A thrombectomy catheter

Abstract

This application discloses a thrombectomy catheter. The catheter includes a first tube body, a balloon, and a occlusion element. The first tube body is capable of providing thrombolytic drugs. The balloon is connected to the first tube body, and at least two balloons are provided, spaced apart along the axial direction of the first tube body. The occlusion element can be inserted into the first tube body and occludes the first tube body at a position corresponding to any of the balloons. In the thrombectomy catheter provided in this application embodiment, the occlusion element can be inserted into the first tube body and occlude the first tube body at a position corresponding to any of the balloons, ensuring that the infusion area is precisely at the location within the blood vessel requiring thrombolysis; effectively preventing leakage of thrombolytic drugs in non-target areas, improving drug utilization efficiency, and enhancing the thrombolytic therapeutic effect.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a thrombectomy catheter. Background Technology

[0002] In the treatment of cardiovascular diseases, thrombosis is a key factor leading to many serious conditions, such as acute myocardial infarction, pulmonary embolism, and ischemic stroke. These diseases are characterized by high morbidity, high disability rates, and high mortality rates, seriously threatening human health and quality of life. Thrombolytic therapy, as an important treatment method, aims to restore vascular patency and improve tissue perfusion by dissolving thrombi, thereby saving endangered tissues and organs.

[0003] Thrombolytic catheters are key medical devices for thrombolytic therapy. Their basic principle is to directly infuse thrombolytic drugs to the thrombus site, increasing the local drug concentration, enhancing the thrombolytic effect, and reducing adverse reactions such as bleeding caused by systemic medication.

[0004] Currently available thrombolytic catheters typically have a fixed or difficult-to-adjust infusion zone length. However, in actual clinical applications, the location, length, and morphology of thrombi vary significantly among different patients. For example, in some patients with deep vein thrombosis, the thrombus may be confined to a short segment of vein; while in other cases, the thrombus may extend a long distance along the vein, even involving multiple veins. Furthermore, even in the same patient, the extent of the thrombus may change at different stages of treatment.

[0005] In view of this, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0006] One objective of this application is to provide a new technical solution for thrombectomy catheters.

[0007] According to a first aspect of this application, a thrombectomy catheter is provided, the thrombectomy catheter comprising:

[0008] The first tube body is capable of providing thrombolytic medication;

[0009] The capsule is connected to the first tube, and at least two capsules are provided, with the at least two capsules distributed at intervals along the axial direction of the first tube.

[0010] A sealing element, which can be inserted into the first tube and seal the first tube at any position corresponding to the bladder.

[0011] Optionally, the first tube body includes a first sub-tube, one end of which is used to connect to a pressurizing medium source. The first sub-tube is configured in a one-to-one correspondence with the bladder body, and the first sub-tube has a medium outlet that communicates with the corresponding bladder body.

[0012] Optionally, the first tube includes a second sub-tube, which is isolated from the first sub-tube. The second sub-tube is used to fill with thrombolytic solution, and the side wall of the second sub-tube has a spray hole. The sealing member can be inserted into the second sub-tube and seal the second sub-tube at any position corresponding to the capsule.

[0013] Optionally, the first tube body includes a third sub-tube, which is isolated from the first sub-tube; the first end of the third sub-tube is used to connect to a drug delivery source, and the second end of the third sub-tube is connected to the second sub-tube.

[0014] Optionally, the thrombectomy catheter has a closed structure at the second end position corresponding to the third sub-tube.

[0015] Optionally, the thrombectomy catheter is provided with a contrast ring for each of the cysts.

[0016] Optionally, the occlusion element includes an interconnected conduit and an occlusion head, wherein the average diameter of the occlusion head is larger than the diameter of the conduit, and the occlusion head is used to occlude the first tube at any position corresponding to the cyst.

[0017] Optionally, the end of the plugging head away from the conduit is arc-shaped.

[0018] Optionally, the thrombectomy catheter further includes a second tube body connected to the side of the first tube body and isolated from the first tube body; the inner diameter of the second tube body is smaller than the inner diameter of the first tube body, and the second tube body is configured to allow the insertion of a guide wire.

[0019] Optionally, the second tube body is isolated from either of the aforementioned capsule bodies.

[0020] In the thrombolytic catheter provided in this application embodiment, the occlusion element can be inserted into the first tube body and occlude the first tube body at the position corresponding to any of the balloons, so that the infusion area is exactly at the location in the blood vessel where thrombolysis treatment is required; effectively preventing the leakage of thrombolytic drug solution in non-target areas, improving the efficiency of drug solution use, and enhancing the effect of thrombolytic therapy.

