Tibia drilling guider for posterior cruciate ligament repair

Abstract

The invention relates to the technical field of medical instruments, and discloses a posterior cruciate ligament repair tibia drilling guider which comprises a positioning frame, a positioning curet and a positioning rod. The positioning frame comprises an arc-shaped handle, an arc-shaped sliding rail and a guide handle are installed at the two ends of the arc-shaped handle respectively, the positioning curette is matched with the arc-shaped sliding rail, the position of the positioning curette on the arc-shaped sliding rail is adjustable, a through guide hole is formed in the guide handle, the positioning rod penetrates through the guide hole in a sliding mode, and a drilling channel for a bone drill to penetrate through is formed in the positioning rod. The guide handle is provided with a locking fastener for limiting one-way sliding of the positioning rod; and the end part of the positioning rod is sleeved with a sealing shaft. The positioning curette is inserted from a rear side incision, slides along the guide handle and is locked to complete tibia positioning, before drilling, the sealing shaft slides to form an annular sealing structure, blood is prevented from interfering with the surgical field, during drilling, sterilization liquid can be conveyed to the drilling position through the elastic piston part, sterilization is achieved, the influence of the external environment is reduced, and the operation efficiency is improved. The postoperative infection risk is reduced, and the operation quality and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a posterior cruciate ligament repair tibial drilling guide. BACKGROUND

[0002] In daily life, ordinary people are prone to ligament sprains when they suddenly increase the intensity and amplitude of activities of various parts of the body during intense exercise. When people make actions that exceed the normal range of joint activities, the posterior cruciate ligament of the knee joint is easily torn or even completely ruptured due to excessive passive traction. This condition is often accompanied by other injuries such as sprains and fractures of the knee joint. After ligament injury, timely and accurate diagnosis, treatment and repair are necessary to prevent further damage and promote recovery. The posterior cruciate ligament repair tibial drilling guide is an indispensable surgical instrument in the posterior cruciate ligament repair surgery. During the posterior cruciate ligament repair surgery, the method of inserting and positioning the drill hole from the front to the back is usually used to complete the surgical operation.

[0003] The tibial drilling guide is generally connected with a positioning spatula and a positioning rod at both ends of the positioning frame. A through insertion channel is formed in the positioning rod for the bone drill to pass through. In actual operation, the positioning spatula is inserted into the body through an incision at the back side to locate the posterior tibia. After the spatula positioning is completed, the positioning frame and the positioning rod are assembled to locate the anterior tibial positioning position. Then, the positioning rod is pushed forward to contact and position the tibia. At this time, the positioning at both ends is completed. Then, the required angle is adjusted, the locking rod is locked, and the drilling can be performed.

[0004] During the tibial drilling process, the bone drill is first drilled into a certain depth at the anterior end of the tibia, and then the positioning rod is inserted into the drill hole for subsequent surgical operation. However, an open wound is formed during the drilling operation, which is easily infected by bacteria, increasing the risk of postoperative infection. In addition, during the drilling process, a large amount of blood flows down along the leg due to the damage of local blood vessels, thereby interfering with the surgical field and increasing the difficulty of the operation.

[0005] To solve the above problems, the posterior cruciate ligament repair tibial drilling guide is proposed in the present application. SUMMARY

[0006] The posterior cruciate ligament repair tibial drilling guide is proposed in the present application, which solves the problem that in the related art, the bone drill is first drilled into a certain depth, and then the positioning rod is inserted, but the drilling forms an open wound, which is easily infected by bacteria, increasing the risk of postoperative infection. At the same time, the local blood vessels are damaged, causing blood to flow down along the leg, interfering with the surgical field, and increasing the difficulty of the operation.

[0007] The posterior cruciate ligament repair tibial drilling guide proposed in the present application includes a positioning frame, a positioning spatula and a positioning rod.

[0008] 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 in the guide hole, a drill hole channel is formed in the positioning rod for the bone drill to pass through, and a lock piece is arranged on the guide handle to limit the one-way sliding of the positioning rod.

[0009] An end of the positioning rod is provided with a sealing shaft, a self-locking locking piece is arranged on the sealing shaft, one end of the sealing shaft is connected with a flexible sealing piece arranged on the positioning rod, and a liquid guiding piece is connected to the outer periphery of the sealing shaft.

