Implanting device for fixing femur

Abstract

The utility model discloses an implanting device for fixing thighbone, which belongs to the technical field of medical instruments and comprises an implanting nail, a nail sleeve is sleeved outside the implanting nail in a sliding manner, a nail head is fixedly arranged at a first end of the implanting nail, a first end of the nail sleeve is abutted against the nail head, a threaded rod is fixedly arranged at a second end of the implanting nail, and the threaded rod is connected with the implanting nail. A threaded sleeve in threaded connection with the threaded rod is movably mounted in the second end of the nail sleeve, an expansion part is arranged at the position, close to the first end of the implanting nail, of the nail sleeve, and the expansion part comprises a plurality of deformable side wings arranged in the circumferential direction with the axis of the nail sleeve as the center; the screw sleeve can move in the axis direction of the screw sleeve by rotating the threaded sleeve so that the deformable side wings can be unfolded or contracted. According to the utility model, the interior of the bone is fixed through the deformable side wings, so that the femoral head is prevented from rotating when a screw is screwed in for fixing; and when the deformable side wings bulge to compact the femoral head, the rotation of the implanting nail and the nail sleeve can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to an implant device for femur fixation. BACKGROUND

[0002] When femoral neck and femoral body are fractured, or patients suffer from osteoporosis, intramedullary nail is generally used as internal fixation instrument for fracture.

[0003] The prior art such as Chinese patent with announcement number CN 102596060 B discloses an improved hip fracture nail system, which is fixed at the fracture position through a screw, however, the screw is prone to rotating the femoral head during screwing.

[0004] Therefore, an implant device for femur fixation needs to be provided to solve the above problems. CONTENT OF UTILITY MODEL

[0005] Therefore, the utility model aims at providing an implant device for femur fixation to solve the problem that the screw rotation causes poor stability of the femoral head when the screw is used to fix the fracture position in the prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The utility model provides an implant device for femur fixation, including implant nail, the implant nail outside slidingly covers the nail cover, the implant nail first end is fixedly provided with the nail head, the nail cover first end is in butt joint with the nail head, the implant nail second end is fixedly provided with the threaded rod, the threaded sleeve that is screwly connected with the threaded rod is movably installed in the inside of the nail cover second end, the nail cover is close to the implant nail first end and is provided with the expansion part, the expansion part includes a plurality of deformable side wings that are circumferentially arranged with the nail cover axis as the center, the threaded sleeve can make the nail cover move along the nail cover axis direction to make the deformable side wing expand or contract.

[0008] Further, the two ends of the deformable side wing and the connection of the nail cover form the first gap that is communicated with the outside of the nail cover to make the thickness of the two ends of the deformable side wing and the connection of the nail cover less than the thickness of the deformable side wing, and the middle part of the deformable side wing is provided with the second gap that is communicated with the inside of the nail cover to make the thickness of the middle part of the deformable side wing less than the thickness of the deformable side wing.

[0009] Further, the nail cover is provided with the mounting hole matched with the implant nail, the nail cover second end is provided with the installation slot coaxially arranged with the mounting hole, the diameter of the installation slot is greater than the diameter of the mounting hole, the threaded sleeve is rotatably installed in the installation slot, one end of the threaded sleeve is in abutment with the side wall of the installation slot close to the nail head, and the threaded rod extends to the installation slot away from the nail head end and is screwly connected with the threaded sleeve.

[0010] Further, the side wall of the nail cover is provided with a limiting slot in communication with the mounting hole, and the implanting nail is provided with a limiting rod, which is axially and slidingly connected in the limiting slot.

[0011] Further, the side wall of the nail cover is provided with two limiting slots symmetrically arranged about the nail cover axis, the implanting nail is provided with a through hole radially penetrating the implanting nail, and the limiting rod is mounted in the through hole, and two ends of the limiting rod extend into the limiting slots on both sides of the nail cover.

[0012] Further, the implanting nail is provided with a through hole axially penetrating the implanting nail.

[0013] Further, the middle part of the deformable side wing is provided with a through hole in communication with the second notch.

[0014] Further, the number of the deformable side wings is eight.

[0015] Further, the threaded sleeve is provided with an internal hexagonal hole away from the nail head end.

[0016] The beneficial effects of the present application are as follows:

[0017] The deformable side wing is used for fixing the inside of the bone, avoiding the rotation of the femoral head caused by screwing in the fixing mode, and improving the stability of the femoral head in the treatment process.

