Knee joint adjustable positioning navigation device

Abstract

The utility model provides a knee joint adjustable positioning and navigation device which comprises a guide piece and a buckling piece. The guide piece is provided with a fitting area so as to be fitted at the corresponding position of the tibia; a nail placing hole is formed in the buckling piece and is suitable for guiding a nail to be placed; and the guide piece is detachably connected with the buckling piece. Therefore, after the adjustable positioning and navigation device for the knee joint finishes screw placement, the adjustable positioning and navigation device for the knee joint can be directly detached after the buckling and locking piece is detached, so that the positioning screw does not need to be pulled out, and specified position errors and too complicated screw placement process caused by secondary screw placement are avoided.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and more particularly, to an adjustable knee positioning navigation device. Background Art

[0002] The adjustable knee positioning navigation device is an important tool in current knee replacement surgeries.

[0003] However, the current adjustable knee positioning navigation device has the following problems in clinical actual surgeries: After the positioning pins are inserted, due to the concave characteristics of the tibial plateau, it is necessary to first pull out the positioning pins and then remove the adjustable knee positioning navigation device. This secondary pin insertion makes it easy for patients with poor bone quality to have pin insertion position errors, and also makes the usage process of the adjustable knee positioning navigation device too complicated. Utility Model Content

[0004] The problem solved by this application is that the existing adjustable knee positioning navigation device requires secondary pin insertion after pin insertion.

[0005] To solve the above problems, this application provides an adjustable knee positioning navigation device, which includes: a guiding member and a locking member;

[0006] A fitting area is provided on the guiding member to fit at the corresponding position of the tibia;

[0007] A pin insertion hole is provided on the locking member, which is suitable for guiding the insertion of pins;

[0008] The guiding member is detachably connected to the locking member.

[0009] Further, a locking hole is provided on the guiding member, the locking member includes a screwing portion and a locking portion, the locking portion is installed in the locking hole, and the screwing portion extends out of the locking hole for easy gripping.

[0010] Further, internal threads are provided on the locking hole, external threads are provided on the locking portion of the locking member, and the locking member is connected in the locking hole by threads.

[0011] Further, the locking hole is in the shape of a through hole, and a card slot is provided on the inner side surface; a card block is provided on the locking portion of the locking member, and the card block is installed in the card slot.

[0012] Further, the locking portion is cylindrical, and its size gradually decreases in the direction away from the screwing portion.

[0013] Further, the card slot has an exit slot along the axial direction of the locking hole and a locking slot along the circumferential direction of the locking hole, and the card block is stuck in the locking slot to achieve fixation.

[0014] Furthermore, a U-shaped opening facing the outside of the buckle is provided on the clamping block, and both sides of the U-shaped opening abut against both sides of the locking groove.

[0015] Furthermore, the width of the locking groove gradually decreases along the rotation direction of the buckle.

[0016] Furthermore, there are two buckle holes provided on the guiding member, and the number of the buckles corresponds to the number of the buckle holes one by one.

[0017] Furthermore, the screwing directions of the two buckle holes are opposite.

[0018] In this way, after the knee joint adjustable positioning navigation device finishes nail placement, the knee joint adjustable positioning navigation device can be directly removed after removing the buckle, so that there is no need to pull out the positioning nail, avoiding the specified position error caused by secondary nail placement and the overly complicated nail placement process. Description of the Drawings

[0019] Figure 1 It is a side schematic view of the knee joint adjustable positioning navigation device of the present application;

[0020] Figure 2 It is a front schematic view of the knee joint adjustable positioning navigation device of the present application;

[0021] Figure 3 It is a schematic view of the buckle of the knee joint adjustable positioning navigation device of the present application.

[0022] Description of the reference numerals: 1 - guiding member; 11 - fitting area; 12 - buckle hole; 13 - clamping groove; 2 - buckle; 21 - screwing part; 22 - locking part; 23 - clamping block; 24 - nail placement hole. Detailed Description of the Embodiments

[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application is given with reference to the drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0024] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the present application should have the ordinary meaning understood by those skilled in the art to which the present application belongs.

[0025] The knee joint adjustable positioning navigation device is an important tool in current knee joint replacement surgeries.

