Thrombus aspiration catheter with high stability

Abstract

The thrombus aspiration catheter with the high stability comprises a hollow catheter body, one end of the catheter body is provided with a negative pressure end connected to an external negative pressure component and a sealing end connected with a hollow guide wire tube, and the guide wire tube penetrates through the sealing end and extends to an aspiration end arranged at the other end of the catheter body. A negative pressure hole is formed in the side, close to the negative pressure end, of the guide wire tube, the end, close to the suction end, of the guide wire tube is connected with a thrombus breaking component, an adsorption part is arranged at the joint of the thrombus breaking component and the guide wire tube, a plurality of adsorption holes are formed in the circumferential direction of the adsorption part, and the negative pressure hole is connected with the adsorption holes through a connecting channel arranged in an inner cavity of the guide wire tube. Therefore, thrombus broken by the thrombus breaking component can be adsorbed conveniently. After the thrombus breaking component rotates, a large thrombus can be broken into a small thrombus, the large thrombus is prevented from blocking a catheter and a blood vessel, the thrombus suction effect is improved, the thrombus suction stability of the catheter is improved, and the suction operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a thrombus aspiration catheter with high stability. Background Art

[0002] In the medical field, blood vessels in the human body are often blocked by the presence of blood clots, and blood clots in cerebral blood vessels can cause stroke. Stroke is a common disease that seriously threatens human health and is the leading cause of long-term disability in adults. The key to treating stroke is to remove blood clots in blood vessels as soon as possible, open blocked blood vessels, and restore blood flow to save ischemic tissue. At present, most hospitals usually use instrumental thrombectomy, using thrombus aspiration catheters for thrombectomy. Its design structure is similar to that of a microcatheter. After reaching the location of the thrombus lesion, a certain negative pressure is loaded at the end to suck the free thrombus that blocks the blood vessel into the catheter or adsorb it at the catheter port and pull it out of the body, so that the blood vessels can re-establish blood flow dynamics.

[0003] However, due to the limited diameter of blood vessels, the diameter of the thrombus aspiration catheter is also limited, so some problems may arise during the thrombus aspiration process: on the one hand, thrombi vary in size, and some of the aspirated thrombi will be blocked at the end of the catheter. When the thrombus continues to be pulled, the thrombus and the catheter head are likely to block the blood vessel, further expanding the adverse effects caused by vascular tissue ischemia and causing the aspiration operation to fail; on the other hand, after the thrombus aspiration catheter has absorbed the thrombus, the aspiration catheter needs to be pulled out. Due to the unstable pressure in the aspiration catheter cavity, the catheter has poor aspiration stability for the thrombus, and the thrombus in the aspiration catheter is very likely to slip out of the tube, requiring the thrombus to be aspirated again, which in turn affects the efficiency of the operation. Utility Model Content

[0004] In order to solve the technical problems in the prior art that blood clots and catheter heads are prone to block blood vessels, causing failure of aspiration surgery, and that the pressure in the aspiration catheter cavity is unstable, resulting in poor stability in aspiration of blood clots by the catheter, affecting the efficiency of the surgery, the utility model provides the following technical solutions.

[0005] The utility model discloses a thrombus aspiration catheter with high stability, comprising a hollow catheter body, one end of the catheter body is provided with a negative pressure end connected to an external negative pressure component and a sealing end connected to a hollow guide wire tube, the guide wire tube penetrates the sealing end and extends to the suction end arranged at the other end of the catheter body, a negative pressure hole is provided on the side of the guide wire tube close to the negative pressure end, a thrombus breaking component is connected to the end of the guide wire tube close to the suction end, an adsorption part is provided at the connection between the thrombus breaking component and the guide wire tube, a plurality of adsorption holes are provided in the circumferential direction of the adsorption part, the negative pressure hole is connected to the adsorption hole through a connecting channel arranged in the inner cavity of the guide wire tube, so as to adsorb the thrombus broken by the thrombus breaking component.

[0006] As a further technical solution, the plug-breaking component includes a conical column fixedly connected to the adsorption portion and an insertion end located at the other end of the conical column.

[0007] As a further technical solution, a spiral groove is provided on the outer peripheral wall of the conical column.

[0008] As a further technical solution, a sharp piercing portion is provided at one end of the insertion end away from the conical column.

[0009] As a further technical solution, a tracer ring is provided on the inner wall or the outer wall of the suction end.

