Balloon dilatation catheter

Abstract

The utility model discloses a balloon dilatation catheter which comprises a catheter body, a balloon and a connecting assembly, the balloon is arranged at one end of the catheter body and composed of a balloon wall of a multi-layer structure, and when the balloon is pressurized and dilated, the balloon wall extends along with pressurization of the balloon; the connecting assembly is arranged at the other end of the tube body and communicated with the balloon so that liquid can flow into the balloon to be pressurized. Normal saline and the like can be injected into the balloon through the connecting assembly and the tube body for pressurization, so that the balloon wall can be forced to extend and stretch when the balloon is pressurized and expanded, the balloon wall of a multi-layer structure can ensure better ductility, and the anchoring performance is better after the balloon is expanded.

Description

Technical Field

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

[0002] A balloon dilation catheter is a flexible catheter with an inflatable balloon at its tip, used to dilate narrowed hollow organs in the body, such as blood vessels, the digestive tract, and the urinary tract, under image guidance. The balloon catheter is inserted into the target lesion site without inflation, and once reached, the balloon is inflated. In existing technologies, the balloon in balloon dilation catheters has poor extensibility during inflation and insufficient balloon anchoring. Utility Model Content

[0003] This utility model aims to at least partially solve at least one technical problem in the related art. To this end, embodiments of this utility model provide a balloon dilation catheter, comprising:

[0004] tube body;

[0005] A balloon, located at one end of the tube, and composed of a multi-layered balloon wall, extends as the balloon expands under pressure when it is pressurized and inflated.

[0006] A connecting component is located at the other end of the tube and is connected to the balloon to allow liquid to flow into the balloon and pressurize it.

[0007] Preferably, the capsule wall includes an extension layer and a hydrophilic layer, wherein the hydrophilic layer is coated in a ring shape on the outside of the extension layer and is spaced apart along the length of the capsule wall.

[0008] Preferably, the extension layer is composed of multiple intersecting connecting parts, and multiple extension holes are formed between the multiple connecting parts.

[0009] Preferably, the thickness of the extension layer is 0.12mm-0.25mm, and the thickness of the hydrophilic layer is 0.02-0.04mm.

[0010] Preferably, the extension layer and the tube body are made of polymer materials.

[0011] Preferably, the spacing between the hydrophilic layers is 0.7mm-1.2mm.

[0012] Preferably, the connecting component includes a first connecting port and a second connecting port, the first connecting port being connected to the pipe body and coaxially arranged, the second connecting port being connected to the pipe body, and the two forming an included angle at a predetermined angle.

[0013] Preferably, the second connection port has an inlet end and an outlet end, and the diameter from the inlet end to the outlet end is configured to gradually decrease.

[0014] Preferably, the inner diameter of the tube is the same as the minimum diameter of the discharge end.

[0015] Preferably, the predetermined angle is 30-45 degrees.

[0016] The above-described solutions provided by the embodiments of this utility model have at least the following beneficial effects:

[0017] The balloon dilation catheter can be pressurized by injecting saline solution into the balloon through the connecting components and the tube body. When the balloon is inflated, it forces the balloon wall to stretch. The multi-layered structure of the balloon wall can ensure better extensibility and better anchoring after the balloon is inflated.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a balloon dilation catheter provided in one embodiment of the present invention;

[0021] Figure 2 yes Figure 1 The sectional view shown.

[0022] Explanation of icon numbers:

[0023] 10. Tube body; 20. Balloon; 21. Balloon wall; 211. Extension layer; 212. Hydrophilic layer; 30. Connecting assembly; 31. First connection port; 32. Second connection port; 321. Inlet section; 322. Outlet section.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0027] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, 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 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 utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "proximal" and "proximal" refer to the end or side that is closer to the operator and further away from the patient; the terms "distal" and "distal" refer to the end or side that is further away from the operator and closer to the operator.

[0031] The balloon dilation catheter of an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] Reference Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a balloon dilation catheter, including: a tube body 10, a balloon 20, and a connecting component 30. The balloon 20 is located at the distal end of the tube body 10 and is composed of a multi-layered balloon wall 21. When the balloon 20 is pressurized and dilated, the balloon wall 21 extends with the increased pressure of the balloon 20. The connecting component 30 is located at the proximal end of the tube body 10 and is connected to the balloon 20 to allow liquid to flow into the balloon 20 and increase pressure.

[0033] The balloon dilation catheter provided in this embodiment can be pressurized by injecting saline or other substances into the balloon 20 through the connecting component 30 and the tube body 10. When the balloon 20 is pressurized and expanded, the balloon wall 21 can be forced to stretch. The multi-layered balloon wall 21 can ensure better extensibility and better anchoring after the balloon 20 is expanded.

[0034] In this embodiment, the balloon wall 21 includes an extension layer 211 and a hydrophilic layer 212. The hydrophilic layer 212 is annularly coated on the outside of the extension layer 211 and spaced apart along the length of the balloon wall 21 (i.e., the axial direction of the balloon dilation catheter). Upon pressurization, the extension layer 211 can stretch, allowing the balloon 20 to be anchored at the lesion site. Because the hydrophilic layer 212 is spaced apart on the surface of the balloon wall 21, the anchoring of the balloon 20 surface is improved. In an alternative embodiment, the hydrophilic layer 212 can also be arrayed on the surface of the extension layer 211.

