CN114099909A

CN114099909A - a balloon catheter

Info

Publication number: CN114099909A
Application number: CN202010882566.7A
Authority: CN
Inventors: 刘洪亚; 虞奇峰; 秦涛
Original assignee: Shanghai Newmed Medical Co Ltd
Current assignee: Shanghai Newmed Medical Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-03-01
Anticipated expiration: 2040-08-28
Also published as: CN114099909B

Abstract

The invention discloses a balloon catheter, comprising a catheter body, including a balloon, an outer tube, an inner tube and a tailstock, wherein the inner tube and the outer tube are respectively installed between the balloon and the tailstock time; a flow guide member, the flow guide member is installed on the outer surface of the balloon of the catheter body, the flow guide member has a flow guide channel, when the balloon is in an expanded state, the blood flow can pass through all the The diversion channel flows along the outer surface of the balloon. The diversion element has a diversion channel, and when the balloon is in an expanded state, the blood outside the balloon can flow along the length of the balloon through the diversion channel, thereby preventing blood flow obstruction and reducing the risk of complications.

Description

Balloon catheter

Technical Field

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

Background

Stenosis of a blood flow channel such as a blood vessel or a valve is a chronic disease common to the elderly, and a patient with severe stenosis of the blood flow channel has been treated by a surgical operation such as surgical blood flow channel replacement, but the surgical operation is very traumatic. The transcatheter implantation has the characteristics of small trauma and low risk, and the method brings good news to patients with serious blood flow channel stenosis, particularly patients who cannot tolerate open chest surgery.

The sacculus expansion lets the constrictive blood flow passageway of blood flow passageway increase blood flow through rate of jam through filling the constrictive blood flow passageway of inflation mechanical expansion to improve patient's whole body blood supply system normal operating, improve patient's quality of life.

At present, the sacculus expansion pipe that the market used can block blood flow channel in the use, increases sacculus both sides blood flow pressure difference, arouses the complication, especially valve stenosis patient, and blood flow blocks can lead to ventricular pressure surge, probably leads to the sacculus aversion, needs temporary pacing, and the sufficient release time of sacculus requires to accomplish in very short time, and the time too short can influence the effect of sacculus expansion artery valve, and the time is longer can arouse the myocardial ischemia scheduling problem. And because the surface of the balloon is smooth, the balloon is easy to slip in the process of filling and opening the narrow blood flow channel.

In view of the foregoing, there is a need for improvements to conventional balloon catheters.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a balloon catheter, wherein a flow guide member with a flow guide channel is welded on the surface of the balloon catheter, the surface of the balloon is coated with the flow guide member, a plurality of flow guide members are longitudinally arranged on the surface of the balloon, so that blood can flow through the flow guide channel in the flow guide member during the balloon filling process, blood flow cannot be blocked, temporary pacing is not required during the operation process, and complications such as myocardial ischemia are reduced.

In order to achieve the above object, an object of the present invention is to provide a balloon catheter comprising:

the catheter comprises a catheter main body and a catheter tail seat, wherein the catheter main body comprises a balloon, an outer tube, an inner tube and a tail seat, and the inner tube and the outer tube are respectively arranged between the balloon and the tail seat;

the flow guide piece is arranged on the outer surface of the balloon of the catheter main body and is provided with a flow guide channel, and when the balloon is in an expanded state, blood can flow along the outer surface of the balloon through the flow guide channel.

In some preferred embodiments of the present invention, the flow guide member is annular, the annular flow guide member surrounds the balloon, and the annular flow guide member has a plurality of flow guide channels.

In some preferred embodiments of the present invention, the flow guide member comprises an inner ring, an outer ring, and a plurality of round tubes located between the inner ring and the outer ring, the round tubes surrounding to form the flow guide channel.

In some preferred embodiments of the present invention, the number of the flow guide members is plural, and the plural flow guide members are arranged in sequence along the length extension direction of the balloon.

In some preferred embodiments of the invention, the plurality of flow guides are uniformly arranged along the length extension of the balloon.

In some preferred embodiments of the present invention, the length of the flow guide member is the same as the length of the balloon, and the outer surface of the flow guide member has flow guide grooves extending along the length of the balloon, the flow guide grooves forming the flow guide channel when the balloon is in the expanded state.

