Balloon catheter

By placing a balloon at the distal end of the catheter and injecting fluid through the injection channel to inflate it and anchor it to the vessel wall, the problems of catheter passage and stability in tortuous blood vessels are solved, and efficient and reliable operation of the catheter in interventional therapy is achieved.

CN119280623AInactive Publication Date: 2025-01-10JINGZHOU FIRST PEOPLES HOSPITAL
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Patent Information

Application Number
CN202411494689.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-24
Publication Date
2025-01-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing delivery catheters cannot balance flexibility and support, making it difficult to pass through tortuous blood vessels and achieve stable positioning during interventional treatment, increasing surgical risks and complications.

Method used

A balloon catheter is designed to inflate multiple balloons at the distal end of the catheter by injecting fluid through the injection channel to increase the outer diameter of the distal end of the catheter, thereby anchoring it to the vessel wall, providing support, and maintaining flexibility when needed to pass through tortuous vessels.

Benefits of technology

It improves the permeability and stability of catheters in tortuous blood vessels, reduces the probability of catheter retraction, enhances the reliability of therapeutic device delivery, and reduces surgical risks and patient suffering.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a balloon catheter, and belongs to the technical field of interventional operation medical instruments. The balloon catheter comprises a catheter body, a balloon and an injection channel, wherein the catheter body is provided with a catheter cavity for establishing the channel; the multiple balloons are axially arranged at the far end of the catheter body at intervals; the injection channels are arranged on the catheter body and extend in the axial direction of the catheter body, and the far end of each injection channel is at least used for being communicated with one balloon; injecting fluid into the injection channel from the near end of the injection channel, and filling the balloon with the fluid along the injection channel to increase the outer diameter of the far end of the catheter body, so that the far end of the catheter body is anchored on the blood vessel wall; the conveying catheter is used for solving the technical problem that an existing conveying catheter cannot give consideration to flexibility and supporting performance.
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Description

Technical Field

[0001] The invention belongs to the technical field of interventional surgery medical instruments, and in particular relates to a balloon catheter. Background Art

[0002] Interventional surgery is a surgery in which guide wires, catheters and other instruments are introduced into the corresponding parts of the human body for diagnosis and treatment under the guidance of imaging equipment. It has the advantages of small local trauma, quick recovery, good effect, few side effects and high precision. It can be used for diseases such as vascular lesions, tumors, and bleeding. Its application scope is now becoming more and more extensive, and good therapeutic effects have been achieved.

[0003] For example, in the process of neurological interventional surgery, a guide catheter is generally used to establish a channel first, and then the suction or thrombectomy system is introduced into the blood vessel along the channel to open the occluded blood vessel. For the treatment of ischemic and hemorrhagic stroke with tortuous intracranial vessels, a distal access catheter is required to deliver microcatheters and coils and other therapeutic devices directly to the diseased blood vessels. In the process of establishing the access, because the distal end of the catheter needs to advance along the curved blood vessels, the distal end of the catheter needs good flexibility, but later when the therapeutic device is delivered into the channel, the catheter needs to be supportive. For example, the treatment of severe vascular tortuosity and complex aneurysms requires the catheter to provide higher support and better compliance. Therefore, during the interventional treatment process, a distal access catheter is needed, which can not only meet the distal flexibility of the catheter, making it easier to reach the distal end along the tortuous blood vessels than ordinary guide catheters, but also provide sufficient support after the distal end is in place to prevent the catheter from going down when delivering the device.

[0004] Therefore, a distal access catheter product is needed that takes into account the advantages of distal support and distal passability, optimizes the patency and support of the transition zone, and makes it more stable for interventional doctors to pass the device through the torso to the brain, and can solve the problem of difficult to cross tortuous blood vessels near the lesion. This will reduce various complications and the risk of catheter bending during the operation. However, existing catheters cannot achieve both good flexibility and support.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a balloon catheter to solve the technical problem that the existing delivery catheter cannot take into account both flexibility and support.

