Posterior cruciate ligament repair tibial drill guide

Abstract

The present application relates to the technical field of medical devices, and discloses a posterior cruciate ligament repair tibial drilling guider, which comprises a positioning frame, a positioning spatula and a positioning rod; the positioning frame comprises an arc-shaped handle, two ends of the arc-shaped handle are respectively provided with an arc-shaped sliding rail and a guide handle, the positioning spatula is matched with the arc-shaped sliding rail and is adjustable in position on the arc-shaped sliding rail, a through guide hole is formed in the guide handle, the positioning rod is slidably arranged through the guide hole, a drilling channel for a bone drill is formed in the positioning rod, and a locking piece for limiting one-way sliding of the positioning rod is arranged on the guide handle; a sealing shaft is arranged on the end of the positioning rod. The positioning spatula is inserted from the rear incision, slides along the guide handle and is locked to complete tibial positioning, before drilling, the sealing shaft is slid and forms an annular sealing structure to prevent blood from interfering with the surgical field, during drilling, sterilizing liquid can be delivered to the drilling site through the elastic piston part to realize sterilization, reduce the influence of external environment, reduce the risk of postoperative infection, and improve the quality and safety of surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a tibial drilling guide for posterior cruciate ligament repair. Background Technology

[0002] In daily life, when ordinary people engage in strenuous exercise, the sudden increase in the intensity and range of motion of various parts of the body can easily lead to ligament sprains. When people make movements that exceed the normal range of motion of the joints, the posterior cruciate ligament of the knee joint is prone to tearing or even complete rupture due to excessive passive traction. This situation is often accompanied by other injuries such as knee sprains and fractures. After ligament injury, it is necessary to make accurate diagnosis, treatment and repair in time to prevent further damage and promote recovery. The tibial drilling guide for posterior cruciate ligament repair is an indispensable surgical instrument in posterior cruciate ligament repair surgery of the knee joint. In the process of posterior cruciate ligament repair surgery, the surgical operation is usually completed by inserting a positioning drill from the front to the back.

[0003] Tibial drilling guides typically have a positioning curette and a positioning rod connected to both ends of the positioning frame. The positioning rod has a through-hole for the bone drill to pass through. In actual operation, the positioning curette is inserted into the body through an incision on the posterior side to locate the posterior side of the tibia. Once the curette positioning is complete, the positioning frame and positioning rod are assembled. The anterior positioning position of the tibia is located, and the positioning rod is pushed forward to contact and position with the tibia. At this point, the positioning at both ends is complete. Then, the required angle is adjusted and the locking rod is tightened before drilling can begin.

[0004] During tibial drilling, a bone drill is first used to drill to a certain depth at the anterior end of the tibia. Then, a positioning rod is inserted into the drill hole to facilitate subsequent surgical procedures. However, the drilling process creates an open wound, which is susceptible to bacterial infection, increasing the risk of postoperative infection. In addition, during drilling, due to the destruction of local blood vessels, a large amount of blood flows down the leg, which interferes with the surgical field and increases the difficulty of the surgery.

[0005] To address the aforementioned issues, this application proposes a tibial drilling guide for posterior cruciate ligament repair. Summary of the Invention

[0006] This invention proposes a tibial drilling guide for posterior cruciate ligament repair, which solves the problems in related technologies where, during tibial drilling, the bone drill is first drilled to a certain depth before the positioning rod is inserted, but the drilling creates an open wound, which is prone to bacterial infection and increases the risk of postoperative infection. At the same time, local vascular damage causes blood to flow down the leg, interfering with the surgical field of vision and increasing the difficulty of the operation.

[0007] The tibial drilling guide for posterior cruciate ligament repair proposed in this invention includes a positioning frame, a positioning curette, and a positioning rod.

[0008] The positioning frame includes an arc-shaped handle, with an arc-shaped slide rail and a guide handle respectively installed at both ends of the arc-shaped handle. The positioning scraper cooperates with the arc-shaped slide rail and its position on the arc-shaped slide rail is adjustable. A through guide hole is opened in the guide handle, and the positioning rod slides through the guide hole. A drilling channel for the bone drill to pass through is opened in the positioning rod. A locking buckle is installed on the guide handle to restrict the one-way sliding of the positioning rod.

