CN212879529U

CN212879529U - Femoral intertrochanteric fracture fixing device

Info

Publication number: CN212879529U
Application number: CN202020854045.6U
Authority: CN
Inventors: 刘海新
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-04-06
Anticipated expiration: 2030-05-20

Abstract

The utility model provides a fracture fixing device between femoral trochanter, it includes main nail, double-end pressurization supporting screw, external screw thread, locking screw, tension screw, helical blade, first screw hole, through-hole and second screw hole, the middle part of main nail links up has double-end pressurization supporting screw, and the both ends of double-end pressurization supporting screw all are provided with the external screw thread, and the bottom of main nail links up has locking screw, and main nail top through-hole inscription has tension screw, and tension screw's one end is provided with the helical blade, the utility model discloses bionical design, simple structure is reasonable, and the minimal access surgery is gone into, and the nail body inserts human skeleton after, can prevent nail body displacement and rotation, more accords with the atress mode of people's thighbone near-end physiological state, and security and reliability.

Description

Femoral intertrochanteric fracture fixing device

Technical Field

The utility model relates to a fixing device specifically is a fracture fixing device between femoral trochanter.

Background

Intertrochanteric femoral fractures are a common fracture in the elderly. The following three characteristics exist clinically: firstly, patients are old, the general condition is poor, and various medical complications are accompanied, and the complications are aggravated after fracture, so that the difficulty of disease treatment is increased, and the disease death rate is high; secondly, bone quality, which is often clear osteoporosis, causes the reliability of fracture fixation to be reduced; thirdly, most of the fracture types are comminuted and unstable fractures, which are easy to cause hip varus after operation, head and neck shortening, internal fixation failure and fracture. Compared with extramedullary fixation, an intramedullary fixation system has the advantage of shorter force arm, and surgical fixation is well known as early as possible in treatment, but the most widely used intramedullary fixation pfna series do not solve the biomechanical problems of the pressure trabecula and the tension trabecula at present. The pfna series single-nail spiral cutter head has a good tension effect and replaces a tension bone trabecula on the outer side wall between rotors, but the pfna series single-nail spiral cutter head is not well designed to replace the tension bone trabecula, and the technical problem that the spiral cutter head cuts the femoral head when bearing load is not solved. The concept of initial pressurization and initial tension of the spiral cutter head only contributes to fracture reduction, but does not contribute much to maintaining stability and preventing displacement after fracture reduction; even the possibility of fracture displacement is promoted due to the slidable design, so that the fixation is not firm due to stress change, and adverse effects such as broken nail with concentrated stress, femoral head cut by a screw and the like are caused.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming prior art's defect, the utility model provides a fracture fixing device between thighbone trochanter has bionic design, and simple structure is reasonable, and the minimally invasive surgery approaches, and the nail body inserts human skeleton after, can prevent nail body displacement and rotation, more accords with the atress mode of people's thighbone near-end physiological state, and security and reliability are higher, and convenient operation.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model discloses a main nail, double-end pressurization supporting screw, external screw thread, locking screw, tension screw, helical blade, first screw hole, through-hole and second screw hole, the middle part of main nail has linked up double-end pressurization supporting screw, and the both ends of double-end pressurization supporting screw all are provided with the external screw thread, and the bottom of main nail has linked up locking screw, and main nail top through-hole inscription has tension screw, and tension screw's one end is provided with helical blade.

Preferably, the main nail is provided with a first threaded hole at a position corresponding to the double-headed pressurizing support screw.

Preferably, a through hole is formed in the position, corresponding to the tension screw, of the top end of the main nail.

Preferably, a second threaded hole is formed in the bottom end of the main nail corresponding to the position of the locking screw.

Preferably, the tension screw is angled between 100 and 117 degrees from the main nail.

Preferably, the double-headed compression support screw is angled 140 to 160 degrees from the main nail.

Has the advantages that: the utility model discloses the tension screw becomes between 100 to 117 degrees with the main nail contained angle for the tension screw has the similar line shape direction of thighbone near-end tension bone trabecula, the contained angle with the main nail is 100-117 can produce the tensile stress in the operation, double-end pressurization supporting screw becomes 140 to 160 degrees with the main nail contained angle, double-end pressurization supporting screw has the similar line shape direction of thighbone apart from bone trabecula, the contained angle with the main nail is 140-160 degrees and with the first screw hole interlock locking of seting up on the main nail thereby resist the compressive stress when people stand heavy burden, double-end pressurization supporting screw and tension screw end in close contact with, the coplanar in three-dimensional space forms pressure bearing structure, the spiral blade becomes the anti-cutting structure of large tracts of land above the double-end pressurization supporting screw under the compressive stress conduction mechanism when people stand heavy burden, the utility model discloses bionic design, simple structure is reasonable, the minimally invasive surgery approach is realized, after the nail body is inserted into the skeleton of the human body, the displacement and the rotation of the nail body can be prevented, the stress mode of the physiological state of the near end of the femur of a human is better met, the safety and the reliability are higher, and the operation is convenient.

