Hallux valgus osteotomy correction and internal fixation navigation device

Abstract

The present invention provides a hallux valgus osteotomy correction and internal fixation navigation device, which relates to the technical field of hallux valgus internal fixation, including a support rod with a protruding round head design on the left side and a "7"-shaped design on the right side. The fixing rod of the support rod is provided with evenly distributed insertion holes, and the first guide pin can be inserted into the insertion hole. The insertion hole is designed to be obliquely aligned. The top of the support rod is provided with a correction mechanism; the correction mechanism is provided with a guide pin groove, and a second guide pin is passed through the guide pin groove. The present invention can meet the needs of different hallux valgus patients for fixation surgery after correction by inserting the first guide pin into different insertion holes and forming triangles of different sizes between the second guide pin and the support rod; the propulsion rod rotates to push the dislocated metatarsal part of the hallux valgus part to align, which can save more effort.

Description

Technical Field

[0001] The present invention relates to the technical field of hallux valgus internal fixation, and in particular to a hallux valgus osteotomy correction and internal fixation navigation device. Background Art

[0002] Hallux valgus (Ballus valgus) is a forefoot deformity in which the big toe deviates outward beyond the normal physiological range at the first metatarsophalangeal joint. Commonly known as "big toe," it is one of the most common forefoot lesions and has become increasingly prevalent in recent years. Hallux valgus is a complex forefoot deformity involving multiple pathological changes, making its treatment extremely challenging.

[0003] The current hallux valgus osteotomy correction device requires complex surgery when used. First, the metatarsal bones of the hallux valgus need to be found surgically, and after correction, guide pins are used for fixation. However, because the misalignment between the metatarsal bones is corrected, the angle needs to be adjusted. Therefore, the angle when implanting the guide pin is very important. However, the current hallux valgus device requires multiple steps when used, which increases the surgical risk. Summary of the Invention

[0004] In response to the aforementioned technical issues with current hallux valgus devices, which require multiple procedures and increase surgical risks, a navigational device for hallux valgus osteotomy correction and internal fixation is provided. By inserting a first guide pin into different insertion holes and forming triangles of varying sizes between the second guide pin and the support rod, the present invention can accommodate post-correction fixation procedures for different hallux valgus patients.

[0005] The technical means adopted in the present invention are as follows:

[0006] A hallux valgus osteotomy correction and internal fixation navigation device, comprising: a support rod with a protruding round head design on the left side and a "7"-shaped structure design on the right side, the "7"-shaped structure including a fixing rod located on the lower right side;

[0007] The fixing rod is provided with evenly distributed insertion holes, the interior of the insertion holes is used to insert the first guide pin, and the insertion holes are designed to be obliquely aligned;

[0008] A correction mechanism is provided on the top of the support rod, a needle guide groove is provided inside the correction mechanism, a second guide needle passes through the needle guide groove, and the second guide needle is provided at a certain angle to the first guide needle.

[0009] Furthermore, an arc circle with a radius greater than, equal to, and less than the length of the second guide needle is drawn with a point 0.5 cm away from the tip of the second guide needle as the center of the circle. The arc circle forms an intersection when passing through the vertical center line of the fixed rod, and the intersection is the center point of the insertion hole.

[0010] Furthermore, the correction mechanism includes a fixed frame, a thread groove is opened inside the fixed frame, a feed thread is provided inside the thread groove, a push rod is threadedly connected to the inside of the thread groove, the needle guide groove is provided inside the push rod, and a rotating handle is coaxially fixedly installed on the right side of the push rod.

[0011] Furthermore, the first guide needle enters the insertion hole and the second guide needle enters the needle guide groove, and the angle formed by the two and the support rod form a triangle.

[0012] Furthermore, the left end of the push rod is clamped with a contact mechanism, which includes a clamping device composed of multiple clamping rods and a contact plate fixedly connected to the clamping device. The clamping rod is rotatably connected to the push rod, and a guide hole for the second guide needle to pass through is provided in the middle of the contact plate.

