A device for removing broken bone screws

Abstract

The utility model relates to surgical instrument technical field especially relates to a kind of orthopedics broken nail taking-out device, specifically includes: annular sleeve and locking strip, annular sleeve lower end is provided with sawtooth, and the inner wall of annular sleeve is recessed strip-shaped recess;The main part of locking strip can be inserted into strip-shaped recess, and can move in strip-shaped recess, and locking portion is located in strip-shaped recess outside, in the cavity of annular sleeve. Through annular sleeve rotation, the sawtooth of annular sleeve lower end can cut into bone, then locking strip is inserted into strip-shaped recess, and the locking portion of locking strip is embedded in the thread of broken nail, annular sleeve is rotated, and broken nail is rotated by locking strip, to be taken out from bone. The orthopedics broken nail taking-out device disclosed in the utility model, annular sleeve only needs to destroy the small area bone around broken nail, to take out broken nail, solve the problem that the bone around broken nail is more serious in prior art due to the blunt and large occlusion of broken nail forceps, tiger forceps, wire ligature forceps, so that the broken nail around the bone is more serious.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to an orthopedic broken nail removal device. Background Technology

[0002] In orthopedic surgery, bone screws (also known as orthopedic nails) are essential tools for fixing fracture fragments, stabilizing bones, or assisting with implants (such as plates and intramedullary nails). During use or removal, bone screws may break at the screw head due to metal fatigue, delayed bone healing, or excessive load. How to effectively, quickly, and safely remove broken screws is a common challenge in clinical practice.

[0003] The commonly used method for removing broken nails in surgery is to first destroy the bone around the broken nail to expose it, and then use tools such as nail breakers, pliers, or wire ligator to remove the broken nail. Because the jaws of nail breakers, pliers, and wire ligator are blunt and large, the bone around the broken nail is severely damaged. Utility Model Content

[0004] In view of this, the main purpose of this utility model is to provide an orthopedic broken nail removal device, which can solve the problem that in the prior art, when removing broken nails, the jaws of broken nail pliers, vise pliers, and wire ligation pliers are blunt and large, causing severe damage to the bone around the broken nail.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An orthopedic broken nail removal device includes: an annular sleeve and a locking bar, wherein the lower end of the annular sleeve is provided with serrations, and the inner wall of the annular sleeve is recessed with a strip-shaped groove, the strip-shaped groove extending through the length direction of the annular sleeve;

[0007] The locking bar includes a main body and a locking part. The main body is inserted into a strip-shaped groove, and the locking part extends out of the strip-shaped groove and into the cavity of the annular sleeve.

[0008] Preferably, the cross-section of the locking bar is an isosceles triangle, and the apex of the isosceles triangle is the locking portion.

[0009] Preferably, the lower end of the locking bar has a wedge-shaped block structure.

[0010] Preferably, the lower end of the locking portion of the locking bar is provided with an arc transition, and the lower end of the main body portion is provided with rounded corners.

[0011] Preferably, the length L of the locking portion of the locking bar extending into the cavity of the annular sleeve is less than the thread height.

[0012] Preferably, a travel limit block is provided at the upper end of the locking bar, and a clamping head is provided at the upper end of the travel limit block.

[0013] Preferably, the annular sleeve has a protruding connector on its upper outer wall.

[0014] Preferably, it further includes: a manual handle, wherein a through hole is formed at the upper end of the annular sleeve, and the manual handle is inserted into the through hole.

[0015] The outer wall of the annular sleeve is provided with size markings, and the outer wall of the locking strip is provided with size markings.

[0016] This utility model provides an orthopedic broken nail removal device, which has the following beneficial effects:

[0017] The orthopedic broken nail removal device of this utility model includes an annular sleeve and a locking bar. The lower end of the annular sleeve is provided with serrations, and the inner wall of the annular sleeve is recessed with a strip-shaped groove that runs through the length of the annular sleeve. The locking bar includes a main body and a locking part. The main body can be inserted into or is to be inserted into the strip-shaped groove and can move within the strip-shaped groove. The locking part is located outside the strip-shaped groove and inside the cavity of the annular sleeve.

