CN112656461B - Plugging device - Google Patents

Abstract

The invention relates to a plugging device, which has a compressed state accommodated in a sheath and an expanded state extending out of the sheath and expanding automatically, wherein the plugging device comprises an anchoring part and a telescopic part which are arranged in parallel, the telescopic part is arranged along the axial direction of the plugging device, the anchoring part comprises an anchoring thorn, and the anchoring thorn extends outwards and the tail end of the anchoring thorn faces to the near end under the action of axial compression deformation of the telescopic part in the expanding process of the plugging device; the anchor springs back and clings to the occluding device when the occluding device is converted from the expanded state to the compressed state. According to the plugging device, the anchor stabs cannot block the sheath entering of the plugging device, so that the plugging device can be smoothly recovered into the sheath, and the tail ends of the anchor stabs are prevented from being scraped to the inner wall of the sheath or other instruments.

Description

Plugging device

Technical Field

The invention relates to the technical field of interventional medical instruments, in particular to a plugging device.

Background

In the technical field of left atrial appendage occluders, a plurality of anchors are often provided on the occluder to assist in securing the occluder to the body tissue. However, these anchors are typically heat set or the like so that the distal end automatically extends outward and proximally after deployment of the occluding device. Thus, when the occluder 1 needs to be recovered or needs to be released repeatedly to retract into the sheath 2, the anchor 3 will not be automatically stuck to the occluder 1, as shown in fig. 1. Therefore, the anchor 3 hinders the entire stopper 1 from advancing into the sheath, and if the sheath is advanced strongly, the anchor 3 inevitably scrapes the sheath 2, which not only increases the difficulty of advancing into the sheath, but also damages the sheath 2.

Disclosure of Invention

In view of the above, there is a need to provide an improved occlusion device for solving the problem of the existing occlusion device that the anchor stick obstructs the entire insertion of the occlusion device into the sheath.

An occlusion device is provided with a compressed state accommodated in a sheath and an expanded state which extends out of the sheath and is expanded by itself, the occlusion device comprises an anchoring thorn part and a telescopic part which are arranged in parallel, the telescopic part is arranged along the axial direction of the occlusion device, the anchoring thorn part comprises an anchoring thorn, and the anchoring thorn extends outwards and the tail end of the anchoring thorn faces to the near end under the action of axial compression deformation of the telescopic part in the expanding process of the occlusion device; the anchor springs back and clings to the occluding device when the occluding device is converted from the expanded state to the compressed state.

In one embodiment, the anchoring portion further comprises a support member to which the distal end of the anchoring spike is fixed, the proximal end of the anchoring spike being a free end; when the supporting member is in a linear shape, the anchor stabs are elastically attached to the supporting member.

In one embodiment, during the expansion of the plugging device, the telescopic part is compressed and deformed along the axial direction of the plugging device and pushes the supporting part to be bent and deformed so that the anchoring thorn extends outwards.

In one embodiment, during the transition of the occlusion device from the expanded state to the compressed state, the telescopic portion is deformed in an elongated manner in the axial direction of the occlusion device and tends to straighten the support member so that the anchoring spike is resiliently applied to the support member.

In one embodiment, the axial length of the telescoping portion is greater than or equal to the axial length of the support member in the compressed state.

In one embodiment, the support member is rod-shaped, and the support member is provided with a groove, and when the support member is linear, the anchor thorn is accommodated in the groove on the support member.

In one embodiment, the distal end of the anchor spike is fixed on the distal end of the telescopic part, and the proximal end of the anchor spike is a free end and is attached to the proximal end of the telescopic part; during the axial compression deformation of the telescoping portion, the proximal end of the telescoping portion slides from the proximal end of the anchor barb to the distal end of the anchor barb to extend the anchor barb outward.

In one embodiment, during transition of the occluding device from the expanded state to the compressed state, the telescoping portion is elongated and deformed in an axial direction of the occluding device, and the proximal end of the anchor spike is intended to abut the proximal end of the telescoping portion.

In one embodiment, the occlusion device comprises a support portion, the distal end of the anchor is fixed at the middle section of the support portion, and the proximal end of the anchor is a free end; the flexible portion includes elastic component and annular slider, the near-end of elastic component with the near-end of supporting part is connected, the distal end of elastic component with the slider is connected, the slider cover is established the distal end outside of supporting part.

