Positioning system for knee joint distal femur osteotomy device

Abstract

The invention relates to the technical field of distal femur osteotomy devices, and discloses a positioning system for a distal femur osteotomy device of a knee joint, which comprises an osteotomy module and a positioning module arranged at the front end of the osteotomy module, and further comprises two positioning holes respectively arranged at two end parts of the positioning module in a penetrating manner; the left sleeve and the right sleeve are movably arranged in the two positioning holes respectively and used for allowing the fixing pin to penetrate through; and the left sleeve and the right sleeve can freely move and be freely positioned in the positioning holes. According to the positioning system for the knee joint thighbone far-end osteotomy device, the left sleeve and the right sleeve which can move freely are arranged on the positioning module, so that the positions of the osteotomy module and the positioning module can be flexibly adjusted according to requirements in an operation, a fixed preset hole site does not need to be relied on, and the whole osteotomy device does not need to be disassembled; the adaptability and the operation accuracy of the osteotomy device are improved, and the operation efficiency is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of distal femoral osteotomies, in particular to a positioning system for distal femoral osteotomies of knee joints. Background Art

[0002] In knee replacement surgery, it is usually necessary to perform osteotomy on the distal femur of the knee joint to facilitate the implantation of the prosthesis. At present, the commonly used distal femoral osteotomy usually uses a preset fixing hole to determine the installation position of the fixing pin (the fixing holes are generally set three on each side, distributed in a triangular shape). Although this structure is relatively simple, in actual application, we found that it also has certain defects: First, since the fixing holes are preset during design, if the osteotomy thickness is found to be inappropriate after osteotomy, the osteotomy must be completely removed and reinstalled to adjust the position of the osteotomy, which makes the adjustment operation more complicated and easy to be misaligned during alignment, resulting in loosening of the fixing pin. Secondly, the limited number of fixation holes will result in a smaller adjustment space for the osteotomy. When the surgeon encounters osteoporosis, anatomical variation, or uneven bone surface, the small adjustment space may not allow him to select the best fixation point, which will lead to unsatisfactory fixation effects and affect the accuracy of osteotomy. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies of the prior art, the present invention provides a positioning system for a distal femoral osteotome of a knee joint, which has the advantage of being able to adjust the position of the osteotome conveniently, quickly and freely.

[0004] (II) Technical solution In order to achieve the above-mentioned purpose of being able to adjust the position of the osteotome conveniently, quickly and freely, the present invention provides the following technical solution: a positioning system for a distal femoral osteotome of a knee joint, comprising an osteotomy module and a positioning module arranged at the front end of the osteotomy module, and also comprising: Two positioning holes are respectively opened through the two ends of the positioning module; The left sleeve and the right sleeve are movably arranged in the two positioning holes respectively, and are used for the fixing pin to pass through; The left sleeve and the right sleeve can move and position freely in the positioning hole.

[0005] As a preferred technical solution of the present invention, the left sleeve and the right sleeve are connected via a connecting plate, the connecting plate is movably arranged in the connecting groove, and the connecting groove is through-opened between the two positioning holes; The connecting plate can move and position freely in the connecting groove.

[0006] As a preferred technical solution of the present invention, a plurality of transverse grooves are evenly formed on the top of one end of the connecting plate, a clamping strip is movably inserted in the transverse groove, the clamping strip is fixedly installed at the bottom of the left pressing block, and the left pressing block is movably arranged in the left cavity opened inside the positioning module; A plurality of longitudinal grooves are evenly formed on the top of the other end of the connecting plate, and insert strips are movably inserted in the longitudinal grooves. The insert strips are fixedly installed at the bottom of the right pressing block, and the right pressing block is movably arranged up and down in the right cavity opened inside the positioning module.

[0007] As a preferred technical solution of the present invention, the tops of the left and right pressure blocks are both provided with screw grooves, threaded rods are screwed into the screw grooves, and the tops of the threaded rods extend to the outside of the positioning module and are fixedly connected with knobs.

[0008] As a preferred technical solution of the present invention, a rod groove for allowing a threaded rod to pass through is provided on the top of the positioning module, and the threaded rod is connected to the inner wall of the rod groove via a fixed bearing.

[0009] As a preferred technical solution of the present invention, the bottom ends of the clamping strip and the inserting strip are both movably and telescopically provided with floating blocks.

[0010] As a preferred technical solution of the present invention, the bottom ends of the clamping strip and the inserting strip are both provided with bottom grooves, and the floating block is movably arranged in the bottom grooves and supported downward by a supporting spring.

[0011] As a preferred technical solution of the present invention, a ball sleeve is fixedly installed at the end of the connecting plate, and spherical protrusions are formed on the outer walls of the left sleeve and the right sleeve. The spherical protrusions are rotatably installed in the ball sleeve and are positioned by friction.

