CN216985011U - Aneurysm plugging device - Google Patents

Abstract

The utility model relates to an aneurysm occlusion device, which comprises an occlusion body and a support body. The occlusion body comprises a main body portion and a lumen, the main body portion having a distal end and a proximal end; the support body is positioned in the inner cavity and is provided with a far end and a near end; at least one of the distal end and the proximal end of the body portion has a necked-in portion recessed in a corresponding end of the body portion; and the closing-in part is connected with the corresponding end of the support body. At least one of the proximal end and the distal end of the body portion has a necked-in portion recessed in the corresponding end of the body portion, such that when the aneurysm occlusion device is positioned at an aneurysm, the necked-in portion does not protrude beyond the corresponding end of the body portion, reducing the risk of rupture of the aneurysm. Since the cuff portion is connected to the corresponding end of the support body, the cuff portion can be restrained by the corresponding end of the support body, further reducing the risk of rupture of the aneurysm.

Description

Aneurysm plugging device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an aneurysm plugging device.

Background

Intracranial aneurysm is the damage of blood vessel wall of intracranial artery due to factors such as congenital anomaly or acquired injury, and under the action of hemodynamic load and other factors, the intracranial aneurysm gradually expands and forms abnormal bulging. With the rapid development of intracranial aneurysm interventional therapy technology in recent 30 years, new aneurysm interventional therapy instruments continue to emerge, which are developed from a spring ring to a blood flow guiding device and then to an intratumoral occlusion device.

The spring ring embolism treatment technology is mainly used for plugging a spring ring in an aneurysm to plug the aneurysm, so that the flow field of blood in the aneurysm changes, the impact of the blood on the inner wall of the aneurysm is reduced, and the risk of expansion of the aneurysm is reduced. However, in order to reduce the risk of recurrence of aneurysm, a certain number of coils are usually required to be embolized into aneurysm, so that a better treatment effect can be achieved when a certain embolization rate is achieved. In addition, coil embolization is more suitable for narrow-neck aneurysms, while for wide-neck aneurysms, multiple auxiliary techniques (such as double microcatheter, balloon-assisted embolization, and stent) are required to expand the coil, and these auxiliary techniques also require a certain clinical experience of the physician.

The blood flow guiding device belongs to an intravascular interventional therapy device, has a guiding effect on intravascular blood flow, and mainly blocks blood from further flowing into aneurysm so as to block the aneurysm. The blood flow guiding device makes up the defect of the spring ring in treating wide-neck aneurysm. However, the blood flow guide device belongs to an intravascular interventional treatment device, and in order to prevent thrombosis from forming in blood vessels, patients need to perform a lifelong dual anti-platelet treatment which affects the blood coagulation function of the patients, thereby increasing the risk of postoperative bleeding complications of the patients.

The intratumoral blocking device is a latest aneurysm treatment device at present, can be released into the aneurysm at one time to block the aneurysm, has short operation time and lower requirements on the operation experience of doctors, and does not need to carry out dual antiplatelet treatment for a long time after the operation of a patient. Most of the existing intratumoral plugging devices are processed by woven mesh tubes, and riveting point structures are left when the two ends of the woven mesh tubes are sealed, so that the risk of aneurysm rupture is easily caused by the riveting point structures. In addition, current intratumoral occlusion devices are susceptible to the risk of deformation and dislodgement after being impacted by blood flow.

In summary, the conventional intratumoral plugging device has the problems that the aneurysm is easy to rupture, and deformation and displacement are easy to occur after the aneurysm is impacted by blood flow.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide an aneurysm plugging device, which is not easy to cause aneurysm rupture and is not easy to deform and displace after being impacted by blood flow, aiming at the problems that the aneurysm is easy to break and the aneurysm is easy to deform and displace in the conventional intratumoral plugging device.

