A sealing device with a cavity-compliant structure

Abstract

The present application relates to the field of medical devices, and in particular to a sealing device with a cavity-compliant structure, comprising a sealing portion, the sealing portion comprising a first sealing member and a second sealing member, the cavity-compliant structure at least partially connecting the first sealing member and the second sealing member, the cavity-compliant structure comprising a cavity adaptor and an enhanced sealing unit, the cavity adaptor being at least partially retractable, the enhanced sealing unit being arranged outside the cavity adaptor and not connected to the cavity adaptor, the enhanced sealing unit and the cavity adaptor cooperating with each other to facilitate filling the gap.

Description

Technical Field

[0001] The present application belongs to the field of medical devices, and specifically relates to a blocking device with a cavity-compliant structure. Background Art

[0002] Patent foramen ovale (PFO) and atrial septal defect (ASD) represent a high risk factor for occult stroke in the general population. The foramen ovale allows for right-to-left atrial shunting during embryonic development, allowing oxygenated placental blood to bypass the nonfunctional fetal lungs. Failure of the foramen ovale to close within the first few years of life, typically due to fusion of the primitive and secondary septa, results in a PFO in adults. The prevalence of PFO is approximately one-fifth to one-third of the general population and is often asymptomatic and undiagnosed. Patients with PFO or ASD face various risks, including hemodynamic changes that increase left-right shunting, deep vein thrombosis, air embolism, and carbon dioxide embolism. Currently, strategies for preventing recurrent stroke in patients with embolic ischemic stroke due to a patent foramen ovale include treatment with antithrombotic drugs and closure of the defect with percutaneous devices or, occasionally, surgical closure.

[0003] Traditionally, a PFO occluder uses two circular or other regularly shaped occluding discs to occlude the foramen ovale, effectively closing the foramen ovale and blocking blood flow. However, the foramen ovale is a flat, narrow tunnel formed by the misalignment of two unconnected atrial septa. Therefore, using a traditional PFO occluder to close the foramen ovale is prone to the following problems: First, after implantation, the foramen ovale tunnel cannot be completely filled, and residual blood flow affects the disc's fit. Second, the disc's fit to the heart tissue is poor, resulting in poor occlusion. Third, the disc's overall mesh structure is tightly connected, resulting in excessive coupling. Uneven tissue can cause deformation of the disc, leading to incomplete endothelialization and even thrombosis. Summary of the Invention

[0004] The purpose of the present invention is to provide a blocking device with a cavity-compliant structure to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present application solves them through the following technical solutions: a sealing device with a cavity-compliant structure, comprising a sealing part, wherein the sealing part comprises a first sealing part and a second sealing part, and the cavity-compliant structure at least partially connects the first sealing part and the second sealing part, and the cavity-compliant structure comprises a cavity adaptor and an enhanced sealing unit, wherein the cavity adaptor is at least partially retractable, and the enhanced sealing unit is arranged outside the cavity adaptor and is not connected to the cavity adaptor.

[0006] In one embodiment, the enhanced sealing unit is connected to the first sealing piece, and the connection point between the two is set on the circumference of one-fifth of the radius of the first sealing piece or on the outer circumference of the first sealing piece or between the above two positions; and the enhanced sealing unit is roughly symmetrically arranged in two U shapes in cross section.

[0007] In one embodiment, the enhanced blocking unit is connected to the second blocking piece; and the enhanced blocking unit is connected to the first blocking piece and the second blocking piece in a fixed connection or a movable connection, wherein the movable connection includes sliding or rolling.

[0008] In one embodiment, the connection point between the enhanced blocking unit and the second blocking piece is arranged on the circumference of one fifth of the radius of the second blocking piece, on the outer circumference of the second blocking piece, or between the two positions.

[0009] In one embodiment, the sliding connection between the enhanced blocking unit and the first blocking member and the second blocking member improves the adaptability of the blocking device and adapts to foramen ovale tunnels of different shapes.

[0010] In one embodiment, the first blocking member includes a first support frame diverging outward from a central position, and the second blocking member includes a second support frame diverging outward from a central position; and the enhanced blocking unit is connected to the first support frame.

