An endovision system for joint surgery special drainage tube

Abstract

The present application relates to a kind of joint surgery special drainage tube cavity visual operation system, belong to medical drainage equipment field, including drainage tube, the far end of the drainage tube is provided with anti-clogging structure, anti-clogging structure provides external rigid support for drainage tube.The proximal end of drainage tube is provided with operating assembly, operating assembly includes drainage leading device, visual flushing suction device and suture shearing device.Normal drainage, by drainage leading device provides negative pressure drainage;When blood clot obstruction occurs, visual flushing suction device is inserted through drainage tube, and target flushing suction is completed by endoscope positioning;When suture is mistakenly entered into lumen, suture shearing device can release elastic shearing head, and suture is accurately cut off by annular blade and residual end is taken out.The present application effectively solves the problems that traditional drainage tube is prone to blockage, prone to clogging and difficult to handle after missewing, with low surgical risk, higher safety and convenience.

Description

Technical Field

[0001] This invention relates to the field of joint surgery drainage device technology, specifically to a visual operating system for a drainage tube specifically designed for joint surgery. Background Technology

[0002] Common joint surgeries, including joint replacement, arthroscopic surgery, osteotomy, and joint fusion, are highly invasive, difficult to immobilize, and generate significant active bleeding and discharge, requiring continuous drainage to accelerate healing and reduce complications. Clinically, traditional round, cross-shaped, or double-lumen drainage tubes are commonly used for drainage, but these have the following drawbacks: 1. Due to the large incision and significant bleeding, the blood is prone to clotting and blocking the drainage tube, leading to drainage failure, local hematoma, and infection risk.

[0003] 2. The drainage tube needs to be inserted before suturing. During the suturing process, the surgical needle may easily puncture the drainage tube, causing leakage, or sew the drainage tube closed. When the drainage tube is removed, it may tear the wound, causing secondary damage and bleeding. 3. After suturing, the drainage tube can easily become compressed and clamped due to the frequent movement of the joints and muscle compression. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a visual operating system for drainage tubes in joint surgery, so as to solve the technical problems of blockage, pressure clamping and inaccurate handling after mis-suture in traditional drainage tubes.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An intraluminal visual operating system for a drainage tube specifically designed for joint surgery includes a drainage tube for insertion into an incision for drainage; The distal end of the drainage tube is provided with an anti-pinch structure, and the proximal end of the drainage tube is provided with an operating component; The operating components include a drainage and discharge device, a visual flushing and suction device, and a suture cutting device inside the drainage lumen. The drainage device is detachably connected to the proximal end of the drainage tube via a connecting component; Alternatively, the drainage outlet device is disconnected from the connecting assembly, and one of the visual flushing and suction device and the suture cutting device inside the drainage tube is inserted into the lumen of the drainage tube through the internal channel of the connecting assembly and reaches the distal end of the drainage tube.

[0006] The beneficial effects of this invention are as follows: Based on normal drainage of the drainage tube, by using three operation components that can be intervened through the same drainage tube—drainage export, visual flushing and suction, and intracavitary suture cutting—it is possible to achieve visual and precise treatment of problems such as blockage in the lumen, external pressure clamping, and mis-sutured sutures while keeping the drainage tube in place. This effectively solves the technical problems of not being able to accurately handle blockage, pressure clamping, and mis-sutured sutures in traditional drainage tubes, significantly reduces the risk of secondary surgery and tissue damage during tube removal, and effectively improves the safety and convenience of postoperative joint drainage.

[0007] Furthermore, the anti-pinch structure is a drainage tube support tube, which is a rigid sleeve that is fitted onto the outer wall of the drainage tube from the proximal end and slides to the distal end of the drainage tube.

[0008] The beneficial effects of adopting the above-mentioned further solution are as follows: by fitting a rigid sheath-shaped drainage tube support tube onto the outer wall of the drainage tube and sliding it to its distal end, rigid support can be provided to the distal end of the drainage tube from the outside and the drainage tube can be isolated from the muscle tissue, effectively preventing passive clamping of the lumen caused by joint movement or muscle compression, while not occupying the internal space of the drainage tube and ensuring smooth drainage; in addition, the wall of the drainage tube support tube is inserted between the drainage tube and the muscle tissue by compression during the sliding process, ensuring that the outer wall of the drainage tube support tube is tightly wrapped by the surrounding muscle tissue, making it difficult to slip out, and no additional incision or puncture is required, minimizing surgical trauma.

