WO2023143586A1

WO2023143586A1 - Intravascular intervention device

Info

Publication number: WO2023143586A1
Application number: PCT/CN2023/073736
Authority: WO
Inventors: 康尼夫布伦丹; 华新; 沈泉
Original assignee: 苏州徕瑞医疗技术有限公司
Priority date: 2022-01-29
Filing date: 2023-01-29
Publication date: 2023-08-03
Also published as: CN116549056A

Abstract

Provided is an intravascular intervention device, comprising a support member (1) and an elongated control member (2), wherein the support member (1) comprises a support main body (11) and a neck portion (12) located at the proximal side of the support main body (11), and the support main body (11) converges at the neck portion (12); the neck portion (12) is provided with a front surface and a back surface opposite to each other; a hole (13) penetrating through the front surface and the back surface is formed in the neck portion (12); the distal end portion of the elongated control member (2) comprises an engagement portion engaged with the neck portion (12) of the support member (1); the engagement portion comprises a first segment, a second segment, and a third segment connecting the first segment and the second segment; the third segment extends through the hole (13), and the first segment and the second segment extend in the proximal side direction from the hole (13) on the front surface and the back surface of the neck portion (12), respectively, thereby engaging with the neck portion (12). The stable connection of the support member (1) and the elongated control member (2) is effectively ensured, and the performance of the support member (1) is not affected; the device has a simple structure and is easy to manufacture and assemble.

Description

Intravascular interventional device

Cross-references to related applications

This application claims the priority of a Chinese patent application with an application date of 2022.01.29, an application number of CN202210112452.3, and an invention title of "Intravascular Interventional Device", and the entire contents thereof are hereby incorporated by reference into this disclosure.

technical field

The invention relates to an intravascular intervention device.

Background technique

The treatment of some important diseases will involve interventional surgery, including but not limited to thrombus extraction. In this operation, the interventional component (such as a stent component) is usually delivered to the lesion site, and the interventional component is combined with the thrombus and then dragged out of the body.

Devices used in interventional procedures generally include a manipulating member and an intervening member connected to the manipulating member (eg, a guide wire). Various procedures can be performed by manipulating the intervening components. In some examples, the stent member can be manipulated by a physician from a location outside the body using the manipulation member. Thus, the manipulation member may extend from a location outside the body to a treatment location inside the body. The steering member may extend from a location outside the body to the treatment location through the catheter. The bracket member can be connected to the handling member in a number of ways.

A reliable and stable connection between the bracket member and the manipulation member is very important. Improper or unreliable connection between the two may separate the stent component from the manipulation component, causing the stent component to fall off in the blood vessel and be uncontrolled or irretrievable, which is extremely dangerous for the patient.

At the same time, considering the size of the blood vessel and the size of the delivery device such as the catheter for delivering the interventional component in the blood vessel, the connection structure between the stent component and the manipulation component should not be too complicated.

To sum up, it is necessary to design an intravascular interventional device that has a simple structure and can ensure a reliable connection between the stent component and the manipulation component.

Contents of the invention

The purpose of the present invention is to provide an intravascular interventional device to ensure reliable connection between the stent component and the manipulation component without affecting the performance of the stent component, and meanwhile, the structure is simple and easy to manufacture and assemble.

To achieve the above purpose, according to the first aspect of the present invention, the present invention relates to an intravascular interventional device. The device comprises: a stent member comprising a stent body and a neck positioned proximal to the stent body, the stent body converging at the neck; the neck has opposite fronts and backs; There are holes through the front and back sides; an elongated manipulation member having a distal end comprising a joint engaging the neck of the stent member; the joint comprising a first segment, a second segment, and a connection a third segment of the first segment and the second segment; the third segment extending through the hole, the first segment and the second segment respectively at the neck Front and back sides extend proximally from the aperture to engage the neck.

Preferably, an open slot is also provided in the neck, and the open slot extends from the distal end of the hole to the distal end of the neck, and the hole, the open slot and the bracket The closest meshes of the subject are joined together.

Preferably, an open slot is further provided in the neck, the open slot extends from the proximal end of the hole to the proximal end of the neck, and the hole and the open slot are integrated.