An embodiment of the present application provides an aneurysm occlusion device comprising an occlusion body and a support body, the aneurysm occlusion device having a compressed state for being delivered and a deployed state for occluding an aneurysm, the occlusion body and the support body of the aneurysm occlusion device being switched between the compressed state and the deployed state;

when the aneurysm occlusion device is in the expanded state, the occlusion body is in a mesh-woven structure and comprises a main body part and an inner cavity, wherein the main body part is provided with a far end and a near end; the support is located in the lumen and has a distal end and a proximal end; at least one of the distal and proximal ends of the body portion has a necked-in portion recessed into the corresponding end of the body portion; and the closing-in part is connected with the corresponding end of the support body.

In one embodiment, the distal end of the body portion has the cuff portion; and/or, the proximal end of the body portion has the cuff portion.

In an embodiment, the closing-up portion has a first end and a second end, the first end is continuous with the main body portion, the closing-up portion gradually converges from the first end to the second end, and the second end faces the inside of the occlusion body.

In an embodiment, the aneurysm occlusion device further includes a connection ring corresponding to the closing portion, the closing portion has a first end and a second end, the first end is continuous with the main body portion, the closing portion gradually gathers together from the first end to the second end, and the second end gathers together with the corresponding connection ring.

In one embodiment, the occlusion body and/or the support body is made of a shape memory material or an elastic material, and the distal end and the proximal end of the support body are used for supporting the occlusion body respectively.

In one embodiment, when the aneurysm occlusion device is in the deployed state, the outer diameter of the occlusion body gradually increases and then gradually decreases along a direction from the distal end to the proximal end; or the like, or, alternatively,

when the aneurysm occlusion device is in the unfolded state, the occlusion body is of a cylindrical structure.

In an embodiment, the maximum outer diameter of the blocking body is greater than or equal to the maximum outer diameter of the support body.

In one embodiment, the aneurysm occlusion device, in the deployed state, the support body comprises a tubular body extending in a helical direction from a distal end to a proximal end.

In one embodiment, the tubular body is a woven mesh structure or a laser engraved mesh structure; or

The tubular body is formed by spirally winding a spring wire material along the length direction of the tubular body.

In one embodiment, the distal end of the tubular body presents a crimping structure; and/or the proximal end of the tubular body presents a closing-in structure.

In one embodiment, the support body is a spring ring, the spring ring comprises a tubular body, and the tubular body is formed by spirally winding a spring wire along the length direction of the tubular body; when the aneurysm occlusion device is in the deployed state, the spring coil forms a basket.

According to the aneurysm occlusion device, at least one of the proximal end and the distal end of the main body portion is provided with the closing-in portion, and the closing-in portion is recessed in the corresponding end portion of the main body portion, so that when the aneurysm occlusion device is located in an aneurysm, the closing-in portion does not extend out of the corresponding end portion of the main body portion, and therefore the risk of rupture of the aneurysm is reduced. Because the closing-in part is connected with the corresponding end of the support body, the position of the closing-in part can be restrained by the corresponding end of the support body, and the closing-in part can be prevented from extending out of the corresponding end of the main body part due to the impact force of blood, so that the risk of aneurysm rupture is further reduced. In addition, the support body is located the intracavity, and the distal end and the near-end of support body are used for supporting the shutoff body respectively, and consequently, when the blood in the blood vessel flows through the aneurysm, the support of support body can guarantee as far as possible that the shutoff body can not warp and shift because of the impact of blood to guarantee the shutoff effect as far as possible, reduce or avoid the risk of aneurysm relapse.

Drawings

FIG. 1 is a schematic view of an embodiment of an aneurysm occlusion device;

FIG. 2 is a schematic view of the aneurysm occlusion device of FIG. 1 positioned within an aneurysm;

FIG. 3 is a schematic view of another embodiment of an aneurysm occlusion device;

FIG. 4 is a schematic structural view of an aneurysm occlusion device of yet another embodiment;

figures 5-7 are schematic structural views of aneurysm occlusion devices of further embodiments.

