CN214966492U

CN214966492U - Intramedullary nail for radius

Info

Publication number: CN214966492U
Application number: CN202120999087.3U
Authority: CN
Inventors: 王建忠; 秦艳龙; 秦政; 张力为; 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 radius intramedullary nail, which comprises a marrow fixing rod, wherein the two ends of the marrow fixing rod are respectively provided with a near end and a far end, the marrow fixing rod is of an arc structure, the near end is a combination of a cylinder formed by saw teeth and an umbrella shape, the far end is an expansion part, the far end is provided with a nail hole, a locking nail is arranged in the nail hole in a penetrating way, and the end part of the far end is provided with a connecting groove; the length of the radial intramedullary nail is 200 plus 260mm, the marrow fixing rod is of a solid cylindrical structure, the diameter of the marrow fixing rod is 3.5-5mm, and the length of the marrow fixing rod is 160 plus 220 mm; the arc of the rod at 1/3 in the radius is 10. The diameter of the distal end is 6-8mm, and the length of the distal end is 20-30 mm; the length of the proximal end is 15-25mm, and the diameter of the proximal end is 2.5-5 mm. The utility model utilizes the prism shape characteristics of the near end of the intramedullary nail and the tight pressurization of the medullary cavity to control the stability of the fracture end of the radius, thereby being beneficial to the fracture healing and improving the future life quality of the patient.

Description

Intramedullary nail for radius

Technical Field

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

Background

The radius is located on the lateral aspect of the forearm and is curved, which plays an important role in the rotational movement of the forearm. When an accident occurs, the radius is usually fractured due to direct violence, indirect violence and torsional violence, if the function of the radius cannot be seriously affected in time and correctly treated, and complications such as traumatic arthritis and the like can occur in the later period. Thus, for radial fractures, strict standards should be applied in time for treatment with the goal of maintaining axial stability, rotational stability, and bone length. In the existing treatment mode, the intramedullary nail adopts the characteristic of minimally invasive incision intramedullary fixation, and has gradually become the treatment mode favored by clinicians, and the technology has the main advantages of small wound, short operation time, beautiful appearance, quick postoperative recovery and the like.

The intramedullary nails currently in use mainly include cross-locking intramedullary nails and elastic intramedullary nails, however, these two intramedullary nails have significant disadvantages.

1. The interlocking intramedullary nail is easy to damage the radial nerve after being arranged and placed due to the arrangement of the proximal locking nail, and the interlocking intramedullary nail has high requirements on technology and equipment, and is not enough for operating doctors to contact excessive radioactive rays, easily broken nails and the like; 2. elastic intramedullary nail: the most remarkable defects are that the contact area of the intramedullary nail and the medullary cavity is not ideal, the intramedullary nail can not well adapt to the anatomical form of the radius and can not be pressurized and fixed, and when the forearm rotates, the stability of the fracture end is difficult to control only by the intramedullary nail, so that the fixation effect is not ideal.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a radius intramedullary nail combines radius form and medullary cavity internal diameter characteristics, designs into the shape that cylinder and umbrella-type that the cockscomb structure is constituteed with the near-end of intramedullary nail combine together, utilizes the prismatic shape characteristics of intramedullary nail and controls the stability of radius fracture end with the inseparable pressurization in medullary cavity to do benefit to fracture healing, improve patient's quality of life in the future.

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

the utility model provides an intramedullary nail of radius, includes the marrow dead lever, the both ends of marrow dead lever are equipped with near-end and distal end respectively, its characterized in that: the marrow fixed link is the arc structure, the near-end is the cylinder and the umbrella-type combination that the cockscomb structure is constituteed, the distal end is the inflation part, just seted up the nail hole on the distal end, wear to be equipped with distal end lock nail in the nail hole, the tip of distal end is equipped with the spread groove.

Further, the total length of the intramedullary nail is 200 mm and 260 mm.

Furthermore, the marrow fixing rod is of a solid cylindrical structure or a solid plum blossom-shaped structure in cross section, the diameter of the marrow fixing rod is 3.5-5mm, and the length of the marrow fixing rod is 160-220 mm.

Further, the intramedullary fixation rod has an arc of 10 ° at a location spaced from the distal end 1/3.

Further, the diameter of the distal end is 6-8mm, and the length of the distal end is 20-30 mm.

Further, the length of the proximal end is 15-25mm, the diameter of the proximal end is 2.5-5mm, and the diameter of the joint of the proximal end and the marrow fixing rod is the same as that of the marrow fixing rod.

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

1. the near end of the intramedullary nail of the utility model is in the shape of a cylinder formed by saw teeth and an umbrella shape, the unique saw tooth umbrella cap-shaped head end is convenient to be placed without expanding marrow, the friction force between the near end and the marrow cavity is increased, and the rotational stability of the radius can be well controlled;

2. the radius intramedullary nail of the utility model has no near-end locking nail, only the locking nail is arranged at the far-end, which can avoid the risk of radial nerve damage caused by the insertion of the near-end locking nail, but because the head end of the product is designed into a sawtooth type, the strong fixing effect similar to that of the interlocking intramedullary nail after the two locking nails are inserted can be achieved;

3. the intramedullary nail marrow fixing rod of the radius of the utility model has an arc structure at the 1/3 position in the radius, has a radian of 10 degrees, can well adapt to the anatomical form of the radius, can closely pressurize with the marrow cavity after being placed, and better ensures that the fracture end does not shift when the front arm rotates after the intramedullary nail is placed;

4. the utility model does not need additional external fixation such as plaster after the operation of the radius intramedullary nail, has ideal fixing effect and is convenient for the patient to recover and live in the future.