[0035] Optionally, the hydrophilic layer 212 is selected from materials such as polyethyleneimine, which reduces the passage resistance of the balloon 20 and makes the balloon 20 smoother. Optionally, the thickness of the hydrophilic layer 212 is 0.02-0.04 mm.

[0036] Optionally, the spacing between the hydrophilic layers 212 is 0.7mm-1.2mm. By setting a certain spacing between the hydrophilic layers 212, the surface of the balloon 20 with the hydrophilic layer 212 can have higher smoothness after inflation, while the surface without the hydrophilic layer 212 has better anchoring, ensuring greater stability and reliability during use.

[0037] Furthermore, the extension layer 211 is composed of multiple intersecting connecting parts, and multiple extension holes are formed between the multiple connecting parts; wherein, the thickness of the extension layer 211 is 0.12mm-0.25mm. Preferably, the multiple connecting parts are interwoven and woven together.

[0038] In this embodiment, when the balloon 20 is inflated, the extension layer 211 is stretched under stress. Due to the presence of multiple extension holes, the multiple connecting parts are tightly adhered to each other, ensuring better extensibility and higher tensile strength of the extension layer 211. This results in higher expansion efficiency of the balloon 20 when anchored at the lesion site. Optionally, the extension layer 211 and the tube body 10 are made of polymer materials. For example, the extension layer 211 and the tube body 10 can be made of PET (polyethylene terephthalate) or PU (polyurethane) materials.

[0039] In this embodiment, the connecting component 30 includes a first connecting port 31 and a second connecting port 32. The first connecting port 31 is connected to the tube body 10 and is arranged coaxially. The second connecting port 32 is connected to the tube body 10, and the two form an included angle with a predetermined angle.

[0040] Furthermore, the first connection port 31 and the second connection port 32 can be used to inject different liquids, for example, the first connection port 31 can be used to insert interventional instruments such as guide wires, and the second connection port 32 can be used to inject saline solution. Thus, the saline solution enters the balloon 20 and pressurizes it, forcing the balloon 20 to inflate. Optionally, the predetermined angle is 30-45 degrees. The specific angle can be set according to actual needs, for example, it can be 35 degrees.

[0041] Furthermore, the second connection port 32 has an inlet end 321 and an outlet end 322, and the diameter of the second connection port 32 is configured to gradually decrease from the inlet end 321 to the outlet end 322; wherein, the inner diameter of the tube body 10 is the same as the minimum diameter of the outlet end 322.

[0042] In this embodiment, by setting the diameter of the second connection port 32 from the inlet end 321 to the outlet end 322 to gradually decrease, the pressure of the fluid in the second connection port 32 can gradually increase during the pressurization process of the balloon 20, and force the fluid flow rate to increase, thereby greatly improving the fluid flow rate and making the balloon 20 expand more efficiently and quickly; by setting the inner diameter of the tube body 10 and the minimum inner diameter of the outlet end 322 to be the same, the fluid flow rate is more stable during the pressurization process.

[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] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A balloon dilatation catheter characterized by, The application relates to a balloon catheter, comprising: a tube body; a balloon arranged at one end of the tube body and composed of a balloon wall of a multi-layer structure, the balloon wall being stretched when the balloon is inflated; a connecting assembly arranged at the other end of the tube body and in communication with the balloon to make liquid flow into the balloon to inflate the balloon; the connecting assembly comprises a first connecting port in communication with the tube body and coaxially arranged and a second connecting port in communication with the tube body and forming a predetermined angle with the first connecting port; the second connecting port has an inlet end and an outlet end, and the diameter of the inlet end to the outlet end is gradually reduced; the first connecting port is used for inserting an interventional instrument, and the second connecting port is used for injecting normal saline.

2. The balloon dilation catheter of claim 1, wherein, The balloon wall comprises a stretch layer and a hydrophilic layer, the hydrophilic layer is annularly coated on the stretch layer and is arranged along the length direction of the balloon wall.

3. The balloon dilation catheter of claim 2, wherein, The stretch layer is composed of a plurality of longitudinal and transverse intersecting connecting portions, and a plurality of stretch holes are formed among the connecting portions.

4. The balloon dilation catheter of claim 2, wherein, The thickness of the stretch layer is 0.12-0.25 mm, and the thickness of the hydrophilic layer is 0.02-0.04 mm.

5. The balloon dilation catheter of claim 2, wherein, The stretch layer and the tube body are made of a high polymer material.

6. The balloon dilation catheter of claim 2, wherein, The interval between the hydrophilic layers is 0.7-1.2 mm.

7. The balloon dilatation catheter of claim 6, wherein, The inner diameter of the tube body is the same as the minimum diameter of the outlet end.

8. The balloon dilation catheter of claim 1, wherein, The predetermined angle is 30-45 degrees.

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