CN211749991U

CN211749991U - Straight type interlocking intramedullary nail of fixed humerus of multi-angle locking

Info

Publication number: CN211749991U
Application number: CN201921898424.9U
Authority: CN
Inventors: 付中国; 梁文魁; 徐恩海
Original assignee: Shanghai Bata Medical Instrument Co ltd
Current assignee: Shanghai Bata Medical Instrument Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-10-27
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses a fixed straight type interlocking intramedullary nail of humerus of multi-angle locking, including humerus intramedullary nail main nail, humerus intramedullary nail main nail is hollow structure, humerus intramedullary nail main nail includes near-end intramedullary nail, distal end intramedullary nail and linkage segment, near-end intramedullary nail diameter is greater than distal end intramedullary nail diameter, carry out transitional coupling through the linkage segment between near-end intramedullary nail one end and the distal end intramedullary nail, near-end intramedullary nail other end internal connection terminal cap, near-end intramedullary nail, distal end intramedullary nail and linkage segment structure as an organic whole, near-end intramedullary nail diameter is 9mm, near-end intramedullary nail and distal end intramedullary nail are opened there are a plurality of nail holes, the inside bone screw that is equipped with in nail hole, wherein the bone screw of near-end intramedullary nail is multi-angle interlocking. The utility model discloses increased according to the different chance of selecting suitable humerus intramedullary nail main nail of the individual anatomy of humerus, reduced because the great humerus head part opening of humerus head fracture that causes and the operation risk of axillary nerve damage.

Description

Straight type interlocking intramedullary nail of fixed humerus of multi-angle locking

Technical Field

The utility model relates to a humerus bone screw apparatus field, concretely relates to fixed straight type interlocking intramedullary nail of humerus of multi-angle locking.

Background

Compared with the normal population: patients with short stature have smaller humeral head diameter, shorter humeral shaft overall length and narrow medullary cavity diameter. When normal intramedullary nails are used, the diameter, especially the proximal diameter, is larger, which often causes iatrogenic humeral fractures during surgery because the opening of the humeral head part is larger. Through research and analysis of a large number of clinical examples, the fracture of the greater tubercle can be firmly fixed only by the distance of about 5mm between the proximal locking nail and the fracture line. In addition, according to the measurement of the positions of a large number of axillary nerves of Chinese people, the axillary nerves of Chinese people are positioned 35mm below the greater tubercle, so that the fact that the nail feeding point needs to be adjusted when the nail is fed is determined, and therefore the axillary nerves are avoided and are prevented from being damaged.

The strength of the steel plate for extramedullary eccentric fixation against stress such as humeral varus and the like is weak, and the steel plate is fixed with intramedullary central intramedullary nail. Biomechanical and clinical studies have shown in recent years that the medial humeral spacer screw is critical in maintaining reduction stability to fracture healing. The inner humeral distance screw with the fixed angle is difficult to cover the problems of human anatomy difference, change of fracture form and the like in clinical practice. The use of universal locking plates or intramedullary nails is one of the solutions to the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fixed straight type interlocking intramedullary nail of humerus of multi-angle locking to when solving the normal model intramedullary nail of use that proposes in the above-mentioned background art, the diameter is bigger than normal, especially near-end diameter, often because the partial opening of humeral head is great and cause iatrogenic fracture and can't effectively use inboard apart from the problem that the screw leads to restoring to the throne operation risks such as losing internal fixation failure. In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fixed straight type interlocking intramedullary nail of humerus of multi-angle locking, includes humerus intramedullary nail main nail, humerus intramedullary nail main nail is hollow structure, humerus intramedullary nail main nail includes near-end intramedullary nail, distal end intramedullary nail and linkage segment, near-end intramedullary nail diameter is greater than distal end intramedullary nail diameter, carry out smooth transition through the linkage segment between near-end intramedullary nail one end and the distal end intramedullary nail and connect, near-end intramedullary nail other end internal connection terminal cap, near-end intramedullary nail, distal end intramedullary nail and linkage segment structure as an organic whole, near-end intramedullary nail diameter is 9mm, near-end intramedullary nail and distal end intramedullary nail are opened there are a plurality of nail holes, the inside bone screw that corresponds that is equipped with in nail hole, the nail hole of near-end intramedullary nail is divided into No. 3 nail hole, No. 4 nail hole, No. 1 nail hole and No. 2 nail holes by last under to according to, No. 4 bone screw, No. 1 bone screw and No. 2 bone screw, divide into No. 6 nail holes and No. 7 nail holes by last under to on the nail hole of distal end intramedullary nail 1, the bone screw correspondence is divided into No. 6 bone screw and No. 7 bone screw, No. 1 bone screw is the tuberosity staple, can follow the horizontal each 10 regulation of controlling of humerus intramedullary nail main nail, No. 2 bone screw is the other staple in intertubercle ditch, is located the tuberosity below, avoids tuberosity below 35mm department axillary nerve simultaneously, and 360 directions are adjustable around following, and the angle of regulation scope is for being 10 degrees scopes around with the central line direction, No. 3 bone screw is tuberosity top staple, No. 4 bone screw is tuberosity outside staple, No. 6 bone screw and No. 7 are distal end locking nail, No. 7 nail hole is the sliding hole, No. 1 bone screw and No. 2 bone screw contained angle are 90, the included angle between the No. 2 bone screw and the No. 4 bone screw is 25 degrees and deviates to the outer side direction of a large nodule, the included angle between the No. 2 bone screw and the No. 3 bone screw is 15 degrees and deviates to the inter-nodule sulcus direction, and the included angle between the No. 6 bone screw and the No. 7 bone screw is 10 degrees.

