Sealing system

Abstract

This invention relates to an occlusion system in which the distal end of an anchoring sleeve is fitted to the proximal end of a delivery sleeve. The inner cavity of the delivery sleeve communicates with the inner cavity of the anchoring sleeve. The inner diameter of the anchoring sleeve is larger than that of the delivery sleeve. An anchoring component is fitted within the inner cavity of the anchoring sleeve, and an occlusion component is fitted within the inner cavity of the delivery sleeve, with the occlusion component connected to the anchoring component. The occlusion system provides an anchoring sleeve in addition to the delivery sleeve. Because the inner diameter of the anchoring sleeve is larger than that of the delivery sleeve, the anchoring component can significantly reduce pushing resistance in a larger delivery space, making it easier to push. Furthermore, based on the larger fitting space provided by the anchoring sleeve, the mechanical structure of the anchoring component can be designed to be longer, and the opening angle of the anchoring component can be designed to be larger. Based on the longer mechanical structure and the larger opening angle, the anchoring component can fit more closely to the vessel wall, occupy less space within the lumen, and enhance anchoring capability.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a sealing system for instruments used to seal atrial ruptures. Background Technology

[0002] Aortic dissection occurs when blood from within the aortic lumen tears at the intima, causing separation of the media and extending along the long axis of the aorta, resulting in a separation of the true and false lumens of the aortic wall. The incidence of aortic dissection is 1 in 100,000 to 1 in 200,000 annually, with 65%–70% of patients dying in the acute phase from cardiac tamponade, arrhythmias, or other complications. Therefore, early diagnosis and treatment of aortic dissection are crucial. Aortic dissection typically involves a proximal tear and multiple distal tears. Treatment usually involves sealing the proximal tear first, while distal tears are often not sealed immediately. However, the presence of distal tears still poses a significant risk; backflow of blood can cause the false lumen of the aortic dissection to continue expanding, potentially leading to new tears. Therefore, timely treatment of distal tears is essential to eliminate this potential hazard.

[0003] Currently, aortic dissection can be treated using occlusion devices with anchor hooks, where the anchor hook and occlusion device are delivered to the affected area via an occlusion system. However, existing occlusion systems are prone to problems such as poor delivery and extreme resistance when delivering the anchor hook, and the anchoring ability of the anchor hook is not high enough, failing to achieve good therapeutic results and properly address the tear problem in aortic dissection. Summary of the Invention

[0004] Therefore, it is necessary to provide a blocking system to address the aforementioned technical problems.

[0005] A containment system, the containment system comprising:

[0006] Conveying sleeve;

[0007] An anchoring sleeve, the distal end of which is fitted to the proximal end of the delivery sleeve, the inner cavity of the delivery sleeve communicating with the inner cavity of the anchoring sleeve, wherein the inner diameter of the anchoring sleeve is larger than the inner diameter of the delivery sleeve.

[0008] An anchoring component, which is assembled in the inner cavity of the anchoring sleeve;

[0009] A blocking component is assembled in the inner cavity of the delivery sleeve and is connected to the anchoring component.

[0010] In one embodiment, the inner diameter of the anchoring sleeve is larger than the outer diameter of the delivery sleeve.

[0011] In one embodiment, the blocking system includes:

[0012] A connecting component is provided, wherein the distal end of the anchoring sleeve is detachably mounted to the proximal end of the delivery sleeve via the connecting component.

[0013] In one embodiment, the connecting component is a connecting sleeve, which is fitted between the distal end of the anchoring sleeve and the proximal end of the delivery sleeve, for locking the distal end of the anchoring sleeve and the proximal end of the delivery sleeve or releasing the distal end of the anchoring sleeve and the proximal end of the delivery sleeve.

[0014] In one embodiment, the inner diameter of the anchoring sleeve is 0.3 mm to 0.5 mm larger than the outer diameter of the delivery sleeve.

[0015] In one embodiment, the anchoring component includes:

[0016] An anchoring base having a central axis;

[0017] At least two anchoring claws, all of which are connected to the anchoring base, wherein each of the anchoring claws has an opening angle between itself and the central axis of the anchoring base, the opening angle being between 60° and 90°.

