A femoral positioning and adjustment device

Abstract

This utility model provides a femoral positioning and adjustment device, comprising: a tray module for mounting different measuring instruments, the different measuring instruments being used to measure the knee joint alignment; a fixed module detachably connected to a portion of the tray module; and an adjustment module mounted on the fixed module and connected to another portion of the tray module, used to adjust the horizontal and vertical positions of the other portion of the tray module relative to the fixed module, so that the different measuring instruments can be used to determine the knee joint alignment. Different measuring instruments are mounted on different portions of the tray module. This utility model's femoral positioning and adjustment device has a simple structure and is used in conjunction with a portable navigation system to determine the knee joint alignment.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic medical devices, and in particular to a femoral 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 femoral positioning and adjustment device for use with a portable navigation system to determine the force line of the knee joint.

[0004] To solve the above-mentioned technical problems, this utility model provides a femoral positioning and adjustment device, comprising:

[0005] The tray module is used to assemble different measuring instruments, which are used to measure the force line of the knee joint.

[0006] A fixed module is detachably connected to a portion of the tray module;

[0007] An adjustment module is mounted on the fixed module and connected to another part of the tray module. It is used to adjust the horizontal and vertical positions of the other part of the tray module relative to the fixed module so that different measuring instruments can be used to determine the knee joint force line. Different measuring instruments are mounted on different parts of the tray module.

[0008] In some embodiments, the tray module includes a first tray and a second tray. The first tray is used to mount a first measuring device, and the second tray is used to mount a second measuring device. Multiple limiting posts are provided around the first tray and the second tray. The first measuring device and the second measuring device are used to cooperate in measuring the force line of the knee joint.

[0009] In some embodiments, the tray module further includes at least two auditory feedback devices respectively disposed on the first tray and the second tray, and the first tray and the second tray are respectively provided with fixing structures for limiting and fixing the corresponding measuring devices.

[0010] In some embodiments, the fixing structure is disposed on the limiting post. The fixing structure includes a navigation groove, one end of which is closed and the other end faces the corresponding tray. A limiting member is elastically disposed in the navigation groove. When the first measuring device or the second measuring device is installed in the corresponding tray, the limiting member is subjected to elastic force and abuts against the corresponding measuring device, thereby limiting the measuring device in the corresponding tray.

[0011] In some embodiments, the fixing module includes a bracket having a first portion and a second portion in a vertical direction, the second portion of the bracket being equipped with an adjustment module, and the first portion of the bracket being detachably connected to a first tray of the tray module.

[0012] In some embodiments, the first part of the support is a plate that can be connected to the femur. A beam is vertically inserted through the first part. One end of the beam is provided with a connecting component. The first tray is detachably connected to the connecting component. The beam is perpendicular to the first tray. The other end of the beam is fixed to the femur.

[0013] In some embodiments, the second part of the bracket has a U-shaped cross-section and has a base plate and two ear plates. The base plate has an adjustment window. The adjustment module includes a positioning rod and an adjustment component. The adjustment component is located between the two ear plates and can move relative to the two ear plates. The positioning rod passes through the adjustment window and the adjustment component, and one end is detachably connected to the second tray.

[0014] In some embodiments, the positioning rod is L-shaped and includes a horizontal rod and a vertical rod. The horizontal rod passes through the adjustment window and the adjustment assembly, and the vertical rod is detachably connected to the second tray.

[0015] In some embodiments, the adjusting assembly includes a rotating fixing column and a rotating column sleeved on the rotating fixing column. The rotating column has a through hole for the positioning rod to pass through. The positioning rod has a positioning column, and the rotating column has a positioning through hole. The positioning rod is correspondingly connected to the positioning through hole so that the rotating column and the positioning rod are correspondingly connected and can rotate relative to each other.

[0016] A first adjustment knob is screwed onto the rotating column. The first adjustment knob is perpendicular to the positioning rod and can abut against each other to lock the positioning rod and fix the relative position between the positioning rod and the rotating column.

[0017] A second adjustment knob is screwed onto the ear plate. The second adjustment knob passes through the ear plate to lock and fix the rotating column, preventing the rotating column and the positioning plate from rotating together around the rotating fixed column, or moving away from the rotating column, so that the rotating column and the positioning plate can rotate together around the rotating fixed column.

[0018] In some embodiments, the positioning rod is further provided with a positioning seat for assisting in positioning the positioning rod and the osteotomy device.

