Anti-infection joint spacer

Abstract

The invention discloses an anti-infection joint spacer, and belongs to the technical field of joint spacers, the anti-infection joint spacer comprises a spacer head, a pore channel structure and a suction and discharge structure, the lower end of the spacer head is integrally connected with a thighbone far end, and an integrated structure formed by the spacer head and the thighbone far end forms the external shape of the spacer. A first frame cavity and a second frame cavity are formed in the spacer head and the distal femur respectively, the first frame cavity and the second frame cavity are connected in a penetrating mode, a special-shaped reinforcing frame and a spherical reinforcing frame are embedded in the first frame cavity and the second frame cavity respectively, and the upper end of the special-shaped reinforcing frame and the lower end of the spherical reinforcing frame are integrally and fixedly connected. According to the joint spacer, tissue fluid can be fully utilized and can make uniform contact with the head of the spacer, so that the head of the spacer is conveniently and uniformly lubricated, the using smoothness of the spacer is improved, in addition, the strength of the joint spacer can be enhanced through the reinforcing knot frame, and the problem that the joint spacer is prone to breakage due to large bearing in the using process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of joint spacers, and in particular to an anti-infection joint spacer. Background Art

[0002] If infection occurs after artificial joint replacement, it will cause serious complications. Joint infection may be caused by many reasons, such as bacterial contamination during surgery, low immunity of the patient, etc. Traditional treatment methods are often limited in effect and may cause serious damage to joint function. The emergence of joint spacers provides new ideas and methods for the treatment of joint infection. Since the material used to make the spacer is bone mud, which contains antibiotics, the antibiotics can prevent infection in the affected area during the use of the spacer; The existing anti-infection joint spacers still have the following technical problems when used, such as: 1. The existing anti-infection joint spacer will come into contact with tissue fluid during use for lubrication, but the tissue fluid cannot be evenly wrapped around the head of the spacer, which is not conducive to full and uniform lubrication of the tissue fluid; 2. The existing anti-infection joint spacers are not strong enough during use, which may easily lead to the breakage of the spacers, thus easily causing secondary injuries, especially for spacers with heavy loads, such as hip joint spacers; Therefore, an anti-infection joint spacer is needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide an anti-infection joint spacer to solve the problems mentioned in the above background technology that the existing joint spacer cannot fully utilize tissue fluid for lubrication and has insufficient strength.

[0004] To achieve the above object, the present invention provides the following technical solutions: An anti-infection joint placeholder comprises a placeholder head, a channel structure and a suction and discharge structure, wherein the lower end of the placeholder head is integrally connected with the distal end of the femur, and the external shape of the placeholder is formed by the integral structure formed by the placeholder head and the distal end of the femur, and the interior of the placeholder head and the distal end of the femur are respectively provided with a frame cavity one and a frame cavity two, and the frame cavity one and the frame cavity two are through-connected, and a special-shaped reinforcement frame and a spherical reinforcement frame are respectively embedded in the frame cavity one and the frame cavity two, and the upper end of the special-shaped reinforcement frame and the lower end of the spherical reinforcement frame are integrally fixedly connected, a channel structure is provided on the placeholder head for tissue fluid to circulate in the placeholder head, and the channel structure is connected through the suction and discharge structure, and tissue fluid can be sucked into the channel structure through the suction and discharge structure, and the tissue fluid in the channel structure can be discharged, and a spherical component is provided inside the suction and discharge structure.

[0005] Preferably, the special-shaped reinforcement frame is evenly provided with arch structures, and the strength of the support of the special-shaped reinforcement frame is improved through the arch structures.

[0006] Preferably, the channel structure includes a drainage hole, a liquid inlet hole, a liquid inlet bin and a liquid drainage bin, the liquid inlet bin and the liquid drainage bin are arranged inside the head of the placeholder, and the liquid inlet bin and the liquid drainage bin are evenly provided with liquid inlet holes and liquid drainage holes respectively.

