A blocking device

Abstract

The present application relates to the field of medical devices, and in particular to a blocking device, which at least includes a puncture unit, a blocking unit and a locking unit. One end of the puncture unit is connected to the blocking unit. The locking unit includes a first locking portion arranged at the other end of the puncture unit and a second locking portion arranged on the blocking unit. In addition, the locking unit is locked after the puncture unit passes through the tissue to be closed. The first locking portion and the second locking portion remain fixed or only move in one direction after being connected or contacted. The locking unit plays a role in locking the puncture unit and the blocking unit.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a blocking device. Background Art

[0002] The foramen ovale is a physiological passageway in the atrial septum during embryonic development. Recent studies have demonstrated a close association between a patent foramen ovale and unexplained stroke. This is because the following emboli can enter the left ventricular system through a patent foramen ovale, causing corresponding clinical symptoms: 1. thrombosis in the deep veins of the lower limbs or pelvic veins; 2. air emboli caused by decompression sickness or decompression sickness; 3. fat emboli formed after surgery or trauma. Furthermore, the risk of recurrence remains high in patients with a patent foramen ovale who have experienced a thrombotic event. Therefore, addressing the underlying cause and closing the foramen ovale in high-risk individuals is expected to reduce the incidence of stroke. Furthermore, a patent foramen ovale has also been linked to decompression sickness, migraines, and other conditions, and closure of the foramen ovale may be beneficial for these patients.

[0003] The current mainstream clinical product is the traditional double-disc foramen ovale occluder. This device features a double-disc structure with two symmetrical left and right discs, a short waist connecting the two discs, and a protruding central terminal on the left side of the left disc and a protruding central terminal on the right side of the right disc. However, these traditional double-disc foramen ovale occluders have encountered various problems in clinical use. If the foramen ovale is close to the superior or inferior vena cava or the main pulmonary artery, the edge of the occluder may abrade the blood vessels, resulting in occlusion failure; and due to the complex structure of the heart and the different sizes of the foramen ovale tunnel, many patients find it difficult to accept the placement of the occluder in the heart, which may increase the risk of complications in the short and long term; in addition, there are PFO suture devices for closing the foramen ovale, but because the point of action of the suture line is small, the left and right sides of the secondary septum and the primary septum will still cause blood shunt after suturing, and the occlusion effect is limited. At the same time, the PFO suture has strict requirements on the puncture points of the secondary septum and the primary septum, and the operation requirements are high, and the success rate of the operation is difficult to guarantee.

[0004] In summary, the existing technology has the following problems that need to be solved urgently: first, the left atrial disc of the double-disc occluder easily wears the blood vessels; second, the existing suturing device has a small range of action, resulting in blood shunt on the left and right sides of the secundum. Summary of the Invention

[0005] This application is proposed in view of the above and other more concepts.

[0006] One of the purposes of the present application is to overcome the deficiencies of the prior art and to provide a novel occluding device to block foramen ovale channels of different shapes in view of the defects of the double-disc structure and the limitations of the suturing device.

[0007] The object of the present invention is achieved through the following solutions:

[0008] A blocking device comprises at least a puncture unit, a blocking unit and a locking unit, wherein one end of the puncture unit is connected to the blocking unit, and the locking unit comprises a first locking portion arranged at the other end of the puncture unit and a second locking portion arranged on the blocking unit, and the locking unit is locked after the puncture unit passes through the tissue to be closed, and the first locking portion and the second locking portion remain fixed or move only in one direction after being connected or in contact.

[0009] The purpose of the present invention can be further achieved by the following technical solutions:

[0010] Furthermore, the puncture unit includes a puncture part and a connecting part, the first locking part is arranged at the distal end of the puncture part, and the connecting part is arranged at the proximal end of the puncture part.

[0011] Furthermore, the puncture portion and the connection portion both have a preset shape, and after the blocking device is released, the connection portion and the proximal end portion of the puncture portion form a certain angle.

[0012] Furthermore, the puncture portion is a metal wire.

[0013] Furthermore, the puncture portion is a polymer thread.

[0014] Furthermore, a horizontal section is provided at the connection between the puncture portion and the connection portion, and the horizontal section prevents the puncture portion from tearing secondary septal tissue and enlarging the puncture point.

[0015] Furthermore, the connecting portion includes a snap-fit ​​structure and a guide, and the two are detachably connected; and the blocking unit includes a coupling, the guide is sleeved in the coupling, and the coupling is connected to the snap-fit ​​structure along the guide.