Preferably, the width of the opening groove is smaller than the diameter of the third segment of the joint part.

According to a second aspect of the invention, the invention relates to an endovascular interventional device. The device comprises: a stent member comprising a stent body and a neck positioned proximally of the stent body, the stent body converges on the neck; the proximal end and the distal end of the neck respectively have A notch formed by the central depression of the neck; an elongate manipulation member having a distal end comprising a joint engaging the neck of the stent member; the joint comprising a first segment, a second segment, and a connection a third segment of the first and second segments; the third segment extending through a notch in the distal end of the neck, the first segment and the second Segments extend in a proximal direction from a notch in the distal end of the neck on the front and back of the neck, respectively, to engage the neck.

Preferably, at a notch at the proximal end of the neck, the first and second segments meet or intertwine.

Preferably, the joint portion of the elongated manipulation member further comprises a fourth segment and a fifth segment; the fourth segment connects the first segment and the fifth segment and extends through the neck The notch at the proximal end of the neck; the fifth segment extends in the distal direction from the notch at the proximal end of the neck at the back of the neck.

Preferably, the notch is V-shaped, parabolic, square or semicircular.

In the intravascular interventional device according to the first aspect and the second aspect of the present invention, preferably, a sleeve may be further included, and the sleeve circumferentially surrounds the entire periphery formed by joining the neck portion and the joint portion.

In the intravascular interventional device according to the first aspect and the second aspect of the present invention, preferably, a fixing cap may be further included, and the fixing cap covers the first segment of the joint part and the The front of the neck where the first segment is located; wherein, the end of the first segment away from the third segment is a free end, and the end of the second segment away from the third segment is connected to The main body portions of the elongated manipulation members are connected.

Preferably, the sleeve or the fixing cap is welded to the neck and the joint.

Compared with the prior art, the present invention has the following advantages:

1. The holes and opening grooves arranged in the neck at the proximal end of the stent body are integrated with the grid unit at the nearest side of the stent body, which can increase the (marginal) effect of the actual length of the grid at the most end of the stent body, but This does not have any adverse effect on the performance of the device. In addition, a rounded feature at the proximal end of the open slot will have a favorable effect on the fatigue performance of this area, where the rounded feature refers to the increased radius caused by the hole, which can be circular, oval, approximately circular or other suitable the shape of the curve;

2. The fixed cap and the sleeve make the joint between the bracket component and the slender operating component more firm and reliable. At the same time, the design of the fixing cap makes the joint portion smaller in size, further simplifies the assembly process, and saves assembly time.

3. The design of the notch at the proximal end and the distal end of the neck of the stent member can respectively ensure the engagement between the guide wire and the stent during the pull-back traction process and the push process through a simple structure; the notch The arc-shaped design of the bottom can reduce the wear when the joint part is in contact with the neck; the design of the two notches actually reduces the effective length of the neck, so that the overall size of the joint part and the neck can be made smaller;

In a word, the present invention can effectively ensure the stable connection between the bracket component and the bracket manipulation component without affecting the performance of the bracket component, and at the same time has a simple structure and is easy to manufacture and assemble.

Description of drawings

The drawings illustrate embodiments of the invention by way of example and not limitation, and in which:

Fig. 1 shows a schematic diagram of a part of the proximal side of a stent component in an intravascular interventional device according to Embodiment 1 of the present invention.

Fig. 2 shows a schematic diagram of an assembled intravascular intervention device according to Embodiment 1 of the present invention.

Fig. 3 shows a schematic diagram of an assembled intravascular interventional device according to Embodiment 2 of the present invention.

Fig. 4 shows a schematic diagram of the endovascular intervention device according to the third embodiment of the present invention after the neck of the stent member is engaged with the joint portion of the manipulation member.

Fig. 5 shows a schematic diagram of a part near the stent component in the intravascular interventional device according to Embodiment 4 of the present invention.

Fig. 6 shows a schematic diagram of a part near the stent component in the intravascular interventional device according to Embodiment 5 of the present invention.

