Bone cement hollow nail assembly

Abstract

The utility model discloses a bone cement cannulated screw assembly which comprises a cannulated screw and an injector, the cannulated screw comprises a screw cap and a screw rod constructed to be of a hollow structure, the screw cap and the screw rod are integrally formed, an injection hole is formed in the screw cap, the injection hole is communicated with the hollow structure of the screw rod, threads are arranged on the screw rod, and a plurality of outflow holes are formed in the side face of the screw rod; the injector comprises a partition plate and an injection cylinder, the injection cylinder is detachably connected with the hollow nail, the hollow nail is screwed into the fracture position after the injection cylinder is connected with the hollow nail, an insertion groove is formed in the side wall of the injection cylinder, the partition plate slides in the insertion groove, and after the partition plate slides in the insertion groove in the first direction, the injection cylinder is partitioned to form a stirring groove. The bone cement stirring device has the function of rotating the hollow nail, can stir bone cement in the separated stirring grooves, can directly inject the bone cement into a fracture position, prolongs the solidification time of the bone cement, and improves the operation effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a bone cement hollow nail assembly. Background Art

[0002] Orthopedic problems such as fractures and osteoporosis are common clinical challenges. Traditional fracture fixation methods mainly rely on metal plates and screws, but these methods have some limitations, such as large trauma, long operation time, and increased risk of infection. In order to overcome these problems, bone cement hollow nail technology came into being.

[0003] Bone cement hollow nail is a composite material composed of hollow nail and bone cement. The principle is to inject bone cement into the hollow nail and insert it into the fracture site or osteoporosis area. Bone cement will form a high-strength bone reinforcement area during the curing process, increasing the stability and strength of the fracture or osteoporosis area. However, in the prior art, bone cement is stirred by a bone cement stirrer during the operation and then transferred to a bone cement syringe, which will cause the bone cement to solidify quickly and is not conducive to flowing in the inner hole of the hollow nail. Secondly, the secondary transfer causes a waste of bone cement. The hollow nail needs to be equipped with an additional external screw-in device, and the operation is cumbersome. Therefore, how to improve the efficiency of the operation is an urgent problem to be solved. Utility Model Content

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a bone cement hollow nail assembly, which solves the problems in the prior art that powder easily enters the syringe and the fluidity of bone cement is uneven.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] According to one aspect of the present application, a bone cement hollow nail assembly is disclosed, comprising:

[0007] A hollow nail, wherein the hollow nail comprises a nail cap and a nail rod constructed as a hollow structure, wherein the nail cap and the nail rod are formed integrally, an injection hole is provided on the nail cap, and the injection hole is communicated with the hollow structure of the nail rod, the nail rod is provided with a thread, and a plurality of outflow holes are provided on the side of the nail rod;

[0008] A syringe, the syringe comprising a partition and a syringe barrel, the syringe barrel is detachably connected to the hollow nail, the syringe barrel is screwed into the fracture after being connected to the hollow nail, a slot is provided on the side wall of the syringe barrel, the partition slides in the slot, and after the partition slides in the slot along a first direction, the syringe barrel is separated from the stirring tank. Furthermore, the slot has a notch opening on the outside of the first side wall of the syringe, the bottom of the slot protrudes outward from the second side wall, and the slot is connected to the injection channel of the syringe.

[0009] In an implementable solution, a plurality of the outflow holes are staggeredly arranged on the side wall of the nail rod along the axial direction of the nail rod.

[0010] In an implementable solution, the nail rod includes a screw-in portion and a smooth portion which are connected in sequence, the thread is arranged on the screw-in portion, and the smooth portion is arranged between the screw-in portion and the nail cap.

[0011] In an operative solution, the injection cylinder is detachably connected to the injection hole via a connecting rod.

[0012] In an implementable solution, the cross-section of the connecting rod is a hexagonal structure.

[0013] In an implementable solution, the slot is a rectangular structure or a circular structure.

[0014] Furthermore, the crest and bottom of the thread are transitioned by a fillet.

[0015] In an implementable solution, the hollow nail adopts a hollow structure of titanium alloy.

[0016] The bone cement hollow nail assembly of the utility model comprises a hollow nail and a syringe, wherein the hollow nail comprises a nail cap and a nail rod constructed as a hollow structure, wherein the nail cap is formed integrally with the nail rod, an injection hole is provided on the nail cap, and the injection hole is communicated with the hollow structure of the nail rod, the nail rod is provided with a thread, and a plurality of outflow holes are provided on the side of the nail rod; the syringe comprises a partition and a syringe, wherein the syringe is detachably connected to the hollow nail, and the syringe is screwed into the fracture after being connected with the hollow nail, and a slot is provided on the side wall of the syringe, wherein the partition slides in the slot, and after the partition slides in the slot along a first direction, the syringe is separated from the stirring tank. The utility model has the function of rotating the hollow nail, and can stir the bone cement in the separated stirring tank, and can also directly inject the bone cement into the fracture, thereby prolonging the solidification time of the bone cement and improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 This is a structural schematic diagram of a bone cement hollow nail assembly described in an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional view of