[0016] Furthermore, the snap-fit ​​structure enters the coupling piece.

[0017] Furthermore, the joint is arranged on one side of the blocking unit.

[0018] Furthermore, the joint is provided at the upper end portion of the blocking unit.

[0019] Furthermore, the guide member is a flexible rope.

[0020] Furthermore, the buckle structure is provided with a small hole, and the guide member passes through the small hole during pre-installation.

[0021] Further, the locking unit includes a pulling piece, and the pulling piece passes through the second locking portion during pre-assembly.

[0022] Furthermore, the distal end portion of the pulling member is in a closed shape, an elliptical shape, or a ring shape.

[0023] Furthermore, the pulling member moves toward the distal end to hook the first locking portion.

[0024] Furthermore, it also includes a delivery system, which includes an outer sheath, a puncture tube and a loading tube. The puncture unit is pre-installed in the puncture tube, and the blocking unit is pre-installed in the loading tube.

[0025] Furthermore, the puncture tube and the loading tube are pre-installed in the outer sheath tube.

[0026] Furthermore, the distal end of the puncture tube is sharp, which facilitates puncturing tissue.

[0027] Furthermore, the diameter of the puncture tube is smaller than the diameter of the loading tube.

[0028] Furthermore, the puncture unit is pre-installed in the outer sheath, and when the occlusion device is implanted, the puncture unit directly punctures the heart tissue.

[0029] Furthermore, the delivery system also includes a support rod arranged in the puncture tube, and the puncture unit is arranged at the distal end of the support rod when pre-installed; and the delivery system also includes a control member, which is connected to the blocking unit and can push or pull the blocking unit.

[0030] Furthermore, when the puncture tube is retracted and enters the outer sheath, the support rod presses against the puncture unit, and the puncture unit restores the preset shape and is connected to the secondary septum and the primary septum.

[0031] Furthermore, the support rod can also pull the puncture unit.

[0032] Furthermore, the control member is pulled so that the occluding unit is not in contact with the foramen ovale tissue, and then the pulling member is operated so that the first locking part passes through or connects to the second locking part to complete the locking, and then the control member is gradually released so that the occluding unit is in contact with the right atrial surface.

[0033] Furthermore, the blocking unit includes two coupling members; and the coupling members and the second locking portion form a triangular stable structure.

[0034] Furthermore, the connection structure includes two guiding members.

[0035] Furthermore, the puncture tube is provided with a slit; and the guide member is arranged in the loading tube after passing through the slit.

[0036] Furthermore, the slit provides a space or path for the guide member to enter the puncture tube and the loading tube.

[0037] Furthermore, after the occluding device is implanted, part of the puncture portion passes through two pieces of tissue to be closed, and the occluding unit adheres to one side of the tissue to be closed; and the locking unit restricts the puncture unit and the occluding unit from separating.

[0038] Furthermore, the first locking portion includes a latching tooth, the second locking portion includes a lock buckle, and the pulling member is used to pull the latching tooth into the lock buckle; and the latching tooth passes through the lock buckle in a one-way manner.

[0039] Furthermore, the latch teeth are oriented toward the ventricle after entering the lock buckle.

[0040] Furthermore, the first locking portion includes an anchoring claw and a sheath, the sheath is arranged outside the anchoring claw, and the pulling member is used to pull the sheath through the second locking portion; and the pulling member is continued to operate to pull the sheath, and the sheath is separated from the anchoring claw.

[0041] Furthermore, the blocking unit is disc-shaped.

[0042] Furthermore, the blocking unit includes a blocking membrane and a stabilizing structure.

[0043] Furthermore, the stabilizing structure is arranged on the outer ring of the blocking unit.

[0044] Furthermore, the stabilizing structure includes a support member radiating from the center and a fitting member connected to the support member, and the fitting member guides the occluding membrane to fit toward the tissue to be closed; and the periphery of the occluding unit is completely unsealed.

[0045] Furthermore, the second locking portion is provided at a lower portion of the center of the blocking unit.

[0046] Furthermore, the second locking portion is arranged on the center line of the blocking unit.

[0047] Furthermore, the connecting portion includes two snap structures.

[0048] Furthermore, the blocking unit includes three coupling members, and the connecting portion includes three snap structures.

[0049] Furthermore, the locking unit fixes the puncture unit and the locking unit.

