Balloon catheter

Abstract

The balloon catheter comprises a catheter body (20) provided with a plurality of pipelines, a medicine feeding part arranged on the catheter body (20) and a balloon, the catheter body (20) comprises a drainage tube (17) penetrating through the catheter body (20) in the extending direction of the catheter body (20), the medicine feeding part comprises a through hole penetrating through the surface of the medicine feeding part and communicating with one of the pipelines, and the balloon is arranged in the through hole. The two ends of the catheter (20) are respectively an insertion end used for being inserted into a cavity and an operation end used for injecting medicine and controlling the balloon to expand or contract, the medicine feeding part and the balloon are both arranged at the insertion end, and the medicine feeding part and the balloon are respectively communicated with the operation end through different pipelines. According to the technical scheme, the balloon catheter integrates the drainage tube, the medicine feeding part and the balloon, and various operations such as drainage and medicine injection can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a balloon catheter. BACKGROUND

[0002] In the existing medical technology field, especially when performing interventional surgery or other types of surgery, balloon catheters are widely used in human body cavities to achieve drug infusion or liquid drainage.

[0003] However, the existing balloon catheters usually only have a single function, that is, they are either used for drug infusion or for liquid drainage. Therefore, they often cannot simultaneously meet multiple requirements in surgery, such as achieving cavity expansion or drainage while performing drug infusion. This results in the need for additional operations and time to switch or use other medical devices during surgery.

[0004] Therefore, how to provide a balloon catheter that can simultaneously meet multiple requirements such as drainage and liquid injection has become a technical problem to be solved by the present application. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the present application proposes a balloon catheter to solve the above technical problems.

[0006] According to the present application, a balloon catheter is proposed, which comprises a catheter having a plurality of conduits, a drug delivery part arranged on the catheter, and a balloon, wherein the catheter comprises a drainage tube passing through in the extension direction thereof, the drug delivery part comprises a through hole passing through the surface thereof and communicating with one of the conduits, and the two ends of the catheter are respectively an insertion end for insertion into a cavity and an operation end for drug injection and control of the expansion or contraction of the balloon, wherein the drug delivery part and the balloon are arranged on the insertion end, and the drug delivery part and the balloon are respectively communicated with the operation end through different conduits.

[0007] Preferably, the operation end comprises a drug injection hole and a first pressure filling interface, the balloon comprises a first balloon, the drug delivery part comprises a drug delivery balloon wrapped outside the first balloon, the drug delivery balloon is provided with a through hole passing through the surface thereof, the catheter is provided with a drug delivery hole between the first balloon and the drug delivery balloon, the drug delivery hole is communicated with the drug injection hole through a drug delivery conduit arranged in the catheter, and the first balloon is communicated with the first pressure filling interface through a first pressure filling conduit arranged in the catheter.

[0008] Preferably, the through hole is a micropore, and / or the micropore comprises a plurality of micropores.

[0009] Preferably, the insertion end comprises a plurality of balloons, and the plurality of balloons are arranged at different positions of the first balloon.

[0010] Preferably, the insertion end comprises a second balloon and a third balloon arranged on two sides of the first balloon respectively, wherein the second balloon is arranged at the end of the balloon catheter, and the operation end comprises a second inflation interface and a third inflation interface, the second balloon is communicated with the second inflation interface through a second inflation pipeline, and the third balloon is communicated with the third inflation interface through a third inflation pipeline.

[0011] Preferably, the injection hole, the first inflation interface, the second inflation interface and the third inflation interface are connected with the pipelines through lockable structures.

[0012] Preferably, the lockable structure is a luer joint.

[0013] Preferably, the catheter is a multi-cavity structure, and the pipelines are formed by the cavities.

[0014] Preferably, the drainage tube is arranged at the center of the catheter, and a plurality of the pipelines are arranged around the catheter.

[0015] Preferably, the catheter has a scale mark extending along the length of the catheter.

[0016] According to the technical solution of the present application, the balloon catheter integrates the drainage tube, the medicine delivery part and the balloon, and can meet various operations such as drainage and medicine injection.

[0017] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application and are incorporated herein in their entirety. The illustrations are illustrative of embodiments of the present application and are not meant to limit the present application, but to include equivalent thereof.

