Tibia positioning and adjusting device

Abstract

The embodiment of the utility model provides a tibia positioning and adjusting device, which comprises a joint rod assembly, a connecting rod assembly and a connecting rod assembly, the navigation module comprises a plurality of navigation modules used for assisting in measuring the force line of the knee joint, and the plurality of navigation modules are detachably arranged on different joint rods in the joint rod assembly; the measuring modules are arranged at the two ends of the joint rod assembly and used for assisting in measuring the force line of the knee joint; wherein the plurality of different joint rods are respectively controlled through different rotating switches, so that the navigation module and the measurement module are driven to rotate independently or together with the plurality of joint rods in different dimensions, and the measurement of the knee joint force line is completed. The tibia positioning and adjusting device is simple in structure and used for being combined with a portable navigation system to determine the force line of the knee joint.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic medical devices, and in particular to a tibial positioning and adjustment device. Background Technology

[0002] In knee replacement surgery, restoring the normal alignment of the knee joint is crucial for ensuring surgical success. The knee joint's alignment is typically a straight line running from the center of the hip joint to the center of the ankle joint, passing through the center of the knee joint. If the alignment deviates from its normal position, it can lead to excessive wear and tear on the joint, uneven load distribution, pain, joint dysfunction, and even surgical failure. Therefore, accurate determination of the alignment is essential in knee replacement surgery or other bone surgeries. Utility Model Content

[0003] This invention provides a simple tibial positioning adjustment device for use with a portable navigation system to determine the knee joint force line.

[0004] To address the aforementioned technical problems, this utility model provides a tibial positioning adjustment device, comprising:

[0005] A combined bar assembly, comprising multiple different combined bars;

[0006] The navigation module includes multiple navigation modules for assisting in the measurement of the knee joint force line, and the multiple navigation modules are detachably mounted on different connecting rods in the connecting rod assembly;

[0007] A measuring module is installed at both ends of the combined rod assembly to assist in measuring the force line of the knee joint;

[0008] The various connecting rods are controlled by different rotary switches to drive the navigation module and the measurement module to rotate in different dimensions, either alone or in conjunction with multiple connecting rods, in order to complete the measurement of the knee joint force line.

[0009] In some embodiments, the combined rod assembly includes a first combined rod and a second combined rod, the first combined rod and the second combined rod having one end aligned with the same direction and being rotatably connected, and the other ends of the first combined rod and the second combined rod being offset in the length direction.

[0010] In some embodiments, a connecting hook is provided between the first connecting rod and the second connecting rod, the two ends of the connecting hook being connected to the first connecting rod and the second connecting rod respectively, and being able to move relative to the first connecting rod.

[0011] In some embodiments, the connecting hook is L-shaped and includes a long rod and a short rod. The long rod extends into the first connecting rod and is movable along the length of the first connecting rod. The short rod is located outside the first connecting rod and extends into the second connecting rod, where it is connected.

[0012] In some embodiments, the first connecting rod is provided with a strip-shaped slot along its length, the strip-shaped slot penetrating the first connecting rod, and the long rod of the connecting hook corresponds to the position of the strip-shaped slot;

[0013] The tibial positioning adjustment device includes a first rotary switch, one end of which is rotatably connected to a fixed rod. The fixed rod is vertically inserted into a strip-shaped slot and a long rod, and can move relative to them. A locking member is also inserted on the fixed rod. When the first rotary switch is rotated, it can push the locking member to move along the fixed rod. When the locking member moves to abut against the long rod, it locks the long rod. When the locking member moves away from the long rod, the first connecting rod and the second connecting rod can rotate relative to each other, and drive the fixed rod and the long rod to move along the strip-shaped slot.

[0014] In some embodiments, the first connecting rod is longer than the second connecting rod, and the portion of the first connecting rod longer than the second connecting rod is fitted with an extension rod, which is movably connected to the first connecting rod to extend the first connecting rod;

[0015] The measurement module includes a first measurement module, which is connected to the end of the extension rod away from the second connecting rod.