[0026] However, the current adjustable knee positioning navigation device has the following problems in actual clinical surgery: after the knee joint adjustable positioning navigation device is placed, due to the concave characteristics of the tibial plateau, the positioning nail needs to be pulled out first, and then the knee joint adjustable positioning navigation device is removed. This makes it easy for patients with poor bone conditions to have errors in the placement of the nails, and also makes the use of the knee joint adjustable positioning navigation device too complicated.

[0027] In view of the above problems, the present application provides an adjustable positioning navigation device for the knee joint, which can be directly removed after nail placement, thereby solving the problem of needing to place the nail a second time after nail placement.

[0028] In the present application, the direction perpendicular to the axis and pointing to the axis is “inside”, and the direction perpendicular to the axis and away from the axis is “outside”.

[0029] The present application embodiment provides a knee joint adjustable positioning navigation device, the structure of which is combined with Figures 1 - 3 As shown, the knee joint adjustable positioning navigation device comprises:

[0030] A guide member 1 and a locking member 2;

[0031] The guide member 1 is provided with a fitting area 11 to fit the corresponding position of the tibia;

[0032] The buckle lock 2 is provided with a nail placement hole 24 suitable for guiding the nail placement;

[0033] The guiding member 1 and the locking member 2 are detachably connected.

[0034] In the present application, the adjustable positioning and navigation device of the knee joint is partially fitted on the tibial plateau. Due to the concave characteristics of the tibial plateau, after the positioning pin is set, the entire adjustable positioning and navigation device of the knee joint cannot be taken out along the tail of the positioning pin, so that the positioning pin needs to be disassembled and the adjustable positioning and navigation device of the knee joint needs to be removed for a second time to complete the corresponding osteotomy.

[0035] In this way, before placing the nail, the guide member and the locking member are first fixedly connected, and the nail is placed at the corresponding position through the nail placement hole of the locking member to complete the setting of the positioning nail; then the locking member and the guide member are disassembled and taken out along the tail of the positioning nail. At this time, there is a large gap between the guide member and the positioning nail, which allows the guide member to produce a certain angle of deviation, thereby completely separating the fitting part of the guide member on the tibial plateau from the tibial plateau, so that the guide member can be taken out along the tail of the positioning nail.

[0036] In this way, after the adjustable knee joint positioning navigation device completes the nail placement, the guide part can be directly removed after removing the locking part, so there is no need to pull out the positioning nail, avoiding the designated position error caused by secondary nail placement and the overly complicated nail placement process.

[0037] In one embodiment, in combination with Figure 3 As shown, a latching hole 12 is provided on the guiding member 1. The latching member 2 includes a screwing portion 21 and a locking portion 22. The locking portion 22 is installed in the latching hole 12, and the screwing portion 21 extends out of the latching hole 12 for easy gripping.

[0038] In this way, the screwing portion is used for the user to grip and rotate, and the locking portion is used to cooperate with the latching hole to achieve detachable connection, so as to facilitate the installation of the latching member on the guiding member and the removal of the latching member from the guiding member.

[0039] In one embodiment, an internal thread is provided on the latching hole, and an external thread is provided on the locking portion of the latching member. The latching member is connected in the latching hole by a thread.

[0040] In this embodiment, the latching member is installed in the latching hole or disassembled from the latching hole by screwing. Thus, the structure is simple and the disassembly is convenient.

[0041] In one embodiment, in combination with Figure 3 As shown, the latching hole is in the shape of a through hole, and a clamping groove 13 is provided on the inner side surface; a clamping block 23 is provided on the locking portion of the latching member, and the clamping block 23 is installed in the clamping groove 13.

[0042] Different from the previous embodiment, in this embodiment, the installation and disassembly of the locking portion of the latching member and the latching hole are realized through the clamping block and the clamping groove. Through the arrangement of the clamping block and the clamping groove, the installation of the latching member in the latching hole can be completed without multiple rotations, and the removal from the latching hole can also be achieved.

[0043] In this way, the user can complete the installation, fixation and disassembly of the latching member by rotating a distance of less than 90°.

[0044] Among them, the clamping block 23 and the clamping groove 13 are in interference fit, so as to ensure the stable installation of the latching member and the latching hole.

[0045] Such as Figure 2 、 Figure 3 As shown, the latching hole is a cylindrical through hole, and the locking portion of the corresponding latching member is cylindrical, so as to ensure that the nail hole remains unchanged during the rotation of the latching member and ensure the nail driving accuracy of the entire knee joint adjustable positioning navigation device.

