CN210130908U

CN210130908U - Intramedullary nail internal fixation device for femoral fracture operation

Info

Publication number: CN210130908U
Application number: CN201920253200.6U
Authority: CN
Inventors: 张海龙; 刘新晖; 殷建; 葛雨庆
Original assignee: Nanjing Jiangning Hospital
Current assignee: Nanjing Jiangning Hospital
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-03-10
Anticipated expiration: 2029-02-28

Abstract

The utility model relates to the technical field of machinery, specifically be an intramedullary nail internal fixation device for femoral fracture operation, including the intramedullary nail, the terminal body of rod surface that the intramedullary nail kept away from implanted end is equipped with first external screw thread, has seted up the screw hole that a plurality of and external world are linked together in the intramedullary nail, and screw hole female connection has fastening screw, and the top of intramedullary nail still is equipped with the rupture connecting rod of two mutual symmetries, is equipped with the arc that is vertical form and distributes on the rupture connecting rod, and the surface of arc is equipped with the second external screw thread, and the rotation of second external screw thread is the same with the rotation of first external screw thread to. The utility model is simple in operation, convenient to use can avoid the intramedullary nail to implant the phenomenon emergence that the tail cap that causes the intramedullary nail near-end twists the difficulty deeply to improve rescue efficiency.

Description

Intramedullary nail internal fixation device for femoral fracture operation

Technical Field

The utility model relates to the technical field of machinery, in particular to an intramedullary nail internal fixation device for femoral fracture surgery.

Background

The femoral fracture is a common lower limb fracture in clinic, the first treatment method is closed reduction internal fixation, and the first treatment method is femoral intramedullary nail fixation during internal fixation, but after the traditional intramedullary nail is implanted, the situation that the tail cap at the proximal end of the intramedullary nail is difficult to screw due to the fact that the intramedullary nail is implanted too deeply can occur, and the rescue time is further delayed. In view of this, we propose an intramedullary nail internal fixation device for femoral fracture surgery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intramedullary nail internal fixation device for femoral fracture operation to after solving the traditional intramedullary nail implantation that proposes in the above-mentioned background art, probably take place the intramedullary nail and implant the tail cap that leads to the fact the intramedullary nail near-end and twist the difficulty deeply, further hinder the problem of rescue time.

In order to achieve the above object, the utility model provides a following technical scheme:

an intramedullary nail internal fixation device for femoral fracture surgery comprises an intramedullary nail, wherein a first external thread is arranged on the surface of a tail end rod body of the intramedullary nail far away from an implanted end, a plurality of threaded holes communicated with the outside are formed in the intramedullary nail, and fastening screws are connected with internal threads of the threaded holes;

the intramedullary nail is characterized in that two symmetrical fracture connecting rods are further arranged at the top end of the intramedullary nail, the cross sections of the fracture connecting rods are arc-shaped, arc-shaped plates which are distributed in a vertical mode are arranged on the fracture connecting rods, second external threads are arranged on the surfaces of the arc-shaped plates, and the rotating direction of the second external threads is the same as that of the first external threads.

Preferably, the diameter of the concentric circle of the cross section of the broken connecting rod is smaller than that of the cross section circle of the intramedullary nail.

Preferably, the diameter of the concentric circle of the cross section of the arc-shaped plate is equal to the diameter of the cross section circle of the intramedullary nail.

Preferably, the top surface of the arc-shaped plate is also provided with a plurality of connecting bulges, and the connecting bulges are provided with sealing covers.

Preferably, the annular side surface of the sealing cover is provided with a third external thread, the sealing cover is further provided with a cross groove, and the sealing cover is internally provided with a through hole communicated with the outside.

Preferably, an annular groove communicated with the outside is formed in one side face of the intramedullary nail provided with the broken connecting rod, and internal threads are formed in the groove wall of the annular groove.

Preferably, the third external thread is in threaded connection with the internal thread.

Preferably, the diameter of a concentric circle where the section of the broken connecting rod is located is smaller than the aperture of the through hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a rupture connecting rod and arc that set up, after implanting the intramedullary nail, the arc still is located the marrow outside, makes the tail cap on the intramedullary nail twist simple that becomes on the one hand, and on the other hand, after the intramedullary nail implantation is accomplished, can be external with the light rupture of the fracture connecting rod part on the intramedullary nail, and then shorten the operation time, solved traditional intramedullary nail implantation back, the tail cap that the intramedullary nail implantation is too deep to cause the intramedullary nail near-end twists the difficulty, further hinders the problem of rescue time.

2. The utility model discloses a sealed lid that sets up, when using, take off sealed lid from the arc, be about to connect protruding rupture, make the alternate segregation between sealed lid and the arc, twist sealed lid in the ring channel again, thereby realize the connecting rod protection of will breaking inside it, avoid because the connecting rod of breaking is after the rupture, its surface is sharp more, cause the puncture to patient's marrow, the intramedullary nail internal fixation device who has generally been used for the femoral fracture operation has comparatively sharp edges and corners, can cause the problem of puncture to the patient when using.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural view of an intramedullary nail (in use) according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 4 is an exploded view of embodiment 2 of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 4 according to the present invention;

fig. 6 is a schematic structural view of embodiment 3 of the present invention;

fig. 7 is an enlarged view of the present invention at B in fig. 6;

fig. 8 is an enlarged view of the present invention at C in fig. 7;

fig. 9 is a schematic structural view of the sealing cover of the present invention.

