A balloon catheter

Abstract

The present invention discloses a balloon catheter, comprising: a catheter body, including a balloon, an outer tube, an inner tube and a tail seat, wherein the inner tube and the outer tube are respectively installed between the balloon and the tail seat; a flow guide, wherein the flow guide is installed on the outer surface of the balloon of the catheter body, and the flow guide has a flow guide channel, and when the balloon is in an expanded state, blood flow can flow along the outer surface of the balloon through the flow guide channel. The flow guide has a flow 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 flow guide channel, thereby preventing blood flow obstruction and reducing the risk of complications.

Description

Technical Field

[0001] The present invention relates to the medical field, and further to a balloon catheter. Background Art

[0002] Blood flow channel stenosis such as blood vessels or valves is a common chronic disease in the elderly. For patients with severe blood flow channel stenosis, surgical blood flow channel replacement and other operations were previously used for treatment, but surgical operations are very traumatic. Transcatheter implantation has the characteristics of less trauma and lower risk. This method is a blessing for patients with severe blood flow channel stenosis, especially those who cannot tolerate open-chest surgery.

[0003] Balloon dilatation mechanically expands narrow blood flow channels through filling and expansion, allowing blocked blood flow channels to increase blood flow rate, thereby improving the normal operation of the patient's systemic blood supply system and improving the patient's quality of life.

[0004] At present, the balloon dilatation catheters used in the market will block the blood flow channel during use, increase the blood pressure difference on both sides of the balloon, and cause complications, especially for patients with valvular stenosis. Blood flow blockage will cause a sudden increase in ventricular pressure, which may cause balloon displacement and require temporary pacing. The balloon filling and decompression time must be completed in a very short time. If the time is too short, it will affect the effect of balloon dilatation of the arterial valve, and if the time is too long, it will cause myocardial ischemia and other problems. And because the surface of the balloon is smooth, it is easy to slip during the process of balloon filling to open the narrow blood flow channel.

[0005] In summary, there is a need to improve the traditional balloon catheter. Summary of the invention

[0006] In view of the above technical problems, the purpose of the present invention is to provide a balloon catheter, the surface of which is welded with a guide piece with a guide channel, covering the surface of the balloon, and a plurality of guide pieces are arranged longitudinally on the surface of the balloon, so that blood can flow through the guide channel in the guide piece during balloon filling, and blood flow will not be blocked. Temporary pacing is not required during the operation, and the occurrence of complications such as myocardial ischemia is reduced. Moreover, since the guide pieces are arranged longitudinally on the surface of the balloon, the balloon is not easy to slip during the process of filling and expanding the narrowed arterial valve.

[0007] In order to achieve the above object, the object of the present invention is to provide a balloon catheter, comprising:

[0008] The catheter body comprises a balloon, an outer tube, an inner tube and a tail seat, wherein the inner tube and the outer tube are respectively installed between the balloon and the tail seat;

[0009] A flow guide is installed on the outer surface of the balloon of the catheter body, and the flow guide has a flow guide channel. When the balloon is in an expanded state, blood can flow along the outer surface of the balloon through the flow guide channel.

[0010] In some preferred embodiments of the present invention, the guide member is annular, surrounds the balloon, and has a plurality of guide channels.

[0011] In some preferred embodiments of the present invention, the flow guide comprises an inner ring, an outer ring and a plurality of circular tubes located between the inner ring and the outer ring, and the circular tubes surround and form the flow guide channel.

[0012] In some preferred embodiments of the present invention, there are multiple flow guides, and the multiple flow guides are arranged in sequence along the length extension direction of the balloon.

[0013] In some preferred embodiments of the present invention, the plurality of flow guides are evenly arranged along the length extension direction of the balloon.

[0014] In some preferred embodiments of the present invention, the length of the guide member is the same as the length of the balloon, and the outer surface of the guide member has a guide groove extending along the length direction of the balloon, and when the balloon is in the expanded state, the guide groove forms the guide channel.

[0015] In some preferred embodiments of the present invention, when the balloon catheter is in a contracted state, the flow guide is contracted and the side walls of the flow guide groove of the flow guide are close to each other.