[0016] In some embodiments, the combined rod assembly further includes a third combined rod, with the first and third combined rods located on opposite sides of the second combined rod, the first, second, and third combined rods abutting against each other and parallel to each other, and the third combined rod being rotatably connected to the second combined rod to allow the third and second combined rods to swing relative to each other;

[0017] The measurement module further includes a second measurement module, which is located at the end of the first and third connecting rods away from the first measurement module.

[0018] In some embodiments, the second connecting rod is provided with a limiting groove, and the third connecting rod is provided with an arc-shaped guide corresponding to the limiting groove. The limiting groove can move along the arc-shaped guide as the second connecting rod and the third connecting rod swing relative to each other.

[0019] In some embodiments, the tibial positioning adjustment device further includes a second rotary switch, one end of which extends into the second connecting rod and is rotatably connected to the second connecting rod. The end of the second rotary switch located inside the second connecting rod is connected to an elastic locking member, which can extend into the limiting groove and abut against the arc-shaped guide member, thereby locking the second connecting rod and the third connecting rod.

[0020] In some embodiments, both the first and third connecting rods are provided with tray assemblies, and the multiple navigation modules in the navigation module are respectively disposed on different tray assemblies.

[0021] Based on the disclosure of the above embodiments, it can be understood that the beneficial effects of this utility model embodiment include a simple overall structure, ease of fabrication, and only comprising: a combined rod assembly including multiple different combined rods; a navigation module including multiple navigation modules for assisting in measuring the knee joint force line, wherein the multiple navigation modules are detachably mounted on different combined rods in the combined rod assembly; and a measurement module mounted at both ends of the combined rod assembly for assisting in measuring the knee joint force line; wherein the multiple different combined rods are controlled by different rotary switches to enable the navigation module and measurement module to rotate independently or in conjunction with multiple combined rods in different dimensions to complete the measurement of the knee joint force line. The tibial positioning adjustment device in this embodiment can be used in conjunction with a portable navigation system to quickly and accurately determine the knee joint force line, assisting surgeons in adjusting the alignment of the patient's knee joint to align with the prosthesis, ensuring postoperative functional recovery of the knee joint and the correctness of the force line, thereby extending the prosthesis's lifespan and reducing postoperative complications. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the tibial positioning and adjustment device in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the tibia positioning and adjustment device from another angle in an embodiment of this utility model.

[0024] Figure 3 This is a partial structural schematic diagram of the tibia positioning and adjustment device in another embodiment of the present invention.

[0025] Figure 4 This is a partial structural schematic diagram of the tibia positioning and adjustment device in another embodiment of the present invention.

[0026] Figure label:

[0027] 1-First connecting rod; 2-Second connecting rod; 3-Connecting hook; 4-Strip slot; 5-First rotary switch; 6-Fixing rod; 7-Locking component; 8-First measuring module; 9-Third connecting rod; 10-Second measuring module; 11-Limiting groove; 12-Arc-shaped guide; 13-Second rotary switch; 14-Elastic locking component; 15-Tray assembly; 16-Extension rod. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0029] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope of this disclosure will be apparent to those skilled in the art.

[0030] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0031] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0032] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0033] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0034] Specific embodiments of the present disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure and can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of substantially any suitable detailed structures.

[0035] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0037] like Figure 1 and Figure 2 As shown, this embodiment of the present invention provides a tibial positioning adjustment device, comprising:

[0038] A combined bar assembly, comprising multiple different combined bars;

[0039] The navigation module includes multiple navigation modules for assisting in the measurement of the knee joint force line, and the multiple navigation modules are detachably mounted on different connecting rods in the connecting rod assembly;

[0040] A measuring module is installed at both ends of the combined rod assembly to assist in measuring the force line of the knee joint;

[0041] The various connecting rods are controlled by different rotary switches to drive the navigation module and the measurement module to rotate in different dimensions, either alone or in conjunction with multiple connecting rods, in order to complete the measurement of the knee joint force line.

