Medical occlusion device

Abstract

The present invention relates to a medical occlusion device, which includes a sealing disk and a fixed disk connected to the distal end of the sealing disk; the fixed disk includes an inner frame and an outer frame, and the inner frame is provided with barbs; the medical occlusion device has a semi-expanded state and a fully expanded state. When the medical occlusion device is in the semi-expanded state, the inner frame and the barbs are both located within the outer frame; when the medical occlusion device is in the fully expanded state, the inner frame is located within the outer frame, and the barbs extend beyond the outer frame so that the free ends of the barbs protrude from the outside of the outer frame. After the outer frame of the medical occlusion device of the present invention is expanded to have a certain supporting force, the barbs extend and penetrate into the tissue, and the barbs can be inserted into the tissue obliquely from the distal end to the proximal end.

Description

Technical Field

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

[0002] The left atrial appendage (LAA) is a narrow, curved, blind-end structure extending forward and downward along the anterior wall of the left atrium (LA). It has active contraction and secretion functions, playing a crucial role in alleviating elevated intra-LA pressure and ensuring left ventricle (LV) filling. In cardiovascular disease, the LAA's unique anatomical structure and functional characteristics make it a prime site for thrombosis. If a thrombus causes cerebral infarction, widespread cerebral embolism can lead to cerebral infarction and even brain death. This can occur at any time and in any location, posing a serious threat to the patient's life and health.

[0003] Therefore, patients with atrial fibrillation and high risk of embolism need active anticoagulant treatment, which carries the risk of bleeding, including cerebral hemorrhage. Left atrial appendage occlusion surgery uses an occluder to block the left atrial appendage through interventional surgery to prevent the formation of left atrial appendage thrombus during atrial fibrillation, eliminate the patient's dependence on long-term oral anticoagulant treatment, and provide a new treatment option for patients who cannot receive long-term anticoagulant treatment, are unwilling to receive drug anticoagulant treatment, and have a high risk of bleeding.

[0004] The left atrial appendage occluder generally comprises a sealing disc and a fixed disc connected at the distal end of the sealing disc, the fixed disc extending into the left atrial appendage and anchored to the inner wall of the left atrial appendage, and the sealing disc is enclosed at the left atrial appendage entrance, thereby preventing blood from flowing into the left atrial appendage. Some left atrial appendage occluders are provided with barbs, which are used to pierce the inner wall of the left atrial appendage, thereby increasing the anchoring performance of the left atrial appendage occluder. The barbs are generally arranged on the periphery of the fixed disc, and when the fixed disc is unfolded, the barbs pierce the inner wall of the left atrial appendage. Due to individual differences, the shape of the left atrial appendage inner space is not a regular cylindrical shape, and the barbs cannot pierce the left atrial appendage inner wall obliquely from the distal end to the proximal end as expected, or pierce the left atrial appendage inner wall prematurely, causing the position of the left atrial appendage occluder to be difficult to adjust in real time during the release process. Summary of the Invention

[0005] The present invention aims to provide a medical occlusion device, wherein the barbs of the medical occlusion device can be expected to penetrate into tissue obliquely from the distal end to the proximal end during the release process, so as to improve the overall anchoring performance of the medical occlusion device.

[0006] The present invention provides a medical occlusion device, comprising: a sealing disc and a fixing disc, wherein the fixing disc is connected to the distal end of the sealing disc;

[0007] The fixed plate includes an inner frame and an outer frame, and the inner frame is provided with barbs;

[0008] The medical occlusion device has a semi-expanded state and a fully expanded state. When the medical occlusion device is in the semi-expanded state, the inner frame and the barbs are both located inside the outer frame; when the medical occlusion device is in the fully expanded state, the inner frame is located inside the outer frame, and the barbs pass over the outer frame so that the free ends of the barbs protrude outside the outer frame.

[0009] In one embodiment, the outer frame includes a plurality of outer support rods, and the plurality of outer support rods include a plurality of outer lead-out sections extending from the center of the fixed plate toward the distal end, and the distal ends of the outer lead-out sections are connected to outer suspended sections that bend toward the proximal end.