[0010] The sealing shaft is provided with a sterilization liquid injection piece for injecting sterilization liquid into the flexible sealing piece.

[0011] As a further optimization scheme of the present application, the positioning spatula comprises a handle, the handle is slidably arranged on the arc-shaped sliding rail, an arc-shaped sliding groove is formed in the arc-shaped sliding rail, a sliding block is arranged on the handle and slidably matched with the arc-shaped sliding groove, an arc-shaped groove is integrally formed on the outer side of the arc-shaped sliding rail, one end of the handle is connected with a spatula rod for positioning the rear side of the tibia, and the other end of the handle is threadedly connected with a locking screw rod for pressing the arc-shaped groove on the outer side of the arc-shaped sliding rail.

[0012] As a further optimization scheme of the present application, the lock piece comprises a threaded head, a first spring and a lock column, the positioning rod is integrally formed with a tooth block along the length direction of the positioning rod, a threaded hole is formed in the outer side of the guide handle and communicated with the guide hole, the threaded head is threadedly connected in the threaded hole, one end of the threaded head is connected with the lock column arranged towards the positioning rod through the first spring, one end of the lock column close to the positioning rod is connected with a lock head, and the lock head is matched with the tooth block to limit the one-way sliding of the positioning rod in the guide hole of the guide handle.

[0013] As a further optimization scheme of the present application, the locking piece comprises a loading rod, a guide shaft and a bolt, the inner wall of the sealing shaft is connected with the loading rod, the guide shaft is arranged at one end of the loading rod and located at the middle position in the sealing shaft, the guide shaft is arranged on the positioning rod, and the outer periphery of the sealing shaft is threadedly connected with the bolt for pressing the positioning rod through the guide shaft.

[0014] As a further optimization scheme of the present application, the flexible sealing piece comprises a flexible sealing cover and a ring body, one end of the sealing shaft is connected with the ring body through the flexible sealing cover, a liquid guiding channel is formed in the flexible sealing cover and communicated with the sealing shaft, and one end of the ring body away from the flexible sealing cover is connected with a rubber ring for abutting with the leg drilling position.

[0015] As a further optimization scheme of the present application, the flow guide piece comprises a flow guide pipe and a valve body, the bottom side of the outer periphery of the sealing shaft is connected with the flow guide pipe in communication with the inside thereof, and the flow guide pipe is provided with the valve body, and the end of the flow guide pipe away from the sealing shaft is connected with the liquid pumping pump.

[0016] As a further optimization scheme of the present application, the sterilization liquid injection piece comprises a liquid injection cylinder and an elastic piston part, the liquid injection cylinder is installed on the outer periphery of the sealing shaft and arranged transversely, one end of the liquid injection cylinder is connected with a liquid injection pipe, the liquid injection pipe extends to the inside of the ring body through the outer periphery of the ring body, a one-way valve is installed on the liquid injection pipe, the liquid injection cylinder is filled with sterilization liquid, and the elastic piston part is installed in the liquid injection cylinder and used for pushing the sterilization liquid along the liquid injection pipe into the ring body when force is applied.

[0017] As a further optimization scheme of the present application, the elastic piston part comprises a piston body, a push rod and a second spring, the piston body is slidingly arranged in the liquid injection cylinder, the side surface of the piston body is connected with the push rod, the push rod slidingly passes through the other end of the liquid injection cylinder, the push rod is sleeved with the second spring located in the liquid injection cylinder, and the two ends of the second spring are respectively connected with the piston body and the inner wall of the other end of the liquid injection cylinder, and the other end of the liquid injection cylinder is provided with an air hole for smooth sliding of the piston body in the liquid injection cylinder.

[0018] As a further optimization scheme of the present application, one end of the liquid injection cylinder is provided with a liquid inlet part for injecting the sterilization liquid into the liquid injection cylinder.

[0019] As a further optimization scheme of the present application, the liquid inlet part comprises a liquid inlet shaft, the outer periphery of one end of the liquid injection cylinder is connected with the liquid inlet shaft in communication with the inside thereof, and the liquid inlet shaft is inserted with a sealing plug.

