CN116407194A - Blocking device - Google Patents

Abstract

The present invention relates to the technical field of medical devices, and provides an occlusion device, which includes a fixing part for fixing the occlusion device at a predetermined position, a sealing part that acts as a seal, and a connecting part connecting the fixing part and the sealing part, wherein , the fixed part includes a number of support rods, the support rods include a connecting section located at the proximal end, and a supporting section formed by radially extending from the proximal end after being connected, the supporting section is provided with a restricting structure, and the restricting structure prevents adjacent The support segments are close to each other. The present invention prevents adjacent support segments from approaching each other by setting a restricting structure on the support segments, and can fully pull the support segments apart when the support segments are everted, avoiding the occurrence of entanglement of the support rods of the fixing part, thereby making the fixing Fully expanded, and will not affect the occlusion device into and out of the sheath.

Description

Blocking device

technical field

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

Background technique

In patients with non-valvular atrial fibrillation, 90% of strokes caused by atrial fibrillation originate from the left atrial appendage. Clinical data have shown that resection of the left atrial appendage during cardiac surgery can reduce the incidence of stroke in patients with atrial fibrillation, which suggests the harm of the left atrial appendage in thromboembolism. Since the left atrial appendage is the nest of thrombus, blocking the opening of the left atrial appendage can eliminate the basis of thrombus formation in the left atrial appendage. Usually, occlusion of the left atrial appendage with a left atrial appendage occluder is an effective way to prevent stroke caused by atrial fibrillation.

In order to effectively block the left atrial appendage, a left atrial appendage occluder needs to be implanted in the left atrial appendage for a long time to achieve the blocking effect. At present, left atrial appendage occluders generally include a fixed part fixed at a predetermined position and a sealing part that acts as a seal. When released, the fixed part turns outwards. When it is in the process of eversion, the trunk of the fixed part tends to tangle with each other. As a result, the trunk cannot be fully turned out, thereby affecting the degree of expansion of the fixed part of the left atrial appendage occluder.

Contents of the invention

Based on this, the present invention provides an occlusion device to solve the problem that the main trunk of the fixed part of the existing left atrial appendage occluder is easily entangled with each other during the process of eversion, resulting in the inability of the main trunk to be fully everted, thereby affecting the left atrial appendage. The problem of the expansion degree of the fixed part of the occluder.

In order to solve the above technical problems, the present invention proposes a blocking device, including a fixing part for fixing the blocking device at a predetermined position, a sealing part connected with the fixing part, and the fixing part includes a plurality of support rods , the support rod includes a connecting section located at the proximal end, and a supporting section connected to the connecting section, the supporting section is provided with a restricting structure, and the restricting structure prevents the adjacent supporting section from close to each other.

In one embodiment, the connecting sections of at least two support rods intersect at the distal end of the connection between the fixing part and the sealing part.

In one of the embodiments, the restricting structure includes a connecting rod, one end of the connecting rod resists or fixes the inner side of the supporting section, and the other end connects the connecting section or the fixing part and the sealing part. Junction.

In one of the embodiments, the blocking device further includes a stopper, the stopper is an annular structure, and the annular structure is sheathed at the connection between the fixing part and the sealing part and/or the On the outside of the connecting section, the annular structure is movable in the axial direction, one end of the connecting rod resists or fixes the inner side of the supporting section, and the other end is connected to the annular structure.

In one of the embodiments, the restricting structure includes a membrane, and the membrane is nested on the support rod.

In one of the embodiments, the restricting structure includes a connecting piece, and the connecting piece connects two adjacent supporting segments.

In one embodiment, the connecting member is an elastic member, two ends of the elastic member are connected to two adjacent support segments, and the elastic member is in a compressed state and stretches apart the two adjacent support segments.

In one embodiment, the connecting member is a telescopic rod, two ends of the telescopic rod are connected to two adjacent support segments, and the telescopic rod stretches the two adjacent support segments.

In one embodiment, the telescopic rod includes an inner tube and an outer tube that can slide relatively, the outer tube is sheathed outside the inner tube, and the part of the inner tube inside the outer tube is provided with a second A locator, the outer tube is provided with a second locator at a position corresponding to the first locator, the inner tube and the outer tube are relatively far away when the support section is everted, and the first locator and the outer tube are relatively far apart. When the second locating member is aligned, it is locked to limit the relative sliding of the inner tube and the outer tube.

In one of the embodiments, one of the first positioning member and the second positioning member is an elastic protrusion, and the other is a groove or a through hole, and the elastic protrusion and the groove or the When the through holes are aligned, the elastic protrusions are engaged in the grooves or the through holes.

