CN215937823U

CN215937823U - Hip joint femoral head extractor

Info

Publication number: CN215937823U
Application number: CN202121945810.6U
Authority: CN
Inventors: 李涛; 姜雅萍
Original assignee: Affiliated Hospital of University of Qingdao
Current assignee: Affiliated Hospital of University of Qingdao
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-03-04
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses a hip joint femoral head extractor which comprises a T-shaped handle, wherein the tip part of the T-shaped handle is provided with a full thread, the root of the full thread part of the T-shaped handle is sleeved with an anti-rotation sleeve, and the anti-rotation sleeve is provided with an upright post; preformed holes are respectively formed in two sides of a handle part of the T-shaped handle, and a full-thread screw is arranged in each preformed hole. According to the utility model, the anti-rotation sleeve and the full-thread screw structure are additionally arranged, so that the femoral head can be prevented from rotating when the T-shaped handle is screwed into the femoral head; meanwhile, the full-thread screw is drilled into the femoral head, and forms a three-in-one claw-shaped structure with the thread of the full-thread handle, so that the holding force is improved. For osteoporotic femoral heads and femoral heads clamped in acetabulum, the holding force and the anti-rotation force are stronger, so that the femoral heads can be taken out more easily, the difficulty in taking out the femoral heads is reduced, the operation time of the total hip replacement operation is greatly shortened, and the postoperative recovery of patients is facilitated.

Description

Hip joint femoral head extractor

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a hip joint femoral head extractor.

Background

For patients with late stage femoral head necrosis and osteoarthritis or patients with femoral neck fracture, a total hip replacement operation is needed to solve the pain of the patients, improve the hip joint function and further improve the life quality. Total hip replacement after skin, subcutaneous tissue, fascia lata and muscle are exposed, the bony structures of the hip joint are exposed, and further, the neck of the femur needs to be cut off, the femoral head is taken out, and the next operation is performed.

The currently used femoral head extraction instrument is a simple T-shaped handle, and an operator extracts the femoral head after screwing or knocking the tip of the T-shaped handle into the femoral head. The traditional T-shaped handle for the femoral head is not easy and convenient to take out the femoral head, and the reason can be attributed to the following two points: first, the anti-rotational force is insufficient. In the process of screwing the T-shaped handle, as the femoral head is circular, the femoral head is easy to rotate and move in the acetabulum, so that the position of the femoral head is always changed when the T-shaped handle is screwed in, and an assistant is required to fix the femoral head by using other instruments; second, the holding force is insufficient. For the old femoral neck fracture patient, as the bone in the femoral head is loose, the T-shaped handle is difficult to form a strong holding force, and after the T-shaped handle is screwed in, the T-shaped wrench is easy to pull out from the cancellous bone of the femoral head by a little force, so that the femoral head is difficult to take out; in addition, for a patient with advanced femoral head necrosis, the femoral head is seriously deformed and is clamped in the acetabulum, and the holding force of a simple traditional T-shaped handle is not enough to extract the femoral head.

Disclosure of Invention

The utility model aims to provide a hip joint femoral head extractor, which can prevent the femoral head from rotating when a T-shaped handle is screwed into the femoral head by additionally arranging an anti-rotation sleeve and a full-thread screw structure; meanwhile, the full-thread screw is drilled into the femoral head, the contact area between the full-thread screw and the interior of the femoral head is increased, a three-in-one claw-shaped structure is formed by the full-thread screw and the thread of the full-thread handle, and the holding force is improved.

In order to achieve the technical purpose, the technical scheme of the utility model is as follows:

a hip joint femoral head extractor comprises a T-shaped handle, wherein the tip part of the T-shaped handle is provided with a full thread, the root part of the full thread part of the T-shaped handle is sleeved with an anti-rotation sleeve, and the anti-rotation sleeve is provided with an upright post; preformed holes are respectively formed in two sides of a handle part of the T-shaped handle, and a full-thread screw is arranged in each preformed hole.

Furthermore, three upright posts on the anti-rotation sleeve are arranged, face one side of the tip part of the T-shaped handle and are evenly arranged at intervals in the circumferential direction.

Further, the preformed hole is obliquely arranged, so that the full-thread screws on two sides and the tip part of the T-shaped handle form a three-in-one 'claw' type structure after penetrating into the preformed hole.

Further, the length of the upright post is 0.8-1.2 cm.

Further, a rough texture is preset on the handle part of the T-shaped handle.

Firstly, the anti-rotation sleeve is provided with 3 upright columns with the length of about 1cm, the upright columns can be driven into the femoral neck, and the sleeve can prevent the femoral head from rotating when the T-shaped handle is screwed in next step.