[0042] The tibial positioning and adjustment device in this embodiment has a simple and lightweight overall structure. It can be used with a portable navigation system to provide accurate measurement of the knee joint force line in real time during knee surgery, ensuring the precise alignment of the femur and tibia during the operation. It assists the surgeon in adjusting the alignment of the patient's knee joint to align with the prosthesis, ensuring the functional recovery of the patient's knee joint and the correctness of the force line after surgery, thereby extending the service life of the prosthesis and reducing postoperative complications.

[0043] Combination Figure 1 and Figure 2 As shown, the combined rod assembly includes a first combined rod 1 and a second combined rod 2. The ends of the first combined rod 1 and the second combined rod 2 are flush and rotatably connected. The other ends of the first combined rod 1 and the second combined rod 2 are offset in the length direction.

[0044] In this embodiment, the length of the first connecting rod 1 is longer than that of the second connecting rod 2. The two rods are aligned at one end and connected to each other to form a whole, while the other end is naturally arranged based on the length difference between the rods.

[0045] A connecting hook 3 is provided between the first connecting rod 1 and the second connecting rod 2. The two ends of the connecting hook 3 are respectively connected to the first connecting rod 1 and the second connecting rod 2, and can move relative to the first connecting rod 1.

[0046] Specifically, such as Figure 3 and Figure 4As shown, the connecting hook 3 is L-shaped and includes a long rod and a short rod. The long rod extends into the first connecting rod 1 and can move along the length of the first connecting rod 1. The short rod is located outside the first connecting rod 1 and extends into the second connecting rod 2, connecting to the second connecting rod 2. In this embodiment, the connecting hook 3 is arranged in a figure-7 shape, with the long rod extending into the first connecting rod 1 and able to move relative to it. The short rod is vertically located outside the first connecting rod 1 and extends into the second connecting rod 2, connecting to it. At this time, the first connecting rod 1 and the second connecting rod 2 are connected as one unit.

[0047] Furthermore, the first connecting rod 1 has a strip-shaped slot 4 along its length, the strip-shaped slot 4 radially penetrating the first connecting rod 1, and the long rod of the connecting hook 3 corresponds to the position of the strip-shaped slot 4. The tibial positioning adjustment device includes a first rotary switch 5, one end of which is rotatably connected to a fixing rod 6. The fixing rod 6 is vertically inserted into the strip-shaped slot 4 and the long rod, and can move relative to them. A locking member 7 is also inserted into the fixing rod 6. The locking member 7 is plate-shaped, with a protrusion in the middle area extending into the strip-shaped slot 4. When the first rotary switch 5 is rotated, it can push the locking member 7 to move along the fixing rod 6. When the locking member 7 moves to the point where the protrusion abuts against the long rod, it locks the long rod. At this time, the first connecting rod 1 and the second connecting rod 2 cannot rotate to adjust the pitch angle. When the locking member 7 moves away from the long rod, the first connecting rod 1 and the second connecting rod 2 can rotate relative to each other, and drive the fixing rod 6 and the long rod to move along the strip-shaped slot 4. That is, the strip-shaped slot 4, the long rod and the fixing rod 6 are provided to enable the first connecting rod 1 and the second connecting rod 2 to rotate relative to each other.

[0048] As described above, the first connecting rod 1 is longer than the second connecting rod 2. To ensure that the length of the first connecting rod 1 can match the tibial length of different patients, in this embodiment, the portion of the first connecting rod 1 that is longer than the second connecting rod 2 is fitted with an extension rod. The extension rod is movably connected to the first connecting rod 1 to extend it. The extension rod and the first connecting rod 1 can be locked or unlocked by rotating a switch, or they can be movably connected by other concave and convex structures, etc. The specific method is not unique.

[0049] The measuring module includes a first measuring module 8, which is connected to the end of the extension rod away from the second connecting rod 2. In this embodiment, the first measuring module 8 includes a sliding seat connected to the first connecting rod 1, a probe rod passing through the sliding seat and capable of sliding relative to the sliding seat, and a probe hammer located at one end of the probe rod. When measuring the force line, the probe hammer is used to abut against the ankle bone. The probe rod is provided with graduations.