In one of the embodiments, the connecting member is an engaging rod, and the connecting rod connects two adjacent supporting segments at different distances from the distal ends of the supporting rods.

In one embodiment, the connecting member is two connecting rods, both connecting rods are connected to two adjacent supporting segments, and the two connecting rods are connected in rotation or crossed.

In one of the embodiments, one end of the connecting rod is slidably connected with the supporting section.

In one of the embodiments, the connecting parts are four connecting rods, and the four connecting rods are connected end to end in turn, and one opposite two intersection points of the four connecting rods connected end to end connect two adjacent supporting segments , the other relative two intersections can approach or move away from each other in the axial direction.

Compared with the prior art, the blocking device provided by the present invention has the following beneficial effects:

In the occlusion device provided by the present invention, the support rod includes a connecting section located at the proximal end, and a supporting section connected with the connecting section, and a restricting structure is provided on the supporting section to prevent adjacent supporting sections from interacting with each other. The proximity prevents the supporting rods from being entangled with each other during the valgus process of the fixing part, resulting in the inability of the supporting section to fully valgus, thereby ensuring the degree of expansion of the fixing part of the occlusion device.

Description of drawings

Fig. 1 is a schematic structural view of the compressed state of the blocking device provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of the expanded state of the occlusion device provided by Embodiment 1 of the present invention;

Fig. 3 is a working schematic diagram of the blocking device provided by Embodiment 1 of the present invention;

Fig. 4 is a structural schematic diagram 1 of the blocking device provided by Embodiment 2 of the present invention;

Fig. 5 is a second structural schematic diagram of the blocking device provided by the second embodiment of the present invention;

Fig. 6 is a schematic structural diagram 1 of the blocking device provided by Embodiment 3 of the present invention;

Figure 7 is an enlarged view of A in Figure 6;

Fig. 8 is the second structural schematic diagram of the blocking device provided by the third embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a blocking device provided in Embodiment 4 of the present invention;

FIG. 10 is a schematic structural view of the blocking device provided in Embodiment 5 of the present invention;

11 is a schematic diagram of the internal structure of the telescopic rod of the blocking device provided in Embodiment 5 of the present invention;

Fig. 12 is a schematic structural view of the blocking device provided in Embodiment 6 of the present invention;

Fig. 13 is a schematic structural view of the blocking device provided by Embodiment 7 of the present invention;

Figure 14 is an enlarged view of B in Figure 13;

Fig. 15 is a schematic structural diagram of a blocking device provided in Embodiment 8 of the present invention.

Explanation of the accompanying drawings:

10. Blocking device; 11. Fixed part; 12. Sealing part; 13. Connecting part; 14. Limiting part; 111. Support rod; 112. Limiting structure; Section; 1121, connecting rod;

20. Blocking device; 21. Fixed part; 23. Connecting part; 24. Limiting piece; 211. Support rod; 212. Limiting structure; 2112. Connecting section; 2113. Supporting section; line; 2123, connecting rod;

30. Blocking device; 31. Fixing part; 33. Connecting part; 34. Limiting part; 311. Support rod; 312. Limiting structure; 3112. Connecting section; 3113. Supporting section; rod; 31211, recessed area;

40. Blocking device; 41. Fixing part; 411. Support rod; 412. Limiting structure; 4113. Support section; 4121. Connector;

50. Blocking device; 51. Fixed part; 53. Connecting part; 511. Support rod; 5112. Connecting section; 5113. Supporting section; Positioning piece; 51214, the second positioning piece;

60. Blocking device; 61. Fixed part; 611. Support rod; 6113. Support section; 6121. Connector;

70. Blocking device; 71. Fixed part; 711. Support rod; 7111. Sliding groove; 7113. Support section; 7121. Connector;

80. Blocking device; 81. Fixing part; 811. Support rod; 8113. Support section; 8121. Connector.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments. It should also be noted that the orientation terms such as left, right, up, and down in this embodiment are only relative concepts or refer to the normal use state of the product, and should not be regarded as limiting.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be referred to as These terms are limited. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, it should be noted that in the field of interventional medical devices, the end of the medical device implanted in the human body or animal body or the delivery system that transports the medical device that is closer to the operator is generally referred to as the "proximal end", and the distance from the operator The far end is called the "distal end", and according to this principle, the "proximal end" and "distal end" of any part of the medical device or delivery system are defined. "Axial" generally refers to the length direction of the medical device when it is being transported, and "radial" generally refers to the direction perpendicular to the "axial" of the medical device, and the "axis" of any part of the medical device is defined according to this principle to" and "radial".