[0013] Furthermore, the clamping rod is provided with a protruding protruding rod on the end face close to the push rod, and a limiting groove is formed between the protruding rod and the clamping rod. The push rod is provided with a clamping groove on the end face in contact with the clamping rod. The clamping groove is annular and has a certain depth, and the protruding rod is clamped with the clamping groove.

[0014] Furthermore, a fixing plate with an angle adjustment function is fixedly installed on the top of the support rod, and the fixing plate is rotatably connected to the fixing frame of the correction mechanism.

[0015] Furthermore, a limiting plate with an arc of 90° is fixedly installed inside the fixed plate, and evenly distributed limiting teeth are fixedly installed on the inner side of the limiting plate, and the central angle between two adjacent limiting teeth is 5°.

[0016] Furthermore, when the fixing frame rotates inside the fixing plate along the angle of the limiting plate, the angle range of the fixing frame rotation is -45° to 45°.

[0017] Furthermore, the base of the fixed frame is fixedly installed with an adjustment mechanism on the internal rotating part of the fixed disk, and the adjustment mechanism includes a connecting rod fixedly connected to the base, a sliding groove is provided inside the connecting rod, and a limiting rod in contact with the limiting teeth is slidably connected inside the sliding groove, and a reset spring in contact with the limiting rod is also provided inside the sliding groove.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention can meet the needs of different hallux valgus patients for fixation surgery after correction by inserting different first guide pins into the insertion hole and forming triangles of different sizes between the second guide pin and the support rod.

[0020] 2. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention can push the dislocated metatarsal bones of the hallux valgus part to align by rotating the push rod, which can save more effort.

[0021] 3. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention is provided with an adjustment mechanism that can be rotated on the support rod. When the fixed frame rotates on the top of the support rod, the position of the push rod acting on the patient's bone surface can be selected, thereby applying force to different hallux valgus dislocation parts of different patients, achieving the effect of convenient use.

[0022] 4. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention uses a snap device to movably set the contact plate on the contact surface between the push rod and the bone surface through the snap rod. When the push rod is rotated to slide left and right, it avoids contact with the bone surface to generate torque, thereby protecting the patient's bone surface and relieving the patient's pain.

[0023] 5. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention can better fix the contact plate through the provision of a snap device, and is more stable and flexible when the contact plate rotates.

[0024] 6. The hallux valgus osteotomy correction and internal fixation navigation device provided by the present invention is equipped with a limit plate and limit teeth. When the base of the fixed frame rotates on the limit plate, it can cooperate with the action of the adjustment mechanism. Under the action of the reset spring, the connecting rod and the limit rod stay in two adjacent limit teeth, thereby facilitating the angle adjustment between the second guide needle and the support rod, and also ensuring the stability when the second guide needle is fixed at a certain angle.

[0025] In summary, the application of the technical solution of the present invention can solve the problem that the current hallux valgus device requires multiple procedures when in use, resulting in increased surgical risks.

[0026] Based on the above reasons, the present invention can be widely promoted in fields such as medical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 This is a front view of the hallux valgus osteotomy correction and internal fixation navigation device of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the correction mechanism in the present invention.

[0030] Figure 3 Schematic diagram of the connection between the insertion hole and the first guide needle in the present invention.

[0031] Figure 4 For the present invention Figure 1 A magnified schematic diagram of the structure in the middle.

[0032] Figure 5 It is a schematic diagram of the connection structure between the correction mechanism and the fixed disk in the present invention.

[0033] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure B in the middle.

[0034] Figure 7 The present invention is based on Figure 2 Schematic diagram of the correction mechanism and support rod at different angles.

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the contact mechanism in the present invention.