[0010] In one embodiment, when the occlusion device is in a fully expanded state, the barb extends from a proximal side of the end of the outer suspended section away from the lead-out section.

[0011] In one embodiment, a through hole is provided on the outer suspended section, and when the blocking device is in a fully expanded state, the barbs on the inner frame extend from the through hole to the outside of the outer frame.

[0012] In one embodiment, the through hole has an inner opening and an outer opening, the inner opening faces the inner side of the outer frame, and the outer opening faces the outer side of the outer frame; when the occlusion device is in a fully expanded state, the farthest end of the inner opening is closer to the distal end of the medical occlusion device than the farthest end of the outer opening; the proximal end of the outer opening is closer to the proximal end of the medical occlusion device than the proximal end of the inner opening.

[0013] In one embodiment, the distal end surface of the through hole is connected to the inner wall surface of the outer support rod through an arc surface transition.

[0014] In one embodiment, the inner frame includes a plurality of inner support rods, and the plurality of inner support rods include a plurality of inner lead-out sections extending from the center of the fixed plate toward the distal end, and the distal ends of the inner lead-out sections are connected to inner suspended sections bent toward the proximal end; the plurality of inner support rods are arranged around the plurality of outer support rods, and the inner support rods and the outer support rods correspond one to one in the radial direction of the medical occlusion device.

[0015] In one embodiment, when the occlusion device is in a fully deployed state, the angle between the inner lead-out section and the central axis of the medical occlusion device is greater than the angle between the outer lead-out section and the central axis of the medical occlusion device.

[0016] In one embodiment, the angle between the inner connecting section and the outer connecting section is greater than 10 degrees.

[0017] In one embodiment, when the occlusion device is in a fully expanded state, the curvature of the inner suspended section is smaller than the curvature of the outer suspended section.

[0018] The fixing disk of the medical occlusion device of the present invention has an inner frame and an outer frame, and during the deployment process, the barbs gradually extend from the inner side of the outer frame to the outer side of the outer frame, so that after the outer frame is deployed to have a certain supporting force, the barbs extend again and penetrate into the tissue. During this period, the doctor can adjust the position of the medical occlusion device according to the release situation to ensure that the position of the medical occlusion device after release is in line with expectations, and the barbs can be inserted into the tissue obliquely from the distal end to the proximal end, thereby improving the anchoring performance of the medical occlusion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the medical occlusion device of the present invention.

[0020] Figure 2 This is a diagram of the release process of the medical occlusion device of the present invention (only the outer frame is exposed from the delivery device).

[0021] Figure 3 This is a diagram of the release process of the medical occlusion device of the present invention (both the inner frame and the outer frame are exposed from the delivery device).

[0022] Figure 4 This is a diagram of the release process of the medical occlusion device of the present invention (the medical occlusion device is in a semi-released state).

[0023] Figure 5 This is a diagram of the release process of the medical occlusion device of the present invention (the medical occlusion device is in a completely released state).

[0024] Figure 6 It is a front view of a medical occlusion device in another embodiment of the present invention.

[0025] Figure 7 This is a front view of the fixing disk of the present invention (the medical occlusion device is in a fully released state).

[0026] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0027] Figure 9 For the external hanging section Figure 8 Partial cross-sectional view at point B.

[0028] Figure 10 It is a front view of a medical occlusion device in another embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] To more clearly describe the structure of a medical occlusion device, the terms "distal" and "proximal" are defined here. These terms are commonly used in the field of interventional medical devices. Specifically, "distal" refers to the end away from the operator during surgery, while "proximal" refers to the end closer to the operator during surgery.

[0032] like Figure 1 As shown, this embodiment provides a medical occlusion device 1, which includes a sealing disc 11 and a fixed disc 12. The fixed disc 12 is used to enter the cavity to be occluded and anchored on the inner wall of the cavity to be occluded. The sealing disc 11 is used to block the opening of the cavity to be occluded, thereby sealing the cavity to be occluded. The cavity to be occluded includes but is not limited to the left atrial appendage, aneurysm, etc. For ease of understanding, this embodiment uses the left atrial appendage as an example to specifically illustrate the structure of the medical occlusion device 1 of the present invention.