[0046] In one embodiment, the locking portion 22 is cylindrical, and the size gradually decreases along the direction away from the screwing portion 21.

[0047] In this application, such as Figure 3As shown, the buckle 2 includes an integral screwing part 21 and a locking part 22. Among them, the screwing part 21 is triangular prism-shaped to form an effect that is convenient for gripping; the locking part 22 is cylindrical.

[0048] Further, the locking part is cylindrical, but the diameter of the cylinder gradually decreases along the axis direction and away from the screwing part 21, thereby forming a structure similar to a cone (without the tip of the cone). The cross-section of this part along the axis direction is trapezoidal. That is to say, the locking part is similar to a cylinder, but as it moves away from the locking part, this similar cylinder gradually shrinks, forming a certain inclined surface.

[0049] In this way, through the gradual change of the size, a certain inclination angle is formed, so as to facilitate the extraction of the locking part 22 from the buckle hole 12.

[0050] Preferably, when the size of the locking part 22 gradually becomes smaller, the diameter of the through hole of the buckle hole 12 also gradually becomes smaller to adapt to the locking part 22, so as to maintain the dimensional accuracy when the locking part 22 is installed and fixed in the buckle hole 12.

[0051] In one embodiment, the card slot 13 has an exit slot along the axis of the buckle hole and a locking slot along the circumferential direction of the buckle hole (not shown in the figure). The card block is stuck in the locking slot to achieve fixation.

[0052] In this application, the exit slot is arranged along the axis direction of the buckle hole 12. When the card block 23 is inserted into the exit slot, as the card block 23 slides along the exit slot, the locking part 22 is inserted into the buckle hole 12, or is extracted from the buckle hole 12.

[0053] In this application, the locking slot is arranged to rotate around the axis direction of the buckle hole 12, that is, circumferentially arranged; when the card block 23 is inserted into the locking slot, as the card block 23 slides along the locking slot, the locking part 22 rotates around the axis direction of the buckle hole 12 in the buckle hole 12. At this time, the movement of the locking part 22 along the axis direction is limited to prevent the locking part 22 from being extracted from the buckle hole 12.

[0054] In this application, the exit slot and the locking slot are connected to each other and are exactly perpendicular to each other, so as to facilitate the card block to switch between the two slots.

[0055] In one embodiment, a U-shaped opening facing the outside of the buckle 2 is provided on the card block 23, and both sides of the U-shaped opening are abutted against both sides of the locking slot.

[0056] In this application, one side of the card block 23 facing away from the buckle 2 is open, and this opening penetrates through the two side surfaces of the card block 23 along the axis direction to form a U-shaped opening. Make a cross-section passing through the card block 23 and the axis of the buckle, and the U-shaped opening also appears as a U shape in this cross-section.

[0057] In the present application, the two sides of the U-shaped opening are two side surfaces, and the two side surfaces are perpendicular to the axial direction of the locking member 2 ; when the block 23 slides in the locking groove, the two side surfaces abut against the locking groove.

[0058] In the present application, a U-shaped opening is provided so that the two side surfaces are formed into a thin sheet shape, so as to achieve interference fit with the locking groove through deformation.

[0059] In one embodiment, the width of the locking groove gradually decreases along the rotation direction of the locking member.

[0060] In the present application, the width of the locking groove gradually decreases along the rotation direction of the locking member, that is, if the rotation direction of the locking member is right rotation, the width of the locking groove gradually decreases from left to right.

[0061] In this way, by cooperating with the U-shaped opening of the card block, the deformation degree on both sides of the opening is used to control the rotation distance of the entire locking member, thereby achieving tight fixation of the locking member and the locking hole.

[0062] In one embodiment, there are two snap-locking holes provided on the guide member, and the number of the snap-locking members corresponds to the number of the snap-locking holes.

[0063] In one embodiment, the two locking holes have opposite screwing directions.

[0064] In the present application, the screwing directions of the two snap locks and the snap lock holes are set to be exactly opposite, because the snap locks and the snap lock holes need to be firmly and accurately connected for a long time, and a large interaction force will be generated in the gap at the end of the fixation; this force may have a bad effect on the already fixed positioning pins, etc., such as causing the positioning pins to loosen. In the present application, the two screwing directions are set to be exactly opposite, so that when installing or removing the snap locks, the forces on the two snap lock holes can offset each other to avoid interference.

