Auxiliary injection device for bone cement and injector assembly

Abstract

The utility model relates to an auxiliary injection device for bone cement and an injector assembly, the auxiliary injection device comprises an assembly pipe, an output pipe, an end cover and a connecting part, the output pipe is coaxially arranged in the assembly pipe, and a plurality of output holes distributed at intervals in the length direction of the output pipe are formed in the output pipe. By arranging the output pipe capable of stretching out and drawing back in the assembling pipe, when the hole-shaped skeleton needs to be filled, the extending distance of the output pipe on the assembling pipe can be adjusted according to the depth of the position to be filled of the skeleton, bone cement can enter the position to be filled of the skeleton through the output hole, and the end cover is assembled or disassembled according to the actual requirement of an operation; meanwhile, when gaps of the bone need to be filled, the output pipe can be completely retracted into the assembly pipe to block the output hole, and the end cover is assembled and fixed to the end of the output pipe, so that when the device is filled with the bone cement, the bone cement cannot seep from the output hole; therefore, the precision degree of filling the bone gap is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an injection aid device and syringe assembly for bone cement. Background Technology

[0002] Bone cement, as an important auxiliary material, is mainly used to fix prostheses and fill bone defects. Its rapid polymerization properties help surgeons quickly stabilize fracture sites during surgery, reducing operation time and blood loss.

[0003] During bone cement filling, a syringe is usually used to push the bone cement to the predetermined location. When facing different surgical situations, such as when existing syringes are used to deal with gaps and holes in bone structures, it is necessary to ensure accurate filling while maximizing the pushing efficiency according to the actual surgical needs.

[0004] However, existing syringes are less efficient at filling pores because they encounter greater resistance during delivery, requiring more skill from the doctor. Utility Model Content

[0005] This application provides an injection aid device and syringe assembly for bone cement, which can solve the problem that existing syringes and injection aids cannot achieve efficient and precise filling according to the actual surgical needs when pushing and filling bone cement into the bone.

[0006] The technical solution of this application is as follows: A bone cement injection auxiliary device, comprising:

[0007] Assembly pipe;

[0008] The output tube is coaxially disposed inside the assembly tube and can extend and retract along the length of the assembly tube. The output tube is provided with a plurality of output holes spaced apart along the length of the output tube.

[0009] End cap, the end cap being detachably mounted to the end of the output tube away from the mounting tube; and

[0010] The other end of the assembly tube is detachably connected to the syringe via the connecting part.

[0011] By adopting the above scheme and setting an output tube that can extend and retract inside the assembly tube, when it is necessary to fill the pore-shaped bone, the distance of the output tube extending from the assembly tube can be adjusted according to the depth of the bone to be filled. Bone cement can enter the bone to be filled through the output hole. The end cap can be assembled or disassembled according to the actual needs of the surgery to adjust the filling rate. At the same time, when it is necessary to fill the gaps in the bone, the output tube can be completely retracted into the assembly tube to block the output hole, and the end cap can be assembled and fixed to the end of the output tube. This ensures that when the device is filling bone cement, the bone cement cannot seep out from the output hole, but can only seep out from the end of the output tube, thereby improving the accuracy of filling the bone gaps.

[0012] In one embodiment of this application, the output tube includes:

[0013] Main pipe;

[0014] A connecting pipe, coaxially fitted to one end of the main body pipe and having the same diameter as the main body pipe; and

[0015] A threaded tube, which is coaxially assembled to the other end of the main tube and has the same diameter as the main tube.

[0016] By adopting the above solution and setting a threaded tube, the entire output tube can be threadedly connected inside the assembly tube, making it more convenient and faster to adjust the extension and retraction distance of the output tube on the assembly tube.

[0017] In one embodiment of this application, the connecting pipe is provided with slots spaced apart along the circumference of the connecting pipe, and the inner wall of the end cap is fitted with elastic blocks spaced apart along the circumference of the end cap, the elastic blocks being adapted to the slots.

[0018] By adopting the above solution, the device can be easily assembled or disassembled by the user under external force by using the interlocking of the elastic block and the slot.

[0019] In one embodiment of this application, a plurality of the output holes are disposed on the main body tube and are spaced apart along the length direction of the main body tube.