[0018] The other advantages, objects and features of the present application will be described in the following specification, and will be apparent to those skilled in the art to some extent, or can be taught by those skilled in the art from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purpose, technical scheme and beneficial effects of the present application more clear, the present application provides the following drawings for explanation:

[0020] Fig. 1 It is a sectional view of the overall structure of the embodiment of the present application.

[0021] Fig. 2 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0022] Fig. 3 It is a schematic diagram of the implanting nail structure of the embodiment of the present application.

[0023] The marks in the drawings are as follows: implant nail 1, nail head 101, limiting rod 102, through hole 103, threaded rod 104, nail sleeve 2, deformable side wing 201, second notch 202, mounting hole 203, mounting groove 204, limiting groove 205, first notch 206, through hole 207, threaded sleeve 3, internal hexagonal hole 301. DETAILED DESCRIPTION

[0024] As Figs. 1-3 shown, the utility model provides a kind of implant device for femur fixation, comprising: implant nail 1, the implant nail 1 outside is equipped with nail sleeve 2, the nail sleeve 2 is limit sliding connection with implant nail 1, the implant nail 1 first end is fixedly provided with nail head 101, the nail sleeve 2 first end is in abutment with nail head 101, the implant nail 1 second end is fixedly provided with threaded rod 104, the threaded sleeve 3 is movably installed in the second end inside of nail sleeve 2, the threaded sleeve 3 is screw connection with threaded rod 104, the nail sleeve 2 is close to the first end of implant nail 1 and is provided with expansion part, the expansion part includes the deformable side wing 201 that is arranged in the circumferential direction with the axis of nail sleeve 2 as center, rotating the threaded sleeve 3 can make nail sleeve 2 move along the axis direction of nail sleeve 2 to make deformable side wing 201 unfold or shrink.

[0025] In the scheme, before treatment, deformable side wing 201 on nail sleeve 2 is in shrinkage state, the maximum circumferential diameter formed by deformable side wing 201 in shrinkage state is less than or equal to the diameter of nail sleeve 2;During treatment, implant nail 1 is inserted into the fracture site of femur from nail head 101 until extending into fractured femoral head, and drives nail sleeve 2 and threaded sleeve 3 to be inserted into femur synchronously, then rotates threaded sleeve 3, makes threaded sleeve 3 move along the axis of threaded rod 104 to the direction close to nail head 101, thereby driving nail sleeve 2 to slide to the direction close to nail head 101, because multiple deformable side wings 201 are provided on nail sleeve 2, when nail sleeve 2 moves along the axis of nail sleeve 2, deformable side wing 201 can be unfolded and bulged to compact bone, to play internal fixation effect;Wherein, the number of deformable side wing 201 is eight.

[0026] The scheme fixes the inside of bone through deformable side wing 201, avoids femoral head rotation caused by screwing in fixation mode, improves the stability of femoral head during treatment;It is suitable for bone fixation of osteoporosis at the same time.

[0027] In one embodiment of this utility model, the thickness of the connection points between the two ends of the deformable wing 201 and the nail sleeve 2 is less than the thickness of the deformable wing 201. A first notch 206 communicating with the outside of the nail sleeve 2 is formed at the connection points between the two ends of the deformable wing 201 and the nail sleeve 2. A second notch 202 communicating with the inside of the nail sleeve 2 is provided in the middle of the deformable wing 201, so that the thickness of the middle part of the deformable wing 201 is less than the thickness of the deformable wing 201. This allows the middle part of the deformable wing 201 to bulge and deform when it unfolds, thereby compressing and fixing the femoral head. Furthermore, when the deformable wing 201 bulges and compresses the femoral head, it effectively prevents the rotation of the implanted nail 1 and the nail sleeve 2, improving the stability of the implantation device.

[0028] In one embodiment of this utility model, the nail sleeve 2 is provided with an installation hole 203 that mates with the implanted nail 1. The second end of the nail sleeve 2 is provided with an installation groove 204 coaxially arranged with the installation hole 203. The diameter of the installation groove 204 is larger than the diameter of the installation hole 203. The threaded sleeve 3 is rotatably installed within the installation groove 204. One end of the threaded sleeve 3 abuts against the side wall of the installation groove 204 near the nail head 101. The threaded rod 104 extends away from the nail head 101 and into the installation groove 204, where it is threadedly connected to the threaded sleeve 3. This allows the nail sleeve 2 to slide axially when the threaded sleeve 3 is rotated, ensuring the integrity of the implanted nail 1, nail sleeve 2, and threaded sleeve 3 when the implanted nail 1 is inserted, and facilitating the installation and removal of the implanted nail 1, nail sleeve 2, and threaded sleeve 3.