[0033] In which, the fixed disk 12 includes an inner frame 121 and an outer frame 122, and the inner frame 121 is provided with barbs 123; the medical occlusion device 1 has a semi-expanded state and a fully expanded state. When the medical occlusion device 1 is in the semi-expanded state, the inner frame 121 and the barbs 123 are both located in the outer frame 122; when the medical occlusion device 1 is in the fully expanded state, the inner frame 121 is located in the outer frame 122, and the barbs 123 pass over the outer frame 122 so that the free ends of the barbs 123 protrude from the outside of the outer frame 122.

[0034] It should be noted that before implanting the medical occlusion device 1, it is necessary to constrict the medical occlusion device 1 into the delivery device 2 and release the medical occlusion device 1 after reaching the target location. Release herein refers to the removal of the radial restraining force applied to the medical occlusion device 1. In this embodiment, this specifically involves withdrawing the delivery device 2 to remove the radial pressure exerted on the medical occlusion device 1 by the inner wall of the delivery device 2. In other embodiments, release may also refer to loosening the ropes binding the medical occlusion device 1, or releasing other restraining components used to radially restrain the medical occlusion device 1.

[0035] Combine Figures 2 to 5 As the conveying device 2 is removed, the end of the outer frame 122 is exposed to the conveying device 2 (eg Figure 2 As shown), the end of the inner frame 121 then exposes the conveying device 2 (as shown Figure 3 As shown in FIG), when the restraining force applied to the medical occlusion device 1 is removed until the outer frame 122 is expanded to a certain extent but the barbs 123 are still located in the outer frame 122, it is in a semi-released state (as shown in FIG). Figure 4 As shown), when the restraining force applied to the fixing plate 12 is completely removed, it is in a fully released state (as shown Figure 5 shown).

[0036] Since the fixing plate 12 of the medical occlusion device 1 of the present invention has an inner frame 121 and an outer frame 122, when the outer frame 122 is released to the point where it can abut against the inner wall of the implantation position, the outer frame 122 has played a certain anchoring role, and the outer frame 122 can help the entire medical occlusion device 1 to be positioned. When the operator confirms that the outer frame 122 has reached the appropriate position, the subsequent release of the entire medical occlusion device 1 will not cause it to deviate from the predetermined release position or deflect. Therefore, the operator can adjust the position of the medical occlusion device 1 according to the release of the outer frame 122. For example, the operator can control the conveying device to retract and release the medical occlusion device 1 multiple times. After confirming that the position of the outer frame 122 meets the expected requirements, the medical occlusion device 1 can be further released to allow the barbs 123 to pass over the outer frame 122 and penetrate into the tissue, thereby avoiding the situation where the inner wall of the left atrial appendage is scratched when adjusting the position of the medical occlusion device 1. For the design without the outer frame 122, the barbs 123 pop out directly when released, and the insertion angle or insertion position of the barbs 123 may easily exceed expectations, thereby causing the medical occlusion device 1 as a whole to deflect or leave the predetermined position after implantation. The solution recorded in this embodiment is to perform the first step of limiting through the outer frame 122. When the barbs 123 are released, the outer frame 122 can partially restrict the movement of the barbs 123 and correct the insertion angle of the barbs 123, and can also offset the force along the axial direction caused by the barbs 123 popping out or inserting into the predetermined position, thereby avoiding the deviation of the device as a whole from the preset position or deflection due to the natural popping out of the barbs 123.

[0037] Understandably, if Figure 1 As shown, when no restraining force is applied to the medical occlusion device 1, the maximum outer diameter of the outer frame is D. In order to ensure that the medical occlusion device 1 has a certain supporting force when in a semi-released state, the maximum outer diameter of the outer frame in the semi-released state is greater than or equal to 0.8D.

