Intramedullary nail capable of slowly releasing antibiotics

Abstract

The invention discloses an intramedullary nail capable of slowly releasing antibiotics. The intramedullary nail comprises an intramedullary nail body, a medicine cavity is formed in a rod body of the intramedullary nail body, a plurality of microspheres are put into the medicine cavity, the antibiotics are wrapped in the microspheres, and a plurality of releasing micropores are formed in the rod body, corresponding to the medicine cavity, of the intramedullary nail body. According to the intramedullary nail, the microspheres sealed with antibiotics can be put into the intramedullary nail, the antibiotics can be slowly released through the release micropores, the anti-infection effect on osteomyelitis and local infection patients can be achieved, the microspheres do not need to be taken out in a short time, the pain of the patients is relieved, and the intramedullary nail has the advantages of being simple in structure, convenient to use, low in cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sports equipment, in particular to an intramedullary nail capable of slowly releasing antibiotics. BACKGROUND

[0002] The intramedullary nail belongs to the orthopedic internal fixation device in medical devices. The structure has an intramedullary nail rod, a proximal locking screw hole is arranged at the proximal end of the intramedullary nail rod, and a pressure relief plane is arranged on the surface of the intramedullary nail rod. One or more long strip-shaped pressure relief planes are arranged on the surface of the intramedullary nail rod, and the pressure relief planes can extend from the proximal end of the intramedullary nail rod to the distal end of the intramedullary nail rod. A locking screw positioning screw hole and a connecting sleeve positioning groove are arranged at the proximal end of the intramedullary nail rod. However, the existing intramedullary nail cannot carry anti-infective drugs, and cannot play an anti-infective role for patients with osteomyelitis and local infection. Even if infection occurs, the intramedullary nail needs to be removed, and the internal fixation function cannot be played. SUMMARY

[0003] The purpose of the present application is to provide an intramedullary nail capable of slowly releasing antibiotics to solve the above problems.

[0004] To solve the above technical problems, the present application adopts the following technical scheme:

[0005] The present application provides an intramedullary nail capable of slowly releasing antibiotics, which comprises an intramedullary nail body, a drug cavity is arranged in the rod body of the intramedullary nail body, a plurality of microspheres are arranged in the drug cavity, the microspheres are wrapped with antibiotics, and a plurality of release micro-holes are arranged on the rod body of the intramedullary nail body corresponding to the drug cavity.

[0006] Further, a plurality of locking holes are arranged at the top end and the bottom end of the intramedullary nail body.

[0007] Further, the microspheres are silica spheres.

[0008] Further, the material of the intramedullary nail body is titanium alloy.

[0009] Further, the intramedullary nail body comprises an upper rod body and a lower rod body, the upper rod body and the lower rod body are hollow rods, a cavity rod and a plugging rod are arranged between the upper rod body and the lower rod body, the drug cavity is arranged at the top of the cavity rod, the release micro-holes are arranged on the outer wall of the cavity rod and are in communication with the drug cavity, the bottom of the cavity rod is connected to the top surface of the lower rod body, the top of the plugging rod is connected to the bottom surface of the upper rod body, and the bottom of the plugging rod is connected to the top of the cavity rod.

[0010] Further, the top of the cavity rod is connected with a mounting pipe, the inner diameter of the mounting pipe is larger than the diameter of the top opening of the medicine cavity, an outer thread is formed on the outer wall of the mounting pipe, a threaded groove is formed in the bottom of the plugging rod, and the mounting pipe is screwed into the threaded groove through the outer thread on the outer wall.

[0011] Further, the bottom of the threaded groove is connected with a pressing rod, the diameter of the pressing rod is smaller than the inner diameter of the mounting pipe, and the length of the pressing rod is greater than the length of the mounting pipe.

[0012] Further, the top of the mounting pipe is connected with a ring-shaped gasket I, the bottom of the threaded groove is formed with a sealing groove I corresponding to the ring-shaped gasket I, and the thickness of the ring-shaped gasket I is greater than the depth of the sealing groove I.

[0013] Further, the top surface of the cavity rod outside the mounting pipe is connected with a ring-shaped gasket II, the bottom of the plugging rod is formed with a sealing groove II corresponding to the ring-shaped gasket II, and the thickness of the ring-shaped gasket II is greater than the depth of the sealing groove II.

[0014] Compared with the prior art, the beneficial technical effects of the present application are:

[0015] The present application can release the microspheres containing antibiotics into the intramedullary nail, so that the antibiotics can be slowly released through the release micro-holes, and can play an anti-infection role on patients with osteomyelitis and local infection, and do not need to be taken out in a short time, thereby reducing the pain of patients, and having the advantages of simple structure, convenient use, low cost and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the description of the drawings.

[0017] Figure 1 The structure diagram of the intramedullary nail capable of slowly releasing antibiotics according to the present application is shown in the figure;

[0018] Figure 2 The front view of the release micro-holes is shown in the figure;

[0019] Figure 3 The internal section view of the medicine cavity is shown in the figure;

[0020] Figure 4 The Figure 3 The enlarged view of A in the figure;

[0021] Figure 5 The sectional view of the intramedullary nail body is shown in the figure;

[0022] Explanation of reference numerals in the attached diagram: 1. Intramedullary nail body; 101. Upper rod; 102. Lower rod; 103. Cavity rod; 104. Sealing rod; 2. Medication cavity; 3. Microsphere; 4. Release micropore; 5. Locking hole; 6. Installation tube; 7. External thread; 8. Threaded groove; 9. Pressure rod; 10. Annular gasket one; 11. Sealing groove one; 12. Annular gasket two; 13. Sealing groove two. Detailed Implementation

[0023] like Figure 1 As shown, an intramedullary nail capable of slowly releasing antibiotics includes an intramedullary nail body 1, which is made of titanium alloy.