[0020] The above technical scheme of the present application has the following beneficial technical effects:

[0021] 1. In the posterior cruciate ligament repair surgery, the positioning drill hole is mostly inserted from the front side to the back side, and there is a visual obstruction under the arthroscopic surgery, so the positioning is often determined by the scale, which not only increases the operation time, but also increases the cost of the patient. When the present application is used, the spatula rod of the positioning spatula is inserted into the body from the leg rear incision, the tibia rear side is positioned, the positioning rod slides along the guide handle of the positioning frame, the one-way sliding is limited by the lock buckle, and the end portion is pressed against the front end of the tibia to complete the initial positioning; then, the slider on the handle slides along the arc-shaped sliding rail of the positioning frame, is adjusted to the required angle, the locking screw is tightened to fix the position, and the final positioning is completed; then, the drill bit passes through the drill hole channel in the positioning rod to drill the tibia. The above design enables the guide to be inserted into the human body without assembling parts, the two ends of the pre-drilled hole can be positioned respectively, and the positioning frame also forms a sighting device, so that the bone tunnel is accurate, the quality of the operation is improved, and the operation is intuitive and accurate under the arthroscopic surgery.

[0022] 2. The application can slide the sealing shaft on the positioning rod after positioning the positioning spatula and the positioning rod, make the flexible sealing piece on the sealing shaft abut against the leg drilling site, the flexible sealing piece is switched from the unfolded posture to the folded posture, the annular sealing structure is formed around the drilling site, then the position of the sealing shaft on the positioning rod is fixed through the locking piece, the blood generated during drilling can enter the sealing shaft along the flexible sealing piece, then can be discharged in time through the flow guide piece, which effectively avoids the situation that the blood flows down along the leg and interferes with the surgical field, makes the surgical field more clear, reduces the difficulty of operation, improves the safety and efficiency of operation;

[0023] 3. After the flexible sealing piece on the sealing shaft abuts against the leg drilling site, the elastic piston part on the sterilization liquid injection part can be pushed to make part of the sterilization liquid in the elastic piston part flow into the flexible sealing piece, the sterilization liquid flows in the front end part of the leg drilling site, can play a sterilization role, and the sterilization liquid and the flexible sealing piece cooperate with the sealing of the drilling site, can further reduce the influence of the external environment on the drilling site, reduces the risk of postoperative infection, and protects the postoperative rehabilitation of the patient. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The overall structure diagram of the posterior cruciate ligament repair tibial drilling guide is provided for the application;

[0025] Figure 2 The cooperation structure diagram of the positioning frame, the positioning spatula and the positioning rod is provided for the application;

[0026] Figure 3 The back structure diagram of the application is provided for the application; Figure 2 The back structure diagram of the application is provided for the application;

[0027] Figure 4 The cooperation structure diagram of the positioning rod and the lock piece is provided for the application;

[0028] Figure 5 The cooperation structure diagram of the positioning rod and the sealing shaft is provided for the application;

[0029] Figure 6 The internal section view of the sealing shaft is provided for the application;

[0030] Figure 7 The structure diagram of the flexible sealing piece is provided for the application;

[0031] Figure 8 The structure diagram of the sterilization liquid injection part is provided for the application;

[0032] Figure 9 The internal section view of the liquid injection cylinder is provided for the application.

