CN214966491U

CN214966491U - Clavicle intramedullary nail

Info

Publication number: CN214966491U
Application number: CN202120999080.1U
Authority: CN
Inventors: 王建忠; 张力为; 秦艳龙; 秦政; 谭文志; 王禹; 陆红旭; 张聿轲; 贺万雄; 裴志伟; 王田田; 刘亭亭; 孙梦虎
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-12-03
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a clavicle intramedullary nail, which comprises a marrow fixing rod, wherein the two ends of the marrow fixing rod are respectively a near end and a far end, the marrow fixing rod is of an arc structure, the cross section of the marrow fixing rod is in a solid quincunx shape, the near end of the marrow fixing rod is an expanded end, the far end of the marrow fixing rod is a tip end, the tip end is in a hexagonal pyramid shape, the end part of the near end is provided with a circular fixing hole, and a locking nail can be detachably connected in the fixing hole; the side wall of the fixing hole is provided with an internal thread; the diameter of the fixing hole is 3.5mm, and the depth of the fixing hole is 1.0 cm; the total length of the clavicle intramedullary nail is 105 mm and 125 mm; the length of the proximal expanded part is 4.5-6.5cm, and the diameter is 4-6 mm; the non-expanded part has a length of 6cm and a diameter of 3-5 mm; the radian of the marrow fixing rod at the position of the middle part near the clavicle is 30 degrees. The utility model utilizes the prism of the intramedullary nail and the tight pressurization of the medullary cavity to control the stability of the clavicle fracture end, further improves the anti-rotation stability, thereby being beneficial to the fracture healing.

Description

Clavicle intramedullary nail

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an intramedullary nail of clavicle.

Background

The clavicle belongs to a flat bone in a human body, is approximately S-shaped, the proximal sternum end is expanded and is similar to a diamond, the distal end is flat, and the clavicle and the sternum are combined. The proximal end of the clavicle and the sternum form a sternoclavicular joint, the distal end and the shoulder joint form a acromioclavicular joint, the muscle and ligament are attached to the distal end of the clavicle, and the middle segment of the clavicle can better resist tension force. The posterior margin of the proximal clavicle is attached to sternocleidomastoid muscle, and the anterior margin is attached to pectoralis major muscle^[9]. Posterior to the anterior clavicle, the inferior arteriovenous vessels and nerves. The coracoid clavicle at the far end of the clavicle is an important structure and has the function of stabilizing the shoulder joint, and the medullary cavity of the clavicle is differentIn other tubular bones, the marrow cavity is similar to a honeycomb structure and is filled with a large amount of cancellous bone, the middle clavicle section becomes the most common fracture part, the middle clavicle section is the narrowest part of the clavicle and is the junction of two radians, so the middle clavicle section is the most concentrated part of stress, so the fracture is easy to occur, the fracture caused by osteoporosis and pathological diseases is eliminated, in the past, people usually think that the clavicle fracture caused by indirect violence is larger than direct violence, but in recent years, researches find that the clavicle fracture caused by direct violence is higher than the indirect violence, and biomechanical researches show that the fracture of the middle clavicle section is mostly caused by blunt impact on shoulder peaks, and the clavicle fracture caused by the indirect violence is usually caused by outward extension of hands of patients during falling down.

The currently applied intramedullary nails are the most common titanium elastic intramedullary nails in China, and foreign countries have rockwood needles, Echidna needles and second-generation clavicle intramedullary needles CRX developed by Sonoma corporation, and domestic scholars have developed intramedullary fixation devices, clavicle interlocking intramedullary nail systems, clavicle elastic intramedullary nails, clavicle movable clavicle tail threaded intramedullary nail devices, clavicle interlocking intramedullary nails and clavicle elastic intramedullary nails. However, these intramedullary nail devices generally have poor anti-rotation capability, which leads to complications such as needle withdrawal, broken needle body, etc., and a series of complications caused by complicated design structure.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a clavicle intramedullary nail combines clavicle form and medullary cavity internal diameter characteristics, designs into the cross section with the marrow dead lever of intramedullary nail and be solid quincunx, and the most advanced design of distal end is hexagonal pyramid, utilizes the stability that the prism of intramedullary nail and the inseparable pressurization in medullary cavity come control clavicle fracture end to further improve anti rotational stability, thereby do benefit to union, make the more comprehensive recovery of patient.

