Visual femoral marrow cavity measuring tool

Abstract

The invention provides a visual femoral medullary cavity measuring tool which comprises a main body, a probe claw capable of extending outwards, a connecting hole arranged on the side wall of the main body, an inserting feedback system, an avoiding hole arranged on the side wall of the main body, an inserting adjusting piece arranged on the side wall of the main body, uniformly distributed adjusting holes arranged on the top of the main body, a screw-in adjusting nut arranged on the top of the main body, and a locking hole arranged in the center of the top of the main body, a locking nut is inserted; the locking system comprises a locking nut and a locking head, the locking nut penetrates through the main body, and the bottom of the locking nut is connected with the locking head; the adjusting system comprises an adjusting nut and an adjusting sheet; the feedback system comprises a visible part outside the main body, a hydraulic part inside the main body and a connecting part for connecting the visible part and the hydraulic part. According to the technical scheme, in the total hip replacement surgery, the adjusting nut is rotated, the adjusting piece is moved to adjust the opening angle of the probing claw, the thickness of the inner wall of the probing claw is judged through the visual part, reliable data support is provided for a doctor for quantitative and refined filing, the surgical risk is reduced, and the surgical success rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a visualized femoral medullary cavity measuring tool. Background Art

[0002] Total hip replacement is currently one of the most commonly used surgeries in joint orthopedics for the treatment of femoral head necrosis and severe hip osteoarthritis. Its excellent therapeutic effect in relieving patients' pain and restoring postoperative joint function has been recognized worldwide.

[0003] During total hip replacement surgery, the intramedullary file relies on brute force hammering to enter the intramedullary cavity, and multiple reciprocating operations are performed to complete the grinding and filing of the femoral intramedullary cavity. The entire process relies entirely on the doctor's experience and hand feel, and it is difficult to avoid proximal femoral cracks or damage to the inner wall of the femur. Summary of the invention

[0004] In response to the above problems, the present invention proposes a visualized femoral medullary cavity measurement tool, which measures the inner wall thickness of the femoral medullary cavity before the medullary cavity file enters the femoral medullary cavity for grinding and filing, providing doctors with reliable data support for quantitative and refined grinding and filing, thereby reducing surgical risks and improving surgical success rates.

[0005] The present invention provides a visualized femoral medullary cavity measuring tool, comprising: a main body, having a probe claw that can be extended outward, a first arc-shaped friction part is provided at the bottom of the probe claw, a connecting hole is provided on the side wall of the main body, a feedback system is inserted, an avoidance hole is also provided on the side wall of the main body, an adjusting plate is inserted, evenly distributed adjusting holes are provided on the top of the main body, a first internal thread is provided on the inner wall of the adjusting hole, an adjusting nut is screwed in, and a locking hole is also provided at the center position of the top of the main body, a locking nut is inserted; a locking system comprises a locking nut and a locking head, the locking nut passes through the main body, and the bottom is connected to the locking head; an adjusting system comprises an adjusting nut and an adjusting plate, a bearing hole is provided at the bottom of the adjusting nut, a rotating shaft is provided on the top of the adjusting plate, and the rotating shaft is inserted in the bearing hole; a feedback system comprises a visible part on the outside of the main body, a hydraulic part on the inside of the main body, and a connecting part connecting the visible part and the hydraulic part, the connecting part is inserted in the connecting hole and passes through the main body.

[0006] Furthermore, the adjusting nut is provided with a first external thread and a first internal hexagonal hole, the first external thread matches with the first internal thread of the adjusting hole, and adjusting the first internal hexagonal hole drives the adjusting plate to move along the axis direction of the main body.

[0007] Furthermore, the adjustment sheet spans the inner side and the outer side of the main body through the avoidance hole, and an avoidance portion is provided at the spanning position, and a connecting portion is inserted.

[0008] Furthermore, a second external thread is provided at the bottom of the locking nut, a second internal hexagonal hole is provided at the top, and a second internal thread is provided at the locking head, and the second external thread matches the second internal thread.

[0009] Furthermore, ribs are provided on the outer surface of the main body in a T-shape, and the adjusting pieces are inserted between adjacent ribs and move along the axis direction of the main body.

[0010] Further, the locking hole of the main body extends downward to form an inner liner in the main body, and the hydraulic part is evenly distributed between the main body and the inner liner.

[0011] Furthermore, the locking head is provided with guide pieces, and the guide pieces are evenly distributed between adjacent probing claws of the main body.

[0012] Furthermore, the locking head is provided with a second friction portion, and both the first friction portion and the second friction portion are arc-shaped, and the center of the arc is the connection point between the probe claw and the main body.

[0013] Furthermore, the feedback system is hollow and filled with colored liquid, and the outer wall of the visible part is transparent.