[0009] The end of the positioning rod is fitted with a sealing shaft, and a self-locking locking element is installed on the sealing shaft. One end of the sealing shaft is connected to a flexible sealing element fitted on the positioning rod, and a flow guide for guiding liquid is connected to the outer periphery of the sealing shaft.

[0010] The sealing shaft is equipped with a sterilization injection device that delivers the sterilization solution into the flexible seal.

[0011] As a further optimization of the present invention, the positioning scraper includes a handle, which is slidably sleeved on an arc-shaped slide rail. An arc-shaped slide groove is formed in the arc-shaped slide rail. A slider that slides in cooperation with the arc-shaped slide groove is installed on the handle. An arc-shaped groove is integrally formed on the outer side of the arc-shaped slide rail. One end of the handle is connected to a scraper rod for positioning the posterior side of the tibia. The other end of the handle is threaded with a locking screw that presses against the arc-shaped groove on the outer side of the arc-shaped slide rail.

[0012] As a further optimization of the present invention, the locking component includes a threaded head, a first spring, and a locking pin. The positioning rod has a toothed block integrally formed along its length. The outer side of the guide handle has a threaded hole communicating with the guide hole. The threaded head is threadedly connected to the threaded hole. One end of the threaded head is connected to the locking pin facing the positioning rod through the first spring. The end of the locking pin near the positioning rod is connected to a locking head, and the locking head cooperates with the toothed block to restrict the positioning rod from sliding unidirectionally within the guide hole of the guide handle.

[0013] As a further optimization of the present invention, the locking component includes a loading rod, a guide shaft, and a bolt. The inner wall of the sealing shaft is connected to the loading rod. The guide shaft is installed at one end of the loading rod and located in the middle of the sealing shaft. The guide shaft is sleeved on the positioning rod. The outer circumference of the sealing shaft is threaded with a bolt that passes through the guide shaft and presses against the positioning rod.

[0014] As a further optimization of the present invention, the flexible seal includes a flexible sealing cover and a ring body. One end of the sealing shaft is connected to the ring body through the flexible sealing cover. A fluid guiding channel communicating with the sealing shaft is formed inside the flexible sealing cover. A rubber ring for fitting with the leg drilling position is connected to the end of the ring body away from the flexible sealing cover.

[0015] As a further optimization of the present invention, the flow guide includes a flow guide tube and a valve body. The bottom side of the outer periphery of the sealing shaft is connected to the flow guide tube, which communicates with the interior of the shaft. The valve body is installed on the flow guide tube. The end of the flow guide tube away from the sealing shaft is connected to a liquid pump.

[0016] As a further optimization of the present invention, the sterilization injection component includes an injection cylinder and an elastic piston. The injection cylinder is installed on the outer periphery of the sealing shaft and arranged laterally. One end of the injection cylinder is connected to an injection pipe, which extends through the outer periphery of the ring body into it. A one-way valve is installed on the injection pipe. The injection cylinder is filled with sterilization liquid. The elastic piston is installed inside the injection cylinder and is used to push the sterilization liquid into the ring body along the injection pipe when subjected to force.

[0017] As a further optimization of the present invention, the elastic piston part includes a piston body, a push rod and a second spring. The piston body is slidably disposed in the injection cylinder. The push rod is connected to the side of the piston body and slides through the other end of the injection cylinder. The second spring is sleeved on the push rod and located inside the injection cylinder. The two ends of the second spring are respectively connected to the piston body and the inner wall of the other end of the injection cylinder. An air hole is opened at the other end of the injection cylinder, and the air hole is used for the piston body to slide smoothly in the injection cylinder.

[0018] As a further optimization of the present invention, one end of the injection cylinder is equipped with a liquid inlet for injecting the bactericidal liquid into the injection cylinder.