[0009] Furthermore, the distal end of the drainage tube support tube has a blunt or rounded head structure.

[0010] The advantages of adopting the above-mentioned further solutions are: the blunt or round head structure can prevent the support tube from scratching or puncturing the surrounding tissue during the advancement process, reduce the risk of iatrogenic injury, and improve operational safety.

[0011] Furthermore, the drainage device includes a negative pressure bulb and a drainage bag. The inlet tube of the negative pressure bulb is detachably connected to the connection assembly of the drainage tube, and the outlet tube of the negative pressure bulb is connected to the inlet of the drainage bag.

[0012] Preferably, the connecting component is a standard Luer connector or a snap-fit ​​quick connector.

[0013] The advantages of adopting the above-mentioned further solution are: the connection between the negative pressure ball and the drainage tube is detachable through the connecting component, which facilitates the rapid establishment of negative pressure drainage when the drainage is normal and smooth, and allows for quick disconnection and switching when other operating components need to be connected. The operation is simple and the sealing is reliable.

[0014] Furthermore, the visual flushing and suction device includes a visual flushing and suction tube, an endoscope, a flushing head, and a negative pressure suction head; The visible flushing and suction tube is a dual-lumen tube, the inner lumen of which includes a flushing chamber and a suction chamber; The endoscope is embedded at the distal end of the visual irrigation and suction tube and is located between the irrigation chamber and the suction chamber. The irrigation head and the negative pressure suction head are both located at the distal end of the visual irrigation and suction tube and are respectively connected to the irrigation chamber and the suction chamber. The distal end of the visual flushing suction tube is used to be inserted into the inner cavity of the drainage tube through the internal channel of the connecting assembly and reach the distal end of the drainage tube, while its proximal end is connected to the flushing pump and the negative pressure suction pump, respectively.

[0015] The beneficial effects of adopting the above-mentioned further solution are: integrating the endoscope, irrigation head and negative pressure suction head into the distal end of the dual-lumen irrigation and suction tube, it is possible to observe the location of the blockage in the drainage tube lumen in real time, and to use the irrigation chamber and suction chamber to complete targeted irrigation and blood clot aspiration respectively, so as to achieve precise clearing of the blockage and avoid damage to the tube wall or tissue caused by blind operation.

[0016] Furthermore, the suture cutting device inside the drainage tube includes a delivery tube, a guide wire, and an elastic shearing head housed in a compressed state within the inner cavity of the delivery tube; The outer diameter of the delivery tube is smaller than the inner diameter of the drainage tube, and its distal end is used to be inserted into the inner cavity of the drainage tube through the internal channel of the connecting assembly and reach the distal end of the drainage tube. The distal end of the guidewire is fixedly connected to the elastic shear head, and its proximal end extends to the proximal end of the delivery tube.

[0017] Preferably, an endoscope can be fixed at the distal end of the guidewire.

[0018] The beneficial effects of adopting the above-mentioned further solution are as follows: the elastic shear head is delivered into the drainage tube in a compressed state through the delivery tube, and the endoscope fixed at the distal end of the guide wire can realize real-time visual guidance of the shearing operation, ensuring that the elastic shear head accurately reaches the mis-sutured position. The delivery tube is withdrawn until the elastic shear head separates from it and opens, and then the guide wire is pulled back, so that the elastic shear head moves synchronously with the guide wire until it contacts the suture and cuts it. This completely solves the problem of wound tearing or secondary bleeding caused by sutures during the drainage tube removal process.

[0019] Furthermore, the distal outer edge of the elastic shear head is provided with an annular blade, which is made of nickel-titanium alloy and its cutting edge faces the proximal end of the elastic shear head.

[0020] The advantages of adopting the above-mentioned further solution are as follows: the annular blade made of nickel-titanium alloy has good elasticity and shape memory characteristics, and after expansion, it can fit tightly to the inner wall of the drainage tube in a circumferential direction; its cutting edge faces the proximal end, and a single cutting action can cover the sutures around the entire circumference of the drainage tube, eliminating the need for secondary operations and significantly improving clearance efficiency and operational safety. When pulling back the guide wire, the annular blade precisely cuts the sutures and brings out the cut suture fragments along with it, avoiding suture residue that could cause infection or re-blockage.

