CN105640630A - Fixing device for hip fracture - Google Patents

Abstract

The invention provides a fixation device for hip fracture, which includes: a head, at least one hollow sleeve, a lesser trochanter wing, a body, a first side and a second side, wherein the head is a The curved panel body is provided with at least one hip screw hole; the above-mentioned hollow sleeve is arranged on the above-mentioned head; the lesser trochanter wing portion is connected to the head. The above-mentioned body is in the shape of a rectangular plate, and the head, at least one hollow sleeve, the lesser trochanter wing part, and the body are integrally formed in sequence; the first side and the second side are respectively located on the outside and inside of the above-mentioned device. , wherein the device is provided with a plurality of through holes and a positioning hole penetrating the first side and the second side of the device; wherein the at least one hollow sleeve is provided on the second side of the head and communicates with the hip screw hole.

Description

A fixation device for hip fracture

technical field

The invention relates to a fixation device, in particular to a fixation device for hip fracture.

Background technique

The bones of different parts of the human body have different shapes and complex structures. In the event of fractures and other injuries, the medical treatment and rehabilitation methods usually need to be given appropriate treatment based on the bone structure of the injured part. When the fractured part is close to the joint When it is not suitable to use plaster fixation, devices and bone nails are usually used as fixation for fracture treatment.

Taking hip fracture as an example, when the patient is subjected to high-energy trauma, such as a car accident, strong collision or falling from a height; or low-energy trauma, such as slipping or falling, the proximal femur may suffer from twists and turns And fractures (for example, femoral head fracture, femoral neck fracture, and intertrochanteric fracture or other comminuted fractures), it is therefore necessary to fix the damaged hip with devices or bone plates.

Generally speaking, hip fractures can be fixed with sliding hip screws (dynamic chipscrew, DHS). Afterwards, the fracture site of the proximal femur is affected by the stress and slides backward excessively, resulting in damage to the lesser trochanter, which will also cause malunion, healing failure, or other complications at the postoperative fracture site.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a hip fracture fixation device that can fit on the bone and is aimed at bone fracture or fracture at the proximal end of the femur. friction and provides sliding hip screw support for fixation. When the contact between the device of the present invention and the bone is reduced, there will be a gap between the device and the bone, in addition to eliminating possible complications caused by the device's pressurization of the bone (such as bacterial infection, slow fracture healing, fixation failure, etc.) , It can also improve the blood transport of the affected area and the recovery and growth of the periosteum.

Another object of the present invention is to provide a fixation device for hip fracture, and the above-mentioned device does not need to be pre-bent in advance (that is, the present invention is an anatomical device), when the device is implanted in the hip fracture site , in addition to maintaining the effect of fixation, the lesser trochanter lateral wing of the device also provides an important supporting effect and prevents the proximal femoral fracture site from being affected by stress and excessively sliding backward. In one embodiment, the hip fracture fixation device of the present invention is applicable to various indications of femur damage (such as femoral head fracture, femoral neck fracture, intertrochanteric fracture, etc.) and can protect the lesser trochanter.

In the first viewpoint of the present invention, a fixation device for hip fractures of the present invention comprises: a head, at least one hollow sleeve, a lateral wing of the lesser trochanter, a body, a first side and a On the second side, the head is an arc plate body with at least one hip screw hole; the at least one hollow sleeve is arranged on the head; the wing of the lesser trochanter is connected to the head. The above-mentioned body is a rectangular plate body, and the head, at least one hollow sleeve, the wings of the lesser trochanter, and the body are sequentially integrally formed; the first side and the second side are respectively located on the outside and inside of the above-mentioned device The device is provided with a plurality of perforations and a positioning hole through the first side and the second side of the device; the at least one hollow sleeve is arranged on the second side of the head and communicates with the hip screw hole. In one embodiment, the number of hip screw holes is the same as the number of hollow sleeves.

In the second aspect of the present invention, the present invention also provides a fixation device for hip fractures with an anti-oxidation layer, that is, the surface of the above-mentioned device further has an anti-oxidation layer, which is manufactured by first using The surface layer of the device is removed by sandblasting and pickling, and then the holes produced by the above device after sandblasting and pickling are partially repaired by laser, and then the surface of the above device is ground to reduce the roughness of the surface of the device, and then the surface of the device is Polishing is carried out, and finally the surface is modified so that the surface of the fixation device for hip fracture has a wear-resistant anti-oxidation layer. In one embodiment, the above-mentioned device is made of titanium or titanium 6 aluminum 4 vanadium (Ti6Al4V). In one embodiment, the above-mentioned device is made of steel.