Embodiment one

1 and 2, an embodiment of the present invention provides an occlusion device 10, the occlusion device 10 includes a fixed part 11 and a sealing part 12 connected to the fixed part 11, the fixed part 11 and the sealing part 12 are connected by The fixing part 11 is used to fix the occlusion device 10 at a predetermined position, and the sealing part 12 is used to occlude the opening of the left atrial appendage.

In this embodiment, the sealing portion 12 and the fixing portion 11 are arranged at intervals along the axial direction of the blocking device 10 . The sealing part 12 is located at the proximal end of the occluding device 10 , and the fixing part 11 is located at the distal end of the occluding device 10 . The occlusion device 10 has a compressed state as shown in FIG. 1 accommodated in the sheath for easy delivery, and an expanded state as shown in FIG. 2 after being protruded from the distal end of the sheath and self-expanded. The shape of the occlusion device 10 after being released in the cavity of the left atrial appendage is completely the same or substantially the same as that in FIG. 2 .

The sealing part 12 is braided into a network tube by a plurality of braiding wires, and the two ends of the network tube are closed and fixed by a distal plug of the sealing part (not shown in the figure). Afterwards, the network pipe is heat-set into shapes such as discs, columns or plugs. The inside of the sealing part 12 is provided with at least one layer of film body (not shown in the figure), and the edge of the film body is fixed on the braided silk at the edge of the sealing part 12, and the film body is used to stop blood flow from one side of the sealing part 12. Flow to the other side to stop blood flow between the LA appendage and the left atrium.

The fixed part 11 includes several support rods 111 and the fixed part plug head (not shown in the figure), and the distal end plug head of the sealing part is connected with the fixed part plug head through the connecting part 13, that is, the fixed part 11 and the sealing part 12 are connected by Section 13 is connected. The supporting rod 111 on the fixing part 11 may be a rod obtained by cutting a metal alloy tube or a polymer tube, or may be a rod made by braiding or winding a braided wire. The proximal ends of the plurality of support rods 111 are all connected to the connecting portion 13, and the distal ends extend radially outward from the central end and turn towards the sealing portion 12, thereby forming a support for contacting with the cavity wall of the left atrial appendage. supporting surface.

Further, a ball head 1111 may be provided at the distal end of the support rod 111 , and the ball head 1111 is arranged at the distal end of the support rod 111 by means of welding, heat melting, entanglement, bonding or the like. The ball head 1111 can prevent the distal end of the support rod 111 from piercing into the inner wall of the left atrial appendage, thereby affecting the fixation of the occlusion device 10, and can also prevent the distal end of the support rod 111 from being hooked to the sealing part 12 when the fixing part 11 is everted. This further affects the normal use of the blocking device 10 .

Further, anchors (not shown in the figure) may be provided on the support rod 111. Generally speaking, the anchors are arranged on the support rod 111 by means of welding, thermal fusion, entanglement, bonding, etc., but not It is excluded that when the support rod 111 is cut and formed, the anchor member is cut and formed directly at the same time. Preferably, the anchor member adopts an anchor thorn structure, and the tip of the anchor thorn penetrates into the inner wall of the left atrial appendage, so that the fixing part 11 is stably anchored on the inner wall of the left atrial appendage, so that the occlusion device 10 realizes the closure of the ostium of the left atrial appendage. blockage.

Specifically, the support rod 111 includes a connecting section 1112 at the proximal end, and a supporting section 1113 formed by radially extending after being connected with the connecting section 1112 .

Specifically, the so-called connecting section 1112 may directly extend radially outward from the connection of the fixing part 11 and the sealing part 12 , and the connecting sections 1112 do not intersect each other. Alternatively, the so-called connecting section 1112 may emanate from one side of the connection between the fixing part 11 and the sealing part 12 and extend radially outward toward the other side of the connection or obliquely toward the other side of the connection. The intersection here includes converging, closing, intersecting, partially intersecting, partially overlapping and other states. Strictly speaking, the projection line of the connecting section 1112 of the two support rods 111 on the longitudinal section of the connecting part 13 has a projected intersection point.

Referring to Fig. 3, in the present embodiment, the connecting section 1112 of at least two supporting rods 111 is at the far end of the connection between the fixing part 11 and the sealing part 12, that is, the far end of the connecting part 13 intersects, and the supporting section 1113 is connected from the connecting part 1112. part 13 protrudes, which can greatly improve the supporting capacity of the occlusion device 10. When the support rod 111 is subjected to the stress of the left atrial appendage, the stress is transmitted along the support rod 111. At the proximal position, it is partially offset by the support rod 111 itself, and partly by the support rod 111. The connecting portion 13 counteracts, thereby further improving the long-term anchoring stability of the occlusion device 10 .