[0016] In some preferred embodiments of the present invention, the guide member includes a plurality of guide plates arranged along the circumference of the balloon, and when the balloon is in the expanded state, guide grooves between adjacent guide plates form the guide channel.

[0017] In some preferred embodiments of the present invention, when the balloon is in a contracted state, adjacent guide plates of the guide member are in close contact with each other.

[0018] In some preferred embodiments of the present invention, the catheter body also includes a support balloon, one end of which is installed on the outer surface of the balloon and communicated with the balloon, and the other end is installed on the guide member, and the support balloon is located between the balloon and the guide member; when the balloon is in the expanded state, the support balloon is filled with fluid and pushes the guide member outward, the guide member and the balloon move away from each other, and the guide channel is formed between the balloon and the guide member.

[0019] In some preferred embodiments of the present invention, the inner tube has a developing ring at one end close to the balloon.

[0020] The balloon catheter provided by the present invention has at least one of the following beneficial effects:

[0021] 1. A flow guide is installed on the outside of the balloon of the balloon catheter provided by the present invention. The flow guide has a flow guide channel. When the balloon is in an expanded state, the blood outside the balloon can flow along the length direction of the balloon through the flow guide channel, thereby preventing blood flow blockage and reducing the risk of complications.

[0022] 2. The balloon catheter provided by the present invention has a plurality of flow guides on the outside of the balloon, and the plurality of flow guides are arranged at intervals, so that when placed in a narrow area, the balloon catheter can be prevented from sliding against the narrow area, thereby improving the stability of the balloon catheter.

[0023] 3. The guide piece on the outside of the balloon of the balloon catheter provided by the present invention has a guide groove on the outside. When the balloon catheter is in an expanded state, the guide piece expands, and the blood flow outside the balloon can flow through the guide groove; when the balloon catheter is in a contracted state, the side walls of the guide groove of the guide piece are close to each other, thereby reducing the overall size of the guide piece and facilitating installation in narrow places.

[0024] 4. The balloon catheter provided by the present invention has a support bag between the balloon outer guide piece and the balloon. When the balloon is in an open state, the support bag is filled with fluid and opens, and the guide piece is pushed outward, so that there is a certain gap between the guide piece and the balloon, forming a guide channel; when the fluid in the balloon is discharged, the fluid in the support bag is also discharged, the support bag shrinks, the guide piece shrinks, and the size of the balloon catheter is reduced, which is convenient for installation in narrow places. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0026] Figure 1 is a three-dimensional schematic diagram of a balloon catheter according to a first preferred embodiment of the present invention;

[0027] Figure 2 is a side schematic diagram of a balloon catheter according to a first preferred embodiment of the present invention;

[0028] Figure 3 is a cross-sectional schematic diagram of a balloon catheter according to a first preferred embodiment of the present invention;

[0029] Figure 4 is a cross-sectional schematic diagram of a balloon expansion state of a first modified implementation manner of a balloon catheter of a first preferred embodiment of the present invention;

[0030] Figure 5 is a cross-sectional schematic diagram of a balloon contraction state of a first modified implementation manner of a balloon catheter of a first preferred embodiment of the present invention;

[0031] Figure 6 is a cross-sectional schematic diagram of a balloon expansion state of a second modified implementation of the balloon catheter of the first preferred embodiment of the present invention;

[0032] Figure 7 is a cross-sectional schematic diagram of a balloon contraction state of a second modified embodiment of the balloon catheter of the first preferred embodiment of the present invention;

[0033] Figure 8 It is a schematic cross-sectional view of a balloon catheter in a balloon expanded state according to a second preferred embodiment of the present invention.

[0034] Description of Figure Numbers:

[0035] 1 catheter body, 2 guide piece, 11 balloon, 12 outer tube, 13 inner tube, 14 tail seat, 15 tip, 16 developing ring, 20 guide channel, 21 inner ring, 22 outer ring, 23 round tube, 2A guide piece, 20A guide groove, 2B guide piece, 21B guide plate, 20B guide groove, 17 support capsule, 2C guide piece. DETAILED DESCRIPTION

[0036] 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.

[0037] In order to simplify the drawings, only the parts related to the 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".

