A tool for arthroscopic localization and reduction of tibial plateau fractures

Abstract

This invention provides an arthroscopic tool for locating and reducing tibial plateau fractures, belonging to the field of medical device technology. The tool includes a positioning component for determining the X-position of the collapsed bone fragment and a guide calibration component for guiding the guide pin. The positioning component includes a first positioning arm, a second positioning arm, and a protrusion. The guide calibration component and the second positioning arm are located on the same side of the first positioning arm, and the second positioning arm is rotatably connected to the first positioning arm via a rotating component. The first and second positioning arms are connected by a rotating component, allowing the second positioning arm to be angled according to the patient's anatomical structure to accommodate individual differences. Furthermore, by setting the guide calibration component, the guide sleeve is always oriented towards the protrusion, maintaining the accuracy of the guiding path even when the first and second positioning arms rotate relative to each other.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an arthroscopic tool for locating and reducing tibial plateau fractures. Background Technology

[0002] In orthopedics, tibial plateau fractures are common intra-articular fractures, often caused by high-energy impacts or osteoporotic injuries. The goal of treatment is to achieve precise reduction of the articular surfaces and stable internal fixation to restore the anatomical structure and function of the knee joint and prevent complications such as traumatic arthritis. With the development of minimally invasive techniques, arthroscopic-assisted percutaneous reduction has become an important method for treating tibial plateau fractures due to its advantages such as minimal trauma, rapid recovery, and reduced soft tissue complications, making it increasingly popular among orthopedic surgeons.

[0003] Against this backdrop, the development of percutaneous reduction devices has become an important component of advancements in minimally invasive orthopedic techniques. According to existing technologies, such as the percutaneous reduction device for tibial plateau fractures disclosed in Chinese Utility Model Patent CN217366043U, this device includes a first clamping arm and a second clamping arm connected by a rotating structure. The first clamping arm abuts against the fracture collapse area, providing support and positioning; the second clamping arm has an insertion hole for guiding a guide pin or reduction device through, achieving minimally invasive fixation. This structural design allows for angle adjustment of the second clamping arm relative to the first clamping arm to accommodate anatomical differences in the tibial plateau among different patients, demonstrating certain clinical application value.

[0004] However, in actual use, because the second clamping arm can rotate relative to the first clamping arm, the position of its guide hole also changes accordingly, resulting in a spatial misalignment between the guide hole and the clamping end of the second clamping arm after angle adjustment. This misalignment affects the accuracy of the guide pin insertion path, thereby reducing the precision of reduction. Therefore, an arthroscopic tool for tibial plateau fracture localization and reduction is proposed. Summary of the Invention

[0005] This invention provides an arthroscopic tool for locating and reducing tibial plateau fractures, which solves the technical problem that while the percutaneous reduction device in the prior art has a certain degree of flexibility in structural design, it still has inaccurate positioning in actual operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] An arthroscopic tool for locating and reducing tibial plateau fractures includes a positioning component for determining the X position of the collapsed bone fragment and a guide calibration component for guiding a guide pin. The positioning component includes a first positioning arm, a second positioning arm, and a protrusion. The guide calibration component and the second positioning arm are located on the same side of the first positioning arm, and the second positioning arm is rotatably connected to the first positioning arm via a rotating component. The protrusion is fixedly installed on the other side of the first positioning arm. A guide sleeve is provided at the end of the guide calibration component away from the first positioning arm, and the extended line of the axis of the guide sleeve passes through the protrusion.

[0008] The first positioning arm reaches the tibial plateau through the positioning incision P and the protrusion abuts against the collapsed bone block X. The second positioning arm is located outside the body of the tibia and abuts against the outer side of the tibial body. The guide needle passes through the guide sleeve and the insertion incision Y through the lower part of the tibial body to reach the collapsed bone block X.

