Thrombolysis catheter kit

Abstract

The utility model provides a thrombolysis catheter suite, which relates to the technical field of medical instruments, the thrombolysis catheter suite comprises an outer tube and an inner tube, a first backstop part is arranged inside the far end of the outer tube, and a first opening is defined by the first backstop part and the inner side wall of the outer tube in the circumferential direction of the first backstop part; a first liquid outlet is formed in the pipe wall of the outer pipe; a second stop part is arranged in the far end of the inner tube, and a second opening is defined by the second stop part and the inner wall of the inner tube in the circumferential direction; a second liquid outlet is formed in the pipe wall of the inner pipe; a liquid inlet is formed in the inner pipe; the inner pipe is positioned in the outer pipe and is coaxially arranged with the outer pipe; the inner tube can move to a first state, a second state and a third state relative to the outer tube.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a thrombolytic catheter kit. Background Art

[0002] There are usually three modes of use for thrombolytic therapy in the existing technology during treatment: 1. Acute treatment period: manual pumping or rapid push injection of large doses of thrombolytic solution to achieve the purpose of rapid dredging of fresh thrombus; 2. Slow infusion treatment period: 3-7 days of slow infusion or dripping for catheterization treatment to achieve the purpose of final dredging; 3. Treatment observation period: high-pressure pumping of contrast agent for contrast diagnosis. The existing thrombolytic catheter cannot take into account all three modes. Utility Model Content

[0003] The utility model aims to provide a thrombolytic catheter kit to alleviate the technical problem that the thrombolytic catheter cannot take into account multiple modes and cannot adapt to the current treatment process.

[0004] The utility model provides a thrombolytic catheter kit, comprising:

[0005] The outer tube has a first stopper disposed inside the distal end of the outer tube, and the first stopper and the inner wall of the outer tube in the circumferential direction thereof form a first opening; a first liquid outlet is disposed on the tube wall of the outer tube;

[0006] The inner tube has a second stopper disposed inside the distal end of the inner tube, and the second stopper and the inner wall of the inner tube in the circumferential direction thereof form a second opening; a second liquid outlet is disposed on the tube wall of the inner tube; and a liquid inlet is disposed on the inner tube;

[0007] The inner tube is located inside the outer tube, and the two are coaxially arranged;

[0008] The inner tube is movable relative to the outer tube to a first state, a second state, and a third state;

[0009] In the first state, the first stopper is completely offset from the second opening, and the second stopper is completely offset from the first opening;

[0010] In the second state, the first stopper blocks a portion of the second opening, and the second stopper blocks a portion of the first opening;

[0011] In the third state, the first stopper blocks the second opening, and the second stopper blocks the first opening;

[0012] And in the second state and the third state, the first liquid outlet is connected to the second liquid outlet;

[0013] An interlocking structure is provided on the first stop portion and the second stop portion respectively, and the interlocking structure is used to lock the first stop portion and the second stop portion in the axial direction to reduce deformation of the first stop portion and the second stop portion.

[0014] Further, the first stop portion includes at least two first stoppers arranged along the circumferential direction, and / or the second stop portion includes at least two second stoppers arranged along the circumferential direction at intervals.

[0015] Further, the inner tube is capable of axial movement relative to the outer tube;

[0016] The inner side wall of the outer tube is provided with a positioning protrusion protruding inwards, and the positioning protrusion is used to abut against the outer side wall of the distal end of the inner tube.

[0017] Furthermore, the positioning protrusion is annular, and the annular positioning protrusion is coaxially arranged with the outer tube;

[0018] Alternatively, the positioning protrusion includes at least two first protrusion units spaced apart along the circumferential direction, a groove structure is formed between two adjacent first protrusion units, and a second protrusion unit for correspondingly plugging into the groove structure is provided on the outer side wall of the distal end of the inner tube;

[0019] Alternatively, the inner tube is rotatable relative to the outer tube, the positioning protrusion comprises a spiral protrusion extending in an axial spiral direction, and from the proximal end toward the distal end, the distance between the top of the spiral protrusion and the axis of the outer tube gradually decreases.

[0020] Further, the interlocking structure includes a first magnet disposed on the first stopper, and a second magnet disposed on the second stopper;

[0021] Alternatively, the inner tube can rotate relative to the outer tube, and the interlocking structure includes a first lock buckle arranged on the first stopper, and a second lock buckle arranged on the second stopper, and the first lock buckle and the second lock buckle are locked by rotation;

[0022] Alternatively, the inner tube can move axially relative to the outer tube, and the interlocking structure includes a first concave-convex structure arranged on the first stop portion and arranged axially, and a second concave-convex structure arranged on the second stop portion and arranged axially, and the first concave-convex structure and the second concave-convex structure are axially plugged in.

