WO2022143895A1

WO2022143895A1 - Intracavitary plugging device

Info

Publication number: WO2022143895A1
Application number: PCT/CN2021/143068
Authority: WO
Inventors: 李安伟; 王永胜
Original assignee: 杭州唯强医疗科技有限公司
Priority date: 2020-12-30
Filing date: 2021-12-30
Publication date: 2022-07-07

Abstract

An intracavitary plugging device, comprising a plugging body and a developing mark. The plugging body is of a hollow tubular structure and may be contracted or expanded in a radial direction. The plugging body has a net shape formed from a plurality of connecting rods connected to each other, the plurality of connecting rods comprise a first connecting rod and a second connecting rod which are connected to each other, and the first connecting rod and the second connecting rod are connected at a connecting node at an angle. The developing mark is formed by winding, around the connecting rods, a filament material having developing performance; and the developing mark has at least one fixed end and at least one extending end, wherein the fixed end is located at a connecting node of the plugging body, and is connected to both the first connecting rod and the second connecting rod that are located at the connecting node, and the extending end is located on a connecting rod and away from the fixed end.

Description

Intracavity blocking device

technical field

The invention relates to the technical field of medical devices, in particular to an intracavity blocking device.

Background technique

Interventional therapy is an emerging treatment method between surgery and medical treatment, including endovascular interventional and non-vascular interventional therapy. To put it simply, interventional therapy is to make tiny channels with a diameter of several millimeters in blood vessels and skin without surgery to expose the lesions, or through the original pipeline of the human body, guided by imaging equipment (angiography machine, fluoroscopy machine, etc.) The most minimally invasive treatment method for local treatment of the lesion. Interventional therapy has the advantages of less trauma, simplicity, safety, effectiveness, fewer complications and significantly shorter hospital stay.

As an implant for interventional therapy, the occlusion device can be used to close defect openings, or tissue breaches, lumen, and organ passages in humans and/or animals.

When the device for interventional therapy enters the human body through the delivery catheter by means of percutaneous puncture, its position can only be observed under radiation conditions. At this time, the visualization is very important for the device that requires the direction of use. The material development of the device itself is not enough to clearly identify the direction, and it is necessary to fix a suitable and reasonably positioned developing point to identify the direction.

However, the current fixing method of the developing point causes the developing point to move, resulting in inaccuracy of the identification direction.

technical problem

The purpose of the present invention is to provide an intracavity blocking device to solve the problem of inaccurate identification direction in the prior art.

technical solutions

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a cavity blocking device, comprising:

The blocking body is a hollow tubular structure and can be contracted or expanded in the radial direction; the blocking body is interconnected by a plurality of connecting rods to form a net shape, and the plurality of connecting rods include a first connecting rod that is connected to each other. and a second connecting rod, the first connecting rod and the second connecting rod are connected to the connecting node at an angle;

A developing mark, which is formed by winding a filamentary material with developing performance around the connecting rod; the developing mark has at least one fixed end and at least one extending end, and the fixed end is located at a connection of the blocking body The extension end is located on the connecting rod and is far away from the fixed end.

beneficial effect

The intracavity blocking device of the embodiment of the present invention has at least the following advantages and positive effects:

The intracavity blocking device fixes the developing mark at the intersection of the blocking body and connects with the first metal wire and the second metal wire at the intersection at the same time, so that the position of the developing mark on the blocking body is relatively stable If it does not move, the inaccurate position of the developing mark caused by the movement of the developing mark is avoided, thereby improving the accuracy of the cavity blocking device in distinguishing the directionality.

Description of drawings

FIG. 1 is a schematic structural diagram of the first embodiment of the cavity blocking device of the present invention.

FIG. 2 is a first directional view of the intraluminal occlusion device of FIG. 1 .

FIG. 3 is a second directional view of the intraluminal occlusion device of FIG. 1 .

FIG. 3 a is a top view of the intraluminal occlusion device of FIG. 1 .

Figure 3b is a top view of a variation of the intraluminal occlusion device shown in Figure 3a.

FIG. 4 is a partial structural schematic diagram of the first embodiment of the intracavity blocking device.

FIG. 5 is a partial structural schematic diagram of the first embodiment of the intracavity blocking device.

FIG. 6 is a partial structural schematic diagram of the first embodiment of the intracavity blocking device.

FIG. 7 is a partial structural schematic diagram of the first embodiment of the intracavity blocking device.

FIG. 8 is a partial structural schematic diagram of the second embodiment of the intracavity blocking device.

FIG. 9 is a partial structural schematic diagram of the third embodiment of the intracavity blocking device.

FIG. 10 is a schematic structural diagram of the fourth embodiment of the cavity blocking device of the present invention.

FIG. 11 is a first directional view of the intraluminal occlusion device of FIG. 10 .

FIG. 12 is a second directional view of the intraluminal occlusion device of FIG. 10 .

Fig. 13 is a partial structural schematic diagram of the fourth embodiment of the intracavity blocking device.

