CN113040887A

CN113040887A - Intramedullary nail structure

Info

Publication number: CN113040887A
Application number: CN202110267591.9A
Authority: CN
Inventors: 袁博文; 李健; 施聪聪; 廖棋宾
Original assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Current assignee: Beijing Libeier Bio Engineering Institute Co Ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-06-29
Anticipated expiration: 2041-03-11
Also published as: CN113040887B

Abstract

The invention provides an intramedullary nail structure, the intramedullary nail structure includes: a first fixing nail, a second fixing nail and a first flexible connecting body, the first end of the first flexible connecting body is penetrated through the first fixing nail inside and connected with the first fixing nail, the second end of the first flexible connecting body is penetrated in the second fixing nail and connected with the second fixing nail, the first fixing nail and the second fixing nail can be connected by the first flexible connecting body relative activity. The technical solution provided by the present application can solve the problem that the joint cannot move after fusion treatment in the prior art.

Description

Intramedullary nail structure

Technical Field

The invention relates to the technical field of medical instruments, in particular to an intramedullary nail structure.

Background

For patients with ankle traumatic and osteoarthritis, the patients cannot walk for a long time and do physical work, and the working life of the patients is seriously influenced, and at present, the patients are mainly treated by ankle fusion and replacement.

When the ankle joint fusion is used for treatment, an intramedullary nail is generally used for fusion treatment in a manner of fixing the intramedullary nail, and the intramedullary nail penetrates through the talar joint and the tibio-talar joint. However, the treatment mode can fix the talar joint and the tibio-talar joint, the activity degrees of the two joints are completely lost after the operation, the normal physiological activity of the joints is blocked, and the early exercise can not be performed after the operation of the patient.

Disclosure of Invention

The invention provides an intramedullary nail structure, which aims to solve the problem that joints cannot move after fusion treatment in the prior art.

The invention provides an intramedullary nail structure, comprising: first staple, second staple and first flexible connector, the first end of first flexible connector is worn to establish in first staple and is connected with first staple, and the second end of first flexible connector is worn to establish in the second staple and is connected with the second staple, and first staple and second staple can the relative activity through first flexible connector.

Furthermore, the first fixing nail is provided with a first mounting hole, the second fixing nail is provided with a second mounting hole, the first end of the first flexible connecting body is fixed in the first mounting hole, and the second end of the first flexible connecting body is movably arranged in the second mounting hole.

Furthermore, a limiting structure is arranged between the second end of the first flexible connecting body and the second mounting hole.

Further, the second mounting hole has the taper hole section, and the diameter of taper hole section is held the cooperation spacingly with the second of first flexible connector by the direction crescent of second staple to first staple.

Furthermore, the first flexible connector is provided with a first section, a second section and a third section which are connected with each other, the first section and the second section are of a step structure, the diameter of the first section is larger than that of the second section, and the diameter of the third section is gradually increased towards the direction far away from the first section.

Further, a thread structure is arranged between the first fixing nail and the second fixing nail, and the first fixing nail and the second fixing nail can be connected and fixed through the thread structure.

Furthermore, one end, close to the second fixing nail, of the first mounting hole is provided with an internal thread, the end, provided with the second mounting hole, of the second fixing nail is provided with an annular boss, an external thread is arranged on the annular boss, and the internal thread and the external thread form a thread structure.

Further, the intramedullary nail structure still includes third fixed nail and second flexible connector, and the first end of second flexible connector is worn to establish in the second fixed nail and is connected with the second fixed nail, and the second end of second flexible connector is worn to establish in the third fixed nail and is connected with the third fixed nail, and second fixed nail and third fixed nail can relative activity through second flexible connector.

Furthermore, the intramedullary nail structure further comprises transverse locking nails, and the transverse locking nails are arranged on the first fixing nail and the second fixing nail in a penetrating mode.

Further, the first flexible connector and/or the second flexible connector are made of a polycarbonate polyurethane material.

By applying the technical scheme of the invention, the intramedullary nail structure comprises a first fixing nail, a second fixing nail and a first flexible connector, wherein the first fixing nail and the second fixing nail are connected together through the first flexible connector and can move relatively. Through above-mentioned structure, can make the joint can the relative activity when fixing patient's joint, satisfy patient's normal physiological activity, help the patient to carry out the rehabilitation training in early stage, improve recovered effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a cross-sectional view of an intramedullary nail structure provided in accordance with an embodiment of the present invention;

FIG. 2 illustrates a schematic diagram of an intramedullary nail structure provided in accordance with an embodiment of the present invention;

FIG. 3 illustrates a perspective view of the first staple of FIG. 1;

FIG. 4 shows a cross-sectional view of the first staple of FIG. 1;

FIG. 5 shows a perspective view of the second staple of FIG. 1;

FIG. 6 shows a cross-sectional view of the second staple of FIG. 1;

FIG. 7 shows a schematic diagram of the first flexible connector of FIG. 1;

FIG. 8 illustrates an enlarged view of the junction of a first staple and a second staple provided in accordance with an embodiment of the present invention;

FIG. 9 illustrates a perspective view of the third staple of FIG. 1;

FIG. 10 shows a cross-sectional view of the third staple of FIG. 1.