[0023] Furthermore, the first liquid outlet includes a plurality of through holes, and the plurality of through holes are arranged on the tube wall of the outer tube along a spiral line;

[0024] Alternatively, at the same axial position, the number of through holes on the tube wall of the outer tube is at least two; and a plurality of through holes at the same axial position form a liquid outlet group, and along the axial direction, the number of the liquid outlet groups is at least two;

[0025] Alternatively, the first liquid outlet includes a first porous structure arranged on the wall of the outer tube, and the second liquid outlet includes a second porous structure; the number of through holes forming the first porous structure is greater than the number of through holes forming the second liquid outlet, and the arrangement of through holes forming the first porous structure covers the arrangement of through holes forming the second liquid outlet; when the through holes forming the second porous structure are aligned with the through holes forming the first porous structure, the outer tube discharges liquid in the arrangement of the second porous structure; when the inner tube is misaligned with the first liquid outlet and the second opening is in an open state, the outer tube discharges liquid in the arrangement of the first porous structure;

[0026] Alternatively, the first liquid outlet includes at least two first porous structures arranged on the wall of the outer tube, and the arrangement of the through holes forming the first porous structures in each of the first porous structures is different; the second liquid outlet includes a second porous structure, and the arrangement of the through holes forming the second liquid outlet can cover the arrangement of the through holes in all the first porous structures, so that the second porous structure can be aligned with any one of the first porous structures respectively.

[0027] Further, the outer tube is threadedly connected to the inner tube;

[0028] Alternatively, a limiting groove extending along the axial direction is provided on the outer wall of the inner tube, and a sliding block slidably connected to the limiting groove is provided on the inner wall of the outer tube; along the axial direction, the projection of the first stop portion toward the distal end surface of the inner tube completely covers the second opening, and the projection of the second stop portion toward the distal end surface of the outer tube completely covers the first opening, so that the inner tube can switch between the first state, the second state and the third state by sliding.

[0029] Furthermore, an indicator mark is provided on the inner tube and / or the outer tube to indicate the current state of the inner tube.

[0030] Furthermore, a lubricating material is coated between the outer surface of the inner tube and the inner surface of the outer tube.

[0031] The utility model has at least the following advantages or beneficial effects:

[0032] The thrombolytic catheter kit provided by the utility model comprises: an outer tube and an inner tube, wherein a first stopper is arranged inside the distal end of the outer tube, and the first stopper and the inner wall of the outer tube in the circumferential direction form a first opening; a first liquid outlet is arranged on the tube wall of the outer tube; a second stopper is arranged inside the distal end of the inner tube, and the second stopper and the inner wall of the inner tube in the circumferential direction form a second opening; a second liquid outlet is arranged on the tube wall of the inner tube; a liquid inlet is arranged on the inner tube; the inner tube is located inside the outer tube, and the two are coaxially arranged; the inner tube can move relative to the outer tube to a first state, a second state and a third state; in the first state, the first stopper The second stopper is completely offset from the second opening, and the second stopper is completely offset from the first opening; in the second state, the first stopper blocks a portion of the second opening, and the second stopper blocks a portion of the first opening; in the third state, the first stopper blocks the second opening, and the second stopper blocks the first opening; and in the second state and the third state, the first liquid outlet and the second liquid outlet are connected; the first stopper and the second stopper are respectively provided with interlocking structures, and the interlocking structures are used to lock the first stopper and the second stopper in the axial direction to reduce the deformation of the first stopper and the second stopper.

[0033] The operator can rotate or push and pull the inner tube to put the inner tube in the first state, at which time the first stopper is completely offset from the second opening, and the second stopper is completely offset from the first opening, that is, both the first opening and the second opening are in a fully open passage state, and the thrombolytic catheter kit can be used for high-pressure infusion of contrast agent, which is output from the distal end of the thrombolytic catheter kit. The operator can rotate or push and pull the inner tube again to put the inner tube in the second state, at which time the first stopper blocks a part of the second opening, and the second stopper blocks a part of the first opening, that is, a part of the first opening is open and a part is closed, and a part of the second opening is open and a part is closed; the liquid in the inner tube flows out from the first liquid outlet after passing through the second liquid outlet, and can be used for slow infusion of thrombolytic liquid, ensuring that the liquid flows out from the wall of the outer tube while allowing a small amount to leak out from the distal end of the outer tube, thereby reducing the risk of re-formation of thrombus at the distal end of the catheter caused by the clinical slow infusion process. The operator can also rotate or push and pull the inner tube again to put the inner tube in the third state. At this time, the first stopper blocks the second opening, the second stopper blocks the first opening, the first opening and the second opening are completely blocked to form a circuit break, and no liquid flows out of the distal end of the outer tube. The liquid in the inner tube flows out completely from the first liquid outlet, which can be used for mechanical continuous pumping, ensuring that the drug solution is most efficiently delivered to the target area during pumping. By rotating or pushing and pulling the inner tube, the thrombolytic catheter kit can be adapted to three different treatment methods, increasing the applicability of the thrombolytic catheter kit. In addition, since the first stopper and the second stopper are respectively provided with interlocking structures, they can be interlocked and connected together when they are close to each other. The interlocking structure is used to lock the first stopper and the second stopper in the axial direction, and the strength of the two is increased, thereby avoiding the deformation of the first stopper and the second stopper due to excessive internal hydraulic pressure, thereby causing leakage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a thrombolytic catheter kit in one state provided by an embodiment of the utility model;