[0036] In the figure: 1. Support rod; 2. Fixed rod; 21. Insertion hole; 22. First guide needle; 3. Correction mechanism; 31. Fixed frame; 32. Threaded groove; 33. Push rod; 331. Snap-fit ​​groove; 34. Rotating handle; 4. Needle guide groove; 5. Second guide needle; 6. Contact mechanism; 61. Snap-fit ​​rod; 611. Protruding rod; 612. Limiting groove; 62. Contact plate; 7. Fixed disk; 71. Limiting disk; 72. Limiting teeth; 8. Adjustment mechanism; 81. Connecting rod; 82. Limiting rod; 83. Return spring. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0041] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0044] Example 1

[0045] like Figure 1 As shown, it is a schematic diagram of the planar structure of the hallux valgus correction device in this embodiment. The hallux valgus osteotomy correction and internal fixation navigation instrument includes a support rod 1 with a protruding round head design on the left and a "7"-shaped design on the right. The round head contacts the metatarsal bones. During the operation, the round head contacts the soft tissue at the dislocated part of the metatarsal bones, which can avoid damage to the soft tissue. A fixing rod 2 is fixedly installed at the bottom of the right side of the support rod 1. The cross-section of the fixing rod 2 is circular, and evenly distributed insertion holes 21 are opened on the fixing rod 2. The first guide pin 22 can be inserted into the insertion hole 21. The insertion hole 21 is obliquely aligned, and the aperture of the insertion hole 21 is 0.4-0.5 cm. When in use, the first guide pin 22 can be inserted into the insertion hole 21 to form a certain angle with the downward long end of the support rod 1.

[0046] In this embodiment, the oblique alignment design of the insertion hole 21 can better find the angle at which the first guide needle 22 is inserted obliquely below the support rod 1 into the metatarsal bone during surgery.

[0047] Moreover, in actual surgery, after inserting the first guide needle 22, professional punching equipment will be used to drill along the angle of insertion of the first guide needle 22. After the drilling is completed, a positioning bolt will be implanted. The positioning bolt will fix the corrected hallux valgus part, thereby forming the effect of hallux valgus correction. Finally, after it is completely fixed, the first guide needle 22 will be removed from the patient's metatarsal bone to complete the entire operation.

[0048] In another embodiment, Figure 2 As shown, a correction mechanism 3 is provided at the top of the support rod 1. This correction mechanism 3 comprises a fixed frame 31, within which a threaded groove 32 is defined. A feed thread is provided within the threaded groove 32. A push rod 33 is threadedly connected to the threaded groove 32. A rotating handle 34 is coaxially fixed to the right side of the push rod 33. Rotating the rotating handle 34 drives the push rod 33 to move left and right within the fixed frame 31, guided by the threaded groove 32. In this embodiment, a needle guide groove 4 is provided through the push rod 33. A second guide needle 5 is inserted into the needle guide groove 4.

[0049] In this embodiment, the hallux valgus portion of the metatarsal bone is exposed through minimally invasive surgery. The hallux valgus device is placed on the metatarsal bone using the round head and the support rod 1. The second guide needle 5 is then inserted and fixed into the patient's metatarsal bone. At this time, the push rod 33 is moved left and right to align the dislocated portions of the hallux valgus, reducing the angle of dislocation between the two portions. The correction effect is achieved. After the correction is completed, the second guide needle 5 can be removed from the needle guide slot 4.

[0050] In another embodiment, based on the above, Figure 3 As shown, the first guide needle 22 and the second guide needle 5 both include a needle tip and a needle handle. A center of a circle is set along the length direction of the second guide needle 5 and at a distance of 0.5 cm from the needle tip. An arc is then made with the second guide needle 5 as a radius to intersect with the fixed rod 2. The point where the arc intersects with the fixed rod 2 can be determined as the position of the insertion hole 21. When other arcs are made that are larger or smaller than the second guide needle 5, different insertion holes 21 can be obtained on the fixed rod 2. Therefore, during the production process, the positions between the insertion holes 21 can be obtained in this way.

