A balloon occlusion device

Abstract

The application discloses a balloon blocking device, which comprises a flexible member, a steering member and a blunt head connected in sequence, and a first inflatable member; the inside of the flexible member is formed with a first channel and a second channel extending along the axis of the flexible member; the steering member comprises at least one eccentrically arranged inflation cavity, which is inflated when injected with gas or liquid through the first channel to make the steering member bend towards a direction; the first inflatable member can be inflated and is sleeved outside any one of the distal end of the flexible member, the steering member and the blunt head, and is inflated when injected with gas or liquid through the second channel to block the blood flow of the vessel. When the operator pushes the proximal end of the flexible member to make the distal end of the flexible member approach the bifurcation in the vessel, the steering member is operated step by step to rotate and bend to a suitable angle, so that the distal end of the flexible member can be easily put into the specified vessel, and the operation difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of balloon catheters, and more specifically to a balloon occlusion device. Background Technology

[0002] When creating an animal model of visceral ischemia, the blood vessels need to be exposed on the animal's body surface. Then, under the guidance of a digital subtraction angiography (DSA) machine, a balloon catheter is gradually inserted from the blood vessels on the body surface into the designated position inside the body.

[0003] The animals used are usually rats or rabbits, whose blood vessels have a small diameter. It is difficult to manipulate the proximal end of the balloon catheter to steer the distal end in the desired direction, making it difficult for the balloon catheter to move along the small-diameter, tortuous blood vessels. This places higher demands on the maneuverability of existing balloon catheters. Summary of the Invention

[0004] The purpose of this invention is to provide a balloon occlusion device to improve the maneuverability of balloon catheters.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A balloon occlusion device includes: a flexible element, a steering element, a blunt tip, and a first inflatable element; the flexible element, the steering element, and the blunt tip are all strip-shaped with a circular cross-section, and the distal end of the flexible element, the steering element, and the blunt tip are sequentially connected; the flexible element has a length and diameter that can be pushed or pulled in a blood vessel, and the interior of the flexible element forms a first channel and a second channel extending along the axis of the flexible element; the steering element includes at least one eccentrically arranged expansion cavity, which expands when gas or liquid is injected through the first channel to cause the steering element to bend in one direction; the first inflatable element is inflatable and fitted outside the distal end of the flexible element, the steering element, and the blunt tip, and expands when gas or liquid is injected through the second channel to block blood flow in the blood vessel.

[0006] Furthermore, the balloon occlusion device has a third channel extending along the axis of the flexible member and sequentially penetrating the flexible member, the steering member, and the blunt tip. The third channel contains a guidewire that can be pushed or pulled within the third channel.

[0007] Furthermore, a gripping member is connected to the proximal end of the flexible member, the gripping member including three connectors, the three connectors being respectively connected to the first channel, the second channel and the third channel.

[0008] Furthermore, the distal end of the flexible element is connected to at least one opaque label, which is asymmetrical with respect to the axis of the flexible element.

[0009] Furthermore, the label is a strip shape that extends spirally along the axis of the flexible element.

[0010] Furthermore, a second expandable component is disposed inside the expansion cavity. The outer wall of the second expandable component and the inner wall of the expansion cavity are connected by an elastic element. When the expansion cavity expands, the second expandable component expands accordingly under the traction of the elastic element, and the increased volume of the second expandable component is less than the increased volume of the expansion cavity. The steering component includes at least one contraction cavity corresponding to the expansion cavity. The expansion cavity and the contraction cavity are respectively located on both sides of the axis of the steering component. The contraction cavity is in communication with the interior of the second expandable component and stores gas or liquid. When the second expandable component expands, the gas or liquid stored in the contraction cavity moves toward the interior of the second expandable component, so that the contraction cavity contracts inward.

[0011] Furthermore, the second expandable member and the distal end of the contraction cavity are connected by an annular fourth channel, and the proximal end of the expansion cavity is connected to the first channel.

[0012] Furthermore, the expansion cavity and the contraction cavity are filled with iodine contrast agent.

[0013] Furthermore, the expansion cavity and the contraction cavity are cavities with an arc-shaped elongated oval cross-section, and the cross-section of the cavity is perpendicular to the axis of the steering component.