[0009] Optionally, the guide calibration component includes a fixed arm, one end of which is fixedly connected to a first positioning arm, and the other end of which has a groove. A telescopic arm is slidably installed inside the groove. A guide sleeve is fixedly installed at one end of the telescopic arm located in the groove. A cylindrical groove is provided inside the telescopic arm, and a connecting rod is slidably installed inside the cylindrical groove. One end of the connecting rod extends through to the outside of the telescopic arm and is fixedly connected to the inner surface of the groove. The connecting rod is T-shaped, and a first spring is sleeved on the outer surface of the connecting rod. One end of the first spring is connected to the inner wall of the cylindrical groove, and the other end of the first spring is fixedly connected to the end of the connecting rod.

[0010] Optionally, a connecting groove is provided on the outer surface of one side of the telescopic arm located in the slide groove. The opening direction of the connecting groove is perpendicular to the moving direction of the telescopic arm. A limit block is slidably installed inside the connecting groove. A second spring is fixedly connected between the limit block and the inner surface of the connecting groove. A limit groove corresponding to the limit block is provided on the surface of the fixed arm. When the limit block is inserted into the limit groove, the telescopic arm retracts into the fixed arm.

[0011] Optionally, the rotating component includes a shaft hole formed on the surface of the first positioning arm, a rotating shaft rotatably connected inside the shaft hole, one end of the rotating shaft being fixedly connected to the second positioning arm, and a sleeve being fixedly connected to the other end of the rotating shaft. A torsion spring is sleeved on the outer surface of the rotating shaft, one end of the torsion spring being fixedly connected to the sleeve, and the other end of the torsion spring being fixedly connected to the first positioning arm. In its natural state, the torsion spring causes the free end of the second positioning arm to approach the first positioning arm.

[0012] Optionally, it also includes a positioning trigger, the positioning trigger including a sliding sleeve fixedly inserted into the surface of the first positioning arm, a movable block slidably inserted inside the sliding sleeve, the movable block being arranged radially along the sleeve, a connecting sleeve fixedly connected to the surface of the movable block, a screw being sleeved inside the connecting sleeve, a threaded sleeve being fixedly connected to the outer surface of the sliding sleeve, and the screw being threadedly connected to the threaded sleeve.

[0013] Optionally, the movable block is fixedly connected to a uniformly distributed fixing pin on the side near the sleeve, and a rubber sleeve is fixedly fitted on the outer surface of the sleeve.

[0014] Optionally, a top block is fixedly connected to the end of the movable block away from the sleeve. The top block is inserted into the limiting groove. When the movable block abuts against the sleeve, the top block is inserted into the limiting groove, causing the limiting block to retract into the connecting groove.

[0015] Optionally, it also includes a guide rod assembly, the guide rod assembly including a hollow rod, the hollow rod being inserted into a guide sleeve, a window being opened in the middle of the outer surface of the hollow rod, an L-shaped insert plate being fixedly connected to the outer surface of the hollow rod, a slot being opened on the surface of the guide sleeve, and the long part of the insert plate being inserted into the slot.

[0016] Optionally, a steering cylinder is rotatably connected to the surface of the insert plate via a pin. A push rod is inserted at the center of the steering cylinder. Both ends of the push rod are configured as circular plate structures that are adapted to the inner diameter of the hollow rod. When the steering cylinder and the hollow rod are coaxial, the push rod moves into the hollow rod to provide pressure for the guide needle.

[0017] Optionally, a groove is formed on the surface of the second positioning arm, and a strap is inserted into the groove to fix the second positioning arm.

[0018] The beneficial effects of the above-described technical solution of the present invention are as follows:

[0019] In the above scheme, the first positioning arm and the second positioning arm are connected by a rotating component, which allows the second positioning arm to be adjusted in angle according to the patient's anatomical structure to adapt to the differences between different individuals. Furthermore, by setting a guide calibration component, it is ensured that the guide sleeve always faces the direction of the protrusion, so that the accuracy of the guide path can be maintained even when the first positioning arm and the second positioning arm rotate relative to each other. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the arthroscopic tibial plateau fracture localization and reduction tool of the present invention during positioning;

[0022] Figure 3This is an exploded view of the positioning component and guide calibration component in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0023] Figure 4 This is a cross-sectional view of the telescopic arm in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 This is a schematic diagram of the positioning trigger element in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0026] Figure 7 This is a schematic diagram of the guide rod assembly in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0027] Figure 8 This is a schematic diagram of the telescopic arm retracting in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention;

[0028] Figure 9 This is a schematic diagram of the guide pin insertion in the arthroscopic tibial plateau fracture localization and reduction tool of the present invention.

