A balloon catheter

Abstract

The present invention discloses a balloon catheter, which comprises a three-way tail seat, 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, wherein the balloon has a chamber, wherein the outer tube has an outer channel, the two ends of the outer tube are respectively connected to the three-way tail seat and the balloon, and the outer channel of the outer tube is connected to the chamber of the balloon, wherein the two ends of the inner tube are respectively connected to the three-way tail seat and the balloon, and the inner tube is maintained in the chamber of the balloon and the outer channel of the outer tube. The balloon catheter has fast pressure relief, which is conducive to reducing surgical risks.

Description

Technical Field

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

[0002] Balloon catheters are common medical devices in the medical field and are usually used to expand the lesion of the patient in order to treat the lesion. Traditional balloon catheters usually include a balloon, an outer tube, an inner tube, and a tail seat. When in use, the balloon is placed at the site to be expanded, and then liquid or gas is filled into the balloon through the tail seat and the outer tube to expand the balloon to expand the site to be expanded. After the expansion is completed, the liquid or gas in the balloon is released through the tail seat and the outer tube, the balloon retracts, and the volume of the balloon decreases.

[0003] It should be pointed out that when removing the balloon catheter, it is necessary to wait until the balloon of the balloon catheter is completely retracted and its volume is reduced before the balloon can be removed. When the balloon of the traditional balloon catheter is retracted, it relies on the elastic recovery force of the balloon itself, and the retraction process is slow. The balloon catheter needs to be placed in the patient's body for a long time, increasing the risk of other complications in the patient. In addition, the outer diameter of the effective section of the existing balloon catheter is consistent after the balloon is expanded. During the expansion process, the balloon is prone to slipping due to the flushing of blood flow.

[0004] In summary, there is a need to improve the traditional balloon catheter. Summary of the invention

[0005] In view of the technical problems of the existing balloon catheters such as long pressure relief time and easy slipping, the object of the present invention is to provide a balloon catheter that can quickly relieve pressure and prevent slipping during use.

[0006] In order to achieve the above object, the present invention provides a balloon catheter, comprising:

[0007] Three-way tailstock;

[0008] A balloon, wherein the balloon comprises at least one high-elasticity balloon body and at least one low-elasticity balloon body, wherein the balloon has a chamber;

[0009] An outer tube, wherein the outer tube has an outer channel, two ends of the outer tube are respectively connected to the three-way tail seat and the balloon, and the outer channel of the outer tube is connected to the chamber of the balloon;

[0010] An inner tube, wherein both ends of the inner tube are connected to the three-way tail seat and the balloon respectively, and the inner tube is retained in the chamber of the balloon and the outer channel of the outer tube.

[0011] 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 and form the chamber.

[0012] In some preferred embodiments of the present invention, adjacent highly elastic bladders are evenly spaced.

[0013] In some preferred embodiments of the present invention, adjacent highly elastic bladders are arranged at uneven intervals.

[0014] In some preferred embodiments of the present invention, the sides of adjacent high-elasticity bladders and low-elasticity bladders are laminated and connected to each other.

[0015] In some preferred embodiments of the present invention, the sides of adjacent high-elasticity bladders and low-elasticity bladders are aligned and spliced ​​to each other.

[0016] In some preferred embodiments of the present invention, the low-elasticity sac surrounds and forms the chamber, and the high-elasticity sac is disposed on the inner side or the outer side of the low-elasticity sac.

[0017] In some preferred embodiments of the present invention, the high-elasticity bladder is segmentedly arranged on the inner side or the outer side of the low-elasticity bladder.

[0018] In some preferred embodiments of the present invention, the highly elastic capsule is a polymer elastic tube.

[0019] In some preferred embodiments of the present invention, the balloon catheter further comprises a tip and a developing ring, wherein the tip is disposed at an end of the balloon, and the developing ring is disposed at the inner tube.

