A balloon catheter

Abstract

The present invention discloses a balloon catheter, comprising: a catheter body, comprising a first pipeline, a second pipeline, a tip and a multi-channel tail seat, one end of the first pipeline and one end of the second pipeline are respectively installed on the multi-channel tail seat, a certain gap is provided between the first pipeline and the second pipeline, and the tip is installed on the other end of the first pipeline; the multi-channel tail seat comprises an insertion pipeline and a first fluid pipeline, the insertion pipeline is connected with the first pipeline, and the first fluid pipeline is connected with the second pipeline; a balloon comprises a first capsule body and a second capsule body, one end of the second capsule body is installed on the second pipeline, and the other end is installed on the tip, the first capsule body surrounds to form a first space, the first capsule body and the second capsule body surround to form a second space between the first capsule body and the second capsule body, and liquid or gas is suitable for entering the second space through the first fluid pipeline and the second pipeline. It can shorten the time of fluid filling and / or discharge.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and further to a balloon catheter, in particular to a balloon catheter used for aortic valve dilation. Background Art

[0002] Aortic valve stenosis is divided into congenital stenosis and acquired stenosis. The pathology of aortic valve stenosis is rheumatic aortic valve stenosis. Due to adhesion and thickening of the valve junction, the valve orifice becomes smaller and the opening is restricted. Aortic valve stenosis leads to poor blood flow, which brings pain to patients and even life-threatening. Currently, one of the main treatments for aortic valve stenosis is to implant an artificial valve through a catheter at the stenosis to keep the aortic valve blood flow smooth.

[0003] Before implanting an artificial valve into the stenosis of the aortic valve, a balloon dilatation catheter is usually used to pre-dilate the stenotic aortic valve, so that the valve and delivery device used for transcatheter aortic valve implantation can easily cross the aortic valve, increase the area of ​​the aortic valve opening, and the valve will not block the valve orifice after crossing the valve, and the hemodynamics will be improved to a certain extent.

[0004] When using a traditional balloon dilatation catheter, the balloon dilatation catheter is placed into the aortic valve opening, and then the balloon is filled with liquid or gas to expand the balloon, squeeze the opening of the aortic valve, and increase the size of the aortic valve opening; after the expansion is completed, the gas or liquid in the balloon is extracted to reduce the volume of the balloon, and then the balloon dilatation catheter is withdrawn from the aortic valve along the blood vessels.

[0005] It should be pointed out that when a traditional balloon dilatation catheter is decompressed, it relies on the elasticity of the balloon itself to recover, and there is no other recovery force, so it takes a long time for the balloon to retract to its original shape. Especially after the balloon catheter has been used multiple times, the elasticity of the balloon becomes worse, and it takes more time to retract. It is understandable that the longer the balloon decompression and retraction time, the longer the balloon catheter stays in the aortic valve opening, which increases the risk of myocardial ischemia complications and causes unnecessary harm to the patient.

[0006] In summary, there is a need to improve the traditional balloon catheter. Summary of the invention

[0007] In order to solve the above problems, an object of the present invention is to provide a balloon catheter, the balloon of which can be rapidly expanded and deflated, thereby reducing the time the balloon catheter is located in the aortic valve and reducing the risk of complications.

[0008] In order to achieve the above object, the present invention provides a balloon catheter, comprising:

[0009] A catheter body, comprising a first pipe, a second pipe, a tip and a multi-channel tailstock, wherein one end of the first pipe and one end of the second pipe are respectively mounted on the multi-channel tailstock, the second channel is located outside the first channel, and there is a certain gap between the first pipe and the second pipe, and the tip is mounted on the other end of the first pipe; the multi-channel tailstock comprises an insert pipe and a first fluid pipe, the insert pipe is communicated with the first pipe, and the first fluid pipe is communicated with the second pipe;

[0010] The balloon includes a first balloon body and a second balloon body, one end of the second balloon body is installed on the second pipe, and the other end is installed on the tip, the first balloon body is located in the space surrounded by the second balloon body, the first balloon body surrounds to form a first space, and a second space is formed between the first balloon body and the second balloon body, and liquid or gas is suitable for entering the second space through the first fluid pipe and the second pipe.

[0011] In some preferred embodiments of the present invention, the first space surrounded by the first capsule contains a certain amount of gas or liquid.

[0012] In some preferred embodiments of the present invention, one end of the first capsule is mounted on the first pipe, and the other end is mounted on the tip, and at least a portion of the first pipe is located in the first space.

