Vascular embolism stripping and suction catheter system
By using a vascular embolization and aspiration catheter system, combined with the traction lumen and negative pressure lumen within the catheter, the thrombus can be cut and aspirated, solving the problem of the difficulty in effectively removing vascular emboli in existing technologies and simplifying the embolization removal process.
Patent Information
- Application Number
- CN202422790758.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In existing technologies, single methods such as drug-induced thrombolysis or stent retrieval are insufficient to effectively remove vascular embolisms of different types, resulting in poor treatment outcomes.
A vascular embolization stripping and aspiration catheter system was designed, comprising a catheter, a compressible and self-expanding thrombus cutter and stripper, and a traction wire. Combined with negative pressure aspiration, the thrombus is cut and aspirated through the traction lumen and negative pressure lumen within the catheter.
It achieves effective cutting and fragmentation of thrombi, simplifies the embolization removal process by using negative pressure aspiration, and has a simple structural design with remarkable effects.
Smart Images
Figure CN223799813U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, especially a kind of blood vessel embolism stripping and suction catheter system. BACKGROUND
[0002] With age, the originally healthy blood vessels of human body will gradually age and become "fragile", and the deposition of embolus and other impurities in the blood vessels causes the blood vessels to appear stenosis, and in severe cases, even causes the blood vessels to be completely blocked or occluded, leading to the tissues and organs of the body to lose function and necrosis due to ischemia. In particular, pulmonary embolism patients can have clinical manifestations from asymptomatic to sudden death. Common symptoms are dyspnea and chest pain, with an incidence rate of more than 80%, which can seriously endanger the life safety of patients.
[0003] In clinical practice, methods such as drug thrombolysis, intraluminal balloon dilation catheter intervention, and intraluminal thrombus removal stent are commonly used to treat blood vessel blockage or stenosis. Among them, the application of interventional thrombectomy to dilate the blocked blood vessels is a treatment option with small trauma and significant efficacy, which is recommended by many clinical doctors. However, at present, due to the different properties of embolism, single drug thrombolysis or thrombus removal stent is difficult to achieve good thrombus removal effect.
[0004] Therefore, a blood vessel embolism stripping and suction catheter system is developed, which uses a thrombus cutting and stripping device to effectively cut and strip the embolism, and then cooperates with negative pressure suction to achieve very good thrombus removal effect. SUMMARY
[0005] The technical problem to be solved by the utility model is to provide a blood vessel embolism stripping and suction catheter system that effectively overcomes the defects of the prior art.
[0006] The technical solution for solving the above technical problem is as follows:
[0007] A blood vessel embolism stripping and suction catheter system, comprising a catheter, a compressible and self-expandable thrombus cutting and stripping device, and a traction wire, wherein the catheter has a traction lumen and a negative pressure lumen inside along its length direction, the traction wire passes through the traction lumen, one end of the traction wire is connected to the thrombus cutting and stripping device, and the other end of the traction wire passes out from the other end of the catheter, the thrombus cutting and stripping device can be compressed and installed inside the traction lumen, or released in a self-expanding manner outside one end of the catheter, and the other end of the catheter is provided with a negative pressure connector in communication with the negative pressure lumen.
[0008] On the basis of the above technical solution, the utility model can also be improved as follows.
[0009] Further, the other end of the catheter is connected with a push handle.
[0010] Further, the thrombus cutting and stripping device comprises an umbrella-shaped stent formed by braiding a nickel-titanium alloy wire.
[0011] Further, the thrombus cutting and stripping device comprises a plurality of skeleton wires which are distributed in a circumferential direction, one end of the skeleton wires is gathered and riveted to form a first riveted joint, one end of the traction wire is connected to the first riveted joint, the other end of the skeleton wires is bent, and the end portion is gathered and riveted in the central region of the other end of the plurality of skeleton wires to form a second riveted joint.
[0012] Further, the skeleton wires are nickel-titanium alloy wires.
[0013] Further, the first riveted joint and the second riveted joint are connected by a wire.
[0014] Further, the second riveted joint is connected with a guide tube column in the form of a hook in a normal state, and the guide tube column can be deformed into a straight strip and placed in the traction cavity.
[0015] Further, the inner side or the outer side of the plurality of skeleton wires is collectively attached with a membrane capable of transmitting blood.
[0016] Further, the other end of the traction wire is connected with a pull ring.
[0017] Further, one end of the negative pressure cavity is provided with a flexible suction head in the form of a flared opening.