Fig. 7 shows a schematic diagram of an assembled intravascular interventional device according to Embodiment 5 of the present invention.

Detailed ways

The technical solution of the present invention will be further described in detail through the following examples in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the embodiments described herein, the preferred methods, devices, and materials are described herein.

Specific embodiments of the present invention will now be described in detail with reference to the drawings, wherein like reference numerals indicate identical or functionally similar elements. The terms "distal", "distal" or "proximal", "proximal" in the following description refer to a position or direction relative to the physician. "Distal" or "distal" refers to a location away from the physician. "Proximal" or "proximal" is a location near or toward the physician. Orientation terms such as "upper" and "lower" are only for the convenience of describing the relative positional relationship.

The present invention relates to intravascular interventional devices. As shown in FIGS. 1-5 , the device generally comprises a frame member 1 and an elongated manipulation member 2 . Wherein, the stent component 1 includes a stent body 11 and a neck 12 located near the stent body 11 . The stent body 11 generally includes a multi-grid structure formed by connecting and combining multiple segments of metal struts. The bracket body 11 converges on the neck 12 . The distal end of the elongate manipulating member 2 comprises a joint. The neck 12 of the bracket member 1 and the junction of the elongate manipulation member 2 may be joined or connected together. The stent component 1 may comprise elements for performing endovascular interventions. In addition, the above-mentioned intravascular interventional device may also include one or more fixing members, such as fixing cap 4 or sleeve 3 for keeping the joint portion of the elongated manipulation member 2 connected with the neck 12 of the stent member 1 .

In some embodiments, the neck 12 of the bracket member 1 and the junction of the elongate manipulation member 2 may be substantially permanently joined or connected together. In some embodiments, the neck portion 12 of the bracket member 1 is detachably engaged or connected with the joint portion of the elongated manipulation member 2 .

The elongated manipulation member 2 of the present invention may include a guide wire, and may further include a hypotube, a coil, or a combination thereof. The length of the guidewire is sufficient to extend through the blood vessel from a location outside the patient's body to a treatment site within the patient's body. The guide wire is made of Nitinol or other suitable alloy. In some embodiments, the guidewire may be monolithic or formed from multiple connected segments. The guidewire gradually changes along its length The thin, smaller diameter portion faces the distal end of the guidewire.

The neck 12 of the stent member 1 and the junction of the elongate manipulating member 2 may be sized after engagement for delivery by catheter to a treatment site in a patient.

The intravascular interventional device of the present invention will be described in detail below through different embodiments.

Embodiment one

Fig. 1 shows a schematic view of the proximal end of the stent body 11 and the neck 12 of the stent component 1 of the first embodiment.

As shown in Fig. 1, the neck 12 of the bracket member 1 has a relative front and back (for example, shown in Fig. 1 is the front of the neck 12), and the neck 12 is provided with a hole 13 running through the front and back of the neck 12 . This hole 13 is located in the distal part of the neck 12 . The hole 13 is sized and shaped to allow the distal end of the elongated steering member 2 (ie guide wire) to extend therethrough. That is, the diameter of the hole 13 allows the passage of a guide wire. Furthermore, an open slot 14 is provided in the neck 12 and extends from the distal end of the hole 13 to the distal end of the neck 12 . The opening slot 14 is integrated with the nearest grid unit of the support member 1 . The neck 12 of the stent member 1 has the effect of the above-mentioned design that the top of the grid unit at the proximal end of the stent body 11 is actually the above-mentioned "hole 13", which has the effect of increasing the actual length of the grid at the proximal end of the stent body 11 ( marginal) effect, but this does not have any adverse effect on the performance of the structure. Furthermore, the increase in radius caused by the hole 13 at the proximal end of the open slot 14 will have a favorable effect on the fatigue behavior of this area.

In this embodiment, the hole 13 is a circular hole, but this is only a preferred manner. In other embodiments, the shape of the hole 13 can also be designed as oval, approximately circular or other suitable curved shapes according to actual needs.

In addition, it should be understood that although it is mentioned in the above description of this embodiment that the hole 13 is located at the distal portion of the neck 12, this is only a preferred manner. In other embodiments, the hole 13 can also be set at the middle position or near the proximal end of the neck 12 of the bracket member 1 according to actual needs or different situations.

