Balloon catheter device

Abstract

This invention provides a balloon catheter device, comprising a catheter body and a balloon assembly disposed at the distal end of the catheter body. The catheter body has a fluid-permeable cavity extending along its own axial direction, and the inner cavity of the balloon assembly communicates with the fluid-permeable cavity. The catheter body includes an outer tube and an inner tube coaxially arranged, the outer tube being sleeved outside the inner tube, the distal end of the outer tube being connected to the proximal end of the balloon assembly, and the inner tube penetrating the balloon assembly. The balloon assembly includes multiple balloons spaced apart along the axial direction of the inner tube, and a tubular segment is provided between any two adjacent balloons. The inner diameter of the tubular segment is smaller than the inner diameter of the balloons but larger than the outer diameter of the inner tube. This invention utilizes multiple adjacent balloons and the tubular segments disposed between adjacent balloons to constrain the deformation of the inner tube, effectively extending the working length of the balloon catheter device.

Description

Technical Field

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

[0002] Vascular calcification is primarily a narrowing and hardening of blood vessels caused by plaque accumulation. Plaques are composed of fibrous tissue, fat, and calcium salts. Accumulated calcified plaques obstruct normal blood flow, leading to insufficient supply of oxygen and nutrients to the body, severely impacting the patient's health.

[0003] Based on this, a new technology has recently emerged—by inserting a catheter containing a balloon into the blood vessel, the balloon inflates at the lesion site, and electrodes installed inside the balloon activate to perform an electric arc discharge, releasing a high-voltage pulse. This causes the gas bubble to rapidly expand and rupture, generating a shock wave. The shock wave propagates through the liquid medium and impacts the calcified areas within the blood vessel through the balloon wall, breaking up the calcified material, restoring the blood vessel's elasticity, and reshaping the diseased vessel, while avoiding damage to the vessel's inner wall / intima.

[0004] Current technologies treat intravascular calcified plaques by generating shock waves within the body. This requires producing high-voltage pulses that cause bubbles to form inside the balloon. The energy released when these bubbles burst acts on the balloon wall, thereby targeting the calcified lesion. However, in cases of severe deformities, the cylindrical balloon design in current technologies can lead to significant eccentricity of the catheter's inner tube. This can cause the discharge electrode, located above the inner tube, to come into contact with the balloon's inner wall, resulting in the high voltage generated by the discharge acting directly on the balloon's inner wall. This can cause the balloon to puncture, potentially even endangering the patient. Furthermore, current technologies typically use relatively short balloons. For treating long lesions, short balloons are required to treat the lesion segment by segment, prolonging the procedure and increasing surgical risks.

[0005] To address these issues, it is necessary to develop an intravascular shockwave therapy device and balloon catheter system that can minimize or eliminate severe eccentricity of the balloon catheter relative to the balloon caused by the stress exerted by the malformed calcified lesion, while also extending the working length of the balloon relative to the calcified lesion to reduce surgical time. Summary of the Invention

[0006] The purpose of this invention is to provide a balloon catheter device that uses multiple adjacent balloons and a tubing segment disposed between adjacent balloons to constrain the deformation of the inner tube, thereby effectively extending the working length of the balloon catheter device.

[0007] To achieve the above objectives, the present invention provides a balloon catheter device, comprising a catheter body and a balloon assembly disposed at the distal end of the catheter body. The catheter body has a fluid passage chamber extending along its own axial direction, and the inner cavity of the balloon assembly communicates with the fluid passage chamber. The catheter body includes an outer tube and an inner tube arranged coaxially, the outer tube being sleeved outside the inner tube, the distal end of the outer tube being connected to the proximal end of the balloon assembly, and the inner tube penetrating the balloon assembly. The balloon assembly includes a plurality of balloons spaced apart along the axial direction of the inner tube, and a tube segment is provided between any two adjacent balloons, the inner diameter of the tube segment being smaller than the inner diameter of the balloons and larger than the outer diameter of the inner tube.

[0008] Optionally, the pipe section is made of a non-compliant material.

[0009] Optionally, the pipe section is fitted with an elastic element.

[0010] Optionally, at least one of the balloons in the balloon assembly includes a first sub-balloon and a second sub-balloon disposed on both radial sides of the inner tube, and the fluid passage cavity includes a first sub-fluid passage cavity and a second sub-fluid passage cavity, wherein the first sub-fluid passage cavity communicates with the inner cavity of the first sub-balloon, and the second sub-fluid passage cavity communicates with the inner cavity of the second sub-balloon.