[0021] Furthermore, the nickel-titanium alloy exhibits excellent biocompatibility and corrosion resistance, ensuring the long-term safety and stability of the device within the body. This design enables truly minimally invasive, precise, and seamless unblocking and shearing procedures.

[0022] Furthermore, the elastic shear head is a conical funnel shape, with its distal diameter being larger than its proximal diameter, and its proximal diameter being smaller than the inner diameter of the delivery tube and fixedly connected to the guide wire.

[0023] The beneficial effects of adopting the above-mentioned further solution are as follows: When the conical funnel-shaped elastic shear head opens, its distal diameter is larger than its proximal diameter, allowing it to stably conform to the inner wall of the drainage tube, thus effectively cutting the suture. The proximal end is fixedly connected to the guidewire, facilitating precise control of release and retrieval. The funnel-shaped structure significantly reduces its contact area with the inner wall of the tube, minimizing frictional resistance. Furthermore, the proximal diameter of the elastic shear head is smaller than the inner diameter of the delivery tube, allowing it to be smoothly pulled back and recompressed within the delivery tube after suture cutting, facilitating reliable device retrieval and further improving operational safety and controllability.

[0024] Furthermore, the elastic shear head is a mesh structure woven from nickel-titanium alloy wire.

[0025] The beneficial effects of adopting the above-mentioned further solution are: the mesh structure woven from nickel-titanium alloy wire gives the elastic shear head both good radial support and axial flexibility, enabling it to pass smoothly through the curved section of the drainage tube when compressed, and when opened, its distal end makes uniform contact with the wall of the drainage tube, ensuring that the annular blade can cut the suture line without dead angles around the entire circumference.

[0026] Furthermore, the annular blade is composed of multiple continuous V-shaped or S-shaped units connected end to end, and the distal end of the annular blade is flush with the distal end of the elastic shear head and is fixedly connected to the elastic shear head.

[0027] The beneficial effects of adopting the above-mentioned further solution are as follows: The annular blade, composed of multiple V-shaped or S-shaped units connected end to end, has its distal end flush with and fixedly connected to the distal end of the elastic shear head, forming a continuous and uniform cutting edge. When the shear head retracts, it can achieve a complete and precise annular cut to any sutures that have accidentally entered the lumen, avoiding residue or repeated operations. Simultaneously, the annular structure formed by multiple V-shaped or S-shaped units connected end to end also endows the annular blade with excellent radial deformation capability, allowing it to adapt to different tube diameters as the elastic shear head expands radially, ensuring stable fit and efficient cutting in various drainage tubes. Furthermore, this structure can uniformly contract during compression, facilitating insertion through the delivery tube, and quickly returns to its predetermined shape after release, significantly improving the operational reliability and clinical applicability of the device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a visual operating system for a drainage tube specifically designed for joint surgery according to the present invention. Figure 2 This is a schematic diagram showing the state of the suture cutting device inside the drainage tube in the visual operating system for a joint surgery-specific drainage tube when the drainage tube is inserted. Figure 3 This is a schematic diagram showing the state of the suture cutting device inside the drainage tube in the visual operating system for joint surgery of the present invention, after the elastic shear head is released and radially opened after the drainage tube is inserted. Figure 4 for Figure 3 A magnified view of part A in the diagram; Figure 5 This is a schematic diagram of the connection structure between the elastic shear head, the annular blade, and the guide wire in a visual operating system for a drainage tube specifically designed for joint surgery according to the present invention. Figure 6 This is a schematic diagram showing the unfolded state of the annular blade in the intracavitary visual operating system for joint surgery of the present invention, which is composed of multiple continuous S-shaped units connected end to end. Figure 7 This is a schematic diagram showing the unfolded state of the annular blade in the intracavitary visual operating system for joint surgery of the present invention, which is composed of multiple continuous V-shaped units connected end to end.

[0029] The attached diagram lists the components represented by each number as follows: 1. Drainage tube; 2. Drainage tube support tube; 3. Connecting assembly; 5. Delivery tube; 6. Guide wire; 7. Flexible shearing head; 8. Annular blade; 9. Blade edge; 10. Operating assembly. Detailed Implementation

[0030] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] like Figure 1 As shown, an intracavitary visual operating system for a drainage tube specifically designed for joint surgery includes a drainage tube 1 for insertion into the incision for drainage; The distal end of the drainage tube 1 is provided with an anti-pinch structure, and the proximal end of the drainage tube 1 is provided with an operating component 10. The operating component 10 includes a drainage and discharge device, a visual flushing and suction device, and a suture cutting device inside the drainage lumen. The drainage device is detachably connected to the proximal end of the drainage tube 1 via the connecting component 3; Alternatively, the drainage outlet device is disconnected from the connecting assembly 3, and one of the visual flushing and suction device and the suture cutting device inside the drainage tube is inserted into the inner cavity of the drainage tube 1 through the internal channel of the connecting assembly 3 and reaches the distal end of the drainage tube 1.

