion device and method in which the design is more reasonable, the infusion method is more scientific, and bone cement can be prevented from leaking along the bone cracks.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A negative pressure suction type bone cement perfusion device, which is characterized by:

[0006] The inner cylinder is used to store bone cement, which is provided with a piston rod and an inner needle tube at the front end, which together constitute the final injection structure of bone cement;

[0007] The middle tube is used to evacuate the bone to be repaired. The side wall is provided with an extraction tube, which is connected to the vacuum device through the extraction tube; an outer needle tube is installed at the front end of the middle tube, and the inner tube is fixed inside the middle tube, The inner needle tube passes through the outer needle tube, and a gap for evacuating the bone to be repaired is provided between the inner tube and the middle tube and between the inner needle tube and the outer needle tube;

[0008] The outer cylinder is used to support the middle cylinder, the middle cylinder is sleeved inside the outer cylinder to form a movable structure, and the outer needle tube and the inner needle tube pass through the front end of the outer cylinder;

[0009] The inner cavity of the bone to be repaired is evacuated through the middle tube and the outer needle tube to form a negative pressure in the inner cavity, The bone cement in the inner cylinder is sucked into the inner cavity through the inner needle tube by the action of negative pressure.

[0010] Further, a pull ring is provided on the rear side of the middle cylinder, the suction pipe is aligned with the pull ring, and a guide groove is provided on the side wall of the middle and rear sections of the outer cylinder, and the pull ring and the suction pipe extend from the guide groove When a small part of the bone cavity is not perfused, the bone cement can be injected by pulling the pull ring to slowly move back along the guide groove to supplement the negative pressure suction and perfusion; on the outer side of the rear end of the outer cylinder A buckle is provided, and a cylinder cover is fixed by the buckle, the piston rod is connected and fixed with the cylinder cover, and the piston rod forms a fixed immovable structure by fixing the cylinder cover and the rear end of the outer cylinder.

[0011] Further, a hook rod with a hook is provided on the inner surface of the cylinder cover, and a clamping hole is provided on the sidewall of the piston rod, and the piston rod and the cylinder are formed in the clamping hole by the clamping of the hook of the hook rod The fixing structure of the cover can achieve that the piston rod does not move during the pouring process, and does not cause forward pressure on the bone cement.

[0012] Further, a rack and a scale are provided on the outer side of the middle cylinder, the rack is aligned with the pull ring, the rack is embedded in a guide groove on the side wall of the outer cylinder to form a slideable structure forward and backward; a rotation adjustment is provided on the outer cylinder Mechanism, the rotation adjustment mechanism is clamped on the side wall of the outer cylinder through a snap ring on the outer cylinder; the rotation adjustment mechanism is docked with the rack, and the middle cylinder is moved backward by controlling the rotation adjustment mechanism to mesh with the rack and rotating the rotation adjustment mechanism to Complete the high-precision infusion of the final part of bone cement, and further complement the negative pressure inhalation infusion.

[0013] Further, the rotation adjustment mechanism includes a ring cover, the ring cover is formed by the butt joint of the first half cover and the second half cover, both of which are provided with button holes; Symmetrical pressing structure, including a first button member, a second button member and two linkage blocks, the inner surface of the first button member and the second button member is provided with a screw structure matching with the rack; the first button member is linked with a The blocks are arranged side by side in the first half cover, the second button piece and the other linkage block are arranged side by side in the second half cover, the button on the first button piece is exposed from the button hole of the first half cover, the second button piece The button on the top is exposed from the button hole of the second half cover; the two ends of the first button member and the second button member are respectively connected to the rotor through screws, and a spring is provided in the rotor, and the springs respectively pass through the hole sleeves at both ends of the linkage block On the spring columns in the first half cover and the second half cover; the button of the first button member is pressed against the link block side by side, and the button of the second button member is pressed against the link block side by side; The button of the button pushes the first button and the second button to move towards each other, so that the thread on the inner surface of the two engages with the rack of the middle cylinder. At this time, rotating the ring cover can push the rack to move backward, so that the middle The cylinder moves backward with the inner cylinder, thereby pressing the bone cement in the inner cylinder into the bone; after releasing the button, under the elastic force of the spring, the first button member and the second button member are respectively directed toward the first half cover and Second half cover push And reset the corresponding linkage block. By turning the rotation adjustment mechanism and matching the scale on the middle cylinder, high-precision infusion of bone cement can be achieved.

