Multi-balloon catheter

Abstract

The invention discloses a multi-balloon catheter which is suitable for being arranged in a descending aorta and close to a renal artery duct, the multi-balloon catheter comprises a catheter body and at least three fixed balloons which are communicated with the periphery of the catheter body and are arranged at intervals, and an inflation cavity communicated with at least one fixed balloon is formed in the catheter body; the three fixing balloons are arranged in the axial direction of the catheter body and all have an expansion state and a contraction state, and the diameter of the single fixing balloon in the expansion state ranges from 8 mm to 12 mm. According to the arrangement, the three fixed balloons are arranged on the catheter body at intervals, segmented contact can be formed for the descending artery catheter, therefore, the overall pressure of the catheter is effectively dispersed, and the risk that the balloons are abraded by plaques can be greatly reduced. The expansion diameter of the three fixed balloons is 8-12 mm, and compared with an existing conventional balloon, the expansion diameter of the three fixed balloons is obviously reduced and is only equivalent to 60%-80% of the expansion diameter of the existing balloon, friction between the balloons and plaques in the descending aortic canal can be effectively avoided, and the balloons are prevented from being clamped due to the fact that the balloon is narrow in the canal.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a multi-balloon catheter. Background Technology

[0002] Modern extracorporeal circulation and mechanical circulation support technologies have become increasingly mature. Circulation support devices, such as intra-aortic balloon counterpulsation, have been widely used in clinical scenarios such as cardiogenic shock, high-risk coronary intervention, and low cardiac output syndrome after cardiac surgery. They provide cardiac support through the rhythmic inflation and deflation of an intra-aortic balloon. However, in long-term clinical application, the safety risks posed by local aortic lesions are becoming increasingly prominent: some patients have degenerative changes in the aortic wall, atherosclerotic plaques, local luminal stenosis, or an uneven intima, especially in the descending aorta within the balloon counterpulsation working area, where plaques are hard and have irregular surfaces. In the traditional balloon counterpulsation mode, the balloon needs to repeatedly, frequently, and periodically expand and contract within the aorta. During long-term exercise, the outer wall of the balloon will continuously rub, squeeze, and scrape against the atherosclerotic plaques and narrowed vessel walls. On the one hand, hard plaques can directly wear down and cut the balloon body, leading to balloon rupture, air leakage, and failure. On the other hand, local stenosis can restrict the normal expansion of the balloon, reduce the counterpulsation effect, and even cause abnormal increases in local pressure due to restricted expansion, further aggravating the risk of plaque damage, plaque detachment, and balloon rupture, which may ultimately lead to serious medical safety events such as circulatory support failure, aortic injury, thromboembolism, and massive bleeding.

[0003] Currently, there is a lack of a safe catheter structure in clinical practice that can stably position itself in the aortic lesion segment, avoid repeated friction with plaque, and not rely on counterpulsation. This makes it difficult to effectively avoid risks such as plaque abrasion balloon and balloon rupture during cardiopulmonary bypass support. Summary of the Invention

[0004] Therefore, the present invention aims to solve the problem that balloons used for aortic counterpulsation in the prior art are prone to rupture due to plaque wear in the arterial tube during long-term use, and thus provides a multi-balloon catheter.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A multi-balloon catheter, suitable for placement within the descending aorta and close to the renal artery, includes a catheter body and at least three spaced-apart fixed balloons communicating with the periphery of the catheter body. The catheter body has an inflation chamber communicating with at least one of the fixed balloons. The three fixed balloons are arranged axially along the catheter body, and each of the three fixed balloons has an inflated state and a deflated state. The diameter of a single fixed balloon in the inflated state is 8 mm-12 mm.

[0006] Furthermore, the three fixation balloons include a first balloon, a second balloon, and a third balloon arranged sequentially from the distal end to the proximal end of the catheter body. The distal end of the catheter body is also provided with a tip, which is fixed to the distal end of the first balloon.