[0018] The beneficial effects of the present application are: simple and reasonable structure design, which can effectively cut and crush the mural thrombus, and then use negative pressure suction to take out the mural thrombus, so that the mural thrombus is taken out more simply. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 FIG. 1 is a structural schematic view of a vascular thrombus stripping and suction catheter system according to the present application;
[0020] Figure 2 FIG. 2 is a structural schematic view of another embodiment of the vascular thrombus stripping and suction catheter system according to the present application.
[0021] In the drawings, the components represented by the respective reference numerals are listed as follows:
[0022] 1, catheter; 2, thrombus cutting and stripping device; 3, traction wire; 4, flexible suction head; 11, traction cavity; 12, negative pressure cavity; 13, negative pressure joint; 14, push handle; 21, skeleton wire; 22, guide tube column; 23, membrane; 31, pull ring. DETAILED DESCRIPTION
[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0024] Example: Figure 1 As shown, the vascular embolization stripping and aspiration catheter system of this embodiment includes a catheter 1, a compressible and self-expanding thrombectomy stripper 2, and a traction wire 3. The catheter 1 has a traction chamber 11 and a negative pressure chamber 12 along its length. The traction wire 3 passes through the traction chamber 11, and one end is connected to the thrombectomy stripper 2, while the other end passes through the other end of the catheter 1. The thrombectomy stripper 2 can be compressed and installed inside one end of the traction chamber 11, or released outside one end of the catheter 1. The other end of the catheter 1 is provided with a negative pressure connector 13 that communicates with the negative pressure chamber 12.
[0025] In this embodiment, the thrombectomy and aspiration catheter system is used by first storing the thrombectomy device 2 in one end of the traction chamber 11 of the catheter 1 through a pre-loading / compression method. The entire catheter is then inserted into the patient's body along with the delivery sheath and reaches the target location along the blood vessel. After the guidewire or microcatheter punctures the embolism (thrombus) at the target location at one end of the catheter 1, the thrombectomy device 2 is released outside one end of the catheter 1 (that is, the thrombectomy device 2 is released outside the thrombus; of course, it can also be released inside the thrombus). Then, the other end of the traction wire 3 is pulled back and forth or rotated, so that the released thrombectomy device 2 repeatedly "cuts" the embolism, thereby cutting and breaking the embolism. After this operation has been performed for a period of time, the negative pressure connector 13 is connected to an external negative pressure device (which can be pre-connected). The negative pressure device generates a negative pressure suction force at one end of the negative pressure chamber 12, thereby aspirating the thrombus that has been cut and broken by the thrombectomy device 2. The entire structure is simple and reasonable, and can effectively "cut" and break up the attached embolism, and then use negative pressure to extract it, making the removal of the embolism simpler.
[0026] It should be further explained that after catheter 1 enters the blood vessel and approaches the thrombus, the thrombus cutter 2 at its distal end is pushed into and through the thrombus by the external manipulation traction wire 3. During this process, the thrombus cutter 2 does not necessarily have to penetrate the thrombus. During the penetration process, the thrombus cutter 2 may be released. During the release process, the thrombus cutter 2 can be partially cut and broken by pushing and pulling the traction wire 3. Combined with the negative pressure suction at the distal end of catheter 1, the broken thrombus can be extracted in time. Then, the traction wire 3 can be pulled outward to make the thrombus cutter 2 re-contract and tighten the distal end of catheter 1. Then, the catheter 1 is pushed forward a short distance. After that, the above operation is repeated to completely remove the thrombus.
[0027] In this embodiment, the other end of the conduit 1 is connected to a push handle 14. The push handle 14 can be a tubular component, one end of which is connected and communicates with the other end of the conduit 1. The push handle 14 has a flow channel that communicates with the negative pressure chamber 12. The side wall of the push handle 14 has an interface that communicates with the other end of the traction chamber 11. The other end of the traction wire 3 passes through the interface.
[0028] In this embodiment, the push handle 14 has a branch interface on its side wall, and a negative pressure connector 13 is provided at the end away from the conduit 1.
[0029] In a preferred embodiment, the thrombus cutter / eliminater 2 comprises an umbrella-shaped support formed of nickel-titanium alloy wire, which is larger at one end and smaller at the other after release.
[0030] In the above implementation scheme, after the thrombus cutter 2 is released, one end connected to the traction wire 3 is thin and the other end gradually becomes larger. During the traction process, the thrombus cutter 2 will have an effective "cutting" effect on the thrombus formation.
[0031] In a preferred embodiment, the thrombus cutting and stripping device 2 includes a plurality of skeleton wires 21 spaced apart in the circumferential direction. One end of the skeleton wires 21 is gathered and riveted to form a first rivet joint. One end of the traction wire 3 is connected to the first rivet joint. The other end of the skeleton wires 21 is bent, and the end is gathered and riveted in the central area of the other end of the plurality of skeleton wires 21 to form a second rivet joint.