[0038] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] Example 1

[0042] Reference Manual Attached Figures 1 to 7 The balloon catheter provided by the present invention is described, and the outer surface of the balloon of the balloon catheter has a diversion channel. During the use of the balloon catheter, the blood flow between the balloon and the human body can flow through the diversion channel outside the balloon to maintain smooth blood flow during the use of the balloon catheter and avoid an increase in the ventricular pressure of the heart.

[0043] Specifically, the balloon catheter includes a catheter body 1 and a guide member 2, wherein the catheter body 1 includes a balloon 11, an outer tube 12, an inner tube 13 and a tail seat 14, wherein the outer tube 12 and the inner tube 13 are respectively installed between the balloon 11 and the tail seat 14; the guide member 2 is installed on the outer surface of the balloon 11, and the guide member 2 has a guide channel 20; when the balloon 11 is expanded, the blood flow outside the balloon 11 can flow along the outer surface of the balloon 11 through the guide channel 20.

[0044] It should be noted that during the use of a conventional balloon catheter, as the balloon is filled with fluid, the balloon expands, and the gap between the balloon and the human valve decreases, which may cause the blood flow channel between the balloon and the human valve to be blocked, resulting in poor blood flow. However, when using the balloon catheter provided by the present invention, when the balloon 11 expands and the gap between the balloon 11 and the valve decreases, the blood flow between the balloon 11 and the valve can flow through the guide channel 20 of the guide member 2 in the gap between the balloon 11 and the valve, thereby preventing blood flow blockage between the balloon 11 and the valve.

[0045] Furthermore, the guide member 2 is annular in shape, surrounds the balloon 11 , and has a plurality of guide channels 20 .

[0046] It should be noted that the guide member 2 is annular, and the annular guide member 2 has a plurality of evenly arranged guide channels 20, so that the blood between the balloon 11 and the valve can flow evenly.

[0047] It is understandable that, optionally, the plurality of guide channels 20 on the guide member 2 can also be designed in a non-uniform distribution. It is understandable that the specific arrangement form and position of the guide channels 20 should not constitute a limitation to the present invention.

[0048] Furthermore, there are multiple flow guide members 2 , for example, three, and the multiple flow guide members 2 are arranged in sequence along the length extension direction of the balloon 11 .

[0049] It should be pointed out that the multiple guide members 2 are arranged in sequence on the outer surface of the balloon 11, which can further improve the efficiency of blood flow on the one hand; on the other hand, the multiple guide members 2 arranged at intervals can prevent slipping during the process of the balloon 11 expanding the narrow aortic membrane, thereby improving the stability of the operation.

[0050] Preferably, the plurality of flow guide members 2 are evenly spaced and arranged along the length extension direction of the balloon 11 .

[0051] Specifically, the guide member 2 includes an inner ring 21, an outer ring 22, and a plurality of circular tubes 23 located between the inner ring 21 and the outer ring 22, and the circular tubes 23 surround and form a guide channel 20. Preferably, the inner ring 21 and the outer ring 22 are fixedly mounted on the circular tubes 23, respectively, 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 on the circular tube 23 by welding, and optionally, the inner ring 21 can also be fixedly mounted on the circular tube 23 by gluing. Preferably, the outer ring 22 is fixedly mounted on the circular tube 23 by welding, and optionally, the outer ring 22 can also be fixedly mounted on the circular tube 23 by gluing.

[0052] Preferably, the inner ring 21 of the guide member 2 is fixedly mounted on the outer surface of the balloon 11 by welding. Optionally, the inner ring 21 of the guide member 2 can also be fixedly mounted on the outer surface of the balloon 11 by gluing.

[0053] It should be pointed out that the inner ring 21 and the outer ring 22 of the guide member 2 are respectively made of elastic materials, so that they can shrink as the balloon 11 shrinks and expand as the balloon 11 expands.

[0054] Preferably, after the fluid is filled into the balloon 11, the circular tubes 23 of the guide member 2 are spaced apart from each other between the inner ring 21 and the outer ring 22 to allow the fluid in the balloon 11 to be discharged; after the balloon 11 is retracted, the circular tubes 23 of the guide member 2 can be arranged in an orderly manner to prevent the circular tubes 23 from stacking on each other, thereby reducing the overall size of the balloon catheter.

