Medical large bone cement filler

Abstract

The present invention discloses a large-scale medical bone cement filler, including a tube, a tube sleeve, a first piston and a piston rod. The tube sleeve is threadedly connected and fixed at the end of the tube. The end of the tube sleeve has a discharge hole, and the surface of the discharge hole is threadedly fixedly connected with a mud discharge pipe. The inner side of the tube end is threadedly connected with a pressure relief device. The pressure relief device includes a fixed shell, a stopper is fixedly provided on one side of the fixed shell, a plurality of through holes are provided on the surface of the stopper, and a telescopic sleeve is fixedly connected to the middle of one side of the stopper. The present invention drives the sealing block to return to its original position through the spring recovery deformation in the pressure relief device, and the sealing block contacts the surface of the annular protruding block, thereby avoiding excessive overflow of bone cement, thereby avoiding affecting the operation, and reducing the pain of the patient. A suction tube is provided on the side wall of the tube, and blood and body fluids can be sucked into the suction tube through the catheter, which is beneficial to improving the surgical effect.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a large medical bone cement filler. Background Art

[0002] Vertebral compression fractures are the most common complications in osteoporosis patients. Previous open surgical treatments were traumatic and had many complications. Percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) are new minimally invasive surgical procedures that have developed rapidly in spinal surgery in recent years. They enhance the mechanical stability of the diseased vertebral body by directly injecting bone cement, artificial bone and other fillers into the compressed vertebral body through the skin or by first dilating the vertebral body with a balloon and then injecting them. Clinical applications have proven that they are stable, reliable, rapid and effective in treatment, with few complications.

[0003] In minimally invasive surgery, a filler is needed to push bone cement. Usually, the capacity of a bone cement filler is relatively small. During the filling process, when the pushing force on the surface of the piston rod 4 is removed, the bone cement will continue to overflow from the barrel 1, which will not only affect the operation but also cause pain to the patient.

[0004] Therefore, it is necessary to invent a large medical bone cement filler to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a large medical bone cement filler to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large medical bone cement filler, comprising a tube, a tube sleeve, a first piston and a piston rod, the tube sleeve is threadedly connected and fixed to the end of the tube, the end of the tube sleeve has a discharge hole, and the surface of the discharge hole is threadedly fixedly connected with a mud discharge pipe, the inner side of the tube end is threadedly connected with a pressure relief device, the pressure relief device comprises a fixed shell, a stopper is fixedly provided on one side surface of the fixed shell, a plurality of through holes are opened on the surface of the stopper, a telescopic sleeve is fixedly connected to the middle part of one side of the stopper, a spring is provided inside the telescopic sleeve, and the spring The two ends of the spring are respectively fixedly connected to the two ends of the telescopic sleeve, the side wall of the fixed shell has an annular protrusion block, a sealing block is arranged on one side of the annular protrusion block, a bearing is fixedly arranged at one end of the telescopic sleeve, a threaded rod is threadedly connected to the middle of the sealing block, and the end of the threaded rod is fixedly connected to the middle of the bearing, a suction tube is arranged on the side wall of the barrel, a second piston is arranged inside the suction tube, a U-shaped rod is fixedly arranged on one side of the second piston, a sliding groove is opened on the side wall of the suction tube, a slider is slidably arranged inside the sliding groove, and the other end of the U-shaped rod of the slider is fixedly connected to the side wall of the slider.

[0007] Preferably, a buckle is fixedly provided on the side wall of the barrel, and an annular groove is provided on the surface of the pipette, and the annular groove is matched with the buckle.

[0008] Preferably, the end of the liquid suction tube is fixedly connected with a liquid guide tube, and the liquid guide tube and the mud discharge tube are fixed to each other via an adhesive tape.

[0009] Preferably, the end of the bobbin has a handshake portion.

[0010] Preferably, the side wall of the bobbin has an observation window, and a scale bar is provided on the surface of the observation window.

[0011] Preferably, a placement groove for placing a wrench is provided on the end surface of the fixed shell.