[0014] Furthermore, the steering component includes one expansion cavity and two contraction cavities, which are evenly distributed around the axis of the steering component.

[0015] Compared with the prior art, this application has the following advantages: A balloon occlusion device is provided in which the operator pushes the proximal end of the flexible element so that the distal end of the flexible element approaches the bifurcation in the blood vessel, rotates the proximal end of the flexible element so that the steering element rotates to a suitable angle, and then injects liquid into the first channel through a syringe so that the steering element bends to a suitable angle. Then, the operator continues to push the proximal end of the flexible element so that the distal end of the flexible element enters the designated blood vessel. In this way, the balloon can be easily pushed into the designated blood vessel, reducing the difficulty of operation. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 This is a perspective view of an embodiment of the present invention, and an enlarged view of its partial structure; Figure 2 This is a side view of an embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 This is a perspective view of the steering component and the blunt end according to an embodiment of the present invention. The steering component is shown in perspective. Figure 5 This is a side view of the steering component and blunt end according to an embodiment of the present invention; Figure 6 for Figure 5 A cross-sectional view along the BB direction; Figure 7 for Figure 5 A cross-sectional view along the CC direction; The labels in the diagram represent the following: 1-Flexible element; 11-First channel; 12-Second channel; 13-Third channel; 14-Guide wire; 15-Holding element; 16-Connector; 17-Label; 2-Directional element; 21-Expansion cavity; 22-Second expandable element; 23-Elastic element; 24-Contraction cavity; 25-Fourth channel; 3-Blunt tip; 4-First expandable element. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It is difficult to manipulate the proximal end of a balloon catheter to steer its distal end in the desired direction. To address this issue, a balloon occlusion device is provided below, which incorporates a structure that allows for steer of the distal end by manipulating the proximal end.

[0020] Please refer to Figure 1 , 2 3. The balloon occlusion device includes: a flexible element 1, a steering element 2, a blunt tip 3, and a first inflatable element 4; Flexible component 1, steering component 2, and blunt end 3 are all strip-shaped with a circular cross-section. The far end of flexible component 1, steering component 2, and blunt end 3 are connected in sequence. The flexible member 1 has a length and diameter that can be pushed or pulled in the blood vessel, and the interior of the flexible member 1 has a first channel 11 and a second channel 12 extending along the axis of the flexible member 1; The steering component 2 includes at least one eccentrically arranged expansion cavity 21, which expands when gas or liquid is injected through the first channel 11 so that the steering component 2 bends in one direction; The first expandable member 4 is capable of expanding and fitting outside any one of the distal end of the flexible member 1, the steering member 2, and the blunt end 3. When gas or liquid is injected through the second channel 12, the first expandable member 4 expands to block blood flow in the blood vessels.

[0021] The operator pushes the proximal end of the flexible member 1 so that the distal end of the flexible member 1 approaches the bifurcation in the blood vessel, rotates the proximal end of the flexible member 1 so that the steering member 2 rotates to a suitable angle, and then injects liquid into the first channel 11 through the syringe so that the steering member 2 bends to a suitable angle. Then, the operator continues to push the proximal end of the flexible member 1 so that the distal end of the flexible member 1 enters the designated blood vessel.

[0022] Optional: The first inflatable component 4 is a balloon, and the material of the balloon is selected from the group consisting of elastomers and thermoplastic polymers.

[0023] The flexible component 1, the steering component 2, and the blunt head 3 are all made of elastomers, which are selected from silicone rubber, latex rubber, natural rubber, butadiene-based copolymers, EPDM, polyvinyl chloride, styrene-ethylene, butene-styrene copolymers, and combinations thereof.

[0024] The steering component 2 is configured to be able to bend up to 180° relative to the longitudinal axis of the flexible component 1.

[0025] The surfaces of the flexible component 1, the steering component 2, the blunt end 3, and the first expandable component 4 are covered with a hydrophilic super-slippery coating.

[0026] An X-ray imaging line is provided on the outer side of the flexible component 1.

[0027] The diameter of the distal end of the blunt tip 3 is smaller than the diameter of the proximal end of the blunt tip 3, and the distal end of the blunt tip 3 is shaped like a table tennis table.

