Double-balloon catheter capable of providing enhanced penetrating power

Abstract

The invention relates to the technical field of medical instruments, in particular to a double-balloon catheter capable of providing enhanced penetrating power. The double-balloon catheter capable of providing enhanced penetrating power comprises an outer catheter body and an inner penetrating catheter body, the outer portion of one end of the outer catheter body is wrapped with a flexible balloon support with the size capable of being expanded or shrunk, and the inner penetrating catheter body is arranged in the outer catheter body. One end of the inner penetrating catheter is externally wrapped with a flexible balloon dilatation unit with the size capable of being expanded or reduced, the other end of the inner penetrating catheter penetrates through the other end of the outer catheter, the inner penetrating catheter can move relative to the outer catheter, and a guide wire cavity penetrating through the two ends of the inner penetrating catheter is formed in the middle of the inner penetrating catheter. The invention has the advantages that the structural design is simple and reasonable, and anchoring in the blood vessel can be provided by using the flexible balloon support of the outer catheter, so that the inner puncture catheter can effectively pass through the blood vessel to block points.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a double balloon catheter that can provide enhanced penetration. Background Technology

[0002] A balloon dilation catheter is a flexible catheter with an inflatable balloon at its tip, typically with a double-lumen structure. Without inflation, the balloon catheter is inserted into the target lesion site. Contrast agent is then injected through the catheter tip remaining outside the body, gradually inflating the balloon to dilate the lesion. After successful treatment, the contrast agent is withdrawn, causing the balloon to deflate and allowing the balloon catheter to be expelled from the body.

[0003] When encountering vascular blockage during treatment, it is necessary to first use a guidewire to puncture through the blockage, and then push the catheter through the blockage along the guidewire. However, in clinical practice, due to the thin and long catheter, the tip of the balloon catheter is not easy to pass through when pushing it through the blockage, and the tip is prone to bending when encountering obstacles. Therefore, it may require doctors to spend a long time and a lot of effort to get the catheter through the blockage, resulting in a long treatment cycle. Sometimes, it may even be impossible to pass through and other instruments may be needed to assist, leading to a long operation cycle or operation failure, and significantly increasing the risk of operation.

[0004] Therefore, it is necessary to develop a double balloon catheter that can provide strong support without the need for other instruments to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dual balloon catheter that can provide enhanced penetration, effectively overcoming the defects of the prior art.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A dual-balloon catheter that provides enhanced penetration includes an outer catheter and an inner penetrating catheter. One end of the outer catheter is externally wrapped with a flexible balloon support that can expand or contract in volume. The inner penetrating catheter is embedded in the outer catheter. One end of the inner penetrating catheter is externally wrapped with a flexible balloon dilation unit that can expand or contract in volume. The other end of the inner penetrating catheter passes through the other end of the outer catheter. The inner penetrating catheter is movable relative to the outer catheter. The inner penetrating catheter has a guidewire lumen that passes through both ends of it.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the other end of the aforementioned external catheter is provided with a first connector, and the other end of the aforementioned internal penetrating catheter passes through the aforementioned first connector.

[0009] Furthermore, the aforementioned flexible balloon support includes a first balloon, and the aforementioned external catheter is provided with a first balloon cavity. One end of the aforementioned first balloon cavity is connected to the inner cavity of the aforementioned first balloon, and the other end is connected to a first interface disposed on the surface of the aforementioned first connector.

[0010] Furthermore, the aforementioned flexible balloon dilation unit includes a second balloon, and the aforementioned internal perforation catheter is provided with a second balloon cavity. One end of the aforementioned second balloon cavity is connected to the inner cavity of the aforementioned second balloon, and the other end is led out from the other end of the aforementioned internal perforation catheter.

[0011] Furthermore, the other end of the aforementioned internal penetrating catheter is provided with an operating handle, and the surface of the operating handle is provided with a second interface communicating with the other end of the aforementioned second balloon cavity.

[0012] Furthermore, the size of the second balloon after inflation is smaller than the size of the first balloon after inflation.

[0013] Furthermore, the inflated size of the second balloon is 1.0-5.0 mm, and the inflated size of the first balloon is 2.0-10.0 mm.

[0014] Furthermore, one end of the aforementioned internal penetrating catheter is provided with a puncture structure.

[0015] Furthermore, the aforementioned puncture structure is a hollow conical tube.

[0016] Furthermore, both the external catheter and the internal penetrating catheter have imaging marks at one end.

[0017] The beneficial effects of this invention are: the structure is simple and reasonable, and it can use the flexible balloon of the external catheter to provide anchorage in the blood vessel, thereby enabling the internal puncture catheter to effectively pass through the blood vessel blockage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the double balloon catheter of the present invention, which can provide enhanced penetration. Figure 2 This is a schematic diagram of another embodiment of the double balloon catheter of the present invention, which can provide enhanced penetration.