[0019] Figure 1 FIG. 1 is a schematic view of a drainage catheter according to an embodiment of the present application, wherein a balloon is in an inflated state;

[0020] Figure 2 FIG. 2 is a sectional view along H-H of the drainage catheter of FIG. 1; Figure 1

[0021] Figure 3 FIG. 4 is an enlarged view of the medicine delivery part in the drainage catheter shown in FIG. 1; Figure 1

[0022] Figure 4 FIG. 6 is a schematic view of the balloon in the drainage catheter shown in FIG. 1 in a deflated state. Figure 1 DETAILED DESCRIPTION

[0023] ​​​In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0024] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of particular examples in the following are described. Of course, they are only examples and are not intended to limit the present application. Furthermore, the present application can refer to a reference numeral and / or letter in different examples. Such repetition is for the sake of a simplified and clear purpose, and does not indicate a relationship between the various embodiments and / or settings discussed.

[0025] For the convenience of description, spatial relative terms can be used in the description to describe the relative position relationship or movement condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, then the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be subsequently oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the up and down positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0026] According to the present application, a balloon catheter is provided, comprising a catheter 20 having a plurality of channels, a drug delivery part and a balloon, wherein the catheter 20 comprises a drainage tube 17 extending through it in the extension direction, the drug delivery part comprises a through hole through its surface and communicating with one of the channels, and the two ends of the catheter 20 are respectively an insertion end for insertion into a cavity and an operation end for drug injection and control of the balloon expansion or contraction, wherein the drug delivery part and the balloon are both arranged at the insertion end, and the drug delivery part and the balloon are respectively communicated with the operation end through different channels.

[0027] In the technical solution of the present application, the plurality of pipes and the drainage tube 17 can be arranged in the catheter 20 in a suitable form. For example, the cavity of the catheter 20 can have a larger diameter, and the plurality of pipes and the drainage tube 17 can be arranged in the cavity of the catheter 20 in the form of a tubular structure with a smaller diameter, or the catheter 20 can be directly formed with a plurality of cavities in its interior by a forming process such as blow molding, and the plurality of cavities serve as the pipes and the drainage tube 17, etc., which are not limited herein. The drainage tube 17 penetrates through the catheter 20 and is used for drainage, irrigation or insertion of a support wire. By inflating or filling water at the operation end, the fluid enters the balloon through one of the pipes, so that the balloon is inflated to enable the insertion end of the balloon catheter to be positioned in the patient's cavity for drainage, irrigation, etc. through the drainage tube 17. The drug delivery part can be arranged at the rear or front of the balloon, or the drug delivery part can be wrapped outside the balloon and inflated together with the balloon under the action of pressure, etc. The drug delivery part includes a through hole which is in communication with the operation end through a pipe. By injecting medicine at the operation end, the medicine can flow into the drug delivery part through the pipe and flow out through the through hole, so that the medicine is applied to the affected area in the patient's cavity. It should be noted that the pipe for delivering medicine is not in communication with the pipe for inflating the balloon.

[0028] According to the present application, the balloon catheter integrates the drainage tube, the drug delivery part and the balloon, and can meet various operations such as drainage and medicine injection, thereby avoiding the cumbersome operation of frequently changing catheters with different functions in different processes.

[0029] In order to improve the accuracy of medicine delivery, according to a preferred embodiment, as shown in Figure 3 the operation end includes a medicine injection hole 14 and a first inflation interface 15, the balloon includes a first balloon 3, the drug delivery part includes a drug delivery balloon 2 wrapped outside the first balloon 3, the drug delivery balloon 2 is provided with a through hole penetrating through its surface, the catheter 20 is provided with a drug delivery hole 6 between the first balloon 3 and the drug delivery balloon 2, the drug delivery hole 6 is in communication with the medicine injection hole 14 through a drug delivery pipe 9 arranged in the catheter 20, and the first balloon 3 is in communication with the first inflation interface 15 through a first inflation pipe 11 arranged in the catheter 20.