[0012] Technical effects and advantages of the present invention:

[0013] 1. The present invention is provided with a pressure relief device. When in use, the prepared bone cement is poured into the barrel, the first piston is inserted and pushed by the piston rod. Under the pushing and squeezing of the first piston, the bone cement flows into the fixed shell through the through hole on the surface of the block and fills it up. Then, the sealing block is pushed to one side to form a gap between the sealing block and the annular protruding block. The bone cement flows out of the gap and is output through the mud outlet pipe. When the piston rod stops being pushed, the bone cement inside the barrel loses the squeezing force, the spring restores the deformation and drives the sealing block to return to its original position. The sealing block contacts the surface of the annular protruding block, thereby avoiding excessive overflow of bone cement, thereby avoiding affecting the operation and reducing the pain of the patient.

[0014] 2. The present invention provides a suction tube through the side wall of the tube. When there is too much blood and body fluid inside the vertebral body, stop pushing the piston rod, and then pull the slider to the right. The slider drives the U-shaped rod to move, and the movement of the U-shaped rod can drive the second piston to move to the right. At this time, negative pressure is formed inside the suction tube, so that blood and body fluid can be sucked into the suction tube through the catheter, which is beneficial to improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall front view schematic diagram of the present invention.

[0016] Figure 2 It is a side cross-sectional schematic diagram of the present invention.

[0017] Figure 3 For the present invention Figure 2 Enlarged view of part A in the middle.

[0018] Figure 4 For the present invention Figure 1 Enlarged view of part B in the middle.

[0019] Figure 5 It is a U-shaped rod diagram of the present invention.

[0020] In the figure: 1 bobbin, 2 sleeve, 3 first piston, 4 piston rod, 5 mud outlet pipe, 6 pressure relief device, 601 fixed shell, 602 stopper, 603 through hole, 604 telescopic sleeve, 605 spring, 606 annular protruding block, 607 sealing block, 608 bearing, 609 threaded rod, 7 suction tube, 8 second piston, 9 U-shaped rod, 10 slide groove, 11 slider, 12 buckle, 13 liquid guide tube. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention provides Figure 1-5 A large medical bone cement filler is shown, comprising a barrel 1, a sleeve 2, a first piston 3 and a piston rod 4, the sleeve 2 is threadedly connected and fixed at the end of the barrel 1, the end of the sleeve 2 has a discharge hole, and the surface of the discharge hole is threadedly fixedly connected with a mud discharge pipe 5, the inner side of the end of the barrel 1 is threadedly connected with a pressure relief device 6, the pressure relief device 6 comprises a fixed shell 601, a stopper 602 is fixedly provided on one side surface of the fixed shell 601, a plurality of through holes 603 are opened on the surface of the stopper 602, a telescopic sleeve 604 is fixedly connected to the middle part of one side of the stopper 602, a spring 605 is arranged inside the telescopic sleeve 604, the two ends of the spring 605 are respectively fixedly connected to the two ends of the telescopic sleeve 604, and the side wall of the fixed shell 601 has an annular convex The block 606 is provided with a sealing block 607 on one side of the annular protruding block 606, a bearing 608 is fixedly provided at one end of the telescopic sleeve 604, a threaded rod 609 is threadedly connected to the middle of the sealing block 607, and the elastic force of the spring 605 can be adjusted by rotating the threaded rod 609, so that the filler can adapt to bone cements of different viscosities, and the end of the threaded rod 609 is fixedly connected to the middle of the bearing 608, a pipette 7 is provided on the side wall of the barrel 1, a second piston 8 is provided inside the pipette 7, a U-shaped rod 9 is fixedly provided on one side of the second piston 8, a slide groove 10 is provided on the side wall of the pipette 7, a slider 11 is slidably provided inside the slide groove 10, and the other end of the U-shaped rod 9 of the slider 11 is fixedly connected to the side wall of the slider 11.

[0023] Furthermore, in the above technical solution, a buckle 12 is fixedly provided on the side wall of the barrel 1, and an annular groove is provided on the surface of the pipette 7, and the annular groove is adapted to the buckle 12;

[0024] Furthermore, in the above technical solution, the end of the liquid suction pipe 7 is fixedly connected with a liquid guide pipe 13, and the liquid guide pipe 13 and the mud discharge pipe 5 are fixed to each other via an adhesive tape;

[0025] Further, in the above technical solution, the end of the bobbin 1 has a handshake portion;

[0026] Furthermore, in the above technical solution, the side wall of the bobbin 1 has an observation window, and a scale bar is provided on the surface of the observation window, which is convenient for intuitively understanding the extrusion amount;

[0027] Furthermore, in the above technical solution, a placement groove for placing a wrench is provided on the end surface of the fixed shell 601, so as to facilitate taking out the pressure relief device 6 and cleaning it.