FIG. 14 is a schematic structural diagram of the fifth embodiment of the intracavity blocking device of the present invention.

FIG. 15 is a first directional view of the intraluminal occlusion device of FIG. 14 .

FIG. 16 is a second directional view of the intraluminal occlusion device of FIG. 14 .

Fig. 17 is a partial structural schematic diagram of the fifth embodiment of the intracavity blocking device.

FIG. 18 is a schematic structural diagram of the sixth embodiment of the cavity blocking device of the present invention.

FIG. 19 is a first directional view of the intraluminal occlusion device of FIG. 18 .

FIG. 20 is a second directional view of the intraluminal occlusion device of FIG. 18 .

FIG. 21 is a schematic structural diagram of the seventh embodiment of the cavity blocking device of the present invention.

FIG. 22 is a schematic diagram of the deformation structure of the seventh embodiment of the cavity blocking device of the present invention.

Embodiments of the present invention

Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially used for illustration rather than limitation this invention.

When describing the orientation in the present invention, the operator of the endoluminal occlusion device is used as a reference, the end close to the operator is the proximal end, and the opposite end is the distal end.

The invention provides an intracavity blocking device, comprising a blocking body and a developing mark. The blocking body is a hollow tubular structure and can be contracted or expanded in the radial direction. The blocking body is interconnected by a plurality of connecting rods to form a mesh, the plurality of connecting rods include a first connecting rod and a second connecting rod that are connected to each other, and the first connecting rod and the second connecting rod are angled connected to the connection node. The developing mark is formed by winding a filamentary material with developing performance around the connecting rod; the developing mark has at least one fixed end and at least one extending end, and the fixed end is located at a connecting node of the blocking body and is connected to both the first connecting rod and the second connecting rod located at the connecting node, and the extending end is located on the connecting rod and is away from the fixed end.

The intraluminal occlusion device provided by the present invention can be used for minimally invasive interventional therapy. The developing mark of the cavity blocking device has good fixity, is not easy to slide, and improves the accuracy of identifying the direction.

Specifically, the blocking body can be cut from a pipe body, or can be interlaced with metal wires. When the blocking body is woven from wire. The following will take a plug body made of interlaced metal wires as an example for detailed description. It can be understood that the following embodiments are also applicable to the blocking body cut from the pipe body.

The first embodiment of the cavity blocking device

Please refer to the structure shown in FIGS. 1-7 , the cavity blocking device 1 includes a blocking body 11 and a developing mark.

The blocking body 11 is a hollow tubular structure inside, and can be contracted or expanded in the radial direction. Specifically, the blocking body 11 is interlaced with metal wires to form a mesh.

The overall structural shape of the blocking body 11 in this embodiment may be substantially the same as the shape of the existing blocking body 11 . Wherein, the blocking body 11 in this embodiment is woven with metal wires to form a mesh, that is, the above-mentioned connecting rods are in the form of metal wires. For convenience of description, the metal wire is divided into a first metal wire 111 and a second metal wire 112, and the first metal wire 111 and the second metal wire 112 are the above-mentioned first connecting rod and second connecting rod. And the point where the first metal wire 111 and the second metal wire 112 cross each other is the intersection point 113 (ie, the connection node). However, it should be emphasized that in this embodiment, the blocking body 11 may be woven with multiple metal wires, and the metal wires at the intersections may belong to the same metal wire or may belong to different metal wires. It can be understood that, in this embodiment, the metal wire at the intersection 113 is divided into the first metal wire 111 and the second metal wire 112 , which is mainly divided by the formation of the intersection 113 , and does not represent the difference between the two metal wires. actual attribution.

The blocking body 11 is in a non-rotationally symmetrical shape in the circumferential direction. This can be formed by, for example, the asymmetry of the weaving density, the asymmetry of the weave cross-sectional shape, or the asymmetry of the weave surface shape, etc., during the process of weaving the metal wire to form the plugging body 11 . The asymmetry of the weaving density, that is, the density of the mesh holes in the circumferential direction is not uniformly distributed, causes the sealing body 11 to be asymmetrical in the circumferential direction. The shape of the braided cross-section is asymmetrical, that is, the cross-section of the network pipe is not circular, so the blocking body 11 is asymmetrical in the circumferential direction. The asymmetry of the woven surface shape, that is, the side surface of the network tube is formed into various shapes such as plane, arc or wave shape by heat setting, and the shape is asymmetric in the circumferential direction, resulting in the sealing body 11 being asymmetric in the circumferential direction. Regardless of the cause of the asymmetry of the blocking body 11 , the blocking body 11 will have directionality.

The non-rotational symmetry of the sealing body 11 can be structurally including at least two arc surfaces with different curvature radii in the circumferential direction (refer to FIG. 3 a ); 3b).

