Ulna and radius interlocking intramedullary nail device

Abstract

The utility model discloses an ulna and radius interlocking intramedullary nail device, and relates to the technical field of medical instruments, the ulna and radius interlocking intramedullary nail device comprises a rod body, the outer wall of the rod body is provided with four mounting holes, each mounting hole is provided with a locking nail, the top surface of the rod body is provided with a slot, and the locking nail is inserted into the slot. An installation auxiliary assembly is inserted into the insertion groove. The utility model discloses an ulna and radius interlocking intramedullary nail device, which is characterized in that the upper end of a rod body is provided with a slot, and an installation auxiliary component matched with the rod body is inserted into the slot, so that the installation position of a lock nail can be positioned outside the ulna and radius, and the outer diameter of a thread part in the lock nail is smaller than the inner diameter of an installation hole. The installation precision of the lock pin can be reduced, the lock pin can conveniently penetrate through the installation hole, the extrusion strips can be driven to move and be attached to the inner wall of the installation hole by rotating the screw in the lock pin forwards, the whole ulna and radius interlocking intramedullary nail device can be fixedly installed, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a locking intramedullary nail device for the ulna and radius. Background Technique

[0002] The ulna and radius are the ulna bone and the radius bone. The ulna is located on the inner side of the human forearm. When the palm is facing up, it is located on the side of the little finger, while the radius is opposite to the ulna and is located on the outer side of the forearm. When the palm is facing up, it is located on the side of the thumb.

[0003] When the ulna and radius are fractured, a locking intramedullary nail device is often used to fix multiple fractured ulna and radius together at present, so as to facilitate the rehabilitation of patients. The existing locking intramedullary nail device for the ulna and radius mainly consists of a rod body with mounting holes and locking nails. During installation, the locking nails are connected to the mounting holes, and the rod body with mounting holes is located inside the bone marrow. In the actual installation process, a high precision is required to achieve fixed installation, the installation requirements are high, and the installation is relatively inconvenient. Content of the Utility Model

[0004] The utility model provides a locking intramedullary nail device for the ulna and radius, which has the advantages of low installation requirements and convenient installation, so as to solve the problems raised in the background technique.

[0005] In order to solve the defects of high installation requirements and inconvenient installation of the existing locking intramedullary nail device for the ulna and radius, the utility model provides the following technical scheme: a locking intramedullary nail device for the ulna and radius, including a rod body, four mounting holes are opened on the outer wall of the rod body, a locking nail is installed on each mounting hole, a slot is opened on the top surface of the rod body, and a mounting auxiliary component is inserted into the slot.

[0006] As a preferred technical scheme of the utility model, the locking nail includes a head, one end of the head is integrally connected with a threaded part, the outer diameter of the threaded part is smaller than the inner diameter of the mounting hole, the threaded part penetrates through the mounting hole, a cavity is opened in the head, and a fastener extending to the outside of the head is arranged in the cavity.

[0007] As a preferred technical scheme of the utility model, the fastener includes a moving body located inside the cavity, one end of the moving body is threadedly connected with a screw, the screw penetrates through the moving body, a plurality of pairs of circumferentially distributed connecting bars are movably connected to the outer wall of the moving body, a plurality of slidably connected pressing bars are inlaid on the outer wall of the head, and each pair of connecting bars is movably connected with the pressing bar.

[0008] As a preferred technical scheme of the utility model, a plurality of the pressing bars are circumferentially distributed, the screw extends to the outside of one side of the head, and the screw is rotatably connected with the head.

[0009] As a preferred technical solution of the present utility model, the installation auxiliary component includes a top piece, one side of the bottom end of the top piece is integrally connected with an insertion post, the other side of the bottom end of the top piece is integrally connected with a long strip, and four positioning holes are opened on the outer wall of the long strip.

[0010] As a preferred technical solution of the present utility model, the positioning holes are aligned with the installation holes, the insertion post is inserted into the slot, and the cross sections of the insertion post and the slot are regular hexagons.

[0011] As a preferred technical solution of the present utility model, a threaded hole is opened on the outer wall of the long strip, and a bolt is threadedly connected to the threaded hole.