[0019] As a further optimization of the present invention, the liquid inlet includes a liquid inlet shaft, one end of the liquid injection cylinder is connected to the liquid inlet shaft which communicates with its interior, and a sealing plug is inserted into the liquid inlet shaft.

[0020] The above-described technical solution of the present invention has the following beneficial technical effects:

[0021] 1. In posterior cruciate ligament repair surgery, the positioning drill is usually inserted from the anterior to the posterior side. However, under arthroscopic guidance, the view is obstructed, and positioning is often determined by scale markings, increasing both surgical time and patient costs. In this invention, the curette handle is inserted into the body through a posterior incision in the leg to locate the posterior side of the tibia. The positioning rod slides along the guide handle of the positioning frame, with a locking mechanism restricting unidirectional sliding. The end presses against the anterior end of the tibia to complete initial positioning. Next, the slider on the handle slides along the arc-shaped rail of the positioning frame to adjust to the desired angle, and the locking screw is tightened to fix the position, completing the final positioning. Afterward, the drill bit passes through the drilling channel inside the positioning rod to drill a hole in the tibia. This design eliminates the need for component assembly when inserting the guide into the body, allows for separate positioning of both ends of the pre-drilled hole, and provides direct and accurate visualization under arthroscopy. The positioning frame also forms an aiming device to ensure accurate bone tunneling and improve surgical quality.

[0022] 2. In this invention, after the positioning curette and positioning rod are positioned, before drilling, the sealing shaft can be slid on the positioning rod so that the flexible seal on the sealing shaft comes into contact with the drilling area on the leg. The flexible seal then switches from an unfolded position to a retracted position, forming an annular sealing structure around the drilling area. Subsequently, the position of the sealing shaft on the positioning rod is fixed by the locking component. Blood generated during drilling can enter the sealing shaft along the flexible seal and then be discharged in time through the guide component. This design effectively avoids blood flowing down the leg and interfering with the surgical field of vision, making the surgical field of vision clearer, reducing the difficulty of the surgery, and improving the safety and efficiency of the surgery.

[0023] 3. After the flexible seal on the sealing shaft of the present invention comes into contact with the leg drilling area, the elastic piston on the sterilization injection part can be pushed to deliver part of the sterilization liquid into the flexible seal. The sterilization liquid then flows to the front end of the leg drilling area, which can play a sterilization role. Furthermore, the delivery of sterilization liquid and the sealing cooperation between the flexible seal and the drilling area can further reduce the impact of the external environment on the drilling area, reduce the risk of postoperative infection, and ensure the patient's postoperative recovery. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the tibial drilling guide for posterior cruciate ligament repair proposed in this invention.

[0025] Figure 2 This is a schematic diagram of the cooperative structure of the positioning frame, positioning scraper, and positioning rod of the present invention;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the rear structure;

[0027] Figure 4 This is a schematic diagram of the mating structure between the positioning rod and the locking element of the present invention;

[0028] Figure 5 This is a schematic diagram of the mating structure between the positioning rod and the sealing shaft of the present invention;

[0029] Figure 6 This is an internal sectional view of the sealing shaft of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the flexible sealing element of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the sterilization injection component of the present invention;

[0032] Figure 9 This is an internal cross-sectional view of the injection cylinder of the present invention.

[0033] Reference numerals: 1. Positioning frame; 101. Arc-shaped handle; 102. Arc-shaped slide rail; 103. Guide handle; 2. Positioning scraper; 21. Handle; 22. Scraper bar; 23. Locking screw; 24. Slider; 3. Positioning rod; 31. Tooth block; 4. Locking element; 41. Threaded head; 42. First spring; 43. Locking pin; 44. Locking head; 5. Sealing shaft; 6. Locking element; 61. Loading rod; 62. Guide shaft 63. Bolt; 7. Flexible seal; 71. Flexible sealing cover; 72. Ring; 73. Rubber ring; 8. Flow guide; 81. Flow guide tube; 82. Valve body; 9. Sterilization injection component; 91. Injection cylinder; 911. Injection tube; 912. One-way valve; 913. Air hole; 92. Elastic piston part; 921. Piston body; 922. Push rod; 923. Second spring; 93. Inlet shaft; 931. Sealing plug. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0035] like Figures 1-9 As shown, the tibial drilling guide for posterior cruciate ligament repair proposed in this invention includes a positioning frame 1, a positioning curette 2, and a positioning rod 3;