[0033] Fig. 1 is a positioning frame; 101 is an arc-shaped handle; 102 is an arc-shaped sliding rail; 103 is a guide handle; 2 is a positioning spatula; 21 is a handle; 22 is a spatula rod; 23 is a locking screw; 24 is a sliding block; 3 is a positioning rod; 31 is a tooth block; 4 is a lock catch; 41 is a threaded head; 42 is a first spring; 43 is a lock post; 44 is a lock catch head; 5 is a sealing shaft; 6 is a locking piece; 61 is a loading rod; 62 is a guide shaft; 63 is a bolt; 7 is a flexible sealing piece; 71 is a flexible sealing cover; 72 is a ring body; 73 is a rubber ring; 8 is a flow guide piece; 81 is a flow guide pipe; 82 is a valve body; 9 is a sterilization liquid injection piece; 91 is a liquid injection cylinder; 911 is a liquid injection pipe; 912 is a one-way valve; 913 is an air hole; 92 is an elastic piston part; 921 is a piston body; 922 is a push rod; 923 is a second spring; 93 is a liquid inlet shaft; 931 is a sealing plug. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0035] As shown in the drawings, the present application provides a posterior cruciate ligament repair tibial drilling guide, which comprises a positioning frame 1, a positioning spatula 2 and a positioning rod 3. Figures 1-9 The positioning frame 1 comprises an arc-shaped handle 101, two ends of the arc-shaped handle 101 are respectively provided with an arc-shaped sliding rail 102 and a guide handle 103, the positioning spatula 2 is matched with the arc-shaped sliding rail 102 and is adjustable in position on the arc-shaped sliding rail 102, a through guide hole is formed in the guide handle 103, the positioning rod 3 is slidably arranged through the guide hole, a drilling channel for a bone drill is formed in the positioning rod 3, and the guide handle 103 is provided with a lock catch 4 for limiting the one-way sliding of the positioning rod 3.

[0036] The end of the positioning rod 3 is sleeved with a sealing shaft 5, the sealing shaft 5 is provided with a self-locking locking piece 6, one end of the sealing shaft 5 is connected with a flexible sealing piece 7 sleeved on the positioning rod 3, and the outer periphery of the sealing shaft 5 is connected with a flow guide piece 8 for guiding liquid.

[0037] The sealing shaft 5 is provided with a sterilization liquid injection piece 9 for delivering sterilization liquid into the flexible sealing piece 7.

[0038]

[0039] ​In use, the positioning spatula 2 invades the body through the incision on the back of the leg, finds the back of the tibia to achieve positioning, the positioning rod 3 slides on the guide handle 103 of the positioning frame 1, and is limited to slide in one direction by the locking piece 4, so that the end of the positioning rod 3 finds the front end of the tibia to achieve positioning, and the positioning is completed. Then the sliding block 24 on the handle 21 slides on the arc-shaped sliding rail 102 of the positioning frame 1, is adjusted to the required angle, and then the locking screw 23 is tightened to fix the position of the handle 21 on the arc-shaped sliding rail 102, and the final positioning is completed. The sealing shaft 5 slides on the positioning rod 3, so that the flexible sealing piece 7 on the sealing shaft 5 is in contact with the leg drilling position, and the flexible sealing piece 7 is switched from the unfolded posture to the folded posture to form a ring-shaped sealing structure around the drilling position. Then the position of the sealing shaft 5 on the positioning rod 3 is fixed by the locking piece 6. The elastic piston part 92 of the sterilization injection piece 9 is pushed to send part of the sterilization liquid in the elastic piston part 92 to the flexible sealing piece 7, so that the sterilization liquid flows in the front end of the leg drilling position to play a sterilization role. Then the drill bit passes through the drill hole channel in the positioning rod 3 to drill the tibia. The blood generated during drilling can enter the sealing shaft 5 along the flexible sealing piece 7, and then be discharged in time through the flow guide piece 8.

[0040] In the embodiment, the positioning spatula 2 comprises a handle 21, the handle 21 is slidably sleeved on the arc-shaped sliding rail 102, an arc-shaped sliding groove is formed in the arc-shaped sliding rail 102, a sliding block 24 is arranged on the handle 21 and slidably connected with the arc-shaped sliding groove, an arc-shaped recess is formed on the outer side of the arc-shaped sliding rail 102, one end of the handle 21 is connected with a spatula rod 22 for positioning the back of the tibia, and the other end of the handle 21 is threadedly connected with a locking screw 23 for pressing the arc-shaped recess on the outer side of the arc-shaped sliding rail 102. In use, the sliding block 24 on the handle 21 can slide on the arc-shaped sliding rail 102 to adjust the position of the spatula rod 22. The spatula rod 22 is used to deeply invades the body to find the positioning point on the back of the tibia to achieve positioning of the back end of the tibia. When the appropriate position is adjusted, the locking screw 23 is rotated to press the arc-shaped recess on the outer side of the arc-shaped sliding rail 102, so that the handle 21 is fixed on the arc-shaped sliding rail 102, and the positioning spatula 2 is prevented from moving during the operation. The position of the positioning spatula 2 can be flexibly adjusted to ensure accurate positioning of the back of the tibia.

