Perfusion balloon and balloon dilatation catheter

Abstract

The invention discloses a perfusion balloon and a balloon dilatation catheter, and relates to the technical field of medical instruments. The perfusion balloon comprises a fillable body and at least one hollow component, a concave part and a convex part which are connected with each other at least in a full state are formed on the peripheral wall of the fillable body; the at least one hollow assembly is arranged on the peripheral wall of the fillable body and extends in the length direction of the fillable body, and the hollow assembly and the sunken part jointly form a blood flow channel allowing blood to pass through. The structure of the perfusion balloon is improved, a blood flow channel is formed between the periphery of the perfusion balloon and the blood vessel wall, fluid in the blood vessel is allowed to flow when the balloon expands, longer balloon expansion time is allowed, and the risks of ischemia and tissue damage are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an infusion balloon and a balloon dilatation catheter. Background Art

[0002] Cardiovascular diseases are one of the main diseases threatening human health. Percutaneous Coronary Intervention (PCI) is one of the treatment methods for coronary heart disease.

[0003] A balloon dilatation catheter is a commonly used instrument in PCI surgery. However, the traditional balloon dilatation catheter will block blood flow during dilation. The balloon can only be inflated for a very short inflation time because long-term occlusion of the coronary artery may cause damage to part of the heart. To solve the above problems, an infusion balloon catheter has been introduced on the market. When the balloon of the infusion balloon catheter is in an inflated state, it provides a path for blood to flow through the balloon, thereby allowing the balloon inflation time to be extended.

[0004] However, the existing infusion balloon catheter forms a plurality of balloon cavities in the balloon, and the gap surrounded by the plurality of balloon cavities is a blood flow channel. As the balloon continues to be filled and expands, it continuously squeezes the blood vessel wall. The time for the blood flow channel to be established and maintained is not long enough, and the volume of the blood flow channel is continuously compressed or even completely blocked, still posing a risk of ischemia and tissue damage. Summary of the Invention

[0005] The main purpose of the present invention is to provide an infusion balloon and a balloon dilatation catheter, aiming to enable the infusion balloon to establish a more persistent blood flow channel when filled, improve the stability of the blood flow channel, extend the dilation time of the infusion balloon, and further reduce the risk of ischemia and tissue damage.

[0006] To achieve the above object, the present invention provides an infusion balloon, comprising: An inflatable body, on the outer peripheral wall of which there are formed recessed portions and protruding portions that are connected to each other at least when in a filled state; and At least one hollowing-out component, provided on the outer peripheral wall of the inflatable body and extending along the length direction of the inflatable body, the hollowing-out component and the recessed portion jointly forming a blood flow channel allowing blood to pass through.

[0007] Optionally, the hollowing-out component includes a fixed seat, a first support rod, and a second support rod. A fixed seat is provided on each of two adjacent protruding portions. One end of the first support rod is hinged to one of the fixed seats, the other end of the first support rod is rotatably connected to one end of the second support rod, and the other end of the second support rod is hinged to the other fixed seat. The first support rod and the second support rod are both provided with communication holes communicating with the recessed portion.

[0008] Optionally, the first support rod and the second support rod form a movable support point at the connection. When the inflatable body is in the inflated state, the movable support point moves to a position higher than the protruding portion to be adapted to abut against the blood vessel wall.

[0009] Optionally, when the inflatable body is in the contracted state, the first support rod and the second support rod are flush with each other.

[0010] Optionally, a plurality of crests and troughs are formed on the outer peripheral wall of the inflatable body. The troughs are the recessed portions, and the crests are the protruding portions. The hollowing-out assemblies are arranged in a one-to-one correspondence with the troughs.

[0011] Optionally, the fixing seats are all installed at the crests.

[0012] Optionally, the movable support point is arranged opposite to the trough.

[0013] To achieve the above object, the present invention further provides a balloon dilation catheter, which includes a catheter and the above-mentioned perfusion balloon connected to the distal end of the catheter. The perfusion balloon includes: An inflatable body, on the outer peripheral wall of which there are formed recessed portions and protruding portions that are connected to each other at least when in the inflated state; and At least one hollowing-out assembly, which is arranged on the outer peripheral wall of the inflatable body and extends along the length direction of the inflatable body. The hollowing-out assembly and the recessed portion together form a blood flow channel allowing blood to pass through.

[0014] Optionally, the catheter is at least formed with an inflation channel and a guide wire lumen. The inflation channel is communicated with the inner cavity of the inflatable body, and the guide wire lumen is used for a guide wire to extend therein.

[0015] Optionally, the balloon dilation catheter further includes a catheter seat installed at the proximal end of the catheter. The catheter seat is provided with an inflation port communicated with the inflation channel and a guide wire port communicated with the guide wire lumen.