[0012] As a preferred technical solution of the present invention, an airbag cover that can be inflated is laid on the inner wall of the ball cover.

[0013] As a preferred technical solution of the present invention, the airbag cover is connected to the tail airbag through a connecting pipe, and the tail airbag is laid in the transverse groove and the longitudinal groove.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides a positioning system for a distal femoral osteotome of a knee joint, which has the following beneficial effects: 1. The positioning system for the distal femoral osteotomy of the knee joint, by arranging freely movable left and right sleeves on the positioning module, allows the positions of the osteotomy module and the positioning module to be flexibly adjusted according to intraoperative requirements, without relying on fixed preset holes or disassembling the entire osteotomy, thereby improving the adaptability of the osteotomy and surgical accuracy, and also improving surgical efficiency.

[0015] 2. The positioning system for the distal femoral osteotomy of the knee joint has a left sleeve and a right sleeve connected by a connecting plate, so that the left sleeve and the right sleeve always maintain a symmetrical distribution, ensuring that the fixing pin is stable and unchanged, while allowing the osteotomy to be freely adjusted within a certain range to meet different intraoperative needs.

[0016] 3. The positioning system for the distal femoral osteotomy of the knee joint can stably fix the positions of the left sleeve and the right sleeve through the downward positioning of the left pressure block and the right pressure block, thereby ensuring that the entire osteotomy module and the positioning module can be stably fixed, facilitating the osteotomy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the positioning module part of the present invention; Figure 3 A cross-sectional view of a positioning module portion of the present invention; Figure 4 A top view of a sectional view of a positioning module of the present invention; Figure 5 It is an enlarged schematic diagram of the right pressing block part of the present invention; Figure 6 It is an enlarged schematic diagram of the ball sleeve part of the present invention; Figure 7 It is a cross-sectional view of the ball sleeve part of the present invention.

[0018] In the figure: 1. osteotomy module; 2. positioning module; 3. positioning hole; 4. left sleeve; 5. right sleeve; 6. connecting plate; 7. connecting groove; 8. transverse groove; 9. left pressure block; 10. clamping strip; 11. longitudinal groove; 12. right pressure block; 13. insert strip; 14. threaded rod; 15. knob; 16. fixed bearing; 17. bottom groove; 18. floating block; 19. support spring; 20. spherical protrusion; 21. ball sleeve; 22. airbag sleeve; 23. connecting pipe; 24. tail airbag. DETAILED DESCRIPTION

[0019] 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, not all of the embodiments. 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.

[0020] Embodiment 1: See also Figure 1-Figure 4 A positioning system for a distal femoral osteotome of a knee joint comprises an osteotomy module 1 and a positioning module 2 arranged at the front end of the osteotomy module 1. Figure 1 As shown, two positioning holes 3 are respectively formed at the two ends of the positioning module 2, and the left sleeve 4 and the right sleeve 5 are respectively movably arranged in the two positioning holes 3 for the fixing pin to pass through. In the present invention, the left sleeve 4 and the right sleeve 5 can move and position freely in the positioning holes 3; The left sleeve 4 and the right sleeve 5 replace the original preset holes, so that the positions of the osteotomy module 1 and the positioning module 2 can be flexibly adjusted according to intraoperative requirements without relying on fixed preset holes or disassembling the entire osteotome, thereby improving the adaptability of the osteotome and surgical accuracy, and improving surgical efficiency.