[0011] In one embodiment, the first blocking member further includes a first laminating film, and the second blocking member further includes a second laminating film.

[0012] In one embodiment, the first supporting skeleton and the second supporting skeleton are both radially arranged as a whole.

[0013] In another embodiment, the rods of the first support frame diverge from the center and are staggered at the periphery.

[0014] In one embodiment, the cavity compliance structure also includes a deflection structure respectively arranged at both ends of the cavity adapter and connected to the blocking portion, and the deflection structure can enable the cavity adapter to roll, translate, slide sideways, slide horizontally, or move along a preset trajectory relative to the blocking portion.

[0015] In one embodiment, the deflection structure includes a circular track and a spherical engagement member, wherein the spherical engagement member is capable of performing circular motion within the circular track.

[0016] In one embodiment, the deflection structure includes a base and a guide shaft provided on the base, the flexible connector is sleeved outside the guide shaft, and the flexible connector can move along the guide shaft.

[0017] In one embodiment, the cavity adapter is at least partially retractable, and the cavity compliant structure further comprises a restriction unit connected to the cavity adapter.

[0018] In one embodiment, the cavity adapter includes an elastic member and a flexible connector. The flexible connector is provided at both ends of the elastic member, and the flexible connector connects the elastic member and the deflection structure.

[0019] In one embodiment, the limiting units are provided at both ends of the elastic member to prevent the elastic member from being overstretched.

[0020] In one embodiment, the elastic member is a spring.

[0021] In one embodiment, the enhanced blocking unit and the blocking portion form a capsule structure, and the capsule structure is three-dimensional.

[0022] In one embodiment, the first support frame includes a first support member and a second support member, the metal density of the first support member is greater than the metal density of the second support member; and the second support member is connected to the first support member.

[0023] In one embodiment, the enhanced sealing unit is connected to the first support member and / or the second support member; and the preset direction of the second support member is aligned toward the tissue to be closed, and the second support member drives the first bonding film to be aligned toward the tissue to be closed, resulting in a good bonding effect.

[0024] In one embodiment, the enhanced blocking unit includes a flow-blocking membrane, which is elastic; and micropores are provided on the flow-blocking membrane, and the diameter of the micropores ranges from 5 μm to 3 mm.

[0025] In one embodiment, the surface of the enhanced blocking unit is wavy.

[0026] In one embodiment, the enhanced sealing unit further comprises an elastic thread, and the enhanced sealing unit is at least partially wrinkled in a natural state.

[0027] In one embodiment, one end of the second support member is connected to the first support member, and the other end is free.

[0028] In one embodiment, the flow-blocking film is connected to the first support member.

[0029] In one embodiment, the flow-blocking film is connected to the second supporting member.

[0030] In one embodiment, the flow-blocking film is connected to the first laminating film and the second laminating film.

[0031] In one embodiment, the first support member includes a first rod, a joint member, and a second rod, which are axially arranged from the proximal end to the distal end during pre-installation; after the first support frame is released, the second rod is attached to the left atrial surface.

[0032] In one embodiment, the free end of the second support member connected to the first rod member is arranged outward, and the free end of the second support member connected to the second rod member is arranged inward; and the second support member connected to the first rod member and the second support member connected to the second rod member form an angle or are staggered.

[0033] In one embodiment, the second support framework comprises radially arranged braided wires.

[0034] In one embodiment, the flow-blocking membrane is made of an endothelialization-promoting material.

[0035] In one embodiment, the laminating film is a polymer composite material.

[0036] In one embodiment, the center line of the elastic member is straight.

[0037] In one embodiment, the center line of the elastic member is tortuous.

[0038] In one embodiment, the second support member is flexible, and the hardness of the second support member is less than that of the first support member.

[0039] In one embodiment, the first supporting skeleton and the second supporting skeleton have different structures.

[0040] In one embodiment, the first supporting skeleton and the second supporting skeleton have the same or similar structures.

[0041] In one embodiment, the first laminating film is connected to the first supporting member and the second supporting member.