Preferably, the above-mentioned multiple perforations and at least one hip screw hole are in the form of screw holes.

Preferably, the positioning hole is oval.

In one embodiment, the second side surface of the wing portion of the lesser trochanter has a curvature; in some embodiments, the radius of curvature of the curvature of the second side surface of the wing portion of the lesser trochanter is between 30 mm and 300 mm.

Depending on the shape, size and damage of the patient's hip fracture, the medical staff decides the angle at which to implant the sliding hip screw to the hip fracture, and then adjusts the angle between the head of the device and the hollow sleeve. Then the end of the sliding hip screw is inserted into the hollow sleeve and implanted into the hip fracture site, and finally a fixing component (such as a screw) is locked in the hole of the hip screw, so that the sliding hip screw is closely combined with the device Maintains the effect of sliding screw fixation in damaged locations. In one embodiment, the range of the included angle between the head and the hollow sleeve is further between 125 degrees and 150 degrees.

In some embodiments, after the above-mentioned sliding hip screw fixation is completed, the fixation device can be fastened with a bone screw or a positioning bone screw through the positioning hole, and then the bone screw or positioning bone screw is used as a sliding rod, and the positioning hole As a chute, the fixation device can be displaced to a certain extent on the proximal femur, and supports the proximal femur (such as the greater trochanter, Greattrochanter) and the lesser trochanter ( Lessertrochanter), and then bolt other bone nails to the perforation of the device to fix the device on the proximal femur and the femoral shaft, and then reset and adjust, so that the hip fracture fixation device is not easy to produce angle deviation during fixation.

Description of drawings

Embodiments of the present invention are illustrated by examples in the following figures, but not intended to limit the present invention. Similar component symbols in the following figures refer to similar components.

Fig. 1 is a schematic diagram of a hip fracture fixation device.

Figure 2 is a side view of the hip fracture fixation device.

Fig. 3 is an embodiment of the fixing device attached to the proximal end of the femur.

Fig. 4 is an embodiment of a fixation device fixed to a hip fracture.

Fig. 5 is another embodiment of a fixation device fixed to a hip fracture.

Description of main component symbols:

100 Hip Fracture Fixation Device 114 Hip Screw Holes

102 head 116 perforation

104 body 118 positioning holes

106 lesser trochanter wing 120 through hole

108 hollow sleeve 402 sliding hip screw

110 404 locking screw on the first side

112 second side

detailed description

Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand the efficacy and advantages of the present invention through the content disclosed in this specification. Moreover, the present invention can also be used and implemented through other specific embodiments, and various details described in this specification can also be applied based on different requirements, and various modifications or changes can be made without departing from the spirit of the present invention.

The present invention will be described in terms of preferred embodiments and viewpoints. Such descriptions explain the structure of the present invention in detail, and are only used for illustration rather than to limit the patent scope of the present invention. Therefore, in addition to the preferred embodiment described in the description, the present invention can also be widely practiced in other embodiments.

The present invention is a hip fracture fixation device 100, as shown in Figure 1 and Figure 2, the aforementioned device includes: a head 102, a body 104, lesser trochanter flanks 106, at least one hollow sleeve 108, a first A side 110 and a second side 112, wherein the head 102 is an arc plate body and is provided with at least one hip screw hole 114; the above-mentioned at least one hollow sleeve 108 is arranged on the above-mentioned head; the flank of the lesser trochanter connected to the head. The above-mentioned body is a rectangular plate body, and the head 102, the hollow sleeve 108, the lesser trochanter wing 106, and the body 104 are sequentially integrally formed; the first side 110 and the second side 112 are respectively located on the above-mentioned device The outer side and the inner side of the device, wherein the above-mentioned device is provided with a plurality of perforations 116 and a positioning hole 118 through the first side and the second side of the device; wherein the above-mentioned hollow sleeve is arranged on the second side of the head and connected to the hip The screw holes are connected; in one embodiment, Fig. 2 is a side view of the hip fracture fixation device, wherein the second side of the lesser trochanter wing part 106 has a curvature again; in one embodiment, the head of the device The included angle range with the hollow casing can be between 125 degrees and 150 degrees.

