Broken intramedullary nail taking-out device

Abstract

The broken intramedullary nail taking-out device is characterized by comprising a limiting pull rod, and one end of the limiting pull rod is a connector matched with threads of an intramedullary nail; a positioning plug is further included and is of a cylinder structure, a positioning through hole perpendicular to the axis of the positioning plug is formed in the positioning plug, the positioning through hole and the connector are coaxial and matched in a threaded mode, and the axial length of the positioning plug is smaller than the diameter of the medullary cavity and larger than the diameter of the connector. Through reasonable arrangement of the component structure, the positioning plug and the limiting pull rod are matched to fix the broken intramedullary nail from the interior of the broken intramedullary nail, the broken nail returns from an original implantation path, and the problems that a wound needs to be additionally added to a bone, and treatment and recovery difficulty is increased are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a device for removing a broken intramedullary nail. Background Art

[0002] Intramedullary nails in orthopedics are a necessary and superior solution for treating tubular fractures. However, if the intramedullary nail breaks during the operation, the broken nail implanted in the medullary cavity should be removed. Generally, a long strip of opening should be made in the tubular bone starting from the broken nail site, and then the broken nail at the distal end of the intramedullary nail should be removed. This method will cause damage to the patient's bones and increase the patient's recovery time. It also increases the difficulty of removing the intramedullary nail. Summary of the invention

[0003] In view of the above problems, the purpose of the utility model is to provide a broken intramedullary nail removal device, which solves the problem of inconvenience in removing the broken nail at the distal end during the removal of the broken intramedullary nail by reasonably arranging the component structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes:

[0005] A device for removing a broken intramedullary nail comprises a limiting pull rod, one end of which is a connector that matches the intramedullary nail thread; and a positioning plug, which is a columnar structure and is provided with a positioning through hole perpendicular to its axis. The positioning through hole is coaxial with the connector and the threads match it, and the axial length of the positioning plug is less than the medullary cavity diameter and greater than the connector diameter.

[0006] Preferably, an auxiliary locking mechanism is further included, an auxiliary positioning hole is provided at the end of the positioning plug, the auxiliary positioning hole is perpendicular to the positioning through hole but does not intersect, and the auxiliary locking mechanism is threadedly matched with the auxiliary positioning hole.

[0007] Preferably, it also includes a pulling handle, one end of which is provided with a second pair of joints, and the other end of the limiting pull rod is provided with a first pair of joints that match the second pair of joints structure.

[0008] Preferably, a limit platform is provided at the other end of the pulling handle, the middle of the pulling handle to one end is a stable section, and the middle of the pulling handle to the other end is an impact section.

[0009] Compared with the prior art, the advantages of the utility model are:

[0010] (1) The broken nail removal device of the utility model, through the reasonable arrangement of the component structure, cooperates with the positioning plug and the limit pull rod to fix the broken nail of the intramedullary nail from the inside of the broken nail of the intramedullary nail, and returns the broken nail to the original implantation path, thereby avoiding the need to add additional wounds to the bone and increasing the difficulty of treatment and recovery.

[0011] (2) The broken intramedullary nail removal device of the present invention, through the reasonable arrangement of the component structure, uses the original hole during the operation to fix the broken nail, thereby avoiding secondary wounds to the patient's bones, reducing and avoiding the problem of additional trauma to the patient, and avoiding the problem of increasing the amount of bone defect in the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0013] Figure 1 It is a structural schematic diagram of a broken intramedullary nail removal device of the utility model;

[0014] Figure 2 for Figure 1 Structural schematic diagram of the middle positioning plug;

[0015] Figure 3 for Figure 1 A schematic diagram of the structure of the middle limit rod;

[0016] Figure 4 for Figure 1 Schematic diagram of the structure of the middle hitting and pulling handle;

[0017] The symbols in the figure represent:

[0018] 1 limit pull rod; 1-1 connector, 1-2 first pair of connectors;

[0019] 2 positioning plug; 2-1 positioning through hole;

[0020] 3: pulling handle; 3-1: second pair of joints; 3-2: limit table; 3a: stable section; 3b: impact section;

[0021] 4Auxiliary locking mechanism. DETAILED DESCRIPTION

[0022] The utility model is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the utility model.

[0023] It should be noted that the directional terms mentioned in this article, such as "inner cavity", "inner periphery", "inner wall" and "outside", are consistent with the specific directions on the paper of the drawings in the specification or the corresponding directions of the space shown in the drawings; all components and equipment in the utility model, unless otherwise specified, are all components and equipment known in the prior art.