Specifically, in this embodiment, referring to FIGS. 1 and 3 a , the blocking body 11 includes a first arc surface 116 and a second arc surface 117 along the circumferential direction. The first arc surface 116 and the second arc surface 117 are connected to form a non-rotationally symmetrical structure, so that the blocking body 11 has directionality in the circumferential direction. Taking L1 in FIG. 1 as the dividing line, one side is the first arc surface 116 and the other side is the second arc surface 117 . The radius of curvature of the first arc surface 116 is greater than the radius of curvature of the second arc surface 117 .

The blocking body in this embodiment has a symmetrical structure with respect to the boundary line L2.

In other embodiments, the blocking body 11 may further include three arc surfaces, four arc surfaces or other numbers of arc surfaces along the circumferential direction, wherein the multiple arc surfaces have at least two radii of curvature.

In this embodiment, the circumference of the first arc surface 116 is smaller than the circumference of the second arc surface 117 .

In this embodiment, the long axis of the plugging body 11 is defined as the longest distance between two points on the periphery of the plugging body 11 on the section with the largest dimension that is perpendicular to the axial direction; the short axis is the vertical axis of the long axis The distance between the two points where the line meets the perimeter.

In this embodiment, both ends of the long axis of the blocking body 11 are located on the first arc surface 116 . Specifically, the long axis corresponds to the length of the connecting line between the two circumferential ends of the first arc surface, that is, L1 and the peripheral edge The intersection of , that is, the connection between point A and point B. The short axis is the intersection of the vertical line of the long axis and the periphery, that is, the intersection of L2 and the periphery, that is, the line between points C and D. In this embodiment, point C is the circumferential midpoint of the first arc surface 116 , and point D is the circumferential midpoint of the second arc surface 117 .

Due to the asymmetry of the blocking body 11 and the structure of the first arc surface 116 and the second arc surface 117 , the blocking body 11 has directionality in the circumferential direction, so that the cavity blocking device 1 is released when it is released. The release must be carried out in a certain direction, for example, the first arc surface 116 must be directed to the left. The developing mark is fixed on the above-mentioned blocking body 11 to facilitate the operator to judge whether the shape of the intracavitary blocking device 1 in the human body is correct and whether the intracavitary blocking device 1 is accurately placed at the target position under radiation conditions.

The visualization mark can be set at the proximal end of the blocking body 11 , or at the proximal end and the distal end at the same time, and can be set according to actual conditions. Wherein, in this embodiment, the development mark is set at the proximal end of the blocking body 11 as an example for description.

Continuing to refer to FIG. 1 , the number of developing marks is three, namely two end developing marks 121 and one middle developing mark 122 , which are arranged on the sealing body 11 in the circumferential direction and have a key that can identify the circumferential direction of the sealing body 11 . position to distinguish the direction of the intraluminal occlusion device 1 .

In other embodiments, the number of developing marks may also be two, four or other numbers. Specifically, 2 to 6 developing marks are set on the intra-cavity blocking device 1, and the specific number is set according to the actual situation. The development marks 121 at both ends are located at or near the interface between the outer peripheral surface and the proximal end surface of the blocking body 11 , and the development marks 121 at both ends are arranged at intervals in the circumferential direction. Specifically, the development marks 121 at both ends are located on the first arc surface 116 , and are divided into two ends adjacent to the long axis of the blocking body 11 . Therefore, the long axis of the intraluminal occlusion device 1 is marked with the development marks 121 at both ends.

The middle developing mark 122 is located in the axial middle part of the sealing body 11 and in the circumferential middle part of the first arc surface 116 . In this application, the axial middle portion of the blocking body 11 does not specifically refer to the central position of the blocking body 11 in the axial direction, but refers to a certain length range including the axial central position of the blocking body 11 , excluding the ends of the axial ends of the blocking body 11 . The central portion of the first arc surface 116 in the circumferential direction does not specifically refer to the exact center position of the first arc surface 116 in the axial direction, but refers to a certain length range including the exact center position of the first arc surface 116 in the circumferential direction. , excluding the ends of both ends of the first arc surface 116 in the circumferential direction.

Specifically, in this embodiment, the central developing mark 122 is located at the exact center position in the axial direction of the blocking body 11 , and is also located at the center position in the circumferential direction of the first arc surface 116 .

In this embodiment, the developing marks 121 at both ends are located on the first arc surface 116 and mark the long axis of the blocking body 11 . Therefore, through the developing marks 121 on both ends, it can be identified that the blocking body 11 is located on the human body 11 . When inside the body, the direction of the first arc surface 116 , that is, the directionality of the circumferential direction of the blocking body 11 can be identified. Therefore, after the endoluminal occlusion device 1 enters the target blood vessel under radiation conditions, the three imaging markers mentioned above can be seen through the sheath to be received in the sheath. The relative positions of the development marks 121 at both ends determine the release direction of the intracavity blocking device 1 . With the release of the intraluminal occlusion device 1 , the central developing mark 122 can be seen. Combined with the relative positions of the three development marks, it is determined whether the releasing intraluminal occlusion device 1 has wrong release patterns such as concave and twisted.