Fig. 2 shows a schematic view of the assembled device of the first embodiment.

As shown in Fig. 2, the junction portion at the distal end of the elongated manipulation member 2 (ie guide wire) of the device includes a first section, a second section and a first section connecting the first section and the second section. Three segments. Wherein, the third segment extends through the hole 13 in the neck 12, and the first segment and the second segment extend from the hole 13 to the proximal direction of the hole 13 on the front and back of the neck 12 respectively, so as to be compatible with The neck 12 of the bracket member 1 engages. For ease of description, the default first segment extends on the front of the neck 12, the second segment extends on the back of the neck 12, and the end of the first segment away from the hole 13 is a free end, and the second segment is far away from the hole. One end of 13 is connected with the main body part of the elongated manipulation member 2 . but Those skilled in the art should be able to understand that the above distinction is only for the purpose of illustration, and cannot be regarded as a substantive limitation on the front and back of the neck 12 and the first segment and the second segment. For example, it can be considered that the first segment extends at the back of the neck 12, and the second segment extends at the front of the neck 12; The end of the segment remote from the hole 13 is connected to the main part of said elongated manipulating member 2 .

Also shown in FIG. 2 is a sleeve 3 for maintaining engagement or connection of the engagement portion of the elongate manipulation member 2 and the neck 12 of the bracket member 1 . The sleeve 3 circumferentially surrounds the integral periphery formed by the engagement of the neck 12 and the joint. The sleeve 3 is preferably a metal sleeve.

As far as the assembly connection is concerned, the distal end of the guide wire passes through the hole 13 in FIG. Put on the metal sleeve and crimp it. This will maintain a firm connection of the guide wire to the stent member 1 . If desired (although not necessary), spot welding can be performed at this location to ensure the firmness of the connection between the guide wire and the stent member 1 .

More specifically, as a first step, the sleeve 3 is passed through the distal end of the guide wire and moved towards its proximal end by any distance so as not to interfere with the next few assembly steps. The finely ground distal end of the guide wire is then inserted into the bore 13 at the proximal end of the stent body 11 . Next, use forceps to bend the distal end of the guidewire into a "u" shape so that the guidewire can be folded over to form the junction. It may be necessary to additionally squeeze the u-shaped proximal end of the guidewire to ensure that it remains small at the proximal end of the stent body 11 . Finally, the sleeve 3 is slid distally onto the whole formed by the joint of the u-shaped joint of the guide wire and the neck 12 of the bracket member 1 . Use the pliers again to grip the sleeve 3 and make sure it stays in place. Spot welds can be applied if required to ensure the ultimate firmness of the connection.

As far as the design is concerned, it must be ensured that the distal end of the guide wire is ground to a diameter small enough that it can pass through the hole 13 and bend to form the junction. For example, the distal end of the guidewire can be milled to a diameter of 0.004 inches and the diameter of the hole 13 on the proximal end of the stent is 0.005 inches. However, it should be understood that the diameter of the distal end of the guide wire and the diameter of the hole 13 can also be adjusted to other values according to actual conditions and requirements.

At the same time, the width of the open slot 14 is preferably smaller than the diameter of the distal end of the guide wire, or at least ensure that the width of the open slot 14 is smaller than the diameter of the third segment extending through the hole 13 in the junction, so as to prevent this third The segment moves distally along the open slot 14 , thereby disengaging the junction from the neck 12 . In other cases, for example, when the fastening connection between the joint part and the neck 12 can be ensured (for example, by means of fasteners and/or welding processes, etc.), the width of the opening groove 14 can also be equal to or greater than that of the joint part. The diameter of the third segment in .

Also, from a material standpoint, it must be ensured that the guidewire is malleable enough to allow it to be bent to such tight radii without breaking. This can be achieved by the Nitinol material (production The material of the guide wire) is achieved by appropriate heat treatment.

Embodiment two

Fig. 3 shows another embodiment of an endovascular intervention device. Similar to the first embodiment, a hole 13 is provided in the neck 12 of the bracket member 1 . The hole 13 is sized and shaped to allow the distal end of the guidewire to extend therethrough.