[0019] 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 tray module for assembling different measuring devices for measuring the knee joint force line; a fixed module detachably connected to a portion of the tray module; and an adjustment module mounted on the fixed module and connected to another part of the tray module, used to adjust the horizontal and vertical positions of the other part of the tray module relative to the fixed module, so that different measuring devices can be used to determine the knee joint force line, wherein different measuring devices are assembled on different parts of the tray module. The femoral 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. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the femoral positioning and adjustment device in an embodiment of the present invention.

[0021] Figure 2 This is a partial structural schematic diagram of the femoral positioning and adjustment device in another embodiment of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of the femoral positioning and adjustment device in another embodiment of the present invention.

[0023] Figure 4 This is a partial structural schematic diagram of the femoral positioning and adjustment device in another embodiment of the present invention.

[0024] Figure label:

[0025] 1-First tray; 2-Second tray; 3-Limiting post; 4-Auditory feedback device; 5-Fixing structure; 6-Limiting component; 7-Bracket; 8-First part; 9-Second part; 10-Beam; 11-Connecting assembly; 12-Adjusting window; 13-Positioning rod; 14-Rotating fixing post; 15-Rotating post; 16-Positioning post; 17-First adjusting knob; 18-Second adjusting knob; 19-Positioning seat. Detailed Implementation

[0026] 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.

[0027] 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 and spirit of this disclosure will be apparent to those skilled in the art.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] like Figure 1 As shown, this embodiment of the present invention provides a femoral positioning and adjustment device, comprising:

[0036] The tray module is used to assemble different measuring instruments, which are used to measure the force line of the knee joint.

[0037] A fixed module is detachably connected to a portion of the tray module;

[0038] An adjustment module is mounted on the fixed module and connected to another part of the tray module. It is used to adjust the horizontal and vertical positions of the other part of the tray module relative to the fixed module so that different measuring instruments can be used to determine the knee joint force line. Different measuring instruments are mounted on different parts of the tray module.

[0039] Because when the human thigh rotates around a point on the femur, a geometric positioning model can be established based on spatial geometry, allowing for the construction of a joint center navigation and positioning algorithm to achieve joint center navigation and positioning. Therefore, in practical applications, the femoral positioning and adjustment device in this embodiment can be mounted on the proximal end of the femur, i.e., the end adjacent to the knee joint, and used in conjunction with a measurement system containing measuring devices to determine the knee joint force line for the patient.

[0040] The femoral positioning and adjustment device in this embodiment has a simple overall structure, is easy to manufacture, and can fix multiple different measuring devices to measure the force line in combination, eliminating the need for frequent replacement of measuring devices and simplifying the operation for medical personnel.

[0041] Continue to combine Figure 1 As shown, the tray module includes a first tray 1 and a second tray 2. The first tray 1 is used to mount a first measuring device, and the second tray 2 is used to mount a second measuring device. The first and second measuring devices are used to measure the knee joint force line. In this embodiment, the first tray 1 and the second tray 2 are surrounded by multiple limiting posts 3. The trays and the limiting posts 3 form a space or cavity for assembling the measuring device. The space or cavity preferably matches the shape of the measuring device.

[0042] Furthermore, the tray module also includes at least two auditory feedback devices 4 respectively disposed on the first tray 1 and the second tray 2. In this embodiment, two auditory feedback devices 4 are disposed on the first tray 1 and the second tray 2 in a centrally symmetrical manner. In addition, in order to better fix the measuring device on the tray, the first tray 1 and the second tray 2 are also provided with fixing structures 5 for limiting and fixing the corresponding measuring device.

[0043] Specifically, in combination Figure 1As shown, the fixing structure 5 is disposed on the limiting post 3. The fixing structure 5 includes a navigation groove, one end of which is closed, and the other end faces into the corresponding tray. A limiting member 6 is elastically disposed in the navigation groove, for example, the limiting member 6 is a sphere (or other shapes, the specifics are not fixed), which is fixed in the navigation groove by a spring. In its natural state, at least part of the limiting member 6 extends out of the navigation groove based on the spring. When the first measuring device or the second measuring device is installed into the corresponding tray, the limiting member 6 is subjected to elastic force and abuts against the corresponding measuring device, thereby limiting the measuring device in the corresponding tray. In application, a groove can also be made on the outer shell of the measuring device at the position corresponding to the limiting member 6, so that the limiting member 6 can extend into the corresponding groove to increase the limiting force. Moreover, the number of fixing structures 5 is not fixed; they can be provided on each limiting post 3 or only on some of the limiting posts 3, and the method is not unique.

