Quick release suction catheter

Abstract

This invention belongs to the field of medical device technology, specifically relating to a rapid-release aspiration catheter. The aspiration catheter includes: a main body with a balloon mounted on it, the balloon surrounding the main body; a supporting catheter section connected to the distal end of the main body, the diameter of which is smaller than that of the main body; and an expansion ring connected to the distal end of the supporting catheter section, one side of which is connected to one side of the expansion ring. In this aspiration catheter, by providing an integrally connected supporting catheter section at the distal end of the main body, the smaller-diameter supporting catheter section has better passability, facilitating direct access to lesions with thinner blood vessels. Furthermore, it allows the supporting catheter section to be delivered synchronously with the main body of the aspiration catheter, requiring only one delivery of the aspiration catheter with the supporting catheter section, reducing surgical steps, significantly lowering surgical difficulty, and improving surgical efficiency.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a rapid-release aspiration catheter. Background Technology

[0002] In the treatment of acute ischemic stroke, when a cerebral blood vessel is blocked by a thrombus, an aspiration catheter is often used in conjunction with a thrombectomy stent to remove the thrombus that caused the blockage, so that the blood supply to the brain tissue can be restored as soon as possible, reducing the extent and severity of the cerebral infarction.

[0003] Because cerebral blood vessels are relatively small in diameter, large-diameter aspiration catheters cannot directly reach these smaller vessels. In existing aspiration device deployment procedures, a guidewire is first used to advance the larger-diameter aspiration catheter proximal to the occlusion. Due to the larger diameter of the aspiration catheter, its passage is insufficient during distal advancement. At this point, a support catheter is advanced inside the aspiration catheter, followed by a smaller-diameter support catheter to assist in its placement. Because the support catheter's diameter is smaller than the aspiration catheter and its distal end is more flexible, it can be inserted into even smaller vessels without a microguidewire or microcatheter. After the support catheter is in place, the microcatheter is then advanced distally for stent placement. In this existing surgical procedure, the two-step placement of the support and aspiration catheters increases the surgeon's workload, prolongs the operation, significantly increases the difficulty, and reduces efficiency.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid-release aspiration catheter to at least solve the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A rapid-release aspiration catheter, the aspiration catheter comprising:

[0008] A main body, on which a balloon is provided, the balloon being fitted around the periphery of the main body;

[0009] A supporting conduit portion is connected to the distal end of the main body portion, and the diameter of the supporting conduit portion is smaller than the diameter of the main body portion;

[0010] An expansion ring is connected to the distal end of the support catheter portion and is used to radially expand the expansion ring after the aspiration catheter is delivered into place, so that the expansion ring is tightly fixed against the blood vessel wall; one side of the support catheter portion is connected to one side of the expansion ring.

[0011] Preferably, in the rapid-release aspiration catheter described above, the front end of the main body is provided with a transition section, which is a tapered structure.

[0012] In the rapid-release aspiration catheter described above, preferably, the diameter of the transition section gradually decreases from the proximal end to the distal end, and the distal end of the transition section is connected to the supporting catheter portion.

[0013] Preferably, in the rapid-release aspiration catheter described above, the supporting catheter portion is eccentrically disposed relative to the main body portion, and one side of the supporting catheter portion and one side of the main body portion are aligned in a straight line.

[0014] Preferably, in the rapid-release aspiration catheter described above, the central axis of the main body and the central axis of the supporting catheter are aligned.

[0015] Preferably, in the rapid-release aspiration catheter described above, a first channel is provided in the wall of the main body, and a connecting hole is provided in the wall inside the balloon, the connecting hole being used to connect the balloon and the first channel.

[0016] Preferably, in the rapid-release aspiration catheter described above, a second channel is provided in the wall of the supporting catheter portion, and the second channel is in communication with the first channel.

[0017] Preferably, in the rapid-release aspiration catheter described above, the expansion ring is provided with a third channel, which is interconnected with the second channel.

[0018] Beneficial effects:

[0019] In this aspiration catheter, a support catheter section with an integral connecting structure is set at the distal end of the main body of the aspiration catheter. The diameter of the support catheter section is smaller than that of the main body, which makes the smaller diameter support catheter section more permeable and facilitates the support catheter section to reach the lesion with thinner blood vessels. Moreover, the support catheter section can be delivered synchronously with the main body of the aspiration catheter. Only one delivery of the aspiration catheter with the support catheter section is required, which reduces the number of surgical steps, greatly reduces the difficulty of the operation, and improves the efficiency of the operation.

[0020] The side of the supporting catheter and the main body of the aspiration catheter that are collinear with each other is attached to the blood vessel wall, and deformation of the supporting catheter is avoided. The entire aspiration catheter will not generate internal stress, so the aspiration catheter has a relatively stable state during use.

[0021] The contrast agent enters the third channel inside the expansion ring through the first and second channels in sequence, causing the expansion ring to expand and adhere tightly to the inner wall of the blood vessel, thereby fixing the distal end of the supporting catheter. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0023] Figure 1 This is a schematic diagram of the suction catheter structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the suction catheter structure according to another embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of a suction catheter according to an embodiment of the present invention.