[0014] Further, it also includes an injection stirring device, which includes an injection plunger, a piston and a syringe, a funnel is installed at the front end of the syringe to form a structure for injecting bone cement, the funnel is removed, and inserted into the front end of the syringe The mixing rod forms a mixing device structure for mixing bone cement. When the bone cement needs to be injected into the infusion device, the stirring rod is also removed, and the injection push rod can be injected into the inner cylinder.

[0015] Further, a stirring impeller is installed at the front end of the stirring rod, and the stirring impeller is inserted into the injection barrel together with the front end of the stirring rod to form a stirring structure; a rear end of the stirring rod is provided with a puller that is convenient for fingers to pull to stir the stirring rod The buckle and the buckle form a ring-shaped structure, and the stirring impeller is rotated by pushing and pulling the stirring rod, so as to stir the bone cement of the syringe.

[0016] Further, after the stirring rod is inserted into the syringe, the syringe cover, the waterproof ring and the waterproof ring cover sleeved on the stirring rod are fixed together at the front end of the syringe to form a leak-proof structure, wherein the syringe cover and the syringe The front end is fixed, the waterproof ring seals the gap between the stirring rod and the syringe cover, and the waterproof ring cover fixes the waterproof ring in the syringe cover.

[0017] A negative pressure suction type bone cement infusion method, characterized in that: a vacuum system is provided to evacuate the bone cavity through a vacuum needle tube to form a negative pressure in the bone cavity, and at the same time the bone cement infusion needle tube Inserted into the bone cavity, under the negative pressure of the bone cavity, the bone cement in the infusion device is automatically sucked into the bone cavity to complete the bone cement infusion.

[0018] Further, the needle tube used for evacuation is an outer needle tube, the needle tube used for infusion of bone cement is an inner needle tube, the inner needle tube is smaller than the outer needle tube, and is longer than the outer needle tube, the inner needle tube passes through the outer needle tube, the two There is a gap between the airflow. When the outer needle tube is evacuated, the bone lumen forms a negative pressure and the bone cement is sucked through the inner needle tube. While vacuuming, the air, bone meal, blood water and blood clots of the bone to be repaired can also be evacuated to prevent the above substances from flowing to other parts and causing infection.

[0019] The present invention extracts air, bone meal, blood water and blood clots in the bone to be repaired by providing an extraction tube on the side wall of the middle cylinder and a vacuum extraction device, which not only prevents the above substances from flowing to other parts and causes infection after extraction, but also enables The bone cavity of the site to be repaired basically reaches a vacuum environment, so that the bone cement in the infuser can be sucked through the negative pressure to achieve perfusion, to avoid the pressure caused by pushing the piston rod to cause the bone cement to seep out of the bone cracks and cause nerve compression as a result of. In addition, it is supplemented by manual pulling structure and rotating driving structure The middle cylinder drives the inner cylinder to move backwards, and the push rod does not move to achieve bone cement infusion, which supplements the negative pressure infusion method. Of course, it can also substitute when the negative pressure infusion method cannot be used.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a perspective structural view of an infusion device of the present invention;

[0022] FIG. 2 is a plan view of the infuser of the present invention;

[0023] FIG. 3 is a sectional view taken along line A-A of FIG. 2;

[0024] FIG. 4 is a longitudinal cross-sectional structural view of the infuser of the present invention;

[0025] FIG. 5 is a sectional view taken along line C-C in FIG. 2;

[0026] FIG. 6 is a D-D sectional view of FIG. 2;

[0027] FIG. 7 is an exploded structural view of the infuser of the present invention;

[0028] FIG. 8 is an exploded structural view of the rotation adjusting mechanism of the present invention;

[0029] FIG. 9 is a perspective structural view of an injection device of the present invention;

[0030] FIG. 10 is a perspective structural view of the stirring device of the present invention;

[0031] FIG. 11 is a schematic sectional view of the stirring device of the present invention;

[0032] FIG. 12 is an exploded structural view of the injection stirring device of the present invention.