[0010] As a further technical solution, the catheter body is a non-rigid tube body and a bending-resistant tube body.

[0011] As a further technical solution, the guide wire tube can slide axially relative to the sealing end, and when the guide wire tube slides, the negative pressure hole is located in the inner cavity of the catheter body.

[0012] The utility model has the beneficial effect that a hollow guide wire tube is connected to the inner cavity of the catheter body, and a thrombus-breaking component is arranged at one end of the guide wire tube close to the thrombus. After the thrombus-breaking component is rotated, a larger thrombus can be broken into smaller thrombus, and the smaller thrombus is sucked by the suction end and the adsorption part, so that the larger thrombus is prevented from blocking the catheter and the blood vessel, and the thrombus suction effect is improved; when the suction catheter is pulled out, the adsorption part of the guide wire tube and the conical column of the thrombus-breaking component can firstly extract part of the thrombus, and then when the catheter is pulled out again, the remaining part of the thrombus is not easy to slide out under sufficient negative pressure, so the catheter's suction stability for the thrombus is improved, and the suction operation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the thrombus aspiration catheter with high stability of the utility model;

[0014] Figure 2 It is a schematic diagram of the thrombus-breaking component of the thrombus aspiration catheter with high stability of the utility model;

[0015] Figure 3 It is a schematic cross-sectional view of one end of the guide wire tube of the thrombus aspiration catheter with high stability of the utility model;

[0016] In the figure: 1-catheter body; 101-connecting hole; 2-negative pressure end; 3-sealing end; 4-suction end; 5-tracing ring; 6-guide wire tube; 601-negative pressure hole; 602-adsorption part; 603-adsorption hole; 604-connecting channel; 7-plug-breaking component; 701-conical column; 702-spiral groove; 703-insertion end; 704-puncture part. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower" and "both sides" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0019] like Figure 1 As shown, the utility model is a thrombus aspiration catheter with high stability, comprising a hollow catheter body 1, which is a non-rigid tube body and a bending-resistant tube body. Specifically, the inner wall of the catheter body 1 has a certain strength to prevent the catheter body 1 from bending during negative pressure aspiration, and the inner wall is an ultra-smooth inner wall, which facilitates the smooth aspiration of the thrombus.

[0020] like Figure 1 and Figure 2 As shown, in a preferred embodiment, one end of the catheter body 1 is provided with a negative pressure end 2 and a sealing end 3. The outer wall of the catheter body 1 is provided with a connecting hole 101, and the negative pressure end 2 is connected to the inner cavity of the catheter body 1 on the outer wall of the catheter body 1 and through the connecting hole 101, and is connected to an external negative pressure component, and the external negative pressure component provides negative pressure for the inner cavity of the catheter body 1, and the negative pressure is used to adsorb the thrombus. The sealing end 3 seals one end of the catheter body 1, and the sealing end 3 leaves a through hole, and the through hole is connected with a hollow guide wire tube 6, and the part of the guide wire tube 6 extending into the catheter body 1 is provided with an inner cavity, but the part of the guide wire tube 6 located outside the sealing end 3 is closed, and the closed part of the hand-held push material is used to make the guide wire tube 6 slide axially relative to the sealing end 3, and the guide wire tube 6 slides to approach or move away from the thrombus, which can break and adsorb the thrombus, and pull the thrombus back to the inner cavity of the catheter body 1.

[0021] In a preferred embodiment, after the guide wire tube 6 passes through the sealing end 3, its inner cavity extends to the suction end 4 provided at the other end of the catheter body 1. The suction end 4 is a flexible port. The inner wall or outer wall of the suction end 4 is provided with a tracer ring 5. The tracer ring 5 is an annular structure that develops under visible light, and it can be made of platinum or gold material, or it can be made of a polymer material with metal powder attached.

[0022] A negative pressure hole 601 is provided on one side of the inner cavity of the guide wire tube 6 near the negative pressure end 2. When the guide wire tube 6 slides relative to the sealing end 3, the negative pressure hole 601 is in the inner cavity of the catheter body 1. The inner cavity of the guide wire tube 6 is a connecting channel 604. The end of the guide wire tube 6 near the suction end 4 is connected with a thrombus-breaking component 7. The connection between the thrombus-breaking component 7 and the guide wire tube 6 is provided with an adsorption portion 602. The adsorption portion 602 is circumferentially provided with a plurality of adsorption holes 603. The negative pressure hole 601 is connected to the adsorption hole 603 through the connecting channel 604 provided in the inner cavity of the guide wire tube 6. The negative pressure generated by the negative pressure end 2 is connected to the adsorption hole 603 from the negative pressure hole 601. When the negative pressure end 2 provides negative pressure, the inner cavity of the catheter body 1 generates negative pressure to adsorb the thrombus at the suction end 4. At the same time, when the thrombus is aspirated and the catheter body 1 is withdrawn, the adsorption portion 602 adsorbs the thrombus broken by the thrombus-breaking component 7 and stably adsorbs the thrombus adsorbed on the suction end 4.