[0029] [Figure Labels]

[0030] 1. Positioning component; 11. First positioning arm; 12. Second positioning arm; 13. Protrusion;

[0031] 2. Guide calibration component; 21. Fixed arm; 22. Telescopic arm; 23. Slide groove; 24. Connecting rod; 25. Cylindrical groove; 26. Limiting block; 27. Connecting groove; 28. First spring; 29. ​​Second spring; 210. Limiting groove;

[0032] 3. Guide sleeve;

[0033] 4. Rotating component; 41. Shaft hole; 42. Sleeve; 43. Rotating shaft; 44. Torsion spring;

[0034] 5. Positioning trigger; 51. Moving block; 52. Fixing pin; 53. Sliding sleeve; 54. Connecting sleeve; 55. Screw; 56. Threaded sleeve; 57. Top block;

[0035] 6. Guide rod assembly; 61. Hollow rod; 62. Window; 63. Insert plate; 64. Slot; 65. Diverter cylinder; 66. Push rod; 67. Pin;

[0036] 7. Tank; 8. Straps. Detailed Implementation

[0037] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0038] like Figure 1 , Figure 8 as well as Figure 9 As shown, an embodiment of the present invention provides an arthroscopic tool for locating and reducing tibial plateau fractures. The tibial body includes a collapsed bone fragment X, an insertion incision Y, and a positioning incision P. The tool includes a positioning component 1 for determining the position of the collapsed bone fragment X and a guide calibration component 2 for guiding the guide needle. The positioning component 1 includes a first positioning arm 11, a second positioning arm 12, and a protrusion 13. The guide calibration component 2 and the second positioning arm 12 are located on the same side of the first positioning arm 11, and the second positioning arm 12 is rotatably connected to the first positioning arm 11 via a rotating component 4. The protrusion 13 is fixedly installed on the other side of the first positioning arm 11. The end of the guide calibration component 2 away from the first positioning arm 11 is provided with a guide sleeve 3, and the extended line of the axis of the guide sleeve 3 passes through the protrusion 13. The first positioning arm 11 reaches the tibial plateau through the positioning incision P, and the protrusion 13 abuts against the collapsed bone fragment X. The second positioning arm 12 is located outside the body and abuts against the lateral side of the tibial body. The guide needle passes through the guide sleeve 3 and the insertion incision Y, passes through the lower part of the tibial body, and reaches the collapsed bone fragment X.

[0039] In this embodiment, the first positioning arm 11 is inserted into the tibial plateau through the positioning incision P. Its end is provided with a protrusion 13 for contacting the collapsed bone fragment X, providing support and positioning. The protrusion 13 is designed with an appropriate curvature to conform to the physiological shape of the tibial plateau and improve contact stability. The second positioning arm 12 is located externally, abutting against the lateral side of the tibial body, providing auxiliary fixation and external support for subsequent guide pin insertion. The first positioning arm 11 and the second positioning arm 12 are connected by a rotating component 4, allowing the second positioning arm 12 to be angled according to the patient's anatomical structure to adapt to individual differences.

[0040] In addition, by setting the guide calibration component 2, the guide sleeve 3 is always oriented towards the protrusion 13, so that the accuracy of the guide path can be maintained even when the first positioning arm 11 and the second positioning arm 12 rotate relative to each other.