In the figure, 1 is an injection plunger, 2 is a piston, 3 is a syringe, 4 is a funnel, 5 is a stirring impeller, 6 is a stirring rod, 61 is a buckle, 7 is a syringe cover, 8 is a waterproof ring , 9 is the waterproof ring cover, 10 is the cylinder cover, 101 is the hook rod, 11 is the piston rod, 111 is the clamping hole, 12 is the rotating adjustment mechanism, 13 is the inner cylinder, 14 is the first half cover,

15 is the linkage block, 16 is the first button member, 17 is the spring, 18 is the rotor, 19 is the screw, 20 is the second button member, 21 is the second half cover, 22 is the middle tube, 221 is the exhaust pipe, 222 is For the rack, 223 is a pull ring, 23 is an outer cylinder, 231 is a guide groove, 232 is a snap ring, 233 is a snap, 24 is an outer needle tube, 25 is an inner needle tube, 26 is a button hole, and 27 is a spring column.

DETAILED DESCRIPTION

[0035] In this embodiment, referring to FIGS. 1-8, the negative pressure suction type bone cement infusion device includes,

[0036] The inner cylinder 13 is used for storing bone cement, and a piston rod 11 is provided therein, and an inner needle tube 25 is installed at the front end, and the three together constitute the final injection structure of bone cement;

[0037] The middle tube 22 is used to evacuate the bone to be repaired. The side wall is provided with an extraction tube 221, and a vacuum extraction device (not shown) is connected through the extraction tube 221; an outer needle tube is installed at the front end of the middle tube 22 24, inner cylinder 13 fixed Inside the middle tube 22, and the inner needle tube 25 (longer than the outer needle tube 24) passes through the outer needle tube 24, between the inner tube 13 and the middle tube 22 and between the inner needle tube 25 and the outer needle tube 24 are provided for bone Vacuum clearance of the part to be repaired;

[0038] The outer cylinder 23 is used to support the middle cylinder 22, the middle cylinder 22 is sleeved inside the outer cylinder 23 to form a movable structure, and the outer needle tube 24 and the inner needle tube 24 pass through the front end of the outer cylinder 23;

[0039] The inner cavity of the bone to be repaired is evacuated through the middle tube 22 and the outer needle tube 24, so that the inner cavity forms a negative pressure, and the bone cement in the inner tube 13 is sucked into the inner needle tube 13 through the inner needle tube 24 In the lumen.

[0040] A pull ring 223 is provided on the rear side of the middle tube 22, the suction pipe 221 is aligned with the pull ring 223, and a guide groove 231 is provided on the middle rear wall of the outer tube 23, and the pull ring 223 and the suction pipe 221 are arranged from The guide groove 231 protrudes. When a small part of the bone cavity is not infused, you can pull the pull ring 223 to slowly move back along the guide groove 231 to inject bone cement to supplement the negative pressure inhalation and perfusion A buckle 233 is provided on the outer side of the rear end of the outer cylinder 23, a cylinder cover 10 is fixed by the buckle 233, the piston rod 11 is connected and fixed to the cylinder cover 10, and the cylinder rod 10 is fixed to the rear end of the outer cylinder 23 to make the piston rod 11 Form a fixed immobile structure.

[0041] The inner surface of the cylinder cover 10 is provided with a hook the hook rod card 101, the card is provided with holes 111 on the side wall of the piston rod 11, the card 1 by the hook ₁₀ hook rod chucking hole is formed in the card m The fixing structure of the piston rod 11 and the cylinder cover 10 can achieve that the piston rod 11 does not move during the pouring process, and does not cause forward pressure on the bone cement.