[0014] By applying the technical solution of the present invention, the surgeon goes deep into the femoral medullary cavity, rotates the locking nut to loosen the locking head, the hydraulic part opens the probe claw, and rotates the adjusting nut to move the adjusting piece to adjust the opening angle of the probe claw. The thickness of the inner wall can be judged through the visual part, providing the doctor with reliable data support for quantitative and refined grinding and filing, thereby reducing surgical risks and improving the success rate of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 An exploded schematic diagram of a visualized femoral medullary cavity measurement tool provided according to an embodiment of the present invention is shown; Figure 2 A cross-sectional view of a visualized femoral medullary cavity measurement tool provided according to an embodiment of the present invention is shown; Figure 3 Shows Figure 2 A partial enlarged view of the middle A; Figure 4 Shows Figure 1 A schematic diagram of the structure of the subject in FIG. Figure 5 Shows Figure 1 A cross-sectional view of the main body in FIG. Figure 6 Shows Figure 1 A schematic diagram of the structure of the locking nut in FIG. Figure 7 Shows Figure 1 A schematic diagram of the structure of the locking head; Figure 8 Shows Figure 1 A schematic diagram of the structure of the regulating piece in FIG. Fig. 9 Shows Figure 1 Schematic diagram of the feedback system in .

[0016] The above drawings include the following reference numerals: 10. Main body; 11. Probe claw; 111. First friction part; 12. Connecting hole; 13. Avoidance hole; 14. Adjustment hole; 141. First internal thread; 15. Locking hole; 16. Rib plate; 17. Lining; 20. Locking system; 21. Locking nut; 211. Second external thread; 212. Second internal hexagonal hole; 22. Locking head; 221. Guide plate; 222. Second internal thread; 223. Second friction part; 30. Adjustment system; 31. Adjustment nut; 311. First external thread; 312. First internal hexagonal hole; 313. Bearing hole; 32. Adjustment sheet; 321. Rotating shaft; 322. Avoidance part; 40. Feedback system; 41. Visual part; 42. Connecting part; 43. Hydraulic part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 9As shown, the present invention provides a visualized femoral medullary cavity measurement tool, comprising: a main body 10, with a probe claw 11 that can be extended outward, a first arc-shaped friction portion 111 is provided at the bottom of the probe claw 11, a connecting hole 12 is provided on the side wall of the main body 10, a feedback system 40 is inserted, an avoidance hole 13 is also provided on the side wall of the main body 10, an adjustment sheet 32 ​​is inserted, a uniformly distributed adjustment hole 14 is provided on the top of the main body 10, a first internal thread 141 is provided on the inner wall of the adjustment hole 14, an adjustment nut 31 is screwed in, a locking hole 15 is also provided at the center of the top of the main body 10, a locking nut 21 is inserted; a locking system 20, including a locking nut 21 and a locking head 22, the locking nut 21 passes through the main body 10, and the bottom is connected to the locking head 22; the adjustment system 30, including an adjusting nut 31 and an adjusting plate 32, the adjusting nut 31 is provided with a bearing hole 313 at the bottom, and the adjusting plate 32 is provided with a rotating shaft 321 at the top, and the rotating shaft 321 is inserted into the bearing hole 313; the feedback system 40, including a visible part 41 on the outside of the main body 10 and a hydraulic part 43 on the inside of the main body 10 and a connecting part 42 connecting the visible part 41 and the hydraulic part 43, the connecting part 42 is inserted into the connecting hole 12 and passes through the main body 10.

[0019] like Figure 2 As shown, the adjusting nut 31 is provided with a first external thread 311 and a first internal hexagonal hole 312 . The first external thread 311 matches with the first internal thread 141 of the adjusting hole 14 . Adjusting the first internal hexagonal hole 312 drives the adjusting plate 32 to move along the axial direction of the main body 10 .

[0020] like Figure 2 and Figure 8 As shown, the adjusting piece 32 spans the inner side and the outer side of the main body 10 through the avoiding hole 13 and is provided with an avoiding portion 322 at the spanning position, and the connecting portion 42 is inserted.

[0021] like Figure 6 As shown, the locking nut 21 has a second external thread 211 at the bottom, a second internal hexagonal hole 212 at the top, and the locking head 22 has a second internal thread 222 , and the second external thread 211 matches the second internal thread 222 .

[0022] like Figure 4 As shown, the outer surface of the main body 10 is further provided with ribs 16 in a T-shape, and the adjusting piece 32 is inserted between adjacent ribs 16 and moves along the axis direction of the main body 10 .

[0023] like Figure 5 As shown, the locking hole 15 of the main body 10 extends downward to form an inner liner 17 in the main body 10 , and the hydraulic part 43 is evenly distributed between the main body 10 and the inner liner 17 , and the inner liner 17 provides support for the hydraulic part 43 .