In some preferred embodiments of the present invention, when the balloon catheter is in a contracted state, the flow guide member is contracted, and the side walls of the flow guide grooves of the flow guide member are adjacent to each other.

In some preferred embodiments of the present invention, the flow guide member comprises a plurality of flow guide plates arranged along the circumferential direction of the balloon, and the flow guide grooves between adjacent flow guide plates form the flow guide channel when the balloon is in the expanded state.

In some preferred embodiments of the invention, adjacent ones of the baffles are proximate when the balloon is in the deflated state.

In some preferred embodiments of the present invention, the catheter main body further comprises a support balloon, one end of the support balloon is mounted on the outer surface of the balloon and is communicated with the balloon, the other end of the support balloon is mounted on the flow guide member, and the support balloon is positioned between the balloon and the flow guide member; when the balloon is in the expansion state, fluid is filled in the supporting bag, the flow guide piece is pushed outwards, the flow guide piece and the balloon are far away from each other, and the flow guide channel is formed between the balloon and the flow guide piece.

In some preferred embodiments of the invention, the end of the inner tube near the balloon has a visualization ring.

The balloon catheter provided by the invention has at least one of the following beneficial effects:

1. the guide piece is arranged on the outer side of the balloon catheter, the guide piece is provided with the guide channel, and when the balloon is in an expanded state, blood flow outside the balloon can flow along the length direction of the balloon through the guide channel, so that the blockage of the blood flow can be prevented, and the risk of complications is reduced.

2. The balloon catheter provided by the invention has the advantages that the number of the flow guide parts outside the balloon is multiple, and the multiple flow guide parts are arranged at intervals, so that the balloon catheter can be prevented from sliding with a narrow part when being placed at the narrow part, and the stability of the balloon catheter is improved.

3. The guide groove is formed in the outer side of the guide piece on the outer side of the balloon catheter, when the balloon catheter is in an expansion state, the guide piece expands, and blood flow outside the balloon can flow through the guide groove; when the balloon catheter is in a contraction state, the side walls of the guide grooves of the guide part are close to each other, so that the overall size of the guide part can be reduced, and the balloon catheter is convenient to install in narrow places.

4. A supporting bag is arranged between the balloon outer side flow guide part and the balloon of the balloon catheter, when the balloon is in an opening state, fluid is filled in the supporting bag to open, and the flow guide part is opened outwards, so that a certain gap is formed between the flow guide part and the balloon to form a flow guide channel; the fluid in the balloon is discharged, the fluid in the support balloon is also discharged, the support balloon is contracted, the flow guide part is contracted, and the balloon catheter is reduced in size and is convenient to install in a narrow part.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic perspective view of a balloon catheter according to a first preferred embodiment of the present invention;

FIG. 2 is a side schematic view of a balloon catheter of a first preferred embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a balloon catheter of a first preferred embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a balloon-expanded state of a first variant embodiment of the balloon catheter of the first preferred embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of the balloon of the first variant embodiment of the balloon catheter of the first preferred embodiment of the present invention in a balloon-deflated state;

FIG. 6 is a schematic cross-sectional view of a balloon-expanded state of a second variant embodiment of the balloon catheter of the first preferred embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a balloon-contracted state of a second modified embodiment of the balloon catheter of the first preferred embodiment of the present invention;

fig. 8 is a schematic sectional view of a balloon-expanded state of the balloon catheter of the second preferred embodiment of the present invention.

The reference numbers illustrate:

the catheter comprises a catheter body 1, a guide part 2, a balloon 11, an outer tube 12, an inner tube 13, a tailstock 14, a tip 15, a developing ring 16, a guide channel 20, an inner ring 21, an outer ring 22, a circular tube 23, a guide part 2A, a guide groove 20A, a guide part 2B, a guide plate 21B, a guide groove 20B, a support balloon 17 and a guide part 2C.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Example 1

Referring to the attached drawings 1 to 7 in the specification, the balloon catheter provided by the invention is illustrated, the outer surface of the balloon catheter is provided with a flow guide channel, and during the use of the balloon catheter, blood flow between the balloon and a human body can flow through the flow guide channel outside the balloon, so that the blood flow is kept smooth during the use of the balloon catheter, and the ventricular pressure of a heart is prevented from rising.