Referring to Figure 3b, in a variant of the blocking body 11, the blocking body 11 comprises two identical segments 116, 117 which are connected to each other. Preferably, a smooth transition is formed at the connection of the two arc surfaces 116 and 117 . The central angles corresponding to the two arc surfaces 116 and 117 are both smaller than 180 degrees. Therefore, the curvature center line O1 of the arc surface 116 and the curvature center line O2 of the arc surface 117 do not overlap. The plugging body 11 of this structure also has a certain directionality in the circumferential direction. Therefore, the above-mentioned end developing marks are respectively arranged on both ends of one arc surface, and a middle developing mark can also be arranged at the circumferential center of the other arc surface, which can advantageously identify the orientation of the blocking body 11 .

It can be understood that the arrangement of the developing marks in this embodiment is particularly advantageous for the sealing body 11 that is asymmetric in the circumferential direction, but in other embodiments, the sealing body 11 that is symmetrical in the circumferential direction, such as a circular sealing body 11 Developable markers of various embodiments of the present invention may also be used. At this time, the development marks on the blocking body 11 can be arbitrarily set. Specifically, two end developing marks 121 may be provided at or near the junction of the outer peripheral surface and the end surface of the blocking body 11 at intervals, and the two end developing marks 121 are arranged at both ends of the diameter of the circle.

Referring to FIG. 4 , the developing mark is formed by winding a filamentary material with developing performance around a metal wire. And the development mark is wrapped around the intersection 113 and is connected with the first metal wire 111 and the second metal wire 112 at the intersection 113, so that the position of the development mark on the metal wire on the blocking body 11 is not easily moved, thereby making it difficult to move. The position of the developing mark is stable, so that the blocking device has a high accuracy of identifying the direction when it is in use.

In this embodiment, the structures of the developing marks 121 at both ends and the developing marks 122 at the middle are the same. The structure of the developed mark 121 at one end will be described as an example.

Specifically, the end developing mark 121 has a fixed end 1211 and an extended end 1212 .

When the end developing mark 121 is wound around the wire, it is located at the intersection 113 and is connected with both the first wire 111 and the second wire 112 at the intersection 113 , thereby forming the fixed end 1211 . The end developing mark 121 is wound on the metal wire and the other end opposite to the fixed end 1211 is the extension end 1212 . For example, the middle part of the wire material is wound around the intersection point 113 , and two sections from the middle part to the end part are wound around the wire, and the end point is the extension end 1212 .

The end developing mark 121 is simultaneously connected to the first metal wire 111 and the second metal wire 112 at the intersection 113 by means of a cross winding.

In this embodiment, the number of the extension ends 1212 is one, and they are located on one of the metal wires and are far away from the corresponding fixed end 1211 , so that the end developing marks 121 are linear. For example, the extension end 1212 may be located on the first wire 111 or on the second wire 112 .

The distance from the extension end 1212 to the fixed end 1211 is 1-50 mm. That is, the length of the end developing mark 121 covering the wire is 1 to 50 mm. The specific length can be set according to the actual situation.

Further, referring to FIG. 5 , the extension end 1212 is provided with a clamping sleeve 1213 . The clamping sleeve 1213 has a cylindrical shape as a whole, and is sleeved on the outer periphery of the end developing mark 121 and the corresponding metal wire to clamp the extension end 1212 on the metal wire, thereby preventing the end developing mark 121 from sliding on the metal wire. . The clamping sleeve 1213 is also disposed on the outer periphery of the developing mark, and sleeves the sharp end surface that may exist at the end of the extension end 1212 to avoid injury to the human body when the cavity blocking device 1 enters the human body.

In some embodiments, referring to FIG. 6 , the outer periphery of the end developing mark 121 is covered with a heat shrinkable film 1214 . The heat shrinkable film 1214 not only stabilizes the developing mark on the wire, but also protects the end of the extension end 1212 There may be sharp end faces, so as to avoid injury to the human body when the intracavity blocking device 1 enters the human body.

In other embodiments, referring to FIG. 7 , the metal wire and the end developing mark 121 are fixed by a polymer suture 1215, which further ensures the stability of the end developing mark 121 without sliding. Specifically, one end of the polymer suture 1215 is intertwined with the end developing mark 121 , and the other end extends to the intersection 113 while being intertwined with the first metal wire 111 and the second metal wire 112 and knotted for fixation.

Wherein, the material of the end developing mark 121 is tantalum wire, platinum wire, gold wire or other radiopaque materials and alloy materials thereof.

The extension direction of the developing marks 121 at both ends on the blocking body 11 is inclined relative to the axial direction of the blocking body 11 , and the inclination direction can be in the same direction or in different directions, which can be set according to the actual situation.