[0042] A rack 222 and a scale are provided on the outer surface of the middle cylinder 22, the rack 222 is aligned with the pull ring 223, and the rack 222 is embedded in a guide groove 231 on the side wall of the outer cylinder 23 to form a slideable structure forward and backward; A rotation adjusting mechanism 12 is provided on the side wall of the outer cylinder 23 via a snap ring 232 on the outer cylinder 23; the rotation adjusting mechanism 12 is docked with the rack 222 and is engaged with the rack 222 by controlling the rotation adjustment mechanism 12 At the same time, the rotation adjustment mechanism 12 is rotated to realize the backward movement of the middle cylinder 22 to complete the high-precision infusion of the final part of bone cement, which further supplements the negative pressure inhalation infusion.

[0043] The rotation adjustment mechanism 12 includes a ring cover, the ring cover is formed by the first half cover 14 and the second half cover 21 butted, both of which are provided with a button hole 26; A symmetrical pressing structure, including a first button member 16, a second button member 20 and two linkage blocks 15, the inner surface of the first button member 16 and the second button member 20 is provided with a screw structure matching the rack 222; The first button member 16 and a linkage block 15 are arranged side by side in the first half cover 14, the second button member 20 and the other linkage block 14 are arranged side by side in the second half cover 21, the buttons on the first button member 16 are The button hole 26 of the first half cover 14 is exposed, and the button on the second button member 20 is removed from the second The button hole 26 of the half cover 21 is exposed; the two ends of the first button member 16 and the second button member 20 are respectively connected to the rotor 18 through screws 19, and a spring 17 is provided in the rotor 18, and the spring 17 respectively passes through the linkage block The holes at both ends of 15 are sleeved on the spring columns 27 in the first half cover 14 and the second half cover 21; the button of the first button member 16 is pressed against the link block 15 side by side, and the button of the second button member 20 is pressed On the interlocking block 15 parallel to itself; by pressing the buttons of the two button members, the first button member 16 and the second button member 20 are moved toward each other, so that the threads on the inner surfaces of the two engage with the rack 222 of the middle cylinder 22, When the ring cover is rotated, the rack 222 can be pushed back, so that the middle cylinder 22 can move backward with the inner cylinder 13 to press the bone cement in the inner cylinder 13 into the bone; after releasing the button, the spring 17 Under the action of the elastic force, the first button member 16 and the second button member 20 are pushed toward the first half cover 14 and the second half cover 21, respectively, and drive the corresponding linkage block 15 to reset. By turning the rotation adjustment mechanism 12 and matching the scale on the middle cylinder 22, high-precision bone cement pouring can be achieved. For example, if it is preset to inject 4ML bone cement, then pull the pull ring 223 to make the marking line reach the corresponding scale, but if it is not convenient to perform precise operation by pulling because the dose is small, stop pulling when the marking line reaches the corresponding scale soon When the button is pressed, the entire rotation adjustment mechanism 12 will contact the rack on the side wall of the middle cylinder 22 and fix the middle cylinder 22 and the outer cylinder 23 so that they cannot continue to move. Then, the rotation adjustment mechanism 12 is rotated, and the inner cylinder 13 will slowly move backward, so that the perfusion amount can be accurately controlled.

[0044] Referring to FIGS. 9-12, an injection stirring device is also included, which includes an injection plunger 1, a piston 2, and a syringe 3. A funnel 4 is installed at the front end of the syringe 3 to form a structure for injecting bone cement. The funnel 4 is removed, and a stirring rod 6 is inserted into the front end of the syringe 3 to form a stirring device structure for stirring bone cement. When the bone cement needs to be injected into the infuser, the stirring rod 6 is also removed, and the injection push rod 1 is pushed to inject the bone cement into the inner cylinder 13.

[0045] A stirring impeller 5 is installed at the front end of the stirring rod 6, and the stirring impeller 5 is inserted into the injection barrel 3 along with the front end of the stirring rod 6 to form a stirring structure; a rear end of the stirring rod 6 is provided with a finger buckle to facilitate stirring The buckle 61 of the rod is formed into a ring-shaped structure, and the agitating impeller 5 is rotated by pushing and pulling the agitating rod 6 to agitate the bone cement in the syringe 3.