[0051] It is worth noting that the first guide needle 22 enters the insertion hole 21 and the second guide needle 5 enters the needle guide groove 4, and the angle formed by the two and the support rod 1 form a triangle. Because the triangle has stability, the cooperation between the three can better correct and fix the metatarsal bones.

[0052] In this embodiment, the position of the insertion hole 21 found in this way allows the first guide needle 22 to better find the insertion angle when correcting the hallux valgus metatarsal bone, so that the positioning bolt can better fix the hallux valgus metatarsal bone part after correction.

[0053] In another embodiment, Figure 4 and Figure 8 As shown, the left end of the push rod 33 is engaged with a contact mechanism 6, which includes a snap-fit ​​device composed of multiple snap-fit ​​rods 61 and a contact plate 62 fixedly connected to the snap-fit ​​device. The snap-fit ​​rod 61 is rotatably connected to the left end of the push rod 33. The snap-fit ​​device can be a split type, an annular snap-fit ​​device composed of multiple split snap-fit ​​rods 61, or a single-piece snap-fit ​​device composed of a circular snap-fit ​​rod 61.

[0054] In this embodiment, the clamping rod 61 is provided with a protruding protruding rod 611 on the end face close to the push rod 33, and a limiting groove 612 is formed between the protruding rod 611 and the clamping rod 61. The push rod 33 is provided with a clamping groove 331 on the end face in contact with the clamping rod 61. The clamping groove 331 is annular and has a certain depth, and the protruding rod 611 is clamped with the clamping groove 331. During use, the contact plate 62 contacts the metatarsal bones of the foot, and the push rod 33 needs to rotate inside the fixed frame 31 in order to move to the left. In the prior art, if the contact plate 62 is rotated together with the push rod 33, since the contact plate 62 and the foot have friction, a torque will be generated at the contact point where the contact plate 62 contacts the bone surface, causing discomfort to the foot. Moreover, if the force is too great, it will cause local injury to the foot. Therefore, in this embodiment, the rotating contact plate 61 can prevent the contact plate 61 from rotating together with the push rod 33 during the rotation of the push rod 33, thereby avoiding the bone surface from being twisted and causing discomfort.

[0055] Moreover, in this embodiment, a guide hole for the second guide needle 5 to pass through is also provided in the middle of the contact mechanism.

[0056] Furthermore, the contact plate 62 has an arc-shaped design on the end surface that contacts the bone surface, and the width of the contact plate 62 is 1 cm and the length is 2 cm, which can better meet the requirements of the metatarsal bone.

[0057] In another embodiment, Figure 5As shown, in this embodiment, a fixed plate 7 is fixedly mounted on the top of the support rod 1, and the fixed plate 7 is rotatably connected to the fixed frame 31. By rotating the fixed frame 31 on the fixed plate 7, the angle between the correction mechanism 3 and the support rod 1 can be adjusted. A limit plate 71 with a 90° arc is fixedly mounted inside the fixed plate 7. Evenly distributed limit teeth 72 are fixedly mounted on the inner side of the limit plate 71, and the central angle between two adjacent limit teeth 72 is 5°.

[0058] In this embodiment, when the fixing frame 31 rotates within the fixing plate 7 along the angle of the limiting plate 71, the fixing frame 31 can rotate at an angle ranging from -45° to 45°. During surgery, the fixing frame 31 with the second guide needle 5 rotating on the support rod 1 can meet the needs of different patients. The restriction on the rotation angle of the fixing frame 31 can further facilitate operation.

[0059] like Figures 6 and 7 As shown, in another embodiment, the base of the fixed frame 31 is fixedly installed with an adjustment mechanism 8 on the internal rotating part of the fixed disk 7, and the adjustment mechanism 8 includes a connecting rod 81 fixedly connected to the base, a sliding groove is provided inside the connecting rod 81, and a limiting rod 82 that can contact the limiting teeth 72 is slidably connected inside the sliding groove, and a reset spring 83 that contacts the limiting rod 82 is also provided inside the sliding groove.

