Clinical thrombolysis catheter fixing device for vascular surgery

Abstract

The invention relates to the technical field of medical instruments, and discloses a vascular surgery clinical thrombolysis catheter fixing device which comprises a single-cavity tube, a fixing mechanism arranged at the top of the single-cavity tube and a clamping mechanism arranged on the outer side of the fixing mechanism. The fixing mechanism is used for fixing the skin of a patient and the top end of the single-cavity tube, and the clamping mechanism is used for fixing the tail end of the guide wire; the fixing mechanism comprises a connector arranged at the top of the single-cavity pipe, a sliding groove formed in the middle of the connector, two sliding blocks symmetrically arranged on the two sides of the sliding groove, telescopic units arranged at the bottoms of the sliding blocks and used for transmitting the acting force of the sliding blocks, a connecting plate arranged at the bottom of the sliding groove and two tension springs symmetrically arranged on the two sides of the connecting plate. By arranging the fixing mechanism, the device can be adjusted to adapt to the body surface so as to adapt to the joint, the neck or the groin and other areas, the fixing device can restrain the tail end of the guide wire, and axial sliding or radial deflection of the guide wire caused by external force interference is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a thrombolytic catheter fixation device for clinical use in vascular surgery. Background Art

[0002] The thrombolytic catheter fixation device for clinical use in vascular surgery is a medical auxiliary device designed specifically for interventional thrombolytic therapy. It is mainly used to ensure the stable position of the thrombolytic catheter during the treatment process, prevent displacement or detachment, thereby improving the thrombolytic effect and reducing the risk of complications. Its core function is to anchor the catheter to the skin surface through a fixation mechanism to ensure that the thrombolytic drug acts precisely on the thrombus site. In clinical applications, this device significantly reduces the risks such as leakage of thrombolytic drugs, local tissue damage caused by catheter displacement, or pulmonary embolism caused by thrombus detachment. It is particularly suitable for long-term thrombolytic therapy for deep vein thrombosis, arterial embolism, and pulmonary artery embolism.

[0003] Traditional thrombolytic catheter fixation devices are widely used in the medical field. However, due to the limitations of their structures and working principles, there are often some problems that cannot be ignored. For example, it is difficult to fit the anatomical characteristics of different parts of the human body. In areas with large body surface curvatures such as the neck or groin, due to the lack of a flexible adjustment structure in traditional devices, it is easy to cause fixation failure due to the inability to fit the body surface, resulting in catheter displacement or even slippage. Secondly, the functions of the device are concentrated on the anchoring of the catheter itself, and there are obvious defects in the protection and fixation of the puncture wound and the surrounding skin. It is unable to fix the wound and the surrounding skin, and it is easy to cause traction on the wound when the patient moves. The fixation design of the distal end of the guide wire in traditional devices is relatively rough, usually relying on simple buckles or tape winding, and it is difficult to achieve stable and aseptic closed management. Exposure or insecure fixation of the distal end of the guide wire may lead to accidental traction, folding, or contamination, which not only affects the continuity of thrombolytic drug infusion but also may cause serious complications such as thrombus detachment due to the retraction of the guide wire. Summary of the Invention

[0004] In view of the problems existing in the prior art that it cannot adapt well to different parts of the human body, lacks fixation of the wound and its surrounding skin, and is not convenient for fixing the distal end of the guide wire, a thrombolytic catheter fixation device for clinical use in vascular surgery is proposed.

[0005] Its purpose is to: be able to adapt to the body contours of different parts to prevent detachment, fix the wound and the surrounding skin, prevent traction on the wound, and fix the distal end of the guide wire.

[0006] The technical solution of the present invention is a thrombolytic catheter fixation device for clinical use in vascular surgery, which includes a single lumen tube, and also includes a fixation mechanism arranged at the top of the single lumen tube, and a clamping mechanism arranged outside the fixation mechanism;

[0007] The fixing mechanism is used to fix the patient's skin and the top end of the single-lumen tube, and the clamping mechanism is used to fix the end of the guide wire.