The difference from the first embodiment is that the sleeve 3 as the fixing member is replaced by a fixing cap 4 . Specifically, in the second embodiment, the neck 12 itself in the stent member 1 can be formed as a "wall" of the housing for keeping the joint of the guide wire bent. If by default the end of the first segment away from the hole 13 or the third segment is a free end, and the side where the first segment is located is the front of the neck 12, then after the guide wire is bent through the hole 13 to form a junction, it can be The fixing cap 4 is welded to the neck 12 so that the fixing cap 4 covers the first section of the joint and the front face of said neck 12 where the first section is located.

The above design can simplify the assembly process of the device. For example, during assembly, the fixation cap 4 can be welded directly to the neck 12 of the stent member 1 after the guide wire is bent through the hole 13 to form a junction with the neck 12 of the stent member 1, without the need for the guide wire to pass through the sheath in advance. After the sleeve 3 is bent through the hole 13 of the neck 12, the sleeve 3 is moved to the whole body formed by the joining part and the neck 12 for fixing, thereby saving assembly time.

In addition, in the structure shown in FIG. 3 , the neck 12 does not include the opening groove 14 as described in the first embodiment, which can simplify the processing of the neck 12 . However, the neck 12 can also be designed to include an open groove 14 as described in the first embodiment, in order to have a favorable effect on the fatigue performance of this area.

Embodiment Three

FIG. 4 shows a schematic diagram of jointing of the joint part of the guide wire and the neck 12 of the stent component 1 in the intravascular interventional device of the third embodiment.

Different from the first embodiment, there is no hole 13 in the neck portion 12 of the support member 1 in the third embodiment. In this embodiment, the proximal end and the distal end of the neck 12 of the stent member 1 respectively have notches formed by indenting toward the central area of the neck 12 .

The distal end of the guide wire may be bent to pass through the notch at the distal end of neck 12 and further extend to the notch at the proximal end of neck 12 to form a junction. Further, the first and second segments in the joint may meet or wrap at a notch in the proximal end of the neck 12, as shown in FIG. 4 . Alternatively, the free end of the first segment in the joint may be further passed completely through the notch at the proximal end of the neck 12 and folded further to extend on the back of the neck 12 . In this case, the joint may also comprise a fourth segment and a fifth segment. Wherein, the fourth subsection connects the first subsection and the fifth subsection, and extends through the notch at the proximal end of the neck 12; The back of the neck 12 extends in the distal direction from a notch at the proximal end of the neck.

Wherein, the function of the notch at the distal end of the neck 12 is to ensure the engagement between the guide wire and the stent during the pulling back of the guide wire. The purpose of the notch at the proximal end of the neck 12 is to ensure engagement between the guide wire and the stent member 1 during guide wire advancement. In addition, the design of the two notches actually reduces the effective length of the neck 12, which can minimize the overall size of the joint formed by the neck 12 and the junction, thereby reducing the overall size of the whole endovascular intervention device after joining. size ratio.

As shown in Fig. 4, the two notches located at the proximal end and the distal end of the neck 12 respectively can be V-shaped notches or parabolic notches, and the bottom of the notches is preferably arc-shaped to reduce contact with Wear on the guidewire as it engages. However, it should be understood that these two notches can also be designed as other shapes such as square notches or semicircular notches.

In addition, preferably, the sleeve 3 or the fixing cap 4 can be crimped on the outer side of the whole formed after the joint part and the neck 12 are joined, so as to reliably maintain the joint between the joint part and the neck 12 .

Embodiment Four

Fig. 5 shows another embodiment of a neck 12 in an endovascular intervention device.

In the fourth embodiment, the neck 12 of the bracket member 1 includes a hole 13 . An open groove 14 is also arranged in the neck 12, and the open groove 14 extends from the proximal end of the hole 13 to the proximal end of the neck 12, and the open groove 14 opens at the proximal end of the neck 12. , Open slot 14 and hole 13 are integrated. The hole 13 is sized and shaped to allow the distal end of the guidewire to extend therethrough.