The developing mark in this embodiment is fixed at the intersection 113 of the blocking body 11 , so that the position of the developing mark on the blocking body 11 is relatively stable, and the movement of the developing mark causes the inaccurate position of the developing mark to be avoided. phenomenon, thereby improving the accuracy of the intracavity occlusion device 1 in distinguishing the directionality.

The second embodiment of the cavity blocking device

Referring to the structure shown in FIG. 8 , the cavity blocking device of this embodiment differs from the first embodiment in that the developing mark 22 includes a fixed end 2211 and two extending ends 2212 .

Specifically, the fixed end 2211 is also located at the intersection 213, and the two extending ends 2212 are extended in the same direction, so that the developing mark 22 is linear. That is, one of the extending ends 2212 is located on the first metal wire 211 , the other extending end 2212 is also located on the first metal wire 211 , and the two extending ends 2212 are arranged on both sides of the fixed end 2211 . In other embodiments, both the extending ends 2212 may be located on the second metal wire 212 .

Both the end developing marks and the middle developing marks adopt the above structures.

Other features of the cavity blocking device in this embodiment can be referred to in the first embodiment, and will not be described in detail.

The third embodiment of the cavity blocking device

Please refer to the structure shown in FIG. 9 , the developing mark 32 of the cavity blocking device in this embodiment also includes a fixed end 3211 and an extension end 3212 . The fixed end 3211 is still disposed at one of the intersections 313 . The difference between this embodiment and the first embodiment is that the extension end 3212 extends from the fixed end 3211 to another intersection 313 along the extension direction of one of the wires, and cross-winding is performed at the intersection 313, which is different from the first The wire 311 and the second wire 312 are connected at the same time. And the intersection 313 where the fixed end 3211 is located is adjacent to the intersection 313 where the extending end 3212 is located.

The fourth embodiment of the intracavity blocking device

Please refer to the structures shown in FIGS. 10-13. The difference between the cavity blocking device of this embodiment and the first embodiment is that the cavity blocking device 4 includes two end developing marks 421 and a middle developing mark 422, Wherein, both end developing marks 421 have two extending ends.

The structures of the development marks 421 at both ends are the same. Referring to FIG. 13 , each end developing mark 421 includes two extending ends, and the two extending ends are located on the first wire 411 and the second wire 412 respectively, so that the end developing mark 421 has a < shape, the < shape The structure has an opening.

In order to distinguish the two extending ends, the extending end on the first metal wire 411 is the first extending end 4212 , and the extending end on the second metal wire 412 is the second extending end 4213 . Wherein, in this embodiment, the distance from the first extension end 4212 to the fixed end 4211 is the same as the distance from the second extension end 4213 to the fixed end 4211 . In other embodiments, the distance from the first extension end 4212 to the fixed end 4211 and the distance from the second extension end 4213 to the fixed end 4211 may also be different, which may be set according to actual conditions.

The winding method of the end developing mark 421 in the present embodiment is as follows: the filamentary material is placed at the first extension end 4212 , and spirally and tightly wound along the first metal wire 411 until it is wound to a cross of the blocking body 41 . At point 413, the wire is cross wound at this intersection 413, so that the filamentary material is fixed at the intersection 413. Then, the direction is changed so that the filamentous material is helically densely wound on the second metal wire 412 along the direction of the second metal wire 412 , so as to form the end developing mark 421 . The processing methods of the first extension end 4212 and the second extension end 4213 may refer to the first embodiment.

In this embodiment, the developing marks 421 at both ends are arranged symmetrically with the center in the circumferential direction of the first arc surface, that is, with the center in the circumferential direction of the first arc surface as a reference, the developing marks 421 at both ends are arranged in the form of > and < On both sides of the center, ie, both end portions, the development marks are arranged so that the opening directions thereof are opposite. In other embodiments, the developing marks at both ends may also be oriented in different directions, for example, both are in the form of <, that is, the openings are oriented in the same direction; or the developing marks at both ends may also be arranged with their openings facing each other.

The fifth embodiment of the cavity blocking device

Please refer to the structures shown in FIGS. 14-17. The difference between the cavity blocking device of this embodiment and the first embodiment is that the cavity blocking device 5 includes two end developing marks 521 and a middle developing mark 522, Wherein, both end developing marks 521 have four extending ends.

The structures of the development marks 521 at both ends are the same. Referring to FIG. 17 , each end developing mark 521 includes four extending ends, which are a first extending end 5212 , a second extending end 5213 , a third extending end 5214 and a fourth extending end 5215 . in. The first extension end 5212 and the second extension end 5213 are located on the first wire 511 and are arranged on both sides of the fixed end 5211, and the second extension end 5213 and the fourth extension end 5215 are located on the second wire 512 and They are arranged on both sides of the fixed end 5211, so that the end developing marks 521 are X-shaped.

In this embodiment, the distances from each extension end to the fixed end 5211 are equal. In other embodiments, the distance from each extension end to the fixed end 5211 can also be set according to actual conditions.