[0016] In the technical solution of the present invention, the perfusion balloon includes an inflatable body and at least one hollowed-out component; on the outer peripheral wall of the inflatable body, there are formed recessed portions and protruding portions that are connected to each other and at least presented in the inflated state; at least one hollowed-out component is arranged on the outer peripheral wall of the inflatable body and extends along the length direction of the inflatable body, and the hollowed-out component and the recessed portion together form a blood flow channel that allows blood to pass through. It can be understood that the present invention improves the structure of the perfusion balloon. A hollowed-out component is arranged between the outer periphery of the perfusion balloon and the blood vessel wall, and the hollowed-out component and the recessed portion together form a blood flow channel, which greatly improves the stability of the blood flow channel, enables the perfusion balloon to establish a more lasting blood flow channel when inflated, effectively extends the dilation time of the perfusion balloon, and further reduces the risk of ischemia and tissue damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0018] Figure 1 Structural schematic diagram of an embodiment of the perfusion balloon of the present invention; Figure 2 Front view of an embodiment of the perfusion balloon of the present invention; Figure 3 Side view of an embodiment of the perfusion balloon of the present invention; Figure 4 For Figure 3 Cross-sectional view taken along line A-A in Figure 5 For Figure 4 Enlarged view of B in

[0019] Explanation of the reference numerals in the drawings: 10, inflatable body; 20, hollowed-out component; 101, recessed portion; 102, protruding portion; 21, fixed seat; 22, first support rod; 23, second support rod; 211, blood flow channel; 20a, communication hole; 201, movable support point.

[0020] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly defined 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. The meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. The technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The present invention provides an infusion balloon.

[0026] Referring to Figures 1 to 5 , in an embodiment of the present invention, the infusion balloon includes an inflatable body 10 and at least one hollow-out component 20; at least one concave portion 101 and convex portion 102 that are connected to each other and at least presented in the inflated state are formed on the outer peripheral wall of the inflatable body 10; at least one hollow-out component 20 is disposed on the outer peripheral wall of the inflatable body 10 and extends along the length direction of the inflatable body 10, and the hollow-out component 20 and the concave portion 101 together form a blood flow channel 211 that allows blood to pass through.

[0027] In this embodiment, the inflatable body 10 is generally approximately in an "S" shape as a whole after inflation, but this is not limited here. It should be noted that the existing balloon manufacturing process can make it into an "S" shape or other shapes with a concave portion 101 and a convex portion 102.

[0028] The hollowing-out component 20 can be a hollow structure made of a flexible material or a movable hollow structure composed of a rigid material, and this is not limited here.

[0029] It should be noted that in this embodiment, the inflatable body 10 has a contracted state and an inflated state, and the hollowing-out component 20 has at least a folded state and an unfolded state corresponding to these two states; when the hollowing-out component 20 is in the folded state, the hollowing-out component 20 is attached to the outer periphery of the inflatable body 10 or is arranged close to the inflatable body 10; when the hollowing-out component 20 is in the unfolded state, the middle part of the hollowing-out component 20 is far away from the inflatable body 10 and forms a blood flow channel 211 with the concave portion 101.

[0030] It can be understood that the present invention improves the structure of the perfusion balloon. A hollowing-out component 20 is arranged between the outer periphery of the perfusion balloon and the blood vessel wall. The hollowing-out component 20 and the concave portion 101 jointly form a blood flow channel 211, which greatly improves the stability of the blood flow channel 211, enables the perfusion balloon to establish a more persistent blood flow channel 211 when inflated, effectively extends the dilation time of the perfusion balloon, and further reduces the risk of ischemia and tissue damage.

[0031] Refer to Figures 1 to 5 , in some embodiments, the hollowing-out component 20 may include a fixed seat 21, a first support rod 22 and a second support rod 23. A fixed seat 21 is provided on each of two adjacent convex portions 102. One end of the first support rod 22 is hinged to one of the fixed seats 21. The other end of the first support rod 22 is rotationally connected to one end of the second support rod 23 through a connecting pin. The other end of the second support rod 23 is hinged to the other fixed seat 21. The first support rod 22 and the second support rod 23 are both provided with communication holes 20a communicating with the concave portion 101. In this way, the establishment of the blood flow channel 211 is realized, and the structure of this hollowing-out component 20 can better change with the morphological change of the inflatable body 10, with good adaptability, which enables the perfusion balloon to establish a more persistent blood flow channel 211 when inflated, and further reduces the risk of ischemia and tissue damage.

[0032] In this embodiment, the first support rod 22 and the second support rod 23 form a movable support point 201 at the connection. When the inflatable body 10 is in the inflated state, the movable support point 201 moves to a position higher than the convex portion 102 to be suitable for abutting against the blood vessel wall. When the inflatable body 10 is in the contracted state, the first support rod 22 and the second support rod 23 are flush.

[0033] To improve the convenience of manufacturing the inflatable body 10 and make the overall shape of the perfusion balloon more stable after inflation to ensure the stability of the treatment process, mainly referring to Figure 5 , in this embodiment, a plurality of crests and troughs are formed on the outer peripheral wall of the inflatable body 10. The troughs are recessed portions 101, and the crests are protruding portions 102. The hollowing-out components 20 are arranged one-to-one with the troughs, and the fixed seats 21 are all installed at the crests. Among them, the movable support points 201 are arranged opposite to the troughs.