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

[0042] In the embodiment, the locking piece 4 comprises a threaded head 41, a first spring 42 and a locking column 43, the positioning rod 3 is integrally formed with a tooth block 31 along the length direction thereof, the outer side of the guide handle 103 is provided with a threaded hole communicated with the guide hole, the threaded head 41 is threadedly connected in the threaded hole, one end of the threaded head 41 is connected with the locking column 43 arranged towards the positioning rod 3 through the first spring 42, the end of the locking column 43 close to the positioning rod 3 is connected with a locking head 44, and the locking head 44 cooperates with the tooth block 31 to limit the one-way sliding of the positioning rod 3 in the guide hole of the guide handle 103; the first spring 42 of the present application generates elastic force on the locking column 43, so that the locking head 44 on the locking column 43 always closely cooperates with the tooth 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 tooth block 31 without obstruction, and when the positioning rod 3 has reverse sliding trend, the locking head 44 will be clamped in the tooth groove of the tooth block 31 under the action of the first spring 42 to limit the reverse movement thereof, the one-way locking structure ensures that the positioning rod 3 will not be easily displaced after being adjusted to the appropriate position, and ensures the stability of the positioning rod 3 during the drilling process.

[0043] In the embodiment, the locking piece 6 comprises a loading rod 61, a guide shaft 62 and a bolt 63, the inner wall of the sealing shaft 5 is connected with the loading rod 61, the guide shaft 62 is installed at one end of the loading rod 61 and located at the middle position in the sealing shaft 5, and the guide shaft 62 is sleeved on the positioning rod 3, and the outer periphery of the sealing shaft 5 is threadedly connected with the bolt 63 which presses the positioning rod 3 through the guide shaft 62; when the sealing shaft 5 is adjusted to the appropriate position, i.e. the flexible sealing piece 7 closely cooperates with the leg drilling position, the bolt 63 is rotated to pass through the guide shaft 62 and press the positioning rod 3, and the sealing shaft 5 is fixed on the positioning rod 3 through the friction force between the bolt 63 and the positioning rod 3.

[0044] In the embodiment, the flexible sealing piece 7 comprises a flexible sealing cover 71 and a ring body 72, one end of the sealing shaft 5 is connected with the ring body 72 through the flexible sealing cover 71, the flexible sealing cover 71 is formed with a liquid guide channel communicated with the sealing shaft 5, and the end of the ring body 72 away from the flexible sealing cover 71 is connected with a rubber ring 73 used for closely cooperating with the leg drilling position; the flexible sealing cover 71 has flexibility and can adjust the shape with the movement of the sealing shaft 5, and the liquid guide channel in the flexible sealing cover 71 can make the blood generated in the drilling process flow into the sealing shaft 5 and then be discharged through the flow guide piece 8; in specific use, when the sealing shaft 5 moves to the front end of the drilling position, the rubber ring 73 on the ring body 72 closely cooperates with the leg drilling position to form a sealed environment around the rubber ring 73, so as to prevent the blood from overflowing from the cooperation position and avoid excessive compression damage to the skin of the leg, and the blood generated in the drilling process can enter the sealing shaft 5 through the liquid guide channel formed in the flexible sealing cover 71 and then be discharged through the flow guide piece 8.

[0045] In the embodiment, the flow guide 8 comprises a flow guide pipe 81 and a valve body 82, the flow guide pipe 81 is connected to the bottom side of the outer periphery of the sealing shaft 5 and communicates with the inside of the sealing shaft 5, and the valve body 82 is installed on the flow guide pipe 81, and the end of the flow guide pipe 81 away from the sealing shaft 5 is connected to a liquid suction pump; when the flow guide is not needed, the valve body 82 is closed to prevent external pollutants from entering the sealing shaft 5, and when the flow guide is needed, the valve body 82 is opened, and the liquid suction pump works to generate negative pressure, so that the blood collected in the sealing shaft 5 is sucked out through the flow guide pipe 81. The structure can timely discharge the blood generated by the drilling, avoid the accumulation and overflow of the blood in the sealing shaft 5, always keep the surgical field clear, reduce the difficulty of surgical operation, and improve the efficiency and safety of surgery.