[0041] like Figures 1 to 4As shown, the guide calibration component 2 includes a fixed arm 21. One end of the fixed arm 21 is fixedly connected to the first positioning arm 11. The other end of the fixed arm 21 is provided with a slide groove 23. A telescopic arm 22 is slidably installed inside the slide groove 23. A guide sleeve 3 is fixedly installed at one end of the telescopic arm 22 located in the slide groove 23. A cylindrical groove 25 is provided inside the telescopic arm 22. A connecting rod 24 is slidably installed inside the cylindrical groove 25. One end of the connecting rod 24 extends through to the outside of the telescopic arm 22 and is fixedly connected to the inner surface of the slide groove 23. The connecting rod 24 is T-shaped. A first spring 28 is sleeved on the outer surface of the connecting rod 24. One end of the first spring 28 is connected to the inner wall of the cylindrical groove 25, and the other end of the first spring 28 is fixedly connected to the end of the connecting rod 24.

[0042] In the initial state, the first spring 28 is in a naturally extended state and the telescopic arm 22 is in an extended state, so that the guide sleeve 3 is always facing the protrusion 13 on the other side of the first positioning arm 11, thereby ensuring that the guide pin insertion path is aligned with the collapsed bone block X.

[0043] In actual operation, the doctor can first align the guide sleeve 3 with the target area, pass a rod through the guide sleeve 3 and gently touch the patient's skin surface to mark the puncture point. After marking, the doctor can perform the insertion incision Y operation at the marked point. To avoid the guide calibration component 2 interfering with the surgical area during the incision process, the operator can push the telescopic arm 22 inward along the direction of the slide groove 23, compressing the first spring 28, causing the telescopic arm 22 to retract into the fixed arm 21, thus providing sufficient operating space for the incision operation. After the incision is completed, the telescopic arm 22 is released, the first spring 28 returns to its original state, and the guide sleeve 3 automatically resets to its original guiding position, ensuring the accuracy of subsequent needle insertion.

[0044] like Figures 4 to 6 As shown, in order to ensure that the telescopic arm 22 can be stably located inside the fixed arm 21 when making a cut, a connecting groove 27 is provided on the outer surface of the side of the telescopic arm 22 located in the slide groove 23. The opening direction of the connecting groove 27 is perpendicular to the moving direction of the telescopic arm 22. A limit block 26 is slidably installed inside the connecting groove 27. A second spring 29 is fixedly connected between the limit block 26 and the inner surface of the connecting groove 27. A limit groove 210 corresponding to the limit block 26 is provided on the surface of the fixed arm 21. When the limit block 26 is inserted into the limit groove 210, the telescopic arm 22 retracts into the fixed arm 21.

[0045] Specifically, the limiting block 26 is always located within the slide groove 23. When the telescopic arm 22 is extended, the limiting block 26 is located inside the connecting groove 27, and the second spring 29 is compressed. When the doctor completes the puncture point marking and prepares to perform the insertion incision Y operation, in order to avoid the guide calibration component 2 interfering with the surgical area, the doctor manually applies a pushing force to push the telescopic arm 22 inward along the slide groove 23. As the telescopic arm 22 moves, the limiting block 26 gradually aligns with the limiting groove 210 on the fixed arm 21. When the limiting block 26 aligns with the limiting groove 210, the limiting block 26 automatically... The telescopic arm 22 pops out and embeds into the limiting groove 210. At this time, the telescopic arm 22 is mechanically locked inside the fixed arm 21 and cannot automatically pop out under the action of the first spring 28, thus achieving a stable retracted state. After the cutting operation is completed, if it is necessary to restore the guiding function of the guide sleeve 3, external force is manually applied to press the limiting block 26 inward, so that it is disengaged from the limiting groove 210. The limiting block 26 retracts back into the connecting groove 27, the second spring 29 is compressed, and under the push of the first spring 28, the telescopic arm 22 automatically slides out and returns to the initial extended state. The guide sleeve 3 is aligned with the direction of the protrusion 13 again, restoring the guiding function of the guide needle.