[0036] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0037] Figure 3 A schematic diagram of another state of the thrombolytic catheter kit provided by an embodiment of the utility model;

[0038] Figure 4 for Figure 3 A partial enlarged view of position B in the middle;

[0039] Figure 5 A schematic diagram of a first state of a first thrombolytic catheter kit provided by an embodiment of the utility model;

[0040] Figure 6 A schematic diagram of a second state of a first thrombolytic catheter kit provided by an embodiment of the utility model;

[0041] Figure 7 A schematic diagram of a third state of the first thrombolytic catheter kit provided by an embodiment of the utility model;

[0042] Figure 8 A schematic diagram of a first state of a second thrombolytic catheter kit provided by an embodiment of the utility model;

[0043] Fig. 9 A schematic diagram of a second state of a second thrombolytic catheter kit provided by an embodiment of the utility model;

[0044] Fig.10 A schematic diagram of a third state of a second thrombolytic catheter kit provided by an embodiment of the utility model;

[0045] Fig.11 A schematic diagram of a first state of a third thrombolytic catheter kit provided by an embodiment of the utility model;

[0046] Fig.12 A schematic diagram of a second state of a third thrombolytic catheter kit provided by an embodiment of the utility model;

[0047] Fig.13 A schematic diagram of a third state of a third thrombolytic catheter kit provided by an embodiment of the utility model;

[0048] Fig.14 A schematic diagram of a first state of a fourth thrombolytic catheter kit provided by an embodiment of the utility model;

[0049] Fig.15 A schematic diagram of a fifth thrombolytic catheter kit provided by an embodiment of the utility model;

[0050] Fig.16 A schematic diagram of the distal end of the inner tube of a sixth thrombolytic catheter kit provided by an embodiment of the utility model;

[0051] Fig.17 A schematic diagram of the distal end of the outer tube of a sixth thrombolytic catheter kit provided by an embodiment of the utility model;

[0052] Fig.18A schematic diagram of the distal end of the outer tube of a seventh thrombolytic catheter kit provided by an embodiment of the utility model;

[0053] Fig.19 An expanded view of the outer tube of an eighth thrombolytic catheter kit provided by an embodiment of the utility model;

[0054] Fig. 20 An expanded view of the outer tube of the ninth thrombolytic catheter kit provided in an embodiment of the utility model;

[0055] Fig.21 An expanded view of the outer tube of the tenth thrombolytic catheter kit provided by an embodiment of the utility model;

[0056] Fig. 22 A schematic diagram of an eleventh thrombolytic catheter kit provided by an embodiment of the utility model;

[0057] Fig.23 A schematic diagram of a twelfth thrombolytic catheter kit provided by an embodiment of the utility model;

[0058] Fig.24 A schematic diagram of the distal end of the inner tube of a twelfth thrombolytic catheter kit provided by an embodiment of the utility model;

[0059] Fig.25 A schematic diagram of the distal end of the outer tube of a twelfth thrombolytic catheter kit provided by an embodiment of the utility model;

[0060] Fig.26 This is a schematic diagram of the thirteenth thrombolytic catheter kit provided in an embodiment of the utility model.

[0061] Icons: 100 - outer tube; 110 - first stopper; 111 - first stopper; 120 - first opening; 130 - first liquid outlet; 140 - second thread structure; 150 - front end of variable diameter; 160 - variable diameter section; 170 - rear section of variable diameter; 181 - annular structure; 182 - first protrusion unit; 183 - groove structure; 184 - spiral protrusion; 190 - slider;

[0062] 200 - inner tube; 210 - second stopper; 220 - second opening; 230 - liquid inlet; 240 - first thread structure; 250 - second protruding unit; 260 - second liquid outlet; 270 - limiting slide groove;

[0063] 310 - first lock buckle; 320 - second lock buckle; 410 - first concave-convex structure; 420 - second concave-convex structure. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0065] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0067] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0069] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] Particularly, in the present invention, during surgery, the end of the thrombolytic catheter kit close to the operator is the proximal end of the thrombolytic catheter kit, and conversely, the end away from the operator is the distal end.

