Medical small bone cement filler

Abstract

The present invention discloses a small medical bone cement filler, including a barrel, a sleeve and an injection stirring device, wherein the sleeve is threadedly connected and fixed at the end of the barrel, the end of the sleeve has a discharge hole, and a hole cap is threadedly fixedly connected on the surface of the discharge hole, and the injection stirring device includes a base, a stirring blade and a stirring fan, the base is movably arranged inside the barrel, and both sides of the base have a first adjustment groove and a second adjustment groove, and a fixing device is embedded inside the side wall of the second adjustment groove. The present invention is provided with a stirring fan, and the annular sleeve is driven to rotate by the screw transmission principle, so that the stirring blade can be driven to rotate. When the second movable tube moves back and forth, the stirring blade at its end will also mix the mixture left and right, and the use of the stirring fan can improve the stirring effect of the mixture. At the same time, by placing the base for pushing bone cement inside the barrel in advance, it can not only avoid the entry of a large amount of air, but also save time.

Description

Technical Field

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

[0002] At present, vertebral compression fractures are the most common complication in patients with osteoporosis. 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 vertebra by directly injecting bone cement, artificial bone and other fillers into the compressed vertebral body through the skin or by first expanding the vertebra with a balloon, thereby enhancing the mechanical stability of the diseased vertebra. Clinical applications have proven that they are stable and reliable, have good therapeutic effects, and have few complications. Bone cement filler is an important instrument in this type of minimally invasive surgical operation. During the use of the existing bone cement filler, the mixture inside the barrel 1 needs to be stirred first, and then the stirring rod is taken out and the piston core rod is inserted for injection. Stirring in the barrel 1 with the stirring rod is not only not uniform, but also easily causes soreness in the doctor's hands, which has a certain impact on the operation. At the same time, a large amount of air will be introduced when the piston core rod is inserted, which is difficult to expel. At the same time, due to the complex and changeable situation during the operation, the bone cement has to be re-prepared if the best time for use is missed, which undoubtedly increases the patient's pain and the doctor's workload, and also causes a waste of bone cement materials.

[0003] Therefore, it is necessary to invent a medical small-sized bone cement filler to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a small medical bone cement filler to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small medical bone cement filler, comprising a barrel, a sleeve and an injection stirring device, the sleeve being threadedly connected and fixed at the end of the barrel, the end of the sleeve having a discharge hole, and a hole cap being threadedly fixedly connected on the surface of the discharge hole, the injection stirring device comprising a base, a stirring blade and a stirring fan, the base being movably arranged inside the barrel, both sides of the base having a first adjustment groove and a second adjustment groove, a fixing device being embedded inside the side wall of the second adjustment groove, an adjusting rod being arranged on one side of the fixing device, the end of the adjusting rod being hinged to the second adjustment groove, a through hole being arranged in the middle of the base, a first movable tube being arranged inside the through hole, a second movable tube being sleeved inside the first movable tube, and an internal thread being provided on the inner wall of the through hole The outer wall of the end of the first movable tube is provided with an external thread, the middle part of the first movable tube is provided with an internal thread, the outer wall of the middle part of the second movable tube is provided with an external thread, the stirring fan comprises an outer ring shell and an inner ring block, the middle part of the outer ring shell is provided with an annular groove, the surface of the inner ring block has a plurality of balls, the balls are adapted to the annular groove, the middle part of the inner ring block has an annular sleeve, a stirring sheet is arranged between the annular sleeve and the inner ring block, the side wall of the outer ring shell has a protruding rod, the side wall of the protruding rod is fixedly connected with a connecting rod, the connecting rod is arranged inside the first adjusting groove, and is fixedly connected with a first spring, the end of the first spring is fixedly connected with the first adjusting groove, the end of the second movable tube is fixedly connected with a screw rod, the end of the screw rod passes through the annular sleeve and is fixedly connected with the stirring blade.