[0018] In one embodiment, the number of anchoring claws is between three and six; and / or,

[0019] The length of the anchoring claw is between 5mm and 10mm.

[0020] In one embodiment, the proximal end of the delivery sleeve has a bendable section, the hardness of which is less than the hardness of other sections of the delivery sleeve; and / or,

[0021] At least a portion of the delivery sleeve is made of a transparent structure; and / or,

[0022] The material of the proximal section of the delivery sleeve is Pebax 5233, and the material of the distal section of the delivery sleeve is Pebax 7233.

[0023] In one embodiment, the blocking system includes:

[0024] A guide sleeve, wherein the inner diameter of the guide sleeve is larger than the outer diameter of the delivery sleeve, and the distal end of the guide sleeve is configured to contact the proximal end of the anchoring sleeve, so that the anchoring component can enter the guide sleeve from the anchoring sleeve.

[0025] In one embodiment, the inner diameter of the guide sleeve is greater than or equal to the inner diameter of the anchor sleeve, and the inner diameter of the guide sleeve is less than or equal to the outer diameter of the anchor sleeve.

[0026] In one embodiment, the anchoring sleeve is made of a metallic material or a polymer material; and / or,

[0027] The material of the conveying sleeve is a polymer material; and / or,

[0028] The anchoring component is made of a nickel-titanium shape memory alloy; and / or,

[0029] The sealing component is a spring coil.

[0030] In the aforementioned occlusion system, an anchoring sleeve is provided in addition to the delivery sleeve. The anchoring sleeve and the delivery sleeve are fitted together to assemble the anchoring component and the occlusion component. Since the inner diameter of the anchoring sleeve is larger than that of the delivery sleeve, the anchoring component can significantly reduce the pushing resistance in a larger delivery space and is easier to push. Moreover, based on the larger assembly space provided by the anchoring sleeve, the mechanical structure of the anchoring component can be designed to be longer and the opening angle of the anchoring component can be designed to be larger. Based on the longer mechanical structure and the larger opening angle, the anchoring component can fit more closely to the vessel wall, occupy less space in the lumen, and enhance the anchoring ability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a sealing system provided in one embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the open state of an anchoring component provided in one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the usage state of an anchoring component provided in one embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the fabrication process of the anchoring component in the prior art;

[0035] Figure 5 This is a schematic diagram of the open state of the anchoring component in the prior art;

[0036] Figure 6 This is a schematic diagram illustrating the usage of anchoring components in the prior art.

[0037] Icon labels:

[0038] 1000, Conveying sleeve; 2000, Anchoring sleeve; 3000, Anchoring component; 4000, Sealing component; 5000, Connecting component; 6000, Support; a, Interlayer rupture;

[0039] 1100, Anchoring base; 1200, Anchoring claw;

[0040] 1100a, central axis. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] To more clearly describe the structure of the occlusion system, the term "distal" is defined herein as the end furthest from the target object during the surgical procedure, i.e., the end closest to the operator, and "proximal" as the end closest to the target object during the surgical procedure. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0048] See Figures 1 to 3As shown, an embodiment of the present invention provides a sealing system, the sealing system including a delivery sleeve 1000 and an anchoring sleeve 2000. The delivery sleeve 1000 has an inner cavity and openings at both ends through the inner cavity, making the delivery sleeve 1000 a hollow tubular structure with openings at both ends. At the same time, the anchoring sleeve 2000 also has an inner cavity and openings at both ends through the inner cavity, making the anchoring sleeve 2000 also a hollow tubular structure with openings at both ends. The distal end of the anchoring sleeve 2000 is fitted to the proximal end of the delivery sleeve 1000. The inner cavity of the delivery sleeve 1000 is connected to the inner cavity of the anchoring sleeve 2000. The inner diameter of the anchoring sleeve 2000 is larger than that of the delivery sleeve 1000. The sealing system uses the delivery sleeve 1000 and the anchoring sleeve 2000 to assemble the anchoring component 3000 and the sealing component 4000, respectively, instead of using only the delivery sleeve 1000 to assemble the anchoring component 3000 and the sealing component 4000. This allows the sealing system to take into account the structural characteristics of the anchoring component 3000 when assembling the anchoring component 3000 and the sealing component 4000.

