Resetting, positioning and fixing device for fracture of metacarpal bone

Abstract

The utility model discloses a metacarpal bone fracture reduction, positioning and fixing device. The metacarpal bone fracture reduction, positioning and fixing device comprises an entering rod, an outer fixing rod and an elbow, the entering rod is inserted into the metacarpal bone, the entering rod is divided into a rod part, a tip part and an oblique inserting part, the tip part and the oblique inserting part are arranged at the two ends of the rod part respectively, and a plurality of second threaded holes are formed in the axial direction of the rod part; the outer fixing rod is arranged outside the metacarpal bone, and a plurality of first threaded holes matched with the second threaded holes are formed in the axial direction of the outer fixing rod; the elbow is used for mutual connection and fixation between the entering rod and the outer fixing rod, one end of the elbow is detachably connected with the end, away from the rod part, of the oblique inserting part, the end, away from the oblique inserting part, of the elbow is detachably connected with the end of the outer fixing rod, and a positioning hole is formed in the elbow.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture reduction instruments, and more specifically, to a metacarpal fracture reduction, positioning and fixing device. Background Art

[0002] Metacarpal fracture is one of the common hand fractures. The metacarpal bone is composed of 5 bones, and metacarpal fractures mostly occur in the first metacarpal bone. The main clinical manifestations are local swelling and pain, functional impairment, obvious tenderness or metacarpal shortening and deformity. This disease can be caused by direct and indirect violence, and is more common in adults and less common in children. If this type of fracture is well reduced, correctly fixed and properly cared for, it can generally be cured with a good prognosis. Untimely or improper treatment may leave fracture deformities and affect the patient's quality of life.

[0003] Surgical treatment of metacarpal fractures includes closed reduction and Kirschner wire fixation and open reduction and plate and screw fixation. There are problems with intraoperative reduction, and the position after reduction is difficult to maintain. Fracture fixation requires repeated operations and is difficult to complete in one go. Utility Model Content

[0004] The utility model aims to provide a metacarpal fracture reduction, positioning and fixing device, which is an instrument capable of reducing, positioning and fixing broken bones.

[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a metacarpal fracture reduction, positioning and fixation device, comprising an entry rod, an external fixation rod and an elbow.

[0006] The entry rod is inserted into the metacarpal bone, the entry rod is divided into a rod portion and a tip portion and an oblique insertion portion respectively arranged at both ends of the rod portion, and a plurality of second threaded holes are opened in the axial direction of the rod portion;

[0007] The external fixation rod is placed outside the metacarpal bone, and a plurality of first threaded holes matching the second threaded holes are formed in the axial direction of the external fixation rod;

[0008] The elbow is used to connect and fix the entry rod and the external fixing rod to each other. One end of the elbow is detachably connected to the end of the oblique insertion part away from the rod part, and the end of the elbow away from the oblique insertion part is detachably connected to the end of the external fixing rod. A positioning hole is provided on the elbow.

[0009] The entry rod can ensure that after entering the metacarpal bone, the internal positioning effect and adjustment function can be achieved, and the auxiliary adjustment Kirschner wire provides a positioning point; the setting of the external fixation rod assists the entry rod to fix the end of the adjusted Kirschner wire, and the setting of the elbow can ensure that the positional relationship between the entry rod and the external fixation rod is restricted and will not change due to external force.

[0010] The utility model is further configured as follows: a fixing component is also arranged inside the oblique insertion part near the connection between the oblique insertion part and the rod part.

[0011] By providing the fixing component, it can be ensured that the position of the entry rod after entering the metacarpal bone will not move axially along the hollow position in the bone.

[0012] The utility model is further configured as follows: the fixing component includes a fixing cone arranged in the oblique insertion part, a connecting plate is arranged on the bottom side of the fixing cone, one end of the connecting plate away from the fixing cone is rotatably connected to the oblique insertion part, and a spring is arranged on the bottom surface of the fixing cone.

[0013] The setting of the fixing cone can prevent the entry rod from moving forward and backward, and the fixing cone can achieve an anchoring effect with the inner wall of the intrabone space.

[0014] The utility model is further configured as follows: the second threaded hole is a threaded hole with an open end.

[0015] The threaded hole passing through the opening is a half hole here instead of a through hole, and the fixing effect of the half hole is better.

[0016] The utility model is further configured as follows: the first threaded hole is a threaded through hole.

[0017] The first threaded hole is a through hole that can be fixed twice, which is equivalent to first using an adjustment Kirschner wire for adjustment, then inserting an external fixation rod from the tail end of the adjustment Kirschner wire, and finally adding a bent pipe to achieve the fixation effect.