[0028] The spiral strip-shaped label 17, as observed by a digital subtraction angiography (DSA) machine, has obvious directionality, and the shape is different when viewed from the front and back, so its angle is easy to identify.

[0029] Furthermore, the first inflatable component 4 can be an airbag, but the inflation direction of the airbag is difficult to control. As the volume of the airbag gradually increases, its inflation direction becomes increasingly unpredictable. After the steering component 2 bends to a certain angle, its bending direction may be different from the direction predicted by the operator, which brings difficulties to the operation.

[0030] Furthermore, in order to improve the operability of the balloon occlusion device and reduce its operational difficulty, an optional technical means is provided below.

[0031] Please refer to Figure 1 , 2 3. The balloon blocking device has a third channel 13 that extends along the axis of the flexible member 1 and passes through the flexible member 1, the deflecting member 2 and the blunt head 3 in sequence. The third channel 13 contains a guide wire 14, which can be pushed or pulled in the third channel 13.

[0032] After the operator rotates and bends the steering component 2 to a suitable angle, the operator first pushes the guide wire 14 to enter the designated blood vessel, then removes the liquid inside the first channel 11, causing the steering component 2 to bend naturally with the guide wire 14, and finally pushes the proximal end of the flexible component 1, causing the blunt tip 3 to follow the guide wire 14 into the designated blood vessel.

[0033] A sealing ring or a one-way valve can be installed at the proximal end of the flexible member 1 or the distal end of the blunt head 3 to prevent blood from overflowing through the third channel 13.

[0034] Since the diameter of guidewire 14 is smaller than that of blunt tip 3, guiding the movement of the balloon occlusion device through guidewire 14 can significantly reduce the difficulty of operation.

[0035] The flexible member 1 is connected to a gripper 15 at its proximal end. The gripper 15 includes three connectors 16, which are respectively connected to the first channel 11, the second channel 12 and the third channel 13.

[0036] Furthermore, to facilitate observation of the rotation angle of the steering component 2, at least one opaque label 17 is connected to the distal end of the flexible component 1, and the label 17 is asymmetrical with respect to the axis of the flexible component 1.

[0037] The operator observes the shape of the tag 17 using a digital subtraction angiography (DSA) machine to determine the rotation angle of the steering component 2.

[0038] Optionally, label 17 is a strip shape that extends spirally along the axis of flexible member 1.

[0039] To improve the consistency of the bending direction of the steering component 2, an optional technical means is provided below.

[0040] Please refer to Figure 3 , 4 6. The expansion cavity 21 is provided with a second expandable member 22. The outer wall of the second expandable member 22 and the inner wall of the expansion cavity 21 are connected by an elastic member 23. When the expansion cavity 21 expands, the second expandable member 22 expands accordingly under the traction of the elastic member 23, and the increased volume of the second expandable member 22 is less than the increased volume of the expansion cavity 21. The steering component 2 includes at least one contraction cavity 24 corresponding to the expansion cavity 21. The expansion cavity 21 and the contraction cavity 24 are located on both sides of the axis of the steering component 2. The contraction cavity 24 is in communication with the interior of the second expandable component 22 and stores gas or liquid. When the second expandable component 22 expands, the gas or liquid stored in the contraction cavity 24 moves toward the interior of the second expandable component 22, so that the contraction cavity 24 contracts inward.

[0041] The second expandable member 22 is an elastic bag-shaped object, and the elastic member 23 is an elastic strip-shaped object. The elastic member 23 occupies only part of the interlayer gap between the expansion cavity 21 and the second expandable member 22. When the expansion cavity 21 expands outward uniformly, the second expandable member 22 only expands outward at the part pulled by the elastic member 23. Therefore, the increased volume of the second expandable member 22 is less than the increased volume of the expansion cavity 21.

[0042] When one side of the steering component 2 expands while the other side contracts, the steering component 2 will inevitably bend toward the side that is contracting.

[0043] Optional, please refer to Figure 3 , 4 5, 6, 7. In the above embodiments, the steering component 2 includes one expansion cavity 21 and two contraction cavities 24, which are evenly distributed around the axis of the steering component 2.

[0044] When the expansion chamber 21 expands, the steering component 2 bends toward the middle part of the two contraction chambers 24.