[0024] like Figure 7 As shown, the locking head 22 is provided with guide pieces 221 , and the guide pieces 221 are evenly distributed between adjacent detection claws 11 of the main body 10 .

[0025] like Figure 3 and Figure 7 As shown, the locking head 22 is provided with a second friction portion 223 , and both the first friction portion 111 and the second friction portion 223 are arc-shaped, with the center of the arc being the connection between the claw 11 and the body 10 .

[0026] like Figure 2 and Fig. 9 As shown, the feedback system 40 is hollow and filled with colored liquid, and the outer wall of the visible part 41 is transparent.

[0027] During actual use, each feedback system 40 is filled with liquid of equal pressure.

[0028] By applying the technical solution of the present invention, the surgeon goes deep into the femoral medullary cavity, rotates the locking nut 21 to loosen the locking head 22, and uses the hydraulic part 43 to open the probe claw 11. The adjusting nut 31 is rotated to move the adjusting piece 32 to adjust the opening angle of the probe claw 11. The thickness of the inner wall is determined by the visual part 41, providing doctors with reliable data support for quantitative and refined grinding and filing, thereby reducing surgical risks and improving the success rate of surgery.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A visual femoral medullary cavity measurement tool, characterized in that: include: The main body (10) has a claw (11) that can be extended outwards, the bottom of the claw (11) is provided with an arc-shaped first friction portion (111), the side wall of the main body (10) is provided with a connecting hole (12), a feedback system (40) is inserted, the side wall of the main body (10) is also provided with an avoidance hole (13), an adjustment plate (32) is inserted, the top of the main body (10) is provided with evenly distributed adjustment holes (14), the inner wall of the adjustment hole (14) is provided with a first internal thread (141), the adjustment nut (31) is screwed in, and a locking hole (15) is also provided at the center of the top of the main body (10), a locking nut (21) is inserted; A locking system (20) comprising a locking nut (21) and a locking head (22), wherein the locking nut (21) passes through the main body (10) and is connected to the locking head (22) at the bottom; The adjustment system (30) comprises an adjustment nut (31) and an adjustment plate (32), wherein a bearing hole (313) is provided at the bottom of the adjustment nut (31), and a rotating shaft (321) is provided at the top of the adjustment plate (32), and the rotating shaft (321) is inserted into the bearing hole (313); The feedback system (40) comprises a visible portion (41) outside the main body (10), a hydraulic portion (43) inside the main body (10), and a connecting portion (42) connecting the visible portion (41) and the hydraulic portion (43); the connecting portion (42) is inserted into the connecting hole (12) and penetrates the main body (10).

2. A visual femoral medullary cavity measurement tool according to claim 1, characterized in that: The adjusting nut (31) is provided with a first external thread (311) and a first internal hexagonal hole (312); the first external thread (311) cooperates with the first internal thread (141) of the adjusting hole (14); adjusting the first internal hexagonal hole (312) drives the adjusting plate (32) to move along the axial direction of the main body (10).

3. A visual femoral medullary cavity measurement tool according to claim 1, characterized in that: The adjustment piece (32) spans the inner side and the outer side of the main body (10) through the avoidance hole (13), and is provided with an avoidance portion (322) at the spanning position, and a connecting portion (42) is inserted therein.

4. The visual femoral medullary cavity measurement tool according to claim 1, characterized in that: The locking nut (21) is provided with a second external thread (211) at the bottom and a second internal hexagonal hole (212) at the top. The locking head (22) is provided with a second internal thread (222). The second external thread (211) matches the second internal thread (222).

5. The visual femoral medullary cavity measurement tool according to claim 1, characterized in that: The outer surface of the main body (10) is further provided with ribs (16) in a T-shape, and the adjustment plates (32) are inserted between adjacent ribs (16) and move along the axis direction of the main body (10).

6. The visualized femoral medullary cavity measurement tool according to claim 1, characterized in that: The locking hole (15) of the main body (10) extends downward to form an inner liner (17) in the main body (10), and the hydraulic part (43) is evenly distributed between the main body (10) and the inner liner (17).

7. The visualized femoral medullary cavity measurement tool according to claim 1, characterized in that: The locking head (22) is provided with a guide piece (221), and the guide piece (221) is evenly distributed between adjacent detection claws (11) of the main body (10).

8. The visualized femoral medullary cavity measurement tool according to claim 1, characterized in that: The locking head (22) is provided with a second friction portion (223), and the first friction portion (111) and the second friction portion (223) are both arc-shaped, with the center of the arc being the connection point between the probe claw (11) and the main body (10).

9. The visualized femoral medullary cavity measurement tool according to claim 1, characterized in that: The feedback system (40) is hollow and filled with colored liquid, and the outer wall of the visible part (41) is transparent.

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