More specifically, in one embodiment, there are two support rods 111 intersecting among the plurality of support rods 111 , and the connecting section 1112 of the intersecting support rods 111 emanates from one side of the connecting portion 13 toward the other side of the connecting portion 13 Or extend obliquely toward the other side of the connecting portion 13 . In another embodiment, there are two support rods 111 intersecting among the plurality of support rods 111, and among the two intersecting support rods 111, the connecting section 1112 of at least one support rod 111 protrudes from one side of the connecting part 13 and Extend toward or obliquely toward the other side of the connecting portion 13 .

In this embodiment, preferably, a plurality of support rods 111 intersect, and the support rods 111 cross the center line of the connecting portion 13 to the opposite side, that is, bend and extend toward the opposite side. The rods 111 intersect at the centerline positions of the connecting parts 13 . After the occlusion device 10 is implanted, when the left atrial appendage contracts and relaxes with the movement of the heart, the component force of the stress generated by the inner wall of the left atrial appendage on the support rods 111 can be divided into axial and radial, and the cross-arranged support rods 111 can be The included angle between the supporting rod 111 and the axis is larger than that of the non-intersecting setting, so that when the stress generated by the inner wall of the left atrial appendage on the supporting rod 111 is transmitted along the supporting rod 111, due to the greater angle between the supporting rod 111 and the axis large, the component force of the stress in the radial direction is larger, and the component force in the axial direction is smaller, so that the adaptive axial deformation of the sealing part 12 becomes smaller, ensuring the stability of the sealing device 10, and the sealing device 10 is supporting When the rod 111 straddles the centerline of the connecting portion 13 , an optimal stabilizing effect is achieved.

Continuing to refer to FIG. 2 , in this embodiment, the support segment 1113 is provided with a restricting structure 112, and the restricting structure 112 prevents adjacent support segments 1113 from approaching each other, preventing entanglement between the support segments 1113 during eversion, that is, The restricting structure 112 prevents the support rods 111 from being entangled with each other during the eversion process of the fixing part 11 , causing the support rods 111 to be unable to fully evert, thereby ensuring the degree of expansion of the fixing part 11 of the occluding device 10 .

As an embodiment, the restricting structure 112 includes a connecting rod 1121 , one end of the connecting rod 1121 abuts or is fixed on the inner side of the supporting section 1113 , and the other end is connected to the connecting part 13 or the connecting section 1112 .

As another embodiment, the restricting structure 112 includes several connecting rods 1121, and the blocking device 10 further includes a limiting member 14, which is an annular structure, preferably a sleeve. The annular structure is sheathed on the outside of the connecting portion 13 and/or the connecting section 1112, and the annular structure is movable in the axial direction. One end of the connecting rod 1121 is held against or fixed on the inner side of the supporting section 1113, and the other end is connected to the annular structure. The limiting member 14 can move axially outside the connecting portion 13 and/or the connecting section 1112 .

In this embodiment, the connecting rods 1121 correspond to the supporting rods 111 one by one. When the supporting section 1113 is everted, the bending direction of the supporting section 1113 is opposite to that of the connecting rod 1121 .

It is worth noting that the limiter 14 only limits the outward expansion of the support rod 111 , but does not limit the approach of the support rod 111 , therefore, the setting of the limiter 14 does not affect the sheathing of the support rod 111 . Moreover, the axial movement of the limiting member 14 does not affect the radial support of the support rod 111 .

In this embodiment, by sheathing the limiting member 14 on the outside of the connecting portion 13 and/or connecting section 1112, and connecting the supporting section 1113 and the limiting member 14 with the connecting rod 1121, such an arrangement can support the supporting rod 111 The distal end of the support section 1113 is restricted by the connecting rod 1121, and the support section 1113 can be fully pulled apart when the support section 1113 is everted, so as to avoid the occurrence of the support rods 111 of the fixed part 11 being entangled with each other, so that the fixed part 11 It can be fully deployed without affecting the passage of the occlusion device 10 into and out of the sheath.