[0032] In the above implementation scheme, the multiple skeleton wires 21 are designed in a petal shape, with one end small and the other end large when connected to the traction wire 3. During the back-and-forth pulling process, the multiple skeleton wires 21 can effectively "cut" the thrombus.
[0033] In this embodiment, the skeleton wire 21 is made of medical-grade nickel-titanium alloy wire.
[0034] In this embodiment, the first riveting head and the second riveting head are connected by a wire.
[0035] As a preferred implementation method, such as Figure 2 As shown, the second rivet joint is connected to a guide post 22 that is conventionally hook-shaped. The guide post 22 can be deformed into a straight strip and is built into the traction cavity 11.
[0036] In the above embodiment, since the thrombus cutting stripper 2 has a back-and-forth moving state during operation in the blood vessel, the flexible guide tube column 22 in the end connected with the second riveting head in a hook shape can play a safety protection role, avoiding the problem that the other end of the thrombus cutting stripper 2 can pierce the blood vessel wall during back-and-forth pulling.
[0037] As a preferred embodiment, the inner side or the outer side of the other end of the plurality of skeleton wires 21 is collectively attached with a membrane 23 capable of permeating blood.
[0038] In the above embodiment, the membrane 23 is designed to normally permeate blood, but intercept the thrombus pieces cut by the thrombus cutting stripper 2, avoiding the thrombus from wandering to other parts in the blood vessel, playing a role of capturing the thrombus to a certain extent, and being beneficial to subsequent negative pressure suction.
[0039] As a preferred embodiment, the other end of the traction wire 3 is connected with a pull ring 31.
[0040] In the above embodiment, the pull ring 31 is designed to facilitate the traction force of the traction wire 3.
[0041] As a preferred embodiment, one end of the negative pressure cavity 12 is provided with a flexible suction head 4 in a flared shape.
[0042] In the above embodiment, the flexible suction head 4 adopts a silica gel head, and the flared shape is beneficial to the suction of the thrombus pieces.
[0043] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0044] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0045] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction of two elements, unless another definite limitation.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0046] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction of two elements, unless another definite limitation.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0047] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.And, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.
[0048] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.
Claims
1. An embolization debulking and aspiration catheter system, comprising: The application relates to a catheter (1), a compressible and self-expanding thrombectomy stripper (2) and a traction wire (3), wherein the catheter (1) is internally provided with a traction cavity (11) and a negative pressure cavity (12) along the length direction of the catheter (1), the traction wire (3) passes through the traction cavity (11) and is connected with the thrombectomy stripper (2) at one end and is led out from the other end of the catheter (1), the thrombectomy stripper (2) can be compressed and arranged in the traction cavity (11) or is released in a self-expanding mode at one end of the catheter (1), and the other end of the catheter (1) is provided with a negative pressure connector (13) communicated with the negative pressure cavity (12); the thrombectomy stripper (2) comprises a support shaped like an umbrella with a large one end and a small other end and made of a nickel-titanium alloy wire. The thrombectomy stripper (2) comprises a plurality of skeleton wires (21) distributed in a circumferential direction, one end of the skeleton wire (21) is gathered and riveted to form a first rivet joint, one end of the traction wire (3) is connected with the first rivet joint, the other end of the skeleton wire (21) is bent, and the end part is gathered and riveted in the central area of the other end of the plurality of skeleton wires (21) to form a second rivet joint.
2. An embolization and aspiration catheter system according to claim 1, wherein: The other end of the catheter (1) is connected with a pushing handle (14).
3. An embolization and aspiration catheter system according to claim 1, wherein: The skeleton wire (21) is a nickel-titanium alloy wire.
4. The vascular embolization dissection and aspiration catheter system of claim 1, wherein: The first rivet joint and the second rivet joint are connected through a wire.
5. The vascular embolization dissection and aspiration catheter system of claim 1, wherein: The second rivet joint is connected with a guide tube column (22) in the form of a hook in a normal state, the guide tube column (22) can be deformed into a straight strip and is arranged in the traction cavity (11).
6. An embolization and aspiration catheter system according to claim 1, wherein: The inner side or the outer side of the plurality of skeleton wires (21) is collectively attached with a membrane (23) capable of transmitting blood.
7. An embolization and aspiration catheter system according to claim 1, wherein: The other end of the traction wire (3) is connected with a pull ring (31).
8. An embolization and aspiration catheter system according to any one of claims 1 to 7, wherein: One end of the negative pressure cavity (12) is provided with a flexible suction head (4) in the form of a bell mouth. The other end of the traction wire (3) is connected with a pull ring (31).