CN111617371A - a balloon catheter - Google Patents

Abstract

The invention discloses a balloon catheter which comprises a three-way tailstock, a balloon, an outer tube and an inner tube, wherein the balloon comprises at least one high-elasticity balloon body and at least one low-elasticity balloon body, the high-elasticity balloon body is arranged on the low-elasticity balloon body, the balloon is provided with a cavity, the outer tube is provided with an outer channel, two ends of the outer tube are respectively connected to the three-way tailstock and the balloon, the outer channel of the outer tube is communicated with the cavity of the balloon, two ends of the inner tube are respectively connected to the three-way tailstock and the balloon, and the inner tube is held in the cavity of the balloon and the outer channel of the outer tube. The balloon catheter is quick in pressure relief, and is beneficial to reducing operation risks.

Description

a balloon catheter

technical field

The invention relates to the field of medical instruments, in particular to a balloon catheter.

Background technique

Balloon catheters are common medical devices in the medical field, and are usually used to dilate the diseased part of a patient to facilitate the treatment of the diseased part. Traditional balloon catheters usually include a balloon, an outer tube, an inner tube, and a tailstock. When in use, the balloon is placed at the place to be expanded, and then liquid or gas is filled into the balloon through the tailstock and the outer tube, so that the balloon is inflated to expand the place to be expanded. After the expansion is completed, the liquid or gas in the balloon is released through the tailstock and the outer tube, the balloon is retracted, and the volume of the balloon is reduced.

It should be pointed out that when taking out the balloon catheter, it is necessary to wait until the balloon of the balloon catheter is retracted and the volume is reduced before the balloon can be taken out. When the balloon of the traditional balloon catheter is retracted, the Due to its own elastic restoring force, the retraction process is slow, and the balloon catheter needs to be placed in the patient for a long time, which increases the risk of other complications for the patient. In addition, the outer diameter of the effective segment of the balloon after the balloon expansion of the existing balloon catheter is the same, and the balloon is easily slipped due to the flushing of blood flow during the expansion process.

In conclusion, there is a need to improve the traditional balloon catheter.

SUMMARY OF THE INVENTION

Aiming at the technical problems of long pressure relief time and easy slippage of the existing balloon catheter, the purpose of the present invention is to provide a balloon catheter which can quickly relieve pressure and can prevent slippage during use.

In order to achieve the above purpose, the present invention provides a balloon catheter, comprising:

Three-way tailstock;

a balloon, wherein the balloon includes at least one hyperelastic bladder and at least one hypoelastic bladder, wherein the balloon has a chamber;

an outer tube, wherein the outer tube has an outer channel, two ends of the outer tube are respectively connected to the three-way tailstock and the balloon, and the outer channel of the outer tube is communicated with the the chamber of a balloon;

An inner tube, wherein both ends of the inner tube are connected to the three-way tailstock and the balloon, respectively, and the inner tube is held between the chamber of the balloon and the outer tube inside the outer channel.

In some preferred embodiments of the present invention, the high-elasticity bladder and the low-elasticity bladder are connected in sections, and the high-elasticity bladder and the low-elasticity bladder surround to form the chamber.

In some preferred embodiments of the present invention, the adjacent high elastic bladders are evenly spaced.

In some preferred embodiments of the present invention, the adjacent high elastic bladders are arranged at uneven intervals.

In some preferred embodiments of the present invention, the adjacent sides of the high-elasticity bladder and the low-elasticity bladder are laminated and connected to each other.

In some preferred embodiments of the present invention, the adjacent sides of the high-elasticity bladder and the low-elasticity bladder are aligned and connected to each other by splicing.

In some preferred embodiments of the present invention, the low-elasticity bladder surrounds the cavity to form the chamber, and the high-elasticity bladder is disposed inside or outside the low-elasticity bladder.

In some preferred embodiments of the present invention, the segments of the high-elasticity bladder are arranged on the inner side or the outer side of the low-elasticity bladder.

In some preferred embodiments of the present invention, the high-elasticity capsule is a polymer elastic tube.

In some preferred embodiments of the present invention, the balloon catheter further comprises a tip and a developing ring, wherein the tip is provided at the end of the balloon, and the developing ring is provided on the inner tube.

