V-shaped guiding osteotomy device for correcting foot eversion

Abstract

The application provides a V-shaped guiding osteotomy device for foot eversion orthopedics, wherein the V-shaped guiding osteotomy device comprises a guiding blade, a positioning channel and a handle fixedly connected with the proximal end of the guiding blade; the guiding blade has a first blade and a second blade fixedly connected at a preset included angle; the guiding track defined by the first blade and the second blade jointly forms a spatial guiding path of V-shaped osteotomy; the preset included angle is 60-80 degrees; the positioning channel arranged at the connection position of the first blade and the second blade is arranged to be perpendicular to the bone surface of the first metatarsal bone in the axial direction; the axis of the handle is arranged in parallel and at intervals with the axis of the positioning channel; the device guides the guiding blade to complete the osteotomy at a preset angle at one time through the cooperation of the guiding blade and the positioning channel, ensures the accuracy of the osteotomy position and direction, reduces soft tissue injury, maximally reserves bone mass, avoids the thermal damage of conventional surgery to the local part, shortens the operation time and promotes postoperative rehabilitation.

Description

Technical Field

[0001] This application relates to the field of novel medical device technology, and in particular to a V-shaped guided osteotomy device for hallux valgus correction. Background Technology

[0002] Hallux valgus is a common orthopedic deformity, and patients with surgical indications usually require correction through first metatarsal osteotomy. Among these procedures, the Chevron osteotomy (also known as the V-shaped osteotomy) has become a classic surgical method for correcting distal first metatarsal deformities due to its advantages such as a large contact area, good intrinsic stability, and ease of adjustment. Patients with milder deformities are generally treated with the Chevron osteotomy.

[0003] However, in traditional surgical procedures, the angle, position, and depth of the V-shaped osteotomy are entirely determined by the surgeon's experience through visual estimation and manual manipulation during the operation. The accuracy of the osteotomy is highly dependent on the surgeon's experience and feel. The success of the surgery largely depends on the surgeon's understanding of individual anatomical variations and their ability to adapt to changing circumstances. The learning curve is long, and it is difficult to achieve stable and repeatable excellent results across different hospitals and doctors. Moreover, repeated instrument adjustments and trial osteotomies increase the potential risk of damage to surrounding soft tissues (such as tendons, nerves, and blood vessels).

[0004] In view of this, it is necessary to design a V-shaped guided osteotomy device for hallux valgus correction to solve one of the above problems. Summary of the Invention

[0005] This application provides a V-shaped guided osteotomy device for hallux valgus correction, which can realize the precision and standardization of hallux valgus osteotomy correction surgery, reduce the operation time and the impact of the operation on the patient, and facilitate the patient's postoperative recovery.

[0006] To achieve the above objectives, the technical solution provided in this application is as follows: This application provides a V-shaped guided osteotomy device for hallux valgus correction, the V-shaped guided osteotomy device comprising: The guide blade has a first blade and a second blade fixedly connected at a preset angle. The first blade and the second blade can define two intersecting guide tracks, which together form a spatial guide path for V-shaped osteotomy. The preset angle is 60°-80°. A positioning channel is provided at the connection between the first blade and the second blade, and the positioning channel is configured such that its axis is perpendicular to the bone surface of the first metatarsal bone; The handle is fixedly connected to the proximal end of the guide blade, and the axis of the handle is parallel to and spaced apart from the axis of the positioning channel.

[0007] Furthermore, the extension length of the first blade is greater than the extension length of the second blade, and the handle is fixed to the side of the first blade away from the corner.

[0008] Furthermore, the extension length of the first blade is 10mm-15mm, and the extension length of the second blade is 3mm-5mm.

[0009] Furthermore, the width of both the first blade and the second blade is 20mm-35mm, and the thickness of both the first blade and the second blade is 0.5mm-1mm.

[0010] Furthermore, the guide blade also includes depth scale marks that are evenly spaced along the width direction on the first blade and the second blade respectively.

[0011] Furthermore, the axis of the positioning channel is parallel to the straight line where the first blade and the second blade are connected. Furthermore, the inner diameter of the positioning channel is 1.5mm-2.0mm. Furthermore, it also includes a connection portion connecting the handle and the guide blade, wherein the positioning channel extends distally and passes through the connection portion in a proximal-to-distal direction.

[0012] Furthermore, the thickness of the connecting portion gradually decreases, and the inner surface of the connecting portion and the inner surface of the guide blade are smoothly connected.

[0013] Furthermore, it also includes a base fixed to the proximal end of the handle, wherein the maximum outer contour dimension of the cross-section of the base is greater than the outer diameter dimension of the handle.

[0014] Compared with related technologies, the beneficial effects of this application are as follows: by using the V-shaped guide osteotomy device for hallux valgus correction of this application, the guide blade is guided to complete the osteotomy in one go along the preset angle through the cooperation of the guide blade and the positioning channel, ensuring the accuracy of the osteotomy position and direction, reducing soft tissue damage, preserving bone volume to the maximum extent, avoiding local thermal damage and bone loss caused by conventional surgery, shortening the operation time, and promoting postoperative recovery. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the V-shaped guided osteotomy device for hallux valgus correction in this application.