Specifically, the balloon catheter comprises a catheter main body 1 and a flow guide 2, wherein the catheter main body 1 comprises a balloon 11, an outer tube 12, an inner tube 13 and a tailstock 14, wherein the outer tube 12 and the inner tube 13 are respectively installed between the balloon 11 and the tailstock 14; the flow guide part 2 is arranged on the outer surface of the balloon 11, and the flow guide part 2 is provided with a flow guide channel 20; after the balloon 11 is expanded, blood flow outside the balloon 11 can flow along the outer surface of the balloon 11 through the diversion channel 20.

It should be noted that, during the use of the conventional balloon catheter, as the fluid is filled into the balloon, the balloon is inflated, and the gap between the balloon and the human valve is reduced, so that the blood flow channel between the balloon and the human valve is blocked, and the blood flow is not smooth. When the balloon catheter provided by the invention is used, when the balloon 11 is expanded and the gap between the balloon 11 and the valve is reduced, the blood flow between the balloon 11 and the valve can flow through the flow guide channel 20 of the flow guide part 2 in the gap between the balloon 11 and the valve, so that the blood flow between the balloon 11 and the valve can be prevented from being blocked.

Further, the flow guiding element 2 is annular, the annular flow guiding element surrounds the balloon 11, and the annular flow guiding element 2 has a plurality of flow guiding channels 20.

It should be noted that the flow guide member 2 is annular, and the annular flow guide member 2 has a plurality of flow guide channels 20 uniformly arranged, so that blood can uniformly flow between the balloon 11 and the valve.

It is understood that, alternatively, the plurality of flow guide channels 20 on the flow guide 2 can also adopt a non-uniform distribution design, and it is understood that the specific arrangement and position of the flow guide channels 20 should not constitute a limitation of the present invention.

Further, the number of the flow guiding members 2 is plural, such as three, and the plural flow guiding members 2 are arranged in sequence along the length extension direction of the balloon 11.

It should be noted that, the plurality of flow guides 2 are arranged in sequence on the outer surface of the balloon 11, which can further improve the efficiency of blood flow; on the other hand, the guide members 2 arranged at intervals can prevent slipping in the process of expanding the narrow aortic membrane by the balloon 11, and improve the stability of operation.

Preferably, a plurality of the flow guides 2 are arranged at regular intervals along the length extension of the balloon 11.

Specifically, the flow guide 2 comprises an inner ring 21, an outer ring 22 and a plurality of round tubes 23 located between the inner ring 21 and the outer ring 22, and the round tubes 23 surround and form the flow guide channel 20. Preferably, the inner ring 21 and the outer ring 22 are respectively fixedly mounted on the circular tube 23, so that the relative positions of the inner ring 21 and the outer ring 22 can be fixed. Preferably, the inner ring 21 is fixedly mounted to the circular tube 23 by welding, and optionally, the inner ring 21 can also be fixedly mounted to the circular tube 23 by gluing. Preferably, the outer ring 22 is fixedly mounted to the circular tube 23 by welding, and optionally, the outer ring 22 can also be fixedly mounted to the circular tube 23 by gluing.

Preferably, the inner ring 21 of the flow guide 2 is fixedly mounted on the outer surface of the balloon 11 by welding. Optionally, the inner ring 21 of the baffle 2 can also be fixedly mounted to the outer surface of the balloon 11 by gluing.

It should be noted that the inner ring 21 and the outer ring 22 of the flow guide 2 are made of elastic material, so as to be able to contract with the contraction of the balloon 11 and expand with the expansion of the balloon 11.

Preferably, after the balloon 11 is filled with an inlet fluid, the circular tubes 23 of the flow guide member 2 are arranged at intervals between the inner ring 21 and the outer ring 22, so that the fluid in the balloon 11 is discharged, and after the balloon 11 is retracted, the circular tubes 23 of the flow guide member 2 can be orderly arranged, so that the circular tubes 23 are prevented from being stacked with each other, and the size of the whole balloon catheter is reduced.