[0020] Compared with the prior art, the balloon catheter provided by the present invention has at least one of the following beneficial effects:

[0021] 1. The present invention improves the balloon of the balloon catheter, wherein the balloon is composed of a low-elasticity balloon body and a high-elasticity balloon body. When the liquid in the chamber of the balloon is withdrawn, the low-elasticity balloon body and the high-elasticity balloon body release elastic potential energy. The high-elasticity balloon body has strong elasticity, which drives the low-elasticity balloon body to rebound quickly, and the pressure relief speed is fast.

[0022] 2. In some embodiments of the present invention, the high-elasticity capsule of the balloon is spliced ​​with the low-elasticity capsule, and the balloon is a segmented balloon. When the liquid fills the chamber of the balloon, the low-elasticity capsule and the high-elasticity capsule are deformed and expand outward. Since the elasticity of the high-elasticity capsule is greater than that of the low-elasticity capsule, the deformation degree of the high-elasticity capsule is greater than that of the low-elasticity capsule, and thus the surface of the balloon is uneven, so that the balloon is not easy to slip during the process of being expanded. 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 cross-sectional view of a balloon catheter according to a first preferred embodiment of the present invention;

[0025] Figure 2 is a 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 cross-sectional view of a balloon catheter for aortic valve dilation according to a second preferred embodiment of the present invention;

[0027] Figure 4 It is a cross-sectional view of the balloon catheter for aortic valve dilation in the expanded state according to the preferred embodiment of the present invention.

[0028] Description of Figure Numbers:

[0029] The balloon catheter 100 includes a tip 10 , a balloon 20 , an inner tube 30 , an outer tube 40 , a three-way tail seat 50 , a developing ring 60 , a chamber 201 , an inner channel 301 , an outer channel 401 , a low-elasticity capsule 21 , and a high-elasticity capsule 22 . DETAILED DESCRIPTION

[0030] 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.

[0031] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0032] Reference Manual Attached Figure 1 to Figure 2A balloon catheter 100 according to a first preferred embodiment of the present invention will be explained in the following description, wherein the balloon catheter 100 is particularly a balloon catheter for aortic valve dilation, wherein the balloon catheter 100 has a fast pressure relief speed and a short pressure relief time, which is beneficial to reducing the risk of aortic valve surgery, and furthermore, the balloon catheter 100 can form a concave-convex structure when in an expanded state, and is not easy to slip.

[0033] The balloon catheter 100 includes a tip 10, a balloon 20, an inner tube 30, an outer tube 40, a three-way tail seat 50, and a developing ring 60, wherein the balloon 20 has a chamber 201, the inner tube 30 has an inner channel 301, and the outer tube 40 has an outer channel 401. The tip 10 and the outer tube 40 are respectively arranged at the two ends of the balloon 20, and the outer channel 401 of the outer tube 40 is connected to the chamber 201 of the balloon 20. The other end of the outer tube 40 is fixed to the three-way tail seat 50. The two ends of the inner tube 30 are respectively fixed to the end of the balloon 20 and the three-way tail seat 50, and the inner tube 30 is held in the chamber 201 of the balloon 20 and the outer channel 401 of the outer tube 40. The developing ring 60 is pressed and gripped on the inner tube 30 to facilitate the doctor's observation during surgery.

[0034] Preferably, the tip 10 and the outer tube 40 are fixed to the balloon 20 by welding. The tip 10 is convenient for passing through blood vessels and crossing valves during surgery, and the outer tube 40 is used to guide the flow of liquid.

[0035] Preferably, the inner tube 30 and the outer tube 40 are fixed to the three-way tailstock 50 by glue dispensing.

[0036] Those skilled in the art should understand that the fixing method of the tip 10, the outer tube 40 and the balloon 20 and the specific fixing method of the inner tube 30, the outer tube 40 and the three-way tail seat 50 are merely examples and cannot be a limitation on the content and scope of the balloon catheter 100 described in the present invention.