[0006] Preferably, the fixing device includes a fixed shell, a second spring is fixedly arranged inside the fixed shell, a movable block is fixedly connected to the end of the second spring, a clamping block is fixedly connected to the end of the movable block, a ball is provided on the surface of the clamping block, a pull rod is arranged inside the second spring, one end of the pull rod is fixedly connected to the movable block, and the other end of the pull rod passes through the fixed shell and is hinged to the side wall of the adjusting rod.

[0007] Preferably, the inner ring block, the stirring blade and the annular sleeve are integrally formed.

[0008] Preferably, a thread groove is provided on the inner wall of the annular sleeve, and the screw rod is threadably connected to the annular sleeve.

[0009] Preferably, the inner wall of the barrel has a guide groove and a clamping groove, and the clamping block is adapted to the clamping groove.

[0010] Preferably, a breakable handshake portion is fixedly connected to the end of the second movable tube for pulling the second movable tube back and forth.

[0011] Preferably, a support sleeve is sleeved on the surface of the first movable tube, a bearing is fixedly arranged between the support sleeve and the first movable tube, push rods are fixedly connected to both ends of one side of the support sleeve, and the end of the push rod is in contact with the connecting rod.

[0012] Preferably, the fixing sleeve at the end of the base is provided with a sealing gasket, the side wall of the stirring blade is provided with a sealing sleeve, and the sealing sleeve is sleeved on the surface of the screw rod.

[0013] Preferably, the end of the tube surface has a hook portion for placing a finger, and the end of the first movable tube is fixedly sleeved with an auxiliary block for placing a thumb.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention adopts a simple structural arrangement. When preparing bone cement, the tube sleeve with the hole cap fixed is fixed to the end of the tube. At this time, the pre-mixed mixture is placed inside the tube, and the base is placed inside the tube along the guide groove on the inner wall of the tube. When the block in the base side wall fixing device is inserted into the groove on the side wall of the tube, the base is fixed. At this time, the first movable tube is rotated, and the first movable tube can be fixed on the base through the external thread on the outer wall of the first movable tube and the internal thread on the inner wall of the through hole. When the first movable tube is rotated and fixed to one side of the base, the support sleeve on the surface of the first movable tube drives the push rod to abut against the end of the connecting rod and pushes The connecting rod moves, and the movement of the connecting rod can drive the stirring fan to move, so that the stirring fan can be located in the middle position of the mixture. At this time, the second movable tube is pulled back and forth through the handshake part at the end of the second movable tube, and the annular sleeve is driven to rotate by the screw transmission principle, so as to drive the stirring blade to rotate. When the second movable tube moves back and forth, the stirring blade at its end will also mix the mixture left and right. The use of the stirring fan together can improve the stirring effect of the mixture and effectively improve the mixing efficiency. The present invention only needs to easily pull the second movable tube back and forth to complete the stirring work, which greatly reduces the workload of doctors and avoids the occurrence of situations that affect surgery.

[0016] 2. During the static reaction period after stirring, the second movable tube is pulled to the right through the handshake part, and the second movable tube is rotated to be threadedly connected with the internal thread inside the first movable tube through the external thread on its surface, and then the first movable tube is rotated to move the first movable tube to a suitable position, so that the first spring can drive the connecting rod to return to its original position, so that the stirring fan fits against the side wall of the sealing gasket. During this process, the stirring blades at the end of the second movable tube can plug the hollow structure of the annular sleeve in the stirring fan through the sealing sleeve on the side wall, and the other side of the annular sleeve can fit tightly with the sealing gasket. At this time, the handshake part is broken, and the end of the adjusting rod is pressed. The adjusting rod drives the block to disengage from the slot through the pull rod and pushes the first movable tube inward, so that the injection of bone cement can be completed through the base. By placing the base for pushing bone cement inside the barrel in advance, not only can a large amount of air be avoided from entering, but also time can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of the whole of the present invention.

[0018] Figure 2 It is a schematic cross-sectional view of the structure of the injection use state of the present invention.

[0019] Figure 3 For the present invention Figure 1 Enlarged view of part A in the middle.