[0050] Continue to combine Figure 1 , Figure 3 and Figure 4 As shown, the combined rod assembly also includes a third combined rod 9. The first combined rod 1 and the third combined rod 9 are located on both sides of the second combined rod 2, and the first combined rod 1, the second combined rod 2, and the third combined rod 9 are close to each other and parallel to each other. The third combined rod 9 is rotatably connected to the second combined rod 2, and the third combined rod 9 and the second combined rod 2 can swing relative to each other. That is, the second combined rod 2 can drive the first combined rod 1 to move relative to the third combined rod 9, or the third combined rod 9 can also move relative to the second combined rod 2. The measuring module also includes a second measuring module 10, which is located at the end of the first combined rod 1 and the third combined rod 9 away from the first measuring module 8. The second measuring module 10 includes a probe with graduations corresponding to the probe graduations. The probe is detachably connected to the third combined rod 9 via a column. Of course, the second measuring module 10 may also include other structural components, and the specific components are not unique.

[0051] Furthermore, in this embodiment, the second connecting rod 2 is provided with a limiting groove 11, and the third connecting rod 9 is provided with an arc-shaped guide 12 corresponding to the limiting groove 11. The arc-shaped guide 12 is located within the limiting groove 11 and can move relative to the limiting groove 11 as the third connecting rod 9 and the second connecting rod 2 swing relative to each other. The cooperation between the guide and the limiting groove 11 is used to guide and limit the relative swing of the third connecting rod 9 and the second connecting rod 2.

[0052] The tibial positioning adjustment device also includes a second rotary switch 13, which is used to lock or release the third connecting rod 9 and the second connecting rod 2 to allow or prohibit their relative swinging. Specifically, one end of the second rotary switch 13 extends into the second connecting rod 2 and is rotatably connected to it, meaning the second rotary switch 13 can rotate relative to the second connecting rod 2. The end of the second rotary switch 13 located inside the second connecting rod 2 is connected to an elastic locking member 14. The elastic locking member 14 is located below the limiting groove 11 and can be pushed into the limiting groove 11 when the second rotary switch 13 rotates, so as to abut against the arc-shaped guide member 12, thereby restricting the movement of the arc-shaped guide member 12 relative to the limiting groove 11. In this way, the third connecting rod 9 and the second connecting rod 2 are locked, preventing their relative swinging, that is, preventing the third connecting rod 9 from swinging and the second connecting rod 2 from swinging. When the second rotary switch 13 is turned to move the elastic locking member 14 away from the limiting groove 11, the elastic locking member 14 separates from the arc-shaped guide member 12. At this time, the third connecting rod 9 and the second connecting rod 2 are in the unlocked state and can swing relative to each other.

[0053] In application, the elastic locking element 14 can be formed by connecting a spring to a locking element. Of course, the specific method is not limited to this and can be flexibly set.

[0054] The third connecting rod 9 is rigidly connected to the tibial pad at one end facing the first measuring module 8. The tibial pad can be connected to a strap to fix it to the patient's leg. Both the first connecting rod 1 and the third connecting rod 9 are equipped with tray assemblies 15, and multiple navigation modules in the navigation module are respectively mounted on different tray assemblies 15. The position and number of the tray assemblies 15 match the number and placement of the navigation modules in the navigation module.

[0055] When measuring the tibial alignment, the tibial positioning adjustment device is installed at the patient's tibial tuberosity. The second measuring module 10 is fixed to the proximal end of the tibia with bone screws, and is aligned with the upper edge of the tibial tuberosity. The distal end is fixed with a strap connected to the tibial pad. The length of the first connecting rod 1 is adjusted according to the actual length of the tibia until the two lengths match. At this point, the first rotary switch 5 and the second rotary switch 13 are locked. The navigation module is assembled in the corresponding tray assembly 15 and its operation is started. The first rotary switch 5 and the second rotary switch 13 are unlocked, and the positions of the first connecting rod 1, the second connecting rod 2, and the third connecting rod 9 are adjusted so that the two ends of the probe touch the patient's medial and lateral malleoli in sequence, and data is collected to calculate the tibial alignment.

