A femoral neck osteotomy device for hip replacement

Abstract

This utility model relates to the field of osteotomy devices, and discloses a femoral neck osteotomy device for hip replacement, including a fixing sleeve. A support frame is fixedly connected to the outer wall of the fixing sleeve near the front end. A rotating sleeve is hinged to the inner wall of the support frame near the rear end. A limiting component is provided on the inner wall of the support frame. The limiting component includes a stop block, which is fixedly connected to the inner wall of the support frame. A serrated block is provided on the outer side of the rotating sleeve near the front end. The rear surface of the stop block penetrates and is slidably connected to the limiting block. The limiting block and the stop block are elastically connected by a limiting spring. Multiple sets of fixing sleeves and rotating sleeves are provided. In this utility model, by setting the limiting component, the entire device can be fixed at the predetermined osteotomy position using the fixing sleeve and rotating sleeve during cutting, and then cutting can be performed along the cutting groove. This guides the cutting and ensures the flatness of the cut surface.

Description

Technical Field

[0001] This utility model relates to the field of osteotomy devices, and more particularly to a femoral neck osteotomy device for hip replacement. Background Technology

[0002] When performing total hip replacement or artificial femoral head replacement, after hip dislocation, it is necessary to use an oscillating saw to cut the femoral neck. In current technology, freehand osteotomy is generally used, where the doctor directly operates the saw blade to cut back and forth to achieve separation.

[0003] Manual osteotomy requires a high level of skill from the operator, demanding precise cutting to ensure a smooth cut surface. Uneven cut surfaces necessitate multiple adjustments, increasing osteotomy time and the risk of infection. While surgical retractors can protect surrounding soft tissues during osteotomy, the area around the femoral neck is particularly vulnerable after femoral head dislocation, especially on the contralateral side, creating a blind spot. Unstable manual osteotomy techniques can easily damage these soft tissues. Therefore, a femoral neck osteotomy device for hip replacement is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a femoral neck osteotomy device for hip replacement, which aims to improve the problem in the prior art that "manual osteotomy requires high skill from the operator and it is difficult for novices to complete the osteotomy quickly and safely".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a femoral neck osteotomy device for hip replacement, comprising a fixing sleeve, a support frame fixedly connected to the outer wall of the fixing sleeve near the front end, a rotating sleeve hinged to the inner wall of the support frame near the rear end, a limiting component provided on the inner wall of the support frame, the limiting component including a stop block fixedly connected to the inner wall of the support frame, a serrated block provided on the outer side of the rotating sleeve near the front end, a limiting block slidably connected through the rear surface of the stop block, the limiting block and the stop block being elastically connected by a limiting spring, multiple sets of fixing sleeves and rotating sleeves being provided, the multiple sets of fixing sleeves and rotating sleeves being symmetrically arranged about the center line of the support frame as the axis of symmetry, a cutting groove being provided at the middle position of two sets of rotating sleeves, a guide frame fixedly connected to the front end of the support frame, and a locking component provided on the inner wall of the guide frame.

[0006] As a further description of the above technical solution:

[0007] The limiting block is configured in a U-shape.

[0008] As a further description of the above technical solution:

[0009] A pull rod is fixedly connected to the front end of the limiting block, and a lever is fixedly connected to the front end of the pull rod.

[0010] As a further description of the above technical solution:

[0011] The lever is slidably connected to the inner wall of the guide frame, and the lever is H-shaped.

[0012] As a further description of the above technical solution:

[0013] The locking assembly includes a slide groove disposed on the inner wall of the guide frame, and the toggle block slides on the inner wall of the slide groove.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the groove is slidably connected to a locking block.

[0016] As a further description of the above technical solution:

[0017] The front end of the locking block is rotatably connected to a support screw, which passes through and is threadedly connected to the front end of the guide frame. A knob is fixedly connected to the front end of the support screw.

[0018] As a further description of the above technical solution:

[0019] The outer wall of the fixing sleeve is provided with fixing holes, and there are multiple sets of them.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by setting a limiting component, the entire device can be fixed at the predetermined osteotomy position by first using the fixed sleeve and rotating sleeve during cutting, and then cutting can be carried out along the cutting groove. This can guide the cutting and ensure the flatness of the cut surface. At the same time, the stop block and support frame can assemble the saw blade, which can prevent the saw blade from moving excessively and damaging the soft tissue. The entire device can reduce the difficulty of osteotomy operation.

