Osteotomy dilator with angle measuring function

Abstract

The utility model relates to an osteotomy distractor with angle measurement, which comprises a handle, a support arm and a rotating shaft, the handle is provided with a driving component for driving the handle to be closed, and the handle is also provided with a measurement limiting component. The measurement limiting assembly comprises an arc-shaped track part arranged on one handle and a sliding part arranged on the arc-shaped track part in a sliding mode. The arc-shaped track part is arranged on one handle, the sliding part is arranged on the arc-shaped track part, and the sliding part can be fixed on the arc-shaped track part and is used as a preset angle limit to limit the maximum rotation angle of the other movable handle, so that the closing angle of the handles does not need to be controlled in an operation, and the operation is convenient. The surgical process can be accelerated, the first clamping part has the functions of scale marks and limiting, and the width of the first clamping part is increased on the premise that reading accuracy is kept due to staggered arrangement, so that the first clamping part has enough stress capacity to limit the other handle.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic retractors, specifically relating to a retractor for osteotomy surgery with a measuring angle. Background Technology

[0002] In orthopedic surgery, bone resection and reconstruction are often performed to correct the direction of force on the bones. Taking HTO (high tibial osteotomy) as an example, by correcting the varus angle of the proximal tibia, the abnormal force line of the knee joint is changed, and the mechanical axis is shifted from the medial side of the knee joint to slightly lateral to the midline of the knee joint. This reduces the pressure in the medial compartment, relieves pain, slows the progression of osteoarthritis, and may delay or avoid artificial joint replacement.

[0003] During the surgery, the bone needs to be cut, then a retractor is used to open it to a certain angle, a bone plate is implanted to re-fix the bone, and the gaps in the opened bone are filled. Existing retractors generally have an angle measuring structure, but lack a limiting function, which means that the handle of the retractor cannot stop automatically after reaching the predetermined angle. Medical staff need to control and adjust the angle during the operation, which prolongs the operation process. Utility Model Content

[0004] The purpose of this invention is to provide an osteotomy surgical retractor with a measuring angle to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] An osteotomy retractor with a measuring angle includes a handle, a support arm, and a rotating shaft. The handle is provided with a driving component for driving the handle to close together. The handle is also provided with a measuring limiting component, which includes an arc-shaped track portion disposed on one of the handles and a sliding portion slidably disposed on the arc-shaped track portion. The center of the arc-shaped track portion coincides with the rotating shaft. The sliding portion is fixed to the arc-shaped track portion by a fixing structure disposed on its surface. After the sliding portion is fixed to the arc-shaped track portion, it is used to limit the maximum stroke of the other handle.

[0007] As a further optimization of this utility model, the two surfaces at the ends of the support arm that are far apart from each other are provided with a number of hook points, which are used to hook the bone gaps and prevent the spreader from falling off.

[0008] As a further optimization of this utility model, the driving component includes a threaded rod, one of the handles is provided with a hinge, the hinge is connected to one end of the threaded rod, and a threaded sleeve is provided on the threaded rod to drive the two handles to move closer to each other. This solution proposes a specific structure of the driving component. This driving method is the prior art. The two handles are brought closer to each other by the relative rotation of the threaded sleeve and the threaded rod.

[0009] As a further optimization of this utility model, the outer surface of the threaded sleeve is provided with a shaft in the radial direction, and the shaft is rotatably connected to another handle. A rotatable connection part is also provided between the threaded rod and the hinge part. This solution further proposes a specific connection method between the threaded sleeve and the threaded rod.

[0010] As a further optimization of this utility model, the sliding part has an arc-shaped groove for accommodating the arc-shaped track part. The two sides of the arc-shaped track part are provided with first locking parts that are staggered with each other. The two side walls of the arc-shaped groove are provided with second locking parts. The second locking parts are engaged with the first locking parts. In this way, the edge line of the second locking part can be used as a scale to read the support angle.

[0011] As a further optimization of this utility model, the first snap-fit ​​part is a striped protrusion, and the second snap-fit ​​part is a striped groove.

[0012] As a further optimization of this utility model, the fixing structure is a fixing bolt set on both sides of the sliding part. The fixing bolt penetrates into the sliding part and is used to make the first snap-fit ​​part on the surface of the arc-shaped track part engage with the second snap-fit ​​part on one side of the arc-shaped groove for fixing. By setting the fixing bolt, the sliding part and the arc-shaped track part are fixed, so that the sliding part is firmly fixed on the arc-shaped track part, so as to withstand the pressure of the handle.