[0055] Furthermore, the tailstock 14 is a three-way tailstock, including a fluid channel and a working channel. The outer tube 12 and the inner tube 13 are respectively hollow pipes, and the outer tube 12 surrounds the outer side of the inner tube 13. The hollow inner tube 13 forms the working channel for the guide wire to pass through; the outer wall of the inner tube 13 and the inner wall of the outer tube 12 surround the fluid channel, and the fluid can enter the balloon 11 after passing through the fluid channel.

[0056] The catheter body 1 further includes a tip 15, one end of the inner tube 13 is mounted on the tailstock 14 and communicates 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 glue dispensing, and the outer tube 12 is also mounted on the tailstock 14 by glue dispensing.

[0057] One end of the balloon 11 is mounted on the tip 15, and the other end is mounted on the end of the outer tube 12 away from the tail seat 14, and the end of the outer tube 12 away from the balloon 11 is mounted on the tail seat 14. Preferably, the two ends of the balloon 11 are mounted on the tip 15 and the outer tube 12 respectively by welding.

[0058] The fluid can enter the gap between the outer tube 12 and the inner tube 13 through the fluid channel of the tailstock 14 and fill into the balloon 11 to expand the balloon 11. The fluid is liquid or gas.

[0059] The catheter body 1 further includes a developing ring 16, which is pressed and gripped on the inner tube 13 of the catheter body 1. The developing ring 16 can be used to mark the position of the balloon 11.

[0060] Reference Manual Attached Figure 4 and Figure 5The first variant implementation mode of the balloon catheter provided by the present invention is described. In the first variant implementation mode, the structure of the balloon catheter is roughly the same as that of the above-mentioned embodiment, except that the guide member is different. In the first variant implementation mode, the guide member 2A is installed on the outer surface of the balloon 11, and the length of the guide member 2A is adapted to the length of the balloon 11. In other words, the length of the guide member 2A is the same as the length of the balloon 11.

[0061] The outer surface of the guide member 2A has a guide groove 20A, and the length extension direction of the guide groove 20A is consistent with the length extension direction of the balloon 11. When the balloon 11 of the catheter body 1 is filled with fluid and is in an expanded state, the blood flow outside the balloon 11 can flow along the guide groove 20A.

[0062] Reference Manual Attached Figure 5 , the fluid in the balloon 11 is discharged, and after the balloon 11 shrinks, the side walls of the guide groove 20A are close to each other, and the guide member 2A shrinks to reduce the overall size of the guide member 2A. When the guide member 2A is installed in the narrow part to be expanded, the balloon 11 is filled with fluid, the balloon 11 expands, and drives the guide member 2A to expand, and the side walls of the guide groove 20A of the guide member 2A are separated, allowing blood to flow in the guide groove 20A.

[0063] Reference Manual Attached Figure 6 and Figure 7 The second variant embodiment of the balloon catheter provided by the present invention is described. In the second variant embodiment of the balloon catheter, it is roughly the same as the above-mentioned preferred embodiment of the balloon catheter, except that the guide member is different. In the second variant embodiment, the guide member 2B includes a plurality of guide plates 21B, and the plurality of guide plates 21B are arranged along the length direction of the balloon 11.

[0064] Preferably, the plurality of guide plates 21B of the guide member 2B are fixedly mounted on the outer surface of the balloon 11 by welding. Optionally, the guide plates 21B of the guide member 2B are fixedly mounted on the outer surface of the balloon 11 by glue dispensing.

[0065] The balloon 11 is filled with fluid, and 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 variant embodiment, the guide grooves 20B between adjacent guide plates 21B form a guide channel.

[0066] After the fluid in the balloon 11 is discharged and the balloon contracts, the guide member 2B contracts along with the contraction of the balloon 11, and the adjacent guide plates 21B can be brought closer to each other, thereby reducing the overall size of the guide member 2B. After the balloon 11 is filled with fluid, the balloon 11 expands, and the balloon 11 carries the guide member 2B to expand, and the adjacent guide plates 21B separate to form the guide groove 20B for blood flow to pass through.