The reference numbers illustrate:

a blood vessel 11; an aneurysm 12; a neck opening 13;

a plugging body 110; an inner cavity 101; a main body portion 111; a distal end 111c of the body portion 111; a proximal end 111d of the body portion 111; a necked-in portion 112; a first end 112 a; second end 112b

A support 120;

a connection ring 130.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. 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," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, an embodiment of the present application provides an aneurysm occlusion device. Referring again to fig. 2, the aneurysm 12 protrudes outwardly from the side wall of the patient's blood vessel 11, and the aneurysm occlusion device is positioned inside the aneurysm 12 when used to treat the aneurysm 12 of the patient, such that one end of the aneurysm occlusion device is adjacent the top of the aneurysm and the other end is adjacent the neck of the aneurysm. For purposes of the description below, the description will be used with reference to "proximal" and "distal", where proximal refers to the end that is relatively close to the operator's hand during an aneurysm treatment procedure and distal refers to the end that is relatively far from the operator's hand during an aneurysm treatment procedure.

The aneurysm occlusion device comprises an occlusion body 110 and a support 120. The aneurysm occlusion device has a compressed state for being delivered and an expanded state for occluding the aneurysm 12, and is switchable between the compressed state and the expanded state by deformation of the occlusion body 110 and the support body 120.

When the aneurysm occlusion device is used for treating an aneurysm 12 of a patient, the aneurysm occlusion device may be delivered to the interior of the aneurysm 12 of the patient by means of a microcatheter (not shown) and a push rod (not shown). Specifically, by causing the occlusion body 110 and the support body 120 to respectively undergo compressive deformation, and switching the aneurysm occlusion device from the expanded state to the compressed state, the aneurysm occlusion device can be compressed into an elongated structure, and can be easily placed in a microcatheter. A delivery channel is established in the blood vessel 11 of the patient through the microcatheter, and the aneurysm occlusion device is pushed out of the outlet of the microcatheter along the microcatheter through the push rod, so that the aneurysm occlusion device is released into the aneurysm 12.

When the aneurysm occlusion device is released inside the aneurysm 12, as shown in fig. 2, the aneurysm occlusion device is switched from the compressed state to the expanded state without being constrained by the microcatheter. When the aneurysm occlusion device is in an expanded state, the occlusion body 110 is in a mesh-woven structure. The occlusion body 110 comprises a main body part 111 and an inner cavity 101, wherein the inner cavity 101 is located in the main body part 101, so that the inner cavity 101 enables the occlusion body 110 to have a certain expansion volume, and then the occlusion body 110 can sufficiently occupy the space inside the aneurysm 12 through the inner cavity 101, thereby playing a role in sufficiently occluding the aneurysm 12. When the aneurysm occlusion device is switched from the expanded state to the compressed state, the volume of the lumen 101 decreases.

Specifically, the occlusion body 110 is a woven mesh structure woven by wires, and therefore, the wires at the end of the main body portion 111 need to be bundled and fixed together for closing, so as to form the closing portion 112, i.e., the wires of the main body portion 111 and the wires of the closing portion 112 are continuously integrated. In the present embodiment, the distal end 111c and the proximal end 111d of the main body portion 111 are respectively provided with a closing-in portion 112, i.e. the distal end 111c of the main body portion 111 is closed by its corresponding closing-in portion 112, and the proximal end 111d of the main body portion 111 is closed by its corresponding closing-in portion 112.

The closing-in portion 112 is recessed in the corresponding end of the main body portion 111. That is, in the present embodiment, the necked-in portion 112 at the distal end 111c of the main body portion 111 is recessed in the distal end 111c of the main body portion 111, and the necked-in portion 112 at the proximal end 111d of the main body portion 111 is recessed in the proximal end 111d of the main body portion 111. As shown in fig. 2, since the closing portion 112 is recessed in the corresponding end of the main body portion 111, when the aneurysm occlusion device is located at the aneurysm 12, the closing portion 12 does not protrude out of the corresponding end of the main body portion 111, and the closing portion 12 is not easy to pierce the aneurysm 12, thereby reducing the risk of rupture of the aneurysm 12.