[0018] By rotating the annular sleeve, the serrated edge at the lower end of the sleeve can cut into the bone. Then, a locking strip is inserted into the groove, and the locking part of the locking strip is embedded in the thread of the broken nail. Rotating the annular sleeve causes the broken nail to rotate through the locking strip, thereby removing the broken nail from the bone. The orthopedic broken nail removal device disclosed in this utility model only needs to damage a small area of ​​bone around the broken nail to remove it. This solves the problem in the prior art that the jaws of broken nail pliers, vises, and wire ligation pliers are blunt and large, resulting in more severe damage to the bone around the broken nail. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of an interrupted screw used in orthopedic surgery.

[0021] Figure 2 This is a schematic diagram of an orthopedic broken nail removal device according to one embodiment of the present disclosure;

[0022] Figure 3 for Figure 2 The BB section view shown;

[0023] Figure 4 for Figure 2 The GG cross-sectional view shown;

[0024] Figure 5 for Figure 4 The enlarged view at point H is shown below;

[0025] Figure 6 This is a schematic diagram of an annular sleeve structure according to one embodiment of the present disclosure;

[0026] Figure 7 This is a schematic diagram of a locking bar structure according to one embodiment of the present disclosure;

[0027] Figure 8 for Figure 7 The enlarged view at point C is shown.

[0028] [Explanation of Key Component Symbols]

[0029] 1. Annular sleeve;

[0030] 11. Serrated edge; 12. Striped groove; 13. Cavity; 14. Connector; 15. Through hole;

[0031] 2. Locking bar;

[0032] 21. Main body; 22. Locking part; 23. Rounded transition; 24. Rounded corner; 25. Clamping head; 26. Wedge block; 27. Travel limit block;

[0033] 3. Turn the handle;

[0034] 31. Limit head;

[0035] 4. Bones;

[0036] 5. Broken nail. Detailed Implementation

[0037] The orthopedic broken nail removal device of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] See Figures 1-8 This utility model provides a technical solution:

[0043] An orthopedic nail removal device includes: an annular sleeve 1 and a locking bar 2. The lower end of the annular sleeve 1 is provided with serrations 11, and the inner wall of the annular sleeve 1 is recessed with a strip-shaped groove 12 that extends through the length of the annular sleeve 1. The locking bar 2 includes a main body 21 and a locking part 22. The main body 21 can be inserted into the strip-shaped groove 12 and can move within the strip-shaped groove 12. The locking part 22 extends out of the strip-shaped groove 12 and into the cavity 13 of the annular sleeve 1.

[0044] By rotating the annular sleeve 1, the serrations 11 at the lower end of the annular sleeve 1 can cut into the bone 4 surrounding the broken nail 5. Then, the main body 21 of the locking strip 2 is inserted into the strip-shaped groove 12, and the locking part 22 of the locking strip 2 is embedded in the thread of the broken nail 5. By rotating the annular sleeve 1, the broken nail 5 is rotated through the locking strip 2, thereby removing the broken nail 5 from the bone 4. Compared with tools such as nail breakers, pliers, and wire ligators, this invention only damages a small area of ​​bone around the broken nail to remove it. This solves the problem in the prior art that the blunt and large jaws of nail breakers, pliers, and wire ligators cause severe damage to the bone around the broken nail.

[0045] To ensure reliable operation and easy embedding into the broken nail thread, the cross-section of the locking bar 2 is an isosceles triangle, with the locking part 22 at the apex of the isosceles triangle. For reliable operation, the angle is between 30° and 60°. This allows the locking part 22 to be easily embedded into the broken nail thread, while also ensuring that the locking bar 2 is strong enough to rotate the broken nail 5, thereby removing the broken nail 5.

[0046] To allow the locking bar 2 to be smoothly inserted into the strip groove 12 of the annular sleeve 1, the lower end of the locking bar 2 is a wedge-shaped block 26 structure.

[0047] The lower end of the locking portion 22 of the locking bar 2 is provided with an arc transition 23, and the lower end of the main body portion 21 is provided with a rounded corner 24. The arc transition 23 allows the wedge block 26 to enter the thread of the broken nail at an angle, which is more labor-saving and can also prevent the sharp part of the locking portion 22 from bending or breaking when it is embedded in the thread of the broken nail; the rounded corner 24 can prevent the sharp part of the main body portion 21 from bending or breaking when the annular sleeve 1 rotates, so as to prevent excess material from remaining in the bone.