[0046] In the embodiment, the sterilization and liquid injection member 9 comprises a liquid injection cylinder 91 and an elastic piston part 92, the liquid injection cylinder 91 is installed on the outer periphery of the sealing shaft 5 and arranged transversely, one end of the liquid injection cylinder 91 is connected to a liquid injection pipe 911, the liquid injection pipe 911 extends to the inside of the ring body 72 through the outer periphery of the ring body 72, a one-way valve 912 is installed on the liquid injection pipe 911, the liquid injection cylinder 91 is filled with sterilization liquid, and the elastic piston part 92 is installed in the liquid injection cylinder 91 and used to push the sterilization liquid along the liquid injection pipe 911 into the ring body 72 when forced; when it is needed to sterilize the drilling site, the elastic piston part 92 is pressed to move in the liquid injection cylinder 91, generate pressure on the sterilization liquid, push the sterilization liquid to the liquid injection pipe 911, the one-way valve 912 can prevent the sterilization liquid from flowing back into the liquid injection cylinder 91, ensure that the sterilization liquid is smoothly delivered into the ring body 72 through the liquid injection pipe 911, and then diffused to the drilling site. The design can timely sterilize the drilling site before or during drilling, combined with the sealing effect of the flexible sealing member 7, reduce the invasion of external bacteria, reduce the risk of postoperative infection, and protect the postoperative recovery of the patient.

[0047] In the embodiment, the elastic piston part 92 comprises a piston body 921, a push rod 922 and a second spring 923, the piston body 921 is slidingly arranged in the liquid injection cylinder 91, the side of the piston body 921 is connected with the push rod 922, the push rod 922 slidingly passes through the other end of the liquid injection cylinder 91, the second spring 923 is sleeved on the push rod 922 and located in the liquid injection cylinder 91, and the two ends of the second spring 923 are connected with the piston body 921 and the inner wall of the other end of the liquid injection cylinder 91 respectively, the other end of the liquid injection cylinder 91 is provided with an air hole 913, and the air hole 913 is used for smooth sliding of the piston body 921 in the liquid injection cylinder 91; the push rod 922 is pushed to drive the piston body 921 to slide in the liquid injection cylinder 91, and the sterilizing liquid in the liquid injection cylinder 91 is extruded to be delivered out through the liquid injection pipe 911; the second spring 923 is compressed when the piston body 921 slides, and stores elastic potential energy; when the push rod 922 is released, the second spring 923 releases the elastic potential energy to push the piston body 921 and the push rod 922 to reset, so that the next liquid injection operation is facilitated; the air hole 913 can balance the air pressure on the other side of the piston body 921 in the liquid injection cylinder 91, avoid the sliding of the piston body 921 being blocked due to the air pressure difference, and ensure that the piston body 921 slides smoothly in the liquid injection cylinder 91.

[0048] In the embodiment, one end of the liquid injection cylinder 91 is provided with a liquid inlet part for injecting the sterilizing liquid into the liquid injection cylinder 91; the liquid inlet part comprises a liquid inlet shaft 93, the outer periphery of one end of the liquid injection cylinder 91 is connected with the liquid inlet shaft 93 which is in communication with the inside of the liquid injection cylinder 91, and the liquid inlet shaft 93 is inserted with a sealing plug 931.

[0049] In specific embodiments, it should be noted that the sterilizing liquid can be selected from iodophor liquid or physiological saline.

[0050] The specific working principle of the application is as follows:

[0051] When the posterior cruciate ligament repair tibial drilling surgery is performed, first, the positioning spatula 2 is operated, the handle 21 is held, the sliding block 24 is made to slide in the arc-shaped sliding groove of the arc-shaped sliding rail 102, the spatula rod 22 position is adjusted, the spatula rod 22 is made to intrude into the body from the rear side of the leg through the incision, after the rear positioning point of the tibia is found, the locking screw 23 at the other end of the handle 21 is rotated to make it press the arc-shaped recess on the outer side of the arc-shaped sliding rail 102 and fix the positioning spatula 2, then the positioning rod 3 is adjusted to make it slide in the guide hole of the guide handle 103, at this time, in the locking member 4, the first spring 42 pushes the locking head 44 on the locking column 43 to cooperate with the tooth block 31 of the positioning rod 3 to allow the positioning rod 3 to slide in one direction to the tibia direction until the end of the positioning rod 3 approaches the front positioning position of the tibia;