[0019] The attached diagram lists the components represented by each number as follows: 1. External catheter; 2. Internal penetrating catheter; 3. Flexible balloon support; 4. Flexible balloon dilation unit; 11. First connector; 21. Operating handle; 22. Puncture structure. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] Example like Figure 1 and 2 As shown, the dual-balloon catheter of this embodiment, which can provide enhanced penetration, includes an outer catheter 1 and an inner penetrating catheter 2. One end of the outer catheter 1 is wrapped with a flexible balloon support 3 that can expand or shrink in volume. The inner penetrating catheter 2 is built into the outer catheter 1. One end of the inner penetrating catheter 2 is wrapped with a flexible balloon dilation unit 4 that can expand or shrink in volume. The other end passes through the other end of the outer catheter 1. The inner penetrating catheter 2 can move relative to the outer catheter 1. The inner penetrating catheter 2 has a guidewire lumen that passes through both ends of it.

[0022] The usage process of the dual-balloon catheter in this embodiment, which provides enhanced penetration, is as follows: The interventional procedure begins by inserting the guidewire along the guidewire lumen. The guidewire is then used to pass through the occlusion (thrombus) within the blood vessel. Next, a double-balloon catheter is inserted along the guidewire until the flexible balloon support 3 approaches the occlusion. The procedure then inflates the flexible balloon support 3, bringing it into close contact with the vessel wall. Simultaneously, the external catheter 1 remains in place. Next, the internal penetrating catheter 2 is advanced externally along the guidewire. Because the inflated flexible balloon support 3 provides "support" (or constraint along the long axis of the catheter) at the occlusion, one end of the internal penetrating catheter 2, when passing the flexible balloon support 3, is subject to the "constraint" from the corresponding part of the external catheter 1. Therefore, one end of the internal penetrating catheter 2 (the puncture end) will not bend or bend when penetrating the occlusion, making it easier to puncture through the occlusion. After puncture, the internal penetrating catheter 2 is moved further to reach the lesion. The expansion of the flexible balloon dilation unit 4 is then used to dilate and treat the target lesion. The overall structure is simple and reasonable, and it can use the external catheter flexible balloon support to provide anchorage in the blood vessel, so that the internal puncture catheter can effectively pass through the blood vessel blockage.

[0023] In this embodiment, the flexible balloon support 3 can be an expandable metal stent, which is pushed to the blockage point in the blood vessel using a sheath.

[0024] Preferably, the other end of the external conduit 1 is provided with a first connector 11, and the other end of the internal penetrating conduit 2 passes through the first connector 11. The first connector 11 is a straight tube-shaped connector, and the other end of the internal penetrating conduit 2 passes through the end of the first connector 11 away from the external conduit 1, and the penetration part is relatively sealed.

[0025] In a preferred embodiment, the flexible balloon support 3 includes a first balloon, and the external catheter 1 is provided with a first balloon cavity. One end of the first balloon cavity is connected to the inner cavity of the first balloon, and the other end is connected to a first interface (a in the figure) provided on the surface of the first connector 11.

[0026] In the above implementation scheme, the flexible balloon support 3 uses a clinically standard balloon, which, when inflated, is cylindrical or spherical. A first balloon channel is provided along the long axis of the external catheter 1's sidewall. The two ends of this first balloon channel are respectively connected to a first interface on the surface of the first connector 11 and the inner cavity of the first balloon. The first interface is connected to the balloon's inflation tubing. Media is injected into the first balloon through the inflation tubing, causing it to inflate. After inflation, the first balloon approaches or contacts the blockage point and simultaneously makes close contact with the inner wall of the blood vessel. Its structural design is simple and reasonable, and its operation is relatively convenient.

[0027] In a preferred embodiment, the flexible balloon dilation unit 4 includes a second balloon, and the internal penetrating catheter 2 is provided with a second balloon cavity. One end of the second balloon cavity is connected to the inner cavity of the second balloon, and the other end is led out from the other end of the internal penetrating catheter 2.

[0028] In the above implementation scheme, the second balloon is a clinically standard balloon (OTW balloon), which, after inflation, is cylindrical or spherical. A second balloon channel is provided along the long axis of the inner wall of the inner penetrating catheter 2. The two ends of this second balloon channel are connected to the inner lumen of the second balloon and an inflation line connected to the other end of the inner penetrating catheter 2, respectively. Media is injected into the second balloon through the inflation line, causing the second balloon to inflate. Once inflated, the second balloon can be used for dilation therapy of the target lesion. Its structural design is simple and reasonable, and its operation is relatively convenient.