[0049] Specifically, the inner diameter of the anchoring sleeve 2000 is larger than that of the conveying sleeve 1000, thereby enabling the anchoring sleeve 2000 with a larger inner diameter to provide a larger conveying space and assembly space. In other words, the larger inner cavity space can facilitate both conveying and assembly. Compared to assembling the anchoring component 3000 within the delivery sleeve 1000 with a smaller inner diameter, the anchoring component 3000 significantly reduces pushing resistance within a larger delivery space. This makes it easier to push the anchoring component 3000 and the occlusion component 4000 during delivery. Furthermore, based on the larger assembly space provided by the anchoring sleeve 2000, the mechanical structure of the anchoring component 3000 can be designed to be longer, significantly increasing its length compared to existing designs. The longer mechanical structure provides a stronger anchoring effect. Simultaneously, the opening angle of the anchoring component 3000 can be designed to be larger, reducing the occupancy of the true lumen space in the anchored state. In summary, the anchoring component 3000, based on its longer mechanical structure and larger opening angle, allows it to fit more closely to the vessel wall, occupying less space within the lumen and enhancing its anchoring capability.

[0050] Furthermore, the inner diameter of the anchoring sleeve 2000 can be larger than the outer diameter of the delivery sleeve 1000. In this case, the delivery sleeve 1000 and the sealing component 4000 can enter the anchoring sleeve 2000 simultaneously and be pushed forward, thereby reducing the pushing resistance. If the inner diameter of the anchoring sleeve 2000 is larger than the inner diameter of the delivery sleeve but smaller than the outer diameter of the delivery sleeve 1000, the walls of the delivery sleeve 1000 and the anchoring sleeve 2000 will abut against each other, causing the sealing component 4000 to enter the anchoring sleeve 2000 alone, thus increasing the pushing resistance.

[0051] Therefore, the sealing system provides an anchoring sleeve 2000 in addition to the delivery sleeve 1000, so that the anchoring sleeve 2000 and the delivery sleeve 1000 can be fitted together with the anchoring component 3000 and the sealing component 4000. Since the inner diameter of the anchoring sleeve 2000 is larger than that of the delivery sleeve 1000, the larger internal cavity space provides the possibility of improving the performance and mechanical structure of the anchoring component 3000. The sealing system can pre-install the anchoring component 3000 and the sealing component 4000 in the anchoring sleeve 2000 and the delivery sleeve 1000, that is, the anchoring component 3000 is installed in the inner cavity of the anchoring sleeve 2000, the sealing component 4000 is installed in the inner cavity of the delivery sleeve 1000, and the sealing component 4000 is connected to the anchoring component 3000.

[0052] The distal end of the anchoring sleeve 2000 can be assembled to the proximal end of the delivery sleeve 1000 using various structural forms. For example, the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000 can be assembled using snap-fit, threaded, sleeved, or clamping positioning methods. Alternatively, the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000 can be directly connected, or they can be indirectly connected using other components. Those skilled in the art can choose a suitable assembly method to connect the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000 according to their needs, without any limitations.

[0053] See Figure 1As shown, in one embodiment, the plugging system includes a connecting component 5000. Therefore, the connecting component 5000 allows for an indirect connection between the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000. Specifically, the distal end of the anchoring sleeve 2000 can be detachably mounted to the proximal end of the delivery sleeve 1000 via the connecting component 5000. When assembling the plugging system, the anchoring component 3000 can be mounted in the anchoring sleeve 2000, and the plugging component 4000 can be mounted in the delivery sleeve 1000. The connecting component 5000 connects the distal end of the anchoring sleeve 2000 to the proximal end of the delivery sleeve 1000, allowing the inner cavity of the anchoring sleeve 2000 to communicate with the inner cavity of the delivery sleeve 1000, thus maintaining a connection between the plugging component 4000 and the anchoring component 3000. When it is necessary to separate the distal end of the anchoring sleeve 2000 from the proximal end of the delivery sleeve 1000, it is only necessary to operate the connecting component 5000 to release the connection between the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000.