[0007] Preferably, the structural shape and size of the liquid inlet bin and the liquid discharge bin are exactly the same, and both the liquid inlet bin and the liquid discharge bin are arc-shaped pipes. A total of 6 liquid inlet bins and liquid discharge bins are provided, and they are distributed at equal angles inside the head of the placeholder. The number of the liquid inlet bin and the number of the liquid discharge bins are 2 and 4 respectively, and the 2 liquid inlet bins are symmetrically arranged about the axis of the placeholder head, and liquid discharge bins are arranged on both sides of each liquid inlet bin.

[0008] Preferably, the spherical component is made of a mixture of calcium sulfate and antibiotics, and the head of the spacer and the distal end of the femur are both made of bone mud. After the antibiotics in the bone mud are consumed to a certain extent, the spherical component releases the antibiotics to ensure the concentration of the antibiotics acting on the affected area.

[0009] Preferably, the suction and discharge structure includes a liquid inlet pipe, a one-way liquid inlet valve, a piston tube, a one-way liquid discharge valve, a piston rod, a spring, a spherical hollow frame, an inner cavity, a liquid discharge pipe and an arc tube, the inner cavity is arranged inside the head of the placeholder, and the inner cavity is provided with a spherical hollow frame, the spherical member is arranged inside the spherical hollow frame, the two long axis ends of the inner cavity are fixedly connected to the piston tube, and the open end of the piston tube is connected to the piston rod, and the two piston rods are coaxially fixedly connected to the spherical A spring is arranged on the outside of the hollow frame and on the outside of each piston rod, and the two ends of the spring are respectively arranged on the outside of the spherical hollow frame and the open end of the piston tube, and each piston tube is provided with a one-way discharge valve and a one-way inlet valve, one end of the discharge pipe and one end of the inlet pipe are respectively connected to the discharge bin and the inlet bin, and the other end of the discharge pipe is connected to the arc tube, and the other ends of the arc tube and the inlet pipe are respectively connected to the one-way discharge valve and the one-way inlet valve.

[0010] Preferably, the inner cavity is elliptical, and the center of the inner cavity coincides with the center of the placeholder head.

[0011] Preferably, the arc tube is a structure with both ends closed, and the two drainage pipes connected to each arc tube are symmetrically arranged about the bisecting line of the arc tube.

[0012] Preferably, the shortest distance between the open end of the piston tube and the one-way liquid inlet valve and the one-way liquid discharge valve provided thereon is greater than the maximum distance between the open end of the piston tube and the end of the piston rod extending into the piston tube.

[0013] Preferably, the arc-shaped tube is a porous structure, which can be connected with the inner cavity, thereby facilitating the tissue fluid to enter the inner cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the anti-infection joint spacer can fully utilize tissue fluid, so that the tissue fluid is evenly in contact with the head of the spacer, thereby facilitating even lubrication of the head of the spacer and improving the smoothness of the use of the spacer. In addition, the strength of the joint spacer can be enhanced by strengthening the frame, reducing the problem of easy breakage due to heavy load during use: 1. After the joint spacer is installed on the patient, when the patient moves the body part through the joint spacer, the spherical hollow frame and the spherical component will vibrate, which will cause the piston rod to move in the piston tube, so that the inlet hole absorbs tissue fluid. After passing through the inlet hole, the tissue fluid enters the inlet tank, and finally enters the piston tube through the inlet pipe, and then is discharged through the arc tube, the drainage pipe, the drainage tank and the drainage hole in turn, so that the tissue fluid can diffuse from a single position to the surroundings, which is conducive to quickly lubricating the head of the spacer and ensuring that the body parts continue to move smoothly; 2. The reinforcement structure composed of the special-shaped reinforcement frame and the spherical reinforcement frame can improve the overall strength of the joint spacer. In particular, the arched structure arranged on the reinforcement structure can further improve the strength of the joint spacer and reduce the possibility of breakage during use, thereby ensuring stable use of the joint spacer by the patient. 3. Since the arc tube has a porous structure, tissue fluid will also enter the inner cavity. The tissue fluid entering the inner cavity will contact the spherical component, which will help the antibiotics in the spherical component to be brought out of the joint spacer along with the tissue fluid, so that they can act on the affected area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of point A; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of point B in the middle; Figure 5 It is a schematic diagram of the connection structure of the special-shaped reinforcement frame and the spherical reinforcement frame of the present invention; Figure 6 It is a schematic diagram of the connection structure between the spherical reinforcement frame and the frame cavity of the present invention; Figure 7 For the present invention Figure 6 The schematic diagram of the enlarged structure of point C in the middle; Figure 8 It is a partial cross-sectional structural schematic diagram of the present invention; Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point D.

