Stable multifunctional intramedullary nail system

Abstract

The invention discloses a stable multifunctional intramedullary nail system, and relates to the technical field of medical instruments. Comprising an intramedullary nail body, the intramedullary nail body comprises a head supporting section, a tail supporting section and a supporting subsection, the head supporting section and the tail supporting section are each provided with a stabilizing screw, a channel is formed in the supporting subsection, a pressing mechanism is arranged in the channel, the pressing mechanism comprises a fixing piece fixedly connected with the supporting subsection, and the fixing piece is hinged to a pressing piece. The pressing mechanism further comprises a conical head for opening the pressing piece, the top and the bottom of the conical head are connected with a first pull rope and a second pull rope respectively, the head supporting section is connected with a moving part, the moving part is provided with a sleeve connector, and the sleeve connector is connected with the conical head. A pull rod connected with the first pull rope of the topmost pressing mechanism is arranged at the bottom of the moving part. The stable multifunctional intramedullary nail system has the advantages of being good in fixing effect and bone protection effect, the overall length can be controlled, and the intramedullary nail system is suitable for bones of different lengths.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a stable multifunctional intramedullary nail system. Background Art

[0002] Intramedullary nails are orthopedic internal fixation devices among medical devices. The structure has an intramedullary nail rod, a proximal locking screw hole is provided at the proximal end of the intramedullary nail rod, and a decompression plane is provided on the surface of the intramedullary nail rod. There are more than one long strip-shaped decompression planes on the surface of the intramedullary nail rod, and the decompression plane can extend from the proximal end of the intramedullary nail rod to the distal end of the intramedullary nail rod. The proximal end of the intramedullary nail rod is provided with a locking screw positioning screw hole and a connecting sleeve positioning groove. It has the advantages of controlling the axial force line of the fracture site, preventing fracture rotation deformity, reducing the risk of fracture of the implant, and promoting fracture healing.

[0003] In the prior art, the intramedullary nail is an integrated rigid straight rod design, and the fixation of the intramedullary nail can only be achieved by screwing the head and tail of the intramedullary nail. In order to avoid displacement during bone healing, the fixation of the intramedullary nail needs to be strengthened, which requires more screws to be driven in and more screw holes to be drilled in the bone. This method of enhanced fixation is very destructive to the bone, especially for patients with osteoporosis, it is difficult to enhance fixation by this method.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is that intramedullary nails rely on screws to enhance fixation, which causes great damage to bones. The purpose is to provide a stable multifunctional intramedullary nail system that adopts corresponding technical solutions, has good fixation effect, good bone protection effect, controllable overall length, suitable for bones of different lengths, and diverse functions.

[0006] The present invention is achieved through the following technical solutions:

[0007] A stable multifunctional intramedullary nail system comprises an intramedullary nail body, wherein the intramedullary nail body comprises a head support section and a tail support section, wherein a plurality of support sections are arranged between the head support section and the tail support section, and the head support section and the tail support section are both provided with a stabilizing screw fixedly connected to the bone.

[0008] The support segment is provided with a channel, the channel is provided with a clamping mechanism, the clamping mechanism comprises a fixing member fixedly connected to the support segment, the fixing member is rotatably connected with a plurality of uniformly distributed clamping sheets, the support segment is provided with an opening aligned with the clamping sheet and connected with the channel, the opening is provided with a flexible sheet abutted by the clamping sheet, the clamping mechanism also comprises a cone head for holding open the clamping sheet, the top and bottom of the cone head are respectively connected with a drawstring 1 and a drawstring 2, the drawstring 1 of the cone head is connected with a drawstring 2 of another adjacent cone head,

[0009] The internal thread of the head support section is connected with a moving part, a sleeve joint is arranged on the side of the moving part facing the outlet, and a pull rod connected with the pull rope of the clamping mechanism at the top is arranged at the bottom of the moving part.