[0054] In one embodiment, the connecting component 5000 is a connecting sleeve, which is fitted between the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000. The connecting sleeve is used to lock or release the connection between the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000. When the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000 are directly connected, the connecting sleeve actually locks or releases the connection between the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000. Alternatively, the distal end of the anchoring sleeve 2000 and the proximal end of the delivery sleeve 1000 may not be directly connected, but rather indirectly connected via the connecting sleeve.

[0055] The inner diameter of the anchoring sleeve 2000 is larger than that of the delivery sleeve 1000 to provide more assembly space. Therefore, those skilled in the art can reasonably increase the size of the inner diameter of the anchoring sleeve 2000 according to requirements. For example, the inner diameter of the anchoring sleeve 2000 can be not only larger than that of the delivery sleeve 1000, but even larger than the outer diameter of the delivery sleeve 1000. In one embodiment, the delivery sleeve 100... The outer diameter of 0 is 5F. Optionally, the inner diameter of the anchoring sleeve 2000 can be 0.3mm to 0.5mm larger than the outer diameter of the conveying sleeve 1000. For example, the inner diameter of the anchoring sleeve 2000 can be 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, or 0.5mm larger than the outer diameter of the conveying sleeve 1000, and is not limited here.

[0056] In one embodiment, the anchoring component 3000 includes an anchoring base 1100 and at least two anchoring claws 1200. The anchoring base 1100 has a central axis 1100a, and the anchoring claws 1200 are connected to the anchoring base 1100, wherein the anchoring claws 1200 and the central axis 1100a of the anchoring base 1100 have an opening angle. The anchoring component 3000 is made of nickel-titanium shape memory alloy, for example, the anchoring component 3000 is made of nickel-titanium shape memory alloy tube, and the nickel-titanium shape memory alloy tube is laser-cut and heat-set. Laser cutting can cut the nickel-titanium shape memory alloy tube into interconnected anchoring bases 1100 and multiple anchoring claws 1200, as described in [reference needed]. Figure 2 As shown, if the anchoring component 3000 is made of nickel-titanium shape memory alloy through laser cutting and heat treatment, its form can be varied according to requirements. For example, the anchoring component 3000 can maximize the opening angle so that the angle between the opening of the anchoring claw 1200 cut from the nickel-titanium shape memory alloy tube and the central axis 1100a of the anchoring base 1100 is between 60° and 90°, and can be selected as 70° to 85°. At the same time, the claw length of the anchoring claw 1200 can be increased, with a length range of 5mm to 10mm, and can be selected as 6mm to 8mm.

[0057] contrast Figure 2 , Figure 3 and Figure 5 , Figure 6 As shown, Figure 2 , Figure 3The image shown is of the anchoring component 3000 obtained after laser cutting and heat setting in this application. It clearly has a larger opening angle and length, enabling it to form a smaller footprint and a larger anchoring area within the cavity, resulting in a better final anchoring effect. Figure 5 , Figure 6 The image shows the existing anchoring component 3000, and also refers to... Figure 4 As shown, hollow nickel-titanium tubes are laser-cut and heat-set, but the cut portion of the hollow nickel-titanium tube is retained. In order to ensure that it does not occupy too much space in the true lumen of the blood vessel implanted in the human body, the length of the hook is limited by the length of the hollow nickel-titanium tube, resulting in insufficient anchoring ability.

[0058] In one embodiment, the number of anchoring claws 1200 is between 3 and 6. For example, the number of anchoring claws 1200 can vary from 3 to 6. When the number of anchoring claws 1200 is determined, the multiple anchoring claws 1200 can be evenly arranged around the central axis 1100a in the circumference of the anchoring base 1100, so that the multiple anchoring claws 1200 can provide a uniform and stable gripping force in the circumferential direction, thereby enabling the multiple anchoring claws 1200 to form a stable gripping connection with the mesh of the support 6000. When the number of anchoring claws 1200 is greater than 6, the width of the anchoring claws 1200 will become very thin, increasing the requirements for the manufacturing process, and they are prone to breakage during use. When the number of anchoring claws 1200 is between 3 and 6, the anchoring capacity can be enhanced while ensuring the stability of assembly and transportation, and the manufacturing cost can be reduced.