[0052] Subsequently, the sealing shaft 5 is sleeved on the positioning rod 3, and the rubber ring 73 of the ring body 72 is attached to the leg hole position in the flexible sealing member 7 at one end of the sealing shaft 5, so that the flexible sealing cover 71 adjusts the shape to form a seal. The locking member 6 on the sealing shaft 5 is rotated, the threaded bolt 63 is pressed against the positioning rod 3 through the guide shaft 62, the position of the sealing shaft 5 is fixed, the guide shaft 62 is installed on the inner wall of the sealing shaft 5 through the loading rod 61, and the sliding of the sealing shaft 5 is ensured to be stable;

[0053] Then, the sterilization liquid injection member 9 is operated, the push rod 922 of the elastic piston part 92 is pushed, the piston body 921 is driven to slide in the liquid injection cylinder 91, the sterilization liquid is extruded, the sterilization liquid is delivered into the ring body 72 through the liquid injection pipe 911, the sterilization liquid is diffused at the front end of the drill hole, the drill hole part is sterilized, the second spring 923 is compressed, and the push rod 922 is reset after being released. If the sterilization liquid is insufficient, the sealing plug 931 of the liquid inlet shaft 93 is pulled out, the sterilization liquid is supplemented through the liquid inlet shaft 93, and the air hole 913 ensures that the piston body 921 slides smoothly.

[0054] Subsequently, the bone drill is inserted into the drill hole passage formed in the positioning rod 3 to perform drilling operation. In the drilling process, the valve body 82 on the flow guide pipe 81 is opened, the blood collected in the sealing shaft 5 is pumped out through the flow guide pipe 81 by the liquid pump, the surgical field is kept clear, and the operation is smoothly performed.

[0055] The above describes the embodiments of the present application, but the embodiments are not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the embodiments, which are all within the protection scope of the embodiments.

Claims

1. A posterior cruciate ligament repair tibial drill guide, characterized in that, Including positioning frame (1), positioning spatula (2) and positioning rod (3); The positioning frame (1) includes an arc-shaped handle (101), both ends of the arc-shaped handle (101) are respectively provided with an arc-shaped sliding rail (102) and a guide handle (103), the positioning spatula (2) is matched with the arc-shaped sliding rail (102) and is adjustable in position on the arc-shaped sliding rail (102), a through guide hole is formed in the guide handle (103), the positioning rod (3) is slidably arranged in the guide hole, a drill hole is formed in the positioning rod (3) for the bone drill to pass through, and a locking member (4) for limiting the one-way sliding of the positioning rod (3) is arranged on the guide handle (103). The end of the positioning rod (3) is sleeved with a sealing shaft (5), a self-locking locking member (6) is arranged on the sealing shaft (5), one end of the sealing shaft (5) is connected with a flexible sealing member (7) sleeved on the positioning rod (3), and a flow guide member (8) for guiding liquid flow is connected to the outer periphery of the sealing shaft (5). The sealing shaft (5) is provided with a sterilization liquid injection member (9) for conveying sterilization liquid into the flexible sealing member (7).

2. The posterior cruciate ligament repair tibial drill guide in accordance with claim 1, wherein, The positioning spatula (2) includes a handle (21), the handle (21) is slidably sleeved on the arc-shaped sliding rail (102), an arc-shaped sliding groove is formed in the arc-shaped sliding rail (102), a sliding block (24) is arranged on the handle (21) and slidably matched with the arc-shaped sliding groove, an arc-shaped groove is integrally formed on the outer side of the arc-shaped sliding rail (102), one end of the handle (21) is connected with a spatula rod (22) for positioning the posterior side of the tibia, and the other end of the handle (21) is threadedly connected with a locking screw (23) for pressing the arc-shaped groove on the outer side of the arc-shaped sliding rail (102).