Preferably, the length of the main nail of the humerus intramedullary nail is provided with two specifications of 130mm and 150mm, and the diameter of the side, connected with the connecting section, of the distal intramedullary nail of the main nail of the humerus intramedullary nail is provided with two specifications of 6mm and 7 mm.

Preferably, the end cap length gauge is 0mm, 5mm, 10mm and 15 mm.

Preferably, threaded connection between No. 4 nail hole and the No. 4 bone screw can effectively prevent to move back the nail, be equipped with the packing ring between No. 4 nail hole and the No. 4 bone screw, the packing ring divide into circular packing ring and eccentric packing ring.

Preferably, open No. 5 nail holes on the proximal end intramedullary nail of the humerus intramedullary nail main nail of 150mm specification, No. 5 nail hole internal thread connects No. 5 bone screws, No. 5 bone screws are distal end locking nail, are 45 contained angles with humerus intramedullary nail main nail, No. 5 nail holes are located No. 2 nail hole downside.

Preferably, the head structure of the bone screw is divided into a general pointed head and a blunt head, and the cap structure of the bone screw is divided into a nail-in-nail form, a general round head form and a round head belt nail hole form.

The utility model discloses a technological effect and advantage: the utility model can select a proper humerus intramedullary nail main nail according to the diameter of the humerus head, the length of the humerus shaft and the diameter of the medullary cavity, thereby reducing the operation risk to the humerus due to the larger opening of the humerus head part and the thicker intramedullary nail, and avoiding the axillary nerve to avoid the injury to the humerus; no. 2 bone screw adopts universal adjustment design, selects proper angle according to the actual position of fracture line in clinic, makes the screw-in point far away from fracture line, so as to achieve the purpose of firm fixation and the purpose of fixing the inner side distance of humerus, and increases the holding force of screw in osteoporotic fracture; the adjustable angle of the No. 1 bone screw can ensure that the lock pin is driven into the opposite cortical bone to ensure the fixing effect, avoid the fracture reduction from being slightly staggered, drive the lock pin into the anatomical neck of the opposite side of the humeral head and reduce the stability effect; the multi-angle fixation characteristic is beneficial to fixing the screw to an ideal position according to individual anatomical difference of a patient and the reduction condition of the operation during the operation, so as to increase the fixation strength of the intramedullary nail and avoid the reduction and loss after the operation.

Drawings

Fig. 1 is a schematic structural view of the humerus intramedullary nail main nail of 130mm length specification of the present invention;

fig. 2 is a schematic structural view of a 150mm long humeral intramedullary nail main nail of the present invention;

FIG. 3 is a sectional view of the No. 1 nail hole of the present invention;

fig. 4 is a sectional view of the No. 2 nail hole of the present invention.