[0028] Working principle of the present invention:

[0029] Refer to the instruction manual Figure 1-5 When in use, the prepared bone cement is poured into the barrel 1, inserted into the first piston 3 and pushed by the piston rod 4. Under the pushing and squeezing of the first piston 3, the bone cement flows into the fixed shell 601 through the through hole 603 on the surface of the stopper 602 and fills it up. Then, the sealing block 607 is pushed to one side to form a gap between the sealing block 607 and the annular protruding block 606. The bone cement flows out of the gap and is output through the mud outlet pipe 5. When the piston rod 4 stops pushing, the bone cement inside the barrel 1 loses the squeezing force, and the spring 605 recovers its deformation to drive the sealing block 607 to return to its original position. The sealing block 607 contacts the surface of the annular protruding block 606, thereby avoiding excessive overflow of bone cement and thus avoiding affecting the operation.

[0030] Refer to the instruction manual Figure 1 A suction tube 7 is arranged on the side wall of the tube 1. When there is too much blood and water inside the vertebral body, the piston rod 4 is stopped from being pushed. At this time, the slider 11 is pulled to the right, and the slider 11 drives the U-shaped rod 9 to move. The movement of the U-shaped rod 9 can drive the second piston 8 to move to the right. At this time, negative pressure is formed inside the suction tube 7, so that the blood and water can be sucked into the suction tube through the catheter 13, which is beneficial to improve the surgical effect.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large medical bone cement filler, comprising a tube (1), a tube sleeve (2), a first piston (3) and a piston rod (4), wherein the tube sleeve (2) is threadedly connected and fixed to the end of the tube (1), the end of the tube sleeve (2) has a discharge hole, and a mud discharge pipe (5) is threadedly fixedly connected to the surface of the discharge hole, characterized in that: The inner side of the end of the bobbin (1) is threadedly connected with a pressure relief device (6), and the pressure relief device (6) comprises a fixed shell (601), a stopper (602) is fixedly provided on one side surface of the fixed shell (601), a plurality of through holes (603) are provided on the surface of the stopper (602), a telescopic sleeve (604) is fixedly connected to the middle part of one side of the stopper (602), a spring (605) is provided inside the telescopic sleeve (604), two ends of the spring (605) are respectively fixedly connected to two ends of the telescopic sleeve (604), a side wall of the fixed shell (601) has an annular protruding block (606), and a sealing member is provided on one side of the annular protruding block (606). The sealing block (607) is provided with a bearing (608) fixedly disposed at one end of the telescopic sleeve (604), a threaded rod (609) is threadedly connected to the middle of the sealing block (607), the end of the threaded rod (609) is fixedly connected to the middle of the bearing (608), a liquid suction tube (7) is disposed on the side wall of the barrel (1), a second piston (8) is provided inside the liquid suction tube (7), a U-shaped rod (9) is fixedly disposed on one side of the second piston (8), a sliding groove (10) is provided on the side wall of the liquid suction tube (7), a sliding block (11) is slidably disposed inside the sliding groove (10), and the other end of the U-shaped rod (9) of the sliding block (11) is fixedly connected to the side wall of the sliding block (11), The side wall of the tube (1) is fixedly provided with a buckle (12), and the surface of the liquid pipette (7) is provided with an annular groove, and the annular groove is adapted to fit the buckle (12). The end of the liquid suction pipe (7) is fixedly connected to a liquid guide pipe (13), and the liquid guide pipe (13) and the mud discharge pipe (5) are fixed to each other via an adhesive tape.

2. The large medical bone cement filler as claimed in claim 1, characterized in that: The end of the bobbin (1) is provided with a handgrip portion.

3. The large medical bone cement filler as claimed in claim 1, characterized in that: The side wall of the bobbin (1) is provided with an observation window, and a scale bar is arranged on the surface of the observation window.

4. The large medical bone cement filler as claimed in claim 1, characterized in that: The end surface of the fixed shell (601) is provided with a placement groove for placing a wrench.

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