In one embodiment, during the transition of the occluding device from the expanded state to the compressed state, the elastic member pulls the slider to move to the proximal end of the anchor, so that the proximal end of the anchor is attached to the support.

In one embodiment, during deployment of the occluding device, the support portion radially expands and pushes the slider toward the distal end of the support portion to extend the anchor prongs outward.

In one embodiment, in the deployed state, the minimum angle between the anchoring spike and the central axis of the plugging device ranges from 30 degrees to 60 degrees.

The plugging device comprises an anchoring part and a telescopic part which are arranged in parallel, wherein the telescopic part is arranged along the axial direction of the plugging device, the anchoring part is provided with an anchoring thorn which cannot automatically extend outwards, and the anchoring thorn can only extend outwards and the tail end of the anchoring thorn faces to the near end under the action of axial compression deformation of the telescopic part in the unfolding process of the plugging device so as to be anchored after penetrating into the tissues in the body; when the plugging device is changed from the expansion state to the compression state, the anchor thorn can rebound and is attached to the plugging device, so that the anchor thorn cannot block the sheath entering of the plugging device, the plugging device can be smoothly recovered into the sheath tube, and the tail end of the anchor thorn is prevented from being scraped to the inner wall of the sheath tube or other instruments.

Drawings

FIG. 1 is a schematic structural view of a stopper with an anchor in the prior art when entering a sheath;

FIG. 2 is a schematic view of the entire structure of the occluding device of embodiment 1;

FIG. 3 is a partially enlarged view of the anchoring portion in example 1 when it is not subjected to an external force;

FIG. 4 is a schematic view of the anchoring portion during radial compression;

FIG. 5 is a schematic view of the anchoring portion during radial deployment;

FIG. 6 is a schematic cross-sectional view of the occluding device of example 2;

FIG. 7 is a schematic view showing the overall structure of the occluding device of example 3;

FIG. 8 is an enlarged schematic view of section A of FIG. 7;

FIG. 9 is a schematic cross-sectional view of the occluding device of example 4 when deployed;

fig. 10 is a schematic cross-sectional view of the occluding device of fig. 9 in a compressed state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the field of interventional medical devices, the end of a medical device implanted in a human or animal body closer to an operator is generally referred to as the "proximal end", the end farther from the operator is referred to as the "distal end", and the "proximal end" and the "distal end" of any component of the medical device are defined according to this principle. "axial" generally refers to the length of the medical device as it is being delivered, and "radial" generally refers to the direction of the medical device perpendicular to its "axial" direction, and defines both "axial" and "radial" directions of any component of the medical device in accordance with this principle. The term "connected" in the embodiments includes the case where two components are directly connected and indirectly connected via other components. The following description is directed to the device in its natural state or after deployment for release in vivo, unless otherwise specified.

The technical solution of the present invention will be described in further detail with reference to specific examples.

Example 1

The occlusion device provided in example 1 can be used for occluding the left atrial appendage and can also be used for occluding other in vivo tissues with openings. The details of the occluding device will be described below by way of example to occlude the left atrial appendage.

The occluding device 100 has a collapsed state housed within the sheath for delivery within the body and an expanded state (e.g., a natural state) extending outwardly from the distal end of the sheath and as shown in figure 2 after self-expanding deployment. The configuration of the occluding device 100 after release within the lumen of the left atrial appendage is identical or substantially identical to figure 2.

Referring to fig. 2, the occluding device 100 comprises a central end portion 110 at the proximal end thereof and a plurality of supporting bodies 121 connected to the distal end of the central end portion 110, respectively, wherein the plurality of supporting bodies 121 are arranged around the central end portion 110 at intervals along the circumferential direction of the occluding device 100. The supporting members 121 enclose a columnar supporting portion 120 having a hollow interior. At least one thin film body (not shown) may be provided on the outer or inner surface of the support portion 120, and the thin film body may cover at least the proximal surface of the support portion 120 to occlude the opening of the body tissue upon release of the occluding device 100. The distal ends of the plurality of supporting bodies 121 are bent toward the inside of the occluding device 100, respectively, to prevent the distal ends from scratching the body tissue, and the distal ends are mutually matched to form a distal opening, so that the distal end of the occluding device 100 is in an open shape, and the size of the distal opening can be adaptively adjusted according to the extrusion degree of the body tissue to deform.