[0042] In one embodiment, a delivery system for releasing the occluding device is included, wherein the delivery system includes an outer sheath tube and a control tube. The occluding device is pre-installed in the outer sheath tube, and the control tube is connected to the first occluding member.

[0043] In one embodiment, the enhanced occlusive unit is biocompatible.

[0044] Compared with the prior art, the advantages of the present invention are:

[0045] 1. In the prior art, the occluding device generally includes two occluding discs and a connecting structure. After being implanted into the foramen ovale, due to the unreasonable shape or adaptability of the connecting structure or the unreasonable connection position with the occluding disc, it is easy to cause a cavity to form between at least two of the connecting structure, the occluding disc and the foramen ovale, so that the foramen ovale tunnel cannot be completely filled, or the occluding disc has a poor fitting effect, resulting in a series of problems. The technical solution of the present application avoids the above problems. The cavity-compliant structure used in the present application to connect the first occluding member and the second occluding member includes a cavity adaptor and an enhanced occluding unit. The cavity adaptor is retractable and can be inserted into the foramen ovale with a larger length. The hole tunnel is responsible for clamping the first and second blocking parts to fix them in the target position, providing clamping force, and the enhanced blocking unit is arranged outside the cavity adapter, which will not affect the clamping force provided by the cavity adapter. It is worth mentioning that since the connection points between the enhanced blocking unit and the first and second blocking parts are on the circumference of one-fifth of the radius of the blocking parts to the outer periphery, and the enhanced blocking unit is roughly symmetrically arranged in two U shapes in cross section, the cavity that would have been formed is filled by the enhanced blocking unit, and the blocking effect is good. In addition, the enhanced blocking unit also has a better filling effect on hypertrophic secondary septa with uneven tissue surface.

[0046] 2. Different from the prior art, the enhanced occluding unit can be connected to the first occluding member and the second occluding member in a movable manner. For example, in the initial state, the connection point of the enhanced occluding unit with the first occluding member is on the circumference of four-fifths of the radius of the first occluding member. However, the patient's foramen ovale tunnel is long and the septum secundum is thick. In order to accommodate the septum secundum tissue and provide more space, the connection point of the enhanced occluding unit is moved to the circumference of two-fifths of the radius of the first occluding member. While ensuring the filling effect, it better adapts to the anatomical structure of the target tissue. Therefore, the enhanced occluding unit of the present application can assist the occluding device to adapt to different foramen ovale tunnels. Moreover, the cavity-compliant structure will not rigidly change the morphology of the atrial septum tissue, but will fit the tissue softly and flexibly, will not damage the surrounding tissue, and will have fewer postoperative complications.

[0047] 3. In the prior art, the first and second occluding members often adopt a mesh-like staggered occluding disc structure. Since the metals are interlaced with each other, if they encounter a part of the protruding cardiac tissue, the entire occluding disc surface will be affected by the protrusion, which can easily cause residual shunt or thrombosis. Therefore, the occluding disc with a mesh structure is not suitable for repairing hypertrophic septum secundum or foramen ovale with a complex surface. The present application avoids the above problems. To address the above problems, the present application adopts a "double insurance" design. First, on the inner side of the first and second occluding members, An adaptive reinforced sealing unit is set on the surface, and the uneven heart tissue first contacts the reinforced sealing unit, and the reinforced sealing unit fills the uneven grooves; secondly, the support members of the supporting skeleton of the first and second sealing members diverge from the center to the outside, and the support members are not densely and evenly arranged on the disk surface, and the various support members are not connected at the contact surface of the heart tissue. If a single support member is slightly lifted up by the action of the protrusion, the other support members will not be affected, thereby roughly ensuring the fitting effect of the first and second sealing members.

[0048] 4. Different from the existing technology, the first support skeleton includes a first support member and a second support member. The first support member has high hardness and mainly plays a supporting role. The second support member has good flexibility and is fitted in a preset direction toward the tissue to be closed, which can drive the first fitting membrane to fit toward the tissue to be closed. The two cooperate with each other to enable the first sealing member to fit well with the foramen ovale tissue; on the other hand, the enhanced sealing unit is connected to the root of the second support member, and the septum secundum is first attached to the heart tissue by the free section of the second support member from top to bottom, and then filled by the enhanced sealing unit. The good transition from the second support member to the enhanced sealing unit is not easy to produce residual shunt, and the sealing effect is good.