[0045] Optional: The expansion cavity 21 and the contraction cavity 24 are cavities formed between the inner wall of the third channel 13 and the outer wall of the steering component 2. The cross-section of the cavity is an arc-shaped elongated circle, and the cross-section of the cavity is perpendicular to the axis of the steering component 2.

[0046] The expansion chamber 21 and the contraction chamber 24 are filled with iodine contrast agent, which can be clearly seen under the angiography machine (DSA), making it easy for the operator to observe the position and bending angle of the steering component 2.

[0047] The distal ends of the second expandable member 22 and the contraction cavity 24 are connected by an annular fourth channel 25, and the proximal end of the expansion cavity 21 is connected to the first channel 11.

[0048] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A balloon occlusion device, characterized in that, include: Flexible component (1), steering component (2), blunt end (3) and first expandable component (4); The flexible member (1), the steering member (2) and the blunt end (3) are all strip-shaped and have a circular cross-section. The far end of the flexible member (1), the steering member (2) and the blunt end (3) are connected in sequence. The flexible member (1) has a length and diameter that can be pushed or pulled in the blood vessels, and the interior of the flexible member (1) has a first channel (11) and a second channel (12) extending along the axis of the flexible member (1). The steering component (2) includes at least one eccentrically arranged expansion cavity (21), which expands when gas or liquid is injected through the first channel (11) so that the steering component (2) bends in one direction; The first expandable member (4) is expandable and fitted outside the distal end of the flexible member (1), the steering member (2) and the blunt head (3), and the first expandable member (4) expands to block blood flow in the blood vessels when gas or liquid is injected through the second channel (12); The expansion cavity (21) is provided with a second expandable member (22). The outer wall of the second expandable member (22) and the inner wall of the expansion cavity (21) are connected by an elastic member (23). When the expansion cavity (21) expands, the second expandable member (22) expands accordingly under the traction of the elastic member (23), and the increased volume of the second expandable member (22) is less than the increased volume of the expansion cavity (21). The steering component (2) includes at least one contraction cavity (24) corresponding to the expansion cavity (21). The expansion cavity (21) and the contraction cavity (24) are located on both sides of the axis of the steering component (2). The contraction cavity (24) is connected to the interior of the second expandable component (22) and stores gas or liquid. When the second expandable component (22) expands, the gas or liquid stored in the contraction cavity (24) moves toward the interior of the second expandable component (22) so that the contraction cavity (24) contracts inward.

2. The balloon occlusion device according to claim 1, characterized in that, The balloon occlusion device has a third channel (13) extending along the axis of the flexible member (1) and passing through the flexible member (1), the steering member (2) and the blunt head (3) in sequence. The third channel (13) contains a guide wire (14) that can be pushed or pulled in the third channel (13).

3. The balloon occlusion device according to claim 2, characterized in that, The flexible member (1) is connected to a gripper (15) at its proximal end. The gripper (15) includes three connectors (16), which are respectively connected to the first channel (11), the second channel (12) and the third channel (13).

4. The balloon occlusion device according to claim 1, characterized in that, The flexible element (1) has at least one opaque label (17) attached to its distal end, the label (17) being asymmetrical with respect to the axis of the flexible element (1).

5. The balloon occlusion device according to claim 4, characterized in that, The label (17) is a strip shape that extends spirally along the axis of the flexible element (1).

6. The balloon occlusion device according to claim 1, characterized in that, The distal ends of the second expandable member (22) and the contraction cavity (24) are connected by an annular fourth channel (25), and the proximal end of the expansion cavity (21) is connected to the first channel (11).

7. The balloon occlusion device according to claim 1, characterized in that, The expansion chamber (21) and the contraction chamber (24) are filled with iodine contrast agent.

8. The balloon occlusion device according to claim 1, characterized in that, The expansion cavity (21) and the contraction cavity (24) are cavities with an arc-shaped elongated oval cross section, and the cross section of the cavity is perpendicular to the axis of the steering component (2).

9. A balloon occlusion device according to claim 1, characterized in that, The steering component (2) includes one expansion cavity (21) and two contraction cavities (24), which are evenly distributed around the axis of the steering component (2).

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