[0032] In this embodiment, the drainage device includes a negative pressure bulb and a drainage bag, not shown in the figure. The inlet tube of the negative pressure bulb is detachably connected to the connecting assembly 3 of the drainage tube 1, and the outlet tube of the negative pressure bulb is connected to the inlet of the drainage bag. The connecting assembly 3 is preferably a standard Luer connector or a snap-fit ​​quick connector to ensure reliable sealing and facilitate quick disconnection and switching.

[0033] During normal drainage, a continuous negative pressure is generated by the negative pressure bulb, which draws the exudate and blood from the incision into the negative pressure bulb through drainage tube 1, and then drains it into the drainage bag.

[0034] In this embodiment, the anti-pinch structure is specifically a drainage tube support tube 2. This drainage tube support tube 2 is a rigid sleeve with an inner diameter slightly larger than or equal to the outer diameter of the drainage tube 1, allowing it to be fitted onto the outer wall of the drainage tube 1 from its proximal end and slide axially to its distal end. In use, the drainage tube support tube 2 is pressed into place between the drainage tube 1 and the incision tissue. The outer wall of the support tube fits tightly against the surrounding muscle tissue, preventing it from slipping out. The distal end of the drainage tube support tube 2 is designed with a blunt or rounded tip to avoid scratching or puncturing surrounding tissue during advancement.

[0035] The drainage tube support tube 2 provides rigid support to the distal end of the drainage tube 1 from the outside, effectively isolating the drainage tube 1 from the muscle tissue and preventing passive clamping of the drainage tube 1 lumen due to joint movement or muscle compression. Simultaneously, it does not occupy the internal space of the drainage tube 1, ensuring unobstructed drainage. The entire insertion process of the drainage tube support tube 2 requires no additional incision or puncture, minimizing surgical trauma.

[0036] In this embodiment, the visual flushing and suction device includes a visual flushing and suction tube, an endoscope, a flushing head, and a negative pressure suction head, with the endoscope, flushing head, and negative pressure suction head integrated at the distal end of the visual flushing and suction tube.

[0037] The visual irrigation and aspiration tube is a dual-lumen tube, with its inner lumen comprising an irrigation chamber and an aspiration chamber. The endoscope is embedded at the distal end of the visual irrigation and aspiration tube and located between the irrigation chamber and the aspiration chamber. Both the irrigation head and the negative pressure aspiration head are located at the distal end of the visual irrigation and aspiration tube and communicate with the irrigation chamber and the aspiration chamber, respectively. The distal end of the visual irrigation and aspiration tube is used to insert into the inner lumen of the drainage tube 1 through the internal channel of the connecting assembly 3 and reach the distal end of the drainage tube 1. Its proximal end is connected to the irrigation pump and the negative pressure aspiration pump (not shown in the figure). The irrigation chamber is connected to the irrigation pump, and the aspiration chamber is connected to the negative pressure aspiration pump.

[0038] When drainage tube 1 becomes blocked by blood clots, disconnect the connecting assembly 3 and insert the visual flushing and suction tube into the lumen of drainage tube 1 through the internal channel of the connecting assembly 3. The location of the blockage is observed in real time using an endoscope. Physiological saline or thrombolytic drugs are injected into the blockage using the flushing chamber, while the aspiration chamber is used to remove the fragmented blood clots, achieving precise clearing of the blockage.

[0039] like Figures 2-5 As shown, in this embodiment, the suture cutting device inside the drainage tube includes a delivery tube 5, a guide wire 6, and an elastic cutting head 7 housed in the inner cavity of the delivery tube 5 in a compressed state.

[0040] The outer diameter of the delivery tube 5 is smaller than the inner diameter of the drainage tube 1 to facilitate insertion. The distal end of the guidewire 6 is fixedly connected to the flexible shear head 7, and its proximal end extends beyond the proximal end of the delivery tube 5 for easy operation. Preferably, an endoscope can also be fixed to the distal end of the guidewire 6 to achieve real-time visual guidance.