[0049] 5. Different from the existing technology, the second support member is at least partially connected to the first bonding film, the bonding member is "buried" in the bonding film and the bonding film forms an integral whole. When the operator punctures the atrial septum where the occlusion device has been implanted, the second support member will deflect under the action of the puncture sheath and restrain the puncture sheath at the same time, so that the intervention position of the puncture sheath is accurate, will not shake randomly, will not automatically correct to the center position of the adjacent supporting member, and also avoids the problem of subsequent operations tearing the bonding film. The structural design is ingenious, improves the success rate of the operation, and has clinical promotion value.

[0050] 6. Different from the existing technology, after the first support frame is released, if the surgeon thinks the release position is not good, the first support frame can be recovered to the delivery system, and the first rod, the joint and the second rod are recovered to the outer sheath in turn, and released again after adjusting the position until it is released to the optimal position, thereby improving the success rate of the operation and ensuring good postoperative expectations.

[0051] 7. Different from the prior art, the cavity-compliant structure also includes a deflection structure, which enables the cavity adapter to roll, translate, slide sideways, slide horizontally, or move along a preset trajectory relative to the occluding portion. The advantage of this design is that compared with the fixedly connected first support frame and channel adapter, the relative movement of the two makes it easier for the first occluding member and the second occluding member to fit the secondary septal tissue and primary septal tissue to be closed, adapt to PFO channels of different shapes and openings, and have a good occluding effect.

[0052] 8. Different from the existing technology, the enhanced blocking unit includes a flow-blocking membrane. The flow-blocking membrane is elastic and conforms to the shape of the tissue under the action of secondary septal tissue and primary septal tissue. The flow-blocking membrane is wrinkled in its natural state. For oval foramen channels with short tunnels, long tunnels or large openings, the stacked flow-blocking membranes can fill them well.

[0053] 9. Different from the existing technology, the cavity adapter is a spring, which is composed of multiple metal rings. During the recovery of the occlusion device, due to the gaps between the metal rings, it is easy to get stuck at the far end of the delivery system. The provision of an enhanced occlusion unit can avoid the above problem. Due to the enhanced elasticity and flexibility of the occlusion unit, the overall surface of the cavity conforms to the structure and is smooth, which is convenient for sheathing and protecting tissues.

[0054] 10. Different from the existing technology, when repairing the oval foramen tissue with long or irregular tunnels, the enhanced occlusion unit stretches out wider and clings to the surface of the oval foramen tissue, thereby providing a part of the stabilizing force, so that the occlusion part, the tissue surface and the enhanced occlusion unit form a steady state of force, which has a certain anti-slip function. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figures 1a to 1c It is a schematic diagram of the overall structure of the blocking device of the present invention, and a schematic diagram of the first supporting frame and the second supporting frame.

[0056] Figures 2a to 2c It is a schematic diagram of the deflection structure, the restriction unit and the enhanced blocking unit of the present invention.

[0057] Figure 3a and 3b Schematic diagrams of the occlusion device of the present invention implanted in a long tunnel and a short tunnel respectively.

[0058] Figures 4a to 4c This is another embodiment of the present invention.

[0059] Figure 5 This is another embodiment of the present invention.

[0060] The names of the parts indicated by the numbers in the accompanying drawings are as follows: 1-sealing device, 2-sealing part, 3-first sealing member, 31-first supporting skeleton, 311-first supporting member, 3111-first rod member, 3112-joining member, 3113-second rod member, 312-second supporting member, 32-first fitting film, 4-second sealing member, 41-second supporting skeleton, 42-second fitting film, 5-cavity conforming structure, 51-cavity adapting member, 511-elastic member, 512-flexible connecting member, 513-flexible member, 5131-barb structure, 52-enhanced sealing unit, 521-flow blocking membrane, 522-capsule structure, 53-deflection structure, 531-circular track, 532-spherical fitting member, 533-base, 534-guide shaft, 54-limiting unit. Implementation Method