[0037] The balloon 20 includes at least one low-elasticity capsule 21 and at least one high-elasticity capsule 22, wherein the high-elasticity capsule 22 is arranged in the low-elasticity capsule 21. During the operation, the liquid is filled into the chamber 201 of the balloon 20 through the side hole of the three-way tail seat 50, and the low-elasticity capsule 21 and the high-elasticity capsule 22 are deformed and expanded to expand the aortic valve stenosis. When the liquid in the chamber 201 of the balloon 20 is withdrawn, the low-elasticity capsule 21 and the high-elasticity capsule 22 release elastic potential energy, and the high-elasticity capsule 22 rebounds quickly, which speeds up the pressure relief, saves the pressure relief time, and is conducive to reducing the risk of surgery.

[0038] Reference Manual Attached Figure 1 and Figure 2 In a specific example of the present invention, the high elastic capsule 22 is connected to the low elastic capsule 21 in sections, and the high elastic capsule 22 and the low elastic capsule 21 together surround the chamber 201, and the balloon 20 is a segmented balloon. Specifically, the high elastic capsule 22 is connected to the low elastic capsule end to end, and the high elastic capsule 22 and the low elastic capsule 21 together surround the chamber 201. When the liquid fills the chamber 201 of the balloon 20, the low elastic capsule 21 and the high elastic capsule 22 are deformed and expanded outward. Since the elasticity of the high elastic capsule 22 is greater than the elasticity of the low elastic capsule 21, the deformation degree of the high elastic capsule 22 is greater than the deformation degree of the low elastic capsule 21, and thus the surface of the balloon 20 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 capsule 21 and the high-elasticity capsule 22 release elastic potential energy. The high-elasticity capsule 22 has strong elasticity, which drives the low-elasticity capsule 21 to rebound quickly, resulting in a fast pressure relief speed and a short pressure relief time.

[0039] Preferably, the high elastic capsule 22 and the low elastic capsule 21 are connected to each other by welding. Optionally, the high elastic capsule 22 and the low elastic capsule 21 are connected to each other by bonding. The specific connection method of the high elastic capsule 21 and the low elastic capsule 21 is not limited.

[0040] Furthermore, the specific number and specific distribution of the low-elastic capsule 21 and the high-elastic capsule 22 are not limited. The low-elastic capsule 21 and the high-elastic capsule 22 can be implemented as one, two, or more than two. Preferably, two adjacent high-elastic capsules 22 are arranged at intervals at both ends of the low-elastic capsule 21. Optionally, the adjacent high-elastic capsules 22 are evenly arranged at intervals at the low-elastic capsule 21, that is, the width of each low-elastic capsule 21 is consistent. Optionally, the adjacent high-elastic capsules 22 are unevenly arranged at intervals at the low-elastic capsule 21, that is, the distances between the adjacent high-elastic capsules 22 are inconsistent, and the width of each low-elastic capsule 21 is inconsistent. Preferably, two adjacent low-elastic capsules 21 are arranged at intervals at both ends of the high-elastic capsule 22. Optionally, the adjacent low-elastic capsules 21 are evenly arranged at intervals at the high-elastic capsule 22, that is, the width of each high-elastic capsule 22 is consistent. Optionally, the distances between adjacent low-elasticity capsules 21 are inconsistent, that is, the widths of each high-elasticity capsule 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 capsule 21 and the high-elasticity capsule 22 are only examples and cannot be used to limit the content and scope of the balloon catheter 100 for dilating the aortic valve of the present invention.

[0041] Preferably, in this preferred embodiment, the sides of the adjacent high elastic capsule 22 and low elastic capsule 21 are laminated and connected to each other. When the high elastic capsule 22 and the low elastic capsule 21 are connected, the sides of the high elastic capsule 22 and the low elastic capsule 21 are laminated and arranged first, and then the sides of the high elastic capsule 22 and the low elastic capsule 21 are laminated and connected by welding, gluing, etc. It can be understood that the specific method of connecting the high elastic capsule 22 and the low elastic capsule 21 should not constitute a limitation to the present invention.

