CN104720854B - Sectioned degradable plugging device - Google Patents

Abstract

The invention provides a split-type degradable occluder, which includes a mesh support, the mesh support is woven from degradable silk threads, and the mesh support includes an upper plate, a lower plate and a waist connecting the upper plate and the lower plate. The upper plate is sewn with an upper diaphragm covering the upper plate, the lower plate is sewn with a lower diaphragm covering the lower plate, and the waist is provided with a blocking film that intercepts the waist laterally. The upper diaphragm, the lower diaphragm and the blocking film are made of degradable materials. Made, the inner core connecting rod is set in the middle of the lower plate, the inner core connecting rod is connected with the lower diaphragm, and the middle of the upper plate is provided with a clamping structure, the inner core connecting rod can pass through the flow blocking film and be stuck in the clamping structure superior. The split-flap degradable occluder is aimed at polymer degradable occlusion devices. It uses structural innovations to compensate for a series of problems such as resilience and fixation stability caused by poor mechanical properties of polymer materials. And other issues.

Description

Split-valve degradable occluder

technical field

The invention relates to a split-valve degradable occluder.

Background technique

For congenital heart disease, the commonly used clinical occluder is the mushroom umbrella occluder. The main working principle is to stabilize the flow-blocking membrane at the lesion position with metal as the bracket, wait for the thrombus to be adsorbed, and finally endothelialize the occluder. Fully integrated with surrounding tissues. However, the implantation of the metal occluder will cause the following problems: 1) It will remain in the human body for life, which will affect the possible follow-up surgical treatment; 2) Artifacts will appear in MRI and CT examinations; 3) It may change the heart The geometric configuration can cause adverse reactions such as thrombosis and acute myocardial infarction; 4) NiTi mesh scaffolds will slowly release Ni ions in the tissue.

Therefore, if can develop a kind of occluding device that can degrade completely after playing fixation effect, can overcome the weakness above the metal occluder, will open up a new world for the treatment of congenital heart disease. However, the easily degradable polymer material is brittle, and its mechanical properties are not as good as metal, so the plugging device made of polymer material is another bottleneck in terms of fixing performance.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a split-type degradable occluder to solve the problem of poor fixation performance of the occluder made of easily degradable materials in the prior art.

In order to achieve the above purpose and other related purposes, the present invention provides a split degradable occluder, which includes a mesh support, the mesh support is woven from degradable silk threads, and the mesh support includes an upper plate, a lower plate and The waist connecting the upper plate and the lower plate, the upper plate is sewn with an upper diaphragm covering the upper plate, the lower plate is sewn with a lower diaphragm covering the lower plate, and the waist is provided with a flow-blocking film that intercepts the waist laterally, the upper diaphragm, the lower The diaphragm and flow blocking film are made of degradable materials. There is an inner core connecting rod in the middle of the lower plate. The inner core connecting rod is connected with the lower diaphragm. There is a clamping structure in the middle of the upper plate. The over-restriction film is stuck on the clamping structure.

Preferably, the material of the degradable thread used in the mesh stent is polylactic acid, polycaprolactone, polyglycolic acid, polydioxanone or polyhydroxybutyric acid.

Preferably, the material of the upper diaphragm, the lower diaphragm and the blocking film is polylactic acid, polylactic acid-glycolic acid copolymer or polycaprolactone.

Preferably, the upper diaphragm, the lower diaphragm or the blocking membrane are sewn together with the mesh support through degradable sutures.

Further preferably, the material of the suture is dioxane.

Further preferably, a developing substance is mixed in the suture.

Preferably, a developing substance is mixed in the connecting rod of the inner core.

Preferably, the diameter of the upper disc is 6-16mm larger than the diameter of the waist, and the diameter of the lower disc is 4-12mm larger than the diameter of the waist.

Preferably, the end of the inner core connecting rod located outside the lower panel is provided with a radially penetrated first safety line perforation, and the end surface of the inner core connecting rod located outside the lower panel is provided with a push rod connecting hole extending axially inward .

Preferably, the middle of the choke film is provided with a plurality of leaflet-shaped choke diaphragms that can be turned up, and the multi-piece choke diaphragms are distributed along the circumferential direction of the center of the choke film, and the energy of the multi-piece choke diaphragms The turned-up ends partially overlap each other.