[0061] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0062] In this application, the end closer to the surgical operator is defined as the "proximal end", and the end farther from the surgical operator is defined as the "distal end". Specific embodiments Example 1

[0063] like Figures 1a to 1c As shown, during PFO interventional treatment, a closure device 1 with a cavity-compliant structure 5 includes a closure portion 2, wherein the closure portion 2 includes a first closure member 3 and a second closure member 4, and the cavity-compliant structure 5 is at least partially connected to the first closure member 3 and the second closure member 4. The cavity-compliant structure 5 includes a cavity adaptor 51 and an enhanced closure unit 52, wherein the cavity adaptor 51 is at least partially retractable, and the enhanced closure unit 52 is arranged outside the cavity adaptor 51 and is not connected to the cavity adaptor 51.

[0064] In this embodiment, the enhanced blocking unit 52 is connected to the first blocking member 3, and the connection point between the two is set on the circumference of the first blocking member 3 at one-fifth of the radius, or on the outer circumference of the first blocking member 3, or between the above two positions; and the enhanced blocking unit 52 is generally arranged in two U-shaped symmetrical positions in cross section, such as Figure 1b shown.

[0065] In this embodiment, the enhanced blocking unit 52 is connected to the second blocking member 4 ; and the enhanced blocking unit 52 is connected to the first blocking member 3 and the second blocking member 4 in a fixed manner.

[0066] In this embodiment, the connection point between the enhanced blocking unit 52 and the second blocking member 4 is set on the circumference of one-fifth of the radius of the second blocking member 4 or on the outer circumference of the second blocking member 4 or between the above two positions.

[0067] In this embodiment, the first blocking member 3 includes a first support frame 31 that diverges outward from the center position, and the second blocking member 4 includes a second support frame 41 that diverges outward from the center position. Figure 1c As shown; and, the enhanced blocking unit 52 is connected to the first supporting skeleton 31.

[0068] In this embodiment, the first blocking member 3 further includes a first laminating film 32 , and the second blocking member 4 further includes a second laminating film 42 .

[0069] In this embodiment, the first supporting skeleton 31 and the second supporting skeleton 41 are both radially arranged as a whole.

[0070] In this embodiment, the cavity compliance structure 5 also includes a deflection structure 53 respectively arranged at both ends of the cavity adapter 51 and connected to the blocking part 2. The deflection structure 53 can enable the cavity adapter 51 to roll, translate, slide sideways, slide horizontally, or move along a preset trajectory relative to the blocking part 2.

[0071] In this embodiment, the deflection structure 53 includes a circular track 531 and a spherical fitting member 532. The spherical fitting member 532 can perform circular motion in the circular track 531. Figure 2a shown.

[0072] In this embodiment, the cavity adaptor 51 is retractable, and the cavity conforming structure 5 further includes a limiting unit 54 connected to the cavity adaptor 51. Figure 2b shown.

[0073] In this embodiment, the cavity adapter 51 includes an elastic member 511 , and the elastic member 511 is connected to the spherical fitting member. The limiting units 54 are provided at both ends of the elastic member 511 to prevent the elastic member 511 from being overstretched.

[0074] In this embodiment, the elastic member 511 is a spring.

[0075] In this embodiment, the enhanced blocking unit 52 and the blocking portion 2 form a capsule structure 522, such as Figure 3b As shown, the capsule structure 522 is three-dimensional.

[0076] In this embodiment, the first support skeleton 31 includes a first support member 311 and a second support member 312 . The metal density of the first support member 311 is greater than that of the second support member 312 . Moreover, the second support member 312 is connected to the first support member 311 .

[0077] In this embodiment, the enhanced sealing unit 52 is connected to the first support member 311 and the second support member 312; and the preset direction of the second support member 312 is aligned toward the tissue to be closed, and the second support member 312 drives the first bonding film to bond toward the tissue to be closed, and the bonding effect is good.