[0021] like Figure 2 As shown, the left sleeve 4 and the right sleeve 5 are connected by a connecting plate 6, and the connecting plate 6 is movably arranged in the connecting groove 7. The connecting groove 7 is through and opened between the two positioning holes 3. The connecting plate 6 can move and position freely in the connecting groove 7. The left sleeve 4 and the right sleeve 5 are connected by the connecting plate 6, so that the left sleeve 4 and the right sleeve 5 always maintain a symmetrical distribution, ensuring that the fixing pin is stable and unchanged, and allowing the osteotomy to be freely adjusted within a certain range to meet different intraoperative needs; Specifically, during use, the fixing pin passes through the left sleeve 4 and the right sleeve 5 and is fixed on the femur. When the position of the osteotome needs to be adjusted, the connecting plate 6 can be unlocked. After unlocking the connecting plate 6, the entire positioning module 2 can be fine-tuned relative to the left sleeve 4 and the right sleeve 5. During this process, the positions of the left sleeve 4, the right sleeve 5 and the fixing pin remain unchanged. After adjusting the positioning module 2 to a suitable position, the connecting plate 6 can be re-locked. In this adjustment method, there is no need to remove the positioning module 2, which can reduce the additional surgical time caused by repeated disassembly and assembly of the osteotome during surgery, improve the fluency of the surgery, and at the same time, the adjustable range is larger than the traditional preset hole position method. In this embodiment, a plurality of transverse grooves 8 are evenly formed on the top of one end of the connecting plate 6, and a card strip 10 is movably inserted in the transverse groove 8. The card strip 10 is fixedly installed at the bottom of the left pressure block 9, and the left pressure block 9 is movably arranged in the left cavity opened inside the positioning module 2. A plurality of longitudinal grooves 11 are evenly formed on the top of the other end of the connecting plate 6, and an insertion strip 13 is movably inserted in the longitudinal groove 11. The insertion strip 13 is fixedly installed at the bottom of the right pressure block 12, and the right pressure block 12 is movably arranged in the right cavity opened inside the positioning module 2; like Figure 2 As shown, when the left pressing block 9 and the right pressing block 12 are both moved upward, the clamping strip 10 is not clamped into the transverse groove 8, and the inserting strip 13 is not clamped into the longitudinal groove 11. At this time, the connecting plate 6 can move freely in the connecting groove 7, thereby adjusting the positions of the left sleeve 4 and the right sleeve 5 (relatively speaking, in fact, the positions of the left sleeve 4 and the right sleeve 5 remain unchanged, and the position of the osteotome is adjusted); On the contrary, when the left pressure block 9 and the right pressure block 12 are both moved downward, the clamping strip 10 is clamped into the transverse groove 8, and the inserting strip 13 is clamped into the longitudinal groove 11. At this time, the connecting plate 6 cannot move freely in the connecting groove 7, thereby locking the positions of the left sleeve 4 and the right sleeve 5. by Figure 4 From the perspective of viewing angle, when the left pressure block 9 moves downward and the right pressure block 12 moves upward, only the card strip 10 is inserted into the horizontal groove 8. At this time, although the connecting plate 6 cannot move up and down, it can move left and right to adjust the position; when the left pressure block 9 moves upward and the right pressure block 12 moves downward, only the insertion strip 13 is inserted into the vertical groove 11. At this time, although the connecting plate 6 cannot move left and right, it can move up and down to adjust the position; Thus, in this embodiment, by adjusting the positions of the left pressure block 9 and the right pressure block 12, it is possible to control whether the positions of the connecting plate 6, the left sleeve 4 and the right sleeve 5 are locked or not; during normal osteotomy, their positions are locked, and when the position of the osteotome needs to be adjusted to change the osteotomy thickness, they can be unlocked.

[0022] In the present invention, a mechanism for controlling the left pressing block 9 and the right pressing block 12 to move up and down is also specifically provided. Figure 2 As shown, the tops of the left pressure block 9 and the right pressure block 12 are both provided with screw grooves, in which threaded rods 14 are screwed, and the tops of the threaded rods 14 extend to the outside of the positioning module 2 and are fixedly connected with knobs 15. The top of the positioning module 2 is provided with a rod groove for allowing the threaded rod 14 to pass through, and the threaded rod 14 is connected to the inner wall of the rod groove by a fixed bearing 16. Therefore, by turning the knob 15 to rotate the threaded rod 14, the up and down movement of the left pressure block 9 or the right pressure block 12 can be controlled.

[0023] Embodiment 2: See also Figure 4 On the basis of the first embodiment, in this embodiment, the bottom ends of the card strip 10 and the insertion strip 13 are both movably and telescopically provided with a floating block 18. Specifically, the bottom ends of the card strip 10 and the insertion strip 13 are both provided with a bottom groove 17, and the floating block 18 is movably arranged in the bottom groove 17 and supported by the support spring 19. Figure 4 As shown, the bottom end of the floating block 18 is an arc-shaped surface; In this embodiment, when the left pressure block 9 or the right pressure block 12 is in the highest position, the bottom arc surface of the floating block 18 is still located in the horizontal groove 8 or the vertical groove 11. In this way, when the connecting plate 6 moves, each time a groove is offset, the floating block 18 will be pushed up once and then bounced down, making a "click" sound. This not only makes it easier for the surgeon to judge the displacement distance of the osteotome, but also can perform basic positioning of the connecting plate 6 to prevent the osteotome from moving arbitrarily after the connecting plate 6 is unlocked.