Embodiment two

The same or similarities between Embodiment 2 and Embodiment 1 will not be repeated here. The difference between the blocking device 20 of Embodiment 2 and Embodiment 1 is that the restriction structure 212 of Embodiment 2 includes a coating 2121 and a binding wire 2122 , the binding thread 2122 is preferably a suture thread, and the covering film 2121 is attached to the support rod 211 and is sutured and fixed with the support rod 211 through the binding thread 2122 . As shown in FIG. 4 , the blocking device 20 of the second embodiment may not have a connecting rod and a stopper. Alternatively, as shown in Figure 5, the blocking device 20 of the second embodiment may also have a connecting rod 2123 and a stopper 24, the stopper 24 is sleeved on the outside of the connection part 23 and/or the connecting section 2112, and the stopper 24 is movable in the axial direction, one end of the connecting rod 2123 is resisted or fixed on the inner side of the supporting section 2113 , and the other end is connected to the limiting member 24 . Of course, the blocking device 20 of the second embodiment can also be directly supported or fixed on the inner side of the supporting section 2113 by one end of the connecting rod 2123 , and the other end is connected to the connecting part 23 or the connecting section 2112 . This embodiment does not make specific limitations.

Specifically, the covering film 2121 is made of a polymer material with good biocompatibility, such as a PET film, and PTFE/PEK can also be used. Binding thread 2122 polypropylene braided suture or polyester braided suture, etc.

It is worth noting that the coating 2121 only limits the position of the support rod 211 , but does not restrict the approach of the support rod 211 , therefore, the setting of the coating 2121 does not affect the sheathing of the support rod 211 .

In this embodiment, the covering film 2121 and the fixing part 21 are connected by the binding wire 2122, and the supporting segment 2113 can be turned outward when the supporting segment 2113 is turned outward through the expansion of the covering film 2121 and the restricting effect of the binding wire 2122 on the support rod 211. Fully pull apart to avoid the occurrence of entanglement of the support rods 211 of the fixing part 21, so that the fixing part 21 can be fully expanded without affecting the entry and exit of the occlusion device 20 into and out of the sheath.

Embodiment Three

As shown in Figures 6-8, the same or similarities between Embodiment 3 and Embodiment 2 will not be repeated here. The difference between the blocking device 30 of Embodiment 3 and Embodiment 2 is that the restriction structure of Embodiment 3 312 includes a film 3121 , the film 3121 is nested on the support rod 311 , and any adjacent support rod 311 is separated by the film 3121 .

As shown in Figure 6, the blocking device 30 of Embodiment 2 may not have a connecting rod and a limiting member, or, as shown in Figure 8, the blocking device 30 of Embodiment 2 may also have a connecting rod 3122 and a limiting member at the same time. 34, the limiting member 34 is sleeved on the outside of the connecting portion 33 and/or the connecting section 3112, the limiting member 34 is movable in the axial direction, one end of the connecting rod 3122 is held against or fixed on the inner side of the supporting section 3113, and the other end is connected Limiting piece 34. Of course, the blocking device 30 of the second embodiment can also be directly supported or fixed on the inner side of the supporting section 3113 by one end of the connecting rod 3122 , and the other end is connected to the connecting part 33 or the connecting section 3112 . This embodiment does not make specific limitations.

Specifically, the covering film 3121 is made of a polymer material with good biocompatibility, such as PET film, PTFE/PEK, etc. can also be used.

It is worth noting that the coating 3121 only limits the position of the support rod 311 , but does not restrict the approach of the support rod 311 . Therefore, the setting of the coating 3121 does not affect the sheathing of the support rod 311 .

Specifically, as an embodiment, as shown in FIG. 7 , a recessed area 31211 can be designed on the coating 3121 , and then the support rod 311 is embedded in the recessed area 31211 . As another embodiment, the covering film 3121 is a double-layer film structure, and the support rods 311 are embedded between the double-layer film structures, and then fixed together through heat treatment. As yet another implementation manner, the support rod 311 may be directly nested into the covering film 3121 by introducing a fusing process such as thermal fusion. Of course, the covering film 3121 can also be nested on the supporting rod 311 in other ways, as long as the supporting rod 311 directly interacts with the covering film 3121 in a nested form, so that the covering film 3121 exerts a limit on the intersecting supporting rods 311. bit function.

In this embodiment, by designing the recessed area 31211 of the coating 3121, or by introducing a fusion process such as hot melting, the support rods 311 directly interact with the coating 3121 in a nested form, and the expansion of the coating 3121 is restricted. The effect is to limit the position of the support section 3113. When the support section 3113 is everted, the support section 3113 can be fully pulled apart to avoid the occurrence of the entanglement of the support rods 311 of the fixed part 31, so that the fixed part 31 is fully expanded and will not Affects the passage of the occlusion device 30 into and out of the sheath.