In the figure: the nail comprises a main nail of a 1-humerus intramedullary nail, a 2-terminal cap, a 3-nail hole, a 4-bone screw, a 11-proximal intramedullary nail, a 12-distal intramedullary nail, a 13-connecting section, a 31-3 nail hole, a 32-4 nail hole, a 33-1 nail hole, a 34-2 nail hole, a 35-6 nail hole, a 36-7 nail hole, a 37-5 nail hole, a 41-3 bone screw, a 42-4 bone screw, a 43-1 bone screw, a 44-2 bone screw, a 45-6 bone screw and a 46-7 bone screw.

Detailed Description

In order to make the technical means, the creative features, the objectives and the functions of the present invention easily understood and appreciated, the present invention will be further described with reference to the specific drawings, and in the description of the present invention, it should be noted that unless otherwise specified or limited, the terms "mounted," "connected" and "connected" should be understood broadly, for example, they may be fixedly connected, detachably connected, integrally connected or mechanically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

Example 1

The multi-angle locking and fixing straight cross-locking intramedullary nail for humerus, as shown in fig. 1 to 4, comprises a main nail 1 for a main intramedullary nail for a humerus, wherein the main nail 1 for the main intramedullary nail for the humerus is of a hollow structure, the main nail 1 for the main intramedullary nail for the humerus comprises a proximal intramedullary nail 11, a distal intramedullary nail 12 and a connecting section 13, the diameter of the proximal intramedullary nail 11 is larger than that of the distal intramedullary nail 12, one end of the proximal intramedullary nail 12 and the distal intramedullary nail 11 are in smooth transition connection through the connecting section 13, a terminal cap 2 is connected to the other end of the proximal intramedullary nail 11, the distal intramedullary nail 12 and the connecting section 13 are of an integral structure, the diameter of the proximal intramedullary nail 11 is 9mm, a plurality of nail holes 3 are formed in the proximal intramedullary nail 12 and the distal intramedullary nail 12, corresponding bone screws 4 are arranged in the nail holes 3, and the nail, Number 4 nail hole 32, number 1 nail hole 33 and number 2 nail hole 34, bone screw 4 is divided into number 3 bone screw 41, number 4 bone screw 42, number 1 bone screw 43 and number 2 bone screw 44 correspondingly, divide into number 6 nail hole 35 and number 7 nail hole 36 by from the top down on the nail hole 3 of distal intramedullary nail 121, the bone screw is divided into number 6 bone screw 45 and number 7 bone screw 46 correspondingly, number 1 bone screw 43 is the tuberosity staple, can respectively adjust along the horizontal left and right sides of humerus intramedullary nail main nail 1, number 2 bone screw 44 is the adjacent staple of intertubercular sulcus, is located the tuberosity below, avoids 35mm department axillary nerve below the tuberosity simultaneously, and 360 orientation is adjustable around, and the angle of adjustment scope is for being 10 degrees scopes around the midline orientation, number 3 bone screw 41 is the top staple of tuberosity, and number 2 bone screw 44 is designed as adjustable angle, according to actual fracture type and fracture line position, nail angle can suitably be adjusted into to reach best fixed effect, No. 4 bone screw 42 is the outer staple of greater tubercle, No. 6 bone screw 45 and No. 7 bone screw 46 are distal end locking nail, No. 7 nail holes are the sliding hole, No. 1 bone screw and No. 2 bone screw contained angles are 90, and No. 2 bone screw and No. 4 bone screw contained angles are 25, and the outer side direction of deviant greater tubercle, No. 2 bone screw 44 and No. 3 bone screw 41 contained angles are 15, and the ditch direction between the deviant tubercle, the contained angle is 10 between No. 6 bone screw 45 and No. 7 bone screw 46, can guarantee effective locking effect, can avoid hindering near blood vessel and nerve as far as possible again.