[0022] 2. In this utility model, by setting a locking component, after the whole device is fixed at the osteotomy position, the knob can be rotated to drive the support screw to move into the guide frame. The support screw will drive the locking block to press against the front end of the lever. At this time, the lever will be restricted from moving forward. This can prevent the whole device from being accidentally unlocked due to vibration during the osteotomy process, and the overall device has good safety. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0024] Figure 2This is a three-dimensional structural breakdown diagram of the overall device in this utility model;

[0025] Figure 3 This is a three-dimensional cross-sectional view of the limiting component in this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of Embodiment 2 of this utility model.

[0027] Legend:

[0028] 1. Fixed sleeve; 2. Rotating sleeve; 3. Cutting groove; 4. Support frame; 5. Limiting component; 51. Serrated block; 52. Stop block; 53. Limiting block; 54. Limiting spring; 55. Pull rod; 56. Toggle block; 57. Guide frame; 6. Locking component; 61. Slide groove; 62. Locking block; 63. Support screw; 64. Knob; 7. Fixing hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1:

[0031] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a femoral neck osteotomy device for hip replacement, comprising a fixed sleeve 1 for supporting the overall device. A support frame 4 for blocking a saw blade is fixedly connected to the outer wall of the fixed sleeve 1 near its front end. A rotating sleeve 2 for fixing the overall device is hinged to the inner wall of the support frame 4 near its rear end. A limiting component 5 for restricting the free rotation of the rotating sleeve 2 is provided on the inner wall of the support frame 4. The limiting component 5 includes a stop block 52 for cooperating with the support frame 4 to block the saw blade. By setting the support frame 4 and the stop block 52, the saw blade can be blocked to prevent excessive cutting and soft tissue damage. The stop block 52 is fixed... A serrated block 51 is fixedly connected to the inner wall of the support frame 4. A serrated block 51 is provided on the outer side of the rotating sleeve 2 near the front end. A limiting block 53 for blocking the serrated block 51 is slidably connected through the rear surface of the stop block 52. By using the limiting block 53 to block the serrated block 51, the rotating sleeve 2 can be prevented from rotating outward at will. When the rotating sleeve 2 rotates inward to lock, the serrated block 51 can squeeze the limiting block 53 to make it retract into the interior of the stop block 52. The limiting block 53 and the stop block 52 are elastically connected by a limiting spring 54. The limiting spring 54 will push the limiting block 53 backward at all times, so that the limiting block 53 can be locked into the interior of the serrated block 51 in time.

[0032] Reference Figure 1 - Figure 3 The fixed sleeve 1 and rotating sleeve 2 are provided in multiple sets. The multiple sets of fixed sleeve 1 and rotating sleeve 2 are symmetrically arranged with the center line of the support frame 4 as the axis of symmetry. The two sets of rotating sleeve 2 can rotate separately, so that bones of different thicknesses can be fixed. The middle position of the two sets of rotating sleeve 2 is set as a cutting groove 3 to guide the saw blade through. The front end of the support frame 4 is fixedly connected to a guide frame 57 to guide the movement of the pry block 56. The inner wall of the guide frame 57 is provided with a locking component 6 to limit the limiting component 5.

[0033] Reference Figure 1 - Figure 3 The limiting block 53 is U-shaped, and the central groove of the limiting block 53 corresponds to the cutting groove 3. This design can prevent the limiting block 53 from moving forward due to the saw blade squeezing. The front end of the limiting block 53 is fixedly connected to a pull rod 55 for moving the limiting block 53. The front end of the pull rod 55 is fixedly connected to a lever 56. By moving the lever 56, the pull rod 55 can be moved forward, and the pull rod 55 will move the limiting block 53 forward, thus releasing the fixation of the rotating sleeve 2. The lever 56 passes through and slides on the inner wall of the guide frame 57. The lever 56 is H-shaped, which allows the operator to easily unlock the guide frame 57 from both sides. The locking component 6 includes a slide groove 61 for accommodating the locking block 62. The slide groove 61 is located on the inner wall of the guide frame 57. The lever 56 slides on the inner wall of the slide groove 61, and the slide groove 61 can guide the lever 56 to move horizontally.

[0034] Reference Figure 1 - Figure 3 The inner wall of the slide groove 61 is slidably connected to a locking block 62 to prevent the movement of the pry block 56. The front end of the locking block 62 is rotatably connected to a support screw 63 to support the locking block 62. The support screw 63 passes through and is threadedly connected to the front end of the guide frame 57. When the support screw 63 moves back and forth, the locking block 62 will move back and forth synchronously. The front end of the support screw 63 is fixedly connected to a knob 64 for the operator to rotate the support screw 63. The outer wall of the fixing sleeve 1 is provided with fixing holes 7 in multiple sets. By setting fixing holes 7, nails can be hammered in when necessary to further enhance the stability of the connection between the overall device and the bone.