Wherein the figures include the following reference numerals:

10. a first staple; 11. a first mounting hole; 20. a second staple; 21. a second mounting hole; 22. an annular boss; 30. a first flexible connector; 31. a first stage; 32. a second stage; 33. a third stage; 40. a third staple; 50. a second flexible connector; 60. and a transverse locking pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, embodiments of the present application provide an intramedullary nail structure comprising: first staple 10, second staple 20 and first flexible connector 30, the first end of first flexible connector 30 is worn to establish in first staple 10 and is connected with first staple 10, and the second end of first flexible connector 30 is worn to establish in second staple 20 and is connected with second staple 20, and first staple 10 and second staple 20 can relative activity through first flexible connector 30. So can fuse first staple 10 and second staple 20 behind the skeleton, make the joint that first staple 10 and second staple 20 fuse can move about at the certain limit, make the patient can normally move about, avoid causing because the unable activity of joint that the joint is unusual to oppress, adjacent joint burden subaerial problem emergence. In this embodiment, the first fixation pin 10 is configured for fusion attachment to the tibia and the second fixation pin 20 is configured for fusion attachment to the talus.

Through the technical scheme provided by the application, the first fixing nail 10 and the second fixing nail 20 are connected together through the first flexible connecting body 30 and can move relatively. Through above-mentioned structure, can make the joint can the relative activity when fixing patient's joint, satisfy patient's normal physiological activity, help the patient to carry out the rehabilitation training in early stage, improve recovered effect. The scheme has simple structure and low installation and manufacturing cost.

As shown in FIGS. 3 to 6, the first fixing nail 10 has a first mounting hole 11, the second fixing nail 20 has a second mounting hole 21, a first end of the first flexible connecting body 30 is fixed in the first mounting hole 11, and a second end of the first flexible connecting body 30 is movably disposed in the second mounting hole 21. Through the structure, the second fixing nail 20 and the first fixing nail 10 can have relative displacement, so that the joint can move in the displacement range, and the joint treatment is ensured and the joint movement requirement is met.

Wherein, the first flexible connecting body 30 can be fixed in the first mounting hole 11 by injection molding.

In this embodiment, a position-limiting structure is disposed between the second end of the first flexible connecting body 30 and the second mounting hole 21. The maximum displacement of the first flexible connecting body 30 and the second fixing nail 20 can be limited by arranging the limiting structure, and the first flexible connecting body 30 is prevented from being separated from the second fixing nail 20, so that the first fixing nail 10 and the second fixing nail 20 are prevented from being connected and losing efficacy.

Specifically, the second mounting hole 21 has a tapered hole section, and the diameter of the tapered hole section is gradually increased from the second fixing nail 20 to the first fixing nail 10, and the tapered hole section is matched with the second end of the first flexible connecting body 30 for limitation. The maximum displacement of the first flexible connector 30 is limited by the tapered hole section, and the flexible connector is simple in structure and convenient to design.

As shown in FIG. 7, first flexible connector 30 has a first section 31, a second section 32, and a third section 33 connected to each other, where the first section 31 and the second section 32 are in a stepped configuration, the first section 31 has a diameter larger than the second section 32, and the third section 33 has a diameter that gradually increases away from the first section 31. The third section 33 can be set to be a conical structure for limiting, in this embodiment, a conical hole section is arranged in the second mounting hole 21, the third section of the first flexible connector 30 is also set to be a conical structure, and the conical hole section and the third section are set to be adaptive structures, so that the second fixing nail 20 can be effectively connected with the first flexible connector 30, and relative displacement between the second fixing nail 20 and the first flexible connector can be realized.

Wherein, a thread structure is arranged between the first fixing nail 10 and the second fixing nail 20, and the first fixing nail 10 and the second fixing nail 20 can be connected and fixed through the thread structure. Through setting up helicitic texture, can be convenient for fix first staple 10 and second staple 20 at the installation initial stage, guarantee the relative position of first staple 10 and second staple 20 when the installation, after the installation at first staple 10 and second staple 20 unscrew to make the two can relative activity.

As shown in fig. 8, one end of the first fixing hole 11 close to the second fixing nail 20 has an internal thread, the end of the second fixing nail 20 having the second fixing hole 21 is provided with an annular boss 22, the annular boss 22 is provided with an external thread, and the internal thread and the external thread constitute a thread structure. Its simple structure of above-mentioned design is convenient for production and processing.