[0024] Embodiment three: See also Figure 6 and Figure 7On the basis of the first embodiment, in this embodiment, a ball sleeve 21 is fixedly installed at the end of the connecting plate 6, and a spherical protrusion 20 is formed on the outer wall of the left sleeve 4 and the right sleeve 5. The spherical protrusion 20 is rotatably installed in the ball sleeve 21 and is positioned by friction. In this way, the angles of the left sleeve 4 and the right sleeve 5 can be freely adjusted within a certain range, so as to facilitate the fixing of the fixing pin at a vertical angle in the case of osteoporosis, anatomical variation or uneven bone surface; In order to further improve the fixing effect of the spherical protrusion 20, in the present invention, an inflatable airbag cover 22 is also laid on the inner wall of the ball cover 21. Specifically, the airbag cover 22 is connected to the tail airbag 24 through a connecting pipe 23, and the tail airbag 24 is laid in the transverse groove 8 and the longitudinal groove 11; In this way, when the clamping strip 10 is inserted into the transverse groove 8 and the inserting strip 13 is inserted into the longitudinal groove 11, the tail airbag 24 will also be squeezed, thereby causing the airbag sleeve 22 to bulge. Through the bulging of the airbag sleeve 22, the spherical protrusion 20 can be further positioned to avoid changes in the positions of the left sleeve 4 and the right sleeve 5. At the same time, it can also provide a certain buffering effect and reduce the influence of intraoperative vibration on the fixation accuracy.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning system for a distal femoral osteotome of a knee joint, comprising an osteotomy module (1) and a positioning module (2) arranged at the front end of the osteotomy module (1), characterized in that: Also includes: Two positioning holes (3) are respectively formed through the two ends of the positioning module (2); The left sleeve (4) and the right sleeve (5) are movably arranged in the two positioning holes (3) respectively, and are used for allowing the fixing pin to pass through; The left sleeve (4) and the right sleeve (5) are able to move freely and be freely positioned in the positioning hole (3).

2. The positioning system for the distal femoral osteotome of the knee joint according to claim 1, characterized in that: The left sleeve (4) and the right sleeve (5) are connected via a connecting plate (6), the connecting plate (6) is movably arranged in a connecting groove (7), and the connecting groove (7) is through-opened between the two positioning holes (3); The connecting plate (6) can move and position freely in the connecting groove (7).

3. The positioning system for the distal femoral osteotome of the knee joint according to claim 2, characterized in that: A plurality of transverse grooves (8) are evenly formed on the top of one end of the connecting plate (6), a clamping strip (10) is movably inserted into the transverse groove (8), the clamping strip (10) is fixedly mounted on the bottom of the left pressure block (9), and the left pressure block (9) is movably arranged up and down in a left cavity formed inside the positioning module (2); A plurality of longitudinal grooves (11) are evenly formed at the top of the other end of the connecting plate (6), and an inserting strip (13) is movably inserted into the longitudinal groove (11). The inserting strip (13) is fixedly mounted on the bottom of the right pressing block (12), and the right pressing block (12) is movably arranged up and down in a right cavity formed inside the positioning module (2).

4. The positioning system for the distal femoral osteotome of the knee joint according to claim 3, characterized in that: The tops of the left pressing block (9) and the right pressing block (12) are both provided with screw grooves, in which threaded rods (14) are screwed, and the tops of the threaded rods (14) extend to the outside of the positioning module (2) and are fixedly connected to a knob (15).

5. The positioning system for the distal femoral osteotome of the knee joint according to claim 4, characterized in that: The top of the positioning module (2) is provided with a rod groove for allowing a threaded rod (14) to pass through, and the threaded rod (14) is connected to the inner wall of the rod groove via a fixed bearing (16).

6. The positioning system for the distal femoral osteotome of the knee joint according to claim 3, characterized in that: The bottom ends of the clamping strip (10) and the inserting strip (13) are both movably and telescopically provided with floating blocks (18).

7. The positioning system for the distal femoral osteotome of the knee joint according to claim 6, characterized in that: The bottom ends of the clamping strip (10) and the inserting strip (13) are both provided with a bottom groove (17), and the floating block (18) is movably arranged in the bottom groove (17) and supported downward by a support spring (19).

8. The positioning system for the distal femoral osteotome of the knee joint according to claim 3, characterized in that: A ball sleeve (21) is fixedly mounted on the end of the connecting plate (6), and a spherical protrusion (20) is formed on the outer wall of the left sleeve (4) and the right sleeve (5). The spherical protrusion (20) is rotatably mounted in the ball sleeve (21) and is positioned by friction.

9. The positioning system for the distal femoral osteotome of the knee joint according to claim 8, characterized in that: An inflatable airbag cover (22) is provided on the inner wall of the ball cover (21).

10. The positioning system for the distal femoral osteotome of the knee joint according to claim 9, characterized in that: The airbag cover (22) is connected to the tail airbag (24) via a connecting pipe (23), and the tail airbag (24) is laid in the transverse groove (8) and the longitudinal groove (11).

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