[0020] Figure 4 For the present invention Figure 1 Enlarged view of part B in the middle.

[0021] Figure 5 For the present invention Figure 2 Enlarged view of part C in the middle.

[0022] Figure 6 It is a schematic cross-sectional view of the stirring fan structure of the present invention.

[0023] Figure 7 It is a side view of the stirring fan of the present invention.

[0024] Figure 8 It is an overall schematic diagram of the present invention.

[0025] In the figure: 1 bobbin, 2 sleeve, 3 injection stirring device, 4 base, 5 stirring blade, 6 stirring fan, 601 outer ring shell, 602 inner ring block, 603 annular groove, 604 annular sleeve, 605 stirring sheet, 606 protruding rod, 607 connecting rod, 7 first adjusting groove, 8 second adjusting groove, 9 fixing device, 901 second spring, 902 movable block, 903 clamping block, 904 pull rod, 10 adjusting rod, 11 through hole, 12 first movable tube, 13 second movable tube, 14 first spring, 15 screw rod, 16 clamping groove, 17 handshake part, 18 support sleeve, 19 push rod, 20 sealing pad, 21 hook part. DETAILED DESCRIPTION

[0026] 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.

[0027] The present invention provides Figure 1-8The medical small-scale bone cement filler comprises a barrel 1, a sleeve 2 and an injection stirring device 3. The sleeve 2 is threadedly fixed at the end of the barrel 1. The end of the sleeve 2 has a discharge hole, and a hole cap is threadedly fixedly connected on the surface of the discharge hole. The injection stirring device 3 comprises a base 4, a stirring blade 5 and a stirring fan 6. The base 4 is movably arranged inside the barrel 1. Both sides of the base 4 have a first adjustment groove 7 and a second adjustment groove 8. A fixing device 9 is embedded inside the side wall of the second adjustment groove 8. An adjusting rod 10 is arranged on one side of the fixing device 9. The end of the adjusting rod 10 is hinged to the second adjustment groove 8. A through hole 11 is provided in the middle of the base 4. A first movable tube 12 is arranged inside the through hole 11. A second movable tube 13 is sleeved inside the first movable tube 12. An inner thread is provided on the inner wall of the through hole 11. An outer thread is provided on the outer wall of the end of the first movable tube 12. An internal thread is provided inside the middle of the movable tube 12, and an external thread is provided on the outer wall of the middle of the second movable tube 13. The stirring fan 6 includes an outer ring shell 601 and an inner ring block 602. An annular groove 603 is provided in the middle of the outer ring shell 601. A plurality of balls are provided on the surface of the inner ring block 602, and the balls are adapted to the annular groove 603. An annular sleeve 604 is provided in the middle of the inner ring block 602, and a stirring sheet 605 is provided between the annular sleeve 604 and the inner ring block 602. A protruding rod 606 is provided on the side wall of the outer ring shell 601, and a connecting rod 607 is fixedly connected to the side wall of the protruding rod 606. The connecting rod 607 is arranged inside the first adjusting groove 7 and is fixedly connected to the first spring 14. The end of the first spring 14 is fixedly connected to the first adjusting groove 7. A screw rod 15 is fixedly connected to the end of the second movable tube 13, and the end of the screw rod 15 passes through the annular sleeve 604 and is fixedly connected to the stirring blade 5.

[0028] Further, in the above technical solution, the fixing device 9 includes a fixed shell, a second spring 901 is fixedly arranged inside the fixed shell, a movable block 902 is fixedly connected to the end of the second spring 901, a clamping block 903 is fixedly connected to the end of the movable block 902, a surface of the clamping block 903 has a ball, and the arrangement of the ball can improve the flexibility of the movement of the base 4, a pull rod 904 is arranged inside the second spring 901, one end of the pull rod 904 is fixedly connected to the movable block 902, and the other end of the pull rod 904 passes through the fixed shell and is hinged to the side wall of the adjusting rod 10;

[0029] Furthermore, in the above technical solution, the inner ring block 602, the stirring blade 605 and the annular sleeve 604 are integrally formed, and have good structural stability.