[0020] By adopting the above scheme, the number and area of ​​the exposed output holes can be adjusted by adjusting the distance of the main tube recessed inside the assembly tube, thereby allowing the device to adjust the filling rate of bone cement according to the actual surgical needs.

[0021] In one embodiment of this application, the threaded pipe is threaded to the inner wall of the assembly pipe and drives the output pipe to extend and retract along the length of the assembly pipe.

[0022] By adopting the above technical solution, by setting a threaded tube and making it threadedly connected inside the assembly tube, the output tube can be driven to extend and retract inside the assembly tube when rotating, thereby improving the convenience of adjusting the extension and retraction distance of the output tube.

[0023] In one embodiment of this application, the connecting portion includes:

[0024] A connecting cylinder, which is fitted to the outside of the other end of the assembly tube;

[0025] A threaded sleeve is coaxially disposed in the connecting cylinder and communicates with the assembly tube. The threaded sleeve is threadedly connected to the syringe.

[0026] The above technical solution improves the ease of assembling and disassembling the entire device on the syringe by setting a threaded sleeve and using a threaded connection to assemble the assembly tube onto the syringe.

[0027] This application also relates to a syringe assembly, the technical solution of which is as follows: A syringe assembly includes a syringe body and an injection auxiliary device for bone cement, wherein the syringe body is connected to the injection auxiliary device for bone cement.

[0028] In one embodiment of this application, the syringe body includes:

[0029] syringe;

[0030] The connecting end is fitted onto one end of the injection cylinder and communicates with the injection cylinder, while the other end of the connecting end is connected to the bone cement injection auxiliary device.

[0031] In one embodiment of this application, the syringe body further includes:

[0032] A piston rod, one end of which is sealed and fitted inside the syringe and is movable along the length of the syringe, and the other end of which extends to the outside of the syringe.

[0033] In one embodiment of this application, the connecting end is a hollow cylindrical component, and a communicating pipe coaxial with the connecting end is assembled inside the connecting end. The connecting end is threadedly connected to the threaded sleeve, and the communicating pipe is connected to the injection cylinder.

[0034] By adopting the above scheme, a connection end that can be adapted to the thread of the threaded sleeve is set, so that when the device is assembled on the syringe body, the connecting tube can be connected to the assembly tube, so that the bone cement can be injected into the bone through the output tube under the push of the piston rod. At the same time, the threaded connection method also facilitates the assembly and disassembly of the injection auxiliary device.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. By setting up an output tube that can extend and retract inside the assembly tube, and by adjusting the distance of the output tube at the extension point of the assembly tube, the bone cement injection speed can be controlled, while the filling of bone gaps and porous bones can be made more precise.

[0037] 2. By setting a threaded tube coaxially mounted on one end of the output tube, the output tube can be easily extended and retracted inside the assembly tube. This improves the ease of adjusting the position of the output tube and prevents the bone cement from automatically sliding out of the assembly tube due to the resistance between the bone cement and the output tube during the bone cement injection process, thus improving the stability of the output tube when it is set in the assembly tube.

[0038] 3. By equipping the syringe body with an injection auxiliary device, when bone cement needs to be injected into bone gaps or perforated bones according to the actual surgical needs, the syringe body can conveniently, efficiently and accurately inject bone cement into the designated location, thus improving the ease of use of the device. Attached Figure Description

[0039] Figure 1 This is a front view of an injection aid device for bone cement provided in an embodiment of this application;

[0040] Figure 2 This is a front view of an end cap of an injection aid device for bone cement provided in an embodiment of this application;

[0041] Figure 3 This is a front view of the connection part of an injection auxiliary device for bone cement provided in the embodiments of this application;

[0042] Figure 4 This is a plan view of the output pipe of the bone cement injection auxiliary device provided in the embodiments of this application when it is inside the assembly pipe;

[0043] Figure 5 This is a front view of a syringe assembly provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. Assembly tube; 2. Output tube; 21. Main body tube; 211. Output hole; 22. Connecting tube; 221. Slot; 23. Threaded tube; 3. End cap; 31. Elastic locking block; 4. Connecting part; 41. Connecting cylinder; 42. Threaded sleeve; 5. Syringe body; 51. Injection cylinder; 52. Connecting end; 521. Connecting tube; 53. Piston rod. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-5This application provides a further detailed description of an injection aid device and syringe assembly for bone cement.

