Femoral stem awl protective sleeve applied to hip replacement revision

Abstract

The utility model relates to the technical field of protective sleeves, in particular to a femoral stem awl protective sleeve applied to hip replacement revision. In order to solve the problems that a temporary protective sleeve manufactured by a shear injector has potential safety hazards, is difficult to adapt to various prosthetic handle cones of different models, is poor in applicability and is poor in fixing effect, the following technical scheme is provided: the temporary protective sleeve comprises an outer protective sleeve, an inner protective sleeve is fixedly connected in the outer protective sleeve, the inner protective sleeve is sleeved on the handle cone, and the outer protective sleeve is fixedly connected with the inner protective sleeve. One end of the inner sheath is opened; and the fixing mechanisms are arranged in the inner sheath and used for clamping the handle awl so as to fix the position of the inner sheath. The utility model discloses not only can eliminate the risk of needle stick injury, avoid the hidden danger such as protective sleeve disengagement to improve the operation safety, but also can eliminate the tedious step of temporary manufacture, adapt to different models of prostheses to optimize the process efficiency, can also reuse, reduce the medical cost.

Description

Technical Field

[0001] This utility model relates to the field of protective sleeve technology, and in particular to a femoral stem cone protective sleeve used in hip replacement revision surgery. Background Technology

[0002] In current clinical practice for hip revision surgery, there are problems with the protection methods for the femoral prosthesis stem and cone. Typically, surgeons cut a syringe and needle, using one end as a temporary protective sleeve for the femoral prosthesis stem and cone. Currently, there is no dedicated protective sleeve designed specifically for the femoral stem and cone during hip replacement surgery. This method of temporarily using a syringe to create a protective sleeve has significant drawbacks. Firstly, medical staff are highly susceptible to needlestick injuries during the process, and the cut syringe edges are often irregular and sharp, posing a safety hazard. Secondly, the available syringe models are limited, making it difficult to adapt to various prosthesis stem and cone sizes, resulting in poor applicability. Furthermore, since the temporary protective sleeve lacks a securing mechanism, it can easily detach from the stem and cone during complex surgical procedures, affecting the surgical process and potentially adversely impacting the surgical outcome. Therefore, this invention proposes a femoral stem and cone protective sleeve for hip revision surgery. Utility Model Content

[0003] The purpose of this invention is to address the safety hazards of temporary protective sleeves made from cutting syringes in the prior art, which are difficult to adapt to various types of prostheses, resulting in poor applicability and poor fixation. The invention proposes a femoral stem and cone protective sleeve for hip replacement revision surgery.

[0004] The technical solution of this utility model is as follows: A femoral stem conus protective sleeve for hip replacement revision surgery, comprising an outer sleeve, an inner sleeve fixedly connected to the outer sleeve, the inner sleeve being fitted onto the stem conus, and one end of the inner sleeve being open; multiple sets of fixing mechanisms disposed in the inner sleeve, the fixing mechanisms being used to clamp the stem conus to fix the position of the inner sleeve; and an adjustment component installed on the outer sleeve and the inner sleeve, the adjustment component being used to adjust the clamping diameter of the fixing mechanisms to accommodate different sizes of stem conus.

[0005] Optionally, the fixing mechanism includes multiple sets of clamping blocks disposed inside the inner sheath, multiple sets of connecting blocks fixedly connected to the outer side of the clamping blocks, the connecting blocks penetrating the inner sheath and slidably connected to it, a spring cavity being formed in the connecting block, a pressing plate being slidably connected in the spring cavity, a connecting rod being fixedly connected to the side of the pressing plate away from the clamping blocks, multiple sets of connecting rods being fixedly connected to an adjusting block, and a first spring sleeved and installed on the outer ring of the connecting block being disposed between the adjusting block and the inner sheath.

[0006] Optionally, a limiting frame is slidably connected to the outside of the connecting rod. The limiting frame has a "U" shaped structure and is fixedly connected between the outer sheath and the inner sheath.

[0007] Optionally, a second spring is provided in the spring cavity, and the second spring is located on the side of the extrusion plate away from the connecting rod.

[0008] Optionally, the clamping block is made of rubber, and the clamping block is inclined on the side near the opening of the inner sheath.