[0036] The positioning frame 1 includes an arc-shaped handle 101. Arc-shaped slide rails 102 and guide handles 103 are respectively installed at both ends of the arc-shaped handle 101. The positioning scraper 2 cooperates with the arc-shaped slide rails 102 and its position on the arc-shaped slide rails 102 is adjustable. A through guide hole is opened in the guide handle 103. The positioning rod 3 slides through the guide hole. A drilling channel for the bone drill to pass through is opened in the positioning rod 3. A locking buckle 4 is installed on the guide handle 103 to restrict the one-way sliding of the positioning rod 3.

[0037] The end of the positioning rod 3 is fitted with a sealing shaft 5, and a self-locking locking element 6 is installed on the sealing shaft 5. One end of the sealing shaft 5 is connected to a flexible sealing element 7 fitted on the positioning rod 3, and a flow guide element 8 for guiding liquid flow is connected to the outer periphery of the sealing shaft 5.

[0038] A sterilization injection component 9 is installed on the sealing shaft 5 to deliver the sterilization solution into the flexible seal 7.

[0039] In use, the positioning scraper 2 is inserted into the body through an incision on the posterior side of the leg to locate the posterior side of the tibia. The positioning rod 3 slides on the guide handle 103 of the positioning frame 1, and its unidirectional sliding is restricted by the locking fastener 4, so that the end of the positioning rod 3 finds the positioning position of the anterior end of the tibia and contacts and presses against the tibia to complete the initial positioning. Then, the slider 24 on the handle 21 slides on the arc-shaped slide rail 102 of the positioning frame 1 to adjust to the required angle. Then, the locking screw 23 is tightened to fix the position of the handle 21 on the arc-shaped slide rail 102 to complete the final positioning. The sealing shaft 5 slides on the positioning rod 3, so that the flexible part of the sealing shaft 5... When the seal 7 comes into contact with the drilled area on the leg, the flexible seal 7 immediately switches from an extended position to a retracted position, forming an annular sealing structure around the drilled area. Then, the locking member 6 fixes the position of the sealing shaft 5 on the positioning rod 3. By pushing the elastic piston part 92 on the sterilization injection part 9, some of the sterilization liquid inside is delivered into the flexible seal 7. The sterilization liquid then flows to the front end of the drilled area on the leg, which can play a sterilization role. Then, the drill bit is passed through the drill channel in the positioning rod 3 to drill the tibia. The blood generated during drilling can enter the sealing shaft 5 along the flexible seal 7, and then be discharged in time through the guide member 8.

[0040] In this embodiment, the positioning scraper 2 includes a handle 21, which is slidably fitted onto an arc-shaped slide rail 102. An arc-shaped groove is formed inside the arc-shaped slide rail 102. A slider 24 that slides in conjunction with the arc-shaped groove is mounted on the handle 21. An arc-shaped groove is integrally formed on the outer side of the arc-shaped slide rail 102. One end of the handle 21 is connected to a scraper rod 22 for positioning the posterior side of the tibia, and the other end of the handle 21 is threaded with a locking screw 23 that presses against the arc-shaped groove on the outer side of the arc-shaped slide rail 102. During use, the hand... The slider 24 on the handle 21 slides on the arc-shaped slide rail 102 to adjust the position of the curette bar 22. The curette bar 22 is used to penetrate deep into the body to find the positioning point on the posterior side of the tibia and to achieve the positioning of the posterior end of the tibia. After adjusting to the appropriate position, the locking screw 23 is rotated to press it against the arc-shaped groove on the outer side of the arc-shaped slide rail 102, thereby fixing the handle 21 on the arc-shaped slide rail 102 and preventing the positioning curette 2 from shifting during the operation. This design allows the position of the positioning curette 2 to be flexibly adjusted to ensure accurate positioning of the posterior side of the tibia.