[0007] Furthermore, the expansion diameters of the first balloon, the second balloon, and the third balloon are the same.

[0008] Furthermore, the expansion diameter of the first balloon is smaller than that of the second balloon, and the expansion diameter of the second balloon is smaller than that of the third balloon.

[0009] Furthermore, the expansion diameters of the first, second, and third balloons gradually increase from the distal to the proximal end.

[0010] Furthermore, the expansion diameters of both the first and third balloons are greater than the expansion diameter of the second balloon.

[0011] Furthermore, the first balloon, the second balloon, and the third balloon are connected in sequence, and an inflation chamber connected to one of the fixed balloons is provided inside the catheter body.

[0012] Furthermore, the first balloon, the second balloon, and the third balloon are sequentially connected, and the catheter body is provided with three inflation chambers that are respectively connected to the first balloon, the second balloon, and the third balloon.

[0013] Furthermore, the first balloon, the second balloon, and the third balloon are independently and spaced apart on the periphery of the catheter body, and the catheter body is provided with three inflation chambers that are respectively connected to the first balloon, the second balloon, and the third balloon.

[0014] Furthermore, the interval between two adjacent fixed balloons is 5mm-15mm.

[0015] The technical solution of this invention has the following advantages: 1. The multi-balloon catheter provided by this invention, by spaced three fixed balloons on the catheter body, can form segmented contact with the descending aorta, thereby effectively dispersing the overall pressure of the catheter and significantly reducing the risk of plaque rupture of the balloons. The expansion diameter of the three fixed balloons is 8mm-12mm, which is significantly smaller than that of existing conventional balloons, only equivalent to 60%-80% of existing balloons. This effectively avoids friction between the balloons and plaques in the descending aorta, preventing them from being stuck due to stenosis within the catheter.

[0016] 2. The multi-balloon catheter provided by this invention has a first balloon with a smaller expansion diameter than the second balloon, and a second balloon with a smaller expansion diameter than the third balloon. This design adapts to the distally thinner, proximally thicker structure of the descending aorta, allowing for better fit to the vessel wall. The distal first balloon preferentially passes through areas of thinner vessel with more plaque, thus enhancing resistance to stenosis and plaque interference. The proximal third balloon provides stable support in the thicker segment of the vessel, achieving a balance between overall passability and stability, thereby improving post-insertion stability.

[0017] 3. The multi-balloon catheter provided by this invention has a first balloon and a third balloon with expansion diameters larger than the second balloon. This configuration allows the second balloon, with the smallest diameter located in the middle, to avoid vascular stenosis and plaque. The first and third balloons, located distally and proximally respectively, enhance fixation and support, significantly improving the catheter's stability.

[0018] 4. The multi-balloon catheter provided by the present invention comprises a first balloon, a second balloon, and a third balloon connected in sequence, with an inflation chamber connected to one of the fixed balloons within the catheter body. This configuration allows gas to enter the catheter body and sequentially fill all three balloons (first, second, and third), requiring only one inflation channel within the catheter, thus reducing the complexity of the fabrication process.

[0019] 5. The multi-balloon catheter provided by this invention comprises a first balloon, a second balloon, and a third balloon, which are sequentially connected. The catheter body contains three inflation chambers respectively connected to the first, second, and third balloons. This arrangement, with the first, second, and third balloons interconnected and all connected to the catheter body, allows for more uniform and rapid inflation. Only one inflation channel is required, resulting in a simpler and more reliable structure.

[0020] 6. The multi-balloon catheter provided by this invention comprises a first balloon, a second balloon, and a third balloon, independently and spaced apart on the periphery of the catheter body. The catheter body contains three inflation chambers respectively connected to the first, second, and third balloons. This arrangement allows the first, second, and third balloons to be complementaryly connected, yet each individually connected to the catheter body, enabling independent inflation and deflation of each balloon without interference. Damage to one balloon will not affect the others, resulting in higher safety, resilience, and reliability. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the multi-balloon catheter provided by the present invention; Explanation of reference numerals in the attached diagram: 1. First balloon; 2. Second balloon; 3. Third balloon; 4. Head end. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1The multi-balloon catheter shown is suitable for placement in the descending aorta and close to the renal artery. It includes a catheter body and at least three spaced-apart fixed balloons connected to the periphery of the catheter body. The catheter body has an inflation chamber connected to at least one fixed balloon. The three fixed balloons are arranged axially along the catheter body. All three fixed balloons have an inflated state and a contracted state. The diameter of a single fixed balloon in the inflated state is 10 mm.