[0021] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0023] Figure 1 This is an exploded structural diagram of a thrombectomy catheter according to an embodiment of this application;

[0024] Figure 2 This is a partial structural perspective view of a thrombectomy catheter according to an embodiment of this application. Figure 1 ;

[0025] Figure 3 yes Figure 2 AA section view in the middle;

[0026] Figure 4 This is a partial structural perspective view of a thrombectomy catheter according to an embodiment of this application. Figure 2 ;

[0027] Figure 5 yes Figure 4 BB section view in the middle;

[0028] Figure 6 This is a schematic diagram of the occlusion element in a thrombectomy catheter according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Thrombectomy catheter; 11. First tube body; 111. First daughter tube; 1110. Media outlet; 112. Second daughter tube; 113. Third daughter tube; 12. Capsule body; 13. Occlusion element; 131. Catheter; 132. Occlusion head; 14. Imaging ring; 15. Second tube body; 16. Connector; 17. First Luer connector; 170. Switch; 18. Second Luer connector; 19. Channel. Detailed Implementation

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] Reference Figures 1-6 As shown, according to one embodiment of this application, a thrombectomy catheter 1 is provided. The thrombectomy catheter 1 includes a first tube body 11, a balloon body 12, and a sealing element 13. The first tube body 11 is capable of providing thrombolytic drugs. The balloon body 12 communicates with the first tube body 11, and at least two balloon bodies 12 are provided, with the at least two balloon bodies 12 spaced apart along the axial direction of the first tube body 11. The sealing element 13 can be inserted into the first tube body 11 and seals the first tube body 11 at a position corresponding to any of the balloon bodies 12.

[0037] In the thrombolytic catheter 1 provided in this application embodiment, thrombolytic drug solution is provided through the first tube body 11, providing a drug solution source for thrombolytic therapy. At least two sacs 12 are provided at axial intervals along the first tube body 11, so that the selected sacs 12 can be filled with a medium at different positions to expand the selected sacs 12. The expanded sacs 12 can, on the one hand, squeeze the first tube body 11 at the corresponding position, so that the inner diameter of the first tube body 11 at the corresponding position is reduced, thereby controlling the sealing member 13 to seal the first tube body 11 at this position, realizing flexible adjustment of the infusion area length to meet the needs of thrombolytic drug solution infusion range in different treatment scenarios; on the other hand, the expanded sacs 12 can also dilate blood vessels.

[0038] In the thrombectomy catheter 1 provided in this application embodiment, the occlusion member 13 can be inserted into the first tube body 11 and block the first tube body 11 at the position corresponding to any of the balloons 12, so that the infusion area is exactly at the position in the blood vessel where thrombolysis treatment is required; effectively preventing the leakage of thrombolytic drug solution in non-target areas, improving the efficiency of drug solution use, and enhancing the effect of thrombolytic therapy.

[0039] Reference Figures 2-5 As shown, in one embodiment, the first tube 11 includes a first sub-tube 111, one end of which is used to connect to a pressurizing medium source. The first sub-tube 111 is configured to correspond one-to-one with the capsule 12. The first sub-tube 111 has a medium outlet 1110 that communicates with the corresponding capsule 12.

[0040] In this specific example, one end of the first sub-tube 111 is connected to a pressurizing medium source. For example, the first tube 11 has a connector 16 connected to the first end corresponding to the first sub-tube 111. The first end of the first sub-tube 111 is connected to the pressurizing medium source through a first Luer connector 17. Specifically, the head end of the first Luer connector 17 is connected to the pressurizing medium source, and the tail end of the first Luer connector 17 is inserted into the connector 16 and communicates with the first sub-tube 111. After the medium is filled into the bladder 12, the switch 170 of the first Luer connector 17 can be rotated to close and maintain pressure. The first sub-tube 111 and the bladder 12 are configured one-to-one and have a medium outlet 1110 communicating with the corresponding bladder 12. This allows for precise control of the pressurization of each bladder 12, enabling independent adjustment of the expansion degree of the bladder 12. This, in turn, allows for more precise control of the inner diameter change of the first tube 11, further optimizing the control of the position of the sealing element 13 and improving the accuracy of the infusion zone length adjustment.