[0013] In some preferred embodiments of the present invention, two ends of the first capsule are respectively installed on the first pipe, and at least a portion of the first pipe is located in the first space.

[0014] In some preferred embodiments of the present invention, the first bladder is folded along the direction in which the length of the first tube extends.

[0015] In some preferred embodiments of the present invention, the catheter body further includes a third pipe, the third pipe is located between the first pipe and the second pipe, and there is a first gap between the third pipe and the first pipe, and there is a second gap between the third pipe and the second pipe, one end of the third pipe is installed on the multi-way tailstock, and the first end of the first capsule is installed on the other end of the third pipe; the multi-way tailstock further includes a second fluid pipe, the second fluid pipe is connected to the third pipe, and the liquid or gas is suitable for entering the first capsule through the second fluid pipe and the first gap; the liquid or gas is suitable for entering the second capsule through the first fluid pipe and the second gap.

[0016] In some preferred embodiments of the present invention, the length of the third pipeline is greater than the length of the second pipeline and less than the length of the first pipeline.

[0017] In some preferred embodiments of the present invention, the second capsule is made of a polymer elastic material.

[0018] In some preferred embodiments of the present invention, the catheter body further includes a positioning member, which is installed on the first pipe and is located in a space surrounded by the second balloon body to determine the position of the balloon catheter.

[0019] In some preferred embodiments of the present invention, the positioning member is a developing ring, and the developing ring is sleeved on the peripheral wall of the first pipe.

[0020] The solution of the present invention includes at least one of the following beneficial effects:

[0021] 1. The present invention adopts a double-layer balloon structure, and fills the space between the two balloon layers with liquid or gas, thereby shortening the time for liquid or gas filling and liquid or gas discharge, thereby reducing the time the balloon catheter stays in the patient's body and reducing the risk of complications in the patient;

[0022] 2. A double-layer balloon structure is adopted, and liquid or gas is filled in the two balloon spaces respectively, so as to shorten the filling time of liquid or gas and the discharge time of liquid or gas, thereby reducing the time that the balloon catheter stays in the patient's body and reducing the risk of complications in the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the scheme, technical features, advantages and implementation methods of the present invention.

[0024] Figure 1 is a partial cross-sectional view of a balloon catheter in a contracted state according to a first preferred embodiment of the present invention;

[0025] Figure 2 is a partial cross-sectional view of the balloon catheter in the expanded state of the above preferred embodiment of the present invention;

[0026] Figure 3 is a partial cross-sectional view of a balloon catheter according to a second preferred embodiment of the present invention;

[0027] Figure 4 is a partial cross-sectional view of a balloon catheter according to a third preferred embodiment of the present invention;

[0028] Figure 5 is a partial cross-sectional view of a balloon catheter in a contracted state according to a fourth preferred embodiment of the present invention;

[0029] Figure 6It is a partial cross-sectional view of a balloon catheter in an expanded state according to a fourth preferred embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] 1 catheter body, 2 first balloon body, 3 second balloon body; 11 first pipeline, 12 second pipeline, 13 multi-way tail seat, 14 tip, 15 positioning piece, 20 first space, 30 second space, 16 third pipeline, 131 insertion pipeline, 132 first fluid pipeline, 133 second fluid pipeline. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0033] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.

[0034] Embodiment 1

[0035] Reference Manual Attached Figure 1 to Figure 2 The present invention provides a balloon catheter, the balloon of which can be rapidly expanded and deflated, thereby reducing the time the balloon catheter is located in the aortic valve and reducing the risk of complications.

[0036] Specifically, the balloon catheter includes a catheter body 1, a first balloon 2 and a second balloon 3, the first balloon 2 and the second balloon 3 are respectively installed on the catheter body 1, and the second balloon 3 is located on the outside of the first balloon 2; the first balloon 2 is surrounded to form a first space 20; the first balloon 2 and the second balloon 3 are surrounded to form a second space 30 between the first balloon 2 and the second balloon 3; the second space 30 is suitable for being filled with liquid or gas so that the second balloon 3 expands outward to support the aortic valve.

[0037] It can be understood that since the second space 30 surrounds the outside of the first space 20 and the second space 30 is filled with liquid or gas, the volume of liquid or gas filled can be reduced when the second capsule 3 expands to the same volume, thereby shortening the time for the second capsule 3 to expand outward from a contracted state to an expanded state; accordingly, when the gas or liquid in the second space 30 is discharged, since there is less liquid or gas in the second space 30, the time for the second capsule 3 to shrink from the expanded state to the contracted state can be shortened.