[0028] This multi-balloon catheter, by spaced three fixed balloons on the catheter body, can create segmented contact with the descending aorta, effectively dispersing the overall pressure of the catheter and significantly reducing the risk of plaque rupture of the balloons. The expansion diameter of the three fixed balloons is 10mm, significantly smaller than that of existing conventional balloons, only about 75% of the diameter of existing balloons. This effectively avoids friction between the balloons and plaque within the descending aorta, preventing them from becoming stuck due to stenosis.

[0029] Example 1: In this embodiment, the three fixed balloons include a first balloon 1, a second balloon 2, and a third balloon 3 arranged sequentially from the distal end to the proximal end of the catheter body. A tip 4 is also provided at the distal end of the catheter body, and the tip 4 is fixed to the distal end of the first balloon 1. Specifically, the first balloon 1, the second balloon 2, and the third balloon 3 have the same expansion diameter, and all three are equal-diameter balloons.

[0030] In this embodiment, the first balloon 1, the second balloon 2, and the third balloon 3 are connected in sequence, and an inflation chamber connected to one of the fixed balloons is provided inside the catheter body. With this configuration, after gas enters from the catheter body, it can sequentially fill all the first balloon 1, the second balloon 2, and the third balloon 3. Only one inflation channel needs to be provided inside the catheter, which can reduce the difficulty of structural fabrication.

[0031] In this embodiment, the outer walls of the first balloon 1, the second balloon 2, and the third balloon 3 are all coated with a wear-resistant coating. This design improves the structural strength of the balloon catheter and effectively reduces the risk of balloon rupture caused by plaque abrasion.

[0032] Example 2: The difference from Embodiment 1 is that in this embodiment, the expansion diameter of the first balloon 1 is smaller than that of the second balloon 2, and the expansion diameter of the second balloon 2 is smaller than that of the third balloon 3. This configuration adapts to the distally thinner, proximally thicker structure of the descending thoracic aorta, allowing for better fit to the vessel wall. The distal first balloon 1 preferentially passes through areas with thinner vessels and more plaque, thereby enhancing resistance to stenosis and plaque interference. The proximal third balloon 3 provides stable support in the thicker segment of the vessel, balancing overall passability and stability to improve post-catheter placement stability. Preferably, the expansion diameters of the first balloon 1, second balloon 2, and third balloon 3 all gradually increase from distal to proximal; that is, the first balloon 1, second balloon 2, and third balloon 3 are all variable-diameter balloons. This design allows the first balloon 1, the second balloon 2, and the third balloon 3 to better conform to the inner wall of the blood vessel and to distribute force more evenly during expansion. At the same time, this variable diameter structure from distal to proximal can improve the fixation effect of the balloon catheter in the blood vessel and enhance the stability after implantation.

[0033] Example 3: The difference from Embodiment 1 is that, in this embodiment, the expansion diameters of both the first balloon 1 and the third balloon 3 are larger than the expansion diameter of the second balloon 2. This arrangement allows the second balloon 2, with its smallest diameter located in the middle, to avoid vascular stenosis and plaque. The first balloon 1 and the third balloon 3, located distally and proximally respectively, enhance fixation and support, significantly improving the catheter's stability.