[0016] In the figure: 1. head of the placeholder; 2. distal end of the femur; 3. drainage hole; 4. inlet hole; 5. special-shaped reinforcement frame; 6. inlet tank; 7. inlet pipe; 8. one-way inlet valve; 9. piston tube; 10. one-way drainage valve; 11. piston rod; 12. spring; 13. spherical hollow frame; 14. spherical component; 15. inner cavity; 16. spherical reinforcement frame; 17. frame cavity one; 18. drainage pipe; 19. frame cavity two; 20. arc tube; 21. drainage tank. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-Figure 9 , the present invention provides the following technical solutions: Embodiment 1

[0019] In order to solve the problem that the joint spacer is not strong enough and is easy to break and cause secondary injury, the following technical solutions are provided, specifically: An anti-infection joint placeholder includes a placeholder head 1, a channel structure and an suction and discharge structure. The lower end of the placeholder head 1 is integrally connected with the distal end of the femur 2, and the external shape of the placeholder is formed by the integrated structure formed by the placeholder head 1 and the distal end of the femur 2. The interior of the placeholder head 1 and the distal end of the femur 2 are respectively provided with a frame cavity 17 and a frame cavity 2 19, and the frame cavity 17 and the frame cavity 2 19 are through-connected. A special-shaped reinforcement frame 5 and a spherical reinforcement frame 16 are respectively embedded in the frame cavity 17 and the frame cavity 2 19, and the upper end of the special-shaped reinforcement frame 5 and the lower end of the spherical reinforcement frame 16 are integrally fixedly connected. A channel structure is provided on the placeholder head 1 for the circulation of tissue fluid in the placeholder head 1.

[0020] The special-shaped reinforcement frame 5 is evenly provided with an arch structure, and the strength of the support of the special-shaped reinforcement frame 5 is improved through the arch structure. The channel structure includes a drainage hole 3, a liquid inlet hole 4, a liquid inlet bin 6 and a liquid drainage bin 21. The interior of the placeholder head 1 is provided with a liquid inlet bin 6 and a liquid drainage bin 21, and the liquid inlet bin 6 and the liquid drainage bin 21 are respectively evenly provided with liquid inlet holes 4 and liquid drainage holes 3. The structural shape and size of the liquid inlet bin 6 and the liquid drainage bin 21 are exactly the same, and the liquid inlet bin 6 and the liquid drainage bin 21 are both arc-shaped pipes. There are 6 liquid inlet bins 6 and liquid drainage bins 21, and they are distributed at equal angles inside the placeholder head 1. The liquid inlet bin 6 and the drainage bin 21 are arranged in a plurality of arc-shaped pipes. The number of liquid tanks 21 is 2 and 4 respectively, and the 2 liquid inlet tanks 6 are symmetrically arranged about the axis of the placeholder head 1, and a liquid drainage tank 21 is arranged on both sides of each liquid inlet tank 6. The spherical component 14 is made of a mixture of calcium sulfate and antibiotics. By sucking tissue fluid from 2 rows of liquid inlet holes 4 and discharging it from 4 rows of liquid drainage holes 3, the tissue fluid can be easily lubricated evenly for the placeholder head 1, which is beneficial to the smooth use of the placeholder head 1. The placeholder head 1 and the distal end of the femur 2 are both made of bone mud. After the antibiotics in the bone mud are consumed to a certain extent, the spherical component 14 releases the antibiotics to ensure the concentration of the antibiotics acting on the affected area. Embodiment 2

[0021] In order to solve the problem that previous joint spacers are not convenient for tissue fluid to fully lubricate the spacer, the following technical solution is provided. Specifically, the channel structure is connected by a suction and discharge structure, and the tissue fluid can be sucked into the channel structure through the suction and discharge structure, and the tissue fluid in the channel structure can be discharged. A spherical component 14 is arranged inside the suction and discharge structure.