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

the utility model provides an intramedullary nail of clavicle, includes the marrow dead lever, the both ends of marrow dead lever are near-end and distal end respectively, its characterized in that: the marrow fixing rod is of an arc structure, the cross section of the marrow fixing rod is in a solid plum blossom shape, the proximal end of the marrow fixing rod is an expanded end, the rest parts are non-expanded parts, the distal end of the marrow fixing rod is a tip, and the tip is in a hexagonal pyramid shape; a round fixing hole is formed in the end part of the near end, and a locking nail is detachably connected in the fixing hole; and the side wall of the fixing hole is provided with an internal thread.

Further, the diameter of the fixing hole is 3.5mm, and the depth of the fixing hole is 1.0 cm.

Further, the total length of the intramedullary nail is 105 mm and 125 mm.

Further, the proximal end of the marrow fixing rod is expanded to 4.5-6.5cm in length and 4-6mm in diameter.

Further, the non-expanded part of the marrow-fixing rod is 6cm in length, and the diameter of the far end is 3-5 mm.

Further, the radian of the marrow fixing rod at the position close to the middle section of the clavicle is 30 degrees.

Furthermore, the marrow fixing rod and the locking nail are made of titanium alloy materials.

The utility model has the advantages that: compared with the prior art, the utility model has the improvement that,

1. the clavicle intramedullary nail of the utility model has corresponding radian according to the deformation curvature of the clavicle, and has certain elasticity and plasticity, thereby being more convenient to be placed;

2. because the medullary cavity of the clavicle is different from other tubular bones, the medullary cavity of the clavicle is compact, spongy bone is filled in the medullary cavity, and the clavicle intramedullary nail medullary fixing rod of the utility model adopts a structure with a hexagonal groove, so that the intramedullary nail medullary fixing rod can be placed without expanding the medullary, the prismatic groove is tightly attached to the spongy bone in the medullary cavity, and the anti-rotation stability is improved;

3. because the proximal medullary cavity of the clavicle is the biggest part of the medullary cavity of the whole clavicle, the utility model discloses a clavicle intramedullary nail can treat that the intramedullary nail is taken out smoothly through the extractor after the fracture healing through the central lock of the proximal plum blossom surface after being put into, alleviates the injury to the surrounding tissue.

Drawings

Fig. 1 is a schematic view of the structure of the clavicle intramedullary nail of the present invention.

Fig. 2 is a schematic view of the distal end structure of the clavicle intramedullary nail of the present invention.

Fig. 3 is a side view of the distal structure of the clavicular intramedullary nail of the present invention.

Fig. 4 is a schematic view of the clavicle intramedullary nail of the present invention after being placed in the clavicle.

Wherein: 100-clavicular intramedullary nail, 200-clavicle, 1-marrow fixing rod, 2-proximal end, 3-distal end, 4-fixing hole and 5-locking nail.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to fig. 1-4, the intramedullary nail 100 includes a marrow fixing rod 1, two ends of the marrow fixing rod 1 are respectively a proximal end 2 and a distal end 3, the marrow fixing rod 1 is an arc structure, the cross section of the marrow fixing rod 1 is a solid quincunx, the proximal end 2 of the marrow fixing rod 1 is an expanded end, and the rest is a non-expanded part, that is, the proximal diameter of the marrow fixing rod 1 is greater than the diameter of the rest except the proximal end 2; the far end 3 of the marrow fixing rod 1 is a tip, the tip is in a hexagonal pyramid shape, the end part of the near end 2 is provided with a round fixing hole 4, and the side wall of the fixing hole 4 is provided with internal threads; the threaded connection of fixed orifices 4 has a lock nail 5, the diameter of fixed orifices 4 is 3.5mm, the degree of depth of fixed orifices 4 is 1.0cm, the diameter and the length of lock nail 5 all with the diameter and the length phase-match of fixed orifices 4. The fixing hole 4 is used for being matched with the locking nail 5 for fixing and is also used for being matched with a clavicle intramedullary nail extractor for extracting the clavicle intramedullary nail. Specifically, the end part of the clavicular intramedullary nail extractor is provided with an external thread matched with the thread of the fixing hole 4, when in use, the clavicular intramedullary nail 5 is firstly taken out, then the clavicular intramedullary nail extractor is screwed into the fixing hole 4, and then the clavicular intramedullary nail is taken out from the medullary cavity of the clavicle.