[0046] like Figure 3 As shown, the first positioning arm 11 and the second positioning arm 12 are rotatably connected by a rotating member 4, thereby forming an adjustable positioning structure for accurate positioning of the tibia. The rotating member 4 includes a shaft hole 41 opened on the surface of the first positioning arm 11. A rotating shaft 43 is rotatably connected inside the shaft hole 41. One end of the rotating shaft 43 is fixedly connected to the second positioning arm 12, and the other end of the rotating shaft 43 is fixedly connected to a sleeve 42. A torsion spring 44 is sleeved on the outer surface of the rotating shaft 43. One end of the torsion spring 44 is fixedly connected to the sleeve 42, and the other end of the torsion spring 44 is fixedly connected to the first positioning arm 11. In its natural state, the torsion spring 44 causes the free end of the second positioning arm 12 to approach the first positioning arm 11.

[0047] In practice, under arthroscopic guidance, the surgeon first inserts the first positioning arm 11 through a pre-designed positioning incision P and slowly guides it to the collapsed fracture site X, serving as a reference for subsequent positioning and surgical procedures. Simultaneously, the surgeon rotates the second positioning arm 12 around the pivot 43, positioning its lateral end against the lateral surface of the tibia. During this process, the second positioning arm 12 rotates against the torque of the torsion spring 44 to adapt to the contour of the tibia. Once the position is properly adjusted, the restoring force of the torsion spring 44 stabilizes the second positioning arm 12 against the tibia, working together with the first positioning arm 11 to clamp and fix the tibia.

[0048] like Figure 6As shown, the positioning trigger 5 can further improve the stability of the second positioning arm 12. The positioning trigger 5 includes a sliding sleeve 53 fixedly inserted into the surface of the first positioning arm 11. A moving block 51 is slidably inserted inside the sliding sleeve 53. The moving block 51 is arranged radially along the sleeve 42. A connecting sleeve 54 is fixedly connected to the surface of the moving block 51. A screw 55 is sleeved inside the connecting sleeve 54. A threaded sleeve 56 is fixedly connected to the outer surface of the sliding sleeve 53. The screw 55 is threadedly connected to the threaded sleeve 56. A uniformly distributed fixing pin 52 is fixedly connected to the side of the moving block 51 near the sleeve 42. A rubber sleeve is fixedly sleeved on the outer surface of the sleeve 42.

[0049] After the first positioning arm 11 and the second positioning arm 12 are clamped in place, the doctor tightens the screw 55. Since the screw 55 is threadedly connected to the threaded sleeve 56 fixed on the outer surface of the sliding sleeve 53, rotating the screw 55 will drive the moving block 51 to slide along the inside of the sliding sleeve 53 and move towards the sleeve 42. The moving block 51 has evenly distributed fixing pins 52 on the side near the sleeve 42. When the moving block 51 moves forward, the fixing pins 52 gradually approach and eventually pierce into the rubber sleeve outside the sleeve 42, thereby fixing the sleeve 42. Since the sleeve 42 is fixedly connected to the rotating shaft 43, the locking effect of the fixing pins 52 can prevent the rotating shaft 43 from rotating, thereby preventing the second positioning arm 12 from rebounding or shifting under the action of the torsion spring 44, further improving the stability and reliability of the second positioning arm 12 in the clamping state.

[0050] like Figure 6 As shown, in order to reduce the number of operation steps, a top block 57 is fixedly connected to the end of the moving block 51 away from the sleeve 42. The top block 57 is inserted into the limiting groove 210. When the moving block 51 abuts against the sleeve 42, the top block 57 is inserted into the limiting groove 210, causing the limiting block 26 to retract into the connecting groove 27.

[0051] As the moving block 51 moves toward the sleeve 42, the top block 57 at the end furthest from the sleeve 42 moves synchronously and gradually enters the limiting groove 210. The insertion of the top block 57 pushes the limiting block 26 back into the connecting groove 27, thereby releasing the locking effect of the limiting block 26 on the telescopic arm 22. This action is performed after the opening of the insertion incision Y is completed. Its purpose is to release the limiting structure after the telescopic arm 22 has completed the initial clamping and locking operation, providing convenience for subsequent operations. This structure integrates the positioning of the sleeve 42 and the release of the telescopic arm 22 into the same operation process, effectively reducing the steps required for separate positioning and release operations in traditional surgical instruments, simplifying the surgical procedure, and improving operational efficiency.