[0011] Optionally, at least one of the first sub-balloon and the second sub-balloon is provided with a shock wave emitting element, which is electrically connected to a high-voltage generator.

[0012] Optionally, the second sub-balloon and the second sub-fluid-permeable cavity are used to inject contrast agent.

[0013] Optionally, each of the balloons has a first groove on its outer surface that extends through both ends of the balloon along its axial direction.

[0014] Optionally, the first groove is set at an angle to the axis of the balloon, so that the first grooves on the plurality of balloons can be arranged in a spiral shape.

[0015] Optionally, the outer diameter of the tube segment is smaller than the outer diameter of the balloon, so as to form a second groove between the tube segment and the two balloons connected thereto, wherein the first groove communicates with the second groove.

[0016] Optionally, the outer surface of the balloon is provided with a drug coating.

[0017] The balloon catheter device provided by this invention has the following beneficial effects:

[0018] The balloon catheter device provided by the present invention includes a catheter body and a balloon assembly disposed at the distal end of the catheter body. The catheter body has a fluid passage chamber extending along its own axial direction, and the inner cavity of the balloon assembly communicates with the fluid passage chamber. The catheter body includes an outer tube and an inner tube arranged coaxially. The outer tube is sleeved outside the inner tube, and the distal end of the outer tube is connected to the proximal end of the balloon assembly. The inner tube penetrates the balloon assembly. The balloon assembly includes a plurality of balloons spaced apart along the axial direction of the inner tube. A tube segment is provided between any two adjacent balloons. The inner diameter of the tube segment is smaller than the inner diameter of the balloons and larger than the outer diameter of the inner tube. Therefore, by providing a segment between any two adjacent balloons, the present invention can segmentally constrain the inner tube, thereby reducing or eliminating severe eccentricity of the inner tube relative to the balloon assembly caused by the stress exerted by abnormal calcified lesions. This allows for an effective extension of the working length of the balloon catheter device with the same amount of deformation, thus saving surgical time and reducing surgical risks when treating long lesions. Furthermore, segmenting the inner tube by the segment reduces the possibility of direct contact between the inner tube and the inner wall of the balloon, effectively preventing the shock wave emitting element located within the balloon from directly contacting the body and discharging electrical signals after balloon rupture, thereby improving the safety of the balloon catheter device provided by the present invention during use. Attached Figure Description

[0019] Figure 1 A cross-sectional view of a balloon catheter device provided in an embodiment of the prior art.

[0020] Figure 2 This is a cross-sectional view of a balloon catheter device provided in an embodiment of the present invention.

[0021] Figure 3 This is a cross-sectional view of the balloon assembly of a balloon catheter device provided in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram showing the positional relationship between the shock wave emitting element and the inner tube of a balloon catheter device provided in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram showing the positional relationship between the electrode and the inner tube of the shock wave emitting element of a balloon catheter device provided in an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram showing the positional relationship between the electrode and the inner tube of the shock wave emitting element of a balloon catheter device provided in another embodiment of the present invention.

[0025] Figure 7This is a schematic diagram showing the positional relationship between the first sub-balloon and the second sub-balloon of a balloon catheter device provided in an embodiment of the present invention.

[0026] Figure 8 This is a cross-sectional view of the catheter body of a balloon catheter device provided in an embodiment of the present invention.

[0027] Figure 9 A cross-sectional view of the balloon assembly of a balloon catheter device provided in another embodiment of the present invention.

[0028] The reference numerals in the attached figures are as follows:

[0029] Inner tube-01; developing ring-02;

[0030] Balloon assembly - 03; Balloon - 031; Tube section - 032; First sub-balloon - 0311; Second sub-balloon - 0322;

[0031] Shockwave emitting element-04; Electrode plate-0411; Opening-0412; Metal ring-0413; Insulating plate-0414; First electrode ring-0421; Cavity-0422; Second electrode ring-0423;

[0032] Outer tube-05; First sub-fluid passage chamber-051; Second sub-fluid passage chamber-052;

[0033] Connector-06; Wire-07; Circuit board-08; High voltage generator-09. Detailed Implementation

[0034] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of the invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.