[0026] In the diagram: 1. Main body; 2. Balloon; 3. Transition section; 4. Support catheter section; 5. Inflation ring; 6. First channel; 7. Connecting hole; 8. Second channel; 9. Third channel. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0030] According to specific embodiments of the present invention, such as Figure 1-3 As shown, the present invention provides a rapid-release aspiration catheter, the aspiration catheter comprising:

[0031] The main body 1 has a balloon 2 installed on it, which is fitted around the periphery of the main body 1.

[0032] The supporting conduit part 4 is connected to the distal end of the main body part 1, and the diameter of the supporting conduit part 4 is smaller than the diameter of the main body part 1.

[0033] The expansion ring 5 is connected to the distal end of the support catheter section 4. After the aspiration catheter is delivered into place, the expansion ring 5 expands radially, so that the expansion ring 5 is fixed tightly against the blood vessel wall. One side of the support catheter section 4 is connected to one side of the expansion ring 5.

[0034] In this aspiration catheter, a support catheter part 4 with an integral connection structure is provided at the distal end of the main body 1 of the aspiration catheter. The diameter of the support catheter part 4 is smaller than that of the main body 1, which makes the smaller diameter support catheter part 4 have better passability and facilitates the support catheter part 4 to reach the lesion with thinner blood vessels. Moreover, the support catheter part 4 can be delivered synchronously with the main body 1 of the aspiration catheter. Only one delivery of the aspiration catheter with the support catheter part 4 is required, which reduces the number of surgical steps, greatly reduces the difficulty of the operation, and improves the efficiency of the operation.

[0035] The front end of the main body 1 is provided with a transition section 3, which is a tapered structure.

[0036] The diameter of the transition section 3 gradually decreases from the proximal end to the distal end, and the distal end of the transition section 3 is connected to the supporting catheter section 4. In one embodiment of this application, by providing the transition section 3 between the main body section 1 and the supporting catheter section 4, the main body section 1 can be more smoothly connected to the supporting catheter section 4, thereby increasing the smoothness of the aspiration catheter and improving its ability to pass through blood vessels.

[0037] The supporting conduit part 4 is eccentrically positioned relative to the main body part 1, and one side of the supporting conduit part 4 is aligned with one side of the main body part 1.

[0038] In one embodiment of this application, the following configuration allows the aspiration catheter to be delivered into place and the expansion ring 5 to expand and fix in the blood vessel. The side of the supporting catheter part 4 and the aspiration catheter body part 1 that are collinear with each other is attached to the blood vessel wall, and the supporting catheter part 4 is prevented from deforming. The entire aspiration catheter will not generate internal stress, thus making the aspiration catheter have a relatively stable state during use.

[0039] The central axis of the main body 1 and the central axis of the supporting catheter 4 are on the same straight line. In another embodiment of this application, the supporting catheter 4 and the main body 1 are concentrically arranged, so that the aspiration catheter has a centrally symmetrical structure, which is easier to manufacture; however, after the aspiration catheter is delivered into place and the expansion ring 5 expands and is fixed in the blood vessel, the supporting catheter 4 will undergo partial deformation.

[0040] A first channel 6 is provided in the wall of the main body 1, and a connecting hole 7 is provided in the wall of the balloon 2, which is used to connect the balloon 2 and the first channel 6. In one embodiment of this application, by delivering contrast agent into the first channel 6, the contrast agent is delivered into the balloon 2 through the connecting hole 7, causing the balloon 2 to inflate and expand to fit tightly against the blood vessel wall, thereby fixing the main body 1 of the aspiration catheter.

[0041] A second channel 8 is provided in the wall of the supporting catheter section 4, and the second channel 8 is interconnected with the first channel 6. In one embodiment of this application, the contrast agent can be delivered to the second channel 8 through the first channel 6.

[0042] The expansion ring 5 is provided with a third channel 9, which is interconnected with the second channel 8. In one embodiment of this application, the expansion ring 5 is hollow, and the cavity inside the expansion ring 5 forms the third channel 9. The contrast agent enters the third channel 9 inside the expansion ring 5 through the first channel 6 and the second channel 8 in sequence, causing the expansion ring 5 to expand and adhere tightly to the inner wall of the blood vessel, thereby fixing the distal end of the support catheter 4.

[0043] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A rapid release suction catheter, comprising: The aspiration catheter includes: A main body, on which a balloon is provided, the balloon being fitted around the periphery of the main body; A supporting conduit portion is connected to the distal end of the main body portion, and the diameter of the supporting conduit portion is smaller than the diameter of the main body portion; An expansion ring is connected to the distal end of the supporting catheter portion. After the aspiration catheter is in place, the expansion ring expands radially, securing it tightly against the blood vessel wall. One side of the supporting catheter portion is connected to one side of the expansion ring. A transition section is provided at the front end of the main body portion. This transition section has a tapered structure, and its diameter gradually decreases from proximal to distal. The distal end of the transition section is connected to the supporting catheter portion. The supporting catheter portion is eccentrically positioned relative to the main body portion, and one side of the supporting catheter portion is aligned with one side of the main body portion. A first channel is provided in the tube wall of the main body, and a connecting hole is provided in the tube wall inside the balloon, the connecting hole being used to connect the balloon and the first channel; A second channel is provided in the wall of the supporting conduit, and the second channel is interconnected with the first channel. The expansion ring is provided with a third channel, which is interconnected with the second channel.

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