Further preferably, the end of the inner core connecting rod facing the upper disk surface is provided with a locking protrusion, and the diameter of the locking protrusion is larger than the diameter of the inner core connecting rod; after the inner core connecting rod passes through the center surrounded by a plurality of choke diaphragms, , the clamping protrusion is clamped on the clamping structure on the upper disk surface.

Further preferably, the blocking diaphragm can be turned up toward the disk surface, and the locking structure is composed of a plurality of leaflet-shaped locking diaphragms that can be turned up in the center of the upper diaphragm, and the plurality of locking diaphragms are along the In the circumferential distribution of the center of the upper plate, the turned-up ends of the multiple clamping diaphragms are partially overlapped; after the inner core connecting rod passes through the center surrounded by multiple blocking diaphragms, it passes through the In the center surrounded by the bit diaphragm, multiple snap bit diaphragms clamp the snap bit protrusion.

More preferably, the choke diaphragm can be turned up toward the upper disk surface, and the locking structure is a round hole located on the upper end surface of the upper disk surface; after the inner core connecting rod passes through the center surrounded by a plurality of choke diaphragms, Then pass through the round hole, and the round hole will block the locking protrusion.

Further preferably, the flow blocking diaphragm can be turned up towards the direction of the lower disk, and the locking structure includes a locking column located in the center of the upper panel, the locking column is connected with the upper diaphragm, and the locking column faces the end surface of the lower panel. An insertion port extending inward in the axial direction, the port of the insertion port is provided with a first flange extending radially inward, and the end of the clamping cylinder facing the lower disk surface is also provided with a second flange extending radially outward Flange; the connecting rod of the inner core passes through the center surrounded by multiple choke diaphragms, and then is inserted into the insertion port, the first flange clamps the locking protrusion, and the connecting rod of the inner core pulls the locking column to pass through the choking After the diaphragm, the choke diaphragm clamps the second flange.

Further preferably, the flow blocking diaphragm can be turned up toward the upper disk surface, and the locking structure includes a locking column located at the center of the upper panel surface, the locking column is connected to the upper diaphragm, and a locking column is provided on the end surface of the lower panel surface. The insertion port extending inward in the axial direction, the peripheral surface of the insertion port is provided with a notch extending in the circumferential direction; the connecting rod of the inner core passes through the center surrounded by a plurality of blocking diaphragms, and then is inserted into the insertion port, the inner core After the connecting rod is rotated, the locking protrusion is locked into the notch.

As mentioned above, the split-valve degradable occluder of the present invention has the following beneficial effects:

The split-flap degradable occluder is aimed at polymer degradable occlusion devices. It uses structural innovations to compensate for a series of problems such as resilience and fixation stability caused by poor mechanical properties of polymer materials. And other issues.

Description of drawings

Fig. 1a is a schematic structural view of the first embodiment of the split-valve degradable occluder of the present invention.

Fig. 1b is a top view of the locking structure of the split-valve degradable occluder shown in Fig. 1a.

Fig. 1c is a top view of the flow blocking membrane of the split-valve degradable occluder shown in Fig. 1a.

Fig. 2a is a schematic structural view of the second embodiment of the split-valve degradable occluder of the present invention.

Fig. 2b is a top view of the split-valve degradable occluder shown in Fig. 2a.

Fig. 2c is a top view of the flow blocking membrane of the split-valve degradable occluder shown in Fig. 2a.

Fig. 3a is a schematic structural view of the third embodiment of the split-valve degradable occluder of the present invention.

Fig. 3b is a top view of the split-valve degradable occluder shown in Fig. 3a.

Fig. 4a is a schematic structural diagram of the fourth embodiment of the split-valve degradable occluder of the present invention.

Fig. 4b is a partial sectional view along the line A-A of the clamping post of the split-valve degradable occluder shown in Fig. 4a.

Fig. 4c is a top view of the flow blocking membrane of the split-valve degradable occluder shown in Fig. 4a.

Fig. 5 is a schematic diagram of the split-valve degradable occluder of the present invention located in the delivery sheath.

Fig. 6 is a schematic diagram showing the connection between the split-valve degradable occluder and the pushing rod of the present invention.