[0035] It should be understood that when an element or layer is referred to as "on" or "connected to" other elements or layers, it may be directly on or connected to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on" or "directly connected to" other elements or layers, there are no intervening elements or layers. Although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this invention, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. Spatial relation terms such as "below," "under," "below," "above," "on top," "above," etc., may be used herein for convenience of description to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relational terms are intended to also include different orientations of the devices in use and operation. For example, if the devices in the figures are flipped, then elements or features described as “below,” “under,” or “below” will be oriented “on” other elements or features. Devices may be oriented additionally (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly. The terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “comprising” is used to identify the presence of features, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups. When used herein, the terms “and / or” include any and all combinations of the associated listed items.

[0036] In this invention, "distal end" refers to the end of the balloon catheter device that is away from the operator after it is inserted into the human body, and "proximal end" refers to the end of the balloon catheter device that is close to the operator after it is inserted into the human body.

[0037] Before introducing the balloon catheter device provided by this invention, we will first describe the balloon catheter devices in the prior art that have balloons with relatively long lengths. Please refer to... Figure 1 This is a cross-sectional view of a balloon catheter device provided in an embodiment of the prior art. For example... Figure 1 As shown, in the prior art, for the long balloon 031, the free end of the internal catheter body is too long, which is prone to bending deformation and severe eccentric displacement during use.

[0038] The core idea of ​​this invention is to provide a balloon catheter device to solve the problem that existing balloon catheter devices with long balloons are prone to bending deformation and severe eccentric displacement during use due to the excessive length of the free end of the catheter body inside.

[0039] To achieve the above objectives, the present invention provides a balloon catheter device, please refer to... Figure 2 and Figure 3 , Figure 2 This is a cross-sectional view of a balloon catheter device provided in an embodiment of the present invention. Figure 3 This is a cross-sectional view of the balloon assembly of a balloon catheter device according to an embodiment of the present invention. Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a balloon catheter device including a catheter body and a balloon assembly 03 disposed at the distal end of the catheter body. The catheter body has a fluid passage cavity extending along its own axial direction, and the inner cavity of the balloon assembly 03 communicates with the fluid passage cavity. The catheter body includes an outer tube 05 and an inner tube 01 coaxially disposed. The outer tube 05 is sleeved outside the inner tube 01 to form the fluid passage cavity between the outer tube 05 and the inner tube 01. The distal end of the outer tube 05 is connected to the proximal end of the balloon assembly 03, and the inner tube 01 penetrates the balloon assembly 03. The balloon assembly 03 includes a plurality of balloons 031 spaced apart along the axial direction of the inner tube 01. A tube segment 032 is provided between any two adjacent balloons 031. The inner diameter of the tube segment 032 is smaller than the inner diameter of the balloon 031 and larger than the outer diameter of the inner tube 01. The inner tube 01 penetrates the balloon assembly 03 by passing through the tube segment 032. Furthermore, the balloons 031 can be connected to each other via the tubing section 032.

[0040] Therefore, by providing a tube segment 032 between any two adjacent balloons 031, the present invention can segmentally constrain the inner tube 01, thereby reducing or eliminating severe eccentricity of the inner tube 01 relative to the balloon assembly caused by the stress exerted by abnormal calcified lesions. This allows for an effective extension of the working length of the balloon catheter device with the same amount of deformation, thus saving surgical time and reducing surgical risks when treating long lesions. Furthermore, segmenting the inner tube 01 with the tube segment 032 reduces the possibility of direct contact between the inner tube 01 and the inner wall of the balloon 031, effectively preventing the shock wave emitting element located inside the balloon from directly contacting the human body and discharging electrical signals after balloon rupture, thereby improving the safety of the balloon catheter device provided by the present invention during use.

[0041] In an exemplary embodiment, when the balloon catheter device is configured to perform therapeutic functions using the principle of shock wave emission, the balloon catheter device should also include accessories such as a shock wave emitting element 04, a contrast ring 02 (for displaying the position of the balloon 031), a connector 06, a wire 07, a circuit board 08, and a high-voltage generator 09, and each accessory should be electrically connected to each other to enable the release of shock waves for therapeutic operations, but this is not a limitation.

[0042] Preferably, the tube segment 032 is made of a non-compliant material. Therefore, when a conductive medium is injected into the balloon assembly 03, the tube segment 032 will not expand in the same way as the balloon 031, thus achieving a restraining effect. It should be noted that the restraining effect of the tube segment 032 can also be achieved by providing an elastic element over the tube segment 032, preventing it from expanding synchronously with the balloon 031. For example, a metal mesh, composed of interwoven metal wires, can be placed over the tube segment 032.