[0030] Furthermore, in the above technical solution, a thread groove is provided on the inner wall of the annular sleeve 604, and the screw rod 15 is threadedly connected to the annular sleeve 604;

[0031] Further, in the above technical solution, the inner wall of the bobbin 1 has a guide groove and a clamping groove 16, and the clamping block 903 is adapted to the clamping groove 16;

[0032] Furthermore, in the above technical solution, a breakable handshake portion 17 is fixedly connected to the end of the second movable tube 13 for pulling the second movable tube 13 back and forth.

[0033] Furthermore, in the above technical solution, a support sleeve 18 is sleeved on the surface of the first movable tube 12, a bearing is fixedly arranged between the support sleeve 18 and the first movable tube 12, and push rods 19 are fixedly connected at both ends of one side of the support sleeve 18, and the ends of the push rods 19 are in contact with the connecting rod 607.

[0034] Furthermore, in the above technical solution, a sealing gasket 20 is fixedly provided on the end of the base 4 , and a sealing sleeve is provided on the side wall of the stirring blade 5 , and the sealing sleeve is sleeved on the surface of the screw rod 15 .

[0035] Furthermore, in the above technical solution, the end of the surface of the tube 1 has a hook portion 21 for placing fingers, and the end of the first movable tube 12 is fixedly sleeved with an auxiliary block for placing the thumb, which is convenient for staff to use and improves operating comfort.

[0036] Working principle of the present invention:

[0037] Refer to the instruction manual Figure 1-8 When preparing bone cement, the sleeve 2 with the hole cap fixed is fixed to the end of the tube 1. At this time, the pre-mixed mixture is placed inside the tube 1, and the base 4 is placed inside the tube 1 along the guide groove on the inner wall of the tube 1. When the block 903 in the side wall fixing device 9 of the base 4 is inserted into the groove 16 on the side wall of the tube 1, the base 4 is fixed. At this time, the first movable tube 12 is rotated, and the external thread on the outer wall of the first movable tube 12 and the internal thread on the inner wall of the through hole 11 are threadedly connected to fix the first movable tube 12 on the base 4. When the first movable tube 12 is rotated and fixed to one side of the base 4, the The support sleeve 18 drives the push rod 19 to abut against the end of the connecting rod 607 and push the connecting rod 607 to move. The movement of the connecting rod 607 can drive the stirring fan 6 to move, so that the stirring fan 6 can be located in the middle of the mixture. At this time, the second movable tube 13 is pulled back and forth by the handshake portion 17 at the end of the second movable tube 13, and the annular sleeve 604 is driven to rotate by the transmission principle of the screw rod 15, so that the stirring blade 605 can be driven to rotate. When the second movable tube 13 moves back and forth, the stirring blade 5 at its end will also mix the mixture left and right. The use of the stirring fan 6 together with the stirring fan 6 can improve the stirring effect of the mixture and effectively improve the mixing efficiency.

[0038] Refer to the instruction manual Figure 2-5During the static reaction period after stirring, the second movable tube 13 is pulled to the right through the handshake portion 17, and the second movable tube 13 is rotated, and the external thread on its surface is threadedly connected with the internal thread inside the first movable tube 12, and then the first movable tube 12 is rotated to move the first movable tube 12 to a suitable position, so that the first spring 14 drives the connecting rod 607 to return to its original position, so that the stirring fan 6 fits against the side wall of the sealing gasket 20. In this process, the stirring blade 5 at the end of the second movable tube 13 can plug the hollow structure of the annular sleeve 604 in the stirring fan 6 through the sealing sleeve of the side wall, and the other side of the annular sleeve 604 can fit tightly with the sealing gasket 20. At this time, the handshake portion 17 is broken, and the end of the adjusting rod 10 is pressed. The adjusting rod 10 drives the block 903 to disengage from the card slot 16 through the pull rod 904, and pushes the first movable tube 12 inward, so that the injection of bone cement can be completed through the base 4.