[0023] In a preferred embodiment, the thrombus-breaking component 7 comprises a conical column 701 fixedly connected to the adsorption part 602 and an insertion end 703 located at one end of the conical column 701 away from the adsorption part 602. The outer peripheral wall of the conical column 702 is provided with a spiral groove 702, and the end of the insertion end 703 away from the conical column 702 is provided with a sharp piercing part 704. The thrombus-breaking component 7 is used to break up large or highly viscous thrombi, and the adsorption part 602 and the suction end 4 are used to suck the thrombi.

[0024] When the utility model is in use, the catheter body 1 is guided by the guide wire to the position of the thrombus and approaches the thrombus, the negative pressure end 2 provides negative pressure, and the suction end 4 sucks the thrombus; at this time, if the thrombus is large, the guide wire tube 6 is pushed and pulled from the sealing end 3, and the thrombus-breaking component 7 at one end of the guide wire tube 6 passes through the thrombus through the piercing portion 704 and the insertion end 703, and the guide wire tube 6 is twisted to rotate relative to the catheter body 1. At this time, the rotating conical column 701 and the spiral groove 702 break the thrombus, so that the larger thrombus is broken into small pieces of thrombus. At the same time, the negative pressure end 2 continues to work, and the suction end 4 and the adsorption part 602 suck the thrombus to complete the suction action on the thrombus. At this time, the guide wire tube 6 is pulled to make the thrombus-breaking component 7 slide toward the sealing end 3, the conical column 701 and the adsorption part 602 pull out part of the thrombus, and the remaining part of the thrombus is completely sucked out by the suction end 4.

[0025] The preferred specific implementation modes and embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation modes and embodiments, and various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.

Claims

1. A thrombus aspiration catheter with high stability, comprising a hollow catheter body (1), characterized in that: One end of the catheter body (1) is provided with a negative pressure end (2) connected to an external negative pressure component and a sealing end (3) connected to a hollow guide wire tube (6); the guide wire tube (6) passes through the sealing end (3) and extends to a suction end (4) provided at the other end of the catheter body (1); a negative pressure hole (601) is provided on one side of the guide wire tube (6) close to the negative pressure end (2); an end of the guide wire tube (6) close to the suction end (4) is connected to a thrombus-breaking component (7); an adsorption portion (602) is provided at the connection between the thrombus-breaking component (7) and the guide wire tube (6); a plurality of adsorption holes (603) are provided on the circumference of the adsorption portion (602); the negative pressure hole (601) is connected to the adsorption hole (603) through a connecting channel (604) provided in the inner cavity of the guide wire tube (6) so as to adsorb the thrombus broken by the thrombus-breaking component (7).

2. The thrombus aspiration catheter with high stability according to claim 1, characterized in that: The plug-breaking component (7) comprises a conical column (701) fixedly connected to the adsorption portion (602) and an insertion end (703) located at the other end of the conical column (701).

3. The thrombus aspiration catheter with high stability according to claim 2, characterized in that: The outer peripheral wall of the conical column (701) is provided with a spiral groove (702).

4. The thrombus aspiration catheter with high stability according to claim 2, characterized in that: The end of the insertion end (703) away from the conical column (701) is provided with a sharp piercing portion (704).

5. The thrombus aspiration catheter with high stability according to claim 1, characterized in that: The inner wall or outer wall of the suction end (4) is provided with a tracer ring (5).

6. The thrombus aspiration catheter with high stability according to claim 1, characterized in that: The catheter body (1) is a non-rigid tube body and a bending-resistant tube body.

7. The thrombus aspiration catheter with high stability according to claim 1, characterized in that: The guide wire tube (6) can slide axially relative to the sealing end (3), and when it slides, the negative pressure hole (601) is located in the inner cavity of the catheter body (1).

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