A perfusion balloon and a balloon dilation catheter

Abstract

The present invention discloses a perfusion balloon and a balloon dilatation catheter, relating to the field of medical device technology. The perfusion balloon comprises a fillable body and at least one hollow component; the outer peripheral wall of the fillable body is formed with a recessed portion and a protruding portion that are connected to each other at least when in a filled state; at least one hollow component is provided on the outer peripheral wall of the fillable body and extends along the length of the fillable body, and the hollow component and the recessed portion together form a blood flow channel that allows blood to pass through. The present invention improves the structure of the perfusion balloon, forming a blood flow channel between the outer periphery of the perfusion balloon and the blood vessel wall, allowing intravascular fluid to flow when the balloon is inflated, allowing for a longer balloon expansion time, and reducing the risk of ischemia and tissue damage.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a perfusion balloon and a balloon dilation catheter. Background Art

[0002] Cardiovascular disease is one of the major diseases that threaten human health, and percutaneous coronary intervention (PCI) is one of the treatments for coronary heart disease.

[0003] Balloon catheters are commonly used in PCI procedures, but traditional balloon catheters block blood flow during expansion. The balloon can only be inflated for a short time, as prolonged coronary artery occlusion can cause partial heart damage. To address this issue, perfusion balloon catheters have been introduced. These catheters provide a path for blood to flow through the balloon while inflated, allowing for a longer inflation time.

[0004] However, existing perfusion balloon catheters form multiple balloon cavities through the balloon, and the gaps in the middle of the multiple balloon cavities serve as blood flow channels. As the balloon continues to be filled, it continues to expand and squeeze the blood vessel wall. The blood flow channel is not established and maintained long enough, and the volume of the blood flow channel is continuously compressed or even completely blocked, which still poses a risk of ischemia and tissue damage. Summary of the Invention

[0005] The main purpose of the present invention is to provide a perfusion balloon and a balloon dilation catheter, which aims to establish a more durable blood flow channel when the perfusion balloon is filled, improve the stability of the blood flow channel, prolong the expansion time of the perfusion balloon, and further reduce the risk of ischemia and tissue damage.

[0006] To achieve the above objectives, the present invention provides a perfusion balloon comprising:

[0007] an inflatable body having an outer peripheral wall formed with a concave portion and a convex portion connected to each other at least in the inflated state; and

[0008] At least one hollow component is provided on the outer peripheral wall of the fillable body and extends along the length direction of the fillable body, and the hollow component and the recessed portion together form a blood flow channel allowing blood to pass through.

[0009] Optionally, the hollow component includes a fixing seat, a first support rod and a second support rod, and each of the two adjacent protrusions is provided with a fixing seat, one end of the first support rod is hinged to one of the fixing 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 fixing seat, and the first support rod and the second support rod are both provided with a connecting hole connected to the recessed portion.

[0010] Optionally, the first support rod and the second support rod form a movable support point at the connection point, and when the fillable body is in a filled state, the movable support point moves to a position higher than the protrusion to be suitable for abutting against the blood vessel wall.

[0011] Optionally, when the inflatable body is in a contracted state, the first support rod is flush with the second support rod.

[0012] Optionally, a plurality of crests and troughs are formed on the outer peripheral wall of the fillable body, the troughs are the recessed portions, the crests are the protruding portions, and the hollow components are arranged one-to-one with the troughs.

[0013] Optionally, the fixing seats are all installed at the wave crests.

[0014] Optionally, the movable support point is arranged opposite to the trough.

[0015] To achieve the above object, the present invention further provides a balloon dilatation catheter, comprising a catheter and the above-mentioned perfusion balloon connected to the distal end of the catheter, wherein the perfusion balloon comprises:

[0016] an inflatable body having an outer peripheral wall formed with a concave portion and a convex portion connected to each other at least in the inflated state; and

[0017] At least one hollow component is provided on the outer peripheral wall of the fillable body and extends along the length direction of the fillable body, and the hollow component and the recessed portion together form a blood flow channel allowing blood to pass through.

[0018] Optionally, the catheter is formed with at least a filling channel and a guidewire cavity, the filling channel is communicated with the inner cavity of the fillable body, and the guidewire cavity is used for inserting a guidewire.

[0019] Optionally, the balloon dilatation catheter further comprises a catheter seat mounted on the proximal end of the catheter, wherein the catheter seat is provided with a filling port communicating with the filling channel and a guidewire port communicating with the guidewire cavity.