Embodiment Four

As shown in FIG. 9 , the same or similarities between Embodiment 4 and Embodiment 1 will not be repeated here. The difference between the blocking device 40 of Embodiment 4 and Embodiment 1 is that the restriction structure 412 of Embodiment 4 includes connection 4121, the connecting piece 4121 connects two adjacent supporting segments 4113.

Specifically, the connecting member 4121 is an elastic member, preferably a spring. Both ends of the elastic member are connected to two adjacent support segments 4113 , and when the support segments 4113 are everted, the elastic member stretches the two adjacent support segments 4113 . Of course, in this embodiment, elastic blocks and the like can also be used as the connecting piece 4121 , as long as the connecting piece 4121 stretches two adjacent supporting sections 4113 when the supporting section 4113 is everted.

It is worth noting that the connecting piece 4121 only provides a force to expand the support section 4113 and does not affect the sheathing of the support rod 411 .

In this embodiment, two adjacent support segments 4113 are connected by setting elastic members, and the force supported by the support segments 4113 is limited by the elastic members, thereby limiting the position of the support segments 4113, so that the support segments 4113 have a better The radial support force can fully expand the support section 4113 when the support section 4113 is everted, avoiding the occurrence of entanglement of the support rods 411 of the fixing part 41, so that the fixing part 41 can be fully expanded without affecting the blocking device 40 into and out of the sheath. At the same time, after the occlusion device 40 is implanted, when the left atrial appendage contracts and relaxes with the heart movement, the radial component force of the stress generated by the inner wall of the left atrial appendage on the support rod 411 of the fixing part 41 is partially offset by the spring, thereby further improving Long-term anchoring stability of the occlusion device 40 is ensured.

Embodiment five

As shown in Figure 10, the same or similarities between Embodiment 5 and Embodiment 4 will not be repeated here. The difference between the blocking device 50 of Embodiment 5 and Embodiment 4 is that the connector 5121 of Embodiment 5 is telescopic The two ends of the telescopic rod are connected to two adjacent support segments 5113, and when the support segments 5113 are everted, the telescopic rod stretches the two adjacent support segments 5113.

In this embodiment, two adjacent support sections 5113 are connected by setting a telescopic rod, and the force supported by the support section 5113 is limited by the telescopic rod, thereby limiting the position of the support section 5113, so that the support section 5113 has a better The radial support force can fully expand the support section 5113 when the support section 5113 is everted, avoiding the occurrence of entanglement of the support rods 511 of the fixing part 51, so that the fixing part 51 can be fully expanded without affecting the blocking device 50 into and out of the sheath.

Further, in this embodiment, the telescopic rod can be connected to the connecting part 53 or the connecting section 5112 through a connecting rod (not shown), that is, one end of the connecting rod is held against or fixed on the inner side of the supporting part 5113, and the other end is connected to the connecting part 53 or connection section 5112. Therefore, the occluding device 50 can not only avoid the entanglement of the support rods 511 of the fixing part 51 , but also provide radial support force for the fixing part 51 to improve the anchoring stability of the occluding device 50 .

As shown in FIG. 11 , specifically, the telescopic rod includes an inner tube 51211 and an outer tube 51212 that can slide relatively, and the outer tube 51212 is sheathed outside the inner tube 51211 . The part of the inner tube 51211 set in the outer tube 51212 is provided with a first positioning piece 51213, and the position of the outer tube 51212 corresponding to the first positioning piece 51213 is provided with a second positioning piece 51214. Relatively far away from the first positioning member 51213 and the second positioning member 51214 when they are in alignment, they are locked to limit the relative sliding of the inner tube 51211 and the outer tube 51212 .

As an embodiment, one of the first positioning part 51213 and the second positioning part 51214 is an elastic protrusion, and the other is a groove or a through hole. The inner tube 51211 and the outer tube 51212 can slide relatively axially. When the elastic protrusion When sliding to the position corresponding to the groove or the through hole, the elastic protrusion is clamped in the groove or the through hole, thereby limiting the relative sliding of the inner tube 51211 and the outer tube 51212 .

In this embodiment, by setting the first positioning piece 51213 and the second positioning piece 51214, after the occlusion device 50 is implanted, the first positioning piece 51213 and the second positioning piece 51214 limit the relative sliding of the inner tube 51211 and the outer tube 51212 , when the left atrial appendage contracts and relaxes with the movement of the heart, the supporting rods 511 will not be squeezed and deformed, that is, the fixed part 51 still maintains the original expanded shape. This method can lock the distal end of the support rod 511 and maximize the long-term anchoring stability of the occlusion device 50 .