[0056] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A tibial positioning adjustment device, characterized in that, include: A combined bar assembly, comprising multiple different combined bars; The navigation module includes multiple navigation modules for assisting in the measurement of the knee joint force line, and the multiple navigation modules are detachably mounted on different connecting rods in the connecting rod assembly; A measuring module is installed at both ends of the combined rod assembly to assist in measuring the force line of the knee joint; The various connecting rods are controlled by different rotary switches to drive the navigation module and the measurement module to rotate in different dimensions, either alone or in conjunction with multiple connecting rods, in order to complete the measurement of the knee joint force line.

2. The tibial positioning and adjustment device according to claim 1, characterized in that, The combined rod assembly includes a first combined rod and a second combined rod. The first and second combined rods are flush at one end and rotatably connected, while the other ends of the first and second combined rods are offset in the length direction.

3. The tibial positioning adjustment device according to claim 2, characterized in that, A connecting hook is provided between the first connecting rod and the second connecting rod. The two ends of the connecting hook are respectively connected to the first connecting rod and the second connecting rod, and can move relative to the first connecting rod.

4. The tibial positioning adjustment device according to claim 3, characterized in that, The connecting hook is L-shaped and includes a long rod and a short rod. The long rod extends into the first connecting rod and can move along the length of the first connecting rod. The short rod is located outside the first connecting rod and extends into the second connecting rod, where it is connected.

5. The tibial positioning adjustment device according to claim 4, characterized in that, The first connecting rod has a strip-shaped slot along its length, the strip-shaped slot radially penetrating the first connecting rod, and the long rod of the connecting hook corresponds to the position of the strip-shaped slot; The tibial positioning adjustment device includes a first rotary switch, one end of which is rotatably connected to a fixed rod. The fixed rod is vertically inserted into a strip-shaped slot and a long rod, and can move relative to them. A locking member is also inserted on the fixed rod. When the first rotary switch is rotated, it can push the locking member to move along the fixed rod. When the locking member moves to abut against the long rod, it locks the long rod. When the locking member moves away from the long rod, the first connecting rod and the second connecting rod can rotate relative to each other, and drive the fixed rod and the long rod to move along the strip-shaped slot.

6. The tibial positioning adjustment device according to claim 2, characterized in that, The first connecting rod is longer than the second connecting rod, and the portion of the first connecting rod that is longer than the second connecting rod is fitted with an extension rod. The extension rod is movably connected to the first connecting rod to extend the first connecting rod. The measurement module includes a first measurement module, which is connected to the end of the extension rod away from the second connecting rod.

7. The tibial positioning adjustment device according to claim 6, characterized in that, The combined rod assembly also includes a third combined rod. The first and third combined rods are located on both sides of the second combined rod. The first, second, and third combined rods are close to each other and parallel to each other. The third combined rod is rotatably connected to the second combined rod so that the third and second combined rods swing relative to each other. The measurement module further includes a second measurement module, which is located at the end of the first and third connecting rods away from the first measurement module.

8. The tibial positioning adjustment device according to claim 7, characterized in that, The second connecting rod is provided with a limiting groove, and the third connecting rod is provided with an arc-shaped guide corresponding to the limiting groove. The arc-shaped guide is located in the limiting groove, and the limiting groove can move along the arc-shaped guide as the second connecting rod and the third connecting rod swing relative to each other.

9. The tibial positioning adjustment device according to claim 8, characterized in that, The tibial positioning adjustment device also includes a second rotary switch. One end of the second rotary switch extends into the second connecting rod and is rotatably connected to the second connecting rod. One end of the second rotary switch located in the second connecting rod is connected to an elastic locking member. The elastic locking member can extend into the limiting groove and abut against the arc-shaped guide member, thereby locking the second connecting rod and the third connecting rod.

10. The tibial positioning adjustment device according to claim 7, characterized in that, Both the first and third connecting rods are equipped with tray assemblies, and the multiple navigation modules in the navigation module are respectively mounted on different tray assemblies.

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