[0020] In the technical solution of the present invention, the perfusion balloon includes an inflatable body and at least one hollow component; the outer peripheral wall of the inflatable body is formed with a recessed portion and a protruding portion that are connected to each other at least when in a filled state; at least one hollow component is disposed on the outer peripheral wall of the inflatable body and extends along the length of the inflatable body, and the hollow 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 by disposing a hollow component between the outer periphery of the perfusion balloon and the blood vessel wall, and the hollow component and the recessed portion together form a blood flow channel. This greatly improves the stability of the blood flow channel, enabling the perfusion balloon to establish a more durable blood flow channel when filled, effectively extending the expansion time of the perfusion balloon, and further reducing the risk of ischemia and tissue damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of an embodiment of a perfusion balloon according to the present invention;

[0023] Figure 2 This is a front view of an embodiment of the perfusion balloon of the present invention;

[0024] Figure 3 A side view of an embodiment of a perfusion balloon according to the present invention;

[0025] Figure 4 for Figure 3 Cross-sectional view at AA in the middle;

[0026] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0027] Description of Figure Numbers:

[0028] 10. Fillable body; 20. Hollow component; 101. Recessed portion; 102. Protruding portion; 21. Fixed seat; 22. First support rod; 23. Second support rod; 211. Blood flow channel; 20a. Connecting hole; 201. Movable support point.

[0029] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In addition, the descriptions of "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 number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution in which both A and B are satisfied. The technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present invention provides a perfusion balloon.

[0035] Reference Figures 1 to 5 In one embodiment of the present invention, the perfusion balloon includes a fillable body 10 and at least one hollow component 20; a recessed portion 101 and a protruding portion 102 connected to each other are formed on the outer peripheral wall of the fillable body 10, which are at least in the filled state; at least one hollow component 20 is provided on the outer peripheral wall of the fillable body 10 and extends along the length direction of the fillable body 10, and the hollow component 20 and the recessed portion 101 together form a blood flow channel 211 allowing blood to pass through.

[0036] In this embodiment, the inflatable body 10 is generally in an "S" shape after expansion, which is not limited here. It should be noted that the existing balloon manufacturing process can be used to make it into an "S" shape with a concave portion 101 and a convex portion 102 or other shapes.

[0037] The hollow component 20 can be a hollow structure made of a flexible material or a movable hollow structure made of a rigid material, which is not limited here.

[0038] It should be noted that in this embodiment, the fillable body 10 has a contracted state and a filled state, and the hollow component 20 has at least a folded state and an unfolded state corresponding to these two states; when the hollow component 20 is in the folded state, the hollow component 20 is attached to the outer periphery of the fillable body 10 or is arranged close to the fillable body 10; when the hollow component 20 is in the unfolded state, the middle part of the hollow component 20 is away from the fillable body 10 and forms a blood flow channel 211 with the recessed portion 101.

[0039] It can be understood that the present invention improves the structure of the perfusion balloon, and a hollow component 20 is set between the periphery of the perfusion balloon and the blood vessel wall. The hollow component 20 and the recessed portion 101 together form a blood flow channel 211, which greatly improves the stability of the blood flow channel 211, enabling the perfusion balloon to establish a more lasting blood flow channel 211 when filled, effectively extending the expansion time of the perfusion balloon, and further reducing the risk of ischemia and tissue damage.

[0040] Reference Figures 1 to 5 In some embodiments, the hollow component 20 may include a fixing seat 21, a first support rod 22, and a second support rod 23. Each of the two adjacent protrusions 102 is provided with a fixing seat 21. One end of the first support rod 22 is hinged to one of the fixing seats 21. The other end of the first support rod 22 is rotatably connected to one end of the second support rod 23 via a connecting pin. The other end of the second support rod 23 is hinged to the other fixing seat 21. The first support rod 22 and the second support rod 23 are both provided with a connecting hole 20a that communicates with the recessed portion 101. In this way, a blood flow channel 211 is established. Furthermore, the hollow component 20 structure can better adapt to changes in the shape of the inflatable body 10, providing good adaptability. This enables the perfusion balloon to establish a more durable blood flow channel 211 during inflation, further reducing the risk of ischemia and tissue damage.