In the figure: 1. intramedullary nails; 1a, an implantation end; 10. a first external thread; 11. a threaded hole; 12. fastening screws; 2. breaking the connecting rod; 3. an arc-shaped plate; 30. a second external thread; 4. a connecting projection; 5. a sealing cover; 50. a third external thread; 51. a cross groove; 52. a through hole; 6. an annular groove; 60. an internal thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example 1

An intramedullary nail internal fixation device for femoral fracture surgery, as shown in fig. 1 and fig. 2, comprises an intramedullary nail 1, wherein a first external thread 10 is arranged on the surface of a rod body at the tail end of the intramedullary nail 1 far away from an implantation end 1a, a plurality of threaded holes 11 communicated with the outside are arranged in the intramedullary nail 1, and fastening screws 12 are connected with the internal threads of the threaded holes 11.

In this embodiment, the entire intramedullary nail 1 is made of stainless steel, which has high hardness and does not rust, and can achieve a good fixation effect when implanted into bone marrow.

Specifically, the fastening screw 12 is provided with a cross-shaped groove, which facilitates the use of an external cross screwdriver to tighten the fastening screw 12.

Example 2

In the concrete operation, in order to avoid the difficulty in screwing the tail cap at the proximal end of the intramedullary nail caused by the over-deep implantation of the intramedullary nail, therefore, the intramedullary nail 1 is improved on the basis of the embodiment 1, as a preferred embodiment, as shown in fig. 3 to 5, the top end of the intramedullary nail 1 is further provided with two mutually symmetrical broken connecting rods 2, the cross section of the broken connecting rods 2 is arc-shaped, the broken connecting rods 2 are provided with arc-shaped plates 3 distributed in a vertical shape, the surface of the arc-shaped plates 3 is provided with second external threads 30, and the rotation direction of the second external threads 30 is the same as the rotation direction of the first external threads 10.

In this embodiment, the thickness of the break connecting rod 2 is relatively thin, and when the arc-shaped plate 3 is rotated, the break connecting rod 2 does not break, and when the arc-shaped plate 3 is pressed toward one direction by the acting force, the break connecting rod 2 breaks, so that the arc-shaped plate 3 is separated from the break connecting rod 2.

Specifically, the diameter of the concentric circle where the cross section of the fracture connecting rod 2 is located is smaller than that of the cross section circle of the intramedullary nail 1, so that the fracture connecting rod 2 can be fractured better under the external acting force.

Furthermore, the diameter of the concentric circle of the cross section of the arc-shaped plate 3 is equal to the diameter of the cross section circle of the intramedullary nail 1, so that the intramedullary nail 1 can be conveniently implanted into bone marrow by rotating the arc-shaped plate 3.

In the embodiment, the arc-shaped plate 3 is arranged on the intramedullary nail 1, the arc-shaped plate 3 is rotated to implant the intramedullary nail 1 into bone marrow of a patient, meanwhile, the arc-shaped plate 3 is an extension part on the intramedullary nail 1, and after the intramedullary nail 1 is integrally implanted into the bone marrow, the fracture connecting rod 2 part on the intramedullary nail 1 can be easily fractured in vitro, so that the operation time is shortened, and the problems that the tail cap at the near end of the intramedullary nail is difficult to screw due to the fact that the intramedullary nail is implanted too deeply and the rescue time is further delayed after the traditional intramedullary nail is implanted are solved.

Example 3

In the specific operation, in order to avoid that the broken part of the broken connecting rod 2 is too sharp and causes puncture injury to bone marrow of a patient, therefore, the intramedullary nail 1 and the arc-shaped plate 3 are improved on the basis of the embodiment 2, as a preferred embodiment, as shown in fig. 6 to 9, the top surface of the arc-shaped plate 3 is further provided with a plurality of connecting protrusions 4, the connecting protrusions 4 are provided with sealing covers 5, the annular side surfaces of the sealing covers 5 are provided with third external threads 50, the sealing covers 5 are further provided with cross grooves 51, the sealing covers 5 are internally provided with through holes 52 communicated with the outside, one side surface of the intramedullary nail 1 provided with the broken connecting rod 2 is provided with an annular groove 6 communicated with the outside, the groove wall of the annular groove 6 is provided with internal threads 60, and the third external threads 50 are in.

In this embodiment, connect all close welding between protruding 4 and the arc 3 and sealed lid 5, through the protruding 4 of connection that sets up, play and fix sealed lid 5 on arc 3, because the volume of connecting protruding 4 is less, when needs, can break off sealed lid 5 and arc 3 from the part of connecting protruding 4, make sealed lid 5 break away from arc 3.