[0041] It should be noted that after the positioning scraper 2 and the positioning rod 3 are installed on the positioning frame 1, no matter how the position of the positioning scraper 2 on the arc-shaped slide rail 102 is adjusted, the positioning scraper 2 and the positioning rod 3 will always intersect at the center of the arc-shaped handle 101.

[0042] In this embodiment, the locking component 4 includes a threaded head 41, a first spring 42, and a locking pin 43. A toothed block 31 is integrally formed on the positioning rod 3 along its length. A threaded hole communicating with a guide hole is opened on the outer side of the guide handle 103. The threaded head 41 is threaded into the threaded hole. One end of the threaded head 41 is connected to the locking pin 43 facing the positioning rod 3 via the first spring 42. A locking head 44 is connected to the end of the locking pin 43 near the positioning rod 3, and the locking head 44 cooperates with the toothed block 31 to restrict the positioning rod 3 from sliding unidirectionally within the guide hole of the guide handle 103. The first spring 42 exerts an elastic force on the locking pin 43, ensuring that the locking head 44 on the locking pin 43 is always tightly engaged with the toothed block 31 of the positioning rod 3. When the positioning rod 3 slides towards the tibia, the locking head 44 can slide along the inclined surface of the toothed block 31 without obstruction. When the positioning rod 3 has a tendency to slide in the opposite direction, the locking head 44 will be locked in the tooth groove of the toothed block 31 under the action of the first spring 42, restricting its reverse movement. This one-way locking structure ensures that the positioning rod 3 will not easily shift after being adjusted to the appropriate position, ensuring the stability of the positioning rod 3 during drilling.

[0043] In this embodiment, the locking component 6 includes a loading rod 61, a guide shaft 62, and a bolt 63. The inner wall of the sealing shaft 5 is connected to the loading rod 61. The guide shaft 62 is installed at one end of the loading rod 61 and located in the middle of the sealing shaft 5. The guide shaft 62 is sleeved on the positioning rod 3. The outer circumference of the sealing shaft 5 is threaded with a bolt 63 that passes through the guide shaft 62 and presses against the positioning rod 3. When the sealing shaft 5 is adjusted to a suitable position, that is, when the flexible seal 7 fits well with the leg drilling part, the bolt 63 is rotated so that it passes through the guide shaft 62 and presses against the positioning rod 3. The sealing shaft 5 is fixed on the positioning rod 3 by the friction between the bolt 63 and the positioning rod 3.

[0044] In this embodiment, the flexible seal 7 includes a flexible sealing cover 71 and a ring 72. One end of the sealing shaft 5 is connected to the ring 72 through the flexible sealing cover 71. A fluid guiding channel is formed inside the flexible sealing cover 71, which communicates with the inside of the sealing shaft 5. The end of the ring 72 away from the flexible sealing cover 71 is connected to a rubber ring 73 for fitting with the leg drilling position. The flexible sealing cover 71 is flexible and can adjust its shape as the sealing shaft 5 moves. The fluid guiding channel inside it allows the blood generated during drilling to flow smoothly into the sealing shaft 5 and then be discharged through the guide member 8. In actual use, when the sealing shaft 5 moves to the front end of the drilling position, the rubber ring 73 on the ring 72 can fit tightly with the leg drilling position, forming a sealed environment around it to prevent blood from overflowing from the fitting area and avoid excessive pressure damage to the leg skin. The blood generated during drilling can enter the sealing shaft 5 through the guide channel opened in the flexible sealing cover 71 and then be discharged through the guide member 8.

[0045] In this embodiment, the flow guide 8 includes a flow guide tube 81 and a valve body 82. The bottom side of the outer periphery of the sealing shaft 5 is connected to the flow guide tube 81, which communicates with its interior. The valve body 82 is installed on the flow guide tube 81. The end of the flow guide tube 81 away from the sealing shaft 5 is connected to a suction pump. When flow is not needed, the valve body 82 is closed to prevent external contaminants from entering the sealing shaft 5. When flow is needed, the valve body 82 is opened, and the suction pump works to generate negative pressure, drawing out the blood collected in the sealing shaft 5 through the flow guide tube 81. This structure can promptly discharge the blood generated during drilling, preventing blood from accumulating and overflowing in the sealing shaft 5, maintaining a clear surgical field, reducing the difficulty of surgical operations, and improving surgical efficiency and safety.