Compared with the prior art, the balloon catheter provided by the present invention has at least one of the following beneficial effects:

1. The present invention improves the balloon of the balloon catheter. The balloon is composed of a low-elasticity balloon and a high-elasticity balloon. When the liquid in the chamber of the balloon withdraws, the low-elasticity balloon The body and the high-elasticity bladder release elastic potential energy, and the high-elasticity bladder has strong elasticity, which drives the low-elasticity bladder to quickly rebound and release pressure quickly.

2. In some embodiments of the present invention, the high-elasticity balloon body of the balloon is spliced with the low-elasticity balloon body, and the balloon is a segmented balloon. When the chamber is opened, the low-elasticity balloon body and the high-elasticity balloon body deform and expand outward. Since the elasticity of the high-elasticity balloon is greater than the elasticity of the low-elasticity balloon, the deformation degree of the high-elasticity balloon is greater than that of the low-elasticity balloon, and the surface of the balloon is uneven, causing The balloon does not easily slip during the process of being expanded.

Description of drawings

The preferred embodiments will be described below in a clear and easy-to-understand manner with reference to the accompanying drawings, and the solutions, technical features, advantages and implementations of the present invention will be further described.

1 is a cross-sectional view of a balloon catheter of a first preferred embodiment of the present invention;

2 is a sectional view of the balloon catheter of the above-mentioned preferred embodiment of the present invention in an expanded state;

3 is a cross-sectional view of a balloon catheter expansion for aortic valve expansion according to a second preferred embodiment of the present invention;

4 is a cross-sectional view of the balloon catheter for aortic valve expansion according to the above-described preferred embodiment of the present invention in an expanded state.

Description of reference numbers:

Balloon Catheter 100, Tip 10, Balloon 20, Inner Tube 30, Outer Tube 40, Tee Tailstock 50, Development Ring 60, Chamber 201, Inner Channel 301, Outer Channel 401, Low Elasticity Balloon 21, High Elasticity Capsule 22.

Detailed ways

In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

In order to keep the drawings concise, the drawings only schematically show the parts related to the present invention, and they do not represent its actual structure as a product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. As used herein, "one" not only means "only one", but also "more than one".

1 to 2 of the specification, a balloon catheter 100 according to a first preferred embodiment of the present invention will be described in the following description, and the balloon catheter 100 is particularly used for aortic valve expansion. The balloon catheter, wherein the balloon catheter 100 has a fast pressure release speed and a short pressure release time, which is beneficial to reduce the risk of aortic valve surgery. Slips easily.

The balloon catheter 100 includes a tip 10, a balloon 20, an inner tube 30, an outer tube 40, a three-way tailstock 50 and a developing ring 60, wherein the balloon 20 has a chamber 201, and the inner tube 30 has an inner tube. Channel 301, the outer tube 40 has an outer channel 401. The tip 10 and the outer tube 40 are respectively disposed at two ends of the balloon 20 , and the outer channel 401 of the outer tube 40 is communicated with the chamber 201 of the balloon 20 . The other end of the outer pipe 40 is fixed to the three-way tailstock 50 . Both ends of the inner tube 30 are respectively fixed to the end of the balloon 20 and the three-way tailstock 50 , and the inner tube 30 is held in the chambers 201 and 20 of the balloon 20 . inside the outer channel 401 of the outer tube 40 . The developing ring 60 is pressed against the inner tube 30 to facilitate the doctor's observation during the operation.

Preferably, the tip 10 and the outer tube 40 are fixed to the balloon 20 by welding. The tip 10 is useful for penetrating blood vessels and across valves during surgery, and the outer tube 40 is used to guide the flow of fluid.

Preferably, the inner tube 30 and the outer tube 40 are fixed to the three-way tailstock 50 by dispensing glue.

Those skilled in the art should understand that the fixing manner of the tip 10 , the outer tube 40 and the balloon 20 and the specific details of the inner tube 30 , the outer tube 40 and the three-way tailstock 50 The fixation method is only an example, and should not limit the content and scope of the balloon catheter 100 of the present invention.