[0038] In this embodiment, if Figure 6As shown, the outer frame 122 includes a plurality of outer support rods 1221, each of which includes a plurality of outer lead-out sections 1221a extending from the center of the fixed disk 12 toward the distal end, with the distal ends of the outer lead-out sections 1221a connected to outer suspended sections 1221b that bend toward the proximal end. The inner frame 121 includes a plurality of inner support rods 1211, each of which includes a plurality of inner lead-out sections 1211a extending from the center of the fixed disk 12 toward the distal end, with the distal ends of the inner lead-out sections 1211a connected to inner suspended sections 1211b that bend toward the proximal end. The plurality of inner support rods 1211 are arranged around the plurality of outer support rods 1221, and the inner support rods 1211 and the outer support rods 1221 correspond one-to-one in the radial direction of the medical occlusion device 1. Since the free ends of the inner support rod 1211 and the outer support rod 1221 in this embodiment are both curled toward the proximal end during the release process, the inner support rod 1211 needs to be wrapped around the outer support rod 1221 so that the outer support rod 1221 can wrap the inner support rod 1211 inside after curling toward the proximal end, thereby preventing the barbs 123 of the inner support rod 1211 from piercing into the tissue prematurely.

[0039] In this embodiment, the inner support rod 1211 and the outer support rod 1221 are both metal rods, such as memory metals such as nickel-titanium alloy and titanium alloy. In actual production, multiple inner support rods 1211 can be cut out of a metal tube, and then heat-set into the desired shape of the inner frame 121. Among them, one end of the metal tube can be left uncut to form a fixing ring 13 for fixing the inner support rod 1211, or multiple inner support rods 1211 are welded or bonded to the fixing ring 13 and then heat-set. Similarly, multiple outer support rods 1221 are also formed into the outer frame 122 by cutting and heat-setting, and the proximal end of the outer frame 122 is connected to the fixing ring 13 by welding or bonding.

[0040] The fixing ring 13 is also used to connect the sealing disk 11. The sealing portion is a woven mesh structure. In actual production, a plurality of braided wires or a single braided wire are woven into a mesh tube, and the ends of the braided wires are closed and fixed at both ends of the mesh tube by a sealing portion bolt. The mesh tube is then heat-formed into a disc-like, columnar or plug-like shape to obtain a sealing portion for sealing the left atrial appendage opening. The interior of the sealing portion is provided with at least one layer of film (not shown in the figure), and the edge of the film is fixed on the braided wire at the edge of the sealing portion. The film is used to prevent blood from flowing from one side of the sealing portion to the other side, so as to prevent blood from circulating between the left atrial appendage and the left atrium. The sealing portion bolt located at the far end of the sealing disk 11 is used for welding or bonding with the fixing ring 13 of the fixed disk 12.

[0041] In other embodiments, the inner frame and / or the outer frame may be a woven mesh structure, for example Figure 7 The medical occlusion device 3 shown has an inner frame 321 that is a skeleton structure with multiple inner support rods, and an outer frame 322 that is a woven mesh structure. In actual production, the outer frame 322 can be made of a mesh tube formed by weaving a single or multiple metal wires (such as nickel-titanium wires). One end of the mesh tube is first fixed in the fixing ring 33 together with the multiple inner support rods, and then the other end of the mesh tube is folded outward and also fixed in the fixing ring 33. Finally, the mesh tube is heat-set into the desired shape to obtain the fixed disk 32. In other embodiments, the inner frame 321 and the outer frame 322 can both adopt a woven mesh structure, or the outer frame 322 can adopt a skeleton structure and the inner frame 321 can adopt a woven mesh structure, or the inner and outer support rods can be rods made of braided wires through weaving or winding, etc., and it is only necessary to reserve a structure on the outer frame 322 for the barbs 323 to pass through.