[0041] Reference Figures 2-5 As shown, in one embodiment, the first tube 11 includes a second sub-tube 112, which is isolated from the first sub-tube 111. The second sub-tube 112 is used to fill with thrombolytic solution, and the side wall of the second sub-tube 112 is provided with a spray hole. The sealing member 13 can be inserted into the second sub-tube 112 and seal the second sub-tube 112 at any position corresponding to the bladder 12.

[0042] In this specific example, the second sub-tube 112 is isolated from the first sub-tube 111 and is used to fill the thrombolytic drug solution. The side wall of the second sub-tube 112 is provided with a spray hole so that the thrombolytic drug solution can be evenly injected into the blood vessel through the spray hole, increasing the contact area between the drug solution and the thrombus and improving the thrombolytic efficiency.

[0043] The sealing element 13 can be inserted into the second sub-tube 112 and seal the second sub-tube 112 at the position corresponding to any of the capsules 12. While controlling the length of the infusion zone, it ensures that the drug is released within the target area, avoids drug waste and unnecessary diffusion, and reduces potential impact on surrounding normal tissues.

[0044] Reference Figures 2-5 As shown, in one embodiment, the first tube 11 includes a third sub-tube 113, which is isolated from the first sub-tube 111; the first end of the third sub-tube 113 is used to connect to a drug delivery source, and the second end of the third sub-tube 113 is connected to the second sub-tube 112.

[0045] In this specific example, the third sub-tube 113 is isolated from the first sub-tube 111. The first end of the third sub-tube 113 is connected to the drug delivery source, and the second end of the third sub-tube 113 is connected to the second sub-tube 112. The drug solution is filled into the third sub-tube 113 from the first end, and then enters the second sub-tube 112 through the second end of the third sub-tube 113. This makes the drug delivery path of the thrombolytic drug solution independent of the pressurizing medium path, avoiding mutual interference between the two; and the drug delivery path is also independent of the travel path of the sealing component 13; thus ensuring the stability and accuracy of the thrombolytic drug solution delivery, which is beneficial for precise control of the infusion volume of the thrombolytic drug solution.

[0046] For example, the first end of the third sub-tube 113 is connected to the drug delivery source via the second Luer connector 18. Specifically, the head end of the second Luer connector 18 is connected to the drug delivery source, and the tail end of the second Luer connector 18 is inserted into the connector 16 and communicates with the first end of the third sub-tube 113. The first end of the second sub-tube 112 is connected to the channel 19, and the sealing member 13 is inserted into the second sub-tube 112 via the channel 19. The second end of the second sub-tube 112 communicates with the second end of the third sub-tube 113, so that the drug solution filled into the third sub-tube 113 can enter the second sub-tube 112.

[0047] Reference Figure 2 As shown, in one embodiment, the thrombectomy catheter has a closed structure at the second end position corresponding to the third sub-tube 113.

[0048] In this specific example, the thrombectomy catheter has a closed structure at the second end corresponding to the third sub-tube 113 and the second end of the second sub-tube 112, thereby preventing leakage of thrombolytic drugs in non-target areas, ensuring that all drugs enter the blood vessels through the spray hole of the second sub-tube 112, improving drug utilization, enhancing the thrombolytic effect, and reducing side effects that may be caused by drug leakage.

[0049] Reference Figure 2 , Figure 4 As shown, in one embodiment, the thrombectomy catheter is provided with a radiopaque ring 14 corresponding to each of the capsules 12.

[0050] In this specific example, each cyst 12 is equipped with a contrast ring, which can clearly show the position of the cyst 12 under X-ray, making it easier for doctors to accurately place the cyst 12 at the thrombus site during the operation, improving the precision and safety of the operation, reducing surgical risks, and ensuring the effectiveness of the treatment.

[0051] Reference Figure 1 , Figure 6As shown, in one embodiment, the occlusion element 13 includes a conduit 131 and an occlusion head 132 connected to each other. The average diameter of the occlusion head 132 is larger than the diameter of the conduit 131. The occlusion head 132 is used to occlude the first tube 11 at any position corresponding to the bladder 12.

[0052] In this specific example, the occlusion device 13 includes a catheter 131 and an occlusion head 132 connected to each other. The average diameter of the occlusion head 132 is larger than the diameter of the catheter 131. This structure allows the occlusion head 132 to effectively block the first tube 11 at any position corresponding to the cyst 12, preventing leakage of thrombolytic drug. The catheter 131 facilitates the insertion of the occlusion head 132 into the designated position, making the operation convenient and improving the efficiency of the operation.

[0053] Reference Figure 6 As shown, in one embodiment, the end of the plugging head 132 away from the conduit 131 is arc-shaped.