[0071] like Figure 1 As shown, the thrombolytic catheter kit provided by the utility model includes: an outer tube 100 and an inner tube 200, the inner tube 200 is located inside the outer tube 100, the two are coaxially arranged, the outer diameter of the inner tube 200 is roughly equal to the inner diameter of the outer tube 100, or the outer diameter of the inner tube 200 is slightly smaller than the inner diameter of the outer tube 100, to avoid problems such as rotation or poor pushing and pulling. In order to facilitate observation of the structure of the outer tube 100 and the inner tube 200 in the accompanying drawings, the gap between the outer tube 100 and the inner tube 200 is enlarged.

[0072] like Figure 1 and Figure 2 As shown, a first stopper 110 is provided inside the distal end of the outer tube 100, and the first stopper 110 and the inner wall of the outer tube 100 in the circumferential direction thereof form a first opening 120. A first liquid outlet 130 is provided on the tube wall of the outer tube 100, and the first liquid outlet 130 is provided between the first stopper 110 and the proximal end of the outer tube 100. The first liquid outlet 130 may be a single opening, or may be composed of a plurality of holes or slits.

[0073] like Figure 2 As shown, a second stopper 210 is provided inside the distal end of the inner tube 200, and the second stopper 210 and the inner wall of the inner tube 200 in the circumferential direction thereof form a second opening 220, which serves as an opening for liquid output or guide wire. The second stopper 210 can be complementary to the first opening 120, and the second opening 220 can be complementary to the first stopper 110, where complementary means that the shapes and sizes are exactly the same. A second liquid outlet 260 is provided on the tube wall of the inner tube 200, and the second liquid outlet 260 can lead the liquid inside the inner tube 200 to the outside of the inner tube 200.

[0074] like Figure 1 As shown, a liquid inlet 230 is disposed at the proximal end of the inner tube 200 . The number of the liquid inlet 230 may be, but is not limited to, one, two or three. The liquid inlet 230 is used to connect to a drug delivery device.

[0075] The inner tube 200 can be switched between the first state, the second state and the third state by rotation or by pushing and pulling.

[0076] like Figure 5As shown, the operator can rotate the inner tube 200 to put the inner tube 200 in the first state, at this time, the first stop portion 110 is completely staggered with the second opening 220, and the second stop portion 210 is completely staggered with the first opening 120, that is, the first stop portion 110 and the second stop portion 210 overlap, and the first opening 120 and the second opening 220 are both in a fully open passage state; and the first liquid outlet 130 and the second liquid outlet 260 can be completely staggered, or the first liquid outlet 130 and the second liquid outlet 260 at least partially overlap, that is, the liquid in the inner tube 200 cannot or rarely flows out of the first liquid outlet 130 through the second liquid outlet 260, and the thrombolytic catheter kit can be used for high-pressure infusion of contrast agents.

[0077] like Figure 6 As shown, the operator can rotate the inner tube 200 again to put the inner tube 200 in the second state. At this time, the first stopper 110 blocks a part of the second opening 220, and the second stopper 210 blocks a part of the first opening 120, that is, a part of the first opening 120 is opened and a part is closed, and a part of the second opening 220 is opened and a part is closed; the first liquid outlet 130 overlaps with a part of the second liquid outlet 260, that is, the liquid in the inner tube 200 can also flow out from the first liquid outlet 130 overlapping with it through the second liquid outlet 260, which can be used for slow infusion of thrombolytic liquid, ensuring that the liquid flows out from the wall of the outer tube 100, while allowing a small amount to leak out from the distal end of the outer tube 100, thereby reducing the risk of re-thrombosis at the distal end of the catheter caused by the clinical slow infusion process. Among them, when the inner tube 200 of the thrombolytic catheter kit is in the second state, the overlapping open area of ​​the first opening 120 and the second opening 220 can be 1 / 100-1 / 10 of the inner cross-sectional area of ​​the outer tube 100.

[0078] like Figure 7 As shown, the operator can rotate the inner tube 200 again to put the inner tube 200 in the third state, at which time the first stopper 110 blocks the second opening 220, the second stopper 210 blocks the first opening 120, the first opening 120 and the second opening 220 are completely blocked to form a circuit break, and no liquid flows out of the distal end of the outer tube 100. The first liquid outlet 130 and the second liquid outlet 260 can be completely aligned, and the liquid in the inner tube 200 completely flows out from the first liquid outlet 130, which can be used for mechanical continuous pumping (pressure is usually 100kPa-1000kPa), ensuring that the drug solution is most efficiently delivered to the target area during pumping.

[0079] In summary, by rotating the inner tube 200, the thrombolytic catheter kit can be adapted to three different treatment methods, thereby increasing the applicability of the thrombolytic catheter kit.