[0050] Furthermore, the locking unit is made of a degradable material.

[0051] Compared with the prior art, the advantages of the technical solution of this application include at least the following:

[0052] 1. In the prior art, after the suturing device is implanted, only the suture remains in the foramen ovale tissue, while the septum secundum and septum primum tissue are sheet-shaped or flap-shaped. Although the centers of the septum secundum and septum primum tissues are fixed with sutures, under the continuous beating of the heart, since there are no occluders on both sides, blood shunt is easily generated on the left and right sides of the septum secundum and septum primum tissues. The present application solves the above problems. The present application includes a puncture unit, an occlusion unit, and a locking unit for locking the puncture unit and the occlusion unit. Thus, the puncture unit passes through the septum secundum and septum primum tissues to fix them, and only the linear or filamentous puncture unit is located on the left atrial surface, which avoids scratching the superior and inferior vena cava or the main pulmonary artery due to the occlusion disk provided on the left atrial surface. problem; secondly, the occluding unit fits with the right atrial surface, and the occluding unit completely covers the foramen ovale tissue on the right atrial surface. There is no gap or space on the left and right sides of the foramen ovale where blood shunting can occur, and the occluding effect is good. At the same time, due to the setting of the occluding unit, the device has low requirements on the puncture point position of the puncture unit during the operation. As long as the secondary septum and the primary septum tissue are connected, the occluding effect can be achieved; thirdly, the locking unit fixes the puncture unit and the occluding unit, and the first locking part and the second locking part of the locking unit keep moving only in one direction after connection or contact. Therefore, during the beating of the heart, the first locking part drives the puncture unit to move in the direction of the second locking part, and the connection between the two pieces of tissue to be closed will become tighter and tighter, and the occluding effect is excellent.

[0053] 2. Different from the existing technology, the puncture unit and the blocking unit are pre-installed in two sheaths respectively. In this way, the puncture tube pre-installed with the puncture unit can be made thin enough to facilitate tissue puncture, and the blocking unit will not affect it during the release process of the puncture unit. During the operation, as long as the blocking unit has not been released, the puncture tube can be punctured multiple times to achieve the optimal puncture position.

[0054] 3. Different from the existing technology, the two ends of the puncture part are respectively a first locking part and a connecting part, wherein the connecting part is first connected to the coupling part of the blocking unit through a guide part to complete the connection between the blocking unit and the puncture unit, and then, by operating the pulling part, the first locking part is connected to the second locking part of the blocking unit to complete the locking of the blocking unit and the puncture unit. The connection step and the locking step are performed separately, which is convenient for the operator to operate and the formed structure is also more stable.

[0055] 4. Different from the existing technology, the blocking unit includes at least two coupling parts, and the connecting part includes two snap structures, so the blocking unit and the connecting part form a two-point connection. At the same time, the second locking part provided on the blocking unit is connected to the first locking part, thereby forming three fixed points on the plane where the blocking unit is located. The coupling part and the second locking part form a triangular stable structure, which improves the connection stability between the blocking unit and the puncture unit and facilitates improving the service life of the blocking device.

[0056] 5. Different from the existing technology, the first locking part and the second locking part are connected to the puncture unit and the blocking unit respectively. Therefore, the first locking part and the second locking part are located on the puncture tube and the loading tube respectively during pre-installation. During the normal release process, there is no chance for the two to be locked in advance. The separate pre-installation is convenient for the operator's operation, the steps are clear, and it is not easy to cause surgical errors.

[0057] The embodiments of the present application can achieve other advantageous technical effects that are not listed one by one. These other technical effects may be partially described below; and they can be anticipated and understood by those skilled in the art after reading this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The above features and advantages of these embodiments and other features and advantages and the manner in which they are achieved will become more apparent and the embodiments of the present application can be better understood by referring to the following description in conjunction with the accompanying drawings, in which:

[0059] Figure 1a and 1b Schematic diagram of the overall structure of the blocking device of the present invention.

[0060] Figures 2a to 2d It is a schematic diagram of the guiding assembly of the connecting portion and the engaging member of the present invention, and a schematic diagram of the principle of the locking unit.

[0061] Figures 3a to 3c It is a schematic diagram of the structure of the delivery system of the present invention and a schematic diagram of the state of the foramen ovale before and after the implantation of the occluding device.

[0062] Figures 4a to 4e This is a schematic diagram of the process of releasing and implanting the occlusion device using the delivery system of the present invention.