Secondly, the T-shaped full-spiral handle penetrates through the anti-rotation sleeve, and can be screwed into full threads according to the size of the femoral head, so that the friction force and the holding force between the T-shaped handle and bone in the femoral head are increased. The T-shaped handle is provided with rough texture in advance, which is helpful for the hand of the operator to hold.

Finally, two full-thread screws can be screwed into the femoral head along the reserved holes on the T-shaped handle, 2 screws and the far end of the T-shaped handle are all at an angle of 30 degrees, 2 full-thread screws and the T-shaped full-spiral handle form a three-in-one structure, the holding force is stronger, the rotating force is stronger, the rotation is not easy to loosen, and the femoral head is easier to take out.

Compared with the prior art, the utility model has the following advantages and positive effects:

on the basis of the original traditional T-shaped handle, the device is further improved and upgraded, the holding force and the anti-rotation force of the femoral head with osteoporosis and the femoral head clamped in the acetabulum are stronger, and the femoral head can be taken out more easily, so that the difficulty in taking out the femoral head is reduced, the operation time of the total hip joint replacement operation is greatly shortened, and the postoperative recovery of a patient is facilitated.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of an embodiment of a hip joint femoral head extractor of the utility model;

symbols in the drawings and description thereof: 10. a T-shaped handle; 11. a tip portion; 12. a handle portion; 13. reserving a hole; 14. reserving a hole; 20. an anti-rotation sleeve; 21. a column; 30, of a nitrogen-containing gas; a full-thread screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

Referring to fig. 1, which is a schematic structural view of an embodiment of a hip joint femoral head extractor according to the present invention, the hip joint femoral head extractor includes a T-shaped handle 10, the T-shaped handle includes a tip portion 11 with a full thread and a handle portion 12, an anti-rotation sleeve 20 is sleeved on a root portion of the full thread of the T-shaped handle, three columns 21 with a length of 1cm are provided on the anti-rotation sleeve 20, and the three columns 21 face one side of the tip portion of the T-shaped handle and are uniformly spaced in a circumferential direction. Preformed

holes

13 and 14 are respectively formed in two sides of the handle part of the T-shaped handle, and a full-thread screw 30 is arranged in each preformed hole. The prepared

holes

13, 14 are obliquely arranged, so that the full thread screws 30 on two sides form a three-in-one 'claw' type structure with the tip part 11 of the T-shaped handle after penetrating into the prepared holes. The handle part 12 of the T-shaped handle is preset with rough texture, which is helpful for holding hands of an operator.

The hip joint femoral head extractor with the structure has the following advantages:

the anti-rotation is stronger: the anti-rotation sleeve is provided with 3 upright columns with the length of 1cm, the 3 upright columns are driven into the femoral neck, and when the T-shaped handle is screwed in again, the sleeve outside can prevent the femoral head from rotating.

The holding force is stronger: the full thread tip part of the T-shaped handle increases the contact area and holding force with cancellous bone inside the femoral head; the full-thread screw is simultaneously drilled into the femoral head, so that the contact area with cancellous bone inside the femoral head is increased, and the holding force is stronger; the three parts finally form a three-in-one claw-shaped structure, so that the femoral head is integrally held, the holding force is stronger, and the femoral head is easier to take out.

In the operation, after the femoral neck is cut off, 3 upright posts 21 of the anti-rotation sleeve 20 are implanted into the interface of the femoral neck, so that the upright posts 21 are completely sunk into bone, then an operator holds the handle part 12, takes the T-shaped full-thread wrench 10, screws the tip part 11 of the T-shaped handle into the femoral head in the anti-rotation sleeve 20, and then takes two full-thread screws 30 to screw into the femoral head along the two prepared

holes

13 and 14 respectively. The surgeon then holds the handle portion 12, rotates and pulls the femoral head outward, and withdraws the femoral head.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. A hip joint femoral head extractor comprises a T-shaped handle, and is characterized in that: the T-shaped handle is characterized in that the tip part of the T-shaped handle is provided with a full thread, the root of the full thread part of the T-shaped handle is sleeved with an anti-rotation sleeve, and the anti-rotation sleeve is provided with an upright post; preformed holes are respectively formed in two sides of a handle part of the T-shaped handle, and a full-thread screw is arranged in each preformed hole.

2. The hip joint femoral head extractor of claim 1, wherein: the three upright posts on the anti-rotation sleeve face one side of the tip part of the T-shaped handle and are evenly arranged at intervals in the circumferential direction.

3. The hip joint femoral head extractor of claim 1, wherein: the preformed hole is obliquely arranged, so that after the full-thread screws on two sides penetrate into the preformed hole, a three-in-one 'claw' type structure is formed by the full-thread screws and the tip part of the T-shaped handle.

4. The hip joint femoral head extractor of claim 1, wherein: the length of the upright post is 0.8-1.2 cm.

5. The hip joint femoral head extractor of claim 1, wherein: the handle part of the T-shaped handle is preset with rough texture.