The balloon 20 includes at least one low-elasticity balloon 21 and at least one high-elasticity balloon 22 , wherein the high-elasticity balloon 22 is disposed on the low-elasticity balloon 21 . During the operation, liquid is filled into the chamber 201 of the balloon 20 through the side hole of the three-way tailstock 50, and the low-elasticity balloon 21 and the high-elasticity balloon 22 are deformed and expanded. , dilation of the aortic valve stenosis. When the liquid in the chamber 201 of the balloon 20 withdraws, the low-elasticity balloon 21 and the high-elasticity balloon 22 release elastic potential energy, and the high-elasticity balloon 22 quickly rebounds, accelerating the The speed of pressure relief is reduced, the time for pressure relief is saved, and the risk of surgery is reduced.

1 and 2 of the specification, in a specific example of the present invention, the high-elasticity bladder 22 is connected to the low-elasticity bladder 21 in sections, and the high-elasticity bladder 22 and the low-elasticity bladder 22 are The cavity 201 is formed by the balloon bodies 21 together, and the balloon 20 is a segmented balloon. Specifically, the high-elasticity bladder 22 and the low-elasticity bladder are connected end-to-end, and the cavity 201 is formed around the high-elasticity bladder 22 and the low-elasticity bladder 21 together. When liquid fills the chamber 201 of the balloon 20 , the low-elasticity balloon 21 and the high-elasticity balloon 22 deform and expand outward. Since the elasticity of the high-elasticity bladder 22 is greater than the elasticity of the low-elasticity bladder 21 , the deformation degree of the high-elasticity bladder 22 is greater than that of the low-elasticity bladder 21 , and thus the The surface is uneven, so that the balloon 20 is not easy to slip during the process of being stretched. When the liquid in the chamber 201 of the balloon 20 withdraws, the low-elasticity balloon 21 and the high-elasticity balloon 22 release elastic potential energy, and the high-elasticity balloon 22 has strong elasticity, The low-elastic bladder 21 is driven to rebound quickly, the pressure relief speed is fast, and the pressure relief time is short.

Preferably, the high-elasticity bladder 22 and the low-elasticity bladder 21 are connected to each other by welding. Optionally, the high-elasticity bladder 22 and the low-elasticity bladder 21 are connected to each other by means of bonding. The specific connection manner of the high-elasticity bladder 21 and the low-elasticity bladder 21 is not limited.

Moreover, the specific numbers and specific distribution manners of the low-elasticity bladders 21 and the high-elasticity bladders 22 are not limited. The low-elasticity bladder 21 and the high-elasticity bladder 22 may be implemented in one, two, or more than two quantities. Preferably, two adjacent high-elasticity bladders 22 are disposed at both ends of the low-elasticity bladders 21 at intervals. Optionally, the adjacent high-elasticity bladders 22 are evenly arranged on the low-elasticity bladders 21 , that is, the width of each low-elasticity bladder 21 is the same. Optionally, the adjacent high-elasticity bladders 22 are disposed on the low-elasticity bladders 21 at uneven intervals, that is, the distances between the adjacent high-elasticity bladders 22 are inconsistent, and each of the The width of the low elasticity bladder 21 is not uniform. Preferably, two adjacent low-elasticity bladders 21 are disposed at both ends of the high-elasticity bladders 22 at intervals. Optionally, the adjacent low-elasticity bladders 21 are evenly arranged on the high-elasticity bladders 22 , that is, the widths of each of the high-elasticity bladders 22 are the same. Optionally, the distances between the adjacent low-elasticity bladders 21 are inconsistent, that is, the widths of each of the high-elasticity bladders 22 are inconsistent. It should be understood by those skilled in the art that the specific connection mode, specific number and specific distribution mode of the low-elasticity balloon 21 and the high-elasticity balloon 22 are only examples, and cannot be used as the main method for expansion described in the present invention. Limitations of content and scope of balloon catheter 100 for arterial valves.

Preferably, in this preferred embodiment, the adjacent sides of the high-elasticity bladder 22 and the low-elasticity bladder 21 are connected to each other in layers. When connecting the high-elasticity bladder 22 and the low-elasticity bladder 21 , the side edges of the high-elasticity bladder 22 and the low-elasticity bladder 21 are laminated first, and then welded by welding. The side edges of the high-elasticity capsule body 22 and the side edges of the low-elasticity capsule body 21 are laminated and connected by means of , glue bonding, etc. It can be understood that the specific manner of connecting the high-elasticity bladder 22 and the low-elasticity bladder 21 should not limit the present invention.