[0063] Figures 5a to 5c This is another embodiment of the occluding device of the present invention.

[0064] The features indicated by the numbers in the accompanying drawings are as follows:

[0065] 1-Puncture unit, 11-Puncture part, 12-Connecting part, 121-Snap structure, 122-Guide, 13-Horizontal section, 2-Occluding unit, 21-Joint part, 22-Occluding membrane, 23-Stabilizing structure, 231-Support part, 232-Fitting part, 3-Locking unit, 31-First locking part, 311-Latch, 312-Anchoring claw, 313-Sheath, 32-Second locking part, 321-Lock, 33-Pulling part, 4-Delivery system, 41-Outer sheath, 42-Puncture tube, 421-Slit, 43-Loading tube, 44-Support rod, 45-Control part. Implementation Method

[0066] In the following description of the drawings and specific embodiments, details of one or more embodiments of the present application will be described. Other features, purposes and advantages of the present application will be clear from these descriptions, drawings and claims.

[0067] It should be understood that the illustrated and described embodiments are not limited in application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the accompanying drawings. The illustrated embodiments may be other embodiments; and can be implemented or executed in various ways. The examples are provided by way of explanation and not limitation of the disclosed embodiments. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the scope or spirit of the disclosure of the present application. For example, features illustrated or described as part of one embodiment can be used with another embodiment to still produce additional embodiments. Therefore, the present disclosure covers such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0068] Likewise, it is understood that the phrases and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "include," "comprising," or "having" and variations thereof herein is intended to encompass the items listed thereafter and their equivalents as well as additional items.

[0069] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the application.

[0070] In the present application, the term “proximal end” or “proximal side” refers to an end or side closer to a surgical operator, and “distal end” or “distal side” refers to an end or side farther from a surgical operator. Example

[0071] like Figure 1a and 1bAs shown, a blocking device according to an embodiment of the present application is illustrated, which at least includes a puncture unit 1, a blocking unit 2 and a locking unit 3, wherein one end of the puncture unit 1 is connected to the blocking unit 2, and the locking unit 3 includes a first locking portion 31 arranged at the other end of the puncture unit 1 and a second locking portion 32 arranged on the blocking unit 2, and the locking unit 3 is locked after the puncture unit 1 passes through the tissue to be closed, and the first locking portion 31 and the second locking portion 32 remain fixed or only move in one direction after being connected or in contact.

[0072] In the first embodiment, the puncture unit 1 includes a puncture portion 11 and a connecting portion 12, the first locking portion 31 is arranged at the distal end of the puncture portion 11, and the connecting portion 12 is arranged at the proximal end of the puncture portion 11. Figure 3a and 1b shown.

[0073] In the first embodiment, the puncture portion 11 and the connection portion 12 both have a preset shape, and after the blocking device is released, the connection portion 12 forms a certain angle with the proximal end of the puncture portion 11 .

[0074] In the first embodiment, the connecting portion 12 includes a snap-fit ​​structure 121 and a guide member 122, and the two are detachably connected. Figure 2a As shown; and, the blocking unit 2 includes a joint member 21, the guide member 122 is sleeved in the joint member 21, the joint member 21 is connected to the buckle structure 121 along the guide member 122; and, the joint member 21 moves along the guide member 122 until the joint member 21 partially covers the buckle structure 121, as shown Figure 2b Or as shown in 2c.

[0075] In the first embodiment, the joint member 21 is provided at the upper end portion of the blocking unit 2 ; and the guide member 122 is a flexible rope.

[0076] In the first embodiment, the buckle structure 121 is provided with a small hole, and the guide member 122 passes through the small hole during pre-assembly.

[0077] In the first embodiment, the locking unit 3 includes a pulling member 33, which passes through the second locking portion 32 during pre-installation; and the distal end of the pulling member 33 is closed, elliptical or circular, such as Figure 3a and 4d shown.

[0078] In the first embodiment, a delivery system 4 is further included. The delivery system 4 includes an outer sheath 41, a puncture tube 42 and a loading tube 43. The puncture unit 1 is pre-installed in the puncture tube 42, and the blocking unit 2 is pre-installed in the loading tube 43. Figure 3a shown.

[0079] In the first embodiment, the puncture tube 42 and the loading tube 43 are pre-installed in the outer sheath 41 ; and the distal end of the puncture tube 42 is sharp to facilitate puncturing tissue.