The support 120 is located within the lumen 101. The closing-in portion 112 is connected to the corresponding end of the support body 120. In the present embodiment, that is, the closing-in portion 112 at the distal end 111c of the main body portion 111 is connected to the distal end of the support body 120, and the closing-in portion 112 at the proximal end 111d of the main body portion 111 is connected to the proximal end of the support body 120, so that the closing-in portion 112 at the distal end 111c of the main body portion 111 is constrained by the distal end of the support body 120, and the closing-in portion 112 at the proximal end 111d of the main body portion 111 is constrained by the proximal end of the support body 120, thereby effectively constraining the position of the closing-in portion 112, preventing the closing-in portion 112 from protruding out of the corresponding end of the main body portion 111 due to the impact force of blood, and further reducing the risk of rupture of the aneurysm 12.

In addition, since the necked-in portion 112 at the distal end 111c of the main body portion 111 is connected to the distal end of the support body 120, the distal end of the support body 120 can support the necked-in portion 112 at the distal end 111c of the main body portion 111, thereby achieving support of the distal end of the occluding body 110. Similarly, since the close-up portion 112 at the proximal end 111d of the main body portion 111 is connected to the proximal end of the support body 120, the proximal end of the support body 120 can support the close-up portion 112 at the proximal end 111d of the main body portion 111, thereby supporting the proximal end of the occlusion body 110. Therefore, when the blood in the blood vessel 11 flows through the aneurysm 12, the support of the support 120 can ensure as much as possible that the occlusion body 110 will not deform and shift due to the impact of the blood, so as to ensure as much as possible the occlusion effect and reduce or avoid the risk of recurrence of the aneurysm 12.

In other embodiments, the binding-off portion may be one, for example, the binding-off portion is provided at the distal end of the main body portion, and the binding-off portion is not provided at the proximal end, so that the binding-off portion at the distal end of the main body portion is recessed at the distal end of the main body portion, and the binding-off portion at the distal end of the main body portion is connected to the distal end of the support body, and in this case, the proximal end of the support body can be directly connected to the proximal end of the main body portion. Similarly, in another embodiment, it is also possible that the proximal end of the main body portion has a closing-in portion, and the distal end does not have a closing-in portion, so that the closing-in portion at the proximal end of the main body portion is recessed in the proximal end of the main body portion, and the closing-in portion at the proximal end of the main body portion is connected to the proximal end of the support body, and at this time, the distal end of the support body can be directly connected to the distal end of the main body portion.

In the aneurysm occlusion device described above, at least one of the proximal end and the distal end of the main body portion 111 has the closing portion 112, and the closing portion 112 is recessed in the corresponding end of the main body portion 111, so that when the aneurysm occlusion device is positioned at the aneurysm 12, the closing portion 12 does not protrude beyond the corresponding end of the main body portion 111, thereby reducing the risk of rupture of the aneurysm 12. Since the closing-in portion 112 is connected to the corresponding end of the support body 120, the position of the closing-in portion 112 can be constrained by the corresponding end of the support body 120, and the closing-in portion 112 can be prevented from protruding out of the corresponding end of the main body portion 111 due to the impact force of blood, thereby further reducing the risk of rupture of the aneurysm 12. In addition, the support body 120 is located in the inner cavity 101, and the distal end and the proximal end of the support body 120 can respectively support the occlusion body 110, so that when blood in the blood vessel 11 flows through the aneurysm 12, the support of the support body 120 can ensure that the occlusion body 110 is not deformed and displaced due to the impact of the blood, so as to ensure the occlusion effect as much as possible and reduce or avoid the risk of recurrence of the aneurysm 12.