[0043] Please refer to Figure 4 , Figure 4 This is a schematic diagram showing the positional relationship between the shock wave emitting element 04 and the inner tube 01 of a balloon catheter device provided in an embodiment of the present invention. Figure 4 As shown, the shock wave emitting element 04 and the imaging ring 02 can be disposed on the inner tube 01. Furthermore, the shock wave emitting element 04 is disposed between the two imaging rings 02. Thus, this arrangement can optimize the internal structure of the balloon 031, achieve shock wave emission sufficiently and uniformly, and clearly display the position of the balloon 031.

[0044] For further details, please refer to... Figure 5 This is a schematic diagram showing the positional relationship between the electrode of the shock wave emitting element 04 and the inner tube 01 of a balloon catheter device provided in an embodiment of the present invention. Figure 5As shown, in this embodiment, the shock wave emitting element 04 includes an electrode plate 0411, an insulating sheet 0414, and a metal ring 0413. The electrode plate 0411 is disposed on the inner tube 01, and the insulating sheet 0414 is disposed between the metal ring 0413 and the electrode plate 0411, i.e., the metal ring 0413 is sleeved on the insulating sheet 0414. An opening 0412 is formed in the insulating sheet 0414, and an insulating material is applied to the end of the electrode plate 0411 along the axial direction of the inner tube 01. With this configuration, when using the balloon catheter device, a conductive medium is first injected into the balloon 031. Once the balloon 031 is filled with the conductive medium, it connects with the two electrode pads 0411 to form an electrical circuit. When energized, the two electrode pads 0411 in the same circuit are energized and can only release current radially into the balloon 031 through the opening 0412. The metal ring 0413 is also electrically connected to the electrode pads 0411 using the conductive medium. Therefore, the current released by the electrode pads 0411 is uniformly conducted and released circumferentially along the metal ring 0413 due to its structure, thus achieving uniform circumferential release of the energized shock waves into the balloon 031. It should be noted that an insulating layer can also be provided between the electrode pads 0411 and the inner tube 01 to prevent the electrode pads 0411 from damaging the inner tube 01 due to energization.

[0045] Preferably, the insulating sheet 0414 is made of PI (polyimide). Since PI (polyimide) has high insulation properties, high temperature resistance, and low dielectric loss, using PI (polyimide) to make the insulating sheet 0414 can further improve the safety of the balloon catheter device provided by the present invention during use.

[0046] Please continue to refer to this. Figure 6 This is a schematic diagram showing the positional relationship between the electrode of the shock wave emitting element 04 and the inner tube 01 of a balloon catheter device provided in another embodiment of the present invention. Figure 6As shown, in this embodiment, the shock wave emitting element 04 includes a first electrode ring 0421 and a second electrode ring 0423, both of which are sleeved on the inner tube 01. The first electrode ring 0421 and the second electrode ring 0423 do not contact each other; that is, a cavity 0422 is provided between them. With this configuration, when using the balloon catheter device, a conductive medium is first injected into the balloon 031. Once the balloon 031 is filled with the conductive medium, it connects the first electrode ring 0421 and the second electrode ring 0423 together to form an electrical circuit. Thus, when energized, the first electrode ring 0421 and the second electrode ring 0423 release current. Furthermore, since the first electrode ring 0421 and the second electrode ring 0423 are themselves ring-shaped structures, the shock waves generated by the energized circuit can be uniformly released radially into the balloon 031.

[0047] It should be noted that the spacing between the electrodes affects the discharge intensity. If the spacing is too small, the electrodes are prone to conduction, resulting in discharge at a lower voltage and weaker discharge energy. Conversely, if the spacing between the two electrodes is too large, the electrodes cannot conduct within the set discharge pulse width and duration, causing discharge failure. Therefore, the spacing between the two electrode pieces 0411 located in the same electrical circuit should be experimentally set to a suitable preset spacing, and the spacing between the first electrode ring 0421 and the second electrode ring 0423 located in the same electrical circuit should also be experimentally set to a suitable preset spacing.