[0010] In the above technical scheme, the stable multifunctional intramedullary nail system is composed of an intramedullary nail body, and the intramedullary nail body is composed of a head support section, a tail support section and multiple support segments. The overall length of the stable multifunctional intramedullary nail system is controlled by controlling the number of support segments. Therefore, the stable multifunctional intramedullary nail system can be adjusted for different bone lengths, and is flexible to use and has a wide range of applications. After the stable multifunctional intramedullary nail system is installed into the bone, the moving part is rotated to move the moving part upward, the pull rope one and the pull rope two move upward, and the cone head is pulled upward. The upward movement of the cone head causes the compression plate to open, and the compression plate opens the flexible plate to press against the bone, thereby fixing the support segment. The head support section and the tail support section are fixed with stable screws. This makes the stable multifunctional intramedullary nail system have a better fixing effect and is not easy to loosen.

[0011] Furthermore, in the present invention, the contact surface between the compression sheet and the flexible sheet is an arched arc surface.

[0012] Furthermore, in the present invention, the contact surface between the pressing piece and the cone head is a concave arc surface 2, and the contact surface between the cone head and the arc surface 2 is a spherical surface.

[0013] Furthermore, in the present invention, four of the above-mentioned pressing sheets are provided.

[0014] Furthermore, in the present invention, a mounting groove is provided on the bottom surface of the moving part, a rotating disk is provided in the mounting groove, and the pull rod passes through the mounting groove and is connected to the rotating disk.

[0015] Furthermore, in the present invention, the pull rod is provided with a through slot, and an anti-rotation plate fixedly connected to the head supporting section is inserted into the through slot.

[0016] Furthermore, in the present invention, the first pull rope is provided with a threaded head, and the second pull rope is provided with a threaded sleeve threadably connected to the threaded head.

[0017] Furthermore, in the present invention, the above-mentioned pull rope 1 and the above-mentioned pull rope 2 are both configured as braided metal wires.

[0018] Furthermore, in the present invention, the tail support segment is threadedly connected to the support segment, the head support segment is threadedly connected to the support segment, and the support segment is threadedly connected to the support segment.

[0019] Furthermore, in the present invention, the flexible sheet is configured as a silicone sheet that has been sterilized.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. The overall length is adjustable: The stable multifunctional intramedullary nail system is composed of an intramedullary nail body, which is composed of a main support section, a tail support section and multiple support segments. The overall length of the stable multifunctional intramedullary nail system can be controlled by controlling the number of support segments. Therefore, the stable multifunctional intramedullary nail system can be adjusted for different bone lengths, is flexible to use, and has a wide range of applications.

[0022] 2. Stable installation: After the stable multifunctional intramedullary nail system is installed in the bone, the moving part is rotated to move upward, the pull rope 1 and the pull rope 2 move upward, and the cone head is pulled upward. The cone head moves upward to open the compression plate, and the compression plate opens the flexible plate to press against the bone, which plays a role in fixing the support segment. The head support segment and the tail support segment are fixed with stable screws. The stable multifunctional intramedullary nail system has a better fixation effect and is not easy to loosen. In addition, this fixation method does not require additional drilling on the bone, has a good protective effect on the bone, and is suitable for patients with osteoporosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 A schematic diagram of a stable multifunctional intramedullary nail system of the present invention;

[0025] Figure 2 It is an internal schematic diagram of the support segment and the connection of the support segment of the present invention;

[0026] Figure 3 is an internal schematic diagram of the head support section of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection between the threaded head and the threaded sleeve of the present invention.

[0028] Markings and corresponding parts names in the accompanying drawings: 1-head support section, 2-tail support section, 3-support segment, 301-channel, 302-opening, 303-flexible sheet, 4-pressing mechanism, 401-fixing part, 402-pressing sheet, 4021-arc surface one, 4022-arc surface two, 403-conical head, 4031-pull rope one, 4032-pull rope two, 4033-threaded head, 4034-threaded sleeve, 5-moving part, 501-sleeve joint, 502-pull rod, 5021-through groove, 503-installing groove, 504-rotating disk, 505-anti-rotation plate, 6-stabilizing screw. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] Example

[0032] Combination Figures 1 to 4 As shown, the stable multifunctional intramedullary nail system of the present invention is shown, and the specific structure is described as follows.