[0024] Example

[0025] The present embodiment discloses a device for removing a broken intramedullary nail, comprising a limiting pull rod 1, one end of which is a connector 1-1 that matches the intramedullary nail thread; further comprising a positioning plug 2, which is a columnar structure, and is provided with a positioning through hole 2-1 perpendicular to its axis, the positioning through hole 2-1 is coaxial with the connector 1-1 and the threads match, and the axial length of the positioning plug 2 is smaller than the medullary cavity diameter and larger than the diameter of the connector 1-1; further comprising an auxiliary locking mechanism 4, an auxiliary positioning hole is provided at the end of the positioning plug 2, the auxiliary positioning hole is perpendicular to the positioning through hole 2-1 but does not intersect, and the auxiliary locking mechanism 4 matches the thread of the auxiliary positioning hole.

[0026] When the intramedullary nail implanted in the body is broken, the broken nail at the proximal end is first taken out, and then the original fixing screw at the distal end of the intramedullary nail is taken out, and the auxiliary locking mechanism 4 is used to rotate and screw into the auxiliary positioning hole at the end of the positioning plug 2 to stably combine the two, and then the positioning plug 2 is put into the hole left after the fixing screw used at the distal end of the intramedullary nail is taken out, and is used to replace the original fixing screw, and is put into the screw hole at the distal end of the intramedullary nail. At this time, the positioning plug 2 is located in the medullary cavity, and the auxiliary locking mechanism 4 prevents the positioning plug 2 from slipping off and falling into the medullary cavity before the subsequent connection with the limit pull rod 1 is completed;

[0027] After the auxiliary locking mechanism 4 is connected to the positioning plug 2, the positioning plug 2 is rotated and adjusted by rotating the auxiliary locking mechanism 4 so that the positioning hole 2-1 is located coaxially directly below the limiting pull rod 1. At this time, the limiting pull rod 1 is penetrated and rotated to make the connecting head 1-1 screwed into and pass through the positioning hole 2-1. At the same time, the connecting head 1-1 is threadedly connected to the broken nail at the distal end. At this time, the limiting pull rod 1 is tightly combined with the connecting head 1-1 and the broken nail at the distal end respectively; after the combination is completed, the auxiliary locking mechanism 4 in the auxiliary positioning hole of the positioning plug 2 is rotated to remove the positioning plug 2; the positioning plug 2 is only fixed on the intramedullary nail instead of the bone, and its axial length is less than the diameter of the medullary cavity, which will not increase the resistance in the medullary cavity when it is removed.

[0028] It also includes a pulling handle 3, one end of which is provided with a second pair of joints 3-1, and the other end of the limiting pull rod 1 is provided with a first pair of joints 1-2 that matches the second pair of joints 3-1 structure; the other end of the pulling handle 3 is provided with a limiting platform 3-2, the middle of the pulling handle 3 to one end is a stable section 3a, and the middle of the pulling handle 3 to the other end is an impact section 3b; when in use, the second pair of joints 3-1 at one end of the pulling handle 3 is connected with the first pair of joints 1-2, the stable section 3a is held by hand, and the limiting platform 3-2 is knocked along the impact section 3b with an orthopedic sliding hammer, so that an impact force is provided to the limiting pull rod 1, and the broken intramedullary nail is pulled out from the original route.

[0029] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0030] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations. In addition, the various different embodiments disclosed in this solution can also be combined arbitrarily, as long as they do not violate the ideas of this disclosure, they should also be regarded as the contents invented by this disclosure.

Claims

1. A broken intramedullary nail removal device, characterized in that: It comprises a limiting pull rod (1), one end of which is a connector (1-1) matching the thread of the intramedullary nail; The device also comprises a positioning plug (2), which is a columnar structure, and is provided with a positioning through hole (2-1) perpendicular to its axis, the positioning through hole (2-1) is coaxial with the connector (1-1) and has matching threads, and the axial length of the positioning plug (2) is smaller than the diameter of the medullary cavity and larger than the diameter of the connector (1-1).

2. The broken intramedullary nail removal device according to claim 1, characterized in that: It also includes an auxiliary locking mechanism (4); an auxiliary positioning hole is provided at the end of the positioning plug (2); the auxiliary positioning hole is perpendicular to the positioning through hole (2-1) but does not intersect; the auxiliary locking mechanism (4) is threadedly matched with the auxiliary positioning hole.

3. The broken intramedullary nail removal device according to claim 2, characterized in that: It also comprises a pulling handle (3), one end of which is provided with a second pair of joints (3-1), and the other end of the limit pull rod (1) is provided with a first pair of joints (1-2) that are structurally matched with the second pair of joints (3-1).

4. The broken intramedullary nail removal device according to claim 3, characterized in that: The other end of the pulling handle (3) is provided with a limit platform (3-2), the middle of the pulling handle (3) to one end is a stabilizing section (3a), and the middle of the pulling handle (3) to the other end is an impact section (3b).

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