[0080] In one possible implementation, Figure 8 - Fig.10As shown, the first stopper 110 can be a complete valve, such as a semicircular valve, with an area of ​​half the cross-sectional area of ​​the outer tube 100 at the setting position. Similarly, the second stopper 210 is set in the same manner.

[0081] In another possible solution, Fig.11 - Fig.13 As shown, the first stopper 110 may include at least two first stoppers 111 arranged circumferentially, the first stoppers 111 are valves, and the circumferentially arranged first stoppers 111 may be arranged continuously or at intervals. Similarly, the second stopper 210 is arranged in the same manner.

[0082] Among other possible solutions, Fig.14 As shown, the first stopper 110 and the second stopper 210 may be irregular shapes, as long as the second stopper 210 is complementary to the first opening 120 , and the second opening 220 is complementary to the first stopper 110 .

[0083] like Figure 1 - Figure 4 As shown, the inner tube 200 can move axially relative to the outer tube 100 in a spiral manner. In this embodiment, the proximal end of the inner tube 200 has a first thread structure 240, and the proximal end of the outer tube 100 has a second thread structure 140, so that the two are threadedly connected, and the inner tube 200 rotates relative to the outer tube 100 and moves axially at the same time.

[0084] Among other possible solutions, Fig.26 As shown, the outer tube 100 and the inner tube 200 can also realize axial movement through the limiting sliding groove 270 and the sliding block 190. Specifically, the outer wall of the inner tube 200 is provided with a limiting sliding groove 270 extending along the axial direction thereof, and the inner wall of the outer tube 100 is provided with a sliding block 190 slidably connected to the limiting sliding groove 270; along the axial direction, the projection of the first stopper 110 toward the distal end surface of the inner tube 200 completely covers the second opening 220, and the projection of the second stopper 210 toward the distal end surface of the outer tube 100 completely covers the first opening 120. When in use, the operator can switch the state by pushing and pulling the inner tube 200. For example, the operator can push the inner tube 200 to the extreme position toward the distal end. At this time, the first stopper 110 completely blocks the second opening 220, and the second stopper 210 completely blocks the first opening 120, and the inner tube 200 is in the third state. After slightly pulling the inner tube 200 toward the proximal end, the first opening 120 and the second opening 220 gradually open from the blocked state, and the inner tube 200 is in the second state. After continuously pulling the inner tube 200 toward the proximal end, the first opening 120 and the second opening 220 can be completely opened, and the inner tube 200 is in the first state.

[0085] like Figure 2 As shown, the distal end of the outer tube 100 may have a tapered structure to facilitate the implantation of the thrombolytic catheter kit. The tapered structure includes a variable diameter front end 150, a variable diameter section 160 and a variable diameter rear section 170 connected in sequence from the proximal end to the distal end, and the inner diameter of the variable diameter front end 150 is greater than the inner diameter of the variable diameter rear section 170. The variable diameter section 160 or the connection between the variable diameter section 160 and the variable diameter rear section 170 is provided with a positioning protrusion protruding inward, and the positioning protrusion is used to abut against the outer side wall of the distal end of the inner tube 200. The positioning protrusion can be continuous or discontinuous. Through the simple design of the inner and outer tube 100 joints and the unique positioning protrusion positioning design of the distal end of the outer tube 100, when the inner tube 200 is slid or rotated, the inner tube 200 and the outer tube 100 are relatively displaced in the axial or radial direction, and the distal ends of the inner tube 200 and the outer tube 100 are accurately docked or returned, and the operation is simple.

[0086] In one possible implementation, Figure 4 As shown, the positioning protrusion is a continuous annular structure 181 arranged along the circumferential direction. The annular positioning protrusion is coaxially arranged with the outer tube 100. The inner diameter of the positioning protrusion is smaller than the outer diameter of the distal end of the inner tube 200. The inner tube 200 can be inserted into the inner side of the positioning protrusion and abut against the positioning protrusion to form a seal.

[0087] In another possible implementation, Fig.15 - Fig.17 As shown, the positioning protrusion includes at least two first protrusion units 182 arranged at intervals along the circumferential direction, and a groove structure 183 is formed between two adjacent first protrusion units 182. A second protrusion unit 250 for correspondingly plugging with the groove structure 183 is arranged on the outer side wall of the distal end of the inner tube 200. The inner tube 200 is moved axially, so that the second protrusion unit 250 can enter the groove structure 183. At this time, the outer diameter of the inner tube 200 is consistent with the inner diameter of the variable diameter rear section 170. When the working state of the inner tube 200 needs to be switched, the inner tube 200 can be moved toward the proximal end first, then rotated by a certain angle, and then moved toward the distal end again, so that the second protrusion unit 250 is plugged with another groove structure 183. The groove structure 183 prevents the inner tube 200 from rotating, which has the function of locking the current state of the inner tube 200.