The occluding device 100 may be delivered and controllably released in vivo by means of existing sheaths and delivery rods. The central portion 110 is a hollow tubular member with at least a proximal opening, and may have internal threads on the inner wall of the proximal end or external threads on the outer wall of the proximal end, so as to be detachably connected to the distal end of the delivery rod. The occluding device 100 is connected to the distal end of the delivery rod, and then is stored in the sheath, and is delivered to a target site in the body through the sheath and released.

In fig. 2, the support body 121 is a rod-shaped member thicker than a general braided wire, and is a support rod 122 formed by laser cutting or the like using a metal alloy tube such as a nickel-titanium alloy or a tubular member such as a polymer material. In other implementations, the support body 121 may be made of a plurality of braided wires that are braided or wound to form the support rod 122. Each support body 121 may be integrally formed with the central end portion 110 by cutting the same tubular member, or each support body 121 may be separately formed and fixed to the distal end of the central end portion 110 by welding or the like.

The occluding device 100 further comprises an anchoring portion 130 and a telescoping portion 140 arranged in parallel, the telescoping portion 140 being arranged along the axial direction of the occluding device 100. Specifically, one anchoring portion 130 and one expansion portion 140 are provided at the middle section of each support body 121. Thus, the occluding device 100 includes multiple sets of the anchoring sections 130 and the telescoping sections 140. The anchoring portion 130 and the telescopic portion 140 in each group extend along the length direction of the supporting body 121 on which they are arranged, and are arranged in parallel. Each anchoring portion 130 comprises an anchoring spike 131 and a supporting member 132, the distal end of the anchoring spike 131 being fixed to the supporting member 132, preferably arranged in a middle position of the supporting member 132, and the proximal end of the anchoring spike 131 being a free end extending towards the outside of the occlusion device 100. As shown in fig. 3, when the support member 132 is linear, for example, when both ends of the support member 132 are not fixed to the extendable portion 140, the anchor 131 is resiliently attached to the support member 132, that is, the anchor 131 does not automatically spring away from the support member 132 and extends outward. The end of the anchor 131 is shaped like a needle point and can easily penetrate into the body tissue. Furthermore, the groove 133 is arranged at the middle position of the supporting member 132, when the supporting member 132 is linear, the anchor spike 131 rebounds towards the supporting member 132 and is accommodated in the groove 133 on the supporting member 132, so that when the anchor spike 131 rebounds to be attached to the supporting member 132 in a compressed state, the anchor spike 131 is also accommodated in the groove 133 of the supporting member 132, and the tail end of the anchor spike 131 does not extend out of the supporting member 132, thereby ensuring that the whole plugging device 100 can be smoothly recovered to the sheath, and avoiding the tail end of the anchor spike 131 from scraping the inner wall of the sheath or other instruments. Further, the proximal end of the recess 133 has a groove wall 134 gradually inclined from the outside to the inside, so that the distal end of the anchor 131 can easily slide in and out of the groove wall 134.

The support member 132 is an elongated rod, which may be slightly thinner than the support body 121 for better flexibility and bending performance. The expansion part 140 has an axial extension or axial compression capability when acted by an external force, and can restore to the original preset shape after the external force is removed, and the specific shape is not limited. In fig. 2, the expansion part 140 is a figure-8 rod; or two waveform rods with symmetrical mirrors are formed by respectively connecting the two ends of the waveform rods, and compared with an 8-shaped rod, the axial extension or axial compression capacity is stronger. The proximal end of the support member 132 is connected to the proximal end of the telescoping portion 140 and the distal end of the support member 132 is connected to the distal end of the telescoping portion 140. Therefore, when the telescopic portion 140 is deformed in the axial direction, the supporting member 132 is correspondingly deformed, and the anchor spike 131 is accordingly changed in state.