Drawings

The accompanying drawings 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 and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the three-dimensional structure of the main nail of the present invention;

FIG. 3 is a schematic view of the tension screw structure of the present invention;

FIG. 4 is a schematic view of the three-dimensional structure of the double-headed pressurizing support screw of the present invention;

reference numbers in the figures: 1. a main nail; 2. a double-headed pressure support screw; 3. an external thread; 4. a locking screw; 5. A tension screw; 6. a helical blade; 7. a first threaded hole; 8. a through hole; 9. and a second threaded hole.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying fig. 1-4.

The first embodiment is given by fig. 1-4, the utility model provides a fracture fixing device between femoral trochanter, including main nail 1, double-end pressurization supporting screw 2, external screw thread 3, locking screw 4, tension screw 5, spiral blade 6, first screw hole 7, through-hole 8 and second screw hole 9, the middle part of main nail 1 links up has double-end pressurization supporting screw 2, and the both ends of double-end pressurization supporting screw 2 all are provided with external screw thread 3, and the bottom of main nail 1 links up has locking screw 4, and the downthehole tension screw 5 that has connect in main nail 1 top through-hole, and the one end of tension screw 5 is provided with spiral blade 6.

The main nail 1 is provided with a first threaded hole 7 corresponding to the position of the double-head pressurizing support screw 2, so that the main nail is convenient to be installed in a matching way.

The top end of the main nail 1 is provided with a through hole 8 corresponding to the position of the tension screw 5, so that the main nail is convenient to be installed in a matching way.

The bottom end of the main nail 1 is provided with a second threaded hole 9 corresponding to the position of the locking screw 4, so that the main nail is convenient to be installed in a matching way.

The tension screw 5 is included between 100 and 117 degrees with the main nail 1, so that the tension screw 5 has a similar deformed direction with the proximal tension trabecula of the femur, and the included angle with the main nail 1 is 100-117 degrees, and the tensile stress can be generated in the operation.

The double-head compression support screw 2 forms an included angle of 140-160 degrees with the main screw 1, the double-head compression support screw 2 has a similar walking direction with the femoral talar trabecula, forms an included angle of 140-160 degrees with the main screw 1 and is locked in a meshing way with the first threaded hole 7 formed in the main screw 1 so as to resist the compression stress when a person stands for weight bearing.

The working principle is as follows: the included angle between the tension screw 5 and the main nail 1 of the utility model is between 100 and 117 degrees, so that the tension screw 5 has the similar shape moving direction with the tension trabecula at the proximal end of the femur, the included angle between the double-head compression support screw 2 and the main nail 1 is 100 degrees to 117 degrees, the included angle between the double-head compression support screw 2 and the main nail 1 is 140 degrees to 160 degrees, the double-head compression support screw 2 has the similar walking direction with the femoral talar trabecula, the included angle between the main nail 1 and the double-head pressure supporting screw 2 is 140-160 degrees, the double-head pressure supporting screw 2 is meshed and locked with a first threaded hole 7 formed in the main nail 1 so as to resist the pressure stress when a person stands for weight bearing, the double-head pressure supporting screw 2 is tightly contacted with the tail end of a tension screw 5 and is positioned on the same plane of a three-dimensional space to form a pressure supporting structure, and a spiral blade 6 under a pressure stress conduction mechanism becomes a large-area cutting-resistant structure above the double-head pressure supporting screw 2 when the person stands.

Has the advantages that: the utility model discloses bionical design, simple structure is reasonable, and the minimally invasive surgery is gone into the way, and the nail body can prevent nail body displacement and rotation after inserting human skeleton, more accords with the atress mode of people's thighbone near-end physiological state, and security and reliability are higher, and convenient operation.

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 may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a fracture fixing device between femoral trochanter, includes main nail (1), double-end pressurization supporting screw (2), external screw thread (3), locking screw (4), tension screw (5), helical blade (6), first screw hole (7), through-hole (8) and second screw hole (9), its characterized in that: the middle part of the main nail (1) is connected with a double-head pressurizing support screw (2), both ends of the double-head pressurizing support screw (2) are provided with external threads (3), the bottom end of the main nail (1) is connected with a locking screw (4), a tension screw (5) is connected in a through hole in the top end of the main nail (1), and one end of the tension screw (5) is provided with a spiral blade (6).

2. The intertrochanteric femoral fracture fixation device of claim 1, characterized in that the main nail (1) is provided with a first threaded hole (7) corresponding to the position of the double-headed compression support screw (2).

3. The intertrochanteric femoral fracture fixation device of claim 1, characterized in that the top of the main nail (1) is provided with a through hole (8) corresponding to the position of the tension screw (5).

4. The intertrochanteric femoral fracture fixation device of claim 1, characterized in that the bottom end of the main nail (1) is provided with a second threaded hole (9) corresponding to the position of the locking screw (4).

5. A femoral intertrochanteric fracture fixation device according to claim 1, characterised in that the tension screw (5) is angled between 100 and 117 degrees from the main nail (1).

6. The intertrochanteric femoral fracture fixation device of claim 1, characterized in that the double-headed compression support screw (2) is angled 140 to 160 degrees from the main nail (1).