[0088] In another feasible solution, Fig.18As shown, the inner tube 200 can rotate relative to the outer tube 100, and the positioning protrusion includes a spiral protrusion 184 extending in an axial spiral direction, and from the proximal end to the distal end, the distance between the top of the spiral protrusion 184 and the axis of the outer tube 100 gradually decreases. The spiral protrusion 184 can be connected by a plurality of spiral protrusion segments connected end to end in sequence. Specifically, from the proximal end to the distal end, it can be three spiral protrusion segments L1, spiral protrusion segment L2 and spiral protrusion segment L3 arranged in sequence along the axial direction. The inner diameters of the spiral protrusion segments L1, spiral protrusion segment L2 and spiral protrusion segment L3 gradually decrease. The distal end of the inner tube 200 first enters the spiral protrusion segment L1, and the inner tube 200 is in the first state. When the distal end spiral of the inner tube 200 enters the spiral protrusion segment L2, the inner tube 200 is in the second state. When the distal end spiral of the inner tube 200 enters the spiral protrusion segment L3, the inner tube 200 is in the third state.

[0089] In order to improve the safety during rapid pumping, the first stopper 110 and the second stopper 210 are respectively provided with an interlocking structure, which is used to lock the first stopper 110 and the second stopper 210 in the axial direction to reduce the deformation of the first stopper 110 and the second stopper 210 due to excessive pressure. It can improve the efficiency and safety of liquid injection during mechanical pumping, speed up the operation time, reduce the operation cost, and make the operation faster and more convenient.

[0090] In an operative solution, the interlocking structure includes a first magnet disposed on the first stopper 110 and a second magnet disposed on the second stopper 210. When the first stopper 110 and the second stopper 210 are attached together, the first magnet and the second magnet are attracted together, and the first stopper 110 and the second stopper 210 can increase their respective strengths after being connected.

[0091] In another possible implementation, Fig. 22 As shown, the inner tube 200 can rotate relative to the outer tube 100, and the interlocking structure includes a first lock buckle 310 provided on the first stopper 110, and a second lock buckle 320 provided on the second stopper 210, and the first lock buckle 310 and the second lock buckle 320 are locked by rotation. The first lock buckle 310 and the second lock buckle 320 can be groove-shaped, and the inner tube 200 can be rotated to make the second lock buckle 320 and the first lock buckle 310 buckle together, thereby preventing the first stopper 110 and the second stopper 210 from moving in the axial direction, and the stopping stability is higher.

[0092] In another feasible solution, Fig.23 - Fig.25As shown, the inner tube 200 can move axially relative to the outer tube 100, and the interlocking structure includes a first concave-convex structure 410 provided on the first stopper 110 and provided in the axial direction, and a second concave-convex structure 420 provided on the second stopper 210 and provided in the axial direction. Specifically, the first concave-convex structure 410 can be a protrusion provided on the first stopper 110, and the second concave-convex structure 420 can be a plug hole provided on the second stopper 210. When the inner tube 200 is inserted axially to the distal end, the first concave-convex structure 410 on the inner tube 200 can be inserted into the second concave-convex structure 420 on the outer tube 100, so as to realize the connection between the first stopper 110 and the second stopper 210. After the first stopper 110 and the second stopper 210 are connected, the strength of each can be increased.

[0093] The shapes and arrangements of the first liquid outlet 130 and the second liquid outlet 260 may be the same or different.

[0094] In one possible implementation, Fig.19 As shown, the first liquid outlet 130 includes a plurality of through holes, which may be round holes or strip-shaped slits. The first liquid outlet 130 and the second liquid outlet 260 may have the same shape and arrangement, and the plurality of through holes are arranged on the tube wall of the outer tube 100 along a spiral line. When the first liquid outlet 130 and the second liquid outlet 260 are aligned, the purpose of spraying the clinical liquid in the spiral line direction is met.

[0095] In another possible implementation, at the same axial position, the number of through holes on the tube wall of the outer tube 100 is at least two, for example, four. And multiple through holes at the same axial position form a liquid outlet group, and along the axial direction, the number of liquid outlet groups is at least two. The shape and arrangement of the first liquid outlet 130 and the second liquid outlet 260 can be the same. Specifically, the positions of the through holes in the two adjacent liquid outlet groups in the axial direction are axially aligned, so as to meet the purpose of 90-degree injection of clinical liquid in the circumferential direction, such as Fig. 20 The positions of the through holes in two adjacent groups of liquid outlets in the axial direction can also be staggered in the axial direction, so as to meet the purpose of 360-degree circumferential injection of clinical liquids, such as Fig.21 shown.