[0024] The top and bottom ends of the intramedullary nail body 1 are provided with a number of locking holes 5, through which locking nails are installed.

[0025] like Figures 2-5 As shown, the intramedullary nail body 1 has a drug cavity 2 inside the shaft, and a number of microspheres 3 are placed inside the drug cavity 2. The microspheres 3 are silica spheres.

[0026] The microspheres 3 contain antibiotics, and the intramedullary nail body 1 corresponding to the drug cavity 2 has several release micropores 4, through which the antibiotics can be slowly released.

[0027] The intramedullary nail body 1 includes an upper rod 101 and a lower rod 102, both of which are hollow rods. A cavity rod 103 and a sealing rod 104 are provided between the upper rod 101 and the lower rod 102. The medication chamber 2 is opened at the top of the cavity rod 103. The release micro-hole 4 is opened on the outer wall of the cavity rod 103 and communicates with the medication chamber 2. The bottom of the cavity rod 103 is connected to the top surface of the lower rod 102. The top of the sealing rod 104 is connected to the bottom surface of the upper rod 101, and the bottom of the sealing rod 104 is connected to the top of the cavity rod 103.

[0028] The top of the cavity rod 103 is connected to an installation tube 6. The inner diameter of the installation tube 6 is larger than the diameter of the opening at the top of the medicine cavity 2. An external thread 7 is provided on the outer wall of the installation tube 6. A threaded groove 8 is provided at the bottom of the sealing rod 104. The installation tube 6 is threadedly connected to the threaded groove 8 through the external thread 7 on the outer wall.

[0029] A pressure rod 9 is connected to the bottom of the threaded groove 8. The diameter of the pressure rod 9 is smaller than the inner diameter of the mounting tube 6, and the length of the pressure rod 9 is greater than the length of the mounting tube 6. The microsphere 3 is pressed down by the pressure rod 9.

[0030] like Figure 4As shown, an annular gasket 10 is connected to the top of the mounting tube 6, and a sealing groove 11 corresponding to the annular gasket 10 is formed at the bottom of the threaded groove 8. The thickness of the annular gasket 10 is greater than the depth of the sealing groove 11. The annular gasket 10 serves a sealing function.

[0031] like Figure 4 As shown, an annular gasket 2 12 is connected to the top surface of the cavity rod 103 outside the mounting tube 6. A sealing groove 2 13 corresponding to the annular gasket 2 12 is formed at the bottom of the sealing rod 104. The thickness of the annular gasket 2 12 is greater than the depth of the sealing groove 2 13. The annular gasket 2 12 provides a sealing effect and forms a double seal with the annular gasket 10.

[0032] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An intramedullary nail capable of slowly releasing antibiotics, characterized in that: The device includes an intramedullary nail body (1), with a drug cavity (2) inside the shaft of the intramedullary nail body (1). Several microspheres (3) are placed inside the drug cavity (2), and the microspheres (3) are filled with antibiotics. Several release micropores (4) are opened on the shaft of the intramedullary nail body (1) corresponding to the drug cavity (2).

2. The intramedullary nail with slow-release antibiotics according to claim 1, characterized in that: The top and bottom ends of the intramedullary nail body (1) are provided with several locking holes (5).

3. The intramedullary nail with slow-release antibiotics according to claim 1, characterized in that: The microspheres (3) are silica spheres.

4. The intramedullary nail with slow-release antibiotics according to claim 1, characterized in that: The material of the intramedullary nail body (1) is titanium alloy.

5. The intramedullary nail with slow-release antibiotics according to claim 1, characterized in that: The intramedullary nail body (1) includes an upper rod (101) and a lower rod (102). Both the upper rod (101) and the lower rod (102) are hollow rods. A cavity rod (103) and a sealing rod (104) are provided between the upper rod (101) and the lower rod (102). The drug cavity (2) is opened at the top of the cavity rod (103). The release microhole (4) is opened on the outer wall of the cavity rod (103) and communicates with the drug cavity (2). The bottom of the cavity rod (103) is connected to the top surface of the lower rod (102). The top of the sealing rod (104) is connected to the bottom surface of the upper rod (101). The bottom of the sealing rod (104) is connected to the top of the cavity rod (103).

6. The intramedullary nail with slow-release antibiotics according to claim 5, characterized in that: The top of the cavity rod (103) is connected to an installation tube (6). The inner diameter of the installation tube (6) is larger than the diameter of the opening at the top of the medicine cavity (2). An external thread (7) is provided on the outer wall of the installation tube (6). A threaded groove (8) is provided at the bottom of the sealing rod (104). The installation tube (6) is threaded into the threaded groove (8) through the external thread (7) on the outer wall.

7. The intramedullary nail with slow-release antibiotics according to claim 6, characterized in that: The bottom of the threaded groove (8) is connected to a pressure rod (9). The diameter of the pressure rod (9) is smaller than the inner diameter of the mounting tube (6), and the length of the pressure rod (9) is greater than the length of the mounting tube (6).

8. The intramedullary nail with slow-release antibiotics according to claim 6, characterized in that: The top of the mounting tube (6) is connected to an annular gasket (10), and the bottom of the threaded groove (8) is provided with a sealing groove (11) corresponding to the annular gasket (10). The thickness of the annular gasket (10) is greater than the depth of the sealing groove (11).

9. The intramedullary nail with slow-release antibiotics according to claim 6, characterized in that: An annular gasket 2 (12) is connected to the top surface of the cavity rod (103) outside the mounting tube (6). A sealing groove 2 (13) corresponding to the annular gasket 2 (12) is opened at the bottom of the sealing rod (104). The thickness of the annular gasket 2 (12) is greater than the depth of the sealing groove 2 (13).

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