Further, the tailstock 14 is a three-way tailstock, and includes a fluid passage and a working passage. The outer pipe 12 and the inner pipe 13 are hollow pipes, respectively, and the outer pipe 12 surrounds the outer side of the inner pipe 13. The hollow inner tube 13 forms the working channel for the guide wire to pass through; the fluid channel is formed between the outer wall of the inner tube 13 and the inner wall of the outer tube 12, and fluid can enter the balloon 11 after passing through the fluid channel.

The catheter main body 1 further comprises a tip 15, one end of the inner tube 13 is mounted on the tailstock 14 and is communicated with the working channel, and the other end of the inner tube 13 is mounted on the tip 15. Preferably, the tip 15 is mounted on the inner tube 13 by welding, the inner tube 13 is mounted on the tailstock 14 by dispensing, and the outer tube 12 is also mounted on the tailstock 14 by dispensing.

One end of the balloon 11 is mounted at the tip 15, the other end is mounted at one end of the outer tube 12 far away from the tailstock 14, and one end of the outer tube 12 far away from the balloon 11 is mounted at the tailstock 14. Preferably, both ends of the balloon 11 are respectively mounted to the tip 15 and the outer tube 12 by welding.

Fluid can enter the gap between the outer tube 12 and the inner tube 13 through the fluid passage of the tailstock 14 and fill into the balloon 11 to expand the balloon 11. The fluid is a liquid or a gas.

The catheter main body 1 further comprises a developing ring 16, and the developing ring 16 is pressed and held on the inner tube 13 of the catheter main body 1. The visualization ring 16 can be used to identify the location of the balloon 11.

Referring to fig. 4 and 5 of the specification, a first modified embodiment of the balloon catheter provided by the present invention is explained, in which the balloon catheter has substantially the same structure as the above-described embodiment except for a difference in a flow guide member, in which a flow guide member 2A is attached to an outer surface of the balloon 11 and a length of the flow guide member 2A is adapted to a length of the balloon 11, in other words, a length of the flow guide member 2A is the same as a length of the balloon 11.

The outer surface of the flow guide part 2A is provided with a flow guide groove 20A, and the length extending direction of the flow guide groove 20A is consistent with the length extending direction of the balloon 11. When the balloon 11 of the catheter main body 1 is filled with fluid and is in an expanded state, blood flow outside the balloon 11 can flow along the guide groove 20A.

Referring to fig. 5 in the specification, after the fluid in the balloon 11 is discharged, the side walls of the guide grooves 20A approach each other after the balloon 11 is deflated, and the guide member 2A is deflated to reduce the overall size of the guide member 2A. When the flow guide part 2A is installed at a narrow part to be expanded, fluid is filled into the balloon 11, the balloon 11 expands and drives the flow guide part 2A to expand, and the side walls of the flow guide groove 20A of the flow guide part 2A are separated, so that blood can flow in the flow guide groove 20A.

Referring to fig. 6 and 7 of the specification, a second variant embodiment of the balloon catheter provided by the present invention is illustrated, in which substantially the same as the above-described preferred embodiment of the balloon catheter, except for the difference in the flow guide, in which the flow guide 2B includes a plurality of flow deflectors 21B, the plurality of flow deflectors 21B being arranged along the length direction of the balloon 11.

Preferably, the baffles 21B of the flow guide member 2B are fixedly mounted on the outer surface of the balloon 11 by welding. Optionally, the diversion plate 21B of the diversion member 2B is fixedly mounted on the outer surface of the balloon 11 by means of dispensing.

Fluid is filled in the balloon 11, after the balloon 11 is expanded, the guide plates 21B are arranged at intervals on the outer surface of the balloon 11, and guide grooves 20B are formed between adjacent guide plates 21B for blood flow outside the balloon 11 to flow through. In other words, in the second modified embodiment, the guide grooves 20B between the adjacent guide plates 21B form a guide passage.

After the fluid in the balloon 11 is discharged, the guide pieces 2B are contracted along with the contraction of the balloon 11 after the balloon is contracted, and the adjacent guide plates 21B can be close to each other, so that the overall size of the guide pieces 2B can be reduced. After filling fluid into the balloon 11, the balloon 11 is expanded, and the balloon 11 carries the diversion piece 2B to expand, and the adjacent diversion plates 21B are separated to form the diversion groove 20B for blood flow to pass through.