[0046] After the stirring rod 6 is inserted into the syringe 3, the syringe cover 7, the waterproof ring 8 and the waterproof ring cover 9 sleeved on the stirring rod 6 are fixed together at the front end of the syringe 3 to form a leak-proof structure, wherein the syringe cover 7 is fixed to the front end of the syringe 3, the waterproof ring 8 seals the gap between the stirring rod 6 and the syringe cover 7, and the waterproof ring cover 9 fixes the waterproof ring 8 in the syringe cover 7.

[0047] The negative pressure suction type bone cement infusion method is provided with a vacuum system to evacuate the bone cavity through a vacuum needle Vacuum is applied to form a negative pressure in the bone cavity. At the same time, a needle tube for injecting bone cement is inserted into the bone cavity. Under the negative pressure of the bone cavity, the bone cement in the infusion device is automatically sucked into the bone cavity to complete the bone cement perfusion.

[0048] The needle tube used for evacuation is an outer needle tube 24, and the needle tube used for infusion of bone cement is an inner needle tube 25. The inner needle tube 25 is smaller than the outer needle tube 24, and is longer than the outer needle tube 24. The inner needle tube 25 passes through the outer needle tube 24 However, there is an air gap between the two. When the outer needle tube 24 is evacuated, the bone lumen forms a negative pressure to draw bone cement through the inner needle tube 25. While vacuuming, the air, bone meal, blood water and blood clots of the bone to be repaired can also be evacuated to prevent the above substances from flowing to other parts and causing infection.

[0049] The present invention has been described in detail above. The above are only preferred embodiments of the present invention. When the scope of the present invention cannot be limited, that is, all changes and modifications made in accordance with the scope of the present application should be It still falls within the scope of the present invention.

Summary of the invention

technical problem

Solution to the problem

Beneficial effects of invention

Claims

[Claim 1] A negative pressure suction type bone cement perfusion method, characterized in that: a vacuum system is provided to evacuate the bone cavity through a vacuum needle tube to form a negative pressure in the bone cavity, and at the same time the bone cement is perfused The needle tube is inserted into the bone cavity, and under the negative pressure of the bone cavity, the bone cement in the infusion device is automatically sucked into the bone cavity to complete the bone cement infusion.

[Claim 2] The negative pressure suction bone cement infusion method according to claim 1, characterized in that: the needle tube used for evacuation is an outer needle tube, the needle tube used for infusion of bone cement is an inner needle tube, and the inner needle tube is from the outside The needle tube passes through, and there is an air gap between the two. When the outer needle tube is evacuated, a negative pressure is formed in the bone cavity to suck the bone cement through the inner needle tube.

[Claim 3] A negative pressure suction type bone cement perfusion device, characterized in that it includes,

The inner cylinder is used to store bone cement, which has a piston rod and an inner needle tube at the front end, which together constitute the final injection structure of bone cement;

The middle tube is used to evacuate the bone to be repaired. The side wall is provided with a suction tube, which is connected to the vacuum device through the suction tube; an outer needle tube is installed at the front end of the middle tube, the inner tube is fixed inside the middle tube, and the inner needle tube Passing out of the outer needle tube, there is a gap between the inner tube and the middle tube and between the inner needle tube and the outer needle tube to evacuate the bone to be repaired; the outer tube is used to support the middle tube, and the middle tube is sleeved on A movable structure is formed inside the outer cylinder, and the outer needle tube and the inner needle tube pass through the front end of the outer cylinder;

The inner cavity of the bone to be repaired is evacuated through the middle tube and the outer needle tube to form a negative pressure in the inner cavity, and the bone cement in the inner tube is sucked into the inner cavity through the inner needle tube by the action of the negative pressure.