[0046] Please see Figure 1 This application provides an injection aid for bone cement, comprising: an assembly tube 1, an output tube 2, an end cap 3, and a connecting part 4. The output tube 2 is coaxially disposed inside the assembly tube 1 and can extend and retract along the length of the assembly tube 1. The output tube 2 is provided with a plurality of output holes 211 spaced apart along the length of the output tube 2. The end cap 3 is detachably assembled to one end of the output tube 2 away from the assembly tube 1. The other end of the assembly tube 1 is detachably connected to a syringe through the connecting part 4. By adjusting the position of the output tube 2 on the assembly tube 1, the position and volume of bone cement seeping into the device can be controlled, enabling the device to more accurately and efficiently complete the filling of bone cement in bone gaps or porous bones.

[0047] Please see Figure 1 and Figure 4 The output tube 2 includes a main tube 21, a connecting tube 22, and a threaded tube 23. The connecting tube 22 is coaxially mounted to one end of the main tube 21 and has the same diameter as the main tube 21. The threaded tube 23 is coaxially mounted to the other end of the main tube 21 and has the same diameter as the main tube 21. The main tube 21, the connecting tube 22, and the threaded tube 23 are concentrically connected, so that the main tube 21 can extend and retract inside the assembly tube 1 by means of the rotation of the threaded tube 23. At the same time, the end cap 3 can be easily installed and removed from the connecting tube 22.

[0048] In this embodiment, the main tube 21, the connecting tube 22 and the threaded tube 23 are integrally assembled.

[0049] Please see Figure 1The connecting pipe 22 is provided with slots 221 spaced apart along the circumference of the connecting pipe 22. The inner wall of the end cap 3 is fitted with elastic blocks 31 spaced apart along the circumference of the end cap 3. The elastic blocks 31 are adapted to the slots 221. Multiple output holes 211 are provided on the main body pipe 21 and spaced apart along the length of the main body pipe 21. The threaded pipe 23 is threaded to the inner wall of the assembly pipe 1 and drives the output pipe 2 to extend and retract along the length of the assembly pipe 1, utilizing the slots 221 and elastic blocks. The interlocking between 31 allows the end cap 3 to be easily installed in the connecting tube 22 by squeezing the elastic locking block 31 when it is necessary to assemble the end cap 3. At the same time, when it is necessary to fill the pore-shaped bone with bone cement, the output tube 2 is pulled out, so that the output hole 211 on the outside of the output tube 2 extends out from the inside of the assembly tube 1. When the bone cement is pushed by pressure, it can seep out from the output hole 211 and the end of the output tube 2 when passing through the output tube 2, which improves the filling speed of bone cement when filling the pore-shaped bone.

[0050] In this embodiment, the main tube 21, connecting tube 22, threaded tube 23, and elastic locking block 31 are all medical stainless steel components.

[0051] Please see Figure 3 The connecting part 4 includes a connecting cylinder 41 and a threaded sleeve 42. The connecting cylinder 41 is assembled to the outside of the other end of the assembly tube 1. The threaded sleeve 42 is coaxially disposed in the connecting cylinder 41 and communicates with the assembly tube 1. The threaded sleeve 42 is threadedly connected to the syringe. By adopting the threaded connection method, the injection auxiliary device can be conveniently assembled on the injection auxiliary device, while improving the stability after assembly.

[0052] Please see Figure 5 This utility model also relates to a syringe assembly, the technical solution of which is as follows: A syringe assembly includes: a syringe body 5 and a bone cement injection auxiliary device, wherein the syringe body 5 is connected to the bone cement injection auxiliary device.

[0053] The syringe body 5 includes an injection cylinder 51 and a connecting end 52. One end of the connecting end 52 is fitted onto one end of the injection cylinder 51 and communicates with the injection cylinder 51. The other end of the connecting end 52 is connected to the injection auxiliary device for bone cement. The syringe body 5 also includes a piston rod 53. One end of the piston rod 53 is sealed and fitted inside the injection cylinder 51 and can move along the length of the injection cylinder 51. The other end extends to the outside of the injection cylinder 51. The connecting end 52 is a hollow cylindrical component. A communicating tube 521 coaxial with the connecting end 52 is fitted inside the connecting end 52. The connecting end 52 is threadedly connected to the threaded sleeve 42. The communicating tube 521 communicates with the injection cylinder 51. By providing a syringe body 5 that can be threadedly connected to the threaded sleeve 42, the convenience and stability of connecting the injection auxiliary device to the syringe body 5 are improved.