Specifically, after the distal end of the delivery rod is connected to the proximal end of the occluding device 100 and is delivered to a target site to be occluded in the body through the sheath, the delivery rod is pushed toward the distal end, and the occluding device 100 is pushed out from the distal end of the sheath. The occluding device 100 self-expands to a predetermined shape as shown in figure 2 after the radial constraint of the sheath is released. The axial deformation of the extension portion 140 provides a large enough driving force for the anchor portion 130 to ensure the smooth extension or resilient attachment of the anchor 131, which can be achieved by selecting the material of the extension portion 140 and the support member 132, controlling the heating time of the material, and other processing methods, for example, the material of the extension portion 140 has a rigidity higher than that of the support member 132, or the heating time of the extension portion 140 is shorter than that of the support member 132 under the condition that the extension portion 140 and the support member 132 are both made of nitinol and have the same heating temperature. In the compressed state, the axial length of the telescopic part 140 is greater than or equal to the axial length of the support member 132, so that the support member 132 can have a better bending effect along with the axial deformation of the telescopic part 140, and the anchor 131 can be better extended or rebounded to be attached.

As shown in the process of FIGS. 4 and 5, the anchoring spike 131 can only extend outward under the action of the axial compressive deformation of the telescopic part 140, that is, as the telescopic part 140 is compressed and deformed in the axial direction of the occluding device 100 and pushes the supporting member 132 to bend and deform, because the anchoring spike 131 does not have a predetermined shape that automatically extends outward during the expansion of the occluding device 100, specifically, the proximal end of the anchoring spike 131 extends outward and the distal end of the anchoring spike 131 faces the proximal end so as to penetrate the body tissue, thereby assisting in fixing the occluding device 100 and making it more stable. In the deployed state, the minimum angle C between the anchor 131 and the central axis of the occluding device 100 ranges from 30 degrees to 60 degrees.

In connection with the process shown in fig. 5 and 4, during the transition of the occluding device 100 from the expanded state to the compressed state, the telescoping portion 140 elongates and deforms in the axial direction of the occluding device 100 and tends to straighten the supporting members 132, and the anchoring thorn 131 gradually springs back and rests on the supporting members 132 after gradually losing the force of the supporting members 132 pushing it outwards.

When the plugging device 100 needs to be recovered or released again after being initially released, the conveying rod can be pulled towards the proximal end and drives the plugging device 100 to move towards the proximal end, so that the plugging device 100 is gradually recovered into the sheath from the proximal end to the distal end and is finally in a compressed state; the occluding device 100 may then be released again by pushing the delivery rod distally. After the occluding device 100 is released in the proper position of the in vivo tissue, the connection between the proximal end of the occluding device 100 and the distal end of the delivery rod can be released, so that the occluding device 100 is completely released, and then the delivery rod and the sheath are recovered together to the outside of the body, thereby completing the occlusion operation.

Example 2

The occluding device 200 of the embodiment 2 is substantially the same as the occluding device 100 of the embodiment 1, and the same parts are not described herein again, and the main differences are as follows:

as shown in fig. 6, the supporting portion 220 of the occluding device 200 of example 2 is a woven mesh with a hollow interior formed by weaving one or more woven filaments 221, the proximal end of the woven mesh is closed by the central end portion 110 and the proximal ends of the woven filaments 221 are fixed, and the distal end of the woven mesh has an opening so that the distal end of the occluding device 200 is open. The expansion and contraction part 240 is a mesh-woven part of the support part 220 disposed adjacent to the support member 132 in parallel in the axial direction, and thus the expansion and contraction part 240 in this embodiment also has the capability of axial compression deformation and axial elongation deformation. The support body 121 is a braided wire 221 thinner than the support rod 122 formed by cutting, and the braided wire 221 may be a nickel-titanium alloy wire or a wire made of a polymer material.

In other implementations, the distal end of the mesh may also be closed and secured by a distal sleeve that closes off and secures the distal ends of the braided wires 221, thereby closing off the distal end of the occluding device 200.

The anchor 131 may be a part of one of the braided wires 221 constituting the supporting portion 220, for example, after the distal end of one of the braided wires 221 of the braided mesh is wound to the middle position of the supporting member 132, the distal end remains a length as the anchor 131. The anchors 131 may also be barbs formed separately and secured to the support member 132 by welding, staking, adhesive or suture attachment. The support member 132 may be a part of one of the knitting yarns 221 of the support portion 220, or may be a cutting bar fixed to the knitted mesh by welding or the like, the knitting yarn 221, or the like.