[0096] In another embodiment, the first liquid outlet 130 includes a first porous structure disposed on the wall of the outer tube 100, and the second liquid outlet 260 includes a second porous structure. The number of through holes forming the first porous structure is greater than the number of through holes forming the second liquid outlet, and the arrangement of through holes forming the first porous structure covers the arrangement of through holes forming the second liquid outlet. Wherein, covering means that the through holes forming the first porous structure can form a pattern including the pattern of the second liquid outlet through selective selection and combination, for example, some through holes in the first porous structure are closed, and the remaining through holes can form a 90-degree spray in the circumferential direction after being connected, and the arrangement of through holes of the second liquid outlet is exactly the arrangement of the remaining through holes. When the through holes forming the second porous structure are all aligned with the through holes forming the first porous structure, the outer tube 100 discharges liquid in the arrangement of the second porous structure, for example, the above-mentioned 90-degree spray in the circumferential direction. By pulling the inner tube 200 toward the proximal end so that the inner tube 200 is misaligned with the first liquid outlet 130 and the second opening 220 is in an open state, the liquid in the inner tube 200 is completely output from the distal end to the outer tube 100, and the outer tube 100 discharges the liquid in the arrangement form of the first porous structure.

[0097] In another practicable solution, the first liquid outlet 130 includes at least two first porous structures disposed on the tube wall of the outer tube 100, and the arrangement of the through holes forming the first porous structure is different in each first porous structure, so that after the different first porous structures are connected, the liquid discharge forms are different, for example, the liquid discharge in the spiral direction, the liquid discharge at 90 degrees in the circumferential direction, the liquid discharge at 360 degrees in the circumference, the liquid discharge at one side, etc. The second liquid outlet includes a second porous structure, and the arrangement of the through holes forming the second liquid outlet can cover the arrangement of the through holes in all the first porous structures, so that the second porous structure can be aligned with any of the first porous structures, and it should be noted that when the second porous structure is aligned with one of the first porous structures, the second porous structure does not overlap with the other first porous structures, and when switching, only after completely crossing the current first porous structure can it be aligned with the next first porous structure, so that the continuous change of the liquid discharge state can be achieved.

[0098] The inner tube 200 and / or the outer tube 100 are provided with indication marks for indicating the current state of the inner tube 200. For example, marks A, B and C representing "first state", "second state" and "third state" are provided on the outer tube 100, respectively, and A, B and C are arranged along the circumferential direction, while an arrow is provided on the inner tube 200, and the current state of the inner tube 200 can be judged by checking the direction of the arrow.

[0099] A lubricating material is coated between the outer surface of the inner tube 200 and the inner surface of the outer tube 100. The materials known in the prior art that meet biocompatibility and have lubricating properties, such as hydrophilic coatings, silicone oil coatings, etc., increase the sliding performance between the two.

[0100] In order to facilitate the catheter to pass through the tortuous blood vessels to reach the thrombus, the outer tube 100 and the inner tube 200 are made of flexible materials, and the first stopper 110 and the second stopper 210 are also made of flexible materials. Therefore, an interlocking structure needs to be provided between the first stopper 110 and the second stopper 210 to avoid leakage caused by excessive internal pressure. The first stopper 110 and the second stopper 210 are usually medical polymer materials commonly used in the prior art, such as silicone, TPU, pebax, nylon, or composite materials.

[0101] The coreless design of the thrombolytic catheter kit eliminates the risk of foreign body embolism caused by the withdrawal of the guidewire in the prior art surgery.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A thrombolytic catheter kit, It is characterized in that include: An outer tube (100), wherein a first stopper (110) is disposed inside the distal end of the outer tube (100), and the first stopper (110) and the inner wall of the outer tube (100) in the circumferential direction thereof form a first opening (120); and a first liquid outlet (130) is disposed on the tube wall of the outer tube (100); An inner tube (200), wherein a second stopper (210) is disposed inside the distal end of the inner tube (200), and the second stopper (210) and the inner wall of the inner tube (200) in the circumferential direction thereof form a second opening (220); a second liquid outlet (260) is disposed on the tube wall of the inner tube (200); and a liquid inlet (230) is disposed on the inner tube (200); The inner tube (200) is located inside the outer tube (100), and the two are coaxially arranged; The inner tube (200) is capable of moving relative to the outer tube (100) to a first state, a second state, and a third state; In the first state, the first stopper (110) and the second opening (220) are completely offset, and the second stopper (210) and the first opening (120) are completely offset; In the second state, the first stopper (110) blocks a portion of the second opening (220), and the second stopper (210) blocks a portion of the first opening (120); In the third state, the first stopper (110) blocks the second opening (220), and the second stopper (210) blocks the first opening (120); In the second state and the third state, the first liquid outlet (130) and the second liquid outlet (260) are connected; The first stop portion (110) and the second stop portion (210) are respectively provided with an interlocking structure, and the interlocking structure is used to lock the first stop portion (110) and the second stop portion (210) in the axial direction to reduce the deformation of the first stop portion (110) and the second stop portion (210).