Referring to fig. 1, in one embodiment, the closing-in portion 112 has a first end 112a and a second end 112 b. The first end 112a is an end continuous with the main body portion 111. When knitting the occluding body 110 using a portion of the filament material to the end of the main body portion 111, the closing-up portion 112 may be knitted with the remaining filament material continuous with the portion without interruption, i.e., the closing-up portion 112 may be knitted from the first end 112 a. The necked-in portion 112 may be woven from a first end 112a to a second end 112 b. The closing-in portion 112 gradually converges from the first end 112a to the second end 112b, i.e., the diameter of the closing-in portion 112 gradually becomes smaller, so that the filaments of the closing-in portion 112 are gathered and fixed together at the second end 112 b. It can be seen that the second end 112b is the gathering end of the filament of the binding off portion 112, and therefore, when the binding off portion 112 is connected with the corresponding end of the support 120, the binding off portion 112 is connected with the corresponding end of the support 120 through the second end 112b, thereby facilitating the connection of the binding off portion 112 with the support 120.

As shown in fig. 1, in an embodiment, the second end 112b faces the inside of the occluding body 110, i.e., the inside of the lumen 101. It will be appreciated that, since the converging portion 112 gradually converges from the first end 112a to the second end 112b, the second end 112b is relatively sharp and pointed compared to the first end 112 a. Thus, in this embodiment, the second end 112b is directed towards the inside of the occlusion body 110, i.e. the tip is directed inwards, so that the second end 112b can be further prevented from puncturing the aneurysm, further reducing the risk of rupture of the aneurysm 12.

In other embodiments, the second end of the closing-in portion may also be towards the outside of the occlusion body (i.e. towards the outside of the inner cavity), as long as the closing-in portion is entirely recessed in the corresponding end of the main body portion, the second end of the closing-in portion still does not protrude out of the corresponding end of the main body portion, so that the aneurysm is not easily punctured, and the risk of rupture of the aneurysm can be reduced to some extent.

Referring to fig. 1 and 2, in one embodiment, the aneurysm occlusion device further comprises a connection ring 130 corresponding to the ostium portion 112. The second ends 112b converge in a corresponding connecting ring 130. Specifically, the filament of the cuff portion 112 may be bonded to the connecting ring 130 at the second end 112b by an adhesive (including but not limited to UV glue, epoxy glue, etc.), and the filament of the cuff portion 112 may be fixed to the connecting ring 130 at the second end 112b by welding.

In one embodiment, the occluding body 110 is made of a shape memory material so as to be deformable to facilitate switching of the aneurysm occlusion device between a compressed state and a deployed state. Specifically, the shape memory material may be a metal having a shape memory function, for example, nickel titanium (Ni-Ti) alloy, nickel cobalt nickel alloy (Ni-Ti-Co), double-layered composite wire (Ni-Ti @ Pt), or the like. The shape memory material may also be a polymer material having a shape memory function, such as Polydioxanone (PDO), (lactide-epsilon-caprolactone) copolymer (PLC), and the like.

In one embodiment, when the mesh-woven structure of the occlusion body 110 is woven, the filament diameter of the adopted filament is between 0.0008 inch and 0.002 inch, and the number of the woven filaments is between 48 and 144.

In an embodiment, when the aneurysm occlusion device is in a deployed state, along a direction from the distal end to the proximal end (i.e., a YY' direction in fig. 2), the outer diameter of the occlusion body 110 gradually increases and then gradually decreases, that is, the occlusion body 110 has a shape that gradually increases from the distal end to the middle and gradually decreases from the middle to the proximal end, and the shape of the occlusion body 110 can be well matched with the shape of the aneurysm 12, so that the occlusion effect is good. In addition, the occlusion body 110 becomes thicker from the distal end to the middle, so that the middle part of the occlusion body 110 is thicker, and the occlusion body 110 can be prevented from moving out of the aneurysm 12 from the aneurysm neck 13 of the aneurysm 12 as much as possible, thereby ensuring the position stability of the aneurysm occlusion device when treating the aneurysm 12 as much as possible.

As shown in fig. 1, in the present embodiment, the plugging body 110 is spherical as a whole.

In other embodiments, the plugging body may also take other shapes such as an ellipsoid.