[0060] In this embodiment, when the angle of the second guide needle 5 needs to be adjusted, the base is rotated inside the fixed plate 71, and the limiting rod 82 contacts the limiting teeth 72. After reaching a certain angle, a stable shape can be formed, thereby achieving the effect of convenient angle adjustment.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A navigation device for hallux valgus osteotomy correction and internal fixation, characterized in that: include: The left side of the support rod is designed with a protruding round head, and the right side is designed with a "7"-shaped structure (1), and the "7"-shaped structure includes a fixing rod (2) located on the lower right side; The fixing rod (2) is provided with evenly distributed insertion holes (21), the interior of the insertion holes (21) is used to insert the first guide needle (22), and the insertion holes (21) are designed to be obliquely aligned; A correction mechanism (3) is provided on the top of the support rod (1), a needle guide groove (4) is provided inside the correction mechanism (3), and a second guide needle (5) passes through the inside of the needle guide groove (4); The correction mechanism (3) includes a fixed frame (31), a thread groove (32) is provided inside the fixed frame (31), a feed thread is provided inside the thread groove (32), a push rod (33) is connected to the thread inside the thread groove (32), the needle guide groove (4) is provided inside the push rod (33), and a rotating handle (34) is coaxially fixedly installed on the right side of the push rod (33); The left end of the push rod (33) is clamped with a contact mechanism (6), and the contact mechanism (6) includes a clamping device composed of a plurality of clamping rods (61) and a contact plate (62) fixedly connected to the clamping device. The clamping rods (61) are rotatably connected to the push rod (33), and a guide hole for the second guide needle (5) to pass through is provided in the middle of the contact plate (62); With the point 0.5 cm away from the needle tip of the second guide needle (5) as the center of the circle, an arc circle with a radius greater than, equal to, and less than the length of the second guide needle (5) is drawn. The arc circle forms an intersection when passing through the vertical center line of the fixing rod (2), and the intersection is the center point of the insertion hole (21).

2. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 1, characterized in that: The angle structure formed by the first guide needle (22) inserted into the insertion hole (21) and the second guide needle (5) entering the needle guide groove (4) is combined with the support rod (1) to form a triangle.

3. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 1, characterized in that: The clamping rod (61) is provided with a protruding protruding rod (611) on the end surface close to the push rod (33), and a limiting groove (612) is formed between the protruding rod (611) and the clamping rod (61). The push rod (33) is provided with a clamping groove (331) on the end surface in contact with the clamping rod (61). The clamping groove (331) is annular and has a certain depth. The protruding rod (611) is clamped with the clamping groove (331).

4. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 1, characterized in that: A fixed disk (7) with an angle adjustment function is fixedly mounted on the top of the support rod (1), and the fixed disk (7) is rotatably connected to the fixed frame (31) of the correction mechanism (3).

5. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 4, characterized in that: A limiting disk (71) with an arc of 90° is fixedly installed inside the fixed disk (7), and evenly distributed limiting teeth (72) are fixedly installed inside the limiting disk (71), and the central angle between two adjacent limiting teeth (72) is 5°.

6. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 5, characterized in that: When the fixed frame (31) rotates inside the fixed disk (7) along the angle of the limiting disk (71), the rotation angle range of the fixed frame (31) is -45° to 45°.

7. The hallux valgus osteotomy correction and internal fixation navigation device according to claim 5 or 6, characterized in that: The base of the fixed frame (31) is fixedly mounted with an adjustment mechanism (8) on the internal rotating portion of the fixed disk (7). The adjustment mechanism (8) includes a connecting rod (81) fixedly connected to the base. A sliding groove is provided inside the connecting rod (81). A limiting rod (82) in contact with the limiting teeth (72) is slidably connected inside the sliding groove. A return spring (83) in contact with the limiting rod (82) is also provided inside the sliding groove.

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