[Claim 4] The negative-pressure suction type bone cement infusion device according to claim 3, characterized in that: a pull ring is provided on the rear side of the middle cylinder, and a guide groove is provided on the side wall of the middle and rear sections of the outer cylinder , The pull ring and the suction pipe protrude from the guide groove; a buckle is provided on the outer side of the rear end of the outer cylinder, a cylinder cover is fixed by the buckle, the piston rod is connected and fixed to the cylinder cover, and the cylinder cover is connected to the outer cylinder The fixed rear end makes the piston rod form a fixed immobile structure.

[Claim 5] The negative pressure suction type bone cement infusion device according to claim 4, characterized in that: a hook bar with a hook is provided on the inner surface of the cylinder cover, and a hole is provided on the side wall of the piston rod , By card The hook of the hook rod is clamped in the clamping hole to form a fixing structure of the piston rod and the cylinder cover.

[Claim 6] The negative-pressure suction type bone cement infusion device according to claim 5, characterized in that: a rack and a scale are provided on the outer side of the middle cylinder, the rack is aligned with the pull ring, and the rack is embedded in the outer cylinder The guide groove on the side wall forms a slideable structure forward and backward; a rotation adjustment mechanism is provided on the outer cylinder, and the rotation adjustment mechanism is caught on the side wall of the outer cylinder through a snap ring on the outer cylinder; the rotation adjustment mechanism is docked with the rack, which is adjusted by controlling the rotation The mechanism meshes with the rack and rotates the rotation adjustment mechanism to realize the backward movement of the middle cylinder.

[Claim 7] The negative pressure suction type bone cement perfusion device according to claim 6, characterized in that: the rotation adjustment mechanism includes a ring cover, the ring cover is docked by the first half cover and the second half cover Both are provided with button holes; a symmetrical pressing structure is provided in the ring cover, including a first button member, a second button member and two linkage blocks, the first button member and the second button member The inner surface is provided with a screw structure matched with the rack; the first button member and one linkage block are arranged side by side in the first half cover, the second button member and the other linkage block are arranged side by side in the second half cover, and the first button The button on the piece is exposed from the button hole of the first half cover, and the button on the second button piece is exposed from the button hole of the second half cover; the two ends of the first button piece and the second button piece are respectively connected by screws The rotor is provided with a spring in the rotor, and the springs are respectively sleeved on the spring columns in the first half cover and the second half cover through the holes at the two ends of the linkage block; the button of the first button member is pressed against the linkage block side by side, The buttons of the two button pieces are pressed against the linkage block side by side; by pressing the buttons of the two button pieces, the first button piece and the second button piece are moved toward each other, so that the threads on the inner surface of the two buttons and the rack of the middle cylinder are caught At this time, rotating the ring cover can push the rack back to move the middle cylinder with the inner cylinder backward, thereby pressing the bone cement in the inner cylinder into the bone; after releasing the button, the elastic force of the spring acts Next, push the first button member and the second button member toward the first half cover and the second half cover, respectively, and drive the corresponding linkage blocks to reset.

[Claim 8] The negative-pressure suction type bone cement infusion device according to claim 7, further comprising: an injection stirring device, which includes an injection push rod, a piston and a syringe, and a funnel is installed at the front end of the syringe A structure for injecting bone cement is formed, and a mixing rod is inserted at the front end of the injection barrel to form a structure of a mixing device for mixing bone cement.

[Claim 9] The negative pressure suction type bone cement infusion device according to claim 8, characterized in that: a stirring impeller is installed at the front end of the stirring rod, and the stirring impeller is inserted into the injection cylinder together with the front end of the stirring rod to form a stirring structure The rear end of the stirring rod is provided with a pull buckle which is convenient for fingers to pull to pull the stirring rod, and the pull buckle forms a ring structure.

[Claim 10] The negative-pressure suction type bone cement infusion device according to claim 6, characterized in that: after the stirring rod is inserted into the syringe, the syringe cover, the waterproof ring and the waterproof ring cover sleeved on the stirring rod are put together The front end of the syringe is fixed to form a leak-proof structure, wherein the syringe cover is fixed to the front end of the syringe, the waterproof ring seals the gap between the stirring rod and the syringe cover, and the waterproof ring cover fixes the waterproof ring in the syringe cover.