[0022] The suction and discharge structure includes a liquid inlet pipe 7, a one-way liquid inlet valve 8, a piston tube 9, a one-way liquid discharge valve 10, a piston rod 11, a spring 12, a spherical hollow frame 13, an inner cavity 15, a liquid discharge pipe 18 and an arc tube 20. The inner cavity 15 is arranged inside the placeholder head 1, and the inner cavity 15 is provided with a spherical hollow frame 13. The spherical member 14 is arranged inside the spherical hollow frame 13. The two long axis ends of the inner cavity 15 are fixedly connected to the piston tube 9, and the open ends of the piston tube 9 are connected to the piston rod 11. The two piston rods 11 are coaxially fixedly connected to the spherical hollow frame 13. The outer side of the hollow frame 13 and the outer side of each piston rod 11 are provided with a spring 12, and the two ends of the spring 12 are respectively arranged on the outer side of the spherical hollow frame 13 and the open end of the piston tube 9, each piston tube 9 is provided with a one-way discharge valve 10 and a one-way inlet valve 8, one end of the discharge pipe 18 and one end of the inlet pipe 7 are respectively connected to the discharge bin 21 and the inlet bin 6, and the other end of the discharge pipe 18 is connected to the arc tube 20, and the other ends of the arc tube 20 and the inlet pipe 7 are respectively connected to the one-way discharge valve 10 and the one-way inlet valve 8. When the part of the patient's body where the joint spacer is installed moves, the joint spacer will vibrate, which can cause the spherical hollow frame 13 and the spherical component 14 inside it to change position, so that the piston rod 11 can move in the piston tube 9, and the tissue fluid can be sucked into the piston tube 9 through the one-way liquid inlet valve 8 and the one-way liquid discharge valve 10 through the liquid inlet pipe 7, and then the tissue fluid can be discharged through the liquid discharge pipe 18. In addition, during this process, the tissue fluid will also enter the inner cavity 15, so that it can carry the antibiotics in the spherical component 14 to act on the affected area, which can avoid infection. The inner cavity 15 is elliptical, and the center of the inner cavity 15 coincides with the center of the placeholder head 1. The arc tube 20 is a structure with both ends closed, and the two drainage tubes 18 connected to each arc tube 20 are symmetrically arranged about the bisector of the arc tube 20. The shortest distance between the open end of the piston tube 9 and the one-way inlet valve 8 and the one-way drainage valve 10 is greater than the maximum distance between the open end of the piston tube 9 and the end of the piston rod 11 extending into the piston tube 9. The arc tube 20 is a porous structure, which can be connected with the inner cavity 15, thereby facilitating the tissue fluid to enter the inner cavity 15.

[0023] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-infective joint spacer, comprising a spacer head (1), a pore structure and a suction and discharge structure, characterized in that: The lower end of the placeholder head (1) is integrally connected to the distal end of the femur (2), and the external shape of the placeholder is formed by the integral structure formed by the placeholder head (1) and the distal end of the femur (2). The placeholder head (1) and the distal end of the femur (2) are respectively provided with a frame cavity 1 (17) and a frame cavity 2 (19), and the frame cavity 1 (17) and the frame cavity 2 (19) are connected through. The frame cavity 1 (17) and the frame cavity 2 (19) are respectively embedded with a special-shaped reinforcement frame (5) and a spherical reinforcement frame (16), and the upper end of the special-shaped reinforcement frame (5) and the lower end of the spherical reinforcement frame (16) are integrally fixedly connected. The placeholder head (1) is provided with a channel structure for the circulation of tissue fluid in the placeholder head (1), and the channel structure is connected through a suction and discharge structure. Through the suction and discharge structure, tissue fluid can be sucked into the channel structure and the tissue fluid in the channel structure can be discharged. The suction and discharge structure is provided with a spherical component (14).

2. The anti-infective joint spacer according to claim 1, characterized in that: The special-shaped reinforcement frame (5) is evenly provided with arch structures, and the support strength of the special-shaped reinforcement frame (5) is improved through the arch structures.