[0030] In the technical solution of the present application, the medicine delivery capsule 2 can be wrapped outside the first balloon 3 to form a double-layer capsule structure, so that an independent chamber is formed between the inner wall of the medicine delivery capsule 2 and the outer wall of the first balloon 3, and the catheter 20 can be provided with a medicine delivery hole 6 between the medicine delivery capsule 2 and the first balloon 3, so that the medicine liquid can flow into the chamber formed between the medicine delivery capsule 2 and the first balloon 3 through the medicine delivery hole 6. The surface of the medicine delivery capsule 2 can be provided with a through hole, so that the chamber is in communication with the cavity of the patient, so as to deliver the medicine into the cavity of the patient. The medicine delivery capsule 2 and the first balloon 3 can be made of elastic materials such as silica gel, so that the medicine delivery capsule 2 can be inflated together under the inflation pressure of the first balloon 3.

[0031] Through the present application, when the balloon catheter is used for medicine injection, the medicine delivery part can be first inserted into the cavity of the patient, so that the medicine delivery capsule reaches the diseased part, and then the first balloon 3 is inflated, so that the first balloon 3 drives the medicine delivery capsule 2 wrapped outside to inflate together, so that the surface of the medicine delivery capsule 2 is in contact with the cavity of the diseased part, and the medicine liquid is injected through the injection hole 14, so that the medicine liquid flows into the diseased part through the injection pipeline 9, so that the effect of precise medicine delivery can be achieved, and the waste of medicine or the stimulation of other positions of the cavity can be avoided.

[0032] In order to further improve the precision of medicine delivery, according to a preferred embodiment, as shown in Figure 3 The through hole is a micro hole 19, and / or the micro hole 19 includes a plurality of.

[0033] Through the micro hole 19, the outflow amount of the medicine liquid can be accurately controlled, so that the medicine delivery precision is further improved.

[0034] In order to improve the flexibility of operation, according to a preferred embodiment, the insertion end includes a plurality of balloons, and the plurality of balloons are arranged at different positions of the first balloon 3.

[0035] In the technical solution of the present application, a plurality of balloons can be arranged, for example, two balloons are arranged on the same side or on the two sides of the first balloon 3, so that the effect of pressing the cavity through the plurality of balloons can be achieved, and the plurality of balloons can be operated through the operation end, so that the inflation of different balloons can be flexibly selected under different requirements.

[0036] In order to avoid the flow of medicine liquid into the cavity part of the non-diseased part, according to a preferred embodiment, as shown in Figure 1 The insertion end includes a second balloon 1 and a third balloon 4 arranged on the two sides of the first balloon 3 respectively, the second balloon 1 is arranged at the end of the balloon catheter, the operation end includes a second inflation interface 13 and a third inflation interface 16, the second balloon 1 is in communication with the second inflation interface 13 through a second inflation pipeline 12, and the third balloon 4 is in communication with the third inflation interface 16 through a third inflation pipeline 10.

[0037] In the technical solution of the present application, the balloon catheter is a three-balloon structure, wherein the first balloon 3 is arranged in the middle. When drug delivery is performed, the third balloon 3 can be extended into the affected area, and the second balloon 1 and the third balloon 4 can be inflated to press the cavity, so that the cavity between the second balloon 1 and the third balloon 4 forms a sealed cavity, and the second balloon 1 and the third balloon 4 seal the two ends of the cavity, so that the drug liquid flowing out of the drug delivery balloon 2 cannot flow to other positions of the cavity.

[0038] In order to avoid the undesirable leakage or backflow of the drug liquid in the drug delivery pipeline and the liquid or gas in the inflation pipeline, according to a preferred embodiment, the drug injection hole 14, the first inflation interface 15, the second inflation interface 13 and the third inflation interface 16 are all connected with the pipeline through a lockable structure.

[0039] In the technical solution of the present application, the lockable structure can adopt a suitable form such as a silica gel valve or a luer joint to close the pipeline after liquid injection or inflation is completed, so as to prevent the leakage or backflow of the drug liquid, gas or liquid. Preferably, the lockable structure is a luer joint.

[0040] In order to improve the integration of the catheter 20, according to a preferred embodiment, as shown in Figure 4 the catheter 20 is a multi-cavity structure, and the pipeline is formed by the cavities.

[0041] In the technical solution of the present application, the catheter 20 can be made by a molding process such as blow molding to directly generate multiple cavities in its interior, wherein each cavity is independently arranged and does not communicate with other cavities of the catheter 20. In order to control different balloons and liquid injection respectively, the catheter 20 can be provided with different through holes at different positions, and these through holes respectively communicate with one of the cavities, for example Figure 4 as shown, wherein the drug delivery hole 6 communicates with the drug delivery pipeline 9 to deliver drug liquid into the cavity between the first balloon 3 and the drug delivery balloon 2; the first opening hole 7 communicates with the first inflation pipeline 11 to inflate the first balloon 3; the second opening hole 5 communicates with the second inflation pipeline 12 to inflate the second balloon 1; and the third opening hole 8 communicates with the third inflation pipeline 10 to inflate the third balloon 4.

