CN205107866U - Fixing device for hip fracture - Google Patents

Abstract

The utility model provides a fixation device for hip fracture, which includes: a head, a hollow sleeve, a lesser trochanter wing, a body, a first side and a second side, wherein the head is an arc panel body and is provided with a hip screw hole; the above-mentioned hollow sleeve is arranged on the above-mentioned head; the lesser trochanter wing is connected to the head. The above-mentioned body is a rectangular plate body, and the head, the hollow sleeve, the lesser trochanter wing, and the body are integrally formed in sequence; the first side and the second side are respectively located on the outside and the inside of the above-mentioned device, wherein the device is provided with eight through holes and a positioning hole penetrating the first side and the second side of the device; wherein the hollow sleeve is arranged on the second side of the head and is connected with the hip screw hole.

Description

A fixation device for hip fracture

technical field

The utility model relates to a fixing device, in particular to a fixing 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.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a hip fracture fixation device that can fit on the bone and is aimed at broken bones or fractures 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 utility model and the bone is reduced, there will be a gap between the device and the bone, which can eliminate possible complications (such as bacterial infection, slow fracture healing, fixation failure, etc.) ), can also improve the blood transport of the affected area and the recovery and growth of the periosteum.

Another object of the present utility model 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 Finally, 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 suitable for 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 utility model, a fixation device for hip fractures of the utility model includes: a head, a hollow sleeve, a flank of the lesser trochanter, a body, a first side and A second side, the head is an arc plate body with a hip screw hole; the above-mentioned hollow sleeve is arranged on the above-mentioned head; the wing of the lesser trochanter is connected with the head. The above-mentioned body is a rectangular plate body, and the head, the hollow sleeve, the flanks of the lesser trochanter, 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. The device is provided with eight perforations and a positioning hole through the first side and the second side of the device; the hollow sleeve is arranged on the second side of the head and communicates with the hip screw hole; the lesser trochanter The second side of the wing part has a curvature; the angle between the head part and the hollow sleeve is between 125 degrees and 150 degrees.

In the second viewpoint of the utility model, the utility model 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, and the manufacturing method is First, the surface layer of the device is removed by sand blasting and pickling, and then the holes in the device after sand blasting and pickling are partially repaired by laser, and then the surface of the device is ground to reduce the roughness of the device surface. The surface is polished, and finally the surface is modified so that the surface of the fixation device for hip fracture has a wear-resistant and anti-oxidation layer. In one embodiment, the material of the above-mentioned device may be titanium or titanium 6 aluminum 4 vanadium (Ti6Al4V). In an embodiment, the material of the above-mentioned device may be steel.

Preferably, the above-mentioned perforation and hip screw holes are in the form of screw holes.

Preferably, the positioning hole is oval.

In some embodiments, the radius of curvature of the second side curvature of the lesser trochanter wing 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 some embodiments, after the above-mentioned sliding hip screw fixation is completed, the hip fracture fixation device can be fixed by fastening the bone nail or positioning bone screw through the positioning hole, and then using the bone screw or positioning bone screw as a sliding bar, The positioning hole is used as a chute, so that the hip fracture fixation device can be displaced on the proximal femur to a certain extent, and supports the proximal femur (such as the greater trochanter, Greattrochanter) through the head of the hip fracture fixation device and the flanks of the lesser trochanter and the lesser trochanter, and then fasten 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 utility model are illustrated by examples in the following drawings, but are not intended to limit the present utility model. 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