[0029] In one embodiment of this utility model, the side wall of the nail sleeve 2 is provided with a limiting groove 205 communicating with the mounting hole 203, and the implanted nail 1 is provided with a limiting rod 102. The limiting rod 102 is slidably connected to the limiting groove 205 along the axial direction of the implanted nail 1. This allows the nail sleeve 2 and the implanted nail 1 to slide in a limited manner, and also restricts the deployment range of the deformable side wings 201.

[0030] In one embodiment of this utility model, the side wall of the nail sleeve 2 is provided with two limiting grooves 205 symmetrically arranged about the axis of the nail sleeve 2. The implanted nail 1 is provided with a through hole that radially penetrates the implanted nail 1. The limiting rod 102 is installed in the through hole, and both ends of the limiting rod 102 extend into the limiting grooves 205 on both sides of the nail sleeve 2. This facilitates the installation and removal of the limiting rod 102 and improves the stability of the limiting.

[0031] In one embodiment of this invention, the implanted nail 1 is provided with a through hole 103 that axially penetrates the implanted nail 1, in order to reduce the weight of the implanted nail 1.

[0032] In one embodiment of this utility model, a through hole 207 communicating with the second notch 202 is provided in the middle of the deformable side wing 201. This improves the deformability of the middle part of the deformable side wing 201 while ensuring the thickness of the middle part.

[0033] In one embodiment of this utility model, the threaded sleeve 3 is provided with an internal hexagonal hole 301 at the end away from the nail head 101 for connecting an external handle to assist the rotation of the threaded sleeve 3.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. An implantable device for femoral fixation, comprising an implant screw, characterized in that: The implanted staple is slidably fitted with a staple sleeve. A staple head is fixedly provided at the first end of the implanted staple. The first end of the staple sleeve abuts against the staple head. A threaded rod is fixedly provided at the second end of the implanted staple. A threaded sleeve that is threadedly connected to the threaded rod is movably installed inside the second end of the staple sleeve. An extension portion is provided on the staple sleeve near the first end of the implanted staple. The extension portion includes a plurality of deformable side wings arranged circumferentially around the axis of the staple sleeve. Rotating the threaded sleeve can cause the staple sleeve to move along the axis of the staple sleeve so that the deformable side wings can be expanded or contracted.

2. The implantable device for femoral fixation according to claim 1, characterized in that: The two ends of the deformable side wing are connected to the nail sleeve at the connection points, forming a first notch that communicates with the outside of the nail sleeve so that the thickness of the connection points between the two ends of the deformable side wing and the nail sleeve is less than the thickness of the deformable side wing. The middle part of the deformable side wing is provided with a second notch that communicates with the inside of the nail sleeve so that the thickness of the middle part of the deformable side wing is less than the thickness of the deformable side wing.

3. The implantable device for femoral fixation according to claim 2, characterized in that: The sleeve has an installation hole that mates with the implanted nail. The second end of the sleeve has an installation groove that is coaxial with the installation hole. The diameter of the installation groove is larger than the diameter of the installation hole. The threaded sleeve is rotatably installed in the installation groove. One end of the threaded sleeve abuts against the side wall of the installation groove near the nail head. The threaded rod extends from the end away from the nail head into the installation groove and is threadedly connected to the threaded sleeve.

4. The implantable device for femoral fixation according to claim 3, characterized in that: The side wall of the nail sleeve is provided with a limiting groove that communicates with the mounting hole, and the implanted nail is provided with a limiting rod. The limiting rod is slidably connected in the limiting groove along the axial direction of the implanted nail.

5. The implantation device for femoral fixation according to claim 4, characterized in that: The side wall of the nail sleeve is provided with two limiting grooves symmetrically arranged about the axis of the nail sleeve. The implanted nail is provided with a through hole that penetrates the implanted nail radially. The limiting rod is installed in the through hole, and the two ends of the limiting rod extend into the limiting grooves on both sides of the nail sleeve.

6. The implantable device for femoral fixation according to claim 5, characterized in that: The implanted pin has a through hole that axially penetrates the implanted pin.

7. The implantable device for femoral fixation according to claim 6, characterized in that: The deformable side wing has a through hole in the middle that communicates with the second notch.

8. The implantable device for femoral fixation according to claim 7, characterized in that: The number of deformable side wings is 8.

9. The implantable device for femoral fixation according to claim 1, characterized in that: The threaded sleeve has an internal hexagonal hole at the end away from the nail head.

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