[0035] Example 2:

[0036] Reference Figure 1 , Figure 3 and Figure 4The difference between Embodiment 2 and Embodiment 1 in this utility model is that the knob 64 in Embodiment 2 is designed in a cross shape. This will take up more space during use, but at the same time it will make it easier for the operator to rotate, and can prevent the operator from being unable to rotate the knob 64 due to the slippery outside of their gloves.

[0037] Working principle: During the operation, the fixation sleeve 1 is first placed near the femoral neck where osteotomy is to be performed. Then, depending on the thickness of the femur, the two sets of rotating sleeves 2 are rotated. During the rotation of the rotating sleeve 2, the outer serrated block 51 presses against the limiting block 53, causing the limiting block 53 to retract into the stop block 52 against the elastic force of the limiting spring 54. When the rotating sleeve 2 is adjusted to the appropriate position, the limiting spring 54 pushes the limiting block 53 to re-engage with the serrated block 51, thereby firmly fixing the device on the femoral neck. If further stability is required, nails can be hammered in through the fixation hole 7 on the outer wall of the fixation sleeve 1 for auxiliary fixation.

[0038] Once the entire device is fixed in the osteotomy position, rotate the knob 64. The knob 64 drives the support screw 63 to move into the guide frame 57. The support screw 63 pushes the locking block 62 to slide in the slide groove 61. The locking block 62 presses against the front end of the lever 56, preventing the lever 56 from moving forward. This restricts the movement of the limit block 53, preventing the rotating sleeve 2 from being accidentally unlocked and ensuring the stability of the device during the osteotomy process.

[0039] After fixation, the surgical saw blade performs cutting along the cutting groove 3. During the cutting process, the support frame 4 and the stop block 52 act as a barrier to prevent the saw blade from moving excessively and damaging the surrounding soft tissue. Due to the guidance of the cutting groove 3, the flatness of the osteotomy surface can be guaranteed, reducing the probability of needing multiple adjustments due to unevenness of the surface, and reducing osteotomy time and infection risk.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A femoral neck osteotomy device for hip replacement, comprising a fixation sleeve (1), characterized in that: A support frame (4) is fixedly connected to the outer wall of the fixed sleeve (1) near the front end. A rotating sleeve (2) is hinged to the inner wall of the support frame (4) near the rear end. A limit component (5) is provided on the inner wall of the support frame (4). The limit component (5) includes a stop (52). The stop (52) is fixedly connected to the inner wall of the support frame (4). A serrated block (51) is provided on the outer side of the rotating sleeve (2) near the front end. The rear surface of the stop (52) is through and slidably connected to the limit component. Position block (53), the limiting block (53) and the stop block (52) are elastically connected by limiting spring (54), the fixed sleeve (1) and the rotating sleeve (2) are provided in multiple sets, the multiple sets of fixed sleeve (1) and rotating sleeve (2) are symmetrically arranged with the center line of the support frame (4) as the axis of symmetry, the middle position of the two sets of rotating sleeve (2) is set as a cutting groove (3), the front end of the support frame (4) is fixedly connected to a guide frame (57), and the inner wall of the guide frame (57) is provided with a locking component (6).

2. The femoral neck osteotomy device for hip replacement according to claim 1, characterized in that: The limiting block (53) is configured as a U-shape.

3. The femoral neck osteotomy device for hip replacement according to claim 1, characterized in that: The front end of the limiting block (53) is fixedly connected to a pull rod (55), and the front end of the pull rod (55) is fixedly connected to a toggle block (56).

4. The femoral neck osteotomy device for hip replacement according to claim 3, characterized in that: The lever (56) is slidably connected to the inner wall of the guide frame (57), and the lever (56) is configured as H-shaped.

5. The femoral neck osteotomy device for hip replacement according to claim 4, characterized in that: The locking assembly (6) includes a groove (61) disposed on the inner wall of the guide frame (57), and the toggle block (56) slides on the inner wall of the groove (61).

6. The femoral neck osteotomy device for hip replacement according to claim 5, characterized in that: The inner wall of the groove (61) is slidably connected to a locking block (62).

7. The femoral neck osteotomy device for hip replacement according to claim 6, characterized in that: The front end of the locking block (62) is rotatably connected to a support screw (63), which is threaded through and connected to the front end of the guide frame (57). A knob (64) is fixedly connected to the front end of the support screw (63).

8. The femoral neck osteotomy device for hip replacement according to claim 1, characterized in that: The outer wall of the fixing sleeve (1) is provided with fixing holes (7) in multiple sets.

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