[0038] Therefore, by adopting a double-layer balloon design and filling liquid or gas between the two balloon layers, the time for the second balloon to expand and retract can be shortened, thereby reducing the time the balloon catheter is located in the aortic valve, thereby reducing the risk of unnecessary complications in patients.

[0039] Further, the second capsule 3 is made of elastic polymer material, and the elastic polymer material includes but is not limited to polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, epoxy resin, phenolic plastic, polyimide, melamine formaldehyde resin, etc. It can be understood that since the second capsule 3 is an elastic polymer tube, when pressure relief is required, that is, when the liquid or gas in the second space 30 needs to be discharged, the second capsule 3 can be quickly retracted under the action of the elastic restoring force of the second capsule 3 itself, thereby reducing the time for the second capsule 3 to retract from the expanded state to the contracted state, thereby further reducing the time for the balloon catheter to be located at the opening of the aortic valve and reducing the risk of unnecessary complications in patients.

[0040] The catheter body 1 of the balloon catheter further includes a first pipe 11, a second pipe 12, a multi-way tailstock 13 and a tip 14; the first pipe 11 is located in the channel of the second pipe 12, the diameter of the first pipe 11 is smaller than the diameter of the second pipe 12, and there is a certain gap between the first pipe 11 and the second pipe 12; the first end of the first pipe 11 and the first end of the second pipe 12 are respectively installed on the multi-way tailstock 13; the multi-way tailstock 13 has an insertion pipe 131 and a first fluid pipe 132, the insertion pipe 131 is connected to the first pipe 11, and the first fluid pipe 132 is connected to the second pipe 12.

[0041] When the balloon catheter reaches the narrow aortic valve, the filling fluid such as liquid or gas is suitable for entering the second space 30 between the first balloon 2 and the second balloon 3 through the gap between the first fluid pipe 132, the second pipe 12 and the first pipe 11, so that the second balloon 3 expands outward to open the narrow aortic valve.

[0042] The length extension direction of the insertion pipe 131 of the multi-way tailstock 13 is the same as the length extension direction of the first pipe 11 ; the first fluid pipe 132 is located on one side of the insertion pipe 131 and has a certain inclined angle with the insertion pipe 131 .

[0043] Reference Manual Attached Figure 1 and Figure 2 , the length of the first pipe 11 is greater than the length of the second pipe 12. The first end of the first balloon 2 is installed on the first pipe 11, and the second end of the first balloon 2 is installed on the tip 14. The first end of the second balloon 3 is installed on the second pipe 12, and the second end of the second balloon 3 is installed on the tip 14; that is, in this preferred embodiment, the second end of the first balloon 2 and the second end of the second balloon 3 are installed on the tip 14 respectively. It can be understood that the second end of the first balloon 2 and the second end of the first balloon 3 can be installed on the tip 14 at the same time, so as to improve the processing efficiency of the balloon catheter.

[0044] Preferably, the second end of the first capsule 2 is mounted on the tip 14 by welding, and the first end of the first capsule 2 is mounted on the outer wall of the first pipe 11 by welding; the first end of the second capsule 3 is mounted on the second pipe 12 by welding, and the second end of the second capsule 3 is mounted on the tip 14 by welding. It can be understood that the two ends of the first capsule 2 and the two ends of the second capsule 3 can also be mounted on the catheter body 1 by other means, such as gluing, and the specific way in which the two ends of the first capsule 2 and the two ends of the second capsule 3 are mounted on the catheter body 1 should not constitute a limitation to the present invention.

[0045] Reference Manual Attached Figure 1 , which shows that the balloon catheter is in a contracted state; refer to the attached manual Figure 2, which shows that the balloon catheter is in an expanded state. When the balloon catheter is in the contracted state, the balloon catheter is transported to the narrow aortic valve through the blood vessels. After the balloon catheter is transported to the narrow aortic valve opening, the second space 30 between the first balloon 2 and the second balloon 3 is filled with fluid such as liquid or gas through the first fluid pipeline 132, the gap between the first pipeline 11 and the second pipeline 12, so that the second balloon 3 expands outward to expand the aortic valve. After the aortic valve is expanded, the liquid or gas in the second space 30 is discharged through the gap between the first pipeline 11 and the second pipeline 12 and the first fluid pipeline 132, so that the balloon catheter retracts from the expanded state to the contracted state. After the balloon catheter retracts from the expanded state to the contracted state, the volume of the balloon catheter is reduced, and the balloon catheter is withdrawn from the aortic valve through the blood vessels.