[0048] The locking portion 22 of the locking bar 2 extends into the cavity of the annular sleeve 1 by a length L less than the thread height. Since the locking portion 22 can damage the thread of the broken pin and become embedded in it, the length L should be less than the thread height. If the length L is too long, the locking portion 22 of the locking bar 2 may damage the threaded rod, making it difficult for the locking bar 2 to smoothly enter the strip-shaped groove 12 due to the resistance of the threaded rod.

[0049] A travel limit block 27 is provided at the upper end of the locking bar 2, and a clamping head 25 is provided at the upper end of the travel limit block 27. The cross-sectional dimension of the travel limit block 27 is larger than the cross-sectional dimension of the strip groove 12, so that the clamping head 25 always maintains a certain distance from the annular sleeve 1, making it easy for the clamping head 25 to be clamped.

[0050] To facilitate the connection between the annular sleeve 1 and the power tool, a connector 14 is provided on the upper end of the annular sleeve 1, and the connector 14 is adapted to the interface of the power tool.

[0051] In some special cases, broken nails need to be manually unscrewed. To facilitate manual unscrewing of broken nails, the orthopedic broken nail removal device also includes: a manual handle 3, and a through hole 15 at the upper end of the annular sleeve 1. The manual handle 3 is inserted into the through hole 15. A limiting head 31 is provided at one end of the manual handle 3. During manual rotation, the manual handle 3 is inserted into the through hole 15, and the limiting head 31 contacts the annular sleeve 1. This increases the lever arm during rotation, making it easier to unscrew the broken nail.

[0052] The outer wall of the annular sleeve 1 is marked with dimensions, and the outer wall of the locking strip 2 is marked with dimensions. The dimensions marked on the outer wall of the annular sleeve 1 make it clear how much the annular sleeve 1 cuts into the bone 4 around the broken nail 5, and the dimensions marked on the outer wall of the locking strip 2 make it clear how deep the locking strip 2 penetrates.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A device for removing broken orthopedic nails, characterized in that, include: The annular sleeve (1) and the locking bar (2) are provided with serrations (11) at the lower end of the annular sleeve (1) and a strip-shaped groove (12) is recessed on the inner wall of the annular sleeve (1) and the strip-shaped groove (12) extends through the length direction of the annular sleeve (1). The locking bar (2) includes a main body (21) and a locking part (22). The main body (21) is inserted into the strip groove (12), and the locking part (22) extends out of the strip groove (12) and into the cavity (13) of the annular sleeve (1).

2. The orthopedic broken nail removal device according to claim 1, characterized in that, The cross-section of the locking bar (2) is an isosceles triangle, and the apex of the isosceles triangle is the locking part (22).

3. The orthopedic broken nail removal device according to claim 2, characterized in that, The lower end of the locking bar (2) is a wedge-shaped block (26) structure.

4. The orthopedic broken nail removal device according to claim 3, characterized in that, The lower end of the locking part (22) of the locking bar (2) is provided with an arc transition (23), and the lower end of the main body part (21) is provided with a rounded corner (24).

5. The orthopedic broken nail removal device according to claim 3, characterized in that, The locking portion (22) of the locking bar (2) extends into the cavity of the annular sleeve (1) for a length L that is less than the thread height.

6. The orthopedic broken nail removal device according to claim 1, characterized in that, The upper end of the locking bar (2) is provided with a travel limit block (27), and the upper end of the travel limit block (27) is provided with a clamping head (25).

7. The orthopedic broken nail removal device according to claim 1, characterized in that, The annular sleeve (1) has a connector (14) protruding from the outer wall of its upper end.

8. The orthopedic broken nail removal device according to claim 1, characterized in that, Also includes: Manual handle (3), the annular sleeve (1) has a through hole (15) at the upper end, and the manual handle (3) is inserted into the through hole (15).

9. The orthopedic broken nail removal device according to claim 1, characterized in that, The outer wall of the annular sleeve (1) is provided with size markings, and the outer wall of the locking strip (2) is provided with size markings.

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