[0007] In order to achieve the above object, the balloon catheter of the present invention provides the following technical solutions:

[0008] A balloon catheter, comprising:

[0009] a catheter body having a lumen for establishing a passage;

[0010] A balloon, a plurality of the balloons are axially spaced and arranged at the distal end of the catheter body;

[0011] An injection channel, the injection channel is arranged on the catheter body and extends axially along the catheter body, and the distal end of each injection channel is used to communicate with at least one of the balloons;

[0012] Fluid is injected into the injection channel from the proximal end of the injection channel, and the fluid fills the balloon along the injection channel to increase the outer diameter of the distal end of the catheter body, so that the distal end of the catheter body is anchored on the blood vessel wall.

[0013] As a further optimized technical solution, the catheter body includes at least a protective layer, a supporting layer and a guiding layer from the outside to the inside.

[0014] As a further optimized technical solution, an operating handle is provided at the proximal end of the catheter body, and the operating handle has a main joint and multiple branch joints. The main joint is arranged on the extension line of the catheter body, and the main joint is connected to the lumen, and each branch joint is used to connect to one of the injection channels.

[0015] As a further optimized technical solution, the balloon is integrally arranged on the outer side wall of the protective layer, and a filling hole is arranged at the distal end of each injection channel, and the filling hole is used to connect the injection channel with the inner cavity of the corresponding balloon.

[0016] As a further optimized technical solution, the injection channel is arranged on the protective layer.

[0017] As a further optimized technical solution, four balloons are provided, and two injection channels are provided, and the distal end of each injection channel is used to connect two balloons.

[0018] As a further optimized technical solution, a stress diffusion tube is provided at the distal end of the operating handle, and the stress diffusion tube is sleeved on the outside of the catheter body.

[0019] As a further optimized technical solution, the fluid is physiological saline or gas.

[0020] As a further optimized technical solution, a developing component (6) is provided at the distal end of the catheter body.

[0021] As a further optimized technical solution, the developing component is a developing ring, and the developing ring is coaxially arranged with the catheter body.

[0022] Beneficial effects: By using the technical solution of the present invention, the distal end of the catheter body has good flexibility under normal circumstances, and the catheter body has good blood vessel bending ability, so it is convenient to pass through tortuous blood vessels. When the catheter body reaches the set position, the radial size of the distal end of the catheter can be increased by filling the balloon, so that the distal end of the catheter body is anchored on the blood vessel wall, so that it is not easy to withdraw when passing other therapeutic devices; in addition, the filled balloon also increases the wall thickness of the catheter body, thereby increasing the support of the catheter body and further facilitating the passage of therapeutic devices. The probability of the catheter body withdrawing and sliding down when passing the device is reduced, thereby making the clinical operation more convenient and reliable, saving manpower and material resources, and alleviating the pain of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0024] Figure 1 A schematic diagram of the overall structure of a balloon catheter according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a catheter body according to an embodiment of the present invention;

[0026] Figure 3 for Figure 2 A schematic cross-sectional view of the AA portion;

[0027] Figure 4 for Figure 2 A schematic cross-sectional view of the middle BB portion;

[0028] Figure 5 for Figure 2 A schematic cross-sectional view of the CC section;

[0029] Figure 6 This is a schematic diagram of the balloon status according to an embodiment of the present invention.

[0030] In the figure: 1. operating handle; 11. main joint; 12. branch joint; 2. stress diffusion tube; 3. catheter body; 31. guide layer; 32. support layer; 33. protective layer; 34. injection channel; 4. filling hole; 5. balloon; 6. developing component. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0032] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] The present invention provides a balloon catheter. A balloon is arranged at the distal end of a catheter body. The balloon clings to the outer wall of the catheter in an unfilled state, so that the distal end of the catheter body has good blood vessel bending ability. When the distal end of the catheter body reaches a specified position, the balloon is filled. The balloon has an anchoring effect after being filled, so that the distal end of the catheter body is fixed in the blood vessel, the supporting force of the distal end of the catheter body is increased, and the problem of withdrawal does not occur when passing other instruments.