[0044] Continue to combine Figure 2 , Figure 3 and Figure 4 As shown, the fixing module includes a bracket 7, which has a first part 8 and a second part 9 in the vertical direction. The second part 9 of the bracket 7 is equipped with an adjustment module. The first part 8 of the bracket 7 is detachably connected to the first tray 1 of the tray module.

[0045] Specifically, in this embodiment, the first part 8 of the support 7 is a plate, which may be called a bone-attaching plate, and can be fixed to the femur by means of connectors such as nails. A beam 10 is vertically inserted through the first part 8, and a connecting component 11 is provided at one end of the beam 10. The first tray 1 is detachably connected to the connecting component 11. The beam 10 is perpendicular to the first tray 1, and a connecting nail can be provided at the other end of the beam 10 for fixing or contacting the femur.

[0046] The second part 9 of the bracket 7 has a concave cross-section and includes a base plate and two ear plates. The base plate has an adjustment window 12, the size of which is variable and can be adjusted according to actual needs. The adjustment module includes a positioning rod 13 and an adjustment assembly. The adjustment assembly is located between the two ear plates and can move relative to them. The positioning rod 13 is perpendicularly inserted through the adjustment window 12 and the adjustment assembly, and one end is detachably connected to the second tray 2. The positioning rod 13 and the adjustment assembly can move together relative to the adjustment window 12, or the positioning rod 13 can move independently of the adjustment window 12 and the adjustment assembly.

[0047] Continue to combine Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, the positioning rod 13 is L-shaped, including a horizontal rod and a vertical rod. The horizontal rod passes through the adjustment window 12 and the adjustment assembly. The vertical rod is detachably connected to the second tray 2, for example, through a connecting pin or other detachable connection method.

[0048] The adjustment assembly includes a rotating fixing post 14 perpendicular to the two ear plates and a rotating post 15 sleeved on the rotating fixing post 14. The rotating post 15 has a through hole in the radial direction, which communicates with the adjustment window 12, allowing the positioning rod 13 to pass through and rotate relative to it in the horizontal direction. For example, the positioning rod 13 has a positioning post 16, and the rotating post 15 has a positioning through hole. The positioning post 16 is inserted into the positioning through hole, so that the rotating post 15 and the positioning rod 13 are correspondingly connected, while also being able to rotate relative to each other. That is, the positioning rod 13 is allowed to rotate horizontally in the through hole and the adjustment window 12, thereby adjusting the position of the first tray 1.

[0049] A first adjusting knob 17 is screwed onto the rotating column 15. The first adjusting knob 17 is perpendicular to the positioning rod 13, and one end of it can move closer to the positioning rod 13 as it rotates until it abuts against the positioning rod 13 to lock the positioning rod 13 and fix the relative position between the positioning rod 13 and the rotating column 15. That is, the positioning rod 13 cannot rotate horizontally at this time. Only by loosening the first adjusting knob 17 and releasing the lock on the positioning rod 13 can the positioning rod 13 be driven to rotate horizontally.

[0050] A second adjustment knob 18 is screwed onto the ear plate. One end of the second adjustment knob 18 passes through the ear plate and moves closer to the rotating column 15 as it rotates, until it abuts against or partially extends into the rotating column 15 to lock and fix the rotating column 15, preventing the rotating column 15 and the positioning plate from rotating together around the rotating fixed column 14. Only when the second adjustment knob 18 is loosened, so that one end is away from the rotating column 15, can the rotating column 15 and the positioning plate be driven to rotate together around the rotating fixed column 14 to adjust the pitch angle of the first tray 1.

[0051] To better secure the positioning rod 13, a positioning seat 19 for assisting in positioning the positioning rod 13 and the osteotomer is also provided on the positioning rod 13. The positioning rod 13 and the positioning seat 19 are fixed together by bolts. To reduce weight, one or more holes can be made in both the positioning seat 19 and the rotating column 15 to reduce the weight of the instrument.

[0052] In practical application, a connecting pin is installed at the end of beam 10 that is not connected to the second tray 2. This connecting pin points to the opening point (center point of the knee joint) and is driven in. The first part 8 of the bracket 7 is close to the distal condyle of the human body and is fixed to the femur by bone screws. At this time, the first measuring device connected to the positioning rod 13 is close to the anterior side of the femur. The coordinates shown on the measuring device on the second tray 2 match the coordinates shown in the figure. Lock the first adjustment knob 17 and the second adjustment knob 18 to rotate the human knee joint around the femoral head, and wait for the accompanying software to display the force line related data.