[0018] The utility model is further configured as follows: a first oblique insertion hole is provided at one end of the external fixing rod close to the elbow, a second oblique insertion hole is provided at one end of the entry rod close to the elbow, and the axes of the first oblique insertion hole and the second oblique insertion hole are collinear.

[0019] The provision of the first oblique insertion hole and the second oblique insertion hole can effectively achieve the effect of temporary positioning.

[0020] In summary, the utility model has the following beneficial effects: the entry rod can ensure that the internal positioning effect and adjustment effect can be achieved after entering the metacarpal bone, and the auxiliary adjusted Kirschner wire provides a positioning point; and the setting of the external fixation rod assists the entry rod in fixing the end of the adjusted Kirschner wire, and the setting of the elbow can ensure that the positional relationship between the entry rod and the external fixation rod is restricted and will not change due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a combined state diagram in an embodiment of the utility model;

[0022] Figure 2 is a three-dimensional diagram of an entry rod in an embodiment of the utility model;

[0023] Figure 3 is a cross-sectional view of an entry rod in an embodiment of the utility model;

[0024] Figure 4 is a three-dimensional diagram of an external fixing rod in an embodiment of the utility model;

[0025] Figure 5 is a cross-sectional view of an external fixing rod in an embodiment of the utility model;

[0026] Figure 6 It is a cross-sectional view of the bent portion in an embodiment of the present utility model.

[0027] In the figure:

[0028] 1. entry rod; 11. rod portion; 111. second threaded hole; 12. tip portion; 13. oblique insertion portion; 131. second oblique insertion hole; 132. fixing component; 1321. connecting plate; 1322. button; 1323. spring; 1324. fixing cone;

[0029] 2. External fixing rod; 21. First threaded hole; 22. First oblique insertion hole;

[0030] 3. Elbow; 31. Vertical part; 32. Bend; 33. Oblique part. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0032] It should be noted that if the terms "first", "second", etc. are involved in the specification and claims of the utility model and the above-mentioned drawings, they are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, if the terms "including" and "having" and any of their variations are involved, it is intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In addition, in the present invention, the terms "installation", "setting", "provided with", "connection", "connected", "socketing" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] The following is combined with Figure 1-6 The utility model is described in further detail.

[0036] Example

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a metacarpal fracture reduction, positioning and fixation device includes an entry rod 1, an external fixation rod 2 and an elbow 3.

[0038] The entry rod 1 is inserted into the metacarpal bone. The entry rod 1 is divided into a rod portion 11 and a tip portion 12 and an oblique insertion portion 13 respectively arranged at both ends of the rod portion 11. A plurality of second threaded holes 111 are opened in the axial direction of the rod portion 11, and the second threaded holes 111 are opened toward the oblique insertion portion 13.

[0039] The second threaded hole 111 is a threaded hole with one end open; the threaded hole through the opening is a half hole here instead of a through hole, and the fixing effect of the half hole is better.

[0040] A fixing component 132 is also provided inside the oblique insertion portion 13 near the connection between the oblique insertion portion 13 and the rod portion 11; the fixing component 132 can ensure that the position of the entry rod 1 after entering the metacarpal bone will not move axially along the hollow position in the bone.

[0041] The fixing component 132 includes a fixing cone 1324 arranged in the oblique insertion portion 13, a connecting plate 1321 is arranged on the bottom side of the fixing cone 1324, one end of the connecting plate 1321 away from the fixing cone 1324 is rotatably connected to the oblique insertion portion 13, and a spring 1323 is arranged on the bottom surface of the fixing cone 1324; the setting of the fixing cone 1324 can achieve the effect of preventing the entry rod 1 from moving forward and backward, and the fixing cone 1324 can achieve an anchoring effect with the inner wall of the bone space.

[0042] Preferably, the fixing component 132 further includes a button 1322, which is disposed on the connecting plate 1321 and at least partially extends out of the oblique insertion portion 13 for a user to press, thereby preventing the device from getting stuck and being unable to be directly pulled out.

[0043] The external fixation rod 2 is placed outside the metacarpal bone, and a plurality of first threaded holes 21 matching the second threaded holes 111 are opened in the axial direction of the external fixation rod 2. When the external fixation rod 2 is fixed to the entry rod 1 through the elbow 3, each first threaded hole 21 has a second threaded hole 111 that is concentrically aligned with it.

[0044] The first threaded hole 21 is a threaded through hole; the first threaded hole 21 is a through hole that can be fixed twice, which is equivalent to first using an adjustment Kirschner wire for adjustment, then inserting the external fixation rod 2 from the tail end of the adjustment Kirschner wire, and finally adding a bent pipe to achieve the fixing effect.