[0035] Example 1

[0036] like Figure 1 , Figure 2 , Figure 6 As shown, the balloon catheter includes a catheter body 3 , a balloon 5 and an injection channel 34 .

[0037] The catheter body 3 includes a protective layer 33, a support layer 32 and a guide layer 31 from the outside to the inside. The inner cavity of the guide layer 31 constitutes a lumen for establishing a channel, and the lumen is used to transport therapeutic instruments during surgical operations. The protective layer 33 is a polymer material layer, and the support layer 32 is a braided layer or a winding layer made of metal material, which is used to increase the support performance of the catheter body 3. In other implementations, the catheter body 3 can also be provided with a three-layer structure of more than the protective layer 33, the support layer 32 and the guide layer 31, which can be specifically provided according to actual needs.

[0038] A plurality of balloons 5 are arranged axially at intervals at the distal end of the catheter body 3. The balloons 5 are attached to the outer wall of the catheter body 3 in a normal unfilled state. When the distal end of the catheter body 3 reaches a designated position, the balloons 5 can be filled to anchor the distal end of the catheter body 3.

[0039] Specifically, the inflation and deflation of the balloon 5 is controlled through the injection channel 34. The injection channel 34 is provided on the catheter body 3 and extends axially along the catheter body 3. The distal end of each injection channel 34 is used to communicate with at least one balloon 5.

[0040] In this embodiment, four balloons 5 are provided, and two injection channels 34 are provided independently of each other. The distal end of each injection channel 34 is used to connect two balloons 5, so that the number of balloons 5 at the distal end of the catheter body 3 that can be filled simultaneously is zero, two, or four. The specific number of balloons 5 to be filled can be selected according to the anchoring degree of the balloons 5 during the actual operation to ensure the fixing degree of the distal end of the catheter body 3 and the blood vessel.

[0041] Specifically during operation, when the distal end of the catheter body 3 reaches the specified position, fluid is injected into the injection channel 34 from the proximal end of the injection channel 34, and the fluid fills the balloon 5 along the injection channel 34 to increase the outer diameter of the distal end of the catheter body 3, so that the distal end of the catheter body 3 is anchored on the blood vessel wall.

[0042] In this embodiment, the fluid is physiological saline. In other embodiments, it can also be gas or gas fluid that meets the use requirements.

[0043] Furthermore, an operating handle 1 is provided at the proximal end of the catheter body 3, and the operating handle 1 has a main joint 11 and a plurality of branch joints 12. The main joint 11 is provided on the extension line of the catheter body 3, and the main joint 11 is connected to the lumen, and each branch joint 12 is used to connect to an injection channel 34. Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the proximal end of the catheter body 3 penetrates into the operating handle 1 , the main connector of the operating handle 1 is used to transport the therapeutic device into the lumen, and the two branch connectors 12 are respectively connected to an injection channel 34 for filling and discharging physiological saline into the injection channel 34 .

[0044] In this embodiment, the balloon 5 is integrally arranged on the outer side wall of the protective layer 33, and a filling hole 4 is arranged at the distal end of each injection channel 34, and the filling hole 4 is used to connect the injection channel 34 with the inner cavity of the corresponding balloon 5. Physiological saline is injected into the injection channel 34 from the proximal end, and the physiological saline flows along the injection channel 34 to the distal end, and when it reaches the position of the filling hole 4, it flows into the inner cavity of the balloon 5 through the filling hole 4, thereby filling the balloon 5.

[0045] In this embodiment, the injection channel 34 is opened on the protective layer 33. In other embodiments, the injection channel 34 can be opened on the guide layer 31, or the injection channel 34 with a tubular structure can be directly arranged outside the protective layer 33.