[0013] As a further optimization of this utility model, another handle is provided with a pressing part, which is used to contact the surface of the sliding part and limit the handle. The plane of the pressing part corresponds to the plane of the sliding part, and the plane of the pressing part can be used as a reference line for reading the scale. When the two support arms are closed, the reference line of the pressing part is aligned with the 0 mark on the arc-shaped track.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention features an arc-shaped track on one of the handles, with a sliding part fixed to it. This sliding part serves as a pre-set angle limiter, restricting the maximum rotation angle of the other handle. This eliminates the need to control the closing angle of the handles during surgery, thus accelerating the surgical process. The first locking part also functions as a scale and a limiter. The staggered arrangement increases the width of the first locking part while maintaining reading accuracy, ensuring it has sufficient force capacity to limit the other handle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0018] Figure 3 This is the utility model Figure 2 View from AA.

[0019] Figure 4 This is a schematic diagram of the scale reading method of this utility model.

[0020] In the diagram: 1. Spreader body; 11. Handle; 12. Rotating shaft; 13. Support arm; 14. Hook point; 15. Threaded rod; 16. Threaded sleeve; 17. Hinge; 18. Pressing part; 2. Measuring and limiting assembly; 21. Arc-shaped track; 22. First locking part; 23. Sliding part; 24. Arc-shaped groove; 25. Second locking part; 26. Fixing bolt. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Example 1

[0023] like Figure 1-4 As shown, an osteotomy retractor with a measuring angle includes a handle 11, a support arm 13, and a rotating shaft 12. The handle 11 is provided with a driving component for driving the handle 11 to close together. The handle 11 is also provided with a measuring limiting component 2. The measuring limiting component 2 includes an arc-shaped track portion 21 provided on one of the handles 11 and a sliding portion 23 slidably provided on the arc-shaped track portion 21. The center of the arc-shaped track portion 21 coincides with the rotating shaft 12. The sliding portion 23 is fixed to the arc-shaped track portion 21 by a fixing structure provided on its surface. After the sliding portion 23 is fixed to the arc-shaped track portion 21, it is used to limit the maximum stroke of the other handle 11.

[0024] This solution provides an arc-shaped track 21 on one of the handles 11 and a sliding part 23 on the arc-shaped track 21. The sliding part 23 can be fixed on the arc-shaped track 21 as a pre-set angle limiter to restrict the maximum angle of rotation of the other movable handle 11. This eliminates the need to control the closing angle of the handles 11 during surgery, thus speeding up the surgical process. The first locking part 22 serves as both a scale line and a limiter. The staggered arrangement increases the width of the first locking part 22 while maintaining reading accuracy, so that it has sufficient force capacity to limit the other handle 11.

[0025] The two surfaces at the ends of the support arm 13 that are far apart from each other are provided with several hook points 14. The hook points 14 are used to hook the bone gaps to prevent the spreader from falling off.

[0026] The driving component includes a threaded rod 15, and a hinge 17 is provided on one of the handles 11. The hinge 17 is connected to one end of the threaded rod 15. A threaded sleeve 16 is provided on the threaded rod 15 to drive the two handles 11 to move closer to each other. This solution proposes a specific structure of the driving component. This driving method is the prior art. The two handles 11 are brought closer to each other by the relative rotation of the threaded sleeve 16 and the threaded rod 15.

[0027] The outer surface of the threaded sleeve 16 is provided with a shaft along the radial direction. The shaft is rotatably connected to another handle 11. A rotatable connection is also provided between the threaded rod 15 and the hinge part 17. Furthermore, there are two ways to drive the two handles 11 to move closer to each other by the threaded rod 15. One way is to fix the threaded rod 15 without rotating it, while rotating the threaded sleeve 16. In this solution, the threaded sleeve 16 is connected to the handle 11, and the two handles 11 are driven to move closer by rotating the threaded rod 15. This method can use an external device to drive the threaded rod 15 to rotate, such as an electric tightener with fixed torque, which can speed up the surgical process.

[0028] The sliding part 23 has an arc-shaped groove 24 that accommodates the arc-shaped track part 21. The two sides of the arc-shaped track part 21 are provided with first engaging parts 22 intersecting each other. The two side walls of the arc-shaped groove 24 are provided with second engaging parts 25. The second engaging parts 25 are engaged with the first engaging parts 22. In this way, the edge of the second engaging part 25 can be used as a scale to read the support angle.