In some embodiments, the above-mentioned hip fracture fixation device is further provided with a plurality of through holes 120 in the head 104 of the device and through the first side 110 and the second side 112 of the head of the device, so that more A through-hole 116 can be passed through by a steel wire for temporarily fixing the device to the bone. In one embodiment, the number of the above-mentioned through holes 120 is three. In some embodiments, the plurality of through holes 112 and the wall of at least one hip screw hole 114 are threaded; and the positioning hole 118 is oval and located in the body 104 of the device.

In one embodiment, the thickness of the above-mentioned lesser trochanter wing portion 106 presents a gradient change, and the thickness of the lesser trochanter wing portion becomes thicker as the position is closer to the head. In one embodiment, the thickness variation of the wing portion of the lesser trochanter is between 1.5mm and 2mm.

In one embodiment, the head 102 of the device is a curved plate body and can correspond to the curvature of the greater trochanter of the femur. The curvature of the lesser trochanter flank portion 106 of the device can correspond to the curvature near the position of the lesser trochanter (Lessertrochanter) on the side of the femur. The material used to make the device can further be steel, titanium or titanium6aluminum4vanadium (Ti6Al4V); in one embodiment, the surface of the above-mentioned device has a layer of wear-resistant and anti-oxidation layer.

As shown in FIG. 3 , it is an embodiment of the device attached to the proximal end of the femur. After the sliding hip screw 402 is implanted into the hip fracture site, the angle between the head 102 of the device and the hollow sleeve 108 needs to be adjusted depending on the implantation angle of the sliding hip screw 402, and then the hollow sleeve 108 Insert the end of the sliding hip screw and implant the hollow sleeve 108 to the hip fracture site, and finally lock the hip screw hole 114 with a fixing component (such as a screw), so that the sliding hip screw is closely combined with the device to achieve fixed effect.

In one embodiment, after the fixation of the above-mentioned device is completed, at least one locking screw (locking screw) 404 can be passed through the hole in the head of the device to the damaged part of the hip, so that the sliding hip screw and The locking screws present a zigzag arrangement to enhance the fixing effect of the device. In an alternative embodiment, another sliding hip screw can be used instead of the above-mentioned locking screw to penetrate the damaged part of the hip, so the device needs to add an additional hip screw hole and a hollow sleeve. In one embodiment, the number of hip screw holes and the number of hollow sleeves need to be the same.

In some embodiments, the aforementioned body 104 is symmetrical in shape.

In certain embodiments, the aforementioned head has at least 3 perforations.

In one embodiment, the above-mentioned head has 4 perforations. In one embodiment, the radius of curvature of the second side curvature of the lesser trochanter wing portion is between 30 mm and 300 mm, so that the lesser trochanter wing portion of the device can correspond to the surface near the lesser trochanter.

In some embodiments, the body has at least 4 perforations and a positioning hole. In some embodiments, the body of the device has 5 perforations.

In one embodiment, referring to FIG. 4 , it is a fixation device for hip fracture, and the second side curvature of the body of the hip fracture fixation device corresponds to the gentler surface curvature of the femoral diaphysis; and the above-mentioned The curvature of the second side between the head and the body of the device corresponds to the curvature between the greater trochanter and the femoral diaphysis. When each part of the above-mentioned device corresponds to the greater trochanter, the side of the lesser trochanter and the curvature of the backbone, the bone nail can be positioned through the positioning hole and drilled into the proximal femur, and can be movably inserted in the hip fracture The positioning hole of the fixing device, while other multiple bone screws are respectively pierced in multiple perforation holes, and the above positioning holes can be used for positioning after locking the bone screw, and reset and adjust, according to the needs of other multiple bone screws. Then move the position and angle of the fixation device for hip fracture. After the above-mentioned fixation is completed, the head, lesser trochanter flank and body of the hip fracture fixation device can effectively assist in fixing the fracture site or the repaired broken proximal femur and support sliding hip screw and locking screw fixation within the damaged site to avoid structural instability of the proximal femur.

