CN217472047U

CN217472047U - Ulna intramedullary nail

Info

Publication number: CN217472047U
Application number: CN202220281386.8U
Authority: CN
Inventors: 谭翔; 李阳阳
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-09-23
Anticipated expiration: 2032-02-11

Abstract

The utility model provides an ulna intramedullary nail, which comprises a main nail, wherein the main nail comprises a proximal section, a transition section and a distal section which are connected in sequence, and the cross sections of the proximal section, the transition section and the distal section are all round or oval; the near end section is provided with a first interlocking hole and a second interlocking hole in a penetrating manner, and the first interlocking hole and the second interlocking hole are intersected in the near end section; the area of the near-end section, which is close to the transition section, is provided with a locking nail hole which is arranged along the radial direction of the near-end section in a penetrating way; the main nail is provided with an anti-rotation groove arranged along the longitudinal direction. The utility model aims to provide an ulna intramedullary nail to be suitable for the operation of ulna fracture surgery, overcome the not strong problem of the intramedullary nail anti-rotation nature of present use, improve the fixed effect of ulna intramedullary nail.

Description

Ulna intramedullary nail

Technical Field

The utility model belongs to the technical field of orthopedics internal fixation instrument, in particular to an ulna intramedullary nail.

Background

In the ulna fracture treatment surgical operation, an intramedullary nail with an internal implant with good biocompatibility and high strength is arranged in the medullary cavity at the far end and the near end of a broken bone. Not only can achieve the purpose of connecting and fixing the fractured ends, but also can avoid the pain of external fixation for patients, reduce wounds and carry out functional exercise in the early stage of medical treatment, so that the intramedullary nail is widely applied to clinical practice. The ulna intramedullary nail is the intramedullary nail applied to ulna fracture. The traditional ulna intramedullary nail has the technical problems of complex structure, low safety performance, low tensile strength and unstable fixation.

In view of the above, there is a need for an ulnar intramedullary nail to improve stability and safety of ulnar fracture fixation.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to an ulna intramedullary nail suitable for an ulna fracture surgery to improve the fixation stability and safety of the ulna intramedullary nail.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an ulna intramedullary nail comprises a main nail, wherein the main nail comprises a proximal section, a transition section and a distal section which are sequentially connected, and the cross sections of the proximal section, the transition section and the distal section are all circular or elliptical; the proximal end section is provided with a first interlocking hole and a second interlocking hole in a penetrating manner, and the first interlocking hole and the second interlocking hole are intersected in the proximal end section; the area of the near end section, which is close to the transition section, is provided with a locking nail hole which is arranged along the radial direction of the near end section in a through way; the main nail is provided with an anti-rotation groove arranged along the longitudinal direction.

As a preferable mode of the above intramedullary nail, the anti-rotation groove is a through groove extending from the transition section to the distal end of the distal section.

As a preferable scheme of the ulnar intramedullary nail, outlets of the first interlocking hole and the second interlocking hole are communicated to form a converging groove.

As a preferable scheme of the ulna intramedullary nail, internal threads are arranged in the locking nail hole.

As a preferable scheme of the above ulna intramedullary nail, the number of the locking nail holes is two or more, and the adjacent locking nail holes are arranged in parallel.

As a preferable mode of the above intramedullary nail, an angle between an axis of the first interlocking hole and an axis of the proximal section and an angle between an axis of the second interlocking hole and an axis of the proximal section both range from 20 ° to 30 °.

As a preferable mode of the above intramedullary nail, the proximal section and the distal section are disposed at an angle.

As a preferred embodiment of the above intramedullary nail, the distal segment has an angle ranging from 3 ° to 5 ° with respect to the proximal segment.

As a preferable proposal of the intramedullary nail for ulna, the diameter of the locking nail hole is 3 mm.

As a preferable scheme of the ulnar intramedullary nail, the distal end of the distal section is provided with an implantation slope, and the implantation slope is a plane which forms an included angle with the axis of the distal section.

Compared with the prior art, the ulna intramedullary nail of the utility model has the following advantages:

the proximal end section of the ulna intramedullary nail of the utility model is provided with a first interlocking hole and a second interlocking hole, so that the interlocking hole for the interlocking nail to be implanted can be selected according to the fracture condition, thereby avoiding the rotation of the main nail and improving the fixed connection effect of the ulna and the main nail; in addition, the proximal section is provided with a locking nail hole, and the axes of the locking nail hole and the interlocking hole are not parallel, so that the fixing and anti-rotation effects of the main nail are increased; the main nail is also provided with an anti-rotation groove, so that bone in the medullary cavity enters the anti-rotation groove, the rotation of the main nail is avoided, the fixing effect of the ulna intramedullary nail is ensured, and the healing effect of the ulna fracture is ensured.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of an ulnar intramedullary nail according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the ulnar intramedullary nail of the present invention;

fig. 3 is a cross-sectional view of a proximal end section according to an embodiment of the present invention;

description of the reference numerals:

1-a proximal segment; 2-a transition section; 3-a distal segment; 4-first interlocking hole; 5-a second interlocking hole; 6-an intersection groove; 7-locking nail holes; 8, implanting into the slope; 9-anti-rotation groove.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1-3, the present embodiment provides an ulnar intramedullary nail comprising a main nail, wherein the main nail comprises a proximal section 1, a transition section 2 and a distal section 3 which are connected in sequence, and the cross sections of the proximal section 1, the transition section 2 and the distal section 3 are all circular or elliptical; the proximal section 1 is provided with a first interlocking hole 4 and a second interlocking hole 5 in a penetrating manner, and the first interlocking hole 4 and the second interlocking hole 5 are intersected in the proximal section 1; the area of the proximal section 1 close to the transition section 2 is provided with a locking nail hole 7, and the locking nail hole 7 is arranged along the radial direction of the proximal section 1 in a penetrating way; the main spike is provided with a longitudinally disposed anti-rotation slot 9.