[0016] Among them, 10-guide blade, 11-first blade, 12-second blade, 20-positioning channel, 30-handle, 40-connecting part, 50-base. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0018] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts are exaggerated relative to other structural parts, and are therefore only used to illustrate the basic structure of the subject matter of this application.

[0019] For ease of explanation, the V-shaped guided osteotomy device for hallux valgus correction in this application is defined as follows: the end closer to the surgeon is the proximal end, the end closer to the patient is the distal end, the side closer to the big toe is the medial side, and the side closer to the little toe is the lateral side.

[0020] This application provides a V-shaped guided osteotomy device for hallux valgus correction, such as... Figure 1 As shown, the guiding osteotomy device includes a guide 10, a positioning channel 20, and a handle 30 fixedly connected to the proximal end of the guide blade 10. The guiding osteotomy device is attached to the bone surface on the medial side of the distal end of the first metatarsal bone.

[0021] The guide blade 10 has a first blade 11 and a second blade 12 fixedly connected at a preset angle. The first blade 11 and the second blade 12 can define two intersecting guide tracks, which together form a spatial guide path for V-shaped osteotomy. Specifically, the cutting edges of the first blade 11 and the second blade 12 are aligned with the bone surface of the patient's first metatarsal. Along the extension direction of the first blade 11 and the second blade 12, a V-shaped osteotomy is cut in one go, reducing the number of osteotomy operations and the operation time. This fundamentally shortens the high-temperature friction time between the guide blade 10 and the bone. Due to the large oscillation amplitude, the bone loss will also increase. The guide blade 10 of this application avoids the risk of thermal damage to local bone tissue and bone loss to the greatest extent, which is beneficial to the patient's postoperative recovery.

[0022] Preferably, the preset angle is 60°-80°. This angle range provides the maximum contact area of ​​the osteotomy surface, achieving excellent initial stability and self-locking effect, which is conducive to bone healing. At the same time, it reserves space for appropriate translation or rotation correction of bone fragments during the operation. This device ensures that this optimal angle can be accurately reproduced in every operation through a precise guiding structure.

[0023] For special patients, a curved surface that conforms to the bone surface of the first metatarsal can be customized at the distal end of the first blade 11 and the second blade 12 according to the actual condition of the bone surface of the first metatarsal. The first blade 11 and the second blade 12 conform to the bone surface of the first metatarsal, which effectively prevents displacement during hammering or osteotomy, thereby ensuring that the osteotomy position and angle are completely consistent with the pre-set, greatly improving the accuracy of the operation.

[0024] The extension length of the first blade 11 is greater than the extension length of the second blade 12, and the handle 30 is fixed on the side of the first blade 11 away from the connection point, so as to facilitate the spaced arrangement with the directional channel 20.

[0025] The first blade 11 has an extension length of 10mm-15mm, and the second blade 12 has an extension length of 3mm-5mm. During the surgery, the osteotomy line corresponding to the second blade 12 penetrates the first metatarsophalangeal joint surface, eliminating the risk of iatrogenic joint injury. The first blade 11 extends along the shaft of the first metatarsal bone, providing the main bone contact area and length, responsible for bearing most of the postoperative stress and preventing bone fragments from shifting proximally. Together, they constitute a biomechanically optimal stable structure, preserving bone to the maximum extent and ensuring minimal invasiveness to distal soft tissues during the surgery.

[0026] The width of the first blade 11 and the second blade 12 is 20mm-35mm. This width is defined as the distance from the proximal end to the distal end of the guide blade 10. Generally speaking, the width (inner and outer diameter) of the first metatarsal bone is between 15mm and 25mm. The blade width of 20mm-35mm in this application can completely cover and exceed this width, ensuring that the guide blade 10 can cut through the cross-section of the first metatarsal bone to complete the effective osteotomy, while providing the necessary safety margin to prevent excessive damage. While ensuring the rigidity of the instrument structure, it also takes into account the exposure of the surgical field and the convenience of operation.

[0027] The thickness of the first blade 11 and the second blade 12 is 0.5mm-1mm, which ensures that the guide blade 10 achieves the best balance between rigidity and toughness. The blade needs to be thick enough to resist bending deformation, ensuring that its preset V-angle and guide path do not change during the hammering and bone cutting process.

[0028] Furthermore, the guide blade 10 also includes depth scale marks that are evenly spaced along the width direction on the first blade 11 and the second blade 12, respectively, to facilitate intraoperative monitoring of the real-time depth of bone cutting along the guide path, and to achieve visualization and precise control of the intraoperative osteotomy depth.