[0065] In one embodiment, the diameter of the locking portion is greater than 1 cm. Thus, after the buckle lock is removed, a 1 cm space can be reserved around the entire positioning pin, thereby facilitating the separation of the fitting area from the tibial plateau, achieving the removal of the knee joint adjustable positioning navigation device, and avoiding secondary pinning.

[0066] In one embodiment, the locking member is made of metal to avoid wear caused by the nail placement process and wear caused by the installation and removal of the locking member.

[0067] In one embodiment, Figure 1 and Figure 2As shown, the fitting area at least includes a first fitting area, a second fitting area, and a third fitting area. Among them, the first fitting area is used to fit the medial platform of the tibial plateau, the second fitting area is used to fit the lateral platform of the tibial plateau, and the tibial plane is the most easily fitted part of the tibial part. Fitting is performed in this part to achieve precise fitting of the tibial plane.

[0068] Among them, the medial platform is relatively large and concave from front to back and from inside to outside; the lateral platform is relatively small and convex from front to back and from outside to inside.

[0069] In this application, the third fitting area is used to fit the tibial tuberosity on the front side of the tibia, so as to achieve precise fitting of the articular adjustable positioning navigation device through three positioning points.

[0070] Preferably, it further includes a fourth fitting area, which is also used to fit the tibial tuberosity on the front side of the tibia; the fitting positions of the third fitting area and the fourth fitting area correspond to the nail placement positions respectively, so as to achieve precise nail placement and precise disassembly during fitting.

[0071] In the description of this application, it should be understood that the terms "high temperature" and "low temperature" are relative temperatures, not absolute temperatures. They are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have an absolute temperature. Therefore, it cannot be understood as a limitation to this application.

[0072] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to this application.

[0073] In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] In this application, unless otherwise clearly specified or limited, terms such as "arranged", "connected", "coupled", "communicated" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0075] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0076] In the description of this application, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0077] It should be noted that a large number of specific details are set forth in the specification provided here. However, it can be understood that the embodiments of this application can be practiced without these specific details. In some embodiments, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0078] The above are only the embodiments of this application and are not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A knee joint adjustable positioning navigation device, characterized in that: include: Guides and locking parts; The guide member is provided with a fitting area to fit the corresponding position of the tibia; The buckle lock is provided with a nail placement hole suitable for guiding the nail placement; The guiding member is detachably connected to the locking member.

2. The adjustable knee joint positioning navigation device according to claim 1, characterized in that: The guide member is provided with a buckle locking hole, and the buckle locking member comprises a screwing portion and a locking portion, the locking portion is installed in the buckle locking hole, and the screwing portion extends out of the buckle locking hole for easy holding.

3. The adjustable positioning navigation device for knee joint according to claim 2, characterized in that: The buckle locking hole is provided with an internal thread, the locking portion of the buckle locking piece is provided with an external thread, and the buckle locking piece is connected in the buckle locking hole through threads.

4. The adjustable knee joint positioning navigation device according to claim 2, characterized in that: The buckle locking hole is in the shape of a through hole, and a card slot is arranged on the inner side surface; a card block is arranged on the locking portion of the buckle locking member, and the card block is installed in the card slot.

5. The adjustable knee joint positioning navigation device according to claim 3 or 4, characterized in that: The locking portion is cylindrical, and its size gradually decreases in a direction away from the screwing portion.

6. The adjustable knee joint positioning navigation device according to claim 4, characterized in that: The clamping slot has an exit slot along the axial direction of the buckle locking hole and a locking slot along the circumference of the buckle locking hole, and the clamping block is clamped in the locking slot to achieve fixation.

7. The adjustable knee joint positioning navigation device according to claim 6, characterized in that: The clamping block is provided with a U-shaped opening facing the outside of the locking piece, and two sides of the U-shaped opening abut against two sides of the locking groove.

8. The adjustable knee joint positioning navigation device according to claim 6, characterized in that: The width of the locking groove gradually decreases along the rotation direction of the locking member.

9. The adjustable knee joint positioning navigation device according to any one of claims 1 to 4, characterized in that: There are two locking holes arranged on the guide member, and the number of the locking members corresponds to the number of the locking holes.

10. The adjustable knee joint positioning navigation device according to claim 9, characterized in that: The screwing directions of the two buckle locking holes are opposite.

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