[0042] Replay Figure 6 In this embodiment, the length of the inner overhang section 1211b is shorter than the length of the outer overhang section 1221b; when the occluding device 1 is in a fully deployed state, the angle β between the inner lead-out section 1211a and the central axis Z of the medical occluding device 1 is greater than the angle α between the outer lead-out section 1221a and the central axis Z of the medical occluding device 1. Therefore, during the release of the fixing plate 12, when the distal end of the delivery device 2 is withdrawn to the position where the outer overhang section 1221b and the outer lead-out section 1221a meet, the outer overhang section 1221b is fully deployed, and the medical occluding device 1 has a certain supporting capacity. However, because the length of the inner overhang section 1211b is shorter than the outer overhang section, the barbs 123 are unable to pass over the outer overhang section 1221b at this point. When the conveying device 2 continues to be withdrawn, the external force applied to the inner lead-out section 1211a is gradually withdrawn. Since the angle β is greater than the angle α, the inner lead-out section 1211a is radially tilted outward to a greater extent than the outer lead-out section 1221a, that is, the barb 123 moves radially outward relative to the outer suspended portion and at the same time moves proximally until it passes the outer suspended portion and penetrates into the tissue. The entire release process ensures that after the outer frame 122 is expanded to have a certain supporting force, the barb 123 extends out and penetrates into the tissue, and the barb 123 can be inserted into the tissue obliquely from the distal end to the proximal end.

[0043] It can be understood that the larger the angle between the inner lead-out section 1211a and the outer lead-out section 1221a, that is, the greater the angle difference between angle α and angle β, the greater the movement distance of the barb 123 relative to the outer suspended section 1221b when the inner lead-out section 1211a and the outer lead-out section 1221a are released. Preferably, in order to ensure that the barb 123 can cross the outer frame 122 to a sufficient length to obtain sufficient anchoring force, the angle between the inner lead-out section 1211a and the outer lead-out section 1221a is greater than 10 degrees.

[0044] Furthermore, when the occlusion device 1 is in a fully deployed state, the curvature of the inner overhanging section 1211b is smaller than the curvature of the outer overhanging section 1221b. Understandably, given the same length, the greater the curvature of the inner overhanging section 1211b, the smaller its radial width is. This means that an inner lead-out section 1211a with a larger angle β is required to allow the barbs 123 to move radially a sufficient distance past the outer overhanging section 1221b during the release of the inner lead-out section 1211a. However, an excessively large angle β can increase the difficulty of sheathing the medical device. Therefore, making the curvature of the inner overhanging section 1211b smaller than that of the outer overhanging section 1221b can reduce the required angle β of the inner lead-out section 1211a, thereby reducing the difficulty of sheathing.

[0045] Furthermore, the outer support rod 1221 in this embodiment also includes a bending section 1221c, which is connected to the end of the outer suspended section 1221b away from the outer lead-out section 1221a. The bending section 1221c is bent toward the inner side and distal end of the medical occlusion device 1, so that the free end of the outer support rod 1221 is bent into the medical occlusion device 1, thereby preventing the end of the outer support section from directly piercing the tissue and causing the medical occlusion device 1 to be dislocated.

[0046] Due to the existence of the bent section 1221c, the barbs 123 on the inner support rod 1211 are difficult to pass over the outer frame 122 from the edge of the outer frame 122 and penetrate into the tissue. Figure 8 As shown, the outer suspended section 1221b is provided with a through hole 12211. When the occlusion device is in a fully expanded state, the barbs 123 on the inner frame 121 extend from the through hole 12211 to the outside of the outer frame 122. The through hole 12211 is provided, and the inner suspended section 1211b passes through the through hole 12211 and penetrates the tissue, so that the inner suspended section 1211b and the outer suspended section 1221b are mutually constrained, thereby making the overall structure of the medical occlusion device 1 more stable. It should be noted that since the inner support rods 1211 and the outer support rods 1221 are arranged in a one-to-one correspondence in the radial direction, and both the inner support rods 1211 and the outer support rods 1221 have been heat-set, during the release process, the inner support rods 1211 will expand in the same expansion direction as the outer support rods 1221, that is, the barbs 123 can smoothly enter the through hole 12211. Even if part of the outer support rod 1221 is squeezed by the structure inside the left atrial appendage when it is unfolded, causing the barb 123 to be unable to enter the through hole 12211 after the inner support rod 1211 is unfolded, the barb 123 can still extend from the side of the support rod and can also play an anchoring role.