As shown in fig. 9 and 10, the intramedullary nail structure further includes a third fixing nail 40 and a second flexible connector 50, a first end of the second flexible connector 50 is inserted into the second fixing nail 20 and connected to the second fixing nail 20, a second end of the second flexible connector 50 is inserted into the third fixing nail 40 and connected to the third fixing nail 40, and the second fixing nail 20 and the third fixing nail 40 can move relatively through the second flexible connector 50. In this embodiment, the third staple 40 is used in a fusion connection with the calcaneus bone. By additionally arranging the third fixing nail 40 and the second flexible connector 50, the length of the intramedullary nail structure can be enlarged, and further the treatment length of the skeleton can be enlarged so as to meet the requirements of different joint treatments.

Specifically, a third mounting hole is formed in one end of the second fixing nail 20, which is far away from the first fixing nail 10, a fourth mounting hole is formed in an end portion of the third fixing nail 40, a first end of the second flexible connector 50 is fixed in the third mounting hole, and a second end of the second flexible connector 50 is movably arranged in the fourth mounting hole. For convenience of design and processing, the structure of the third mounting hole may be the same as the structure of the first mounting hole 11, the structure of the fourth mounting hole may be the same as the structure of the second mounting hole 21, and the first flexible connecting body 30 and the second flexible connecting body 50 may be the same.

Wherein, the intramedullary nail structure further comprises a transverse locking nail 60, and the transverse locking nail 60 is arranged on the first fixing nail 10 and the second fixing nail 20 in a penetrating way. The strength of the connection between the staple and the bone can be improved by providing the cross locking pin 60.

The first fixing nail 10, the second fixing nail 20 and the third fixing nail 40 are generally made of a medical titanium alloy material, and the first flexible connecting body 30 and the second flexible connecting body 50 are made of a flexible biological material. In this embodiment, the first flexible connector 30 and/or the second flexible connector 50 are made of a polycarbonate polyurethane material. The composite material has good strength, certain flexibility and elasticity, and can meet certain elastic deformation. The requirements of relative movement are satisfied while the first fixing nail 10 and the second fixing nail 20, and the second fixing nail 20 and the third fixing nail 40 are connected.

Through the intramedullary nail structure that this application provided, its simple structure, design and low in manufacturing cost fuse the back with the skeleton, can satisfy articular normal activity, avoid because the joint is fixed and cause to reply slow, adjacent joint wearing and tearing, pathological change scheduling problem, have improved treatment and postoperative response effect.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intramedullary nail structure, comprising: the fixing structure comprises a first fixing nail (10), a second fixing nail (20) and a first flexible connector (30), wherein the first end of the first flexible connector (30) is arranged in the first fixing nail (10) in a penetrating mode and connected with the first fixing nail (10), the second end of the first flexible connector (30) is arranged in the second fixing nail (20) in a penetrating mode and connected with the second fixing nail (20), and the first fixing nail (10) and the second fixing nail (20) can move relatively through the first flexible connector (30).

2. The intramedullary nail structure of claim 1, wherein the first fixation nail (10) has a first mounting hole (11), the second fixation nail (20) has a second mounting hole (21), a first end of the first flexible connector (30) is fixed within the first mounting hole (11), and a second end of the first flexible connector (30) is movably disposed within the second mounting hole (21).

3. The intramedullary nail structure of claim 2, wherein a stop structure is provided between the second end of the first flexible connector (30) and the second mounting hole (21).

4. The intramedullary nail structure according to claim 3, characterized in that the second mounting hole (21) has a tapered hole section with a diameter gradually increasing from the second fixation nail (20) to the first fixation nail (10), the tapered hole section cooperating with the second end of the first flexible connector (30) for limiting.

5. The intramedullary nail structure according to claim 1, wherein the first flexible connector (30) has a first section (31), a second section (32) and a third section (33) connected to each other, the first section (31) and the second section (32) having a stepped configuration, the first section (31) having a diameter greater than the second section (32), the third section (33) having a diameter that increases away from the first section (31).

6. Intramedullary nail structure according to claim 2, characterized in that between said first (10) and said second (20) fixation nail there is a threaded structure by which said first (10) and second (20) fixation nails can be fixed in connection.

7. Intramedullary nail structure according to claim 6, characterized in that the end of the first mounting hole (11) close to the second fixation nail (20) is internally threaded, the end of the second fixation nail (20) having the second mounting hole (21) is provided with an annular boss (22), the annular boss (22) is provided with an external thread, the internal thread and the external thread constituting the threaded structure.

8. The intramedullary nail structure according to claim 1, further comprising a third fixing nail (40) and a second flexible connector (50), wherein a first end of the second flexible connector (50) is inserted into the second fixing nail (20) and connected with the second fixing nail (20), a second end of the second flexible connector (50) is inserted into the third fixing nail (40) and connected with the third fixing nail (40), and the second fixing nail (20) and the third fixing nail (40) are relatively movable through the second flexible connector (50).

9. The intramedullary nail structure according to claim 1, further comprising a cross locking nail (60), the cross locking nail (60) being pierced on each of the first fixation nail (10) and the second fixation nail (20).

10. Intramedullary nail structure according to claim 8, characterized in that the first flexible connector (30) and/or the second flexible connector (50) are made of polycarbonate polyurethane material.