[0008] The fixing mechanism includes a joint arranged at the top of the single-lumen tube, a chute opened in the middle of the joint, two sliders symmetrically arranged on both sides of the chute, a telescopic unit arranged at the bottom of the slider for transmitting the acting force of the slider, a connecting plate arranged at the bottom of the chute, two tension springs symmetrically arranged on both sides of the connecting plate, one ends of the two tension springs away from the connecting plate are respectively fixedly connected to the two sliders, a receiving cavity opened at the top of the joint, two wire holes symmetrically opened on both sides of the receiving cavity, the ends of the wire holes away from the receiving cavity communicate with the chute, a winch arranged inside the receiving cavity, an anti-slip ring arranged at the top edge of the winch, a knob arranged at the center of the top of the winch, a spring arranged at the bottom of the winch, the top and bottom of the spring are respectively abutted against the winch and the receiving cavity, and a cable arranged on the side of the slider away from the tension spring, the top of the cable is fixedly connected to the winch.

[0009] Further, a toothed anti-slip groove is opened on the inner wall of the top of the receiving cavity, and the shape of the anti-slip groove matches the outer shape of the anti-slip ring.

[0010] Further, the winch has an I-shaped outer shape, and the maximum diameter of the winch matches the inner diameter of the receiving cavity.

[0011] Further, the telescopic unit includes a lead screw arranged at the bottom of the slider, a rubber plate arranged at the bottom of the connecting plate, a straight groove opened at the top of the rubber plate, a through hole opened on the side of the rubber plate away from the straight groove, a sleeve arranged at the bottom of the lead screw, a deep hole opened at the top of the sleeve, a moving block arranged at the bottom of the sleeve, the outside of the moving block is slidably connected to the straight groove, an annular groove opened at the top of the sleeve, a threaded block arranged on the outside of the annular groove, and a threaded hole opened at the top of the threaded block, the inside of the threaded hole is meshed with the lead screw.

[0012] Further, the diameter of the lead screw matches the diameter of the deep hole, and the cross-section of the straight groove is T-shaped.

[0013] Further, the clamping mechanism includes a driving ring arranged outside the joint, a reduced-diameter hole opened on the side of the joint close to the single-lumen tube, a guide wire arranged inside the reduced-diameter hole, two square grooves symmetrically opened on the side of the reduced-diameter hole close to the single-lumen tube, a stepped hole opened on the side of the square groove away from the reduced-diameter hole, a clamping block arranged inside the square groove, a push rod arranged on the side of the clamping block away from the reduced-diameter hole, a pressing plate arranged on the side of the push rod away from the clamping block, and a rubber ring arranged on the side of the stepped hole away from the pressing block, the side of the rubber ring away from the clamping block abuts against the pressing plate, and the side of the push rod close to the rubber ring is slidably connected to the driving ring.

[0014] Further, threads are provided at the position of the joint close to the driving ring, and threads are also provided inside the driving ring.

[0015] Furthermore, the side of the push rod away from the clamping block is a bevel surface, and the surface where the driving ring is connected to the push rod is also a bevel surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the fixing mechanism, the device can be adjusted to adapt to the body surface morphology, so as to adapt to areas such as joints, necks or groins. While maintaining the overall stability, it matches the skin tension, reduces the risk of catheter offset caused by anatomical differences, enables the device to adapt to different positions of the human body and different patients, thereby increasing the applicability of the device.

[0018] 2. By setting the clamping mechanism, the fixing device can restrain the tail end of the guide wire, avoid the axial sliding or radial deflection of the guide wire caused by external interference, reduce the vibration transmission when the operator holds the guide wire, maintain the relative position stability of the end of the guide wire and the target point in the blood vessel, and prevent accidental displacement caused by limb movement or device connection, reduce the influence of human factors on the guide wire positioning, ensure the accurate infusion of thrombolytic drugs through the guide wire lumen to the thrombus site, and at the same time reduce the risk of blood vessel wall injury or thrombus detachment caused by the displacement of the guide wire.