Optionally, the sides of the high-elasticity bladder 22 and the low-elasticity bladder 21 are aligned and connected by splicing. When connecting the high-elasticity bladder 22 and the low-elasticity bladder 21, first splicing and aligning the side edges of the high-elasticity bladder 22 and the low-elasticity bladder 21, and then welding, The side edges of the high-elasticity capsule body 22 and the side edges of the low-elasticity capsule body 21 are spliced and connected by means of glue bonding or the like. It can be understood that, the manner of splicing and connecting the side edges of the high-elasticity bladder 22 and the low-elasticity bladder 21 should not constitute a limitation to the present invention.

It is worth noting that the elasticity of the low-elasticity bladder 21 and the high-elasticity bladder 22 of the present invention are relative, and do not refer to specific types of elastic materials. At the same time, it can be understood that the The low elasticity bladder 21 may also have no elasticity. Preferably, the high elastic bladder 22 is implemented as a polymer elastic tube.

Referring to FIG. 3 and FIG. 4 of the specification, in the second preferred embodiment of the present invention, the low-elasticity bladder 21 surrounds the cavity 201 , and the high-elasticity bladder 22 is disposed on the low-elasticity bladder. 21 inside or outside. The high-elasticity balloon 22 is attached to the surface of the low-elasticity balloon 21, and when the liquid in the chamber 201 of the balloon 20 is withdrawn, the low-elasticity balloon 21 and the high-elasticity balloon The elastic bladder 22 releases elastic potential energy, and the high elastic bladder 22 has strong elasticity, which drives the low elastic bladder 21 to rebound rapidly, which improves the pressure relief speed, saves pressure relief time, and is beneficial to reduce the risk of surgery.

Preferably, the high-elasticity bladder 22 is attached to the inner surface of the low-elasticity bladder 21 . Optionally, the high-elasticity bladder 22 is attached to the outer surface of the low-elasticity bladder 21 .

Preferably, the high-elasticity bladder 22 is arranged on the inner side or the outer side of the low-elasticity bladder 21 in sections, that is, the high-elasticity bladder 22 is attached to the part of the low-elasticity bladder 21 . surface. For example, at least two of the high-elasticity bladders 22 are adhered to the surface of the low-elasticity bladders 21 at intervals. Optionally, the high-elasticity bladder 22 is completely covered on the surface of the low-elasticity bladder 21 .

It should be noted that the above embodiments can be freely combined as required. The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as It is the protection scope of the present invention.

Claims (10)

1. A balloon catheter, comprising:

a three-way tailstock;

a balloon, wherein the balloon comprises at least one high elasticity balloon and at least one low elasticity balloon, wherein the balloon has a chamber;

an outer tube, wherein the outer tube has an outer channel, two ends of the outer tube are respectively connected to the three-way tailstock and the balloon, and the outer channel of the outer tube is communicated with the cavity of the balloon;

an inner tube, wherein both ends of the inner tube are connected to the three-way tailstock and the balloon, respectively, and the inner tube is held within the chamber of the balloon and the outer channel of the outer tube.

2. A balloon catheter according to claim 1, wherein the high-elasticity balloon and the low-elasticity balloon are connected in segments, the high-elasticity balloon and the low-elasticity balloon surrounding the chamber.

3. A balloon catheter according to claim 2, wherein adjacent ones of said elastomeric balloons are disposed at regular intervals.

4. A balloon catheter according to claim 2, wherein adjacent ones of said elastomeric balloons are unevenly spaced.

5. A balloon catheter according to claim 2, wherein the side edges of adjacent high-elasticity balloons and low-elasticity balloons are connected to each other in a laminated manner.

6. A balloon catheter according to claim 2, wherein adjacent high-elasticity balloons and low-elasticity balloons are spliced to each other with their side edges aligned.

7. A balloon catheter according to claim 1, wherein the low-elasticity balloon surrounds the chamber, the high-elasticity balloon being disposed inside or outside the low-elasticity balloon.

8. A balloon catheter according to claim 7, wherein the high elasticity balloon segment is disposed inside or outside the low elasticity balloon.

9. A balloon catheter according to any of claims 1-8, wherein the highly elastic balloon is a polymeric elastic tube.

10. A balloon catheter according to claim 9, further comprising a tip and a visualization ring, wherein the tip is disposed at an end of the balloon and the visualization ring is disposed at the inner tube.

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