[0033] In some implementations of this embodiment, Figure 1As shown, the stable multifunctional intramedullary nail system of this embodiment is mainly composed of an intramedullary nail body, which includes three parts: a head support segment 1, a tail support segment 2 and a support segment 3.

[0034] Furthermore, the support segment 3 is provided with four sections, the support segment 3 and the support segment 3 are connected by threaded connection, the tail support segment 2 and the support segment 3 are connected by threaded connection, and the head support segment 1 and the support segment 3 are connected by threaded connection. The threaded connection has the advantages of convenient installation and disassembly, stable connection and good sealing.

[0035] It should be noted that, in order to fix the head support segment 1 and the tail support segment 2, transverse holes are opened in the head support segment 1 and the tail support segment 2, and stabilizing screws 6 connected to the bones are installed in the holes.

[0036] Reference Figure 1 and Figure 2 As shown, the support segment 3 is in the form of a metal sleeve, and a channel 301 is provided inside the support segment 3. A clamping mechanism 4 is installed inside the channel 301. The clamping mechanism 4 mainly includes three parts: a fixing member 401, a clamping sheet 402, and a cone head 403. The fixing member 401 is a cylindrical metal column, fixedly installed inside the support segment 3. Four clamping sheets 402 are rotatably connected to the fixing member 401, and the four clamping sheets 402 are evenly spaced around the fixing member 401. The clamping sheet 402 is approximately in the shape of a willow leaf, and the outer side of the clamping sheet 402 is an arcuate surface 1 4021, which is arched, and the inner side of the clamping sheet 402 is an arcuate surface 2 4022, which is arched, and the arcuate surface 2 4022 is concave.

[0037] Further, the cone head 403 is a cone with a sharp top and a thick bottom, and the top of the cone head 403 is spherical, and the surface of the cone head 403 abuts against the arc surface 4022 of the compression sheet 402. When the cone head 403 moves upward, it can push the compression sheet 402 open, causing the four compression sheets 402 to open outward.

[0038] Combination Figure 1 and Figure 2 As shown, a long vertical opening 302 is provided on the surface of the support segment 3, and the opening 302 is connected to the internal channel 301. A flexible sheet 303 is installed inside the opening 302, and the edges of the flexible sheet 303 are fixedly connected to the inner wall of the opening 302, and the inner wall of the flexible sheet 303 is abutted by the arc surface 4021 of the pressing sheet 402. Figure 1 As shown, when the stable multifunctional intramedullary nail system is installed in the bone, the cone head 403 moves upward to cause the compression sheet 402 to open outward, and then the compression sheet 402 lifts the flexible sheet 303 to compress the bone, thereby playing a fixing role. No punching fixation is used, which causes less damage to the bone.

[0039] It should be noted that the flexible sheet 303 is a silicone sheet that has been sterilized, which will not irritate the bones and will not produce rejection reactions. The flexible sheet 303 is relatively soft and will not exert a large pressure on the bones when acting on the bones, and has a good protective effect on the bones.

[0040] In some implementations of this embodiment, in order to drive the cone head 403 to move, a pull rope 4031 is connected to the top of the cone head 403, and a pull rope 4032 is connected to the bottom of the cone head 403. In two adjacent clamping mechanisms 4, the pull rope 4031 of the lower clamping mechanism 4 is connected to the pull rope 4032 of the upper clamping mechanism 4.

[0041] Further, combined with Figure 1 and Figure 4 As shown, a threaded head 4033 is installed at the top of the pull rope 1 4031, and a threaded sleeve 4034 is installed at the bottom of the pull rope 2 4032. The threaded sleeve 4034 and the threaded head 4033 can be threadedly connected, thereby connecting adjacent clamping mechanisms 4 together, so that the cone heads 403 move upward in unison.

[0042] It should be noted that both the pull rope 1 4031 and the pull rope 2 4032 can be made of braided metal wire, which has the advantages of being slightly high in strength and not prone to elastic deformation, and has a long service life.