[0009] Optionally, the adjusting assembly includes a rotating cylinder sleeved on the outside of the inner sheath, a threaded ring fixedly connected to the outside of the rotating cylinder, a threaded sleeve threadedly connected to the outer ring of the threaded ring, and multiple sets of connecting plates fixedly connected to the outside of the threaded sleeve. The multiple sets of connecting plates correspond to the positions of multiple sets of fixing mechanisms. A pressing block is fixedly connected to the side of the connecting plate near the inner sheath, and the pressing block and the adjusting block have a slidingly fitted inclined surface on the opposite side.

[0010] Optionally, limit strips are provided on both sides of the connecting plate, the connecting plate is slidably connected between the two sets of limit strips, and the limit strips are fixedly connected to the inner wall of the outer sheath.

[0011] Optionally, two sets of limiting rings are fixedly connected to the outside of the rotating cylinder. One set of limiting rings contacts the inner wall of the outer sheath, and the other set of limiting rings is rotatably connected to a sliding seat. The sliding seat is fixedly connected to the outside of the inner sheath. One end of the rotating cylinder protrudes from the surface of the outer sheath and a rotating ring is fixedly connected to its outside.

[0012] Optionally, a sealing ring is provided at the position where the connecting block penetrates the inner sheath, and the sealing ring is installed on the inner sheath.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This utility model, through the setting of the fixing mechanism, when the inner protective sleeve is put on the shank cone, the elastic force of the second spring allows the clamping block to squeeze the shank cone, so that the protective sleeve is firmly fixed on the shank cone. At the same time, due to the rubber material of the clamping block, the surface of the shank cone will not be damaged, thus ensuring the performance of the shank cone.

[0015] Furthermore, by adjusting the component settings, the squeezing block can be moved when the rotating ring is rotated, which in turn moves the adjusting block and adjusts the distance between the clamping blocks. This makes it easier to fit the inner sheath onto the stem cone of different prostheses, thus improving the applicability of the protective sheath.

[0016] In summary, this invention can not only eliminate the risk of needlestick injury and avoid the hidden dangers of protective sheath falling off, thus improving surgical safety, but also eliminate the cumbersome steps of temporary fabrication, adapt to different models of prostheses to optimize process efficiency, and can be reused to reduce medical costs. Attached Figure Description

[0017] Figure 1 A schematic diagram of a femoral stem cone protective sleeve for use in hip replacement revision surgery is provided.

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the inner sheath.

[0021] Figure label:

[0022] 1. Outer sheath; 2. Inner sheath;

[0023] 3. Fixing mechanism; 31. Clamping block; 32. Connecting block; 33. Spring cavity; 34. Pressing plate; 35. Connecting rod; 36. Adjusting block; 37. First spring; 38. Limiting frame; 39. Second spring;

[0024] 4. Adjusting assembly; 41. Rotating cylinder; 42. Threaded ring; 43. Threaded sleeve; 44. Connecting plate; 45. Extrusion block; 46. Limiting strip; 47. Limiting ring; 48. Sliding seat; 49. Rotating ring;

[0025] 5. Sealing ring. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example

[0032] like Figures 1 to 4 As shown, the present invention proposes a femoral stem cone protection sleeve for hip replacement revision surgery, including an outer sheath 1, an inner sheath 2 fixedly connected to the outer sheath 1, the inner sheath 2 being sleeved on the stem cone, and one end of the inner sheath 2 being open to facilitate the inner sheath 2 being sleeved on the stem cone at the open position.

[0033] Furthermore, the aforementioned protective sleeve also includes multiple sets of fixing mechanisms 3 disposed within the inner sleeve 2. These fixing mechanisms 3 are used to clamp the shank cone, thereby fixing the position of the inner sleeve 2. The fixing mechanism 3 includes multiple sets of clamping blocks 31 disposed inside the inner sleeve 2. The clamping blocks 31 are made of rubber, and the side of the clamping block 31 closest to the opening of the inner sleeve 2 is inclined to facilitate the inner sleeve 2 being fitted onto the shank cone, while the rubber material prevents damage to the surface of the shank cone. Two sets of connecting blocks 32 are fixedly connected to the outer side of the clamping blocks 31. The connecting blocks 32 penetrate the inner sleeve 2 and are slidably connected to it, ensuring smooth movement of the clamping blocks 31. A sealing ring 5 is disposed at the position where the connecting block 32 penetrates the inner sleeve 2. The sealing ring 5 is installed on the inner sleeve 2 to prevent liquid media from entering between the outer sleeve 1 and the inner sleeve 2. A spring cavity 33 is provided in the connecting block 32, and a pressing plate 34 is slidably connected in the spring cavity 33. A connecting rod 35 is fixedly connected to the side of the pressing plate 34 away from the clamping block 31. Multiple sets of connecting rods 35 are fixedly connected to an adjusting block 36. When the adjusting block 36 moves, it drives the connecting rods 35 and the pressing plate 34 to move synchronously. A first spring 37 is provided between the adjusting block 36 and the inner sheath 2 and is sleeved on the outer ring of the connecting block 32. The first spring 37 is used to release the elastic force to facilitate the reset of the adjusting block 36. A limit frame 38 is slidably connected to the outside of the connecting rod 35. The limit frame 38 has a "U" shaped structure and is fixedly connected between the outer sheath 1 and the inner sheath 2. The fixed position of the limit frame 38 makes the movement of the connecting rod 35 smooth. A second spring 39 is provided in the spring cavity 33. The second spring 39 is located on the side of the extrusion plate 34 away from the connecting rod 35. The second spring 39 is used to release the elastic force so that the clamping block 31 does not excessively extrude the shank cone while ensuring a large extrusion force to improve the installation firmness.