3. The posterior cruciate ligament repair tibial drill guide in accordance with claim 1, wherein, The locking member (4) includes a threaded head (41), a first spring (42) and a locking column (43), a tooth block (31) is integrally formed on the positioning rod (3) along the length direction of the positioning rod (3), a threaded hole is formed in the outer side of the guide handle (103) and communicated with the guide hole, the threaded head (41) is threadedly connected in the threaded hole, one end of the threaded head (41) is connected with the locking column (43) arranged towards the positioning rod (3) through the first spring (42), one end of the locking column (43) close to the positioning rod (3) is connected with a locking head (44), and the locking head (44) is matched with the tooth block (31) to limit the one-way sliding of the positioning rod (3) in the guide hole of the guide handle (103).

4. The posterior cruciate ligament repair tibial drill guide in accordance with claim 1, wherein, The locking member (6) includes a loading rod (61), a guide shaft (62) and a bolt (63), the inner wall of the sealing shaft (5) is connected with the loading rod (61), the guide shaft (62) is arranged at one end of the loading rod (61) and located at the middle position in the sealing shaft (5), the guide shaft (62) is sleeved on the positioning rod (3), and the outer periphery of the sealing shaft (5) is threadedly connected with the bolt (63) penetrating through the guide shaft (62) to press the positioning rod (3).

5. The posterior cruciate ligament repair tibial drill guide in accordance with claim 1, wherein, The flexible seal (7) comprises a flexible seal cover (71) and a ring body (72), one end of the seal shaft (5) is connected with the ring body (72) through the flexible seal cover (71), a liquid guide channel is formed in the flexible seal cover (71) and communicates with the seal shaft (5), and the ring body (72) is connected with a rubber ring (73) for abutting with the leg hole position at one end away from the flexible seal cover (71).

6. The posterior cruciate ligament repair tibial drill guide in accordance with claim 5, wherein, The flow guide (8) comprises a flow guide pipe (81) and a valve body (82), the bottom side of the outer periphery of the seal shaft (5) is connected with the flow guide pipe (81) which communicates with the inside of the seal shaft (5), and the valve body (82) is installed on the flow guide pipe (81), and one end of the flow guide pipe (81) away from the seal shaft (5) is connected with a liquid pumping pump.

7. The posterior cruciate ligament repair tibial drill guide in accordance with claim 5, wherein, The sterilization liquid injection member (9) comprises a liquid injection cylinder (91) and an elastic piston part (92), the liquid injection cylinder (91) is installed on the outer periphery of the seal shaft (5) and is arranged transversely, one end of the liquid injection cylinder (91) is connected with a liquid injection pipe (911), the liquid injection pipe (911) extends to the inside of the ring body (72) through the outer periphery of the ring body (72), a one-way valve (912) is installed on the liquid injection pipe (911), the liquid injection cylinder (91) is filled with sterilization liquid, and the elastic piston part (92) is installed in the liquid injection cylinder (91) and is used for pushing the sterilization liquid along the liquid injection pipe (911) into the ring body (72) when being stressed.

8. The posterior cruciate ligament repair tibial drill guide in accordance with claim 7, wherein, The elastic piston part (92) comprises a piston body (921), a push rod (922) and a second spring (923), the piston body (921) is slidingly arranged in the liquid injection cylinder (91), the side surface of the piston body (921) is connected with the push rod (922), the push rod (922) slidingly passes through the other end of the liquid injection cylinder (91), the second spring (923) is sleeved on the push rod (922) and located in the liquid injection cylinder (91), and the two ends of the second spring (923) are respectively connected with the piston body (921) and the inner wall of the other end of the liquid injection cylinder (91), and the other end of the liquid injection cylinder (91) is provided with an air hole (913) for smooth sliding of the piston body (921) in the liquid injection cylinder (91).

9. The posterior cruciate ligament repair tibial drill guide in accordance with claim 8, wherein, One end of the liquid injection cylinder (91) is provided with a liquid inlet part for injecting sterilization liquid into the liquid injection cylinder (91).

10. The posterior cruciate ligament repair tibial drill guide in accordance with claim 9, wherein, The liquid inlet part comprises a liquid inlet shaft (93), one end of the outer periphery of the liquid injection cylinder (91) is connected with the liquid inlet shaft (93) which communicates with the inside of the liquid injection cylinder (91), and the liquid inlet shaft (93) is inserted with a sealing plug (931).

Images