[0020] Figure 3 This is another structural schematic diagram of the bone cement hollow nail assembly described in the embodiment of the utility model

[0021] Figure 4 yes Figure 3 A cross-sectional view of

[0022] Figure 5 It is a schematic diagram of the structure of the syringe described in the embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the stirring rod described in the embodiment of the utility model;

[0024] In the figure, 1-hollow nail, 11-nail cap, 12-nail rod, 121-screw-in part, 122-smooth part, 13-outflow hole, 2-syringe, 21-slot, 211-notch, 212-bottom of groove, 22-connecting rod, 23-piston, 24-syringe barrel, 25-partition, 26-stirring tank, 31-cover body, 32-rod body. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In order to solve the problems existing in the prior art, the utility model discloses a bone cement hollow nail assembly. Figures 1 to 6 As shown, the bone cement hollow nail assembly includes a hollow nail 1 and a syringe 2. The hollow nail 1 includes a nail cap 11 and a nail rod 12 constructed as a hollow structure. The nail cap 11 and the nail rod 12 are formed integrally. An injection hole is provided on the nail cap 11. The injection hole is connected to the hollow structure of the nail rod 12. The nail rod 12 is provided with a thread, and a plurality of outflow holes 13 are provided on the side of the nail rod 12.

[0027] The syringe 2 includes a partition 25 and a syringe 24. The syringe 24 is detachably connected to the hollow nail 1. After the syringe 2 is connected to the hollow nail 1, the hollow nail 1 is screwed into the fracture. A slot 21 is provided on the side wall of the syringe 24. The partition 25 slides in the slot 21. After the partition 25 slides in the slot 21 along the first direction, the syringe 24 is separated from the stirring tank 26. Specifically, during the operation, the target mixture needs to be stirred first. In this example, after the partition 25 slides along the first direction, the partition 25 closes the hollow aperture of the syringe 24, thereby isolating the syringe 24 and blocking the piston 23 from pushing and injecting into the hollow nail 1, thereby preventing the powder from being injected into the hollow nail 1. In addition, the piston 23 can stir the target mixture in the stirring tank 26. Among them, the target mixture can be a mixture of a drug and water for blocking the fracture in surgery, for example, it can be a bone cement mixed with a polymethyl methacrylate (PMMA) matrix and a bone enhancer. After the target mixture is stirred in the slot 21, bone cement is obtained. The syringe 2 is installed with the hollow nail 1 that is initially fixed to the fracture. The syringe 2 pushes the bone cement into the injection hole on the hollow nail 1 through the piston 23, and then injects the bone cement into the hollow nail 1, and then flows out from the outflow hole 13, so as to achieve the reinforced fixation of the hollow nail 1 and the bone. It can be understood that the utility model has the function of rotating the hollow nail, stirring the bone cement in the separated stirring tank, and directly injecting the bone cement into the fracture, prolonging the setting time of the bone cement and improving the surgical effect. Further, in the present embodiment, the bone cement hollow nail is designed as a combination of the hollow nail 1 and the syringe 2, and the combination is used. The hollow nail 1 is directly screwed in by the syringe 2, which can reduce the number of assembly steps and instruments during the operation, simplify the surgical process, and improve the continuity of the operation.

[0028] In one example, an outflow hole 13 is also provided at one end of the nail rod 12 away from the nail cap 11. In one example, the piston 23 includes an injection rod, a push head and a handle, wherein the bone cement is in the syringe, and the injection rod drives the push head to push the bone cement into the injection hole, and the handle is convenient for medical staff to hold. Preferably, a plurality of protrusions are provided on the handle to increase the roughness of the handle, increase the friction between the medical staff's holding hand and the handle, prevent the hand from slipping, and improve the stability during the injection process. Furthermore, in another example, scale lines are also provided on the injection tube to facilitate medical staff to observe the dosage of the bone cement pushed in, which helps to ensure the correct amount of bone cement and reduce the risk of overdose or underdose.

[0029] Further, the slot 211 of the slot 21 is provided on the outside of the first side wall of the syringe 2, the slot bottom 212 of the slot 21 protrudes outward from the second side wall, and the slot 21 is connected to the hollow aperture of the syringe barrel of the syringe 2. Specifically, the slot 21 includes the slot 211, the first slot wall, the second slot wall and the slot bottom 212, wherein one end of the first slot wall is connected to the first side wall, and the other end is connected to the slot 211 after extending in a direction away from the first side wall, and the second slot wall is connected to the second side wall, and the other end is connected to the slot bottom 212 in a direction away from the second side wall. In one example, the first side wall and the second side wall are symmetrically arranged. By setting the slot 21, the sliding guide of the partition 25 can be realized, which is convenient for the operation of the partition. In one example, the partition 25 includes a cover body 31 and a rod body 32, and when the partition 25 is tightly plugged in the slot 21, the cover body 31 is covered on the outside of the slot 211. It is understandable that by configuring the corresponding partition 25 for the slot 21, the slot 21 and the partition 25 can be used in a single combination, and when not in use, the slot 21 can be sealed, thereby reducing the risk of infection during surgery.