The hole 13 can be arranged at the proximal part, the middle position or the position close to the distal end of the neck 12 according to actual needs or different situations.

Although the hole 13 is a circular hole in the structure shown in FIG. 5 , it should be noted that the shape of the hole 13 can also be designed as an ellipse, an approximate circle or other suitable curved shapes according to actual needs.

In addition, in this embodiment, the width of the opening groove 14 needs to be smaller than the diameter of the third section in the joint portion of the guide wire, so as to prevent the third section from moving proximally along the opening groove 14 and separating from the neck 12 .

The assembly process of the stent component 1 and the guide wire in the fourth embodiment is similar to that of the first embodiment, and the distal end of the guide wire is passed through the hole 13 in FIG. 5 , and then the distal end of the guide wire is folded to form a junction , and add a sleeve 3 or a fixed cap 4 to the whole formed by joining the joint part and the neck 12 and carry out crimping and welding.

Embodiment five

Fig. 6 shows another embodiment of a neck in an endovascular intervention device. Compared with embodiment 1, this embodiment adjusts the proximal end of the neck.

In a fifth embodiment, the neck of the stent member includes a hole at a distal portion of the neck. The hole is sized and shaped to allow the distal end of the elongate manipulating member 2 (ie guide wire) to extend therethrough. That is, the diameter of the hole allows the passage of a guide wire. In addition, an open slot is provided in the neck extending from the distal end of the bore to the distal end of the neck. The open slot is integrated with the nearest grid unit of the support member 1 .

The open slots can be arranged similarly to the first embodiment, or as shown in FIG. 6 , the open slots can be directly outward from the distal end of the hole at a certain angle.

In this embodiment, as shown in FIG. 6 , the proximal end of the neck includes a proximal end portion 21 and a connecting portion 22 . The proximal end 21 is arranged substantially along the longitudinal axis of the stent member, and the connecting portion 22 is arranged to connect the proximal end 21 with the neck portion where the hole is provided. The connecting portion 22 is offset to one side with respect to the longitudinal axis of the stent, and has a smaller transverse width (less than the transverse width of the proximal end, or less than the overall transverse width of the neck) to allow sufficient space. The transverse width dimension of the proximal end portion 21 is larger than that of the connecting portion 22 to prevent the sleeve from sliding proximally after it is secured in place on the connecting portion 22 .

Preferably, the underside surface of the connecting portion 22 in FIG. 6 is substantially flush with the underside of the neck and the underside of the proximal end 21 , and is preferably formed to be smoothly integrally connected.

Preferably, the upper surface of the connecting portion 22 in FIG. 6 is tangent to or lower than the lower part of the hole, so as to better accommodate the overlapped part of the folded guide wire.

In other words, compared with the neck structure of Embodiment 1, Embodiment 5 can be considered as processing a groove on one side in the middle section of the proximal end of the neck of Embodiment 1, so as to leave enough space for accommodating the guide wire. relevant part of .

Fig. 7 shows a schematic diagram of the assembly of the fifth embodiment. The distal end of the guide wire is threaded through the hole, and then the distal end of the guide wire is folded over to form a junction at the junction 22, where it is threaded entirely over the metal sleeve and crimped. This will maintain a secure connection of the guide wire to the stent member. If desired (although not essential), a spot weld can be applied at this location to ensure a secure connection between the guide wire and the stent member.

As shown in FIG. 7 , such an assembly process is easier, and the entire connection formed is obviously more compact, and it is not easy to form kinks or bends at the assembly point.

Although in the structure shown in FIG. 6 , the hole is a circular hole, it should be noted that the shape of the hole can also be designed as an ellipse, an approximate circle or other suitable curved shapes according to actual needs. The connection portion 22 and the proximal end portion 21 may also be of other suitable shapes.

In addition, in this embodiment, the width of the proximal end of the open slot needs to be smaller than the diameter of the third section in the joint portion of the guide wire, so as to prevent the third section from moving outward along the open slot and separating from the neck.

Figure 7 also shows that part of the guide wire 20 may extend out of the sleeve, a similar location may be covered with a suitable flexible adhesive to ensure that there are no sharp edges. Also available for other embodiments to do similar processing.