[0012] As a preferred technical solution of the present utility model, the materials of the rod body, the locking nail, the installation auxiliary component and the bolt are all Ti-6Al-4V.

[0013] Compared with the prior art, the present utility model provides a locking intramedullary nail device for the radius and ulna, which has the following beneficial effects: a slot is provided at the upper end of the rod body, and an installation auxiliary component matching the rod body is inserted into the slot, so that the positioning of the installation position of the locking nail can be realized outside the radius and ulna, and the outer diameter of the threaded part in the locking nail is set to be smaller than the inner diameter of the installation hole, which can reduce the installation precision of the locking nail, facilitate the locking nail to penetrate through the installation hole, and by rotating the screw in the locking nail forward, multiple pressing strips can be driven to move and fit on the inner wall of the installation hole, so as to realize the fixed installation of the entire locking intramedullary nail device for the radius and ulna, and the installation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a three-dimensional view of the locking nail of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the fastener of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the installation auxiliary component of the present utility model.

[0018] In the figure:

[0019] 10. Rod body; 20. Installation hole; 30. Locking nail; 31. Head; 32. Threaded part; 33. Fastener; 331. Moving body; 332. Screw; 333. Connecting strip; 334. Pressing strip; 40. Slot; 50. Installation auxiliary component; 51. Top piece; 52. Insertion post; 53. Long strip; 54. Positioning hole; 60. Threaded hole; 70. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 - 4 , the present utility model discloses a locked intramedullary nail device for the radius and ulna, including a rod body 10. Four mounting holes 20 are provided on the outer wall of the rod body 10. A locking nail 30 is installed on each mounting hole 20. A slot 40 is provided on the top surface of the rod body 10, and a mounting auxiliary component 50 is inserted into the slot 40.

[0022] Specifically, the locking nail 30 includes a head 31. One end of the head 31 is integrally connected with a threaded portion 32. The outer diameter of the threaded portion 32 is smaller than the inner diameter of the mounting hole 20. The threaded portion 32 penetrates through the mounting hole 20. A cavity is provided inside the head 31, and a fastener 33 extending to the outside of the head 31 is provided inside the cavity. The fastener 33 includes a moving body 331 located inside the cavity. One end of the moving body 331 is threadedly connected with a screw 332. The screw 332 penetrates through the moving body 331. A plurality of pairs of circumferentially distributed connecting bars 333 are movably connected to the outer wall of the moving body 331. A plurality of slidably connected extrusion bars 334 are inlaid on the outer wall of the head 31. Each pair of connecting bars 333 is movably connected to the extrusion bar 334. The plurality of extrusion bars 334 are circumferentially distributed. The screw 332 extends to the outside of one side of the head 31, and the screw 332 is rotatably connected to the head 31.

[0023] In this embodiment, the outer diameter of the locking nail 30 is smaller than that of the mounting hole 20, which is convenient for penetrating the mounting hole 20. After penetrating the mounting hole 20, the plurality of extrusion bars 334 can be driven to press against the inner wall of the mounting hole 20 by rotating the screw 332, so that the fixed installation of the locking nail 30 can be realized, and the installation difficulty is reduced.

[0024] Specifically, the mounting auxiliary component 50 includes a top piece 51. One side of the bottom end of the top piece 51 is integrally connected with an insertion post 52. The other side of the bottom end of the top piece 51 is integrally connected with a long strip 53. Four positioning holes 54 are provided on the outer wall of the long strip 53. The positioning holes 54 are aligned with the mounting holes 20. The insertion post 52 is inserted into the slot 40. The cross-sections of the insertion post 52 and the slot 40 are regular hexagons.

[0025] In this embodiment, the mounting auxiliary component 50 matching the rod body 10 is inserted into the slot 40. After insertion, at this time, the long strip 53 is aligned with the rod body 10, and the mounting hole 20 is aligned with the positioning hole 54, so that the positioning of the installation position of the locking nail 30 can be realized outside the radius and ulna.