[0034] Example 4: The difference from Embodiment 1 is that in this embodiment, the first balloon 1, the second balloon 2, and the third balloon 3 are sequentially connected, and the catheter body has three inflation chambers respectively connected to the first balloon 1, the second balloon 2, and the third balloon 3. This arrangement, with the first balloon 1, the second balloon 2, and the third balloon 3 connected and all connected to the catheter body, allows for more uniform and rapid inflation. Only one inflation channel is needed, making the structure simpler and more reliable.

[0035] Example 5: The difference from Embodiment 1 is that in this embodiment, the first balloon 1, the second balloon 2, and the third balloon 3 are independently and spaced apart on the periphery of the catheter body. The catheter body contains three inflation chambers respectively connected to the first balloon 1, the second balloon 2, and the third balloon 3. This arrangement ensures that the first balloon 1, the second balloon 2, and the third balloon 3 are complementaryly connected, yet each is individually connected to the catheter body, allowing for independent inflation and deflation of each balloon without interference. Damage to one balloon will not affect the others, resulting in higher safety, resistance to damage, and reliability. Specifically, the interval between two adjacent balloons is 10mm.

[0036] In summary, this multi-balloon catheter, by spaced out with a first balloon 1, a second balloon 2, and a third balloon 3 on the catheter body, can form segmented contact with the descending aorta, thereby effectively dispersing the overall pressure of the catheter and significantly reducing the risk of plaque rupture of the balloons. The expansion diameter of the first balloon 1, the second balloon 2, and the third balloon 3 is 10mm, which is significantly smaller than that of existing conventional balloons, only about 75% of the diameter of existing balloons. This effectively avoids friction between the balloons and plaque in the descending aorta, preventing them from becoming stuck due to stenosis.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A multi-balloon catheter, characterized in that, Suitable for placement within the descending aorta and close to the renal artery, the catheter includes a catheter body and at least three spaced-apart fixation balloons communicating with the periphery of the catheter body. The catheter body has an inflation chamber communicating with at least one of the fixation balloons. The three fixation balloons are arranged axially along the catheter body, and each of the three fixation balloons has an inflated state and a contracted state. The diameter of a single fixation balloon in the inflated state is 8mm-12mm.

2. The multi-balloon catheter according to claim 1, characterized in that, The three fixed balloons include a first balloon (1), a second balloon (2) and a third balloon (3) arranged sequentially from the distal end to the proximal end of the catheter body. The distal end of the catheter body is also provided with a head end (4), which is fixed to the distal end of the first balloon (1).

3. The multi-balloon catheter according to claim 2, characterized in that, The first balloon (1), the second balloon (2), and the third balloon (3) have the same expansion diameter.

4. The multi-balloon catheter according to claim 2, characterized in that, The expansion diameter of the first balloon (1) is smaller than that of the second balloon (2), and the expansion diameter of the second balloon (2) is smaller than that of the third balloon (3).

5. The multi-balloon catheter according to claim 4, characterized in that, The expansion diameters of the first balloon (1), the second balloon (2), and the third balloon (3) gradually increase from the distal end to the proximal end.

6. The multi-balloon catheter according to claim 2, characterized in that, The expansion diameters of the first balloon (1) and the third balloon (3) are both greater than the expansion diameter of the second balloon (2).

7. The multi-balloon catheter according to claim 2, characterized in that, The first balloon (1), the second balloon (2), and the third balloon (3) are connected in sequence, and an inflation chamber connected to one of the fixed balloons is provided in the catheter body.

8. The multi-balloon catheter according to claim 2, characterized in that, The first balloon (1), the second balloon (2), and the third balloon (3) are sequentially connected. The catheter body has three inflation chambers that are respectively connected to the first balloon (1), the second balloon (2), and the third balloon (3).

9. The multi-balloon catheter according to claim 2, characterized in that, The first balloon (1), the second balloon (2), and the third balloon (3) are independently spaced around the periphery of the catheter body, and the catheter body has three inflation chambers that are respectively connected to the first balloon (1), the second balloon (2), and the third balloon (3).

10. The multi-balloon catheter according to claim 9, characterized in that, The interval between two adjacent fixed balloons is 5mm-15mm.

Images