The embodiments of the present invention are not limited to the above-mentioned embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can make various changes and improvements to the present invention in form and details, and these All are considered to fall into the protection scope of the present invention.

Claims

An intravascular interventional device, characterized in that it comprises:

The bracket member includes a bracket body and a neck positioned at the proximal side of the bracket body, the bracket body converges on the neck; the neck has opposite fronts and backs; holes on the back;

an elongated manipulating member having a distal end comprising a joint engaging the neck of the stent member; the joint comprising a first segment, a second segment, and a joint connecting the first segment and the second segment a third segment of the segment; the third segment extends through the hole, the first segment and the second segment proximately from the hole on the front and back of the neck, respectively extending in a direction so as to engage the neck.
The intravascular interventional device according to claim 1, characterized in that an open slot is further provided in the neck, and the open slot extends from the distal end of the hole to the distal end of the neck, And the hole, the opening groove and the nearest grid of the bracket main body are integrated.
The intravascular interventional device according to claim 1, characterized in that an open slot is further provided in the neck, and the open slot extends from the proximal end of the hole to the proximal end of the neck, And the hole and the opening slot are integrated.
The intravascular interventional device according to claim 1 or 2, wherein the proximal end of the neck comprises a proximal end and a connecting portion, and the connecting portion connects the proximal end to the hole where the hole is provided. In the neck portion, the lateral width of the connecting portion is relatively small.
The intravascular intervention device according to claim 4, wherein the proximal end portion is substantially arranged along the longitudinal axis of the stent member, and the connection portion is arranged offset to one side relative to the longitudinal axis of the stent member.
The intravascular interventional device according to claim 5, wherein the lower side surface of the connection part is substantially flush with the lower side of the neck and the lower side of the proximal end.
The intravascular interventional device according to claim 5 or 6, wherein the upper surface of the connecting part is tangent to or lower than the lower part of the hole.
The intravascular interventional device according to any one of claims 4-7, characterized in that, The second segment and the third segment coincide at an upper portion of an upper side surface of the connecting portion.
The intravascular intervention device according to any one of claims 1-8, characterized in that, the width of the opening groove is smaller than the diameter of the third segment of the joint part.
An intravascular interventional device, characterized in that it comprises:

The stent member includes a stent body and a neck positioned at the proximal side of the stent body, the stent body converges at the neck; the proximal end and the distal end of the neck are respectively formed with a central depression toward the neck the notch;

an elongated manipulating member having a distal end comprising a joint engaging the neck of the stent member; the joint comprising a first segment, a second segment, and a joint connecting the first segment and the second segment a third segment of the segment; the third segment extends through the notch at the distal end of the neck, the first segment and the second segment are respectively on the front side of the neck and the back extend in a proximal direction from a notch at the distal end of the neck to engage the neck.
The intravascular intervention device according to claim 10, characterized in that at a notch at the proximal end of the neck, the first segment and the second segment converge or intertwine.
The intravascular interventional device according to claim 10, wherein the joint portion of the elongated manipulation member further comprises a fourth segment and a fifth segment; the fourth segment connects the first segment and a fifth segment extending through the notch at the proximal end of the neck; the fifth segment at the back of the neck from the notch at the proximal end of the neck to Extends in the distal direction.
The intravascular interventional device according to claim 10, wherein the notch is V-shaped, parabolic, square or semicircular.
The intravascular interventional device according to any one of claims 1-13, further comprising a sleeve circumferentially surrounding the entire periphery formed by engagement of the neck portion and the engagement portion.
The intravascular interventional device according to claim 14, wherein the sleeve is welded to the neck and the joint.
The intravascular interventional device according to any one of claims 1-13, characterized in that, It also includes a fixed cap, the fixed cap covers the first section of the joint and the front of the neck where the first section is located; wherein the first section is far away from the first section One end of the three segments is a free end, and the end of the second segment away from the third segment is connected to the main body portion of the elongated manipulation member.
The intravascular interventional device according to claim 16, wherein the fixing cap is welded to the neck and the joint.