[0029] The positioning channel 20 is located at the connection between the first blade 11 and the second blade 12, and the positioning channel 20 is configured such that its axis is perpendicular to the bone surface of the first metatarsal bone, thereby allowing the positioning pin to be implanted into the bone at the optimal angle and achieving stable fixation of the guiding osteotomy device.

[0030] The axis of the positioning channel 20 is parallel to the straight line where the first blade 11 and the second blade 12 are connected, ensuring the accuracy of the guidance of the first blade 11 and the second blade 12 during the osteotomy process. Preferably, the inner diameter of the positioning channel 20 is 1.5mm-2.0mm, which can allow the positioning pin to pass through smoothly while also meeting the requirements of positioning accuracy. The axis of the handle 30 is parallel to and spaced apart from the axis of the positioning channel 20. This design separates the handle 30 from the positioning needle (osteotomy area) in space, avoiding accidental collisions between the surgeon's hand or hammer and the implanted positioning needle, reducing the risk of instrument slippage or secondary injury, and also preventing the handle 30 from obstructing the surgical field of vision. This design is in line with ergonomic optimization.

[0031] The handle 30 is cylindrical with an outer diameter of 10mm-15mm and a length of 100mm-150mm. The specifications of the handle 30 take into account both the surgeon's stable grip and sensitive touch, thereby improving the controllability of the surgery.

[0032] The guide osteotomy device also includes a connecting part 40 that connects the handle 30 and the guide blade 10. The thickness of the connecting part 40 gradually decreases in the direction from the proximal end to the distal end, and the inner surface of the connecting part and the inner surface of the guide blade 10 are smoothly connected, which can increase the structural strength of the guide osteotomy device.

[0033] In this embodiment, the positioning channel 20 extends distally and penetrates the connecting portion 40. Specifically, the positioning channel 20 includes a first segment penetrating the connecting portion and a second segment located between the connecting portion 40 and the patient. The second segment extends along the connection between the first blade 11 and the second blade 12. At the distal end of the positioning needle, the field of view is wide, which facilitates precise control of the positioning needle for positioning.

[0034] The guiding osteotomy device also includes a base 50 fixed to the proximal end of the handle 30. The maximum outer contour dimension of the cross-section of the base 50 is larger than the outer diameter dimension of the handle 30, which facilitates the surgeon to control the guiding osteotomy device well during the operation and makes it convenient to use a hammer to strike, so as to complete the operation smoothly.

[0035] In summary, the V-shaped guided osteotomy device for hallux valgus correction of this application, through the cooperation of the guide blade 10 and the positioning channel 20, guides the guide blade 10 to complete the osteotomy in one go along a preset angle, ensuring the accuracy of the osteotomy position and direction, reducing soft tissue damage, preserving bone volume to the maximum extent, avoiding local thermal damage caused by conventional surgery, shortening the operation time, and promoting postoperative recovery.

[0036] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0037] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent embodiments or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A V-shaped guided osteotomy device for hallux valgus correction, characterized in that, The guiding osteotomy device includes: The guide blade has a first blade and a second blade fixedly connected at a preset angle. The first blade and the second blade can define two intersecting guide tracks, which together form a spatial guide path for V-shaped osteotomy. The preset angle is 60°-80°. A positioning channel is provided at the connection between the first blade and the second blade, and the positioning channel is configured such that its axis is perpendicular to the bone surface of the first metatarsal. The handle is fixedly connected to the proximal end of the guide blade, and the axis of the handle is parallel to and spaced apart from the axis of the positioning channel.

2. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 1, characterized in that, The extension length of the first blade is greater than the extension length of the second blade, and the handle is fixed to the side of the first blade away from the corner.

3. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 2, characterized in that, The first blade has an extension length of 10mm-15mm, and the second blade has an extension length of 3mm-5mm.

4. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 3, characterized in that, The width of both the first and second blades is 20mm-35mm, and the thickness of both blades is 0.5mm-1mm.

5. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 4, characterized in that, The guide blade also includes depth scale marks that are evenly spaced along the width direction on the first blade and the second blade, respectively.

6. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 1, characterized in that, The axis of the positioning channel is parallel to the straight line where the first blade and the second blade are connected.

7. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 6, characterized in that, The inner diameter of the positioning channel is 1.5mm-2.0mm.

8. The V-shaped guided osteotomy device for hallux valgus correction as described in any one of claims 1 to 7, characterized in that, It also includes a connection portion that connects the handle and the guide blade, wherein the positioning channel extends distally and passes through the connection portion in a proximal-to-distal direction.

9. The V-shaped guide osteotomy device for hallux valgus correction as described in claim 8, characterized in that, The thickness of the connecting part gradually decreases, and the inner surface of the connecting part and the inner surface of the guide blade are smoothly connected.

10. The V-shaped guided osteotomy device for hallux valgus correction as described in any one of claims 1 to 7, characterized in that, It also includes a base fixed to the proximal end of the handle, wherein the maximum outer contour dimension of the cross-section of the base is greater than the outer diameter dimension of the handle.

Images