[0052] like Figure 7 and Figure 9As shown, the guide rod assembly 6 is used to assist in the insertion and positioning of the guide pin. The guide rod assembly 6 includes a hollow rod 61, which is inserted into the guide sleeve 3. A window 62 is opened in the middle of the outer surface of the hollow rod 61. An L-shaped insert plate 63 is fixedly connected to the outer surface of the hollow rod 61. A slot 64 is opened on the surface of the guide sleeve 3, and the long part of the insert plate 63 is inserted into the slot 64.

[0053] The hollow rod 61 can be inserted into the guide sleeve 3 to accommodate and guide the direction of the guide needle. A window 62 is provided on the outer surface of the middle part of the hollow rod 61 to facilitate observation of the insertion status of the guide needle in the hollow rod 61 during the operation, ensuring that the guide needle is correctly positioned and smoothly advanced. In addition, by setting the insertion plate 63 to engage with the slot 64, when the long part of the insertion plate 63 is inserted into the slot 64, a stable connection between the guide rod assembly 6 and the guide sleeve 3 can be achieved, preventing displacement or dislodgement during the operation, and further improving the accuracy of guidance and the safety of operation.

[0054] like Figure 7 As shown, in order to assist the insertion of the guide needle, the surface of the insert plate 63 is rotatably connected to the steering cylinder 65 by a pin 67. A push rod 66 is inserted at the center of the steering cylinder 65. Both ends of the push rod 66 are set as circular plate structures that are adapted to the inner diameter of the hollow rod 61.

[0055] When the steering cylinder 65 is coaxial with the hollow bar 61, the push rod 66 can slide along the axial direction of the hollow bar 61 to provide pressure for the guide needle and assist its insertion. For short guide needles, they can be directly inserted into the hollow bar 61 through the window 62 without rotating the steering cylinder 65, making the operation simple. For long guide needles, the steering cylinder 65 is first rotated around the pin 67 at a certain angle to offset it from the hollow bar 61, making space for the guide needle to be inserted. After insertion, the steering cylinder 65 is rotated back to the coaxial position with the hollow bar 61, and the pushing operation continues.

[0056] like Figure 1 and Figure 2 As shown, a groove 7 is provided on the surface of the second positioning arm 12, and a strap 8 is threaded through the groove 7 to fix the second positioning arm 12.

[0057] The groove 7 is used to accommodate the strap 8, which wraps around the outside of the patient's leg to securely fix the second positioning arm 12 in place and prevent displacement during the operation. The strap 8 can be made of a soft yet strong material to improve the patient's comfort when wearing it, and the tightness can be adjusted according to different patients' leg circumferences to enhance the adaptability and practicality of the device.

[0058] It should be noted that the guide pin can be a standard medical hollow drill rod. After the drill rod is driven into the collapsed bone fragment X using the positioning element 1 and the guide calibration element 2 to establish a channel, the binding strap 8 is released, and the positioning element 1 and the guide calibration element 2 are removed. A pry bar is then used to push up the collapsed bone fragment X through the channel until the collapsed bone fragment is lifted and repositioned. Since the channel direction is precisely determined by the guide sleeve 3, the pry bar can accurately reach below the collapsed bone fragment X by advancing along the channel.

[0059] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An arthroscopic tool for locating and reducing tibial plateau fractures, characterized in that, Includes a positioning element for determining the X position of the collapsed bone fragment and a guide calibration element for guiding the guide pin; The positioning component includes a first positioning arm, a second positioning arm, and a protrusion. The guide calibration component and the second positioning arm are located on the same side of the first positioning arm, and the second positioning arm is rotatably connected to the first positioning arm through a rotating component. The protrusion is fixedly installed on the other side of the first positioning arm. The guide calibration component has a guide sleeve at the end away from the first positioning arm, and the extended line of the axis of the guide sleeve passes through the protrusion. The first positioning arm reaches the tibial plateau through the positioning incision P and the protrusion abuts against the collapsed bone block X. The second positioning arm is located outside the body of the tibia and abuts against the outer side of the tibial body. The guide needle passes through the guide sleeve and the insertion incision Y and reaches the collapsed bone block X through the lower part of the tibial body.

2. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 1, characterized in that, The guide calibration component includes a fixed arm, one end of which is fixedly connected to a first positioning arm. The other end of the fixed arm has a groove, and a telescopic arm is slidably installed inside the groove. A guide sleeve is fixedly installed at one end of the telescopic arm located in the groove. A cylindrical groove is provided inside the telescopic arm, and a connecting rod is slidably installed inside the cylindrical groove. One end of the connecting rod extends through to the outside of the telescopic arm and is fixedly connected to the inner surface of the groove. The connecting rod is T-shaped, and a first spring is sleeved on the outer surface of the connecting rod. One end of the first spring is connected to the inner wall of the cylindrical groove, and the other end of the first spring is fixedly connected to the end of the connecting rod.

3. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 2, characterized in that, The telescopic arm has a connecting groove on one outer surface located in the sliding groove. The opening direction of the connecting groove is perpendicular to the moving direction of the telescopic arm. A limit block is slidably installed inside the connecting groove. A second spring is fixedly connected between the limit block and the inner surface of the connecting groove. A limit groove corresponding to the limit block is opened on the surface of the fixed arm. When the limit block is inserted into the limit groove, the telescopic arm retracts into the fixed arm.

4. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 3, characterized in that, The rotating component includes a shaft hole formed on the surface of the first positioning arm. A rotating shaft is rotatably connected inside the shaft hole. One end of the rotating shaft is fixedly connected to the second positioning arm, and the other end of the rotating shaft is fixedly connected to a sleeve. A torsion spring is sleeved on the outer surface of the rotating shaft. One end of the torsion spring is fixedly connected to the sleeve, and the other end of the torsion spring is fixedly connected to the first positioning arm. In its natural state, the torsion spring causes the free end of the second positioning arm to approach the first positioning arm.

5. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 4, characterized in that, It also includes a positioning trigger, which includes a sliding sleeve fixedly inserted into the surface of the first positioning arm, a movable block slidably inserted inside the sliding sleeve, the movable block being arranged radially along the sleeve, a connecting sleeve fixedly connected to the surface of the movable block, a screw being sleeved inside the connecting sleeve, and a threaded sleeve fixedly connected to the outer surface of the sliding sleeve, with the screw threadedly connected to the threaded sleeve.

6. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 5, characterized in that, The movable block is fixedly connected to a uniformly distributed fixing pin on the side near the sleeve, and a rubber sleeve is fixedly fitted on the outer surface of the sleeve.

7. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 6, characterized in that, The movable block is fixedly connected to a top block at the end away from the sleeve. The top block is inserted into the limiting groove. When the movable block abuts against the sleeve, the top block is inserted into the limiting groove, causing the limiting block to retract into the connecting groove.

8. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 1, characterized in that, It also includes a guide rod assembly, which includes a hollow rod that is inserted into a guide sleeve. A window is provided in the middle of the outer surface of the hollow rod. An L-shaped insert plate is fixedly connected to the outer surface of the hollow rod. A slot is provided on the surface of the guide sleeve. The long part of the insert plate is inserted into the slot.

9. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 8, characterized in that, The insert plate surface is rotatably connected to a steering cylinder via a pin. A push rod is inserted at the center of the steering cylinder. Both ends of the push rod are set as circular plate structures adapted to the inner diameter of the hollow rod. When the steering cylinder and the hollow rod are coaxial, the push rod moves into the hollow rod to provide pressure to the guide needle.

10. The arthroscopic tibial plateau fracture localization and reduction tool according to claim 1, characterized in that, The second positioning arm has a groove on its surface, and a strap is inserted into the groove to fix the second positioning arm.

Images