[0048] Please refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram showing the positional relationship between the first sub-balloon 0311 and the second sub-balloon 0322 of a balloon catheter device provided in an embodiment of the present invention. Figure 8 This is a cross-sectional view of the catheter body of a balloon catheter device provided in an embodiment of the present invention. Figure 7 and Figure 8As shown, at least one balloon 031 in the balloon assembly 03 includes a first sub-balloon 0311 and a second sub-balloon 0322 disposed on both radially sides of the inner tube. The fluid passage chamber includes a first sub-fluid passage chamber 051 and a second sub-fluid passage chamber 052. The first sub-fluid passage chamber 051 communicates with the inner cavity of the first sub-balloon 0311, and the second sub-fluid passage chamber 052 communicates with the inner cavity of the second sub-balloon 031. This arrangement allows for separate control of the first sub-balloon 0311 and the second sub-balloon 0322, enabling each to perform different functions. It should be understood that the balloon assembly 03 may include at least one balloon 031 comprising a first sub-balloon 0311 and a second sub-balloon 0322 disposed on both radially sides of the inner tube. Alternatively, the balloon assembly 03 may include only one balloon 031, which includes a first sub-balloon 0311 and a second sub-balloon 0322 disposed on both radial sides of the inner tube.

[0049] In an exemplary embodiment, at least one of the first sub-balloon 0311 and the second sub-balloon 0322 is provided with a shock wave emitting element 04, which is electrically connected to the high-voltage generator 09. The second sub-balloon 0322 and the second sub-fluid passage chamber 052 are used to inject contrast agent to achieve localized imaging of the balloon 031. This allows for the control of the first sub-balloon 0311 and the second sub-balloon 0322 to achieve corresponding functions using different injected materials, enabling operators to more flexibly handle different usage scenarios. It should be noted that the first sub-balloon 0311 and the second sub-balloon 0322 can be fixed together by adhesive or other means, or form an integrated structure sharing a single balloon wall. The shock wave emitting element 04 can also be disposed on the inner tube 01 but simultaneously located within the cavity of the first sub-balloon 0311, or electrically connected to the high-voltage generator using the first sub-fluid passage chamber 051, but these are not limitations. During use, the first sub-fluid passage chamber 051 and the second sub-fluid passage chamber 052 are controlled respectively. Contrast agent is injected into the first sub-balloon 0311 for positioning, and conductive medium is injected into the second sub-balloon 0322 to achieve electrical connection. Once the balloon assembly is positioned at the lesion location, the high-voltage generator 09 is activated for treatment. Further, the shock wave emitting element 04 may be provided only in the first sub-balloon 0311, or optionally, the shock wave emitting element 04 may also be provided in the second sub-balloon 0322. Each shock wave emitting element 04 can be independently controlled, generating shock waves to pulverize calcified material for adjunctive treatment as needed. It should be understood that both the first sub-balloon 0311 and the second sub-balloon 0312 can be semi-compliant or compliant balloons. Preferably, the second sub-balloon 0322 is a semi-compliant or compliant balloon, and the first sub-balloon 0311 is a non-compliant balloon. The fixation effect is adjusted by the degree of expansion of the second sub-balloon 0322, so as to ensure that the first sub-balloon 0311 is effectively attached to the treatment site while preventing the balloon 031 from contacting the transmitting element 04, thereby ensuring the treatment effect.

[0050] Preferably, multiple ribs can be provided on the outer surface of each balloon 031, and a first groove can be formed between two adjacent ribs, penetrating both ends of the axial direction of the balloon 031. This allows blood to continue flowing through the first groove when the balloon 031 inflates and abuts against the inner wall of the blood vessel, reducing blood obstruction. Furthermore, the ribs are angled to the axis of the balloon 031, so that the first grooves on the multiple balloons 031 can be arranged in a spiral pattern. If the first groove is not a spiral groove extending along the axial direction of the balloon 031, but rather a straight groove, then when the balloon 031 moves axially, the surface of the balloon 031 in the area of ​​the straight groove will not be in contact with the inner wall of the blood vessel. Lesions in this area cannot be effectively treated, and this problem can only be solved by rotating the balloon assembly 03. However, rotation should be avoided as much as possible during balloon treatment. When the first groove is set as a spiral groove extending along the axial direction of the balloon 031, while ensuring that blood flows along the first groove, the axial movement of the balloon assembly 03 can achieve full contact with the inner wall of the blood vessel, making the operation of the balloon catheter device more convenient.

[0051] Please refer to Figure 9 , Figure 9 This is a cross-sectional view of the balloon assembly 03 of a balloon catheter device provided in another embodiment of the present invention. Figure 9 As shown, the outer diameter of the tube segment 032 is smaller than the outer diameter of the balloon 03, so as to form a second groove between the tube segment 032 and the two balloons 03 connected thereto. The first groove is connected to the second groove. The second groove formed in the external space of the tube segment 032 can be connected to the first groove, and the tube segment 032 can also be spirally shaped so that its extension direction is the same as that of the first groove, so as to provide space for blood flow while the tube segment 032 plays a restraining role.