[0041] The flexible shear head 7 is a mesh structure woven from nickel-titanium alloy wire, shaped like a conical funnel. Its distal diameter is larger than its proximal diameter, while its proximal diameter is smaller than the inner diameter of the delivery tube 5 and is fixedly connected to the guide wire 6. An annular blade 8, made of nickel-titanium alloy, is located on the distal outer edge of the flexible shear head 7, with its cutting edge 9 facing towards the proximal end of the flexible shear head 7. The annular blade 8 is composed of multiple continuous V-shaped or S-shaped segments connected end-to-end. The distal end of the annular blade 8 is flush with the distal end of the flexible shear head 7 and is fixedly connected to it.

[0042] When it is discovered that the drainage tube 1 has been mistakenly sutured by surgical sutures, first remove the negative pressure bulb and the drainage tube. Then, insert the delivery tube 5, along with the internally compressed elastic shear head 7, into the drainage tube 1 through the internal channel of the connecting component 3. Under visual guidance, push the elastic shear head 7 to the location of the suture. Then, retract the delivery tube 5 until the elastic shear head 7 is released from the distal end of the delivery tube 5. The elastic shear head 7 automatically opens radially under its own elastic force, and its distal end stably adheres to the inner wall of the drainage tube. The annular blade 8 opens synchronously with the elastic shear head 7, tightly adhering to the inner wall of the lumen circumferentially. At this time, the operator pulls back the guide wire 6 proximally. The cutting edge 9 of the annular blade 8 faces the proximal direction. One pull can cover the entire circumference of the suture in the drainage tube 1, cutting the suture completely and accurately, and bringing out the cut suture remnants to avoid residue.

[0043] After the shearing operation is completed, continue to pull back the guide wire 6 or push the delivery tube 5 forward, so that the proximal end of the elastic shear head 7 enters the delivery tube 5 first. The mesh structure is evenly compressed until the annular blade 8 and the elastic shear head 7 are compressed again into the inner cavity of the delivery tube 5. Since the proximal diameter of the elastic shear head 7 is smaller than the inner diameter of the delivery tube 5, the proximal end of the elastic shear head 7 can smoothly enter the inner cavity of the delivery tube 5 and be compressed and stored in the delivery tube 5. Finally, remove the entire device from the drainage tube 1. At this time, the drainage tube 1 is unobstructed and the drainage outlet device can be reconnected to continue drainage.

[0044] In this embodiment, the drainage tube 1 can be made of medical-grade silicone or polyurethane.

[0045] The drainage tube support tube 2 is made of medical-grade rigid plastic such as polypropylene or polycarbonate, with a rounded distal end.

[0046] The main body of the visual flushing and suction tube is made of flexible polymer material, and the endoscope is made of fiber optic or electronic endoscope.

[0047] Both the flexible shear head 7 and the annular blade 8 are made of nickel-titanium alloy, and the phase change temperature is set at 25℃~35℃ to ensure that they can open smoothly and automatically at body temperature.

[0048] like Figure 6 and 7 As shown, the annular blade is composed of multiple continuous V-shaped or S-shaped units connected end to end. The number of V-shaped or S-shaped units of the annular blade 8 is 6 to 12, which are evenly distributed. The cutting edge 9 is electrochemically polished, making it sharp without damaging the pipe wall.

[0049] Working principle of the invention: Normal drainage: Drainage tube 1 is inserted into the incision, drainage tube support tube 2 is put on to the distal end, and negative pressure bulb and drainage bag are connected for continuous negative pressure drainage.

[0050] Clearing blockage procedure: Blockage detected → Remove negative pressure bulb and drainage bag → Insert visual flushing and suction tube → Locate blockage with endoscope → Flushing and suction to remove blood clots → Withdraw visual flushing and suction tube → Reconnect drainage and exit device.

[0051] Cutting the suture: If an incorrect suture is found, remove the negative pressure bulb and drainage bag. Insert the delivery tube 5 and the compressed elastic shear head 7 to the suture. Retract the delivery tube 5 to release the elastic shear head 7. Pull back the guide wire 6 to cut the suture and remove the remaining end. Retract the shear head. Reconnect the drainage.