In one embodiment, as shown in FIG. 5 , the above-mentioned multiple perforations are further non-perpendicular or perpendicular to the first side 110 and the second side 112 of the hip fracture fixation device, so the bone nails that pass through the perforations 116 The axes are arranged in a staggered or parallel shape, and through such an arrangement, the fixation of the hip fracture fixation device at the proximal femur can be enhanced, and the displacement of the hip fracture fixation device at the proximal femur can be effectively reduced. In one embodiment, the hip fracture fixation device of the present invention can also reduce the displacement of the sliding hip screw and the locking screw in the damaged part.

In one embodiment, since the curvature of the lesser trochanter is different for each patient, the lesser trochanter side wing 106 of the device can be bent into a desired curvature. In another embodiment, in order to prevent the fracture site of the proximal femur from being affected by the stress and causing the lesser trochanter to be damaged due to stress, the lesser trochanter side wing 106 of the device also provides an important supporting function to protect the fracture site. The structure of the lesser trochanter; in addition, the degree of damage to the proximal femur can also be seen to determine whether to increase the number of locking screws or sliding hip screws to improve the stability of the hip fracture.

In one embodiment, the device can also be used for shaft fractures of the proximal femur. When the head, lesser trochanter flanks, and body of the device correspond to the curvatures of the proximal femur, the bone screw can be positioned. Through the positioning hole and drilled near the fracture position of the femoral shaft, it can be movably pierced into the positioning hole of the hip fracture fixation device, while other multiple bone nails are respectively pierced in multiple perforations, and the positioning hole can be After the bone nail is locked, it is used for positioning and reset adjustment. According to the positions to be fixed by other multiple bone screws, the position and placement angle of the hip fracture fixation device are slightly adjusted and fixed.

The above descriptions are preferred embodiments of the present invention. Those skilled in the art should understand that it is used to illustrate the present invention rather than to limit the scope of patent protection claimed by the present invention. The scope of its patent protection shall be determined according to the patent scope of the present invention and its equivalent fields. All changes or modifications made by those skilled in the art without departing from the spirit or scope of this patent belong to the equivalent change or design completed under the spirit disclosed by the present invention, and should be included in the patent application of the present invention. within the scope of protection.

Claims (13)

1. the stationary installation for hip fracture, it is characterised in that, comprising:

One head, is a cambered plate body, is provided with at least one hip screw hole at this head;

At least one hollow sleeve, is arranged on this head;

One lesser trochanter flank section, is connected with this head;

The whole body portion, in a rectangular plate body, and this head, this lesser trochanter flank section, this at least one hollow sleeve and this body portion are sequentially one-body molded;

One first side, in the outside of this device; And

One two side faces, in the inner side of this device; This device is provided with multiple perforation, a pilot hole through the first side of this device and two side faces; This at least one hollow sleeve is arranged at the two side faces of this head and hip screw hole at least one with this is connected.

2. the stationary installation for hip fracture according to claim 1, it is characterised in that, the surface of this device has an anti oxidation layer.

3. the stationary installation for hip fracture according to claim 1 and 2, it is characterised in that, the material of this device is titanium or titanium 6 aluminium 4 vanadium.

4. the stationary installation for hip fracture according to claim 1 and 2, it is characterised in that, the two side faces of this lesser trochanter flank section has a curvature, and the radius-of-curvature of this curvature is between 30mm��300mm.

5. the stationary installation for hip fracture according to claim 1 and 2, it is characterised in that, the angular range of this head and this hollow sleeve is between 125 degree��150 degree.

6. the stationary installation for hip fracture according to claim 1, it is characterised in that, the variation in thickness of this lesser trochanter flank section is between 1.5��2mm.

7. the stationary installation for hip fracture according to claim 1, it is characterised in that, the plurality of perforation and this at least one hip screw hole are screw form.

8. the stationary installation for hip fracture according to claim 1, it is characterised in that, this pilot hole ovalize.

9. the stationary installation for hip fracture according to claim 1, it is characterised in that, the shape in this body portion is symmetrical.

10. the stationary installation for hip fracture according to claim 1, it is characterised in that, this head has at least 3 perforation.

11. stationary installations for hip fracture according to claim 1, it is characterised in that, this head has 4 perforation further.

12. stationary installations for hip fracture according to claim 1, it is characterised in that, this body portion has at least 4 perforation and 1 pilot hole.

13. stationary installations for hip fracture according to claim 1, it is characterised in that, the head of this device is provided with again multiple open-work further through the first side of this device and two side faces.