[0043] Combination Figure 1 and Figure 3 As shown, the head support section 1 is a threaded tube, the moving member 5 is a metal column with threads, the moving member 5 is installed inside the head support section 1, and the moving member 5 can be raised or lowered by rotating the thread. The sleeve joint 501 is a hexagonal prism, which is compatible with the existing hexagonal sleeve, so that the hexagonal sleeve is covered with the sleeve joint 501, and the moving member 5 can be rotated by rotating the hexagonal sleeve.

[0044] like Figure 3 As shown, a mounting groove 503 is provided on the bottom surface of the movable part 5, and a rotating disk 504 is installed in the mounting groove 503. The rotating disk 504 can rotate freely. The pull rod 502 passes through the mounting groove 503 and is fixedly connected to the center of the bottom surface of the rotating disk 504. The bottom end of the pull rod 502 is fixedly connected to a pull rope 4031 of the uppermost clamping mechanism 4.

[0045] In order to prevent the first and second pull ropes 4031 and 4032 from twisting, the pull rod 502 is provided with a transverse through slot 5021, through which the anti-rotation plate 505 passes, and the left and right ends of the anti-rotation plate 505 are fixedly connected to the head support section 1. The vertical height of the through slot 5021 is greater than the vertical height of the anti-rotation plate 505, and does not affect the vertical movement of the pull rod 502.

[0046] The working principle of the stable multifunctional intramedullary nail system of the present invention is as follows:

[0047] The stable multifunctional intramedullary nail system is composed of an intramedullary nail body, which is composed of a head support segment, a tail support segment 2 and multiple support segments 3. The overall length of the stable multifunctional intramedullary nail system is controlled by controlling the number of support segments 3. Therefore, the stable multifunctional intramedullary nail system can be adjusted for different bone lengths, and is flexible to use and has a wide range of applications. After the stable multifunctional intramedullary nail system is installed in the bone, the moving part 5 is rotated to move the moving part 5 upward, the pull rope 1 4031 and the pull rope 2 4032 move upward, and the cone head 403 is pulled upward. The cone head 403 moves upward to open the compression plate 402, and the compression plate 402 opens the flexible plate 303 to press against the bone, which plays a role in fixing the support segment 3. The head support segment 1 and the tail support segment 2 are fixed with a stabilizing screw 6. This makes the stable multifunctional intramedullary nail system have a better fixing effect and is not easy to loosen.

[0048] In summary, the present invention provides a stable multifunctional intramedullary nail system, which includes an intramedullary nail body, the intramedullary nail body includes a head support section 1 and a tail support section 2, a plurality of support sections 3 are arranged between the head support section 1 and the tail support section 2, the head support section 1 and the tail support section 2 are both provided with a stabilizing screw 6 fixedly connected to the bone, a channel 301 is provided in the support section 3, a clamping mechanism 4 is provided in the channel 301, the clamping mechanism 4 includes a fixing member 401 fixedly connected to the support section 3, the fixing member 401 is rotatably connected to a plurality of uniformly distributed clamping sheets 402, the support section 3 is provided with a fixing member 401 that is opposite to the clamping sheet 402, and the fixing member 401 is rotatably connected to a plurality of uniformly distributed clamping sheets 402. The opening 302 is aligned and connected with the channel 301, and the opening 302 is provided with a flexible sheet 303 abutted by the pressing sheet 402. The pressing mechanism 4 also includes a cone head 403 for opening the pressing sheet 402, and the top and bottom of the cone head 403 are respectively connected with a pull rope 1 4031 and a pull rope 2 4032, and the pull rope 1 4031 of the cone head 403 is connected with the pull rope 2 4032 of another adjacent cone head 403. The internal thread of the head support section 1 is connected with a moving member 5, and the side of the moving member 5 facing the outlet is provided with a sleeve joint 501, and the bottom of the moving member 5 is provided with a pull rod 502 connected with the pull rope 1 4031 of the topmost pressing mechanism 4. The contact surface between the pressing sheet 402 and the flexible sheet 303 is an arched arc surface 1 4021. The contact surface between the clamping sheet 402 and the cone head 403 is a concave arc surface 2 4022, and the contact surface between the cone head 403 and the arc surface 2 4022 is a spherical surface. Four clamping sheets 402 are provided. The bottom surface of the movable member 5 is provided with a mounting groove 503, and the mounting groove 503 is provided with a rotating disk 504, and the pull rod 502 passes through the mounting groove 503 and is connected to the rotating disk 504. The pull rod 502 is provided with a through groove 5021, and the through groove 5021 is inserted with an anti-rotation plate 505 fixedly connected to the head support section 1. The pull rope 1 4031 is provided with a threaded head 4033, and the pull rope 2 4032 is provided with a threaded sleeve 4034 threadedly connected to the threaded head 4033. The pull rope 1 4031 and the pull rope 2 4032 are both configured as braided metal wires. The tail support segment 2 is threadedly connected to the support segment 3, the head support segment 1 is threadedly connected to the support segment 3, and the support segment 3 is threadedly connected to the support segment 3. The flexible sheet 303 is configured as a silicone sheet that has been sterilized. Therefore, the stable multifunctional intramedullary nail system of the present invention has good fixing effect, good protection effect on bones, controllable overall length, suitable for bones of different lengths, and diverse functions.