Further, the length of the clavicle intramedullary nail is 105-125mm, wherein the length of the expanded part at the proximal end 2 is 4.5-6.5cm, and the diameter is 4-6 mm; the length is divided into four specifications of 4.5cm, 5.0cm, 6.0cm and 6.5cm, and the diameter is divided into five specifications of 4mm, 4.5mm, 5mm, 5.5mm and 6 mm.

The length of a non-expansion part except for the expansion part 2 at the near end of the clavicle intramedullary nail is 6cm, the diameter of the non-expansion part is 3-5mm, and the clavicle intramedullary nail is divided into five specifications of 3mm, 3.5mm, 4mm, 4.5mm and 5 mm.

Further, the curvature of the intramedullary fixation rod 1 at the mesial position is 30 °.

Furthermore, the marrow fixing rod 1 and the locking nail 5 are made of titanium alloy materials, have certain elasticity and plasticity and are more convenient to put in.

The utility model discloses a theory of operation: when in use, under C-arm perspective, a needle is inserted into the proximal end of the clavicle 200, the inserted needle is kept at least 1.0-1.5cm away from the fractured bone, and after closed reduction, the clavicle intramedullary nail 100 is placed, and the clavicle nail 5 is screwed into the fixing hole 4 at the end part of the proximal end 2 to be locked; when taking out, the locking nail 5 at the end part of the near end 2 is taken down firstly, and is replaced by a locking intramedullary nail extractor, and the locking intramedullary nail extractor is screwed into the fixing hole 4, so that the locking intramedullary nail is pulled out from the medullary cavity of the locking bone.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an intramedullary nail of clavicle, includes marrow dead lever (1), the both ends of marrow dead lever (1) are near-end (2) and distal end (3) respectively, its characterized in that: the marrow fixing rod (1) is of an arc structure, the cross section of the marrow fixing rod (1) is in a solid plum blossom shape, the proximal end (2) of the marrow fixing rod (1) is an expanded end, the rest parts are non-expanded parts, the distal end (3) of the marrow fixing rod (1) is a tip, and the tip is in a hexagonal pyramid shape; a round fixing hole (4) is formed in the end part of the near end (2), and a locking nail (5) is detachably connected in the fixing hole (4); and the side wall of the fixing hole (4) is provided with internal threads.

2. The intramedullary nail of claim 1, wherein: the diameter of the fixing hole (4) is 3.5mm, and the depth of the fixing hole (4) is 1.0 cm.

3. The intramedullary nail of claim 1, wherein: the total length of the intramedullary nail is 105 mm and 125 mm.

4. The intramedullary nail of claim 3, wherein: the length of the proximal end (2) of the marrow fixing rod (1) is 4.5-6.5cm, and the diameter is 4-6 mm.

5. The intramedullary nail of claim 4, wherein: the non-expansion part of the marrow fixing rod (1) is 6cm in length and 3-5mm in diameter.

6. The intramedullary nail of claim 1, wherein: the radian of the marrow fixing rod (1) at the position close to the middle section of the clavicle is 30 degrees.

7. The intramedullary nail of claim 1, wherein: the marrow fixing rod (1) and the locking nail (5) are made of titanium alloy materials.