In one embodiment, the support body 120 is made of a shape memory material so as to be deformable to facilitate switching of the aneurysm occlusion device between a compressed state and a deployed state. Specifically, the shape memory material may be a metal having a shape memory function, for example, nickel titanium (Ni-Ti) alloy, nickel cobalt nickel alloy (Ni-Ti-Co), double-layered composite wire (Ni-Ti @ Pt), or the like. The shape memory material may also be a polymer material having a shape memory function, such as Polydioxanone (PDO), (lactide-epsilon-caprolactone) copolymer (PLC), and the like.

Referring to fig. 1 and 2, in an embodiment, when the aneurysm occlusion device is in a deployed state, the support body 120 comprises a tubular body extending in a helical direction from a distal end to a proximal end, such that the tubular body can be approximately regarded as a helical spring structure with an axial direction of the helical spring structure in a distal end to proximal end direction (YY'), and further, the tubular body (i.e., the support body 120) can provide reliable elastic force to the distal end and the proximal end of the occlusion body 110 so as to reliably support the occlusion body 110.

Referring to fig. 1 and 2, in one embodiment, the outer diameter of the tubular body tapers from the middle to the ends in the distal to proximal direction (YY'). I.e. the tube diameter of the tubular body becomes gradually thicker from the distal end to the middle and becomes gradually thinner from the middle to the proximal end.

When the aneurysm plugging device is switched from the expansion state to the compression state, the two ends of the tubular body are thin, and the middle of the tubular body is thick, so that the two ends of the aneurysm plugging device are thin, and the middle of the aneurysm plugging device is thick, the end part of the aneurysm plugging device is conveniently placed into the micro catheter, and the thick part in the middle of the aneurysm plugging device is conveniently gradually pushed into the micro catheter by the pushing rod. When the aneurysm plugging device is pushed out of the outlet of the micro-catheter along the micro-catheter through the pushing rod, the end part of the aneurysm plugging device is thin, so that the end part of the aneurysm plugging device is conveniently pushed out of the outlet of the micro-catheter in advance, and the thick part in the middle of the aneurysm plugging device is conveniently pushed out of the micro-catheter gradually by the pushing rod.

In other embodiments, the support body is not limited to being tubular, but may be in other shapes, and is not limited thereto.

In an embodiment, the tubular body is a woven mesh structure, i.e. is woven by using silk materials. Specifically, the wire diameter of the wire adopted by the mesh weaving structure is between 0.0008 inch and 0.002 inch, and the number of the woven wires is between 48 and 144.

In other embodiments, the tubular body may be a laser engraved mesh structure formed by laser engraving.

In one embodiment, the tubular body is a braided mesh structure formed by braiding wires, so that the ends of the wires need to be bundled and fixed together for closing. In this embodiment, the distal end of the tubular body has a binding-off structure, so that the wires at the distal end of the tubular body are bundled and fixed together to form a connection point, thereby facilitating the connection between the distal end of the tubular body (i.e. the distal end of the support body 120) and the binding-off portion 112 at the distal end of the main body portion 111, or facilitating the connection between the distal end of the tubular body (i.e. the distal end of the support body) and the distal end of the occlusion body directly.

In one embodiment, the tubular body is a braided mesh structure formed by braiding wires, so that the ends of the wires need to be bundled and fixed together for closing. In this embodiment, the proximal end of the tubular body is in a binding-off structure, so that the filaments of the proximal end of the tubular body are bundled and fixed together to form a connection point, thereby facilitating the connection between the proximal end of the tubular body (i.e. the proximal end of the support body 120) and the binding-off portion 112 at the proximal end of the main body portion 111, or facilitating the connection between the proximal end of the tubular body (i.e. the proximal end of the support body) and the proximal end of the occlusion body directly.

In an embodiment, the maximum outer diameter of the occluding body 110 is greater than or equal to the maximum outer diameter of the support body 120, so that it can be ensured that the inner cavity 101 of the occluding body 110 can accommodate the support body 120.