The winding method of the end developing mark 521 in this embodiment is as follows: a wire-like material is placed at the first extension end 5212 , and spirally and tightly wound along the first metal wire 511 until it is wound to a cross of the blocking body 51 . At point 513, the wire is cross wound at this intersection 513, so that the filamentary material is fixed at the intersection 513. The direction is then changed so that the filamentary material is helically densely wound on the second wire 512 in the direction of the second wire 512 . Take another filamentous material and use the same winding method as above, and perform cross winding at the same intersection 513 to wind it into an X shape. The processing methods of the first extension end 5212 and the second extension end 5213 may refer to the first embodiment.

The structure of the middle developing mark 522 in this embodiment is the same as that of the middle developing mark 522 in the first embodiment. In other embodiments, the middle portion developing mark 522 may also adopt the structure of the end portion developing mark in the second embodiment, the third embodiment, the fourth embodiment and the present embodiment.

Sixth embodiment of intracavity blocking device

Please refer to the structures shown in FIGS. 18 to 20 . The difference between the cavity blocking device in this embodiment and the fifth embodiment is that the cavity blocking device 6 in this embodiment includes three end developing marks and one The middle develops the mark 622.

Wherein, the end developing marks and the middle developing marks 622 located at both ends of the long axis are set in the same manner as in the fifth embodiment, and will not be repeated here.

The two end developing marks located at or near the long axis are defined as the first end developing marks 621 , and the other end developing marks are defined as the second end developing marks 623 .

The second end developing mark 623 is disposed at the junction of the outer circumference of the blocking body 61 and the proximal end surface or at a position near it, and is specifically located in the middle part of the second arc surface in the circumferential direction. In this embodiment, the second end developing mark 623 is located at the center of the second arc surface in the circumferential direction. Therefore, the midpoint of the connecting line of the two first end developing marks 621 and the connecting line of the second end developing marking 623 can roughly mark the short axis direction of the blocking body 61 .

The second end developing mark 623 may be linear, and has the same structure as the middle developing mark 622 , and reference may be made to the description of the middle developing mark 622 .

Therefore, after the endoluminal occlusion device 6 enters the target blood vessel, under radiation conditions, the above-mentioned four imaging markers can be seen through the sheath and are received in the sheath. The relative positions of the three end development marks determine the release direction of the intracavity blocking device 6 . With the release of the intraluminal occlusion device 6 , the middle developing mark 622 can be observed, and combined with the relative positions of the four development marks, it is determined whether the releasing intraluminal occlusion device 6 has wrong release patterns such as concave and twisted.

For other features of the cavity blocking device in this embodiment, reference may be made to the fifth embodiment, which will not be described in detail.

Seventh embodiment of intracavity blocking device

Please refer to the structures shown in FIG. 21 and FIG. 22 , the difference between the cavity blocking device of this embodiment and the first embodiment is that the cavity blocking device in this embodiment further includes a recovery structure 72 . By setting the recovery structure 72, the method of directly puncturing the human epidermis by open surgery for recovery is replaced, which is convenient, fast, safe and reliable, and causes less damage to the patient. A plug head 711 protrudes from the proximal end of the blocking body 71 . The plug head 711 in this embodiment is formed by a closed head that blocks the end of the main body 71 . A connecting hole 7111 with an internal thread is provided in the middle of the bolt head 711 .

The recovery structure 72 includes a cable 721 and a recovery head 722 provided at the head end of the cable 721. The recovery head 722 and the bolt head 711 are detachably connected, and the blocking body 71 is pulled to move axially by the movement of the cable 721 along the proximal end. The recovery of the blocking body 71 is realized.

In this embodiment, the recovery head 722 and the bolt head 711 are connected by screw threads, which is convenient and reliable.

When the occlusion device needs to be used, the occlusion body 71 is retracted into a delivery sheath (not shown). The blocking body 71 is threadedly connected to a delivery wire cable (not shown) through a bolt head 711 , and the delivery wire cable together with the blocking body 71 is arranged in the delivery sheath. When the delivery sheath is delivered to the expected release position in the body, the delivery wire moves axially to push the blocking body 71 out of the sheath, and rotates the delivery wire to disengage the plug head 711 to complete the release of the blocking body 71 . The above-mentioned threaded connection structure is reliable and the release is controllable, but if it is found that the release position is wrong or other problems are found after the threaded connection is released, it is difficult to re-screw the conveying steel cable with the bolt head 711 again. When the cable head is screwed with the bolt head 711, once there is an angle deviation, the cable head will be ejected from the connection hole 7111, and recovery is difficult.

In this regard, in order to solve the above problem, in this embodiment, a positioning portion 73 for assisting recovery of the blocking body 71 is added to the plug head 711 . Due to the arrangement of the positioning portion 73 , the recovery head 722 can obtain an axial limit, which not only prevents it from popping open during connection, but also facilitates centering and improves the success rate of the recovery operation.