[0067] Optionally, in some other preferred embodiments of the present invention, the guide member 2B is a hollow ring surrounding the outside of the balloon 11, and has an annular hollow channel inside the guide member 2B for blood to flow through when the balloon is expanded.

[0068] Example 2

[0069] Reference Manual Attached Figure 8 , a second preferred embodiment of the balloon catheter provided by the present invention is described. The balloon catheter provided by the second preferred embodiment is substantially the same as the balloon provided by the first embodiment, except for the balloon and the guide member.

[0070] In the second preferred embodiment of the balloon catheter, the catheter body 1 further includes a plurality of support balloons 17, which are respectively mounted on the balloon 11 and are respectively connected to the balloon 11, and the support balloons 17 are located between the balloon 11 and the flow guide 2C. One end of the support balloon 17 is mounted on the balloon 11 and is connected to the balloon 11, and the other end of the support balloon 17 is mounted on the flow guide 2C.

[0071] In the second preferred embodiment, when the balloon 11 is filled with fluid and expanded, the fluid in the balloon 11 can enter the support balloon 17 and expand the support balloon 17. The support balloon 17 pushes the guide member 2C outward, so that the guide member 2C is separated from the balloon 11, and the guide channel 20 is formed between the balloon 11 and the guide member 2C for blood to flow through.

[0072] Preferably, the guide member 2C is annular and made of elastic material. A plurality of support capsules 17 are arranged at intervals around the balloon 11. When the balloon 11 is filled with fluid, the plurality of support capsules 17 can expand simultaneously and stretch the annular guide member 2C outward.

[0073] 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: The catheter body comprises a balloon, an outer tube, an inner tube and a tail seat, wherein the inner tube and the outer tube are respectively installed between the balloon and the tail seat; A flow guide member, the flow guide member is mounted on the outer surface of the balloon of the catheter body, the flow guide member has 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; There are multiple flow guides, which are arranged in sequence along the length extension direction of the balloon; and the flow guide is annular, surrounds the balloon, and has multiple flow guide channels. The annular flow guide member comprises an inner ring, an outer ring and a plurality of circular tubes located between the inner ring and the outer ring, and the circular tubes surround and form the flow guide channel.

2. The balloon catheter according to claim 1, characterized in that: The plurality of flow guides are evenly arranged along the length extension direction of the balloon.

3. The balloon catheter according to claim 1, characterized in that: The plurality of circular tubes are evenly distributed or unevenly distributed.

4. The balloon catheter according to claim 1, characterized in that: The inner ring and the outer ring are respectively fixedly mounted on the circular tube so that the relative positions of the inner ring and the outer ring are fixed.

5. The balloon catheter according to claim 4, characterized in that: The inner ring is fixedly mounted on the circular tube by welding or gluing; and / or the outer ring is fixedly mounted on the circular tube by welding or gluing; and / or the inner ring is fixedly mounted on the outer surface of the balloon by welding or gluing.

6. The balloon catheter according to any one of claims 1 to 5, characterized in that: The inner ring and the outer ring are both made of elastic material.

7. The balloon catheter according to any one of claims 1 to 5, characterized in that: The catheter body also includes a tip, one end of the inner tube is mounted on the tail seat, and the other end is mounted on the tip; and one end of the balloon is mounted on the tip, and the other end is mounted on an end of the outer tube away from the tail seat, and the end of the outer tube away from the balloon is mounted on the tail seat.

8. The balloon catheter according to any one of claims 1 to 5, characterized in that: The tailstock is a three-way tailstock, including a fluid channel and a working channel; the outer tube and the inner tube are respectively hollow pipes, and the outer tube surrounds the outside of the inner tube; the hollow inner tube forms the working channel for the guide wire to pass through; the fluid channel is formed between the outer wall of the inner tube and the inner wall of the outer tube for the fluid to enter the balloon.

9. The balloon catheter according to any one of claims 1 to 5, characterized in that: The catheter body further comprises a developing ring, which is pressed and gripped on the inner tube of the catheter body and is used to mark the position of the balloon.

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