[0054] In this specific example, the end of the occluder 132 away from the catheter 131 is arc-shaped. During the insertion into the first tube 11, the arc-shaped end of the occluder 132 can reduce damage to the inner wall of the first tube 11, reduce the risk of stimulation and damage to blood vessels during the operation, and improve the safety of the operation and the comfort of the patient.

[0055] The diameter of the conduit 131 is constant throughout, meaning the conduit 131 has a constant diameter structure; the diameter of the plugging head 132 gradually increases in the direction away from the conduit 131 and the end is set in an arc shape to ensure the plugging effect.

[0056] Reference Figures 1-2 As shown, in one embodiment, the thrombectomy catheter further includes a second tube 15, which is connected to the side of the first tube 11 and is isolated from the first tube 11; the inner diameter of the second tube 15 is smaller than the inner diameter of the first tube 11, and the second tube 15 is configured to allow the insertion of a guide wire.

[0057] In this specific example, the second tube 15 is connected to the side of the first tube 11 and is isolated from it. The inner diameter of the second tube 15 is much smaller than that of the first tube 11. The second tube 15 can accommodate a guide wire, allowing the second tube 15, along with the first tube 11, to enter the blood vessel along the guide wire. This provides a dedicated channel for guiding and positioning the thrombectomy catheter within the blood vessel, enabling the catheter to reach the lesion site more accurately. Simultaneously, the isolation between the second tube 15 and the first tube 11 prevents interference between the guide wire, thrombolytic drugs, and pressurizing media, ensuring the normal operation of each component.

[0058] Reference Figures 1-2As shown, in one embodiment, the second tube 15 is isolated from either of the said capsules 12.

[0059] In this specific example, the second tube 15 is isolated from any of the balloons 12 to prevent compression of the second tube 15 during the inflation and expansion of the balloons; after the guide wire is withdrawn, the second tube 15 can be used for blood flow, thereby realizing the function of blood perfusion.

[0060] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0061] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. An embolus extraction catheter, comprising: The thrombectomy catheter includes: The first tube (11) is capable of providing thrombolytic solution; The capsule (12) is connected to the first tube (11), and at least two capsules (12) are provided, with at least two capsules (12) distributed at intervals along the axial direction of the first tube (11); A sealing element (13) is inserted into the first tube (11) and seals the first tube (11) at a position corresponding to any of the bladders (12).

2. The dislodging catheter of claim 1, wherein, The first tube (11) includes a first sub-tube (111), one end of which is used to connect to a pressurizing medium source. The first sub-tube (111) is provided in a one-to-one correspondence with the bladder (12). The first sub-tube (111) has a medium outlet (1110) that communicates with the corresponding bladder (12).

3. The dislodging catheter of claim 2, wherein, The first tube (11) includes a second sub-tube (112), which is isolated from the first sub-tube (111). The second sub-tube (112) is used to fill with thrombolytic solution, and the side wall of the second sub-tube (112) is provided with a spray hole. The sealing member (13) can be inserted into the second sub-tube (112) and seal the second sub-tube (112) at any position corresponding to the capsule (12).

4. The dislodging catheter of claim 3, wherein, The first tube body (11) includes a third sub-tube (113), which is isolated from the first sub-tube (111); the first end of the third sub-tube (113) is used to connect to the drug delivery source, and the second end of the third sub-tube (113) is connected to the second sub-tube (112).

5. The dislodging catheter of claim 4, wherein, The thrombectomy catheter has a closed structure at the second end position corresponding to the third sub-tube (113).

6. The dislodging catheter of claim 1, wherein, The thrombectomy catheter is provided with a contrast ring (14) corresponding to each of the capsules (12).

7. The dislodging catheter of claim 1, wherein, The sealing element (13) includes a conduit (131) and a sealing head (132) connected to each other. The average diameter of the sealing head (132) is larger than the diameter of the conduit (131). The sealing head (132) is used to seal the first tube (11) at a position corresponding to any of the bladders (12).

8. The dislodging catheter of claim 7, wherein, The end of the plug (132) away from the conduit (131) is arc-shaped.

9. The dislodging catheter of claim 1, wherein, The thrombectomy catheter also includes a second tube (15), which is connected to the side of the first tube (11) and is isolated from the first tube (11); the inner diameter of the second tube (15) is smaller than the inner diameter of the first tube (11), and the second tube (15) is configured to allow the insertion of a guide wire.

10. The dislodging catheter of claim 9, wherein, The second tube (15) is isolated from any of the capsules (12).

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