[0046] In this embodiment, the sterilization injection component 9 includes an injection cylinder 91 and an elastic piston part 92. The injection cylinder 91 is installed on the outer periphery of the sealing shaft 5 and arranged laterally. One end of the injection cylinder 91 is connected to an injection pipe 911, which extends through the outer periphery of the ring body 72 and into it. A one-way valve 912 is installed on the injection pipe 911. The injection cylinder 91 is filled with sterilization liquid. The elastic piston part 92 is installed inside the injection cylinder 91 and is used to push the sterilization liquid into the ring body 72 along the injection pipe 911 when force is applied. When sterilization is required at the drilled part... During sterilization, pressing the elastic piston 92 moves it within the injection cylinder 91, generating pressure on the sterilizing solution and pushing it towards the injection tube 911. The one-way valve 912 prevents the sterilizing solution from flowing back into the injection cylinder 91, ensuring that the sterilizing solution is smoothly delivered through the injection tube 911 to the ring 72 and then diffuses to the drilling site. This design allows for timely sterilization of the drilling site before or during drilling. Combined with the sealing effect of the flexible seal 7, it reduces the invasion of external bacteria, lowers the risk of postoperative infection, and ensures the patient's postoperative recovery.

[0047] In this embodiment, the elastic piston part 92 includes a piston body 921, a push rod 922 and a second spring 923. The piston body 921 is slidably disposed in the injection cylinder 91. The push rod 922 is connected to the side of the piston body 921 and slides through the other end of the injection cylinder 91. The second spring 923 located in the injection cylinder 91 is sleeved on the push rod 922, and the two ends of the second spring 923 are respectively connected to the piston body 921 and the inner wall of the other end of the injection cylinder 91. An air hole 913 is opened at the other end of the injection cylinder 91, and the air hole 913 is used for the piston body 921 to slide smoothly in the injection cylinder 91. Pushing the push rod 922 causes the piston body 921 to slide inside the injection cylinder 91, squeezing the sterilizing liquid inside the injection cylinder 91 and delivering it through the injection tube 911. The second spring 923 is compressed when the piston body 921 slides, storing elastic potential energy. When the push rod 922 is released, the second spring 923 releases its elastic potential energy, pushing the piston body 921 and the push rod 922 back to their original positions, facilitating the next injection operation. The air hole 913 can balance the air pressure on the other side of the piston body 921 inside the injection cylinder 91, preventing the piston body 921 from being obstructed due to air pressure difference, and ensuring that the piston body 921 slides smoothly inside the injection cylinder 91.

[0048] In this embodiment, a liquid inlet is installed at one end of the injection cylinder 91 for injecting the disinfectant solution into the injection cylinder 91. The liquid inlet includes an inlet shaft 93, which is connected to the outer periphery of one end of the injection cylinder 91 and communicates with its interior. A sealing plug 931 is inserted into the inlet shaft 93. When it is necessary to replenish the disinfectant solution, the sealing plug 931 is pulled out, the tip of the syringe is inserted into the inlet shaft 93 to inject the disinfectant solution into the injection cylinder 91, and after replenishment, the sealing plug 931 is inserted back into the inlet shaft 93 to seal the inlet shaft 93.

[0049] In specific embodiments, it should be noted that the above-mentioned bactericidal solution can be either povidone-iodine solution or physiological saline.