[0019] 3. By setting the rubber plate, the fixing device can fit the patient's body surface, realize the stable connection between the wound and the surrounding skin. The surface of the rubber plate has adhesion characteristics, can be in close contact with the skin, form a flat support surface, the fixing device covers the wound area, evenly disperses the direct action of external force on the wound, reduces the displacement of the local skin caused by limb movement, the edge of the device extends to the healthy skin tissue, uses the adhesion of the rubber plate to form a buffer area, restricts the movement range of the tissue around the wound, and the flexibility of the material adapts to the physiological curvature of joints or muscles, avoiding excessive compression while maintaining the fixing effect. Brief Description of the Drawings

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the whole of the present invention;

[0021] Figure 2 It is a connection schematic diagram of the joint and the driving ring of the present invention;

[0022] Figure 3 It is a connection schematic diagram of the winch and the joint of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the joint of the present invention;

[0024] Figure 5 It is a connection schematic diagram of the cable and the winch of the present invention;

[0025] Figure 6 It is a connection schematic diagram of the lead screw and the threaded block of the present invention;

[0026] Figure 7 Schematic diagram of the sleeve and threaded block of the present invention;

[0027] Figure 8 Schematic diagram of the rubber plate of the present invention;

[0028] Figure 9 Overall structural schematic diagram of the clamping mechanism of the present invention;

[0029] Figure 10 Cross-sectional view of the joint of the present invention;

[0030] Figure 11 Schematic diagram of the clamping block and push rod of the present invention.

[0031] In the figure:

[0032] 1, single-chamber tube; 2, fixing mechanism; 3, clamping mechanism; 21, joint; 22, chute; 23, slider; 24, connecting plate; 25, tension spring; 26, accommodation cavity; 27, wire hole; 28, winch; 29, anti-slip ring; 210, knob; 211, spring; 212, cable; 213, lead screw; 214, rubber plate; 215, straight groove; 216, through hole; 217, sleeve; 218, deep hole; 219, moving block; 220, annular groove; 221, threaded block; 222, threaded hole; 31, driving ring; 32, variable-diameter hole; 33, guide wire; 34, square groove; 35, stepped hole; 36, clamping block; 37, push rod; 38, pressing plate; 39, rubber ring. Detailed implementation manners

[0033] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention is made with reference to the accompanying drawings of the specification.

[0034] Example 1, referring to Figures 1 - 11, which is the first embodiment of the present invention, provides a thrombolytic catheter fixing device for clinical use in vascular surgery, including a single-lumen tube 1, a fixing mechanism 2 installed on the top of the single-lumen tube 1, and a clamping mechanism 3 installed on the outside of the fixing mechanism 2; the fixing mechanism 2 is used to fix the patient's skin and the top end of the single-lumen tube 1, and the clamping mechanism 3 is used to fix the end of the guide wire 33; the fixing mechanism 2 includes a joint 21 fixedly connected to the top of the single-lumen tube 1, a chute 22 opened in the middle of the joint 21, two sliders 23 symmetrically and slidably connected to both sides of the chute 22, a telescopic unit assembled at the bottom of the slider 23 for transmitting the acting force of the slider 23, a connecting plate 24 fixedly connected to the bottom of the chute 22, two tension springs 25 symmetrically and fixedly connected to both sides of the connecting plate 24, one end of the two tension springs 25 away from the connecting plate 24 is respectively fixedly connected to the two sliders 23, a receiving cavity 26 opened at the top of the joint 21, two wire holes 27 symmetrically opened on both sides of the receiving cavity 26, one end of the wire hole 27 away from the receiving cavity 26 communicates with the chute 22, a winch 28 rotatably connected to the inside of the receiving cavity 26, an anti-slip ring 29 fixedly connected to the top edge of the winch 28, a knob 210 fixedly connected to the center of the top of the winch 28, a spring 211 abutting against the bottom of the winch 28, the top and bottom of the spring 211 are respectively abutted against the winch 28 and the receiving cavity 26, and a cable 212 fixedly connected to the side of the slider 23 away from the tension spring 25, the top of the cable 212 is fixedly connected to the winch 28.

[0035] Specifically, the joint 21 can play the role of connecting and carrying various components, the chute 22 can restrict the movement trajectory of the slider 23, the connecting plate 24 can divide the chute 22 into two parts and can connect the rubber plate 214, the tension spring 25 can apply a continuous acting force to the slider 23 so that the slider 23 can reset when the external force is removed, the receiving cavity 26 can provide a movement space for the winch 28 and the spring 211, the wire hole 27 can restrict the top of the cable 212 so that the cable 212 enters the receiving cavity 26 at an appropriate angle, the winch 28 can wind and unwind the cable 212 to control the position of the slider 23, after the anti-slip ring 29 cooperates with the top of the receiving cavity 26, it can prevent the winch 28 from rotating by itself, by rotating the knob 210, the winch 28 can be driven to rotate synchronously, the spring 211 can push up the winch 28 and the anti-slip ring 29 so that the winch 28 can be in a locked state, after the cable 212 is wound by the winch 28, it can pull the slider 23 to drive the slider 23 to rotate.