[0034] Furthermore, the aforementioned protective sleeve includes an adjustment assembly 4 installed on the outer sleeve 1 and the inner sleeve 2. The adjustment assembly 4 is used to adjust the clamping diameter of the fixing mechanism 3 to accommodate different sizes of shank cones. The adjustment assembly 4 includes a rotating cylinder 41 sleeved on the outside of the inner sleeve 2. A threaded ring 42 is fixedly connected to the outside of the rotating cylinder 41. When the rotating cylinder 41 rotates, it drives the threaded ring 42 to rotate synchronously. A threaded sleeve 43 is fitted around the outer ring of the threaded ring 42 and is threadedly connected to it. When the threaded ring 42 rotates, it drives the threaded sleeve 43 to move. Four sets of connecting plates 44 are fixedly connected to the outside of the threaded sleeve 43. When the threaded sleeve 43 moves, it drives the connecting plates 44 to move synchronously. The four sets of connecting plates 44 correspond to the positions of the four fixing mechanisms 3 respectively. A pressing block 45 is fixedly connected to the side of the connecting plate 44 near the inner sleeve 2. The pressing block 45 moves synchronously with the connecting plate 44. The squeezing block 45 and the adjusting block 36 have a slidingly fitted inclined surface on opposite sides. When the squeezing block 45 squeezes the adjusting block 36, it drives the adjusting block 36 to move, thereby adjusting the distance between the clamping blocks 31 to accommodate the stem cone of different prostheses. Limiting strips 46 are provided on both sides of the connecting plate 44. The connecting plate 44 is slidably connected between the two sets of limiting strips 46. The limiting strips 46 are fixedly connected to the inner wall of the outer sheath 1. The fixed position of the limiting strips 46 ensures smooth movement of the connecting plate 44, thus allowing the threaded ring 42 to drive the threaded sleeve 43 to move smoothly when rotating. Two sets of limiting rings 47 are fixedly connected to the outside of the rotating cylinder 41. One set of limiting rings 47 contacts the inner wall of the outer sheath 1, and the other set of limiting rings 47 is rotatably connected to a sliding seat 48. The sliding seat 48 is fixedly connected to the outside of the inner sheath 2. The setting of the limiting rings 47 and the sliding seat 48 ensures smooth rotation of the rotating cylinder 41. One end of the rotating cylinder 41 protrudes from the surface of the outer sheath 1 and a rotating ring 49 is fixedly connected to its outer side. The rotating ring 49 facilitates the rotation of the rotating cylinder 41.

[0035] In this embodiment, before fitting the mounting sleeve onto the smaller shank cone, one hand holds the outer sheath 1, while the other hand rotates the rotating ring 49. The rotating ring 49 drives the rotating cylinder 41 to rotate. During rotation, the rotating cylinder 41 rotates smoothly due to the combined limiting effect of the limiting ring 47, the sliding seat 48, and the rotating ring 49. The rotation of the rotating cylinder 41 drives the threaded ring 42 to rotate synchronously, allowing the threaded sleeve 43 to move smoothly under the limiting effect of multiple sets of connecting plates 44 and multiple sets of limiting strips 46. The threaded sleeve 43 drives the pressing block 45 to move synchronously via the connecting plate 44. As the pressing block 45 moves, it presses the adjusting block 36, allowing the adjusting block 36 to move smoothly under the limiting effect of the limiting frame 38. As the adjusting block 36 moves, it drives the pressing plate 34 to press the second spring 39 via the connecting rod 35. The release force of the second spring 39 causes the connecting block 32 and the spring cavity 33 to move towards the center position, thereby reducing the distance between the clamping blocks 31 and facilitating the clamping of the smaller shank cone. When protecting the larger shank, the second spring 39 is rotated in the reverse direction, causing the pressing block 45 to move upward. At the same time, the first spring 37 releases its elastic force, causing the adjusting block 36 to return to its original position. This increases the distance between the clamping blocks 31, making it easier to put the protective sleeve on the larger shank cone. The clamping blocks 31 allow the inner sheath 2 to be fitted onto the shank cone, and the elastic force of the second spring 39 ensures a secure fixation, preventing it from falling off.