[0047] like Figure 9 As shown, the through hole 12211 has an inner opening 12211a and an outer opening 12211b. The inner opening 12211a faces the inner side of the outer frame 122, and the outer opening 12211b faces the outer side of the outer frame 122. When the occluding device 1 is in a fully deployed state, the distal end of the inner opening 12211a is closer to the distal end of the medical occluding device 1 than the distal end of the outer opening 12211b. The proximal end of the outer opening 12211b is closer to the proximal end of the medical occluding device 1 than the proximal end of the inner opening 12211a. In other words, the through hole 12211 gradually tilts proximally from the inner side to the outer side of the medical occluding device 1. The tilted through hole 12211 serves as a guide, allowing the barbs 123 to penetrate the tissue obliquely toward the proximal end. Specifically, the distal end surface of the through hole 12211 is connected to the inner side of the outer support rod 1221 without transition through the arc surface 12211c. The provision of the arc surface 12211c not only enlarges the inner opening 12211a, but also guides the barb 123, allowing the barb 123 to more easily enter the through hole 12211. In other embodiments, the inner opening 12211a and the outer opening 12211b are the same size, and the inner opening 12211a is located closer to the distal end than the outer opening 12211b.

[0048] In other embodiments, Figure 10 As shown, when the occlusion device 4 is in a fully deployed state, the barbs 423 extend from the proximal end of the outer hanging section 4221b, away from the outer lead-out section 4221a. In this embodiment, the medical occlusion device 4 lacks the bent section, so the barbs 423 can extend directly from the end of the outer hanging section 4221b and penetrate into tissue.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A medical occlusion device, characterized in that: include: a sealing disc and a fixing disc, wherein the fixing disc is connected to a distal end of the sealing disc; The fixed plate includes an inner frame and an outer frame, and the inner frame is provided with barbs; The medical occlusion device has a semi-expanded state and a fully expanded state. When the medical occlusion device is in the semi-expanded state, the inner frame and the barbs are both located inside the outer frame. When the medical occlusion device is in the fully expanded state, the inner frame is located inside the outer frame, and the free ends of the barbs pass over the outer frame so that the free ends of the barbs protrude outside the outer frame. The outer frame includes a plurality of outer support rods, the plurality of outer support rods including a plurality of outer lead-out sections extending from the center of the fixed disk toward the distal end, the distal ends of the outer lead-out sections being connected to outer suspended sections bent toward the proximal end; the inner frame includes a plurality of inner support rods, the plurality of inner support rods including a plurality of inner lead-out sections extending from the center of the fixed disk toward the distal end, the distal ends of the inner lead-out sections being connected to inner suspended sections bent toward the proximal end; the plurality of inner support rods are arranged around the plurality of outer support rods, and the inner support rods and the outer support rods correspond one to one in the radial direction of the medical occlusion device; the length of the inner suspended section is smaller than the length of the outer suspended section; When the occluding device is in a fully deployed state, the angle between the inner lead-out section and the central axis of the medical occluding device is greater than the angle between the outer lead-out section and the central axis of the medical occluding device.

2. The medical occlusion device according to claim 1, characterized in that: When the occluding device is in a fully expanded state, the free end of the barb extends from the proximal end side of the end of the outer suspended section away from the lead-out section.

3. The medical occlusion device according to claim 1, characterized in that: The outer suspended section is provided with a through hole. When the blocking device is in a fully expanded state, the free ends of the barbs on the inner frame extend from the through hole to the outside of the outer frame.

4. The medical occlusion device according to claim 3, characterized in that: The through hole has an inner opening and an outer opening, the inner opening faces the inner side of the outer frame, and the outer opening faces the outer side of the outer frame; when the occlusion device is in a fully expanded state, the farthest end of the inner opening is closer to the distal end of the medical occlusion device than the farthest end of the outer opening; the proximal end of the outer opening is closer to the proximal end of the medical occlusion device than the proximal end of the inner opening.

5. The medical occlusion device according to claim 4, characterized in that: The distal end surface of the through hole is connected to the inner wall surface of the outer support rod through an arc surface transition.

6. The medical occlusion device according to claim 1, characterized in that: The angle between the inner lead-out section and the outer lead-out section is greater than 10 degrees.

7. The medical occlusion device according to claim 1, characterized in that: When the blocking device is in a fully expanded state, the curvature of the inner suspended section is smaller than the curvature of the outer suspended section.

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