Component designation description

1 mesh stand

11 Upper surface

12 lower panel

13 waist

2 upper diaphragm

3 lower diaphragm

4 Barrier film

41 Choke diaphragm

5 Inner core connecting rod

51 card position protrusion

52 The first insurance line perforation

53 Push rod connecting hole

54 middle slot

6 slot structure

61 snap post

62 Insertion port

63 First flange

64 Second flange

65 notches

66 position diaphragm

67 round hole

7 stitches

8 Delivery sheath

9 push lever

91 push rod head

92 Second safety wire perforation

10 guide wire

101 insurance line

detailed description

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

See Figures 1 through 6. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

As shown in Figures 1 to 6, the present invention provides a split-valve degradable occluder, which includes a mesh stent 1 woven from degradable silk threads, and the mesh stent 1 includes an upper plate 11 , the lower panel 12 and the waist 13 connecting the upper panel 11 and the lower panel 12, the upper panel 11 is sewn with the upper diaphragm 2 covering the upper panel 11, the lower panel 12 is sewn with the lower diaphragm 3 covering the lower panel 12, and the waist 13 There is a flow blocking film 4 that intercepts the waist 13 laterally. The upper diaphragm 2, the lower diaphragm 3 and the flow blocking film 4 are made of degradable materials. It is connected with the lower diaphragm 3 , and there is a locking structure 6 in the middle of the upper plate surface 11 , and the inner core connecting rod 5 can pass through the flow blocking film 4 and be locked on the locking structure 6 .

The upper diaphragm 2 is sewn together with the upper plate surface 11, the lower diaphragm 3 is sewn together with the lower plate surface 12, the inner core connecting rod 5 is connected with the lower diaphragm 3, and the upper diaphragm 2 drives the upper diaphragm 2 when the blood flow squeezes the upper diaphragm 2. The disk surface 11 is sunken, and the inner core connecting rod 5 passes through the flow blocking membrane 4 and is stuck on the locking structure 6, so that the occluder is stably fixed on the defect site. The split-flap degradable occluder compensates for a series of problems such as poor resilience and poor fixation stability caused by poor mechanical properties of degradable polymer materials through structural innovation.

The material of the degradable thread used in the above-mentioned mesh stent 1 is polylactic acid (PLA), polycaprolactone (PCL), polyglycolic acid (PGA), polydioxanone (PDO) or polyhydroxybutyric acid ( PHB), etc.; the material of the upper diaphragm 2, the lower diaphragm 3 and the flow blocking film 4 is polylactic acid (PLLA), polylactic acid-glycolic acid copolymer (PLGA) or polycaprolactone (PCL).

Wherein, the upper diaphragm 2, the lower diaphragm 3 or the flow blocking membrane 4 are sewn together with the mesh support 1 through a degradable suture 7, and the material of the suture 7 is dioxane (PDO).

The suture 7 and the inner core connecting rod 5 are also mixed with a developing substance, which can help the occluder realize the developing function, has the advantage of convenient observation, and can judge the release form and exact position of the occluder more quickly.

In the above structure, the optimal size of the upper disk surface 11, the lower disk surface 12 and the waist portion 13 is: the diameter of the upper disk surface 11 is 6-16 mm larger than the diameter of the waist portion 13, and the diameter of the lower disk surface 12 is 4-12 mm larger than the diameter of the waist portion 13.

As shown in Fig. 1c, Fig. 2c, Fig. 3b, and Fig. 4c, a plurality of leaflet-shaped choke diaphragms 41 that can be turned up are arranged in the middle of the choke film 4, and the choke diaphragm 41 is arranged along the choke membrane. The circumferential distribution of the center of 4, one end part that can turn up of a plurality of choke diaphragms 41 overlaps together. The overlapping area of the plurality of choke diaphragms 41 can be selected according to actual needs, as shown in Fig. 1c, Fig. 2c, Fig. 3b, and Fig. 4c.

As shown in Figure 1a, Figure 2a, Figure 3a, and Figure 4a, the end of the inner core connecting rod 5 facing the upper disk surface 11 is provided with a locking protrusion 51, and the diameter of the locking protrusion 51 is greater than the diameter of the inner core connecting rod 5; After the core connecting rod 5 passes through the center surrounded by a plurality of choke diaphragms 41 , the locking protrusion 51 is locked on the locking structure 6 of the upper disk surface 11 .