[0080] In this embodiment 1, the conveying system 4 also includes a support rod 44 arranged in the puncture tube 42, and the puncture unit 1 is arranged at the distal end of the support rod 44 when pre-installed; and the conveying system 4 also includes a control member 45, which is connected to the blocking unit 2, and the control member 45 can push or pull the blocking unit 2.

[0081] In the first embodiment, when the puncture tube 42 is retracted and enters the outer sheath 41 , the support rod 44 presses against the puncture unit 1 , and the puncture unit 1 restores its preset shape and is connected to the secondary septum and the primary septum.

[0082] In the first embodiment, the control member 45 is pulled so that the occluding unit 2 does not adhere to the foramen ovale tissue, and then the pulling member 33 is operated so that the first locking portion 31 passes through or connects to the second locking portion 32 to complete the locking, and then the control member 45 is gradually released so that the occluding unit 2 adheres to the right atrial surface.

[0083] In the first embodiment, the blocking unit 2 includes two joint members 21, such as Figure 1a and 3b As shown, the connection structure includes two guide members 122 ; and the engaging member 21 and the second locking portion 32 form a triangular stabilizing structure 23 .

[0084] In the first embodiment, the puncture tube 42 is provided with a slit 421 , which provides a space or path for the guide member 122 to enter the puncture tube 42 and the loading tube 43 ; and the guide member 122 is arranged in the loading tube 43 after passing through the slit 421 .

[0085] In the first embodiment, after the occlusion device is implanted, part of the puncture portion 11 passes through the secondary septal tissue and the primary septal tissue, and the occlusion unit 2 adheres to the right atrial surface of the foramen ovale tissue. Figure 3c As shown, the blocking unit 2 effectively prevents blood shunting between the left and right sides of the foramen ovale; and the locking unit 3 restricts the puncture unit 1 and the blocking unit 2 from separating.

[0086] In the first embodiment, the first locking portion 31 includes a latch 311, the second locking portion 32 includes a lock buckle 321, and the pulling member 33 is used to pull the latch 311 into the lock buckle 321; and the latch 311 passes through the lock buckle 321 in a one-way manner. Figure 1b and 2d shown.

[0087] In the first embodiment, the latching teeth 311 are oriented toward the ventricle after entering the lock buckle 321 .

[0088] In the first embodiment, the blocking unit 2 is disc-shaped; and the blocking unit 2 includes a blocking membrane 22 and a stabilizing structure 23, such as Figure 1a As shown, the stabilizing structure 23 is a shape memory alloy.

[0089] In the first embodiment, the stabilizing structure 23 is substantially pear-shaped.

[0090] In the first embodiment, the stabilizing structure 23 is provided on the outer ring of the blocking unit 2 .

[0091] In the first embodiment, the second locking portion 32 is provided at the lower portion of the center of the blocking unit 2 ; the second locking portion 32 is provided on the center line of the blocking unit 2 .

[0092] In the first embodiment, the second locking portion 32 is connected to the blocking membrane 22 .

[0093] The exemplary operation process of the blocking device of the first embodiment is as follows:

[0094] First, the puncture tube 42 is operated to puncture the secondary septal tissue and the primary septal tissue. Figure 4a and 4b As shown,

[0095] Second, retract the puncture tube 42 and support the puncture unit 1 against the support rod 44 so that the puncture portion 11 and the connecting portion 12 are exposed inside the heart. Figure 4c As shown;

[0096] Third, the blocking unit 2 is moved toward the distal end, and the engaging member 21 is connected to the buckle structure 121 along the guiding member 122;

[0097] Fourth, release the occlusion unit 2 from the right atrium but do not make it fit with the right atrium surface, operate the pulling member 33 to hook the latch 311, pull the pulling member 33 so that the latch 311 enters the lock 321, as shown in FIG. Figure 4d As shown, the connection between the blocking unit 2 and the right atrial surface is released at the same time;

[0098] Finally, the delivery system 4 is retrieved and the implantation is completed. Figure 4e shown. Example

[0099] The difference from the first embodiment is that the structure of the locking unit 3 is different from the structure of the stabilizing structure 23 .

[0100] The following describes in detail the composition and connection of the various components in this embodiment with reference to the accompanying drawings:

[0101] During PFO interventional treatment, a closure device is used, which includes at least a puncture unit 1, a closure unit 2, and a locking unit 3. One end of the puncture unit 1 is connected to the closure unit 2. The locking unit 3 includes a first locking portion 31 provided at the other end of the puncture unit 1 and a second locking portion 32 provided on the closure unit 2. The locking unit 3 is locked after the puncture unit 1 passes through the tissue to be closed. The first locking portion 31 and the second locking portion 32 remain fixed after being connected or in contact. Figures 5a to 5c shown.