[0053] Unlock the first adjustment knob 17 and the second adjustment knob 18, adjust the second measuring device to the desired osteotomy angle, and then fix the positioning seat 19 with bone screws. At this time, the measuring device can be removed, and the osteotomy guide plate or other instruments can be inserted into the positioning seat 19 to perform the osteotomy operation. That is, the positioning seat 19 in this embodiment is used to connect and fix the osteotomy guide plate or other osteotomy instruments.

[0054] 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 femoral positioning and adjustment device, characterized in that, include: The tray module is used to assemble different measuring instruments, which are used to measure the force line of the knee joint. A fixed module is detachably connected to a portion of the tray module; An adjustment module is mounted on the fixed module and connected to another part of the tray module. It is used to adjust the horizontal and vertical positions of the other part of the tray module relative to the fixed module so that different measuring instruments can be used to determine the knee joint force line. Different measuring instruments are mounted on different parts of the tray module.

2. The femoral positioning and adjustment device according to claim 1, characterized in that, The tray module includes a first tray and a second tray. The first tray is used to mount a first measuring device, and the second tray is used to mount a second measuring device. Multiple limiting posts are provided around the first tray and the second tray. The first measuring device and the second measuring device are used to cooperate in measuring the force line of the knee joint.

3. The femoral positioning and adjustment device according to claim 2, characterized in that, The tray module also includes at least two auditory feedback devices respectively disposed on the first tray and the second tray. The first tray and the second tray are also respectively provided with a fixing structure for limiting and fixing the corresponding measuring device.

4. The femoral positioning and adjustment device according to claim 3, characterized in that, The fixing structure is provided on the limiting post. The fixing structure includes a navigation groove, one end of which is closed and the other end faces the corresponding tray. A limiting member is elastically provided in the navigation groove. When the first measuring device or the second measuring device is installed in the corresponding tray, the limiting member is subjected to elastic force and abuts against the corresponding measuring device, thereby limiting the measuring device in the corresponding tray.

5. The femoral positioning and adjustment device according to claim 4, characterized in that, The fixing module includes a bracket, which has a first part and a second part in the vertical direction. The second part of the bracket is equipped with an adjustment module, and the first part of the bracket is detachably connected to the first tray of the tray module.

6. The femoral positioning and adjustment device according to claim 5, characterized in that, The first part of the bracket is a plate that can be connected to the femur. A beam is vertically inserted through the first part. One end of the beam is provided with a connecting component. The first tray is detachably connected to the connecting component. The beam is perpendicular to the first tray. The other end of the beam contacts and abuts against the femur.

7. The femoral positioning and adjustment device according to claim 5, characterized in that, The second part of the bracket has a concave cross-section and has a base plate and two ear plates. The base plate has an adjustment window. The adjustment module includes a positioning rod and an adjustment component. The adjustment component is located between the two ear plates and can move relative to the two ear plates. The positioning rod passes through the adjustment window and the adjustment component, and one end is detachably connected to the second tray.

8. The femoral positioning and adjustment device according to claim 7, characterized in that, The positioning rod is L-shaped and includes a horizontal rod and a vertical rod. The horizontal rod passes through the adjustment window and the adjustment assembly, and the vertical rod is detachably connected to the second tray.

9. The femoral positioning and adjustment device according to claim 7, characterized in that, The adjustment assembly includes a rotating fixed column and a rotating column sleeved on the rotating fixed column. The rotating column has a through hole for the positioning rod to pass through. The positioning rod has a positioning column, and the rotating column has a positioning through hole. The positioning column and the positioning through hole are correspondingly connected so that the rotating column and the positioning rod are correspondingly connected and can rotate relative to each other. A first adjustment knob is screwed onto the rotating column. The first adjustment knob is perpendicular to the positioning rod and can abut against each other to lock the positioning rod and fix the relative position between the positioning rod and the rotating column. A second adjustment knob is screwed onto the ear plate. The second adjustment knob passes through the ear plate to lock and fix the rotating column, preventing the rotating column and the positioning rod from rotating together around the rotating fixed column, or moving away from the rotating column, so that the rotating column and the positioning rod can rotate together around the rotating fixed column.

10. The femoral positioning and adjustment device according to claim 7, characterized in that, The positioning rod is also fitted with a positioning seat for assisting in positioning the positioning rod and the osteotomy device.

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