[0029] Furthermore, the first snap-fit ​​portion 22 is a striped protrusion, and the second snap-fit ​​portion 25 is a striped groove.

[0030] The fixing structure consists of fixing bolts 26 on both sides of the sliding part 23. The fixing bolts 26 penetrate into the sliding part 23 and are used to engage the first engaging part 22 on the surface of the arc-shaped track part 21 with the second engaging part 25 on one side of the arc-shaped groove 24. By fixing the sliding part 23 and the arc-shaped track part 21 with the fixing bolts 26, the sliding part 23 is firmly fixed on the arc-shaped track part 21 so that it can withstand the pressure of the handle 11.

[0031] Another handle 11 is provided with a crimping part 18, which is used to contact the surface of the sliding part 23 and limit the handle 11. The plane of the crimping part 18 corresponds to the plane of the sliding part 23, and the plane of the crimping part 18 can be used as a reference line for reading the scale. When the two support arms 13 are closed, the reference line of the crimping part 18 is aligned with the 0 mark on the arc track part 21.

[0032] The specific implementation method is as follows: Based on the patient's actual condition, the support angle for the osteotomy surgery is determined in advance, and the sliding part 23 is adjusted to the predetermined position, such as... Figure 4As shown, the scale is read through the first locking part 22. In this embodiment, the angle between the edges of adjacent first locking parts 22 is 2°, as shown by the dotted line. The first locking part 22 on this side corresponds to the even-numbered angle scale, while the first locking part 22 on the other side corresponds to the odd-numbered angle scale. The first locking part 22 has sufficient bearing capacity to fix the sliding part 23. After the sliding part 23 is fixed by the fixing bolt 26, the handle 11 is quickly driven to the predetermined position by the electric tightening device with a fixed torque. The sliding part 23 has sufficient bearing capacity to limit the movement and counteract excess force.

[0033] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A surgical retractor for osteotomy with a measuring angle, comprising a handle (11), a support arm (13), and a rotating shaft (12), wherein the handle (11) is provided with a driving component for driving the handle (11) to close, characterized in that: The handle (11) is also provided with a measuring limit component (2). The measuring limit component (2) includes an arc-shaped track (21) provided on one of the handles (11) and a sliding part (23) slidably provided on the arc-shaped track (21). The center of the arc-shaped track (21) coincides with the rotating shaft (12). The sliding part (23) is fixed to the arc-shaped track (21) by a fixing structure provided on its surface. After the sliding part (23) is fixed to the arc-shaped track (21), it is used to limit the maximum stroke of the other handle (11).

2. The osteotomy retractor with measuring angle according to claim 1, characterized in that: The two surfaces at the ends of the support arm (13) that are far apart from each other are provided with several hook points (14).

3. The osteotomy retractor with measuring angle according to claim 1, characterized in that: The driving component includes a threaded rod (15), and a hinge (17) is provided on one of the handles (11). The hinge (17) is connected to one end of the threaded rod (15), and a threaded sleeve (16) is provided on the threaded rod (15) to drive the two handles (11) to move closer to each other.

4. An osteotomy spacer according to claim 3, wherein: The outer surface of the threaded sleeve (16) is provided with a shaft in the radial direction, and the shaft is rotatably connected to another handle (11). A rotatable connection is also provided between the threaded rod (15) and the hinge (17).

5. An osteotomy spacer according to claim 1, wherein: The sliding part (23) has an arc groove (24) for accommodating the arc track part (21). The two sides of the arc track part (21) are provided with first engaging parts (22) interlaced with each other. The two side walls of the arc groove (24) are provided with second engaging parts (25), and the second engaging parts (25) engage with the first engaging parts (22).

6. The osteotomy retractor with measuring angle according to claim 5, characterized in that: The first snap-fit ​​part (22) is a striped protrusion, and the second snap-fit ​​part (25) is a striped groove.

7. The osteotomy retractor with measuring angle according to claim 6, characterized in that: The fixing structure is a fixing bolt (26) set on both sides of the sliding part (23). The fixing bolt (26) penetrates into the sliding part (23) and is used to make the first snap-fit ​​part (22) on the surface of the arc-shaped track part (21) engage and fix the second snap-fit ​​part (25) on one side of the arc-shaped groove (24).

8. The osteotomy retractor with measuring angle according to claim 1, characterized in that: Another handle (11) is provided with a crimping part (18) for contacting the surface of the sliding part (23) to limit the handle (11).

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