Specifically, the positioning portion 73 protrudes in the axial direction, and is arranged in a ring shape around the connecting hole 7111 . The positioning portion 73 is coaxial with the connecting hole 7111 , and the inner diameter of the positioning portion 73 is larger than the inner diameter of the connecting hole 7111 .

The recovery head 722 includes a recovery head body 7221 and a protrusion 7223 axially protruding from one end of the body. The circumferential size of the recovery head 722 is adapted to the inner diameter of the positioning portion 73, and the outer diameter of the protrusion 7223 is adapted to the inner diameter of the connecting hole 7111. The outer peripheral wall of the protrusion 7223 is also provided with the connecting hole 7111. Suitable external thread.

As shown in the figure, the positioning portion 73 is integrally formed on the end of the bolt head 711 , and the outer wall of the positioning portion 73 is flush with the outer wall of the main body of the bolt head 711 . The overall structure has high strength and is not easy to be damaged.

In other embodiments, the positioning portion 73 and the plug head 711 can also be connected to each other after being formed separately. The positioning portion 73 is a hollow cylindrical structure made of polymer material, which has good hardness and light weight. The positioning portion 73 is sleeved and fixed on the outer circumference of the plug head 711 by sewing or heat fusion. One end of the positioning portion 73 away from the blocking body 71 is opened for the recovery head 722 to enter.

In the process of screw connection, firstly align the recovery head 722 into the interior of the positioning portion 73; as the cable 721 is pushed forward in the axial direction, the recovery head body 7221 is limited by the positioning portion 73 and positioned along the positioning portion 73. axial movement of the portion 73 . Since the positioning portion 73 and the connection hole 7111 are coaxial, the protrusion 7223 at the head end of the recovery head body 7221 is easy to be centered with the connection hole 7111; after the protrusion 7223 is inserted into the connection hole 7111, the cable 721 is rotated to make the recovery head 722 as a whole. Rotate together, and screw the protrusion 7223 into the connecting hole 7111 along the thread direction until it is completely screwed and fixed with the connecting hole 7111 . At this time, the recovery head 722 and the plug head 711 are connected and fixed. Under the action of external force, the cable 721 is pulled back toward the direction of the operator, thereby driving the retraction head 722 and the blocking body 71 to retract into the delivery sheath; then the delivery sheath is withdrawn from the human body, and finally The recovery of the plug body 71 is completed.

Preferably, the protrusions 7223 are made of magnetic material. In this way, when the plug head 711 is made of ferromagnetic metal, after the recovery structure 72 enters the human body with the delivery sheath, the protrusion 7223 is guided to the plug head 711 under the action of the magnetic field, so that the protrusion 7223 The connection hole 7111 of the bolt head 711 is easy to be centered, and the precision and efficiency of the screw connection are improved.

In other embodiments, the connection between the recovery head 722 and the plug head 711 may also be a snap connection. Specifically, the snap connection can be as follows: the end of the snap connection plug 711 is provided with a protruding snap protrusion in the circumferential direction. The end of the recovery head 722 is provided with a hook, and the hook is engaged with the hook, so that the recovery head 722 and the bolt head 711 can be engaged with each other. The above-mentioned snap connection can replace the threaded connection, and the disassembly and assembly are more convenient, the structure of each component is simple, and the cost is low. The intracavity blocking device in this embodiment realizes the recovery of the blocking body 71 by setting the recovery structure 72, thereby replacing the method of directly puncturing the human epidermis by open surgery for recovery, which is convenient, fast, safe and reliable, and reduces the damage to the patient. smaller. In addition, the recovery head 722 and the bolt head 711 in the recovery structure 72 are detachably connected, and can be separated and reconnected according to usage conditions, which is convenient and reliable, and improves operability.

It should be noted that the specific technical solutions in the above embodiments may be mutually applicable.

As can be seen from the above technical solutions, the embodiments of the present invention at least have the following advantages and positive effects:

In the cavity blocking device of the present invention, the developing mark is fixed at the intersection of the blocking body and connected with the first metal wire and the second metal wire at the intersection at the same time, so that the developing mark can be placed on the blocking body at the same time. The position is relatively stable, which avoids the inaccuracy of the position of the developing mark caused by the movement of the developing mark, thereby improving the accuracy of the cavity blocking device in distinguishing the directionality.

In particular, the intracavity blocking device in some embodiments of the present invention can identify the circumferential directionality of the intracavitary blocking device when it is located in the human body by setting developing marks at different positions, so as to determine the release direction of the intracavitary blocking device, and Determining the release form of the intraluminal occlusion device in release improves accuracy.