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

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

The utility model is a hip fracture fixation device 100, as shown in Fig. 1 and Fig. 2, the aforementioned device includes: a head 102, a body 104, a wing of the lesser trochanter 106, a hollow sleeve 108, a first The side 110 and a second side 112, the head 102 is an arc plate body with a hip screw hole 114; the above-mentioned hollow sleeve 108 is set 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 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 above-mentioned device is provided with eight perforations 116 and a positioning hole 118 through the first side and the second side of the device; the above-mentioned hollow sleeve is arranged on the second side of the head and is connected with the hip screw hole In one embodiment, Fig. 2 is a side view of the hip fracture fixation device, and the second side of the lesser trochanter wing portion 106 has a curvature; in one embodiment, the head of the device and the hollow sleeve The angle range between the tubes 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 is three. In some embodiments, the above-mentioned eight through holes 112 and the wall of the above-mentioned hip screw hole are threaded; and the positioning hole 118 is oval and located on 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 and FIG. 4 , the utility model is an embodiment in which the fixing device is attached to the proximal end of the femur. After the sliding hip screw is implanted into the hip fracture site, it is necessary to adjust the angle between the head 102 of the device and the hollow sleeve 108 according to the implantation angle of the sliding hip screw, and then insert the hollow sleeve 108 The end of the sliding hip screw is implanted into the hollow sleeve 108 to the hip fracture site, and finally a fixing component (such as a screw) is locked in the hip screw hole 114, so that the sliding hip screw 402 is closely combined with the device to achieve fixation Effect.

In one embodiment, after the above-mentioned device is fixed, 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 402 It presents a zigzag arrangement with the locking screw 404 to enhance the fixing effect of the device.

In some embodiments, the aforementioned body 104 has a left-right symmetrical shape.

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

In one embodiment, the head has 4 perforations. In one embodiment, the radius of curvature of the second lateral 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 , a fixation device for a hip fracture is shown, and the second lateral curvature of the body of the hip fracture fixation device corresponds to the gentler surface curvature of the femoral diaphysis; 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 shaft. 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 eight 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 of the hip joints present a shape of staggered or parallel arrangement, 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 of the device, the flanks of the lesser trochanter and the body respectively correspond to the curvature of the proximal femur, the bone screw can be positioned by positioning The hole is drilled near the fracture site of the femoral diaphysis, and can be movably pierced into the positioning hole of the hip fracture fixation device, while other multiple bone nails are respectively pierced into multiple perforation holes, and the positioning holes can be locked on the lock. The bone nails are then used for positioning purposes, and are reset and adjusted. The position and placement angle of the hip fracture fixation device are slightly adjusted and fixed according to the positions to be fixed by other multiple bone nails.

The above descriptions are preferred embodiments of the present utility model. Those skilled in the art should be able to understand that it is used to illustrate the utility model rather than to limit the patent protection scope claimed by the utility model. The scope of its patent protection should be determined according to the patent application scope of the utility model and its equivalent field. 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 changes or designs completed under the spirit disclosed in this utility model, and should be included in the scope of this utility model. within the scope of patent protection.

Claims (9)

1. A fixation device for hip fracture, comprising: A head, which is a curved panel body, is provided with a hip screw hole in the head; a hollow sleeve disposed on the head; a small trochanter flank attached to the head; A body, which is a rectangular plate body, and the head, the flanks of the lesser trochanter, the hollow sleeve and the body are sequentially integrally formed; a first side, on the outside of the device; and A second side, on the inner side of the device; the device is provided with eight perforations and a positioning hole through the first side and the second side of the device; the hollow sleeve is arranged on the second side of the head and It communicates with the hip screw hole; the second side of the lesser trochanter wing has a curvature; the angle between the head and the hollow sleeve is between 125 degrees and 150 degrees. 2 . The fixation device for hip fracture according to claim 1 , wherein the eight perforations and the hip screw holes are in the form of screw holes. 3 . 3. The fixation device for hip fracture according to claim 1, wherein the positioning hole is oval. 4 . The fixation device for hip fracture according to claim 1 , wherein the radius of curvature of the second lateral curvature of the lesser trochanter flank is between 30 mm and 300 mm. 5. The fixation device for hip fracture according to claim 1, wherein the shape of the body is left-right symmetrical. 6. The fixation device for hip fracture according to claim 1, wherein the head has 4 perforations. 7. The fixation device for hip fracture according to claim 1, wherein the body has 5 perforations and 1 positioning hole. 8 . The fixation device for hip fracture according to claim 1 , wherein the thickness of the lateral wing of the lesser trochanter varies between 1.5 mm and 2 mm. 9. The fixation device for hip fracture according to claim 1, characterized in that, the head of the device is further provided with three through holes penetrating through the first side and the second side of the device.