[0050] The specific working principle of this invention is as follows:

[0051] During tibial drilling surgery for posterior cruciate ligament repair, the positioning curette 2 is operated first. The handle 21 is held and the slider 24 is slid in the arc groove of the arc slide rail 102. The position of the curette rod 22 is adjusted and inserted into the body through the incision from the back of the leg. After finding the positioning point on the back of the tibia, the locking screw 23 at the other end of the handle 21 is rotated to press it against the arc groove on the outside of the arc slide rail 102 to fix the positioning curette 2. Then the positioning rod 3 is adjusted so that it slides in the guide hole of the guide handle 103. At this time, in the locking component 4, the first spring 42 pushes the locking head 44 on the locking pin 43 to cooperate with the tooth block 31 of the positioning rod 3, allowing the positioning rod 3 to slide unidirectionally towards the tibia until the end of the positioning rod 3 is close to the positioning position of the front end of the tibia.

[0052] Subsequently, the sealing shaft 5, which is slidably sleeved on the positioning rod 3, makes the rubber ring 73 of the ring body 72 in the flexible sealing member 7 at one end of the sealing shaft 5 fit with the drilled hole position of the leg. The flexible sealing cover 71 adjusts its shape accordingly to form a seal. Through the locking member 6 on the sealing shaft 5, the rotating bolt 63 passes through the guide shaft 62 to press the positioning rod 3, fixing the position of the sealing shaft 5. The guide shaft 62 is installed on the inner wall of the sealing shaft 5 through the loading rod 61 to ensure that the sealing shaft 5 slides smoothly.

[0053] Then, operate the sterilization injection component 9, push the push rod 922 of the elastic piston part 92, drive the piston body 921 to slide in the injection cylinder 91, squeeze the sterilization liquid, and the sterilization liquid is transported to the ring body 72 through the injection tube 911, so that the sterilization liquid diffuses at the front end of the drill hole and sterilizes the drill hole. The second spring 923 is compressed, and the push rod 922 is released and reset. If the sterilization liquid is insufficient, pull out the sealing plug 931 of the liquid inlet shaft 93 and replenish the sterilization liquid through the liquid inlet shaft 93. The vent 913 ensures that the piston body 921 slides smoothly.

[0054] The bone drill is then passed through the drilling channel opened in the positioning rod 3 to perform drilling operations. During the drilling process, the valve body 82 on the guide tube 81 is opened, and the aspiration pump draws out the blood collected in the sealing shaft 5 through the guide tube 81 to maintain a clear surgical field and ensure that the operation can proceed smoothly.

[0055] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A tibial drilling guide for posterior cruciate ligament repair, characterized in that, It includes a positioning frame (1), a positioning scraper (2), and a positioning rod (3); The positioning frame (1) includes an arc-shaped handle (101), with an arc-shaped slide rail (102) and a guide handle (103) respectively installed at both ends of the arc-shaped handle (101). The positioning scraper (2) cooperates with the arc-shaped slide rail (102) and its position on the arc-shaped slide rail (102) is adjustable. A through guide hole is opened in the guide handle (103). The positioning rod (3) slides through the guide hole. A drilling channel for the bone drill to pass through is opened in the positioning rod (3). A locking fastener (4) is installed on the guide handle (103) to restrict the one-way sliding of the positioning rod (3). The end of the positioning rod (3) is fitted with a sealing shaft (5), and a self-locking locking element (6) is installed on the sealing shaft (5). One end of the sealing shaft (5) is connected to a flexible sealing element (7) fitted on the positioning rod (3), and a flow guide element (8) for guiding liquid flow is connected to the outer periphery of the sealing shaft (5). The sealing shaft (5) is equipped with a sterilization injection component (9) that delivers the sterilization liquid into the flexible seal (7). The locking element (4) includes a threaded head (41), a first spring (42) and a locking pin (43). A toothed block (31) is integrally formed on the positioning rod (3) along its length direction. A threaded hole communicating with the guide hole is opened on the outer side of the guide handle (103). The threaded head (41) is threadedly connected in the threaded hole. One end of the threaded head (41) is connected to the locking pin (43) facing the positioning rod (3) through the first spring (42). The locking pin (43) is connected to a locking head (44) at the end near the positioning rod (3). The locking head (44) cooperates with the toothed block (31) to restrict the positioning rod (3) from sliding unidirectionally in the guide hole of the guide handle (103). The locking component (6) includes a loading rod (61), a guide shaft (62), and a bolt (63). The inner wall of the sealing shaft (5) is connected to the loading rod (61). The guide shaft (62) is installed at one end of the loading rod (61) and located in the middle of the sealing shaft (5). The guide shaft (62) is sleeved on the positioning rod (3). The outer circumference of the sealing shaft (5) is threaded with a bolt (63) that passes through the guide shaft (62) and presses against the positioning rod (3).