Specifically, the diameter of the cross-section circle of the sealing cover 5 is smaller than that of the cross-section circle of the intramedullary nail 1, so that the sealing cover 5 is ensured not to influence the normal implantation of the intramedullary nail 1 into the bone marrow of a patient and not to influence the normal rotation of the arc-shaped plate 3.

Furthermore, the diameter of the concentric circle of the cross section of the broken connecting rod 2 is smaller than the aperture of the through hole 52, so that the sealing cover 5 just protects the broken connecting rod 2 inside the sealing cover 5 when the sealing cover 5 is screwed into the annular groove 6, and the broken connecting rod 2 is prevented from being exposed to the outside and causing puncture injury to bone marrow of a patient after being broken.

In the embodiment, through the sealed lid 5 that sets up, when using, break sealed lid 5 along connecting 4 parts from arc 3, twist sealed lid 5 into annular groove 6 again, and screw up sealed lid 5, at this moment, sealed lid 5 just protects arc 3 inside it, break connecting rod 2 after avoiding breaking exposes outside, cause the stab to patient's marrow, and when taking out, use external cross bottle opener with sealed lid 5 unscrew can, comparatively sharp edges and corners has been solved on the intramedullary nail internal fixation device who is used for the femoral fracture operation generally, can cause the problem of stab to the patient when using.

Before the intramedullary nail internal fixation device for femoral fracture operation is used, a corresponding hole and a threaded hole through which a fastening screw 12 can pass are drilled in the bone marrow of a patient;

when in use, the arc-shaped plate 3 is rotated to implant the intramedullary nail 1 into the marrow of a patient, the fastening screw 12 is screwed into the threaded hole and the threaded hole 11 in the marrow, meanwhile, because the arc-shaped plate 3 is the extension part on the intramedullary nail 1, after the intramedullary nail 1 is integrally implanted into the marrow, the broken connecting rod 2 part on the intramedullary nail 1 can be easily broken outside the body, further, the sealing cover 5 is broken off from the arc-shaped plate 3 along the connecting bulge 4 part, then the sealing cover 5 is screwed into the annular groove 6 and the sealing cover 5 is screwed tightly, at the moment, the sealing cover 5 protects the arc-shaped plate 3 inside the sealing cover, the broken connecting rod 2 after being broken is prevented from being exposed outside to cause puncture injury to the marrow of the patient, the problem that the tail cap at the near end of the intramedullary nail is difficult to screw because the intramedullary nail is implanted too deeply is solved, further delaying the rescue time.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An intramedullary nail internal fixation device for femoral fracture surgery, comprising an intramedullary nail (1), characterized in that: the surface of the tail end rod body of the intramedullary nail (1) far away from the implantation end (1a) is provided with a first external thread (10), a plurality of threaded holes (11) communicated with the outside are formed in the intramedullary nail (1), and fastening screws (12) are connected with the internal threads of the threaded holes (11);

the top of intramedullary nail (1) still is equipped with two mutual symmetry's fracture connecting rod (2), the cross-section of fracture connecting rod (2) is the arc, be equipped with arc (3) that are vertical form and distribute on fracture connecting rod (2), the surface of arc (3) is equipped with second external screw thread (30), the direction of turning of second external screw thread (30) with the direction of turning to of first external screw thread (10) is the same.

2. The intramedullary nail internal fixation device for femoral fracture surgery of claim 1, wherein: the diameter of a concentric circle where the cross section of the broken connecting rod (2) is located is smaller than that of the cross section circle of the intramedullary nail (1).

3. The intramedullary nail internal fixation device for femoral fracture surgery of claim 1, wherein: the diameter of a concentric circle where the cross section of the arc-shaped plate (3) is located is equal to the diameter of the cross section circle of the intramedullary nail (1).

4. The intramedullary nail internal fixation device for femoral fracture surgery of claim 1, wherein: the top surface of arc (3) still is equipped with a plurality of and connects arch (4), be equipped with sealed lid (5) on connecting arch (4).

5. The intramedullary nail internal fixation device for femoral fracture surgery of claim 4, wherein: the annular side surface of the sealing cover (5) is provided with a third external thread (50), the sealing cover (5) is further provided with a cross groove (51), and a through hole (52) communicated with the outside is formed in the sealing cover (5).

6. The intramedullary nail internal fixation device for femoral fracture surgery of claim 5, wherein: an annular groove (6) communicated with the outside is formed in one side face of the intramedullary nail (1) provided with the broken connecting rod (2), and an internal thread (60) is formed in the groove wall of the annular groove (6).

7. The intramedullary nail internal fixation device for femoral fracture surgery of claim 6, wherein: the third external thread (50) is in threaded connection with the internal thread (60).

8. The intramedullary nail internal fixation device for femoral fracture surgery of claim 6, wherein: the diameter of a concentric circle where the cross section of the broken connecting rod (2) is located is smaller than the aperture of the through hole (52).