[0045] A first oblique insertion hole 22 is provided at one end of the external fixing rod 2 close to the elbow 3, and a second oblique insertion hole 131 is provided at one end of the entry rod 1 close to the elbow 3, and the axes of the first oblique insertion hole 22 and the second oblique insertion hole 131 are collinear; the setting of the first oblique insertion hole 22 and the second oblique insertion hole 131 can effectively achieve the effect of temporary positioning.

[0046] The elbow 3 is used to connect and fix the entry rod 1 and the external fixing rod 2 to each other. One end of the elbow 3 is detachably connected to the end of the oblique insertion portion 13 away from the rod portion 11, and the end of the elbow 3 away from the oblique insertion portion 13 is detachably connected to the end of the external fixing rod 2.

[0047] In this embodiment, the detachable connection method can be understood as a snap connection or an interference connection.

[0048] Specific implementation methods of the snap connection include: ball spring 1323, snap buckle, rotating snap buckle and the like.

[0049] The specific implementation methods of interference fit connection include plug-in and the like.

[0050] Preferably, a positioning hole is provided on the elbow 3 .

[0051] Working principle: The entry rod 1 can ensure that the internal positioning effect and adjustment function can be achieved after entering the metacarpal bone, and the auxiliary adjustment Kirschner wire provides a positioning point; the setting of the external fixation rod 2 assists the entry rod 1 to fix the end of the adjusted Kirschner wire, and the setting of the elbow 3 can ensure that the positional relationship between the entry rod 1 and the external fixation rod 2 is restricted and will not change due to external force.

[0052] Operation process: first, connect the elbow 3 with the entry rod 1, and then use the elbow 3 as a deep "handle" to hold the elbow 3 to insert the entry rod 1 into the metacarpal bone, and then insert a Kirschner wire into the first threaded hole 21 at the end of the entry rod 1 to fix it, use an instrument to reposition the broken bone "mobile bone", and after the repositioning is completed, use the fixing component 132 to clamp and fix the broken bone "mobile bone", and finally install the external fixation rod 2 on the elbow 3, and finally use the Kirschner wire to fix the broken bone, and insert a Kirschner wire into the first oblique hole 22 and the second oblique hole 131 to finally achieve fixation.

[0053] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0054] In addition, the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the utility model, and these solutions also belong to the disclosure scope of the utility model and fall within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are illustrative and do not constitute a limitation of the claims. The protection scope of the utility model is defined by the claims and their equivalents.

Claims

1. A metacarpal fracture reduction, positioning and fixation device, characterized in that: An entry rod (1) is inserted into the metacarpal bone, wherein the entry rod (1) is divided into a rod portion (11) and pointed portions (12) and an oblique insertion portion (13) respectively arranged at both ends of the rod portion (11), and a plurality of second threaded holes (111) are opened in the axial direction of the rod portion (11); An external fixing rod (2) is placed outside the metacarpal bone, and a plurality of first threaded holes (21) matching with the second threaded holes (111) are formed in the axial direction of the external fixing rod (2); The elbow (3) is used for interconnecting the entry rod (1) and the external fixing rod (2); one end of the elbow (3) is detachably connected to an end of the oblique insertion portion (13) away from the rod portion (11); and the end of the elbow (3) away from the oblique insertion portion (13) is detachably connected to the end of the external fixing rod (2) (1); a positioning hole is provided on the elbow (3).

2. The metacarpal fracture reduction, positioning and fixation device according to claim 1, characterized in that: A fixing component (132) is also provided inside the oblique insertion portion (13) near the connection between the oblique insertion portion (13) and the rod portion (11).

3. The metacarpal fracture reduction, positioning and fixation device according to claim 2, characterized in that: The fixing component (132) comprises a fixing cone (1324) arranged in the oblique insertion portion (13); a connecting plate (1321) is arranged on the bottom side of the fixing cone (1324); an end of the connecting plate (1321) away from the fixing cone (1324) is rotatably connected to the oblique insertion portion (13); and a spring (1323) is arranged on the bottom surface of the fixing cone (1324).

4. The metacarpal fracture reduction, positioning and fixation device according to claim 1, characterized in that: The second threaded hole (111) is a threaded hole with one end open.

5. The metacarpal fracture reduction, positioning and fixation device according to claim 1, characterized in that: The first threaded hole (21) is a threaded through hole.

6. The metacarpal fracture reduction, positioning and fixation device according to claim 1, characterized in that: A first oblique insertion hole (22) is provided at one end of the external fixing rod (2) close to the elbow (3), and a second oblique insertion hole (131) is provided at one end of the entry rod (1) close to the elbow (3), and the axes of the first oblique insertion hole (22) and the second oblique insertion hole (131) are collinear.

Images