While the present invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is of description and illustration, and not of limitation. Since the invention can be embodied in many forms without departing from the spirit or spirit of the invention, it is to be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be construed broadly within the spirit and scope defined by the appended claims Therefore, all changes and modifications that come within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

An intracavity blocking device, characterized in that it comprises:

The blocking body is a hollow tubular structure and can be contracted or expanded in the radial direction; the blocking body is interconnected by a plurality of connecting rods to form a net shape, and the plurality of connecting rods include a first connecting rod that is connected to each other. and a second connecting rod, the first connecting rod and the second connecting rod are connected to the connecting node at an angle;

A developing mark, which is formed by winding a filamentary material with developing performance around the connecting rod; the developing mark has at least one fixed end and at least one extending end, and the fixed end is located at a connection of the blocking body The extension end is located on the connecting rod and is far away from the fixed end.
The intracavity blocking device according to claim 1, wherein the developing mark is wound in a cross shape at the connecting node.
The cavity blocking device according to claim 1, characterized in that, there is one extension end of the developing mark, and the extension end is located on the first connecting rod or the second connecting rod.
The cavity blocking device according to claim 1, wherein the developing mark has two extending ends, and the two extending ends are arranged on two sides of the fixed end and extend along the first The extension direction of the connecting rod or the second connecting rod extends.
The cavity blocking device according to claim 1, wherein the developing mark has four extending ends, wherein two extending ends are located on the first connecting rod and are arranged on the On both sides of the fixed end, the other two extending ends are located on the second connecting rod and are arranged on both sides of the fixed end.
The cavity blocking device according to claim 1, wherein the developing mark has two extending ends, and the two extending ends are respectively located on the first connecting rod and the second connecting rod .
The cavity blocking device according to claim 1, wherein the extension end of the developing mark is one, and the extension end is located at another connection node, and is simultaneously connected with the extension end at the other connection node. The first connecting rod and the second connecting rod are connected.
The intracavity occlusion device according to claim 7, wherein the other connection node is adjacent to the connection node where the fixed end is located.
The cavity blocking device according to any one of claims 1-8, wherein a clamping sleeve is provided at the extending end, and the clamping sleeve is sleeved on the developing mark and the blocking body the outer circumference of the connecting rod.
The cavity blocking device according to any one of claims 1-8, wherein the outer periphery of the developing mark is covered with a heat shrinkable film.
The intracavity blocking device according to any one of claims 1-8, wherein the developing marker is further fixed on the connecting rod by a polymer suture.
The intracavity occlusion device according to claim 11, wherein one end of the polymer suture is intertwined with the developing marker, and the other end extends to the connection node and is connected to the first The rod and the second connecting rod are wound and knotted to be fixed.
The intracavity occlusion device according to any one of claims 1-12, wherein the developing marks comprise two end developing marks disposed adjacent to the same axial end; the two end developing marks Both are arranged at or adjacent to the interface between the outer peripheral surface and the end surface of the blocking body, and the two end developing marks are arranged at intervals along the circumferential direction of the blocking body.
The intracavity blocking device according to claim 13, wherein the blocking body includes at least two arc surfaces with different curvature radii along the circumferential direction, and the at least two arc surfaces include a first arc surface and a second arc surface the curvature radius of the first arc surface is greater than the curvature radius of the second arc surface, and the long axis of the blocking body is located on the first arc surface;

The two end developing marks are arranged at both ends of the long axis.
The cavity blocking device according to claim 14, wherein the developing mark further comprises another end portion disposed at the junction of the circumferential middle portion of the second arc surface and the end surface or at a position adjacent thereto Development mark.
The cavity blocking device according to claim 14, wherein the developing mark further comprises at least one middle developing mark disposed in the axial middle of the blocking body, and the middle developing mark is located in the first The circumferential center of an arc surface.
The intraluminal occlusion device according to any one of claims 1-16, wherein the occlusion body is formed by interlaced braiding of metal wires, and the first connecting rod and the second connecting rod are respectively in the shape of a first connecting rod. The form of the wire and the second wire.
The intracavity blocking device according to any one of claims 1 to 17, wherein a plug is protruded from the proximal end of the blocking body;

The cavity blocking device further includes a recovery structure; the recovery structure includes a cable and a recovery head arranged at the head end of the cable, the recovery head and the bolt head are detachably connected, and are connected to the tail through the cable Axial movement of the ends pulls the occluding body to move axially.
The cavity blocking device according to claim 18, wherein the recovery head and the plug head are screwed together.
The cavity blocking device according to claim 18 or 19, wherein the plug head is provided with a connecting hole with an internal thread;

The recovery structure further includes a positioning portion disposed around the connecting hole on the bolt head; the positioning portion is annular and coaxial with the connecting hole;

The recovery head includes a main body and a protrusion protruding from the main body, the protrusion is provided with an external thread, and the protrusion is adapted to the size of the connection hole; the main body is embedded in the positioning part, and the The protrusions are correspondingly screwed into the connecting holes.
The cavity blocking device according to claim 20, wherein the plug head is made of ferromagnetic metal, and the protrusion is made of magnetic material.
The cavity blocking device according to claim 20 or 21, wherein the positioning portion is a hollow cylindrical structure, and the positioning portion is fixedly sleeved on the outer periphery of the plug head;

Alternatively, the positioning portion is integrally formed on the plug head.