The first embodiment of the split-valve degradable occluder is shown in Fig. 1a to Fig. 1c. The blocking diaphragm 41 can be turned up toward the direction of the upper disk surface 11, and the locking structure 6 is composed of a plurality of flap-shaped locking diaphragms 66 that can be turned up in the center of the upper diaphragm 2, and the plurality of locking diaphragms 66 Distributed along the circumferential direction of the center of the upper disk surface 11, the turned-up ends of the plurality of clamping diaphragms 66 overlap; after the inner core connecting rod 5 passes through the center surrounded by the plurality of blocking diaphragms 41, Passing through the center surrounded by a plurality of locking diaphragms 66, the plurality of locking diaphragms 66 block the locking protrusion 51, preventing the inner core connecting rod 5 from retreating, so that the inner core connecting rod 5 is stuck in the locking structure 6, the occluder can be stably fixed at the defect site.

The second embodiment of the split-valve degradable occluder is shown in Fig. 2a to Fig. 2c. The choke diaphragm 41 can be turned up toward the upper disk surface 11, and the locking structure 6 is a round hole 67 located on the upper end surface of the upper disk surface 11; the inner core connecting rod 5 passes through the center surrounded by a plurality of choke diaphragms 41 Finally, through the round hole 67, the round hole 67 blocks the locking protrusion 51, preventing the inner core connecting rod 5 from retreating, so that the inner core connecting rod 5 is stuck on the locking structure 6, and the occluder can stably fixed at the defect site. The end surface of the above-mentioned inner core connecting rod 5 facing the upper disk surface 11 is also provided with a middle groove 54. The design of the middle groove 54 can make the inner core connecting rod 5 snap into the round hole 67, and the locking protrusion 51 has a movable space in the radial direction. , so that the inner core connecting rod 5 can be snapped into the circular hole 67 more smoothly.

The third embodiment of the split-valve degradable occluder is shown in Fig. 3a to Fig. 3b. The flow blocking diaphragm 41 can be turned up towards the direction of the lower disk surface 12. The locking structure 6 includes a locking column 61 located at the center of the upper panel surface 11. The locking column 61 is connected with the upper diaphragm 2, and the locking column 61 faces the lower panel surface 12. The end surface of the end face is provided with an insertion port 62 extending inward in the axial direction, the port of the insertion port 62 is provided with a first flange 63 extending radially inward, and the end of the clamping column 61 facing the lower disk surface 12 is also provided with a The second flange 64 extending radially outwards; after the inner core connecting rod 5 passes through the center surrounded by a plurality of choke diaphragms 41, it is then inserted into the insertion port 62, and the first flange 63 pushes the locking protrusion 51 stuck, so that the inner core connecting rod 5 and the clamping post 61 are stuck; after the inner core connecting rod 5 pulls the clamping post 61 and passes through the blocking film 4, the blocking diaphragm 41 blocks the second flange 64, Prevent the inner core connecting rod 5 from receding in the direction of the upper disk surface 11, so that the occluder can be stably fixed on the defect site. The end surface of the above-mentioned inner core connecting rod 5 facing the upper disk surface 11 is also provided with a middle groove 54, the design of the middle groove 54 can make the inner core connecting rod 5 snap into the insertion opening 62, and the locking protrusion 51 has a movable space in the radial direction , so that the inner core connecting rod 5 can be snapped into the insertion opening 62 more smoothly.

Figure 4a to Figure 4c show the fourth embodiment of the split-valve degradable occluder. The flow blocking diaphragm 41 can be turned up towards the direction of the upper disk surface 11, and the locking structure 6 includes a locking column 61 located at the center of the upper panel surface 11. The locking column 61 is connected with the upper diaphragm 2, and the locking column 61 faces the bottom of the lower disk surface 12. The end face is provided with an insertion port 62 extending inward in the axial direction, and the peripheral surface of the insertion port 62 is provided with a notch 65 extending in the circumferential direction; After that, it is inserted into the insertion port 62. After the inner core connecting rod 5 rotates, the locking protrusion 51 snaps into the notch 65, which prevents the retreat of the inner core connecting rod 5, and makes the inner core connecting rod 5 stuck in the locking structure 6. On the other hand, the occluder can be stably fixed at the defect site.