[0036] Referring to Figure 3 and Figure 5 , a circle of tooth-shaped anti-slip grooves 22 are formed on the inner wall of the top of the receiving cavity 26, and the shape of the anti-slip grooves 22 matches the outer shape of the anti-slip ring 29.

[0037] Specifically, the anti-slip groove 22 can cooperate with the anti-slip ring 29. When they are in a cooperative state, they can lock the winch 28 to prevent it from rotating.

[0038] Referring to Figures 3 - 5 , the winch 28 has an I-shaped outer shape, and the maximum diameter of the winch 28 matches the inner diameter of the receiving cavity 26.

[0039] Specifically, the winch 28 winds the cable 212 through a thinner middle position, and pulls the slider 23 through the cable 212. The maximum diameter portion of the winch 28 can fit with the receiving cavity 26 to prevent the cable 212 from winding into the wrong area.

[0040] Referring to Figures 6 - 8 , the telescopic unit includes a lead screw 213 fixedly connected to the bottom of the slider 23, a rubber plate 214 fixedly connected to the bottom of the connecting plate 24, a straight groove 215 opened at the top of the rubber plate 214, a through hole 216 opened on the side of the rubber plate 214 away from the straight groove 215, a sleeve 217 slidably connected to the bottom of the lead screw 213, a deep hole 218 opened at the top of the sleeve 217, a moving block 219 fixedly connected to the bottom of the sleeve 217, the outside of the moving block 219 is slidably connected to the straight groove 215, a ring groove 220 opened at the top of the sleeve 217, a threaded block 221 rotatably connected to the outside of the ring groove 220, and a threaded hole 222 opened at the top of the threaded block 221. The inner side of the threaded hole 222 is meshed and connected to the lead screw 213.

[0041] Specifically, the lead screw 213 can rotate together with the slider 23 and can transmit the acting force while rotating. The bottom of the rubber plate 214 has adhesiveness and can be pasted on the surface of the skin to provide fixation and support for the entire device. The straight groove 215 can accommodate the movement of the moving block 219 inside and can deform under the pull of the moving block 219. The through hole 216 can surround the wound and can prevent the deformation of the skin generated when the patient moves from being transmitted to the connection between the wound and the single lumen tube 1, preventing secondary injury to the wound. The sleeve 217 can transmit the acting force of the lead screw 213 to the moving block 219 and can accommodate the lead screw 213 through the deep hole 218. The ring groove 220 can restrict the threaded block 221. By rotating the threaded block 221, it can move along the lead screw 213.

[0042] Referring to Figure 6 and Figure 7 , the diameter of the lead screw 213 matches the diameter of the deep hole 218, and the cross-section of the straight groove 215 is T-shaped.

[0043] Specifically, the bottom of the lead screw 213 can extend into the inside of the deep hole 218, and the straight groove 215 can restrict the moving block 219 through the T-shaped outer shape.

[0044] Embodiment 2, referring to Figures 9 - 11 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the clamping mechanism 3 includes a driving ring 31 meshingly connected to the outside of the joint 21, a reduced-diameter hole 32 opened on the side of the joint 21 close to the single-chamber tube 1, a guide wire 33 slidably connected to the inside of the reduced-diameter hole 32, two symmetrically opened square grooves 34 on the side of the reduced-diameter hole 32 close to the single-chamber tube 1, a stepped hole 35 opened on the side of the square groove 34 away from the reduced-diameter hole 32, a clamping block 36 abutted against the inside of the square groove 34, a push rod 37 fixedly connected to the side of the clamping block 36 away from the reduced-diameter hole 32, a pressing plate 38 fixedly connected to the side of the push rod 37 away from the clamping block 36, and a rubber ring 39 fixedly connected to the side of the stepped hole 35 away from the pressing block. The side of the rubber ring 39 away from the clamping block 36 abuts against the pressing plate 38, and the side of the push rod 37 close to the rubber ring 39 is slidably connected to the driving ring 31.