[0059] The length of the anchoring claw 1200 is between 5mm and 10mm. Those skilled in the art can determine the appropriate length of the anchoring claw 1200 according to the area of ​​the final sealed interlayer breach a and the mesh size of the supporting bracket 6000. Specifically, the length of the anchoring claw 1200 can also be further selected to be between 6mm and 8mm. The length of the anchoring claw 1200 can be 6mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8mm, etc., and is not limited here.

[0060] In one embodiment, the proximal end of the delivery sleeve 1000 has a bendable section, the hardness of which is less than that of other sections of the delivery sleeve 1000. For example, the outer layer material of the proximal end of the delivery sleeve 1000 can be Pebax 5233 (a type of block polyether amide resin), and the outer layer material of the mid-distal end of the delivery sleeve 1000 can be Pebax 7233 (a type of block polyether amide resin). The hardness of Pebax 7233 is lower than that of Pebax 5233. Therefore, the proximal end of the delivery sleeve 1000 is softer than the mid-distal end of the delivery sleeve 1000. The softer proximal end of the delivery sleeve 1000 helps to smoothly navigate bends in tortuous blood vessels in the body, avoids damage to blood vessels, and makes it easier to reach the dissection rupture a location for closure. At the same time, the mid-distal end of the delivery sleeve 1000 is harder, which helps to push the delivery sleeve 1000 forward in the body.

[0061] At least a portion of the delivery sleeve 1000 is made of a transparent structure. For example, a portion of the delivery sleeve 1000 may be constructed as a transparent structure, such as Pebax 7233, so that the surgeon can identify the position and assembly of the occlusion component 4000 in the delivery sleeve 1000 from the outside by means of the transparent structure.

[0062] The occlusion system constructed by the delivery sleeve 1000 and the anchoring sleeve 2000 can also be used in conjunction with other conduits. For example, the delivery sleeve 1000 and the anchoring sleeve 2000 can be used in conjunction with a 6F guide sleeve. In one embodiment, the occlusion system includes a guide sleeve with an inner diameter larger than the outer diameter of the delivery sleeve 1000. The distal end of the guide sleeve is configured to contact the proximal end of the anchoring sleeve 2000, allowing the anchoring component 3000 to enter the guide sleeve from the anchoring sleeve 2000. In practical use, the proximal end of the anchoring sleeve 2000 can be pressed against the distal end of the guide sleeve. The guide sleeve serves to guide the anchoring component 3000 and restrict the movement of the anchoring sleeve 2000. At this time, the delivery sleeve 1000 is pushed towards the proximal end. The delivery sleeve 1000 pushes the anchoring component 3000. Since the anchoring component 3000 is pushed towards the proximal end, while the anchoring sleeve 2000 is restricted by the guide sleeve and cannot move, the anchoring component 3000 can be separated from the anchoring sleeve 2000. Then, the anchoring component 3000 passes through the anchoring sleeve 2000 and moves towards the proximal end, thereby entering the guide sleeve.

[0063] In one embodiment, the inner diameter of the guide sleeve is greater than or equal to the inner diameter of the anchor sleeve 2000, and the inner diameter of the guide sleeve is less than or equal to the outer diameter of the anchor sleeve 2000. Specifically, the inner diameter of the guide sleeve and the inner diameter of the anchor sleeve 2000 can be equal to or very close to each other, so that when the distal end of the guide sleeve comes into contact with the proximal end of the anchor sleeve 2000, the distal end of the guide sleeve and the proximal end of the anchor sleeve 2000 can form a relatively suitable contact area and a relatively stable contact effect.

[0064] In one embodiment, the anchoring sleeve 2000 is made of a metal material or a polymer material. For example, the anchoring sleeve 2000 is made of a 304 stainless steel tube, a nickel-titanium alloy tube, or other metal tubes, or the anchoring sleeve 2000 is made of a Peek tube, a Pebax tube, or other rigid polymer tubes.