The expansion part 240 is formed by a portion of an annular sidewall of the woven mesh being pre-shaped to be depressed toward the inside of the support part 220. The expansion part 240 is a discontinuous net with a large opening in the middle, for example, when the expansion part 240 is woven by using the weaving yarn 221, a large opening is formed in the middle position of the expansion part, so as to enhance the axial compression and axial extension capability of the expansion part 240. In other implementations, the telescoping portion 240 may also be a continuous mesh with uniform mesh size.

The occluding device 200 self-expands to a pre-shaped configuration as shown in figure 6 after extending from the distal end of the sheath. During the radial expansion of the supporting portion 220, the expansion portion 240 is compressed and deformed axially, which drives the supporting members 132 connected to the two ends thereof to bend and deform outwardly, thereby forcing the proximal ends of the anchors 131 on the supporting members 132 to extend outwardly to penetrate into the body tissue for anchoring.

When the plugging device 200 is sequentially accommodated in the sheath from the near to the far, the telescopic part 240 is radially compressed by the sheath to axially extend and deform, the supporting member 132 tends to be straightened, and the anchor thorn 131 gradually rebounds and clings to the supporting member 132 after gradually losing the outward pushing force of the supporting member 132, so that the insertion of the plugging device 200 is not hindered, and the tail end of the anchor thorn 131 cannot scrape the inner wall of the sheath or other instruments.

Example 3

The occluding device 300 of embodiment 3 is substantially the same as the occluding device 100 of embodiment 1, and the same parts are not described herein again, the main differences being:

as shown in fig. 7 and 8, the anchoring portion 330 includes only one anchoring barb 131, and is not provided with the supporting member 132 as in embodiment 1. The anchor 131 is an elongated barb, the distal end of the anchor 131 is fixed to the distal end of the telescoping portion 340, and the proximal end of the anchor 131 is a free end and is attached to the proximal end of the telescoping portion 340. During axial compression deformation of the telescoping portion 340, the proximal end of the telescoping portion 340 slides from the proximal end of the anchor barb 131 to the distal end of the anchor barb 131 to extend the proximal end of the anchor barb 131 outwardly. In the process of transforming the occlusion device 300 from the expanded state to the compressed state, the expansion part 340 is elongated and deformed along the axial direction of the occlusion device 300, the proximal ends of the anchors 131 are drawn towards the side wall of the supporting part 320 and tend to be attached to the proximal ends of the expansion part 340, so that the whole sheath entering of the occlusion device 300 is not influenced, and the tail ends of the anchors 131 cannot scrape the inner wall of the sheath or other instruments.

In this embodiment, the telescopic portion 340 is a quadrilateral rod, the proximal end of the telescopic portion 340 is fixedly connected to the proximal portion of the supporting body 121, and the distal end of the telescopic portion 340 is fixedly connected to the distal portion of the supporting body 121. The anchor 131 is located on the outer side of the telescopic part 340, and the proximal end of the anchor 131 abuts against the proximal end of the telescopic part 340, rather than being fixedly connected. In the compressed state, the axial length of the anchor 131 is greater than the axial length of the expansion part 340, and preferably, the difference between the axial length of the anchor 131 and the axial length of the expansion part 340 ranges from 1 to 5 mm.

Example 4

The occluding device 400 of the embodiment 4 is substantially the same as the occluding device 100 of the embodiment 1, and the same parts are not described herein again, but the main differences are:

as shown in fig. 9 and 10, the occluding device 400 includes a support part 420 having closed proximal and distal ends, and the support part 420 may be formed of a plurality of the support rods 122, and the support rods 122 are heat-set in an arc shape protruding outward, and the anchoring thorn 131 is naturally protruded outward by bending deformation of the support rods 122 after releasing, or may be a woven mesh made of the above-mentioned woven wire 221. The proximal end of the support portion 420 is provided with a necked-in central end portion 110 and the distal end is provided with a necked-in distal sleeve 450. The side wall of the supporting part 420 is provided with a plurality of anchoring thorns 131, and the anchoring thorns 131 are slender barbs. The distal end of the anchor 131 is fixed to the middle section of the strut 420, preferably at the location of the strut 420 where it is most bent during deployment, with the proximal end of the anchor 131 being the free end. The telescopic portion 440 includes an elastic member 441 and an annular slider 442, a proximal end of the elastic member 441 is connected to a proximal end of the support portion 420 through the central end portion 110, a distal end of the elastic member 441 is connected to the slider 442, and the slider 442 is sleeved on an outer portion of the distal end of the support portion 420. The elastic member 441 may be a spring or other elastic member having axial expansion and recovery. The slider 442 may be a rigid ring or a flexible ring that is deformable, having an outer diameter slightly less than the inner diameter of the sheath.

In connection with the process illustrated in fig. 9 and 10, the occluding device 400 transitions from the expanded state to the compressed state. When the plugging device 400 is in the unfolded state, the elastic member 441 is stretched, and at this time, the tensile force of the elastic member 441 on the slider 442 is large; during the gradual transition of the occluding device 400 from the expanded state to the compressed state, the pulling force of the elastic member 441 on the slider 442 gradually decreases. When the proximal end surface of the slider 442 moves to the middle section or near the distal end of the anchor 131, the tension of the elastic member 441 on the slider 442 is 0 or very small to prevent the slider 442 from sliding past the distal end of the anchor 131.

The elastic element 441 pulls the slider 442 towards the proximal end along the side wall of the support portion 420 to the proximal end of the anchor 131, thus ensuring that the proximal end of the anchor 131 is applied against the support portion 420. Since the sliding block 442 is located further to the outside than the end of the anchor 131, the anchor 131 is prevented from affecting the sheathing of the occluding device 400, and the end of the anchor 131 does not scrape the inner wall of the sheath or other instruments. The degree of axial deformation of the elastic member 441 can be set as desired, as long as the slider 442 can be pulled to move proximally to the proximal end of the anchor 131 without passing over the distal end of the anchor 131. In conjunction with the process shown in fig. 10 and 9, during deployment of the occluding device 400, the support portion 420, after extending from the distal end of the sheath, self-expands radially to the predetermined shape shown in fig. 9, during which the support portion 420 pushes the slider 442 located at the proximal end of the anchor 131 towards the distal end of the support portion 420. The anchor 131 released from the radial restraint of the slider 442 is gradually moved outward at the proximal end thereof by the radial expansion deformation of the support portion 420, and the anchor 131 is extended outward.

Example 5

The occluding device of example 5 comprises a sealing portion at a proximal end thereof and a securing portion at a distal end thereof, the sealing portion and the securing portion being connected directly or via a connector. The sealing part and the fixing part are arranged at intervals along the axial direction of the plugging device. The structure of the fixing portion is the same as or similar to that of the occluding devices 100 to 400 in any of the above embodiments, so that the problem that the anchoring spike 131 obstructs the insertion of the occluding device into the sheath or scrapes the inner wall of the sheath can be solved, and the effects of the anchoring spike 131 are also provided, which are not described herein again. In contrast, what is used to close the tissue opening in the body is the seal, rather than the proximal portion of the support 120, 220, 320, 420 which is covered with the thin film body; attached to the distal end of the delivery rod is no longer the central end portion 110, but rather a detachable attachment to the distal end of the delivery rod is achieved by the proximal sleeve of the seal.

The sealing part is formed by weaving a plurality of woven wires into a net pipe, and the two ends of the net pipe close and fix the ends of the woven wires through a sleeve respectively. The mesh tube is then heat set into a disk-like configuration, resulting in a seal for sealing the left atrial appendage opening. In another embodiment, the sealing portion may be heat-set in a plug-like or column-like shape. The sealing portion includes a distal disc surface at a distal end thereof facing the fixing portion, and a proximal disc surface opposite the distal disc surface. The inside of sealing portion can be equipped with at least one deck film body, and on the weaving silk at sealing portion edge was fixed to the edge of one of them film body, other film bodies can be fixed in other positions in sealing portion as long as can hinder blood flow and pass through can. The membrane body is configured to prevent blood flow from one side of the seal to the other to prevent blood flow communication between the left atrial appendage and the left atrium.