[0045] Specifically, by rotating the driving ring 31, it can move along the axis of the joint 21. The reduced-diameter hole 32 can accommodate various types of guide wires 33 for internal operations. The guide wire 33 can pass through the inside of the single-chamber tube 1 and perform operations such as closing the single-chamber tube 1. The square groove 34 can accommodate a space that forms with the stepped hole 35 to accommodate moving parts. The clamping block 36 can fix the guide wire 33 after being driven. The push rod 37 can transmit the acting force of the driving ring 31 and drive the clamping block 36 to move together while moving. The pressing plate 38 can move together with the push rod 37. The rubber ring 39 will deform after receiving the pressure from the pressing plate 38 and can drive the pressing plate 38 to reset.

[0046] Referring to Figures 4 - 9 There is a thread at the position of the joint 21 close to the driving ring 31, and the inner side of the driving ring 31 is also provided with a thread.

[0047] Specifically, the joint 21 is meshingly connected to the driving ring 31 through the thread. When the driving ring 31 rotates, it can move along the axis of the joint 21 under the action of the thread and squeeze the push rod 37 while moving.

[0048] Referring to Figure 9 and Figure 11 The side of the push rod 37 away from the clamping block 36 is a slope, and the surface of the driving ring 31 connected to the push rod 37 is also a slope.

[0049] Specifically, the push rod 37 is connected to the driving ring 31 through the slope. The push rod 37 can move together with the driving ring 31, and the rest of the structure is the same as that of Embodiment 1.

[0050] In summary, the working principle of the present invention is as follows: the single-lumen tube 1 is passed through the top of the through hole 216, and then the single-lumen tube 1 is extended into the patient's body, and then the through hole 216 is aligned with the wound, and the rubber plate 214 is attached to the patient's skin so that the wound is in the center of the through hole 216. When the rubber plate 214 is attached, it can fix the skin at the attached position, and can prevent the skin stretching deformation caused by the patient's movement from being transmitted to the wound to avoid causing injury. The curvature of the rubber plate 214 can be adjusted by the knob 210 to make it fit the contour of the human body. By pressing the knob 210 downward, the knob 210 moves downward while driving the capstan 28 downward, and the capstan 28 drives the anti-slip ring 29 to move synchronously, and squeezes the spring 211 while moving, and then the knob 210 is turned. The knob 210 drives the capstan 28 to rotate together. The capstan 28 rotates and the cable 212 is wound up. The cable 212 is wound up and the slider 23 is pulled to move upward. The tension spring 25 is stretched when the slider 23 moves. After the slider 23 is moved to a suitable position, the capstan 28 is moved upward. The capstan 28 drives the anti-skid ring 29 to move upward until the anti-skid ring 29 is matched with the top of the accommodating chamber 26. Due to the lifting of the spring 211, the anti-skid ring 29 will maintain the matching state with the accommodating chamber 26. By pressing the knob 210 and the capstan 28 downward and reversing them, the pulling on the slider 23 can be gradually released. The slider 23 will be reset under the action of the tension spring 25. The slider 23 will drive the screw rod 213 to move together when it moves. , the screw rod 213 drives the threaded block 221 and the sleeve 217 to move together, and the sleeve 217 drives the moving block 219 to move synchronously. The moving block 219 will move along the straight groove 215 on the rubber plate 214, and make the rubber plate 214 bend and deform while moving. When the slider 23 moves upward, the two sides of the rubber plate 214 bend upward. When the slider 23 is pulled to the lowest point by the tension spring 25, the two sides of the rubber plate 214 bend downward. By rotating the threaded block 221, it can be moved upward along the screw rod 213, and at the same time drive the sleeve 217 and the moving block 219 to move synchronously, so that the length of the force arm formed by the screw rod 213 and the sleeve 217 is shortened. At this time, the rubber plate 214 can be driven to bend upward to a greater extent. By reversing By rotating the threaded block 221, the length of the force arm formed by the screw rod 213 and the sleeve 217 is increased, which can drive the rubber plate 214 to bend downward to a greater extent. By controlling the bending direction and amplitude of the rubber plate 214, it can be made to fit the protruding or recessed contours of different parts of the human body, and at the same time provide fixation for the device, it can also fix the skin to prevent the situation of pulling the wound that is easy to occur in traditional adhesive tape fixation. After the guide wire 33 is inserted into a suitable position, the drive ring 31 is rotated to move it in the direction away from the knob 210. While the drive ring 31 moves, the push rod 37 is squeezed to move the push rod 37 in the direction of the guide wire 33. The push rod 37 drives the pressure plate 38 and the clamping block 36 to move together until the clamping block 36 clamps and fixes the tail end of the guide wire 33.To prevent the guide wire 33 from retracting and unnecessary displacement caused by manual operation, while the pressing plate 38 moves, it will squeeze the rubber ring 39, causing the rubber ring 39 to deform. By reversing the driving ring 31 and moving it towards the direction close to the knob 210, the extrusion on the push rod 37 can be gradually released. The push rod 37 and the pressing plate 38 will reset under the action of the rubber ring 39, and drive the clamping block 36 to reset, thereby releasing the fixation of the guide wire 33.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A thrombolytic catheter fixation device for clinical use in vascular surgery, including a single-lumen tube, characterized in that: It also includes a fixing mechanism disposed on the top of the single-lumen tube, and a clamping mechanism disposed outside the fixing mechanism; The fixing mechanism is used to fix the patient's skin and the top end of the single-lumen tube, and the clamping mechanism is used to fix the end of the guide wire; The fixing mechanism includes a joint arranged at the top of the single-lumen tube, a slide groove opened in the middle of the joint, two sliders symmetrically arranged on both sides of the slide groove, a telescopic unit arranged at the bottom of the slider for transmitting the force of the slider, a connecting plate arranged at the bottom of the slide groove, two tension springs symmetrically arranged on both sides of the connecting plate, one end of the two tension springs and the connecting plate are respectively fixedly connected to the two sliders, a accommodating cavity opened at the top of the joint, two wire holes symmetrically opened on both sides of the accommodating cavity, one end of the wire hole away from the accommodating cavity is communicated with the slide groove, a capstan arranged on the inner side of the accommodating cavity, an anti-slip ring arranged at the top edge of the capstan, a knob arranged in the center of the top of the capstan, a spring arranged at the bottom of the capstan, the top and bottom of the spring respectively abut against the capstan and the accommodating cavity, and a cable arranged on the side of the slider away from the tension spring, and the top of the cable is fixedly connected to the capstan.

2. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 1, wherein: The inner wall at the top of the accommodating cavity is provided with a circle of toothed anti-skid grooves, and the shape of the anti-skid grooves matches the shape of the anti-skid ring.

3. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 2, characterized in that: The capstan has an I-shaped outer shape, and the maximum diameter of the capstan matches the inner diameter of the accommodating cavity.

4. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 1, characterized in that: The telescopic unit includes a screw rod arranged at the bottom of the slider, a rubber plate arranged at the bottom of the connecting plate, a straight groove opened at the top of the rubber plate, a through hole opened at the side of the rubber plate away from the straight groove, a sleeve arranged at the bottom of the screw rod, a deep hole opened at the top of the sleeve, a moving block arranged at the bottom of the sleeve, the outer side of the moving block is slidably connected to the straight groove, an annular groove opened at the top of the sleeve, a threaded block arranged at the outer side of the annular groove, and a screw hole opened at the top of the screw block, and the inner side of the screw hole is meshed and connected with the screw rod.

5. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 4, characterized in that: The diameter of the screw rod matches the diameter of the deep hole, and the cross section of the straight groove is T-shaped.

6. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 1, characterized in that: The clamping mechanism includes a driving ring arranged on the outside of the joint, a reducing hole opened on the side of the joint close to the single-lumen tube, a guide wire arranged on the inside of the reducing hole, two square grooves symmetrically opened on the side of the reducing hole close to the single-lumen tube, a stepped hole opened on the side of the square groove away from the reducing hole, a clamping block arranged on the inside of the square groove, a push rod arranged on the side of the clamping block away from the reducing hole, a pressure plate arranged on the side of the push rod away from the clamping block, and a rubber ring arranged on the side of the stepped hole away from the pressure block, the side of the rubber ring away from the clamping block abuts against the pressure plate, and the side of the push rod close to the rubber ring is slidably connected to the driving ring.

7. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 6, wherein: The position of the joint near the driving ring is provided with threads, and the inner side of the driving ring is also provided with threads.

8. The thrombolytic catheter fixing device for clinical use in vascular surgery according to claim 6, wherein: The side of the push rod away from the clamping block is an inclined surface, and the surface where the driving ring and the push rod are connected is also an inclined surface.

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