In the ulnar intramedullary nail in the embodiment, the first interlocking hole 4 and the second interlocking hole 5 are arranged at the proximal end section 1, so that the interlocking holes in which the interlocking nails are implanted can be selected according to the fracture condition, the rotation of the main nail is avoided, and the fixed connection effect of the ulna and the main nail is improved; in addition, the proximal section 1 is provided with a locking nail hole 7, and the axes of the locking nail hole 7 and the interlocking hole are not parallel, so that the fixing and anti-rotation effects of the main nail are increased; the main nail is also provided with an anti-rotation groove 9, so that bone in the medullary cavity enters the anti-rotation groove 9, the rotation of the main nail is avoided, the fixing effect of the ulna intramedullary nail is ensured, and the healing effect of the ulna fracture is ensured.

In this embodiment, the anti-rotation slot 9 is a through slot extending from the transition section 2 to the distal end of the distal section 3. Therefore, the proximal section 1 in the embodiment is anti-rotation and fixed through the interlocking nail and the locking nail, and the transition section 2 and the distal section 3 are anti-rotation through the through groove, so that the overall anti-rotation and fixing effects in the length direction of the main nail are ensured.

The outlets of the first and second interlocking

holes

4 and 5 are communicated to form a meeting groove 6. The angle between the axis of the first interlocking hole 4 and the axis of the proximal section 1 and the angle between the axis of the first interlocking hole 4 and the axis of the proximal section 1 both range from 20 ° to 30 °.

In this embodiment, set up the internal thread in lock nail hole 7, lock nail hole 7 and lock nail threaded connection avoid taking place to move back the nail, fixed main nail and ulna that can be better.

The number of the lock pin holes 7 is two or more, and the adjacent lock pin holes 7 are arranged in parallel. The diameter of the locking pin hole 7 is 3 mm. In other embodiments, the adjacent locking pin holes 7 can be not parallel to each other, so as to achieve better anti-rotation effect.

The proximal section 1 is arranged at an angle to the distal section 3. The included angle between the distal section 3 and the proximal section 1 ranges from 3 degrees to 5 degrees and can be matched with the shape of an ulna medullary cavity, so that the main nail implanted in the operation is not easy to deform.

In this embodiment, the implantation slope 8 is disposed at the end of the distal segment 3, and the implantation slope 8 is a plane disposed at an included angle with the axis of the distal segment 3. Set up at the end of distal end section 3 and implant domatic 8, the end of distal end section 3 is the wedge, can be so that when the main nail is implanted inserting the marrow chamber more smoothly.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ulnar intramedullary nail comprising a main nail characterized in that: the main nail comprises a proximal section (1), a transition section (2) and a distal section (3) which are connected in sequence, wherein the cross sections of the proximal section (1), the transition section (2) and the distal section (3) are all circular or oval; the proximal section (1) is provided with a first interlocking hole (4) and a second interlocking hole (5) in a penetrating manner, and the first interlocking hole (4) and the second interlocking hole (5) are intersected in the proximal section (1); the area of the proximal section (1) close to the transition section (2) is provided with a locking nail hole (7), and the locking nail hole (7) is arranged in a penetrating manner along the radial direction of the proximal section; the main nail is provided with an anti-rotation groove (9) arranged along the longitudinal direction.

2. The ulnar intramedullary nail of claim 1, wherein: the anti-rotation groove (9) is a through groove extending from the transition section (2) to the end of the distal section (3).

3. The ulnar intramedullary nail of claim 1, wherein: the outlets of the first interlocking hole (4) and the second interlocking hole (5) are communicated to form an intersection groove (6).

4. The ulnar intramedullary nail of claim 1, wherein: internal threads are arranged in the lock pin hole (7).

5. The ulnar intramedullary nail of claim 4, wherein: the number of the lock nail holes (7) is two or more, and the adjacent lock nail holes (7) are arranged in parallel.

6. The ulnar intramedullary nail of claim 1, wherein: the included angle between the axis of the first interlocking hole (4) and the axis of the proximal section (1) and the included angle between the axis of the second interlocking hole (5) and the axis of the proximal section (1) are both 20-30 degrees.

7. The ulnar intramedullary nail of claim 1, wherein: the proximal section (1) and the distal section (3) are arranged at an included angle.

8. The ulnar intramedullary nail of claim 7, wherein: the distal section (3) and the proximal section (1) form an angle in the range of 3 DEG to 5 deg.

9. The ulnar intramedullary nail of claim 1, wherein: the diameter of the lock pin hole (7) is 3 mm.

10. The ulnar intramedullary nail of claim 1, wherein: an implantation slope surface (8) is arranged at the tail end of the distal section (3), and the implantation slope surface (8) is a plane arranged at an included angle with the axis of the distal section (3).