[0030] In an operative solution, a plurality of outflow holes 13 are staggered on the side wall of the nail rod 12 along the axial direction of the nail rod 12. It is understandable that the staggered arrangement of the outflow holes 13 can make it possible to have outflow holes 13 arranged in each direction of the nail rod 12, so that bone cement can flow out when the hollow nail 1 is placed in any direction during surgery, which facilitates the rapid positioning of the hollow nail 1 during surgery.

[0031] In an implementable solution, the nail rod 12 includes a screw-in portion 121 and a smooth portion 122 which are connected in sequence, the thread is provided on the screw-in portion 121 , and the smooth portion 122 is provided between the screw-in portion 121 and the nail cap 11 .

[0032] In an operative solution, the injection barrel 2 is detachably connected to the injection hole via a connecting rod 22. Specifically, the cross section of the connecting rod 22 may be a hexagonal structure based on the hexagonal injection hole on the nail cap 11, or a circular structure based on the circular injection hole on the nail cap 11. The connecting rod 22 and the injection hole on the nail cap 11 only need to match, and the cross-sectional shapes of the injection hole and the connecting rod 22 are not specifically limited here.

[0033] In an implementable solution, the slot 21 is a rectangular structure or a circular structure.

[0034] Furthermore, the crest and the bottom of the thread are transitioned by a fillet.

[0035] In an implementable solution, the hollow nail 1 adopts a hollow structure of titanium alloy.

[0036] The utility model discloses a bone cement hollow nail 1 assembly, comprising a hollow nail 1 and a syringe 2. The hollow nail 1 comprises a nail cap 11 and a nail rod 12 which is constructed as a hollow structure. The nail cap 11 and the nail rod 12 are formed as one body. An injection hole is provided on the nail cap 11, and the injection hole is communicated with the hollow structure of the nail rod 12. The nail rod 12 is provided with a thread, and a plurality of outflow holes 13 are provided on the side of the nail rod 12. The syringe 2 comprises a partition 25 and an injection barrel 24. The injection barrel 24 is detachably connected to the hollow nail 1. After the injection barrel 24 is connected to the hollow nail 1, the hollow nail 1 is screwed into the fracture site. A slot 21 is provided on the side wall of the injection barrel 24. The partition 25 slides in the slot 21. After the partition 25 slides in the slot 21 along the first direction, the injection barrel 24 is separated from the stirring tank 26. The utility model has the function of rotating the hollow nail, can stir the bone cement in the separated stirring tank, and can directly inject the bone cement into the fracture site, thereby prolonging the coagulation time of the bone cement and improving the operation effect.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A bone cement hollow screw assembly, characterized in that: include: A hollow nail (1), the hollow nail (1) comprising a nail cap (11) and a nail rod (12) having a hollow structure, the nail cap (11) and the nail rod (12) being integrally formed, an injection hole being provided on the nail cap (11), the injection hole being communicated with the hollow structure of the nail rod (12), the nail rod (12) being provided with a thread, and a plurality of outflow holes (13) being provided on a side surface of the nail rod (12); A syringe (2), the syringe (2) comprising a partition (25) and a syringe barrel (24), the syringe barrel (24) being detachably connected to the hollow nail (1), the syringe barrel (24) being able to screw the hollow nail (1) into the fracture site after being connected to the hollow nail (1), a slot (21) being provided on the side wall of the syringe barrel (24), the partition (25) sliding in the slot (21), and after the partition (25) sliding in the slot (21) along a first direction, the syringe barrel (24) is separated from the stirring tank (26).

2. The bone cement hollow screw assembly according to claim 1, characterized in that: The slot (211) of the slot (21) is opened on the outside of the first side wall of the syringe (2), the slot bottom (212) of the slot (21) protrudes outward from the second side wall, and the slot (21) is connected to the aperture of the injection barrel (24).

3. The bone cement hollow nail assembly according to claim 1, characterized in that: The plurality of outflow holes (13) are arranged alternately on the side wall of the nail rod (12) along the axial direction of the nail rod (12).

4. The bone cement hollow nail assembly according to claim 3, characterized in that: The nail rod (12) comprises a screw-in portion (121) and a smooth portion (122) which are connected in sequence, the thread is arranged on the screw-in portion (121), and the smooth portion (122) is arranged between the screw-in portion (121) and the nail cap (11).

5. The bone cement hollow screw assembly according to claim 1, characterized in that: The injection cylinder (24) is detachably connected to the injection hole via a connecting rod (22).

6. The bone cement hollow screw assembly according to claim 5, characterized in that: The cross section of the connecting rod (22) is a hexagonal structure.

7. The bone cement hollow screw assembly according to claim 2, characterized in that: The slot (21) is a rectangular structure or a circular structure.

8. The bone cement hollow screw assembly according to claim 4, characterized in that: The crest and bottom of the thread are transitioned by a fillet.

9. The bone cement hollow nail assembly according to claim 1, characterized in that: The hollow nail (1) adopts a hollow structure of titanium alloy.

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