[0052] This achieves multi-functional integration of drainage, visual unblocking, support and anti-clamping, and intracavitary suture cutting, significantly improving the reliability and safety of joint surgery drainage.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A visual operating system for intracavitary drainage tubes specifically designed for joint surgery, characterized in that, Includes a drainage tube (1) for insertion into the incision for drainage; The distal end of the drainage tube (1) is provided with an anti-pinch structure, and the proximal end of the drainage tube (1) is provided with an operating component (10). The operating component (10) includes a drainage and discharge device, a visual flushing and suction device, and a suture cutting device inside the drainage lumen. The drainage device is detachably connected to the proximal end of the drainage tube (1) via the connecting component (3); Alternatively, the drainage outlet device is disconnected from the connecting assembly (3), and one of the visual flushing suction device and the drainage tube lumen suture cutting device is inserted into the lumen of the drainage tube (1) through the internal channel of the connecting assembly (3) and reaches the distal end of the drainage tube (1).

2. The intracavitary visual operating system for joint surgery drainage tubes according to claim 1, characterized in that, The anti-pinch structure is a drainage tube support tube (2), which is a rigid sleeve that is sleeved on the outer wall of the drainage tube (1) from the proximal end of the drainage tube (1) and slides to the distal end of the drainage tube (1).

3. The intracavitary visual operating system for joint surgery drainage tubes according to claim 2, characterized in that, The distal end of the drainage tube support tube (2) has a blunt or rounded head structure.

4. The intracavitary visual operating system for joint surgery drainage tubes according to claim 1, characterized in that, The drainage device includes a negative pressure ball and a drainage bag. The inlet tube of the negative pressure ball is detachably connected to the connecting assembly (3), and the outlet tube of the negative pressure ball is connected to the inlet of the drainage bag.

5. The intracavitary visual operating system for joint surgery drainage tubes according to claim 1, characterized in that, The visual flushing and suction device includes a visual flushing and suction tube, an endoscope, a flushing head, and a negative pressure suction head; The visible flushing and suction tube is a dual-lumen tube, the inner lumen of which includes a flushing chamber and a suction chamber; The endoscope is embedded at the distal end of the visual irrigation and suction tube and is located between the irrigation chamber and the suction chamber. The irrigation head and the negative pressure suction head are both located at the distal end of the visual irrigation and suction tube and are respectively connected to the irrigation chamber and the suction chamber. The distal end of the visual flushing suction tube is inserted into the inner cavity of the drainage tube (1) through the internal channel of the connecting assembly (3) and reaches the distal end of the drainage tube (1), and its proximal end is connected to the flushing pump and the negative pressure suction pump respectively.

6. The intracavitary visual operating system for joint surgery drainage tubes according to claim 1, characterized in that, The suture cutting device inside the drainage tube includes a delivery tube (5), a guide wire (6), and an elastic shear head (7) housed in the inner cavity of the delivery tube (5) in a compressed state. The outer diameter of the delivery tube (5) is smaller than the inner diameter of the drainage tube (1), and its distal end is used to be inserted into the inner cavity of the drainage tube (1) through the internal channel of the connecting assembly (3) and reach the distal end of the drainage tube (1); The distal end of the guide wire (6) is fixedly connected to the elastic shear head (7), and its proximal end extends to the proximal end of the delivery tube (5).

7. The intracavitary visual operating system for joint surgery drainage tubes according to claim 6, characterized in that, The distal outer edge of the elastic shear head (7) is provided with an annular blade (8), which is made of nickel-titanium alloy and its cutting edge (9) faces the proximal end of the elastic shear head (7).

8. The intracavitary visual operating system for joint surgery drainage tubes according to claim 7, characterized in that, The elastic shear head (7) is a conical funnel shape, with its distal diameter being larger than its proximal diameter and its proximal diameter being smaller than the inner diameter of the delivery tube (5) and fixedly connected to the guide wire (6).

9. The intracavitary visual operating system for joint surgery drainage tubes according to claim 7, characterized in that, The elastic shear head (7) is a mesh structure woven from nickel-titanium alloy wire.

10. The intracavitary visual operating system for a joint surgery drainage tube according to claim 7, characterized in that, The annular blade (8) is composed of multiple continuous V-shaped or S-shaped units connected end to end. The distal end of the annular blade (8) is flush with the distal end of the elastic shear head (7) and is fixedly connected to the elastic shear head (7).

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