[0046] The catheter body 1 further includes two positioning members 15. The positioning members 15 are installed on the outer side wall of the first pipe 11, and the positioning members 15 are located in the first space 20 formed by the first balloon body 2. The positioning members 15 are used to determine the position of the balloon catheter after the balloon catheter is inserted into the patient's body. Preferably, the positioning members 15 are implemented as two developing rings, which are sleeved on the outer side wall of the first pipe 11, or formed inside the first pipe 11, so that the balloon catheter can be detected no matter at what angle it exists in the patient's body, thereby improving the accuracy of determining the position of the balloon catheter.

[0047] Reference Manual Attached Figure 1 When the balloon catheter is in a contracted state, the first balloon 2 is folded along the length direction of the first tube 11, thereby increasing the volume of the space occupied by the first balloon 2 and further reducing the volume of the second space 30, thereby further reducing the volume of the liquid or gas or other fluid filled in the second space 30 and reducing the time taken for the filling and discharge of the gas or liquid or other fluid.

[0048] Embodiment 2

[0049] Reference Manual Attached Figure 3, the diameter of the first pipe 11 is smaller than the diameter of the tip 14. In the second preferred embodiment of the present invention, the diameter of the first end of the first capsule 2 is smaller than the diameter of the second end of the first capsule 2, and the first space 20 formed by the first capsule 2 is a conical space. The conical first space 20 is filled with a preset volume of gas, so that when the second space 30 is filled with a fluid such as gas or liquid, the first capsule 2 will not be completely compressed by the liquid or gas to cause the first space 20 to disappear, so as to reduce the volume of the gas or liquid filled in the second space 30 when the second capsule 3 expands the same volume. Preferably, the first space 20 formed by the first capsule 2 is filled with a preset volume of filler, and the filler is preferably gas. Optionally, the first capsule 2 is made of hard material, such as plastic, hard polymer material, etc., to further reduce the size of the first capsule 2 compressed and deformed by the gas or liquid filled in the second space 30, and reduce the liquid or gas filled in the second space 30.

[0050] Embodiment 3

[0051] Reference Manual Attached Figure 4 , which shows a third preferred embodiment of the balloon catheter. In the third preferred embodiment, both ends of the second balloon 3 are mounted on the outer side wall of the first pipe 11; the second end of the second balloon 3 is mounted on the second pipe 12, and the first end of the second balloon 3 is mounted on the tip 14. In the first variant embodiment, the first balloon 2 and the second balloon 3 are separated, so that after the second space 30 between the first balloon 2 and the second balloon 3 is filled with gas or fluid such as gas, the second balloon 3 can expand outward more evenly, thereby improving the effect of expanding the aortic valve. Preferably, the first balloon 2 is located in the middle of the portion of the first pipe 11 that exceeds the second pipe 12.

[0052] Embodiment 4

[0053] Reference Manual Attached Figure 5 and Figure 6, which shows a fourth preferred embodiment of the balloon catheter. In this preferred embodiment, the balloon catheter is basically the same as the above preferred embodiments, except that, in the third preferred embodiment, the catheter body 1 further includes a third pipe 16, the multi-way tailstock 13 further includes a second fluid pipe 133, the third pipe 16 is installed on the multi-way tailstock 13, and the third pipe 16 is located between the first pipe 11 and the second pipe 12, a first gap is formed between the third pipe 16 and the first pipe 11, and a second gap is formed between the third pipe 16 and the second pipe 12; the first end of the first balloon 2 is installed on the third pipe 16, and the second end of the first balloon 2 is installed on the tip 14.

[0054] It should be pointed out that in the fourth preferred embodiment, the first space 20 formed by the first balloon 2 and the second space 30 between the first balloon 2 and the second balloon 3 can be filled with fluids such as liquid or gas, so as to reduce the expansion and contraction time of the third balloon 3, thereby reducing the obstruction time of the aortic valve orifice and reducing the occurrence of surgical complications.

[0055] Specifically, fluids such as liquids or gases are suitable for entering the second space 30 through the second gap between the first fluid pipeline 132, the second pipeline 12 and the third pipeline 16; fluids such as liquids or gases are suitable for entering the first space 20 through the gap between the second fluid pipeline 133, the first pipeline 11 and the third pipeline 16.

[0056] When the balloon catheter is converted from the contracted state to the expanded state, gas or liquid or other fluid is simultaneously filled into the first fluid conduit 132 and the second fluid conduit 133, so that the first balloon 2 and the second balloon 3 expand outward at the same time, and the two fluid channels are filled with liquid or gas, thereby shortening the time required for liquid or gas filling, thereby reducing the time for the balloon catheter to be converted from the contracted state to the expanded state.