Embodiment six

As shown in Figure 12, the same or similarities between Embodiment 6 and Embodiment 4 will not be repeated here. The difference between the blocking device 60 of Embodiment 6 and Embodiment 4 is that the connector 6121 of Embodiment 6 is a An engaging rod, the connecting rod connects two adjacent support segments 6113 and the distance between the connecting position and the distal end point of the support rod 611 is different, that is, the connecting rod is obliquely arranged on the adjacent two support segments 6113, and the oblique setting makes the support segment 6113 can move closer, that is, it does not affect the sheathing of the support rod 611.

Optionally, the inclination directions of two adjacent connecting rods may be the same or different, which is not specifically limited in this embodiment, as long as the sheathing of the support rod 611 is not affected. Preferably, in this embodiment, the inclination directions of two adjacent connecting rods are different, so that such setting will not affect the sheathing of the supporting rod 611 and can provide better radial support force for the supporting rod 611 .

Specifically, the connecting rod can be made of polymer material with strong toughness and certain strength, metal material such as nickel-titanium wire, nickel-titanium alloy, or elastic material with high elasticity such as PA, PP, PET, etc.

In this embodiment, two adjacent support segments 6113 are connected by setting connecting rods, and the force supported by the supporting segments 6113 is limited by the connecting rods, thereby limiting the position of the supporting segments 6113, so that the supporting segments 6113 have better The radial support force can fully expand the support section 6113 when the support section 6113 is everted, avoiding the entanglement of the support rods 611 of the fixing part 61, so that the fixing part 61 can be fully expanded without affecting the blocking device 60 into and out of the sheath. At the same time, after the occlusion device 60 is implanted, when the left atrial appendage contracts and relaxes with the movement of the heart, the radial force component of the stress generated by the inner wall of the left atrial appendage on the support rod 611 of the fixing part 61 is offset by the in-line connector , thereby further improving the long-term anchoring stability of the blocking device 60 .

Embodiment seven

As shown in Figure 13, the same or similarities between Embodiment 7 and Embodiment 6 will not be repeated here. The difference between the blocking device 70 of Embodiment 7 and Embodiment 6 is that the connector 7121 of Embodiment 7 is two The two connecting rods form an X shape, that is, the two connecting rods are rotatably connected or arranged crosswise, and the two connecting rods are connected to two adjacent support segments 7113.

Specifically, the connector 7121 can be a polymer material with strong toughness and a certain strength, or a metal material such as nickel-titanium wire, nickel-titanium alloy, or an elastic material with high elasticity such as PA, PP, PET, etc.

Optionally, the intersections of the two connecting rods may be movably connected or not connected (only crossed), as long as the sheathing of the support rod 711 is not affected.

As shown in Figure 14, specifically, one end of an engaging rod is slidably connected with the supporting section 7113, specifically, a sliding groove 7111 can be provided on the supporting section 7113, and then one end of an engaging rod is placed in the sliding groove 7111 to limit its disengagement sliding groove 7111, and this end can slide in the sliding groove 7111, so that when the support rod 711 enters and exits the sheath tube and the fixed part 71 is everted, one end of an engaging rod can slide in the sliding groove 7111, thereby making the support rod 711 move in and out The sheath tube and the fixing part 71 are more smooth when everted, reducing the feeling of jamming. In this embodiment, the adjacent ends of the two connecting rods that are rotatably connected or arranged crosswise are slidably connected with the supporting section 7113 .

In this embodiment, two adjacent support segments 7113 are connected by setting two connecting rods that are rotated or crossed, and the force supported by the support segments 7113 is limited, thereby limiting the position of the support segments 7113, so that the support segments 7113 has a better radial support force. When the support section 7113 is everted, the support section 7113 can be fully stretched to avoid the occurrence of entanglement of the support rods 711 of the fixing part 71, so that the fixing part 71 can be fully expanded and not It will affect the passage of the blocking device 70 into and out of the sheath. At the same time, after the occlusion device 70 is implanted, when the left atrial appendage contracts and relaxes with the movement of the heart, the radial component of the stress generated by the inner wall of the left atrial appendage on the support rod 711 of the fixing part 71 is rotationally connected or arranged crosswise. The two engagement rods offset, thereby further improving the long-term anchoring stability of the occlusion device 70 .

Embodiment eight

As shown in Figure 15, the same or similarities between Embodiment 8 and Embodiment 6 will not be repeated here. The difference between the blocking device 80 of Embodiment 8 and Embodiment 6 is that the connector 8121 of Embodiment 8 is four One connecting rod and four connecting rods are connected end to end to form a rhombus. One relative two intersection points of the four connecting rods connected end to end connect two adjacent support segments 8113, and the other relative two intersection points can move closer or farther away in the axial direction. Certainly, the four connecting rods connected end to end in sequence may also form a square shape, which is not specifically limited in this embodiment.