Optionally, in other preferred embodiments of the present invention, the flow guide 2B is a hollow ring surrounding the balloon 11, and the flow guide 2B has a hollow channel therein, so that when the balloon is expanded, blood flows through the hollow channel.

Example 2

Referring to fig. 8 of the specification, a second preferred embodiment of the balloon catheter provided by the present invention is illustrated, which is substantially the same as the balloon provided by the first embodiment described above, except for the balloon and the flow guide.

In the second preferred embodiment of the balloon catheter, the catheter main body 1 further comprises a plurality of support balloons 17, the plurality of support balloons 17 are respectively mounted on the balloons 11 and respectively communicate with the balloons 11, and the support balloons 17 are located between the balloons 11 and the flow guide 2C. One end of the supporting bag 17 is mounted on the balloon 11 and communicated with the balloon 11, and the other end of the supporting bag 17 is mounted on the flow guide member 2C.

In the second preferred embodiment, when the balloon 11 is filled with fluid and expanded, the fluid in the balloon 11 can enter the supporting bag 17 and open the supporting bag 17, the supporting bag 17 pushes the flow guide member 2C outwards, so that the flow guide member 2C is separated from the balloon 11, and the flow guide channel 20 is formed between the balloon 11 and the flow guide member 2C for blood to pass through.

Preferably, the flow guide 2C is annular and the flow guide 2C is made of an elastic material. A plurality of the support cells 17 are spaced around the balloon 11. When fluid is filled into the balloon 11, the plurality of support cells 17 can be expanded simultaneously and the annular flow guide member 2C is expanded outward.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. a balloon catheter, is characterized in that, comprises:

a catheter body, comprising a balloon, an outer tube, an inner tube and a tailstock, the inner tube and the outer tube are respectively installed between the balloon and the tailstock;

A flow guide piece, the flow guide piece is installed on the outer surface of the balloon of the catheter body, the flow guide piece has a flow guide channel, and when the balloon is in an expanded state, blood flow can pass through the guide tube Flow channels flow along the outer surface of the balloon.

2 . The balloon catheter according to claim 1 , wherein the flow guide is annular, the annular flow guide surrounds the balloon, and the annular flow guide There are a plurality of the guide channels.

3. The balloon catheter of claim 2, wherein the flow guide comprises an inner ring, an outer ring, and a plurality of circular tubes between the inner ring and the outer ring, the A circular tube surrounds and forms the guide channel.

4 . The balloon catheter according to claim 2 , wherein the number of the flow guides is plural, and the plurality of the flow guides are sequentially arranged along the lengthwise extending direction of the balloon. 5 .

5 . The balloon catheter according to claim 4 , wherein a plurality of the flow guides are uniformly arranged along the lengthwise extending direction of the balloon. 6 .

6 . The balloon catheter according to claim 1 , wherein the length of the flow guide is the same as the length of the balloon, and the outer surface of the flow guide has a direction along the length of the balloon. 7 . The extending guide groove forms the guide channel when the balloon is in the expanded state.

7 . The balloon catheter according to claim 6 , wherein when the balloon catheter is in a retracted state, the air guide member is retracted, and the side wall of the air guide groove of the air guide member is retracted. 8 . close.

8 . The balloon catheter of claim 1 , wherein the deflector comprises a plurality of deflectors disposed along the circumference of the balloon, when the balloon is in the expansion state. 9 . In the state, the guide grooves between the adjacent guide plates form the guide channels.

9 . The balloon catheter according to claim 8 , wherein when the balloon is in a deflated state, the adjacent baffles of the flow guide are close to each other. 10 .

10 . The balloon catheter according to claim 1 , wherein the catheter body further comprises a support balloon, and one end of the support balloon is mounted on the outer surface of the balloon and connected with the balloon. 11 . the other end is installed on the flow guide, and the support bag is located between the balloon and the flow guide; when the balloon is in the expanded state, the support bag is filled with fluid , and push the flow guide member outward, the flow guide member and the balloon are away from each other, and the flow guide channel is formed between the balloon and the flow guide member.