[0102] In the second embodiment, a horizontal section 13 is provided at the connection between the puncture portion 11 and the connection portion 12. The horizontal section 13 prevents the puncture portion 11 from tearing the secondary septal tissue and enlarging the puncture point.

[0103] In the second embodiment, the first locking portion 31 includes an anchoring claw 312 and a sheath 313. The sheath 313 is sleeved outside the anchoring claw 312. The pulling member 33 is used to pull the sheath 313 through the second locking portion 32. Furthermore, the pulling member 33 is continuously operated to pull the sheath 313, and the sheath 313 is separated from the anchoring claw 312. Figure 5b and 5c As shown, the anchoring claw 312 is connected to the blocking unit 2 , and the second locking portion 32 restricts the anchoring claw 312 to the left side of the blocking unit 2 ; and the sheath 313 is recovered into the conveying system 4 by the pulling member 33 .

[0104] In the second embodiment, the stabilizing structure 23 includes a support member 231 radiating from the center and a fitting member 232 connected to the support member 231. The fitting member 232 guides the occluding membrane 22 to fit toward the tissue to be closed. In addition, the periphery of the occluding unit 2 is completely unsealed, facilitating a secondary interventional procedure.

[0105] In the second embodiment, the support member 231 diverges radially, and the fitting member 232 diverges toward the periphery.

[0106] In the second embodiment, the fitting 232 is flexible, and the metal density of the fitting 232 is less than the metal density of the support 231; and if a secondary interventional surgery is performed, the support 231 and the fitting 232 can limit the position of the puncture tube.

[0107] The foregoing description of several embodiments of the present application has been presented for illustrative purposes. It is not intended to be exhaustive or to limit the present application to the precise configurations, configurations, and / or steps disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. It is intended that the scope of the invention and all equivalents thereof be defined by the appended claims.

Claims

1. A blocking device, characterized in that: At least it includes a puncture unit, a blocking unit and a locking unit, one end of the puncture unit is connected to the blocking unit, the locking unit includes a first locking part arranged at the other end of the puncture unit and a second locking part arranged on the blocking unit, and the locking unit is locked after the puncture unit passes through the tissue to be closed, and the first locking part and the second locking part remain fixed or only move in one direction after connection or contact, the puncture unit includes a puncture part and a connecting part, the first locking part is arranged at the distal end of the puncture part, the connecting part is arranged at the proximal end of the puncture part, the connecting part includes a snap structure and a guide, and the two are detachably connected; and the blocking unit includes a coupling part, the guide part is sleeved in the coupling part, and the coupling part is moved along the guide and the clip. The locking unit is connected with a buckle structure, and the pulling member passes through the second locking part when pre-installed; the conveying system also includes an outer sheath, a puncture tube and a loading tube, the puncture unit is pre-installed in the puncture tube, and the blocking unit is pre-installed in the loading tube. The conveying system also includes a support rod arranged in the puncture tube, and the puncture unit is arranged at the distal end of the support rod when pre-installed; and the conveying system also includes a control member, which is connected to the blocking unit, and the control member can push or pull the blocking unit, and the blocking unit includes at least two of the coupling members; and the coupling member and the second locking part form a triangular stable structure, the puncture tube is provided with a slit; and the guide member is arranged in the loading tube after passing through the slit.

2. The blocking device according to claim 1, characterized in that: After the occluding device is implanted, part of the puncture portion passes through two pieces of tissue to be closed, and the occluding unit adheres to one side of the tissue to be closed; and the locking unit restricts the puncture unit and the occluding unit from separating.

3. The blocking device according to claim 1, characterized in that: The first locking portion includes a latching tooth, the second locking portion includes a lock buckle, and the pulling member is used to pull the latching tooth into the lock buckle; and the latching tooth passes through the lock buckle in a one-way manner.

4. The blocking device according to claim 1, characterized in that: The first locking portion includes an anchoring claw and a sheath, wherein the sheath is sleeved outside the anchoring claw, and the pulling member is used to pull the sheath through the second locking portion; and the pulling member is continuously operated to pull the sheath, and the sheath is separated from the anchoring claw.

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