Specifically, the connector 8121 can be a polymer material with strong toughness and a certain strength, or a metal material such as nickel-titanium wire, nickel-titanium alloy, or an elastic material with high elasticity such as PA, PP, PET, etc.

In this embodiment, two adjacent support sections 8113 are connected by setting four connecting rods connected end to end in order to limit the force supported by the support section 8113, thereby limiting the position of the support section 8113, so that the support section 8113 has Better radial support force, when the support section 8113 is everted, the support section 8113 can be fully stretched, avoiding the occurrence of entanglement of the support rods 811 of the fixing part 81, so that the fixing part 81 can be fully expanded without affecting The occlusion device 80 is passed in and out of the sheath. At the same time, after the occlusion device 80 is implanted, when the left atrial appendage contracts and relaxes with the heart movement, the radial component of the stress generated by the inner wall of the left atrial appendage on the support rod 811 of the fixing part 81 is sequentially connected end to end by four The engagement rods counteract, thereby further improving the long-term anchoring stability of the occlusion device 80 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (14)

1. A occlusion device, comprising a fixing part for fixing the occlusion device at a predetermined position, a sealing part connected with the fixing part for sealing, characterized in that the fixing part comprises several supports A rod, the support rod includes a connecting section located at the proximal end, and a supporting section connected to the connecting section for supporting, the supporting section is provided with a restricting structure, and the restricting structure prevents the adjacent supporting section from segments are close to each other. 2 . The occlusion device according to claim 1 , wherein the connection sections of at least two support rods intersect at the distal end of the connection between the fixing part and the sealing part. 3 . 3. The occlusion device according to claim 1 or 2, characterized in that: the restricting structure includes a connecting rod, one end of the connecting rod resists or fixes the inner side of the supporting section, and the other end connects the connecting rod. segment or the junction of the fixing portion and the sealing portion. 4. The blocking device according to claim 3, characterized in that: the blocking device further comprises a stopper, the stopper is an annular structure, and the annular structure is sleeved between the fixing part and the fixed part. The joint of the sealing part and/or the outside of the connecting section, the annular structure is movable in the axial direction, one end of the connecting rod is held against or fixed on the inner side of the supporting section, and the other end is connected to the annular structure . 5. The occlusion device according to claim 1 or 4, characterized in that: the restricting structure comprises a membrane, and the membrane is nested on the support rod. 6. The occlusion device according to claim 1 or 4, characterized in that: the restricting structure includes a connecting piece, and the connecting piece connects two adjacent supporting sections. 7. The occlusion device according to claim 6, characterized in that: the connecting piece is an elastic piece, two ends of the elastic piece are connected to two adjacent supporting sections, the elastic piece is in a compressed state and supports Open two adjacent support segments. 8. The blocking device according to claim 6, wherein the connector is a telescopic rod, two ends of the telescopic rod are connected to two adjacent support segments, and the telescopic rod stretches two adjacent the support segment. 9. The blocking device according to claim 8, characterized in that: the telescopic rod includes an inner tube and an outer tube that can slide relatively, the outer tube is sheathed outside the inner tube, and the inner tube is set The part inside the outer tube is provided with a first positioning piece, and the position of the outer tube corresponding to the first positioning piece is provided with a second positioning piece. When the support section is turned outward, the inner tube and the outer tube Relatively far away, the first locating member is locked when aligned with the second locating member so as to limit the relative sliding of the inner tube and the outer tube. 10. The blocking device according to claim 9, characterized in that: one of the first positioning member and the second positioning member is an elastic protrusion, while the other is a groove or a through hole, and the elastic When the protrusion is aligned with the groove or the through hole, the elastic protrusion is engaged in the groove or the through hole. 11. The occlusion device according to claim 6, characterized in that: the connecting member is an engaging rod, and the connecting rod connects two adjacent supporting segments and the connecting position is the same as that of the supporting rod. The far end points are at different distances. 12. The blocking device according to claim 6, characterized in that: the connectors are two connecting rods, both of which connect two adjacent supporting sections, and the two connecting rods Turn connection or crossover setup. 13. The blocking device according to claim 12, characterized in that: one end of the connecting rod is slidably connected with the supporting section. 14. The blocking device according to claim 6, characterized in that: the connecting parts are four connecting rods, and the four connecting rods are connected end to end in turn, and one of the four connecting rods connected end to end is opposite to two. The intersection connects two adjacent support segments, and the other two opposite intersections can approach or move away from each other in the axial direction.

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