2. The thrombolytic catheter kit according to claim 1, It is characterized in that The first stopper (110) includes at least two first stoppers (111) arranged along the circumferential direction, and / or the second stopper (210) includes at least two second stoppers arranged along the circumferential direction at intervals.

3. The thrombolytic catheter kit according to claim 1, It is characterized in that The inner tube (200) is capable of axially moving relative to the outer tube (100); The inner side wall of the outer tube (100) is provided with a positioning protrusion protruding inwardly, and the positioning protrusion is used to abut against the outer side wall of the distal end of the inner tube (200).

4. The thrombolytic catheter kit according to claim 3, It is characterized in that The positioning protrusion is annular, and the annular positioning protrusion is coaxially arranged with the outer tube (100); Alternatively, the positioning protrusion comprises at least two first protrusion units (182) arranged at intervals along the circumferential direction, a groove structure (183) is formed between two adjacent first protrusion units (182), and a second protrusion unit (250) for correspondingly plugging into the groove structure (183) is provided on the outer side wall of the distal end of the inner tube (200); Alternatively, the inner tube (200) is rotatable relative to the outer tube (100), and the positioning protrusion includes a spiral protrusion (184) extending in an axial spiral direction, and from the proximal end to the distal end, the distance between the top of the spiral protrusion (184) and the axis of the outer tube (100) gradually decreases.

5. The thrombolytic catheter kit according to claim 4, It is characterized in that The interlocking structure comprises a first magnet arranged on the first stopper (110), and a second magnet arranged on the second stopper (210); Alternatively, the inner tube (200) is rotatable relative to the outer tube (100), and the interlocking structure comprises a first lock buckle (310) arranged on the first stopper (110), and a second lock buckle (320) arranged on the second stopper (210), and the first lock buckle (310) and the second lock buckle (320) are locked by rotation; Alternatively, the inner tube (200) is capable of axially moving relative to the outer tube (100), and the interlocking structure includes a first concave-convex structure (410) arranged on the first stopper (110) and arranged along the axial direction, and a second concave-convex structure (420) arranged on the second stopper (210) and arranged along the axial direction, and the first concave-convex structure (410) and the second concave-convex structure (420) are plugged in along the axial direction.

6. The thrombolytic catheter kit according to any one of claims 1 to 5, It is characterized in that The first liquid outlet (130) comprises a plurality of through holes, and the plurality of through holes are arranged along a spiral line on the tube wall of the outer tube (100); Alternatively, at the same axial position, the number of through holes on the tube wall of the outer tube (100) is at least two; and a plurality of through holes at the same axial position form a liquid outlet group, and along the axial direction, the number of the liquid outlet groups is at least two; Alternatively, the first liquid outlet (130) comprises a first porous structure arranged on the tube wall of the outer tube (100), and the second liquid outlet (260) comprises a second porous structure; the number of through holes forming the first porous structure is greater than the number of through holes forming the second liquid outlet, and the arrangement of through holes forming the first porous structure covers the arrangement of through holes forming the second liquid outlet; when the through holes forming the second porous structure are aligned with the through holes forming the first porous structure, the outer tube (100) discharges liquid in the arrangement of the second porous structure; when the inner tube (200) is misaligned with the first liquid outlet (130) and the second opening (220) is in an open state, the outer tube (100) discharges liquid in the arrangement of the first porous structure; Alternatively, the first liquid outlet (130) includes at least two first porous structures arranged on the wall of the outer tube (100), and the arrangement of through holes forming the first porous structures in each of the first porous structures is different; the second liquid outlet includes a second porous structure, and the arrangement of through holes forming the second liquid outlet can cover the arrangement of through holes in all the first porous structures, so that the second porous structure can be aligned with any one of the first porous structures respectively.

7. The thrombolytic catheter kit according to any one of claims 1 to 3, It is characterized in that The outer tube (100) is threadedly connected to the inner tube (200); Alternatively, a limiting sliding groove (270) extending along the axial direction is provided on the outer wall of the inner tube (200), and a sliding block (190) slidably connected to the limiting sliding groove (270) is provided on the inner wall of the outer tube (100); along the axial direction, the projection of the first stop portion (110) toward the distal end surface of the inner tube (200) completely covers the second opening (220), and the projection of the second stop portion (210) toward the distal end surface of the outer tube (100) completely covers the first opening (120), so that the inner tube (200) can switch between the first state, the second state and the third state by sliding.

8. The thrombolytic catheter kit according to any one of claims 1 to 5, It is characterized in that The inner tube (200) and / or the outer tube (100) are provided with an indication mark for indicating the current state of the inner tube (200).

9. The thrombolytic catheter kit according to any one of claims 1 to 5, It is characterized in that A lubricating material is coated between the outer surface of the inner tube (200) and the inner surface of the outer tube (100).

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