[0046] Furthermore, a stress diffusion tube 2 is provided at the distal end of the operating handle 1 , and the stress diffusion tube 2 is sleeved on the outside of the catheter body 3 .

[0047] Furthermore, in order to facilitate the operator to timely observe the position of the catheter body 3 during the surgical operation, a developing component 6 is provided at the distal end of the catheter body 3 .

[0048] In this embodiment, the developing component 6 is a developing ring, and the developing ring is coaxially arranged with the catheter body 3 .

[0049] How this solution works:

[0050] When it is necessary to establish a channel with the catheter body 3, the balloon 5 is completely attached to the catheter body 3. At this time, the catheter body 3 has good flexibility and bending ability. After the distal end of the catheter body 3 is placed at the specified position, physiological saline is introduced into the injection channel 34 through the branch joint 12 on the operating handle 1 to fill the balloon 5. After the balloon 5 is filled, the outer diameter of the distal end of the catheter body 3 can be increased, so that the distal end 3 of the catheter body is anchored on the blood vessel wall, and the wall thickness of the catheter body 3 is also increased, thereby increasing the support performance of the catheter body 3. Then, the treatment device is introduced into the set position through the main joint 11 on the operating handle 1. Since the distal end of the catheter body 3 is anchored in the blood vessel and the supporting force of the distal end of the catheter body 3 is increased, the catheter body 3 does not have a pullback problem when passing other devices.

[0051] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A balloon catheter, characterized in that: include: A catheter body (3), the catheter body (3) having a lumen for establishing a channel; A balloon (5), wherein a plurality of the balloons (5) are axially spaced and arranged at the distal end of the catheter body (3); An injection channel (34), the injection channel (34) being arranged on the catheter body (3) and extending axially along the catheter body (3), and the distal end of each injection channel (34) being used to communicate with at least one of the balloons (5); Fluid is injected into the injection channel (34) from the proximal end thereof, and the fluid fills the balloon (5) along the injection channel (34) to increase the outer diameter of the distal end of the catheter body (3), so that the distal end of the catheter body (3) is anchored on the blood vessel wall.

2. The balloon catheter according to claim 1, characterized in that: The catheter body (3) comprises at least a protective layer (33), a supporting layer (32) and a guiding layer (31) from the outside to the inside.

3. The balloon catheter according to claim 1, characterized in that: An operating handle (1) is provided at the proximal end of the catheter body (3), and the operating handle (1) has a main joint (11) and a plurality of branch joints (12). The main joint (11) is provided on the extension line of the catheter body (3), and the main joint (11) is connected to the lumen, and each branch joint (12) is used to connect to one of the injection channels (34).

4. The balloon catheter according to claim 2, characterized in that: The balloon (5) is integrally arranged on the outer wall of the protective layer (33), and a filling hole (4) is arranged at the distal end of each injection channel (34), and the filling hole (4) is used to connect the injection channel (34) with the inner cavity of the corresponding balloon (5).

5. The balloon catheter according to claim 4, characterized in that: The injection channel (34) is arranged on the protective layer (33).

6. The balloon catheter according to claim 4, characterized in that: Four balloons (5) are provided, and two injection channels (34) are provided. The distal end of each injection channel (34) is used to connect two balloons (5).

7. The balloon catheter according to claim 3, characterized in that: A stress diffusion tube (2) is provided at the distal end of the operating handle (1), and the stress diffusion tube (2) is sleeved on the outside of the catheter body (3).

8. The balloon catheter according to any one of claims 1 to 6, characterized in that: The fluid is physiological saline or gas.

9. The balloon catheter according to any one of claims 1 to 6, characterized in that: A developing component (6) is provided at the distal end of the catheter body (3).

10. The balloon catheter according to claim 9, characterized in that: The developing component (6) is a developing ring, and the developing ring is coaxially arranged with the catheter body (3).