Example 2

The multi-angle locking and fixing straight cross-locking intramedullary nail for humerus, as shown in fig. 1 to 4, comprises a main nail 1 for a main intramedullary nail for a humerus, wherein the main nail 1 for the main intramedullary nail for the humerus is of a hollow structure, the main nail 1 for the main intramedullary nail for the humerus comprises a proximal intramedullary nail 11, a distal intramedullary nail 12 and a connecting section 13, the diameter of the proximal intramedullary nail 11 is larger than that of the distal intramedullary nail 12, one end of the proximal intramedullary nail 12 and the distal intramedullary nail 11 are in smooth transition connection through the connecting section 13, a terminal cap 2 is connected to the other end of the proximal intramedullary nail 11, the distal intramedullary nail 12 and the connecting section 13 are of an integral structure, the diameter of the proximal intramedullary nail 11 is 9mm, a plurality of nail holes 3 are formed in the proximal intramedullary nail 12 and the distal intramedullary nail 12, corresponding bone screws 4 are arranged in the nail holes 3, and the nail, Number 4 nail hole 32, number 1 nail hole 33 and number 2 nail hole 34, bone screw 4 is divided into number 3 bone screw 41, number 4 bone screw 42, number 1 bone screw 43 and number 2 bone screw 44 correspondingly, divide into number 6 nail hole 35 and number 7 nail hole 36 by from the top down on the nail hole 3 of distal intramedullary nail 121, the bone screw is divided into number 6 bone screw 45 and number 7 bone screw 46 correspondingly, number 1 bone screw 43 is the tuberosity staple, can respectively adjust along the horizontal left and right sides of humerus intramedullary nail main nail 1, number 2 bone screw 44 is the adjacent staple of intertubercular sulcus, is located the tuberosity below, avoids 35mm department axillary nerve below the tuberosity simultaneously, and 360 orientation is adjustable around, and the angle of adjustment scope is for being 10 degrees scopes around the midline orientation, number 3 bone screw 41 is the top staple of tuberosity, and number 2 bone screw 44 is designed as adjustable angle, according to actual fracture type and fracture line position, nail angle can suitably be adjusted into to reach best fixed effect, No. 4 bone screw 42 is the outer staple of greater tubercle, No. 6 bone screw 45 and No. 7 bone screw 46 are distal end locking nail, No. 7 nail holes are the sliding hole, No. 1 bone screw 43 and No. 2 bone screw 44 contained angle are 90, and No. 2 bone screw and No. 4 bone screw contained angle are 25, the outer direction of deviant greater tubercle, and No. 2 bone screw 44 and No. 3 bone screw 41 contained angle are 15, the ditch direction between the deviant tubercle, and the contained angle is 10 between No. 6 bone screw 45 and No. 7 bone screw 46, can guarantee effective locking effect, can avoid hindering near blood vessel and nerve as far as possible again.

Preferably, the length of the humerus intramedullary nail main nail 1 is provided with two specifications of 130mm and 150mm, and the diameter of the side, connected with the connecting section 13, of the distal intramedullary nail 12 of the humerus intramedullary nail main nail 1 is provided with two specifications of 6mm and 7 mm.

Preferably, the terminal cap 2 has a length specification of 0mm, 5mm, 10mm and 15 mm.

Preferably, threaded connection can effectively prevent to move back the nail between No. 4 nail hole 32 and No. 4 bone screw 42, be equipped with the packing ring between nail hole 32 and the No. 4 bone screw 42, the packing ring divide into circular packing ring and eccentric packing ring, and the suture can be fixed to the packing ring to do benefit to the suture of later stage ligament and bone piece, both saved space, again can effective fixed distribution stylolite.

Preferably, the proximal intramedullary nail 11 of the 150 mm-sized main humeral intramedullary nail 1 is provided with a number 5 nail hole 37, the number 5 nail hole 37 is internally and threadedly connected with a number 5 bone screw, the number 5 bone screw is a distal locking nail and forms an included angle of 45 degrees with the main humeral intramedullary nail 1, and the number 5 nail hole 37 is located on the lower side of the number 2 nail hole 34.

Preferably, the head structure of the bone screw 4 is divided into a general pointed head and a blunt head, and the head structure of the bone screw 4 is divided into a nail-in-nail form, a general round head form and a round head hole-with-nail form.