[0026] Specifically, a threaded hole 60 is provided on the outer wall of the long strip 53, and a bolt 70 is threadedly connected to the threaded hole 60. The rod body 10, the locking pin 30, the installation auxiliary component 50, and the bolt 70 are all made of Ti-6Al-4V.

[0027] In this implementation scheme, the bolt 70 plays a supporting role for the long strip 53, and Ti-6Al-4V is the most common α-β titanium alloy, which consists of 90% titanium, 6% aluminum, and 4% vanadium, and has high strength and corrosion resistance.

[0028] The working principle and usage process of the present utility model: After inserting the rod body 10 into the ulna and radius, insert the insertion post 52 into the slot 40, rotate the bolt 70 clockwise so that it fits against the ulna and radius. At this time, the long strip 53 is aligned with the rod body 10, and at this time, the positioning hole 54 is aligned with the installation hole 20. Make a circular mark at the alignment of the positioning hole 54 and the ulna and radius. Remove the installation auxiliary component 50, and drill a hole at the marked position with the locking pin 30. When the locking pin 30 passes through the installation hole 20 and is fixedly connected to the other end of the ulna and radius, at this time, the screw 332 can be rotated clockwise, the moving body 331 moves accordingly and drives the plurality of connecting bars 333 to swing. At this time, the extrusion bar 334 is extruded by the connecting bars 333 and protrudes, and finally the extrusion bar 334 fits against the inner wall of the installation hole 20.

[0029] It should be noted that in this article, terms such as "including", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article, or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device including the said element.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A radius and ulna locking intramedullary nail device, characterized in that: It includes a rod body (10). Four mounting holes (20) are provided on the outer wall of the rod body (10). A locking pin (30) is mounted on each mounting hole (20). A slot (40) is provided on the top surface of the rod body (10), and a mounting auxiliary component (50) is inserted into the slot (40).

2. The radius and ulna locking intramedullary nail device according to claim 1, characterized in that: The locking pin (30) includes a head (31). One end of the head (31) is integrally connected with a threaded portion (32). The outer diameter of the threaded portion (32) is smaller than the inner diameter of the mounting hole (20). The threaded portion (32) penetrates through the mounting hole (20). A cavity is provided in the head (31), and a fastener (33) extending to the outside of the head (31) is provided in the cavity.

3. The radius and ulna interlocking intramedullary nail device according to claim 2, characterized in that: The fastener (33) includes a moving body (331) located inside the cavity. One end of the moving body (331) is threadedly connected with a screw (332). The screw (332) penetrates through the moving body (331). A plurality of pairs of circumferentially distributed connecting bars (333) are movably connected to the outer wall of the moving body (331). A plurality of slidably connected pressing bars (334) are inlaid on the outer wall of the head (31). Each pair of connecting bars (333) is movably connected to the pressing bar (334).

4. The radius and ulna interlocking intramedullary nail device according to claim 3, wherein: A plurality of the pressing bars (334) are circumferentially distributed. The screw (332) extends to the outside of one side of the head (31), and the screw (332) is rotatably connected to the head (31).

5. The radius and ulna locking intramedullary nail device according to claim 1, characterized in that: The mounting auxiliary component (50) includes a top piece (51). One side of the bottom end of the top piece (51) is integrally connected with a plug post (52). The other side of the bottom end of the top piece (51) is integrally connected with a long strip (53). Four positioning holes (54) are provided on the outer wall of the long strip (53).

6. The radius and ulna locking intramedullary nail device according to claim 5, characterized in that: The positioning holes (54) are aligned with the mounting holes (20). The plug post (52) is inserted into the slot (40). The cross sections of the plug post (52) and the slot (40) are regular hexagons.

7. The radius and ulna interlocking intramedullary nail device according to claim 5, characterized in that: A threaded hole (60) is provided on the outer wall of the long strip (53), and a bolt (70) is threadedly connected to the threaded hole (60).

8. The radius and ulna interlocking intramedullary nail device according to claim 7, characterized in that: The materials of the rod body (10), the locking pin (30), the mounting auxiliary component (50), and the bolt (70) are all Ti-6Al-4V.

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