Drawings

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

Fig. 2 is a side view of the distal structure of the present invention.

Fig. 3 is a schematic view of the structure of the proximal end of the present invention.

Fig. 4 is a side view of the proximal structure of the present invention.

Fig. 5 is a schematic structural view of the cross section of the marrow fixing rod of the present invention having a solid quincunx structure.

Fig. 6 is a schematic view of the structure of the intramedullary nail of the present invention inserted into the radius.

Wherein: 100-radius intramedullary nail, 200-radius, 1-marrow fixed rod, 2-near end, 3-far end, 4-nail hole, 5-connecting groove and 6-far end 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. 1-6, the intramedullary nail 100 includes a marrow fixing rod 1, two ends of the marrow fixing rod 1 are respectively provided with a proximal end 2 and a distal end 3, the marrow fixing rod 1 is of an arc structure, and the radian of the marrow fixing rod 1 at a position distant from the distal end 31/3 is 10 °, so that the whole intramedullary nail is also of an arc structure when viewed from the overall structure.

Further, the intramedullary fixing rod 1 is a solid cylindrical structure or a solid quincunx structure in cross section, the structure of the intramedullary fixing rod 1 with a solid quincunx structure in cross section is specifically shown in fig. 5, the diameter of the intramedullary fixing rod 1 is 3.5-5mm, and the length of the intramedullary fixing rod 1 is 160-220 mm.

The proximal end 2 is a combination of a cylinder and an umbrella which are composed of saw-toothed shapes, namely the outer surface of the proximal end 2 is of a saw-toothed structure as a whole, the diameter of the proximal end 2 is gradually reduced along the direction far away from the marrow-fixed rod 1, the length of the proximal end 2 is 15-25mm, the diameter of the proximal end 2 is 2.5-5mm, and the diameter of the joint of the proximal end 2 and the marrow-fixed rod 1 is the same as that of the marrow-fixed rod 1.

The distal end 3 is an expanded part, the diameter of the expanded part of the distal end is 6-8mm, and the length of the distal end 3 is 20-30 mm; a nail hole 4 is formed in the far end 3, a far end locking nail 6 penetrates through the nail hole 4, and a connecting groove 5 is formed in the end part of the far end 3; the locking nail 6 is a full-thread nail with the diameter of 2.5mm, and the length of the locking nail 6 is 1.0-2.5 cm; the attachment slot 5 facilitates attachment to an implantation tool.

Further, the total length of the intramedullary nail 100 is 200 and 260mm, and each difference is 10mm, so that the intramedullary nail is classified into a type; it should be noted that, since the radial intramedullary nail 100 of the present application has an overall arc-shaped structure, the length of each portion is an arc-shaped length.

Furthermore, the marrow fixing rod 1, the near end 2, the far end 3 and the locking nail 6 are made of titanium alloy materials and are manufactured in an integrated forming mode.

The utility model discloses a theory of operation: when the intramedullary nail is used, a 1.5-2cm incision is made on a Lister tubercle of the 200 styloid radius, the styloid radius is slotted by a slotting device, after the slotting, the intramedullary nail is placed into a medullary cavity by taking the proximal end 2 as an entry point, the medullary is not expanded when the intramedullary nail is placed, but a driver is adopted to slowly knock one end of the distal end 3 provided with a connecting groove 5, the intramedullary nail is driven into the medullary cavity until the proximal end 2 is placed on the tuberosity of the radius bone by 0.5-1cm, and the distal end 3 is placed on the articular surface of the wrist radius by 0.5-1 cm. After the intramedullary nail is placed, the position of the intramedullary nail is observed under X-ray, and after the position is proper, the locking nail 6 is screwed in the nail hole 4 for fixation.

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 radius, includes marrow dead lever (1), the both ends of marrow dead lever (1) are equipped with near-end (2) and distal end (3) respectively, its characterized in that: the marrow dead lever (1) is the arc structure, near-end (2) are the cylinder and the umbrella-type combination that the cockscomb structure is constituteed, distal end (3) are the inflation part, just nail hole (4) have been seted up on distal end (3), wear to be equipped with distal end lock nail (6) in nail hole (4), the tip of distal end (3) is equipped with spread groove (5).

2. The intramedullary nail of claim 1, wherein: the total length of the intramedullary nail is 200 mm and 260 mm.

3. The intramedullary nail of claim 2, wherein: the marrow fixing rod (1) is of a solid cylindrical structure or a solid plum blossom-shaped structure in cross section, the diameter of the marrow fixing rod (1) is 3.5-5mm, and the length of the marrow fixing rod (1) is 160-220 mm.

4. The intramedullary nail of claim 3, wherein: the curvature of the intramedullary fixation rod (1) at a position distant from the distal end 1/3 is 10 °.

5. The intramedullary nail of claim 2, wherein: the diameter of the far end (3) is 6-8mm, and the length of the far end (3) is 20-30 mm.

6. The intramedullary nail of claim 2, wherein: the length of the near end (2) is 15-25mm, the diameter of the near end (2) is 2.5-5mm, and the diameter of the joint of the near end (2) and the marrow fixing rod (1) is the same as that of the marrow fixing rod (1).