The utility model discloses process flow and theory of operation do: selecting a proper main nail 1 of the humeral intramedullary nail according to the diameter of the humeral head of a patient, the length of the humeral shaft and the volume of a medullary cavity, wherein the main nail 1 of the humeral intramedullary nail with the 150mm specification is provided with a No. 5 nail hole 37 and a No. 5 bone screw relative to the main nail 1 of the humeral intramedullary nail with the 130mm specification, and after the main nail 1 of the humeral intramedullary nail is implanted into the medullary, a proper form of the bone screw 4 is selected, mainly the head structure and the nut structure of the bone screw 4, and the bone screw 4 is installed in the corresponding nail hole 3 to fix the main nail 1; the number 2 bone screw 44 adopts a universal adjustment design, and selects a proper angle according to the actual position of the fracture line in clinic, so that the screw feeding point is far away from the fracture line, and the purpose of firm fixation is achieved; the adjustable angle of the No. 1 bone screw 43 can ensure that the lock pin is driven into the opposite cortical bone to ensure the fixing effect, avoid the fracture reduction from being slightly staggered, and drive the lock pin into the anatomical neck at the opposite side of the humeral head, thereby greatly reducing the stability effect.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a fixed straight type interlocking intramedullary nail of humerus of multi-angle locking, includes humerus intramedullary nail main nail, its characterized in that: the humerus intramedullary nail main nail is of a hollow structure and comprises a near-end intramedullary nail, a far-end intramedullary nail and a connecting section, wherein the diameter of the near-end intramedullary nail is larger than that of the far-end intramedullary nail, one end of the near-end intramedullary nail and the far-end intramedullary nail are connected in a smooth transition mode through the connecting section, the other end of the near-end intramedullary nail is connected with a terminal cap in an internal connection mode, the near-end intramedullary nail, the far-end intramedullary nail and the connecting section are of an integrated structure, the diameter of the near-end intramedullary nail is 9mm, a plurality of nail holes are formed in the near-end intramedullary nail and the far-end intramedullary nail, corresponding bone screws are arranged in the nail holes, the nail holes of the near-end intramedullary nail are divided into a No. 3 nail hole, a No. 4 nail hole, a No. 1 nail hole and a No. 2 nail hole from top to bottom according to the positions, the bone screws are correspondingly divided into a No. 3, the bone screw correspondence divide into 6 # bone screws and 7 # bone screws, No. 1 bone screw is the tuberosity staple, can follow the horizontal each 10 regulation of controlling of humerus intramedullary nail main nail, No. 2 bone screws are the other staple of groove between the tubercle, lie in the tuberosity below, avoid tuberosity below 35mm department axillary nerve simultaneously, and 360 directions are adjustable around following, and the angle of regulation scope is to be 10 degrees scopes around with the central line direction, No. 3 bone screws are tuberosity top staple, No. 4 bone screws are tuberosity outside staple, No. 6 bone screws and No. 7 bone screws are distal end locking nail, No. 7 nail hole is the sliding hole, No. 1 bone screw and No. 2 bone screw contained angle are 90, No. 2 bone screw and No. 4 bone screw contained angle are 25, tuberosity outside direction, No. 2 bone screw and No. 3 bone screw contained angle are 15, the intertuberant groove direction of deviant, the included angle between the No. 6 bone screw and the No. 7 bone screw is 10 degrees.

2. The multi-angle locking and fixing straight humeral interlocking intramedullary nail of claim 1, wherein: the length of the humerus intramedullary nail main nail is provided with two specifications of 130mm and 150mm, and the diameter of the side, connected with the connecting section, of the far-end intramedullary nail of the humerus intramedullary nail main nail is provided with two specifications of 6mm and 7 mm.

3. The multi-angle locking and fixing straight humeral interlocking intramedullary nail of claim 1, wherein: the length specifications of the terminal cap are 0mm, 5mm, 10mm and 15 mm.

4. The multi-angle locking and fixing straight humeral interlocking intramedullary nail of claim 1, wherein: threaded connection between No. 4 nail hole and the No. 4 bone screw can effectively prevent to move back the nail, be equipped with the packing ring between No. 4 nail hole and the No. 4 bone screw, the packing ring divide into circular packing ring and eccentric packing ring.

5. The multi-angle locking and fixing straight humeral interlocking intramedullary nail of claim 2, wherein: open No. 5 nail holes on the proximal end intramedullary nail of the humerus intramedullary nail main nail of 150mm specification, No. 5 nail hole internal thread connects No. 5 bone screws, No. 5 bone screws are distal end locking nail, are 45 contained angles with humerus intramedullary nail main nail, No. 5 nail holes are located No. 2 nail hole downside.

6. The multi-angle locking and fixing straight humeral interlocking intramedullary nail of claim 1, wherein: the head structure of the bone screw is divided into a common sharp head and a blunt head, and the head structure of the bone screw is divided into a middle nail form, a common round head form and a round head hole with nail form.