3. The anti-infective joint spacer according to claim 2, characterized in that: The pore structure comprises a liquid discharge hole (3), a liquid inlet hole (4), a liquid inlet bin (6) and a liquid discharge bin (21); the liquid inlet bin (6) and the liquid discharge bin (21) are arranged inside the placeholder head (1), and the liquid inlet bin (6) and the liquid discharge bin (21) are evenly arranged with liquid inlet holes (4) and liquid discharge holes (3) respectively.

4. The anti-infective joint spacer according to claim 3, characterized in that: The liquid inlet bin (6) and the liquid discharge bin (21) are completely identical in structure, shape and size, and both the liquid inlet bin (6) and the liquid discharge bin (21) are arc-shaped pipes. A total of six liquid inlet bins (6) and liquid discharge bins (21) are provided, and are distributed at equal angles inside the placeholder head (1). Two and four liquid inlet bins (6) and liquid discharge bins (21) are provided respectively, and the two liquid inlet bins (6) are symmetrically arranged about the axis of the placeholder head (1), and liquid discharge bins (21) are provided on both sides of each liquid inlet bin (6).

5. The anti-infective joint spacer according to claim 4, characterized in that: The spherical component (14) is made of a mixture of calcium sulfate and antibiotics, and the spacer head (1) and the distal end of the femur (2) are both made of bone mud. After the antibiotics in the bone mud are consumed to a certain extent, the spherical component (14) releases the antibiotics to ensure the concentration of the antibiotics acting on the affected area.

6. The anti-infective joint spacer according to claim 5, characterized in that: The suction and discharge structure comprises a liquid inlet pipe (7), a one-way liquid inlet valve (8), a piston tube (9), a one-way liquid discharge valve (10), a piston rod (11), a spring (12), a spherical hollow frame (13), an inner cavity (15), a liquid discharge pipe (18) and an arc tube (20); the inner cavity (15) is arranged inside the placeholder head (1), and the inner cavity (15) is provided with a spherical hollow frame (13); the spherical member (14) is arranged inside the spherical hollow frame (13); two long axis ends of the inner cavity (15) are fixedly connected to the piston tube (9), and the open end of the piston tube (9) is connected to the piston rod (11); the two piston rods (11) are coaxially fixedly connected to A spring (12) is arranged on the outside of the spherical hollow frame (13) and on the outside of each piston rod (11), and the two ends of the spring (12) are respectively arranged on the outside of the spherical hollow frame (13) and the open end of the piston tube (9), and each piston tube (9) is provided with a one-way liquid discharge valve (10) and a one-way liquid inlet valve (8), one end of the liquid discharge pipe (18) and one end of the liquid inlet pipe (7) are respectively connected to the liquid discharge bin (21) and the liquid inlet bin (6), and the other end of the liquid discharge pipe (18) is connected to the arc tube (20), and the other ends of the arc tube (20) and the liquid inlet pipe (7) are respectively connected to the one-way liquid discharge valve (10) and the one-way liquid inlet valve (8).

7. The anti-infective joint spacer according to claim 6, characterized in that: The inner cavity (15) is elliptical, and the center of the inner cavity (15) coincides with the center of the placeholder head (1).

8. The anti-infective joint spacer according to claim 7, characterized in that: The arc-shaped tube (20) is a structure with both ends closed, and the two liquid discharge pipes (18) connected to each arc-shaped tube (20) are symmetrically arranged about the bisector of the arc-shaped tube (20).

9. The anti-infective joint spacer according to claim 8, characterized in that: The shortest distance between the open end of the piston tube (9) and the one-way liquid inlet valve (8) and the one-way liquid discharge valve (10) provided thereon is greater than the maximum distance between the open end of the piston tube (9) and the end of the piston rod (11) extending into the piston tube (9).

10. The anti-infective joint spacer according to claim 9, characterized in that: The arc-shaped tube (20) is a porous structure, and can be connected to the inner cavity (15), thereby facilitating the entry of tissue fluid into the inner cavity (15).

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