[0029] Preferably, the other end of the aforementioned internal penetrating catheter 2 is provided with an operating handle 21, and the surface of the operating handle 21 is provided with a second interface (represented by b in the figure) that communicates with the other end of the second balloon cavity. Using the operating handle 21, the internal penetrating catheter 2 can be easily pushed, so that one end of it can smoothly pass through the blockage under the "constraint" of the flexible balloon support 3 and the external catheter 1. At the same time, the second interface on the surface of the operating handle 21 facilitates the connection of the filling line.

[0030] Preferably, the size of the second balloon after inflation is smaller than the size of the first balloon after inflation.

[0031] More specifically, the inflated size of the second balloon is 1.0-5.0 mm, and the inflated size of the first balloon is 2.0-10.0 mm.

[0032] In a preferred embodiment, one end of the aforementioned internal penetrating catheter 2 is provided with a puncture structure 22.

[0033] In the above implementation scheme, setting a puncture structure 22 at one end of the internal penetrating catheter 2 can make it easier for the internal penetrating catheter 2 to puncture the blockage point.

[0034] In this embodiment, the puncture structure 22 can be a hollow conical tube with its diameter gradually decreasing towards the end away from the internal penetrating catheter 2, that is, the tip is away from the internal penetrating catheter 2, forming a "needle shape", which makes the puncture blockage more effective.

[0035] The aforementioned puncture structure 22 can also be a section of obliquely cut tubing (e.g.) Figure 2 As shown in the figure, it is integrally formed with one end of the internal penetrating catheter 2.

[0036] It should be noted that the internal penetrating catheter 2 and the puncture structure 22 are provided with a guidewire channel for the guidewire to pass through. The guidewire can pass through both ends of the internal penetrating catheter 2 and the puncture structure 22, so that the internal penetrating catheter 2 and the puncture structure 22 can move smoothly along the guidewire.

[0037] Preferably, one end of both the external catheter 1 and the internal penetrating catheter 2 is provided with a contrast marker. During the operation, the contrast marker can be visualized under X-ray or other equipment, allowing the doctor to determine the position of one end of the external catheter 1 and the internal penetrating catheter 2 as they enter the blood vessel (or body), thus making the operation smoother.

[0038] Generally, the imaging marker is a metal imaging ring pre-embedded at one end of the inner penetrating catheter 2 and the outer catheter 1.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-balloon catheter that provides enhanced penetration, characterized in that: It includes an external catheter (1) and an internal penetrating catheter (2). One end of the external catheter (1) is wrapped with a flexible balloon support (3) that can be expanded or reduced in volume. The internal penetrating catheter (2) is built into the external catheter (1). One end of the internal penetrating catheter (2) is wrapped with a flexible balloon dilation unit (4) that can be expanded or reduced in volume. The other end passes through the other end of the external catheter (1). The internal penetrating catheter (2) can move relative to the external catheter (1). The internal penetrating catheter has a guidewire lumen that passes through both ends of it.

2. The dual-balloon catheter according to claim 1, characterized in that: The other end of the external catheter (1) is provided with a first connector (11), and the other end of the internal penetrating catheter (2) passes through the first connector (11).

3. A dual-balloon catheter that provides enhanced penetration according to claim 2, characterized in that: The flexible balloon support (3) includes a first balloon, and the external catheter (1) is provided with a first balloon cavity. One end of the first balloon cavity is connected to the inner cavity of the first balloon, and the other end is connected to a first interface provided on the surface of the first connector (11).

4. A dual-balloon catheter according to claim 3 that provides enhanced penetration, characterized in that: The flexible balloon dilation unit (4) includes a second balloon, and the internal penetrating catheter (2) has a second balloon cavity. One end of the second balloon cavity is connected to the inner cavity of the second balloon, and the other end is led out from the other end of the internal penetrating catheter (2).

5. A dual-balloon catheter according to claim 4 that provides enhanced penetration, characterized in that: The other end of the internal penetrating catheter (2) is provided with an operating handle (21), and the surface of the operating handle (21) is provided with a second interface that communicates with the other end of the second balloon cavity.

6. A dual-balloon catheter according to claim 4 that provides enhanced penetration, characterized in that: The size of the second balloon after inflation is smaller than the size of the first balloon after inflation.

7. A dual-balloon catheter according to claim 6 that provides enhanced penetration, characterized in that: The second balloon has a size of 1.0-5.0 mm after inflation, and the first balloon has a size of 2.0-10.0 mm after inflation.

8. A dual-balloon catheter providing enhanced penetration according to any one of claims 1 to 7, characterized in that: One end of the internal penetrating catheter (2) is provided with a puncture structure (22).

9. A dual-balloon catheter according to claim 8 that provides enhanced penetration, characterized in that: The puncture structure (22) is a hollow conical tube.

10. A dual-balloon catheter providing enhanced penetration according to any one of claims 1 to 7, characterized in that: The external catheter (1) and the internal penetrating catheter (2) each have a radiopaque mark at one end.

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