[0052] Preferably, the outer surface of the balloon 031 is coated with a drug-eluting layer. When the balloon catheter device is used for treatment, the drug on the coating can be dislodged by shockwave vibration according to the operator's operation, enabling targeted treatment of the lesion. Furthermore, the blood flow pathway constructed by the second groove on the balloon assembly 03 can greatly alleviate distal ischemia, further extend the intervention time, allow for more complete drug administration, and produce better therapeutic effects.

[0053] In summary, the balloon catheter device provided by the present invention has the following advantages:

[0054] 1. This invention, by providing a tube segment 032 between any two adjacent balloons 031, can segmentally constrain the inner tube 01. This reduces or eliminates severe eccentricity of the inner tube 01 relative to the balloon assembly caused by stress from deformed calcified lesions. Consequently, it effectively extends the working length of the balloon catheter device with the same amount of deformation, thus saving surgical time and reducing surgical risks when treating long lesions. Furthermore, segmenting the inner tube 01 with the tube segment 032 reduces the possibility of direct contact between the inner tube 01 and the inner wall of the balloon 031. This effectively prevents the shock wave emitting element inside the balloon from directly contacting the human body and discharging electrical signals after balloon rupture, thereby improving the safety of the balloon catheter device provided by this invention during use.

[0055] 2. The balloon assembly 03 has multiple ribs on the outer surface of each balloon 031, and a first groove is formed between two adjacent ribs, penetrating both ends of the balloon 031 axially. Furthermore, the outer diameter of the tube section 032 is smaller than the outer diameter of the balloon 03, so that a second groove is formed between the tube section 032 and the two balloons 03 connected thereto, and the first groove communicates with the second groove. This effectively forms a balloon with an externally threaded configuration. Compared to the most traditional cylindrical balloon, adjusting the appropriate proximal and distal angles and effective length of the balloon allows for maintaining blood flow during treatment, preventing safety hazards caused by ischemia, and reducing surgical risks.

[0056] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0057] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the scope of protection of the present invention.

[0058] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0059] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. And the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A balloon catheter device, characterized in that, The balloon catheter device includes a catheter body and a balloon assembly located at the distal end of the catheter body. The catheter body has a fluid passage chamber extending along its own axis, and the inner cavity of the balloon assembly communicates with the fluid passage chamber. The catheter body includes an outer tube and an inner tube arranged coaxially. The outer tube is sleeved outside the inner tube. The distal end of the outer tube is connected to the proximal end of the balloon assembly. The inner tube penetrates the balloon assembly. The balloon assembly includes multiple balloons spaced apart along the axial direction of the inner tube. A tube segment is provided between any two adjacent balloons, and the balloons are connected through the tube segment. The inner diameter of the tube segment is smaller than the inner diameter of the balloon and larger than the outer diameter of the inner tube. The pipe section is made of a non-compliant material; or, the pipe section is fitted with an elastic element.

2. The balloon catheter device as claimed in claim 1, characterized in that, At least one of the balloons in the balloon assembly includes a first sub-balloon and a second sub-balloon disposed on both radial sides of the inner tube. The fluid passage includes a first sub-fluid passage and a second sub-fluid passage. The first sub-fluid passage communicates with the inner cavity of the first sub-balloon, and the second sub-fluid passage communicates with the inner cavity of the second sub-balloon.

3. The balloon catheter device as described in claim 2, characterized in that, At least one of the first sub-balloon and the second sub-balloon is provided with a shock wave emitting element, which is electrically connected to a high-voltage generator.

4. The balloon catheter device as described in claim 3, characterized in that, The second sub-balloon and the second sub-fluid-through chamber are used to inject contrast agent.

5. The balloon catheter device as claimed in claim 1, characterized in that, Each of the balloons has a first groove on its outer surface that extends through both ends of the balloon along its axial direction.

6. The balloon catheter device as claimed in claim 5, characterized in that, The first groove is set at an angle to the axis of the balloon, so that the first grooves on the plurality of balloons can be arranged in a spiral shape.

7. The balloon catheter device as described in claim 5 or 6, characterized in that, The outer diameter of the tube segment is smaller than the outer diameter of the balloon, so as to form a second groove between the tube segment and the two balloons connected thereto, and the first groove is connected to the second groove.

8. The balloon catheter device as claimed in claim 1, characterized in that, The outer surface of the balloon is coated with a drug.

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