[0065] The material of the conveying sleeve 1000 is a polymer material, for example, the conveying sleeve 1000 is a polymer tube made of Pebax, PEEK, etc.

[0066] The sealing component 4000 is a spring coil, which is constructed as a three-dimensional structure. For example, the spring coil can be spherical, hemispherical, or other three-dimensional structures in its natural state. However, when the spring coil is assembled in the inner cavity of the delivery sleeve 1000, the spring coil will be subjected to the force exerted on the spring coil by the inner wall of the delivery sleeve 1000. Therefore, the force exerted on the inner wall of the delivery sleeve 1000 can keep the spring coil in a state that tends to be straightened, so that the spring coil is straightened along the axial direction of the delivery sleeve 1000 under the force, and is in an approximately bent and straightened state in the inner cavity of the delivery sleeve 1000.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sealing system, characterized in that, The blocking system includes: Conveying sleeve; An anchoring sleeve, the distal end of which is assembled to the proximal end of a delivery sleeve, wherein the distal end of the anchoring sleeve and the proximal end of the delivery sleeve are directly connected, or the distal end of the anchoring sleeve and the proximal end of the delivery sleeve are indirectly connected by a component; the inner cavity of the delivery sleeve communicates with the inner cavity of the anchoring sleeve, wherein the inner diameter of the anchoring sleeve is larger than the inner diameter of the delivery sleeve. An anchoring component, which is assembled in the inner cavity of the anchoring sleeve; A blocking component, which is assembled in the inner cavity of the delivery sleeve and connected to the anchoring component; A guide sleeve, wherein the inner diameter of the guide sleeve is larger than the outer diameter of the delivery sleeve, and the distal end of the guide sleeve is configured to contact the proximal end of the anchoring sleeve, so that the anchoring component can enter the guide sleeve from the anchoring sleeve.

2. The sealing system according to claim 1, characterized in that, The inner diameter of the anchoring sleeve is larger than the outer diameter of the delivery sleeve.

3. The sealing system according to claim 1, characterized in that, The blocking system includes: A connecting component is provided, wherein the distal end of the anchoring sleeve is detachably mounted to the proximal end of the delivery sleeve via the connecting component.

4. The sealing system according to claim 3, characterized in that, The connecting component is a connecting sleeve, which is fitted between the distal end of the anchoring sleeve and the proximal end of the delivery sleeve, for locking the distal end of the anchoring sleeve and the proximal end of the delivery sleeve or releasing the distal end of the anchoring sleeve and the proximal end of the delivery sleeve.

5. The sealing system according to claim 1, characterized in that, The inner diameter of the anchoring sleeve is 0.3 mm to 0.5 mm larger than the outer diameter of the delivery sleeve.

6. The sealing system according to claim 1, characterized in that, The anchoring component includes: An anchoring base having a central axis; At least two anchoring claws, all of which are connected to the anchoring base, wherein each of the anchoring claws has an opening angle between itself and the central axis of the anchoring base, the opening angle being between 60° and 90°.

7. The sealing system according to claim 6, characterized in that, The number of anchoring claws is between 3 and 6; and / or, The length of the anchoring claw is between 5mm and 10mm.

8. The sealing system according to claim 1, characterized in that, The proximal end of the delivery sleeve has a bendable section, the hardness of which is less than the hardness of other sections of the delivery sleeve; and / or, At least a portion of the delivery sleeve is made of a transparent structure; and / or, The material of the proximal section of the delivery sleeve is Pebax 5233, and the material of the distal section of the delivery sleeve is Pebax 7233.

9. The sealing system according to claim 1, characterized in that, The inner diameter of the guide sleeve is greater than or equal to the inner diameter of the anchor sleeve, and the inner diameter of the guide sleeve is less than or equal to the outer diameter of the anchor sleeve.

10. The sealing system according to claim 1, characterized in that, The anchoring sleeve is made of metal or polymer material; and / or, The material of the conveying sleeve is a polymer material; and / or, The anchoring component is made of a nickel-titanium shape memory alloy; and / or, The sealing component is a spring coil.

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