[0049] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stable multifunctional intramedullary nail system, characterized in that: The intramedullary nail comprises an intramedullary nail body, wherein the intramedullary nail body comprises a head support section (1) and a tail support section (2), a plurality of support sections (3) are arranged between the head support section (1) and the tail support section (2), and both the head support section (1) and the tail support section (2) are provided with a stabilizing screw (6) fixedly connected to the bone. The support segment (3) is provided with a channel (301), the channel (301) is provided with a clamping mechanism (4), the clamping mechanism (4) comprises a fixing member (401) fixedly connected to the support segment (3), the fixing member (401) is rotatably connected to a plurality of uniformly distributed clamping sheets (402), the support segment (3) is provided with an opening (302) aligned with the clamping sheet (402) and connected to the channel (301), The opening (302) is provided with a flexible sheet (303) abutted by the pressing sheet (402), the pressing mechanism (4) further comprises a cone head (403) for opening the pressing sheet (402), the top and bottom of the cone head (403) are respectively connected with a pull rope 1 (4031) and a pull rope 2 (4032), the pull rope 1 (4031) of the cone head (403) is connected with the pull rope 2 (4032) of another adjacent cone head (403), The head support section (1) is internally threadedly connected to a moving part (5), a sleeve joint (501) is provided on the side of the moving part (5) facing the outlet, and a pull rod (502) connected to the pull rope 1 (4031) of the clamping mechanism (4) at the top is provided at the bottom of the moving part (5).

2. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The contact surface between the compression sheet (402) and the flexible sheet (303) is an arched arc surface 1 (4021).

3. The stable multifunctional intramedullary nail system according to claim 2, characterized in that: The contact surface between the pressing sheet (402) and the cone head (403) is a concave arc surface 2 (4022), and the contact surface between the cone head (403) and the arc surface 2 (4022) is a spherical surface.

4. The stable multifunctional intramedullary nail system according to claim 3, characterized in that: Four compression plates (402) are provided.

5. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The bottom surface of the moving member (5) is provided with a mounting groove (503), the mounting groove (503) is provided with a rotating disk (504), and the pull rod (502) passes through the mounting groove (503) and is connected to the rotating disk (504).

6. The stable multifunctional intramedullary nail system according to claim 5, characterized in that: The pull rod (502) is provided with a through slot (5021), and an anti-rotation plate (505) fixedly connected to the head support section (1) is inserted into the through slot (5021).

7. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The pull rope 1 (4031) is provided with a threaded head (4033), and the pull rope 2 (4032) is provided with a threaded sleeve (4034) threadedly connected to the threaded head (4033).

8. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The pull rope 1 (4031) and the pull rope 2 (4032) are both configured as braided metal wires.

9. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The tail support section (2) is threadedly connected to the support segment (3), the head support section (1) is threadedly connected to the support segment (3), and the support segment (3) is threadedly connected to the support segment (3).

10. The stable multifunctional intramedullary nail system according to claim 1, characterized in that: The flexible sheet (303) is configured as a silicone sheet that has been sterilized.

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