[0057] Accordingly, when the balloon catheter is switched from the expanded state to the contracted state, the liquid or gas in the second space 30 is discharged from the first fluid conduit 132, and at the same time, the liquid or gas in the first space 20 is discharged from the second fluid conduit 133. In other words, the liquid or gas is discharged from two channels, thereby shortening the time for the liquid or gas to be discharged, and reducing the time for the balloon catheter to be switched from the expanded state to the contracted state.

[0058] Preferably, the types of fluids filled in the first balloon 2 and the second balloon 3 are the same, for example, gas is filled in the first balloon 2 and the second balloon 3 at the same time, or liquid is filled in the first balloon 2 and the second balloon 3 at the same time. Optionally, the types of fluids filled in the first balloon 2 and the second balloon 3 are different, for example, the first balloon 2 is filled with liquid while the second balloon 3 is filled with gas; or the first balloon 2 is filled with gas while the second balloon 3 is filled with liquid. It is understandable that when the first balloon 2 is filled with gas and the second balloon 3 is filled with liquid, when the balloon catheter is converted from the expanded state to the contracted state, the liquid in the second balloon 3 can apply an extrusion force to the first balloon 2, so that the gas in the first balloon 2 can be quickly discharged, thereby increasing the time for the balloon catheter to be converted from the expanded state to the contracted state.

[0059] Reference Manual Attached Figure 5 and Figure 6 Preferably, the length of the third pipe 16 is greater than the length of the second pipe 12 and less than the length of the first pipe 11, and the end of the third pipe 16 away from the multi-way tailstock 13 extends to the outside of the second pipe 12, so that the first end of the second capsule 3 is installed on the end of the third pipe 16 away from the multi-way tailstock 13. Optionally, the length of the third pipe 16 can also be consistent with the length of the second pipe 12, and the length of the third pipe 16 should not constitute a limitation to the present invention.

[0060] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A balloon catheter, characterized in that: include: A catheter body, comprising a first pipe, a second pipe, a tip and a multi-way tailstock, wherein one end of the first pipe and one end of the second pipe are respectively mounted on the multi-way tailstock, the second pipe is located outside the first pipe, and there is a certain gap between the first pipe and the second pipe, and the tip is mounted on the other end of the first pipe; the multi-way tailstock comprises an insertion pipe and a first fluid pipe, the insertion pipe is communicated with the first pipe, and the first fluid pipe is communicated with the second pipe; A balloon comprises a first balloon body and a second balloon body, wherein one end of the second balloon body is mounted on the second pipe, and the other end is mounted on the tip, the first balloon body is located in a space surrounded by the second balloon body, the first balloon body surrounds and forms a first space, the first space is filled with a filler of a preset volume, a second space is formed between the first balloon body and the second balloon body, and liquid or gas is suitable for entering the second space through the first fluid pipe and the second pipe to cause the second balloon body to expand outward.

2. The balloon catheter according to claim 1, characterized in that: The first space surrounded by the first capsule contains a certain amount of gas or liquid.

3. The balloon catheter according to claim 2, characterized in that: One end of the first capsule is installed on the first pipe, and the other end is installed on the tip, and at least a part of the first pipe is located in the first space.

4. The balloon catheter according to claim 2, characterized in that: Two ends of the first capsule are respectively installed on the first pipe, and at least a part of the first pipe is located in the first space.

5. The balloon catheter according to claim 3 or 4, characterized in that: The first sac is folded along the direction in which the length of the first tube extends.

6. The balloon catheter according to claim 1, characterized in that: The diameter of the first pipe is smaller than the diameter of the tip, and the diameter of the first end of the first capsule is smaller than the diameter of the second end of the first capsule, so that the first space surrounded by the first capsule is a conical space.

7. The balloon catheter according to claim 1, characterized in that: The length of the first pipeline is greater than the length of the second pipeline.

8. The balloon catheter according to any one of claims 1, 2, 3, 4, 6, or 7, characterized in that: The second capsule is made of polymer elastic material.

9. The balloon catheter according to claim 8, characterized in that: The catheter body further includes a positioning member, which is installed on the first pipe and is located in a space surrounded by the second balloon body, and is used to determine the position of the balloon catheter.

10. The balloon catheter according to claim 9, characterized in that: The positioning member is a developing ring, and the developing ring is sleeved on the peripheral wall of the first pipe.

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