[0036] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A femoral stem conus protective sleeve for use in hip replacement revision surgery, characterized in that, Include: The outer sheath (1), the inner sheath (2) is fixedly connected in the outer sheath (1), the inner sheath (2) is sleeved on the handle cone, and one end of the inner sheath (2) is provided with an opening; A plurality of fixing mechanisms (3) are arranged in the inner sheath (2), and the fixing mechanism (3) is used for clamping the handle cone so as to fix the position of the inner sheath (2); The adjusting assembly (4) is installed on the outer sheath (1) and the inner sheath (2), and the adjusting assembly (4) is used for adjusting the clamping diameter of the fixing mechanism (3) so as to be suitable for different sizes of handle cone.

2. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 1, wherein, The fixing mechanism (3) includes a plurality of clamping blocks (31) arranged on the inner side of the inner sheath (2), a plurality of connecting blocks (32) are fixedly connected to the outer side of the clamping block (31), the connecting block (32) penetrates the inner sheath (2) and is slidably connected with the inner sheath (2), a spring cavity (33) is formed in the connecting block (32), a pressing plate (34) is slidably connected in the spring cavity (33), the connecting rod (35) is fixedly connected to the side of the pressing plate (34) away from the clamping block (31), a plurality of connecting rods (35) are fixedly connected with an adjusting block (36), and a first spring (37) is arranged between the adjusting block (36) and the inner sheath (2) and is sleeved and installed on the outer circle of the connecting block (32).

3. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 2, wherein, The connecting rod (35) is slidably connected with a limiting frame (38) on the outer side, the limiting frame (38) is in a "N" shape structure, and the limiting frame (38) is fixedly connected between the outer sheath (1) and the inner sheath (2).

4. The femoral stem taper protector for hip revision surgery of claim 3, wherein, The spring cavity (33) is provided with a second spring (39), and the second spring (39) is arranged on the side of the pressing plate (34) away from the connecting rod (35).

5. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 4, wherein, The clamping block (31) is made of rubber material, and the clamping block (31) is inclined to the side close to the opening of the inner sheath (2).

6. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 5, wherein, The adjusting assembly (4) includes a rotating cylinder (41) sleeved on the outer side of the inner sheath (2), a threaded ring (42) is fixedly connected to the outer side of the rotating cylinder (41), a threaded sleeve (43) is sleeved and installed on the outer circle of the threaded ring (42) and is screwed with the threaded ring (42), a plurality of connecting plates (44) are fixedly connected to the outer side of the threaded sleeve (43), a plurality of connecting plates (44) are respectively corresponding to a plurality of fixing mechanisms (3), an extrusion block (45) is fixedly connected to the side of the connecting plate (44) close to the inner sheath (2), and an inclined surface in sliding cooperation is formed in the side of the extrusion block (45) opposite to the adjusting block (36).

7. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 6, characterised in that, The connecting plate (44) is provided with a limiting strip (46) on both sides, the connecting plate (44) is slidably connected between the two limiting strips (46), and the limiting strip (46) is fixedly connected to the inner wall of the outer sheath (1).

8. A femoral stem taper sleeve for use in revision hip arthroplasty according to claim 7, characterized in that, The rotating cylinder (41) is fixedly connected with two groups of limiting rings (47) outside, one group of the limiting rings (47) is in contact with the inner wall of the outer sheath (1), the other group of the limiting rings (47) is rotatably connected with a sliding seat (48) outside, the sliding seat (48) is fixedly connected to the outer side of the inner sheath (2), and one end of the rotating cylinder (41) protrudes from the surface of the outer sheath (1) and is fixedly connected with a rotating ring (49) outside.

9. The stem taper protector for hip revision surgery of claim 2, wherein, The connecting block (32) is provided with a sealing ring (5) at a position penetrating the inner sheath (2), and the sealing ring (5) is installed on the inner sheath (2).

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