[0054] In summary, when bone cement needs to be filled into the gaps in the bone, first remove the end cap 3 from the output tube 2, and at the same time rotate the output tube 2. The output tube 2 drives the threaded tube 23 to rotate inside the assembly tube 1. Through the threaded engagement, the main tube 21 is completely inserted into the assembly tube 1. At this time, the output hole 211 set on the main tube 21 is completely inserted into the assembly tube 1, and the bone cement can only seep out from one end of the output tube 2, thus ensuring that the bone cement is accurately and precisely filled into the gaps in the bone.

[0055] When bone cement needs to be filled into the porous bone, the output tube 2 can be rotated and unscrewed from the assembly tube 1 according to the actual surgical requirements. This will expose the output hole 211 on the output tube 2. When the bone cement is pushed out under pressure, it can seep out from the output hole 211 on the side of the output tube 2, which increases the filling speed. At the same time, the end cap 3 can be removed to further control the filling speed, depending on the actual surgical requirements.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection aid for bone cement, used to be mounted on a syringe and to dispense the contents of the syringe, characterized in that, include: Assembly tube (1); Output tube (2), the output tube (2) is coaxially disposed inside the assembly tube (1) and can extend and retract along the length direction of the assembly tube (1). The output tube (2) is provided with a plurality of output holes (211) spaced apart along the length direction of the output tube (2). End cap (3), said end cap (3) being detachably mounted to the end of said output pipe (2) away from the mounting pipe (1); and The other end of the assembly tube (1) is detachably connected to the syringe via the connecting part (4).

2. The injection auxiliary device for bone cement according to claim 1, characterized in that: The output tube (2) also includes: Main tube (21); A connecting pipe (22) is coaxially mounted to one end of the main body pipe (21) and has the same diameter as the main body pipe (21); and A threaded tube (23) is coaxially mounted on the other end of the main tube (21) and has the same diameter as the main tube (21).

3. The injection auxiliary device for bone cement according to claim 2, characterized in that: The connecting pipe (22) is provided with slots (221) spaced apart along the circumference of the connecting pipe (22), and elastic blocks (31) are installed at intervals along the circumference of the end cap (3) on the inner wall of the end cap (3), and the elastic blocks (31) are adapted to the slots (221).

4. The injection auxiliary device for bone cement according to claim 2, characterized in that: Multiple output holes (211) are disposed on the main body tube (21) and are distributed at intervals along the length direction of the main body tube (21).

5. The injection auxiliary device for bone cement according to claim 2, characterized in that: The threaded tube (23) is threaded to the inner wall of the assembly tube (1) and drives the output tube (2) to extend and retract along the length of the assembly tube (1).

6. The injection auxiliary device for bone cement according to claim 5, characterized in that: The connecting part (4) includes: A connecting cylinder (41) is assembled to the outside of the other end of the assembly tube (1); A threaded sleeve (42) is coaxially disposed in the connecting sleeve (41) and communicates with the assembly tube (1). The threaded sleeve (42) is threadedly connected to the syringe.

7. A syringe assembly, characterized in that, include: The syringe body (5) and the injection aid for bone cement as described in any one of claims 1-6, wherein the syringe body (5) is connected to the injection aid for bone cement.

8. A syringe assembly according to claim 7, characterized in that: The syringe body (5) includes: Injector (51); The connecting end (52) is fitted at one end to one end of the injection cylinder (51) and communicates with the injection cylinder (51). The other end of the connecting end (52) is connected to the bone cement injection auxiliary device.

9. A syringe assembly according to claim 8, characterized in that: The syringe body (5) also includes: A piston rod (53) is sealed at one end inside the injection cylinder (51) and can move along the length of the injection cylinder (51), while the other end extends to the outside of the injection cylinder (51).

10. A syringe assembly according to claim 8, characterized in that: The connecting end (52) is a hollow cylindrical component. A connecting tube (521) coaxial with the connecting end (52) is installed inside the connecting end (52). The connecting end (52) is threadedly connected to the threaded sleeve (42). The connecting tube (521) is connected to the injection cylinder (51).

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