Specifically, in the present embodiment, since the outer diameter of the occluding body 110 is gradually increased and then gradually decreased in the distal-to-proximal direction (i.e., the YY 'direction in fig. 1), the maximum outer diameter of the occluding body 110 is located at a substantially middle position of the occluding body 110 in the distal-to-proximal direction (YY'). Since the tubular body of the support body 120 extends in the helical direction, in the present embodiment, the outer diameter of the support body 120 refers to the helical outer diameter of the tubular body (rather than the tube diameter of the tubular body itself), and then the maximum outer diameter of the support body 120 is the maximum helical outer diameter of the tubular body. Because the maximum outer diameter of the support body 120 is not greater than the maximum outer diameter of the occluding body 110, the support body 120 can be prevented from excessively squeezing the side wall of the aneurysm 12, and the risk of rupture of the aneurysm 12 can be reduced.

In one embodiment, the maximum outer diameter of the occluding body 110 is between 3mm and 25mm, and the maximum outer diameter of the support body 120 is between 3mm and 25 mm.

Referring to fig. 3, another embodiment of the present application further provides an aneurysm occlusion device. The structure of the aneurysm occlusion device is basically the same as that of the aneurysm occlusion device of any of the above embodiments, and the description of the same parts is omitted. The following focuses on the differences of the aneurysm occlusion device of this embodiment.

In this embodiment, the tubular body is formed by spirally winding a spring wire along the length direction of the tubular body. Specifically, the support body 120 may be prepared by helically winding a spring wire around a first mandrel in an axial direction of the first mandrel, thereby forming the tubular body described above; and spirally winding the tubular body on a second mandrel along the axial direction of the second mandrel, and carrying out shaping treatment, so that the shaped tubular body extends in the spiral direction from the far end to the near end. When the aneurysm plugging device is in a compressed state, the shaped tubular body can be stretched, so that the aneurysm plugging device can be conveniently placed into a micro catheter. When released from the microcatheter, the support 120 naturally returns to the shape of the shaped tubular body. In some embodiments, the second mandrel may be cylindrical or may be a regular/irregular cylinder with two thin ends and a thick center. The maximum outer diameter of the cylindrical body is 1/2-1 of the maximum outer diameter of the blocking body.

In this embodiment, the diameter of the spring wire wound around the tubular body is between 0.000001 inches and 0.0008 inches. The spring wire material for winding the tubular body is a metal wire, and particularly, the material of the metal wire comprises but is not limited to platinum (Pt), tungsten (W) and platinum-tungsten alloy (Pt-W).

Referring to fig. 4, another embodiment of the present application further provides an aneurysm occlusion device. The structure of the aneurysm occlusion device is basically the same as that of the aneurysm occlusion device of any of the above embodiments, and the description of the same parts is omitted. The following focuses on the differences of the aneurysm occlusion device of this embodiment.

In this embodiment, the support 120 is a spring coil. The spring ring includes a tubular body. The tubular body is formed by spirally winding a spring wire material along the length direction of the tubular body. As shown in fig. 4, the coil forms a basket when the aneurysm occlusion device is in the deployed state. The spring coil may be prepared by helically winding a spring wire around a mandrel in an axial direction of the mandrel to form a tubular body; and winding the tubular body on a die according to a preset shape (namely the shape of the spring ring when the spring ring is formed into a basket), and carrying out shaping treatment to form the spring ring of the basket. When the aneurysm occlusion device is in a compressed state, the coil spring of the basket can be compressed, so that the aneurysm occlusion device can be conveniently placed in the microcatheter. When the support 120 (i.e., the coil) is released from the microcatheter, it will naturally return to the shape of the coil in the basket.

The structure of the spring ring when forming the basket can be a hexahedral structure and the like, and specific reference can be made to the prior art, which is not described herein again.

In this embodiment, the wire diameter of the spring wire around which the coil is wound is between 0.000001 inches and 0.0008 inches. The spring wire material for winding the spring ring is a metal wire, and particularly, the material of the metal wire comprises platinum (Pt), tungsten (W) and platinum-tungsten alloy (Pt-W) but is not limited to.