[0039] 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 small medical bone cement filler, comprising a tube (1), a tube sleeve (2) and an injection stirring device (3), 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 hole cap is threadedly fixedly connected to the surface of the discharge hole, characterized in that: The injection stirring device (3) comprises a base (4), a stirring blade (5) and a stirring fan (6); the base (4) is movably arranged inside the barrel (1); the base (4) has a first adjustment groove (7) and a second adjustment groove (8) on both sides thereof; a fixing device (9) is embedded inside the side wall of the second adjustment groove (8); an adjusting rod (10) is arranged on one side of the fixing device (9); the end of the adjusting rod (10) is hinged to the second adjustment groove (8); a through hole (11) is provided in the middle of the base (4); a first movable tube (12) is arranged inside the through hole (11); a second movable tube (13) is sleeved inside the first movable tube (12); an inner wall of the through hole (11) is provided with an internal thread; an outer wall of the end of the first movable tube (12) is provided with an external thread; an inner middle of the first movable tube (12) is provided with an internal thread; an outer middle wall of the second movable tube (13) is provided with an external thread; the stirring fan (6) comprises an outer ring shell (601) and an inner ring block (602), wherein an annular groove (603) is provided in the middle of the outer ring shell (601), a plurality of balls are provided on the surface of the inner ring block (602), the balls are adapted to the annular groove (603), an annular sleeve (604) is provided in the middle of the inner ring block (602), a stirring blade (605) is provided between the annular sleeve (604) and the inner ring block (602), and a protruding The protruding rod (606) is fixedly connected to a connecting rod (607) on its side wall, the connecting rod (607) is arranged inside the first adjustment groove (7) and is fixedly connected to a first spring (14), the end of the first spring (14) is fixedly connected to the first adjustment groove (7), the end of the second movable tube (13) is fixedly connected to a screw rod (15), the end of the screw rod (15) passes through the annular sleeve (604) and is fixedly connected to the stirring blade (5), A support sleeve (18) is sleeved on the surface of the first movable tube (12), a bearing is fixedly arranged between the support sleeve (18) and the first movable tube (12), push rods (19) are fixedly connected to both ends of one side of the support sleeve (18), and the end of the push rod (19) is in contact with the connecting rod (607). A breakable handshake portion (17) is fixedly connected to the end of the second movable tube (13) and is used to pull the second movable tube (13) back and forth. The fixing device (9) comprises a fixing shell, a second spring (901) is fixedly arranged inside the fixing shell, a movable block (902) is fixedly connected to the end of the second spring (901), a clamping block (903) is fixedly connected to the end of the movable block (902), a surface of the clamping block (903) has a ball bearing, a pull rod (904) is arranged inside the second spring (901), one end of the pull rod (904) is fixedly connected to the movable block (902), and the other end of the pull rod (904) passes through the fixing shell and is hinged to the side wall of the adjusting rod (10).

2. The small medical bone cement filler according to claim 1, characterized in that: The inner ring block (602), the stirring blade (605) and the annular sleeve (604) are integrally formed.

3. The small medical bone cement filler according to claim 1, characterized in that: A thread groove is formed on the inner wall of the annular sleeve (604), and the screw rod (15) is threadably connected to the annular sleeve (604).

4. The small medical bone cement filler according to claim 2, characterized in that: The inner wall of the bobbin (1) has a guide groove and a clamping groove (16), and the clamping block (903) is adapted to fit the clamping groove (16).

5. The small medical bone cement filler according to claim 1, characterized in that: The fixed sleeve at the end of the base (4) is provided with a sealing gasket (20), the side wall of the stirring blade (5) is provided with a sealing sleeve, and the sealing sleeve is sleeved on the surface of the screw rod (15).

6. The small medical bone cement filler according to claim 1, characterized in that: The end of the surface of the tube (1) is provided with a hook portion (21) for placing a finger, and the end of the first movable tube (12) is fixedly sleeved with an auxiliary block for placing a thumb.

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