[0042] Optionally, the sides of the high elastic capsule 22 and the low elastic capsule 21 are aligned and spliced. When the high elastic capsule 22 and the low elastic capsule 21 are connected, the sides of the high elastic capsule 22 and the low elastic capsule 21 are first spliced ​​and aligned, and then the sides of the high elastic capsule 22 and the low elastic capsule 21 are spliced ​​and connected by welding, gluing, etc. It is understandable that the way of splicing and connecting the sides of the high elastic capsule 22 and the low elastic capsule 21 should not constitute a limitation to the present invention.

[0043] It is worth noting that the elasticity of the low elastic capsule 21 and the high elastic capsule 22 of the present invention is relative and does not refer to the type of specific elastic material. At the same time, it can be understood that the low elastic capsule 21 may also have no elasticity. Preferably, the high elastic capsule 22 is implemented as a polymer elastic tube.

[0044] Reference Manual Attached Figure 3 and Figure 4 In the second preferred embodiment of the present invention, the low-elasticity capsule 21 surrounds the chamber 201, and the high-elasticity capsule 22 is arranged on the inner side or the outer side of the low-elasticity capsule 21. The high-elasticity capsule 22 is attached to the surface of the low-elasticity capsule 21. When the liquid in the chamber 201 of the balloon 20 is withdrawn, the low-elasticity capsule 21 and the high-elasticity capsule 22 release elastic potential energy. The high-elasticity capsule 22 has strong elasticity, which drives the low-elasticity capsule 21 to rebound quickly, thereby increasing the pressure relief speed, saving the pressure relief time, and helping to reduce the risk of surgery.

[0045] Preferably, the high elastic capsule 22 is attached to the inner surface of the low elastic capsule 21. Optionally, the high elastic capsule 22 is attached to the outer surface of the low elastic capsule 21.

[0046] Preferably, the high elastic capsule 22 is arranged in sections on the inner side or the outer side of the low elastic capsule 21, that is, the high elastic capsule 22 is attached to a part of the surface of the low elastic capsule 21. For example, at least two high elastic capsules 22 are attached to the surface of the low elastic capsule 21 at intervals. Optionally, the high elastic capsule 22 is completely covered on the surface of the low elastic capsule 21.

[0047] 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: Three-way tailstock; A balloon, wherein the balloon comprises at least one high-elasticity capsule and at least one low-elasticity capsule, wherein the high-elasticity capsule and the low-elasticity capsule are connected in sections, the high-elasticity capsule and the low-elasticity capsule are surrounded by a chamber, and two adjacent high-elasticity capsules are arranged at intervals at both ends of the low-elasticity capsule, so that a concave-convex structure can be formed when the balloon catheter is in an expanded state; An outer tube, wherein the outer tube has an outer channel, two ends of the outer tube are respectively connected to the three-way tail seat and the balloon, and the outer channel of the outer tube is connected to the chamber of the balloon; An inner tube, wherein both ends of the inner tube are connected to the three-way tail seat and the balloon respectively, and the inner tube is retained in the chamber of the balloon and the outer channel of the outer tube.

2. The balloon catheter according to claim 1, characterized in that: The adjacent high-elasticity capsules are evenly spaced.

3. The balloon catheter according to claim 1, characterized in that: The adjacent high-elasticity capsules are arranged at uneven intervals.

4. The balloon catheter according to claim 1, characterized in that: The sides of the adjacent high-elasticity sacs and low-elasticity sacs are laminated and connected to each other.

5. The balloon catheter according to claim 1, characterized in that: The sides of the adjacent high-elasticity sacs and low-elasticity sacs are aligned and spliced ​​to each other.

6. The balloon catheter according to any one of claims 1 to 5, characterized in that: The high elastic capsule is a high molecular elastic tube.

7. The balloon catheter according to claim 6, characterized in that: It further includes a tip and a developing ring, wherein the tip is disposed at the end of the balloon, and the developing ring is disposed at the inner tube.

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