Referring to fig. 4, in the present embodiment, since the supporting body 120 is a spring ring, the maximum outer diameter of the supporting body 120 is the maximum outer diameter of the spring ring when the spring ring is formed into a basket.

Referring to fig. 5 to 7, the aneurysm occlusion device of further embodiments of the present application has substantially the same structure as the aneurysm occlusion device of any of the above embodiments, and the description of the same parts is omitted. The following description focuses on the differences of the aneurysm occlusion device of the present embodiment.

In the embodiment shown in fig. 5 to 7, the aneurysm occlusion device has a cylindrical structure 110 in the deployed state, and specifically, the structure may be a cylinder, a prism, an elliptic cylinder, or the like.

In the present embodiment, the axial height of the cylindrical structure of the plugging body 110 is between 3mm and 25 mm.

The support body 120 of the embodiment shown in fig. 5 has exactly the same structure as the support body 120 of the embodiment shown in fig. 1. The support body 120 of the embodiment shown in fig. 6 has exactly the same structure as the support body 120 of the embodiment shown in fig. 3. The support body 120 of the embodiment shown in fig. 7 has exactly the same structure as the support body 120 of the embodiment shown in fig. 4.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the utility model, and these changes and modifications are all within the scope of the utility model. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. An aneurysm occlusion device comprising an occlusion body and a support body, the aneurysm occlusion device having a compressed state for delivery and a deployed state for occluding an aneurysm, the occlusion body and the support body of the aneurysm occlusion device being switchable between the compressed state and the deployed state;

when the aneurysm occlusion device is in the expanded state, the occlusion body is in a mesh-woven structure and comprises a main body part and an inner cavity, wherein the main body part is provided with a far end and a near end; the support is located in the lumen and has a distal end and a proximal end; at least one of the distal and proximal ends of the body portion has a necked-in portion recessed into the corresponding end of the body portion; and the closing-in part is connected with the corresponding end of the support body.

2. The aneurysm occlusion device of claim 1, wherein the distal end of the body portion has the necked-down portion; and/or, the proximal end of the body portion has the cuff portion.

3. The aneurysm occlusion device of claim 1, wherein the necked-down portion has a first end and a second end, the first end being continuous with the main body portion, the necked-down portion converging from the first end to the second end, the second end facing inward of the occlusion body.

4. The aneurysm occlusion device of claim 1, further comprising a connecting ring corresponding to the necked-in portion, the necked-in portion having a first end and a second end, the first end being continuous with the body portion, the necked-in portion converging from the first end to the second end, the second end converging to the corresponding connecting ring.

5. The aneurysm occlusion device of claim 1, wherein the occlusion body and/or the support body are made of a shape memory or elastic material, and wherein the distal and proximal ends of the support body are adapted to support the occlusion body.

6. The aneurysm occlusion device of claim 1,

when the aneurysm occlusion device is in the unfolding state, along the direction from the far end to the near end, the outer diameter of the occlusion body is gradually increased and then gradually decreased; or

When the aneurysm occlusion device is in the unfolded state, the occlusion body is of a cylindrical structure.

7. The aneurysm occlusion device of claim 1, wherein a maximum outer diameter of the occlusion body is greater than or equal to a maximum outer diameter of the support body.

8. The aneurysm occlusion device of claim 1, wherein the support body comprises a tubular body extending in a helical direction from a distal end to a proximal end when the aneurysm occlusion device is in the deployed state.

9. The aneurysm occlusion device of claim 8,

the tubular body is of a woven net structure or a laser engraving net structure; or

The tubular body is formed by spirally winding a spring wire material along the length direction of the tubular body.

10. The aneurysm occlusion device of claim 8, wherein the distal end of the tubular body presents a cinched configuration; and/or the proximal end of the tubular body presents a closing-in structure.

11. The aneurysm occlusion device of claim 1, wherein the support body is a spring coil comprising a tubular body formed from a spring wire helically wound along a length of the tubular body; when the aneurysm occlusion device is in the deployed state, the spring coil forms a basket.

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