[0078] In this embodiment, the enhanced blocking unit 52 includes a flow-blocking membrane 521 , and the flow-blocking membrane 521 is elastic. Furthermore, micropores are provided on the flow-blocking membrane 521 , and the diameter of the micropores ranges from 5 μm to 3 mm.

[0079] In this embodiment, the enhanced sealing unit 52 further includes elastic wires, and the enhanced sealing unit 52 is at least partially wrinkled in a natural state.

[0080] In this embodiment, one end of the second support member 312 is connected to the first support member 311, and the other end is free. Figure 1c shown.

[0081] In this embodiment, the flow-blocking film 521 is connected to the roots of the first support member 311 and the second support member 312 .

[0082] In this embodiment, the first support member 311 includes a first rod member 3111, a joint member 3112 and a second rod member 3113, which are axially arranged from the proximal end to the distal end during pre-installation; after the first support frame 31 is released, the second rod member 3113 is in contact with the left atrial surface.

[0083] In this embodiment, the free end of the second support member 312 connected to the first rod member is set outward, and the free end of the second support member 312 connected to the second rod member is set inward; and the second support member 312 connected to the first rod member and the second support member 312 connected to the second rod member form an angle or are staggered.

[0084] In this embodiment, the second support frame 41 includes radially arranged braided metal wires.

[0085] In this embodiment, the flow-blocking film 521 is made of an endothelialization-promoting material, and the bonding film is made of a polymer composite material.

[0086] In this embodiment, the second support member 312 is flexible, and the hardness of the second support member 312 is less than the hardness of the first support member 311 .

[0087] In this embodiment, a delivery system for releasing the blocking device 1 is included. The delivery system includes an outer sheath tube and a control tube. The blocking device 1 is pre-installed in the outer sheath tube. The control tube is connected to the first blocking member 3 .

[0088] In this embodiment, the operation steps are as follows: the delivery system enters the right atrium through the femoral vein, passes through the foramen ovale and reaches the left atrium, then withdraws the outer sheath while pulling the control tube, releases the second blocking member 4, the cavity compliance structure 5 and the first blocking member 3 in sequence, operates the control tube to separate from the blocking member, recovers the delivery system, and completes the implantation. Figure 3a and Figure 3b The occluding device 1 is implanted into a long and narrow foramen ovale tunnel and a shorter tunnel respectively. Example 2

[0089] The difference from the first embodiment is that the enhanced blocking unit 52 is movably connected to the first blocking member 3 and the second blocking member 4 , and the movable connection mode includes sliding or rolling.

[0090] The following describes in detail the composition and connection of the various components in this embodiment with reference to the accompanying drawings:

[0091] During PFO interventional treatment, a closure device 1 with a cavity-compliant structure 5 includes a closure portion 2, wherein the closure portion 2 includes a first closure member 3 and a second closure member 4, wherein the cavity-compliant structure 5 at least partially connects the first closure member 3 and the second closure member 4, and wherein the cavity-compliant structure 5 includes a cavity adaptor 51 and an enhanced closure unit 52, wherein the cavity adaptor 51 is at least partially retractable, and the enhanced closure unit 52 is disposed outside the cavity adaptor 51 and is not connected to the cavity adaptor 51. Figure 4a and 4b shown.

[0092] In this embodiment, the sliding connection between the enhanced blocking unit 52 and the first blocking member 3 and the second blocking member 4 improves the adaptability of the blocking device 1 and is adaptable to foramen ovale tunnels of different shapes.

[0093] In this embodiment, the deflection structure 53 includes a base and a guide shaft provided on the base. The flexible connector 512 is sleeved outside the guide shaft, and the flexible connector 512 can move along the guide shaft.

[0094] In this embodiment, the cavity adaptor 51 includes an elastic member 511 and a flexible connector 512. The flexible connector 512 is provided at both ends of the elastic member 511. The flexible connector 512 connects the elastic member 511 and the deflection structure 53. Figure 4c shown. Example 3

[0095] The difference from the first embodiment is that the cavity adaptor 51 is a flexible component 513 .