As shown in Figure 6, the end of the inner core connecting rod 5 located outside the lower disk surface 12 is provided with a first insurance line perforation 52 penetrating in the radial direction, and the end surface of the inner core connecting rod 5 located outside the lower disk surface 12 is provided with an axial The push rod connection hole 53 extending inward; the push rod 9 is provided with a push rod head 91 matched with the push rod connection hole 53 and a second safety wire perforation 92 penetrating in the radial direction. When the split type degradable occluder is connected with the push rod 9, the push rod head 91 is inserted into the push rod connection hole 53, the safety wire 101 passes through the first safety wire perforation 52, the second safety wire perforation 92, and Connect with guide wire 10. In order to facilitate the fastening and rotation of the push rod 9 and the inner core connecting rod 5, the radial section of the push rod head 91 can be circular, triangular or outer hexagonal, etc., and the push rod connecting hole 53 is arranged to be aligned with the push rod head. 91 corresponding shapes.

The method for using the split-valve degradable occluder includes the following steps:

1) The occluder is connected to the push rod 9; as shown in Figure 6, the push rod head 91 is inserted into the push rod connecting hole 53, and the safety wire 101 passes through the first safety wire perforation 52 and the second safety wire perforation 92, And be connected with guide wire 10;

2) Pull the occluder together with the guide wire 10 into the delivery sheath 8, as shown in Figure 5;

3) sending the occluder to the lesion position through the delivery sheath 8;

4) Release the upper plate surface 11 of the occluder;

5) releasing the waist 13 of the occluder;

6) Wait for the blood pressure to press the upper surface 11 of the occluder to the waist 13;

7) release the lower plate surface 12 of the occluder;

8) Fasten the inner core connecting rod 5 of the occluder with the locking structure 6 of the upper panel surface 11, wherein corresponding to different locking structures 6, there are different buckling methods;

9) Finally, the push rod 9 is separated from the occluder, that is, the installation of the occluder is completed.

To sum up, the split-valve degradable occluder of the present invention is aimed at polymer degradable occlusion devices, and it uses structural innovations to compensate for a series of problems such as poor mechanical properties of polymer materials. Resilience, fixed stability and other issues. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (14)