2. The tibial drilling guide for posterior cruciate ligament repair according to claim 1, characterized in that, The positioning scraper (2) includes a handle (21), which is slidably mounted on an arc-shaped slide rail (102). An arc-shaped groove is provided in the arc-shaped slide rail (102). A slider (24) that slides with the arc-shaped groove is installed on the handle (21). An arc-shaped groove is integrally formed on the outer side of the arc-shaped slide rail (102). One end of the handle (21) is connected to a scraper rod (22) for positioning the posterior side of the tibia. The other end of the handle (21) is threaded with a locking screw (23) that presses against the arc-shaped groove on the outer side of the arc-shaped slide rail (102).

3. The tibial drilling guide for posterior cruciate ligament repair according to claim 1, characterized in that, The flexible seal (7) includes a flexible sealing cover (71) and a ring (72). One end of the sealing shaft (5) is connected to the ring (72) through the flexible sealing cover (71). A liquid guiding channel is formed inside the flexible sealing cover (71) and communicates with the inside of the sealing shaft (5). The end of the ring (72) away from the flexible sealing cover (71) is connected to a rubber ring (73) for fitting with the leg drilling position.

4. The tibial drilling guide for posterior cruciate ligament repair according to claim 3, characterized in that, The flow guide (8) includes a flow guide pipe (81) and a valve body (82). The bottom side of the outer periphery of the sealing shaft (5) is connected to the flow guide pipe (81) which communicates with its interior. The valve body (82) is installed on the flow guide pipe (81). The end of the flow guide pipe (81) away from the sealing shaft (5) is connected to a liquid pump.

5. The tibial drilling guide for posterior cruciate ligament repair according to claim 3, characterized in that, The sterilization injection component (9) includes an injection cylinder (91) and an elastic piston part (92). The injection cylinder (91) is installed on the outer periphery of the sealing shaft (5) and arranged laterally. One end of the injection cylinder (91) is connected to an injection tube (911), and the injection tube (911) extends through the outer periphery of the ring body (72) into it. A one-way valve (912) is installed on the injection tube (911). The injection cylinder (91) is filled with sterilization liquid. The elastic piston part (92) is installed in the injection cylinder (91) and is used to push the sterilization liquid along the injection tube (911) into the ring body (72) when force is applied.

6. The tibial drilling guide for posterior cruciate ligament repair according to claim 5, characterized in that, The elastic piston part (92) includes a piston body (921), a push rod (922) and a second spring (923). The piston body (921) is slidably disposed inside the injection cylinder (91). The side of the piston body (921) is connected to the push rod (922), and the push rod (922) slides through the other end of the injection cylinder (91). The push rod (922) is sleeved with the second spring (923) located inside the injection cylinder (91), and the two ends of the second spring (923) are respectively connected to the piston body (921) and the inner wall of the other end of the injection cylinder (91). The other end of the injection cylinder (91) is provided with an air hole (913), and the air hole (913) is used for the piston body (921) to slide smoothly inside the injection cylinder (91).

7. The tibial drilling guide for posterior cruciate ligament repair according to claim 6, characterized in that, One end of the injection cylinder (91) is equipped with an inlet for injecting the bactericidal liquid into the injection cylinder (91).

8. The tibial drilling guide for posterior cruciate ligament repair according to claim 7, characterized in that, The liquid inlet section includes a liquid inlet shaft (93), and one end of the liquid injection cylinder (91) is connected to the liquid inlet shaft (93) which communicates with its interior. A sealing plug (931) is inserted into the liquid inlet shaft (93).

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