[0096] The following describes in detail the composition and connection of the various components in this embodiment with reference to the accompanying drawings:

[0097] During PFO interventional treatment, a closure device 1 with a cavity-compliant structure 5 includes a closure portion 2, wherein the closure portion 2 includes a first closure member 3 and a second closure member 4, wherein the cavity-compliant structure 5 at least partially connects the first closure member 3 and the second closure member 4, and wherein the cavity-compliant structure 5 includes a cavity adaptor 51 and an enhanced closure unit 52, wherein the cavity adaptor 51 is at least partially retractable, and the enhanced closure unit 52 is disposed outside the cavity adaptor 51 and is not connected to the cavity adaptor 51. Figure 5 shown.

[0098] In this embodiment, the surface of the enhanced blocking unit 52 is wavy.

[0099] In this embodiment, a barb structure 5131 is provided on the flexible member 513 .

[0100] The foregoing description of several embodiments of the present application is provided for illustrative purposes. The foregoing description is not intended to be exhaustive, nor is it intended to limit the present application to the precise configurations, structures, and / or steps disclosed. Clearly, based on the foregoing teachings, a person of ordinary skill in the art will be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A blocking device with a cavity-compliant structure, comprising a blocking portion, characterized in that: The sealing portion includes a first sealing member and a second sealing member, the cavity-compliant structure at least partially connects the first sealing member and the second sealing member, the cavity-compliant structure includes a cavity adaptor and an enhanced sealing unit, the cavity adaptor is at least partially retractable or flexible, the enhanced sealing unit is arranged outside the cavity adaptor and is not connected to the cavity adaptor; the first sealing member includes a first supporting skeleton radiating outward from a central position, and the second sealing member includes a second supporting skeleton radiating outward from a central position; and the enhanced sealing unit is connected to the first supporting skeleton, the first supporting skeleton includes a first supporting member and a second supporting member, and the first sealing member also includes a first sticking member The second support member is at least partially connected to the first bonding film, and the metal density of the first support member is greater than that of the second support member; and one end of the second support member is connected to the first support member, and the other end is free; the enhanced sealing unit is connected to the first support member and the second support member; and the preset direction of the second support member is aligned toward the tissue to be closed; the first support member includes a first rod member, a joint member and a second rod member, and the first rod member and the second rod member are both connected to the joint member and are both located on the inner side of the joint member; after being released, the first support skeleton can be recovered to the conveying system, and the first rod member, the joint member and the second rod member are recovered to the outer sheath tube at one time and released again after adjusting the position.

2. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The enhanced blocking unit is connected to the first blocking piece, and the connection point between the two is set on the circumference of one-fifth of the radius of the first blocking piece or on the outer circumference of the first blocking piece or between the above two positions; and the enhanced blocking unit is set in a cylindrical shape or is roughly symmetrically arranged in two U shapes in cross section.

3. A blocking device with a cavity-compliant structure according to claim 1 or 2, characterized in that: The enhanced blocking unit is connected to the second blocking piece; and the enhanced blocking unit is connected to the first blocking piece and the second blocking piece in a fixed connection or a movable connection, wherein the movable connection is sliding or rolling.

4. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The cavity compliance structure also includes a deflection structure respectively arranged at both ends of the cavity adapter and connected to the blocking portion, and the deflection structure can enable the cavity adapter to roll, translate, slide sideways, slide horizontally, or move along a preset trajectory relative to the blocking portion.

5. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The cavity adapter is at least partially retractable, and the cavity compliant structure further includes a limiting unit connected to the cavity adapter.

6. The blocking device with a cavity-compliant structure according to claim 4, characterized in that: The cavity adaptor includes an elastic member and a flexible connector. The flexible connector is provided at both ends of the elastic member, and the flexible connector connects the elastic member and the deflection structure.

7. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The enhanced blocking unit and the blocking portion form a capsule structure, and the capsule structure is three-dimensional.

8. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The enhanced blocking unit includes a flow-blocking membrane, which is elastic; and micropores are provided on the flow-blocking membrane, and the diameter of the micropores ranges from 5 μm to 3 mm.

9. The blocking device with a cavity-compliant structure according to claim 1, characterized in that: The surface of the enhanced blocking unit is wavy.

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