[0041] In this embodiment, the first support rod 22 and the second support rod 23 form a movable support point 201 at their connection. When the inflatable body 10 is inflated, the movable support point 201 moves to a position higher than the protrusion 102 to abut against the blood vessel wall. When the inflatable body 10 is in a deflated state, the first support rod 22 and the second support rod 23 are flush.

[0042] In order to improve the convenience of manufacturing the inflatable body 10 and make the overall shape of the perfusion balloon more stable after filling, and ensure the stability of the treatment process, the main reference is Figure 5 In this embodiment, the outer wall of the inflatable body 10 is formed with a plurality of crests and troughs. The troughs are recessed portions 101, and the crests are protruding portions 102. The hollow components 20 are arranged one-to-one with the troughs, and the fixing seats 21 are all installed at the crests. Among them, the movable support points 201 are arranged opposite to the troughs.

[0043] 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 on the same straight line; when the perfusion balloon is inflated, the distance between two adjacent wave peaks becomes shorter, thereby driving the first support rod 22 and the second support rod 23 to push upward, and a certain angle is formed between the first support rod 22 and the second support rod 23; the first support rod 22 and the second support rod 23 are both hollow structures in the middle. When the perfusion balloon is inflated, the hollow part is connected to the wave trough to form a blood flow channel 211 for blood circulation. Blood can be supplied to the downstream area of the balloon, thereby preventing the blood vessels from being blocked for a long time and causing partial damage to human tissue.

[0044] When the perfusion balloon needs to be withdrawn from the body, the inflatable body 10 is depressurized and contracted, and the first support rod 22 and the second support rod 23 move toward the inflatable body 10, and finally in a straight line, the entire perfusion balloon is folded and stored, and then it can be withdrawn from the body.

[0045] In other embodiments, the hollow component 20 may be composed of a plurality of flexible telescopic rods or strips, with the ends of the flexible telescopic rods or strips positioned at the crests of the inflatable body 10, and the middle of the flexible telescopic rods or strips being hollowed out. In other words, the hollow component 20 of this embodiment employs a flexible telescopic structure that can better adapt to changes in the shape of the inflatable body 10.

[0046] The present invention also proposes a balloon dilatation 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-mentioned embodiment. Since the balloon dilatation catheter proposed by the present invention includes all schemes of all embodiments of the above-mentioned perfusion balloon, it has at least the same technical effects as the above-mentioned perfusion balloon, which will not be elaborated here one by one.

[0047] In one embodiment of the present invention, the catheter is formed with at least a filling channel and a guidewire cavity. The filling channel is communicated with the inner cavity of the fillable body 10, and the guidewire cavity is used for inserting a guidewire.

[0048] To facilitate the connection of external devices and improve the efficiency of the operation, in one embodiment, the balloon dilatation catheter may also include a catheter seat installed at the proximal end of the catheter, and the catheter seat is provided with a filling port connected to the filling channel and a guidewire port connected to the guidewire cavity.

[0049] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A perfusion balloon, characterized in that: include: The inflatable body has an outer peripheral wall formed with a concave portion and a convex portion connected to each other at least in the inflated state; as well as At least one hollow component is provided on the outer peripheral wall of the fillable body and extends along the length direction of the fillable body, and the hollow component and the recessed portion jointly form a blood flow channel allowing blood to pass through; the hollow component includes a fixing seat, a first support rod and a second support rod, each of the two adjacent protrusions is provided with a fixing seat. One end of the first support rod is hinged on one of the fixing 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 on the other fixing seat. The first support rod and the second support rod are both provided with a connecting hole connected to the recessed portion; the first support rod and the second support rod form a movable support point at the connection, and 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; when the fillable body is in a contracted state, the first support rod is flush with the second support rod.

2. The perfusion balloon according to claim 1, wherein 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.

3. The perfusion balloon according to claim 2, wherein: The fixing seats are all installed at the wave crests.

4. The perfusion balloon according to claim 3, wherein: The movable supporting point is arranged opposite to the wave trough.

5. A balloon dilatation catheter, characterized in that: The invention comprises a catheter and the perfusion balloon according to any one of claims 1 to 4 connected to the distal end of the catheter.

6. The balloon dilatation catheter according to claim 5, characterized in that: The catheter is formed with at least 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.

7. The balloon dilatation catheter according to claim 6, characterized in that: The balloon dilatation catheter further comprises a catheter seat mounted on the proximal end of the catheter, wherein the catheter seat is provided with a filling port communicating with the filling channel and a guidewire port communicating with the guidewire cavity.

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