In other implementations, the distal end of the sealing portion abuts the proximal end of the fixation portion after release of the occluding device. In other implementations, such as for atrial septal defect occlusion, the sealing portion and the fixation portion can be brought closer together or into abutment upon release to secure the occluding device over the septum between the left atrium and the right atrium to effect occlusion.

The plugging device can carry out in vivo delivery and controlled release by means of the existing sheath tube and the delivery rod. The proximal sleeve of the sealing portion is removably attached to the distal end of the delivery rod. When the sealing part is connected with the conveying rod, the sealing part is contained in the sheath tube and is conveyed to a target position in the body along with the sheath tube. The delivery rod is then pushed distally to extend the fixation portion from the distal end of the sheath for release and deployment. After the fixing part is released and fixed at the target position in the body, the conveying rod is continuously pushed towards the far end, so that the sealing part extends out of the far end of the sheath tube to be released and unfolded, and the opening of the tissue in the body is sealed. And finally, the connection between the conveying rod and the sealing part is released, and the conveying rod and the sheath tube are recovered to the outside of the body, so that the blocking operation is completed.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. An occlusion device, which has a compressed state accommodated in a sheath and an expanded state after extending out of the sheath and self-expanding, and is characterized in that the occlusion device comprises an anchoring part and a telescopic part which are arranged in parallel, the telescopic part is arranged along the axial direction of the occlusion device, the anchoring part comprises an anchoring thorn, and the anchoring thorn extends outwards and the tail end of the anchoring thorn faces to the near end under the action of axial compression deformation of the telescopic part in the expanding process of the occlusion device; the anchor springs back and clings to the occluding device when the occluding device is converted from the expanded state to the compressed state.

2. The occlusion device of claim 1, wherein the anchoring spike further comprises a support member to which a distal end of the anchoring spike is secured, a proximal end of the anchoring spike being a free end; when the supporting member is in a linear shape, the anchor stabs are elastically attached to the supporting member.

3. The occlusion device of claim 2, wherein during deployment of the occlusion device, the telescoping portion compressively deforms in an axial direction of the occlusion device and urges the support member to bendingly deform to extend the anchor prongs outward.

4. The occlusion device of claim 2, wherein during transition of the occlusion device from the expanded state to the compressed state, the telescoping portion elongates and deforms in an axial direction of the occlusion device and tends to straighten the support members such that the anchoring spike resiliently bears against the support members.

5. The occlusion device of claim 2, wherein an axial length of the telescoping portion is greater than or equal to an axial length of the support in a compressed state.

6. The occlusion device of claim 2, wherein the support member is rod-shaped and has a recess, and wherein when the support member is linear, the anchor spike is received in the recess in the support member.

7. The occlusion device of claim 1, wherein a distal end of the anchor spike is secured to a distal end of the telescoping portion and a proximal end of the anchor spike is free and is affixed to a proximal end of the telescoping portion; during the axial compression deformation of the telescoping portion, the proximal end of the telescoping portion slides from the proximal end of the anchor barb to the distal end of the anchor barb to extend the anchor barb outward.

8. The occlusion device of claim 7, wherein during transition of the occlusion device from the expanded state to the compressed state, the telescoping portion elongates and deforms in an axial direction of the occlusion device, and a proximal end of the anchor spike tends to abut a proximal end of the telescoping portion.

9. The occlusion device of claim 1, wherein the occlusion device comprises a support portion, a distal end of the anchor spike being secured to a middle section of the support portion, a proximal end of the anchor spike being a free end; the flexible portion includes elastic component and annular slider, the near-end of elastic component with the near-end of supporting part is connected, the distal end of elastic component with the slider is connected, the slider cover is established the distal end outside of supporting part.

10. The occlusion device of claim 9, wherein during transition of the occlusion device from the expanded state to the compressed state, the resilient member pulls the slider to move to the proximal end of the anchor to apply the proximal end of the anchor to the support.

11. The occlusion device of claim 9, wherein during deployment, the support portion radially expands and urges the slider toward the distal end of the support portion to extend the anchoring spike outwardly.

12. The occlusion device of claim 1, wherein in a deployed state, a minimum angle between the anchor barb and a central axis of the occlusion device ranges from 30 degrees to 60 degrees.

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