[0034] When the perfusion balloon is in a contracted state, the first support rod 22 and the second support rod 23 are on a horizontal line and in the same straight line; when the perfusion balloon expands, since the distance between two adjacent crests becomes shorter, the first support rod 22 and the second support rod 23 are driven to jack up, and an angle is formed between the first support rod 22 and the second support rod 23; both the first support rod 22 and the second support rod 23 are hollow structures in the middle. When the perfusion balloon expands, the hollow parts communicate with the troughs to form a blood flow channel 211 for blood to flow through, and the blood can be supplied to the downstream area of the balloon, thereby preventing partial damage to human tissues caused by long-term occlusion of blood vessels.

[0035] When it is necessary to withdraw the perfusion balloon out of the body, the inflatable body 10 is depressurized and contracted, and the first support rod 22 and the second support rod 23 move towards the direction close to the inflatable body 10 and finally are in a straight line, completing the overall folding and storage of the perfusion balloon, and then it can be withdrawn out of the body.

[0036] In some other embodiments, the hollowing-out component 20 can be composed of a plurality of flexible telescopic rods or strips. The two ends of the flexible telescopic rods or strips are respectively arranged at the crests of the inflatable body 10, and the middle parts of the flexible telescopic rods or strips are hollow. That is to say, the hollowing-out component 20 in this embodiment adopts a flexible telescopic structure, and the flexible telescopic structure can also better adapt to the morphological changes of the inflatable body 10.

[0037] The present invention also provides a balloon dilation catheter, which includes a catheter and a perfusion balloon connected to the distal end of the catheter. The specific structure of the perfusion balloon refers to the above embodiments. Since the balloon dilation catheter provided by the present invention includes all the solutions of all the above embodiments of the perfusion balloon, therefore, it has at least the same technical effects as the above perfusion balloon, and will not be elaborated one by one here.

[0038] In an embodiment of the present invention, the catheter is at least formed with a filling channel and a guide wire lumen. The filling channel is communicated with the inner cavity of the inflatable body 10, and the guide wire lumen is used for the guide wire to extend into.

[0039] For the convenience of connecting external devices to improve the treatment efficiency, in one embodiment, the balloon dilation catheter may further include a catheter hub installed at the proximal end of the catheter. The catheter hub is provided with a filling port communicating with the filling channel and a guide wire port communicating with the guide wire lumen.

[0040] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A perfusion balloon, characterized in that: include: A fillable body, the outer peripheral wall of which is formed with a concave portion and a convex portion connected to each other at least in a filled state; as well as At least one hollow component is arranged on the outer peripheral wall of the fillable body and extends along the length direction of the fillable body. The hollow component and the recessed portion together form a blood flow channel allowing blood to pass through.

2. The perfusion balloon according to claim 1, characterized in that: The hollow component includes a fixed seat, a first support rod and a second support rod, and each of the two adjacent protrusions is provided with a fixed seat, one end of the first support rod is hinged to one of the fixed seats, the other end of the first support rod is rotatably connected to one end of the second support rod, and the other end of the second support rod is hinged to the other fixed seat, and the first support rod and the second support rod are both provided with a connecting hole connected to the recessed portion.

3. The perfusion balloon according to claim 2, characterized in that: The first support rod and the second support rod form a movable support point at the connection. When the fillable body is in a filled state, the movable support point moves to a position higher than the protrusion so as to be suitable for abutting against the blood vessel wall.

4. The perfusion balloon according to claim 3, characterized in that: When the inflatable body is in a contracted state, the first support rod is flush with the second support rod.

5. The perfusion balloon according to claim 3, characterized in that: A plurality of wave crests and wave troughs are formed on the outer peripheral wall of the fillable body, wherein the wave troughs are the recessed portions, and the wave crests are the protruding portions, and the hollow components are arranged one to one with the wave troughs.

6. The perfusion balloon according to claim 5, characterized in that: The fixing seats are all installed at the wave crests.

7. The perfusion balloon according to claim 5, characterized in that: The movable supporting point is arranged opposite to the wave trough.

8. A balloon dilatation catheter, characterized in that: The invention comprises a catheter and a perfusion balloon as claimed in any one of claims 1 to 7 connected to the distal end of the catheter.

9. The balloon dilatation catheter according to claim 8, characterized in that: The catheter is at least formed with a filling channel and a guidewire cavity, wherein the filling channel is communicated with the inner cavity of the fillable body, and the guidewire cavity is used for inserting a guidewire.

10. The balloon dilatation catheter according to claim 9, characterized in that: The balloon dilatation catheter also includes a catheter seat installed at the proximal end of the catheter, and the catheter seat is provided with a filling port communicated with the filling channel and a guidewire port communicated with the guidewire cavity.

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