[0042] Through the present application, the integration of the pipeline is improved, and the connection difficulty of the pipeline and the catheter 20 is reduced.

[0043] According to a preferred embodiment, as shown in Figure 2 the drainage tube 17 is arranged at the center of the catheter 20, and multiple pipelines are arranged around the catheter 20.

[0044] In order to facilitate the operator to accurately control the insertion amount of the balloon catheter, according to a preferred embodiment, as shown in Figure 1As shown, the catheter 20 has scale markings extending along the length of the catheter 20.

[0045] In the technical solution of the present application, the scale markings can adopt a suitable form, for example, the scale markings can include centimeter, millimeter, etc. scales and cover the remaining length of the catheter 20 at least from the end of the insertion end, or can be marked in the form of multiple ring-shaped markings uniformly distributed along the catheter 20, which is not limited here, as long as the operator can judge the depth of the balloon catheter insertion through the markings. Figure 1 As shown, the catheter 20 has scale markings extending along the length of the catheter 20.

[0046] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0047] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply a sequence or order unless specifically stated to be an order dependent step. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0048] The above description is merely illustrative of the application and not restrictive. Various modifications can be made to the embodiments described without departing from the spirit or scope of the application. Accordingly, the application is not to be restricted, except as by the appended claims.

Claims

1. A balloon catheter, characterized by, The catheter (20) includes a drainage tube (17) extending through the catheter (20), a drug delivery part provided on the catheter (20), and a balloon; the drug delivery part includes a through hole extending through the surface thereof and communicating with one of the conduits, and the two ends of the catheter (20) are respectively an insertion end for insertion into a cavity and an operation end for drug injection and control of the expansion or contraction of the balloon; the drug delivery part and the balloon are both provided on the insertion end, and the drug delivery part and the balloon are respectively communicated with the operation end through different conduits. The operation end includes a drug injection hole (14) and a first inflation interface (15), the balloon includes a first balloon (3), the drug delivery part includes a drug delivery balloon (2) wrapped outside the first balloon (3), the drug delivery balloon (2) is provided with a through hole extending through the surface thereof, the catheter (20) is provided with a drug delivery hole (6) between the first balloon (3) and the drug delivery balloon (2), the drug delivery hole (6) is communicated with the drug injection hole (14) through a drug delivery conduit (9) provided in the catheter (20), and the first balloon (3) is communicated with the first inflation interface (15) through a first inflation conduit (11) provided in the catheter (20).

2. The balloon catheter of claim 1, wherein, The through hole is a micropore (19), and the micropore (19) is a plurality of micropores.

3. The balloon catheter of claim 1, wherein, The insertion end includes a plurality of balloons, and the plurality of balloons are arranged at different positions of the first balloon (3).

4. The balloon catheter of claim 3, wherein, The insertion end includes a second balloon (1) and a third balloon (4) arranged on both sides of the first balloon (3), respectively, wherein the second balloon (1) is arranged at the end of the balloon catheter, and the operation end includes a second inflation interface (13) and a third inflation interface (16), the second balloon (1) is communicated with the second inflation interface (13) through a second inflation conduit (12), and the third balloon (4) is communicated with the third inflation interface (16) through a third inflation conduit (10).

5. The balloon catheter of claim 4, wherein, The drug injection hole (14), the first inflation interface (15), the second inflation interface (13), and the third inflation interface (16) are all connected with the conduits through lockable structures.

6. The balloon catheter of claim 5, wherein, The lockable structure is a luer joint.

7. The balloon catheter of any of claims 1 to 6, wherein, The catheter (20) is a multi-cavity structure, and the conduits are formed by the cavities.

8. The balloon catheter of claim 7, wherein, The drainage tube (17) is arranged at the center of the catheter (20), and a plurality of conduits are arranged around the catheter (20).

9. The balloon catheter of claim 1, wherein, The catheter (20) has a scale mark extending along the length direction of the catheter (20).

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