1. A split type degradable occluder is characterized in that: it comprises a mesh support (1), and the mesh support (1) is woven by degradable silk thread, and the mesh support (1) Comprising an upper panel (11), a lower panel (12) and a waist (13) connecting the upper panel (11) and the lower panel (12), the upper panel (11) is sewn with a seam covering the upper panel (11) The upper diaphragm (2) of the lower plate (12) is sewn with a lower diaphragm (3) covering the lower plate (12), and the waist (13) is provided with a flow blocking film ( 4), the middle of the choke film (4) is provided with a plurality of leaflet-shaped choke diaphragms (41) that can be turned up, and the plurality of choke diaphragms (41) are arranged along the (4) in the circumferential distribution of the center, one end part that can be turned up of the plurality of choke diaphragms (41) overlaps together; the upper diaphragm (2), the lower diaphragm (3) and the choke film ( 4) Made of degradable materials, the middle of the lower plate surface (12) is provided with an inner core connecting rod (5), and the inner core connecting rod (5) is connected with the lower diaphragm (3), and the upper A clamping structure (6) is provided in the middle of the disk surface (11), and the inner core connecting rod (5) can pass through the flow blocking film (4) and be clamped on the clamping structure (6). 2. The split type degradable occluder according to claim 1, characterized in that: the material of the degradable thread used in the mesh support (1) is polylactic acid, polycaprolactone, polyglycolic acid, Polydioxanone or polyhydroxybutyrate. 3. The split-valve degradable occluder according to claim 1, characterized in that: the materials of the upper diaphragm (2), the lower diaphragm (3) and the blocking membrane (4) are polylactic acid, polylactic acid - glycolic acid copolymer or polycaprolactone. 4. The split-valve degradable occluder according to claim 1, characterized in that: the upper diaphragm (2), the lower diaphragm (3) or the flow blocking membrane (4) are passed through degradable sutures (7) Sewn together with the mesh bracket (1). 5. The split-valve degradable occluder according to claim 4, characterized in that: the material of the suture (7) is dioxane. 6. The split-valve degradable occluder according to claim 4, characterized in that: the suture (7) is mixed with a developing substance. 7. The split-valve degradable occluder according to claim 1, characterized in that: the connecting rod (5) of the inner core is mixed with a developing substance. 8. The split-flap degradable occluder according to claim 1, characterized in that: the diameter of the upper disc surface (11) is 6-16 mm larger than the diameter of the waist (13), and the lower disc surface (12) The diameter is 4～12mm larger than the diameter of the waist (13). 9. The split-flap degradable occluder according to claim 1, characterized in that: the end of the inner core connecting rod (5) located outside the lower disk surface (12) is provided with a radially penetrating The first safety wire is perforated (52), and the end surface of the inner core connecting rod (5) located outside the lower disk surface (12) is provided with a push rod connecting hole (53) extending axially inward. 10. The split-flap degradable occluder according to claim 1, characterized in that: the end of the inner core connecting rod (5) facing the upper disk surface (11) is provided with a locking protrusion (51), so The diameter of the clamping protrusion (51) is greater than the diameter of the inner core connecting rod (5); after the inner core connecting rod (5) passes through the center surrounded by the plurality of choke diaphragms (41), The locking protrusion (51) is locked on the locking structure (6) of the upper disk surface (11). 11. The split-flap degradable occluder according to claim 10, characterized in that: the flow blocking diaphragm (41) can be turned up toward the direction of the upper disk surface (11), and the locking structure (6) It consists of a plurality of leaflet-shaped retaining diaphragms (66) that can be turned up at the center of the upper diaphragm (2), and the plurality of retaining diaphragms (66) are positioned along the upper disk surface The circumferential distribution of the center of (11), the one end that can be turned up of the plurality of clamping diaphragms (66) is partially overlapped; the inner core connecting rod (5) passes through the plurality of flow blocking films After the center surrounded by the sheet (41), it passes through the center surrounded by a plurality of clamping membranes (66), and the multiple clamping membranes (66) clamp the clamping protrusion (51). 12. The split-flap degradable occluder according to claim 10, characterized in that: the flow blocking diaphragm (41) can be turned up toward the direction of the upper disk surface (11), and the locking structure (6) is a circular hole (67) located on the upper end surface of the upper disk surface (11); after the inner core connecting rod (5) passes through the center surrounded by the plurality of choke diaphragms (41), , and then pass through the circular hole (67), and the circular hole (67) clamps the locking protrusion (51). 13. The split-flap degradable occluder according to claim 10, characterized in that: the flow-blocking diaphragm (41) can be turned up toward the direction of the lower plate surface (12), and the locking structure (6) comprising a clamping column (61) located at the center of the upper disk surface (11), the clamping column (61) is connected to the upper diaphragm (2), and the clamping column (61) faces downward The end surface of the disc surface (12) is provided with an insertion port (62) extending axially inward, and the port of the insertion port (62) is provided with a first flange (63) extending radially inward. The end of the clamping post (61) facing the lower disk surface (12) is also provided with a second flange (64) extending radially outward; the inner core connecting rod (5) passes through the multi-piece flow blocking After the center surrounded by the diaphragm (41), it is inserted into the insertion port (62), the first flange (63) clamps the locking protrusion (51), and the inner core connecting rod ( 5) After pulling the clamping post (61) through the choke film (4), the choke film (41) clamps the second flange (64). 14. The split-flap degradable occluder according to claim 10, characterized in that: the flow blocking diaphragm (41) can be turned up toward the direction of the upper disk surface (11), and the locking structure (6) comprising a clamping column (61) located at the center of the upper disk surface (11), the clamping column (61) is connected to the upper diaphragm (2), and the clamping column (61) faces downward The end surface of the disc surface (12) is provided with an insertion port (62) extending axially inward, and the peripheral surface of the insertion port (62) is provided with a notch (65) extending in the circumferential direction; the inner core is connected After the rod (5) passes through the center surrounded by the plurality of blocking diaphragms (41), it is inserted into the insertion port (62), and after the inner core connecting rod (5) rotates, the locking The protrusion (51) snaps into said recess (65).