CN212281526U

CN212281526U - Bolt taking support with development points of net cage cross structure

Info

Publication number: CN212281526U
Application number: CN202020641117.9U
Authority: CN
Inventors: 王昂
Original assignee: Guangzhou Chuangjing Medical Technology Co ltd
Current assignee: Guangzhou Yijie Medical Technology Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-01-05
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a support is tied in getting of cylinder mould cross structure area development point, it belongs to the utility model belongs to the technical field of interventional therapy, it includes one and passes through laser cutting by the nickel titanium pipe to take the cylinder mould that high temperature design formed, the cylinder mould includes many elastic wires, the elastic wire crosses each other, forms a plurality of end face portions that cross, its characterized in that: the intersection end face part is provided with a containing hole; each accommodating hole is fixedly provided with a developing block in a one-to-one correspondence. The utility model is used for overcoming the defect that the development effect of the filament after the nickel-titanium tube is cut under X-ray is poor, and the development point or the development block is arranged at the cross structure, so that the development effect of the bracket can be enhanced, and the position of the bracket in the human body can be determined; its advantage does: the wall thickness or the outer diameter of the bracket does not need to be increased, the outer diameter after shrinkage is also avoided from being increased, and the bracket can be matched with a micro catheter with smaller size for use, thereby reducing the conveying difficulty of the bracket in a human body.

Description

Bolt taking support with development points of net cage cross structure

Technical Field

The utility model belongs to intervene the treatment apparatus field, especially relate to a support is tied in getting of cylinder mould cross structure area development point.

Background

Means for treating coronary and intracranial thrombosis generally require thrombolysis of the occluded area of the vessel with drugs or aspiration or capture of the thrombus in the occluded area with interventional procedures. The therapeutic devices involved in capturing the thrombus comprise a micro catheter, a sheath tube, a traction guide wire, a thrombus removal support and the like. The thrombus taking bracket is the most key element for catching thrombus.

The embolectomy stent is generally mesh-shaped, and is formed by laser cutting a nickel titanium tube and adopting high-temperature setting to form a mesh cage, wherein the mesh cage is provided with one side close to a distal end and one side close to a proximal end, and is generally provided with a developing ring or a developing block.

The following are several prior patents relating to the overall structure of the bolt extractor and its development components: (1) CN201610013494.6 discloses a blood vessel thrombus taking device with a thorn-shaped structure and a thrombus therapeutic apparatus thereof, wherein a developing ring and a developing ring are arranged on the thrombus taking device in a welding or pressing or gluing mode; (2) CN201711466707.1 discloses an embolectomy device, the distal end of the external sheath tube is provided with developing marks, and the proximal end, the distal end and the maximum height of the embolectomy device are respectively provided with developing marks; (3) EP2926747B1 discloses a thrombus removal device, each of both ends of a mesh cage being provided with a development block; (4) US20190216476A1 discloses an embolectomy stent and an improved structure thereof, wherein a developing block is arranged at a part of the center of a net cage where a plurality of silk ribbons meet, and the structure can also better prevent thrombus fragments from being left in a diseased blood vessel during catching.

However, none of the above prior patents can achieve better and more reasonable visualization effect, and particularly, none of the above solutions can reasonably reflect the bending degree of the current position of the blood vessel where the embolectomy device is located and the opening and closing degree of the current position of the blood vessel where the embolectomy device is located. In addition, the stent has a large diameter when in a contracted state, which affects the relative movement of the stent in the microcatheter.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the background art reflects, the utility model aims at providing a embolectomy support of cylinder mould cross structure area development point for can observe the embolectomy support more rationally in the art and be located the specific position of current blood vessel, and overcome the shortcoming that sets up the development ring scheme among the prior art. The specific scheme of the application is as follows:

the embolus support of getting of cylinder mould cross structure area development point, it includes a cylinder mould, the cylinder mould includes many elastic wires, the elastic wire intersects each other, forms a plurality of end face portions that intersect each other. The intersection end face part is provided with a containing hole; each accommodating hole is fixedly provided with a developing block in a one-to-one correspondence.

Further, the combination mode that the developing block is fixed in the accommodating hole is welding, embedding or adhesion.

Further, the developing block is cylindrical, nail-cap-shaped, circular truncated cone-shaped or hemispherical.

Further, the accommodating hole is a blind hole, a through hole, a bowl-shaped hole or a spherical segment hole.

Further, the hole positions of the accommodating holes are located on the inner side face of the cylinder mould.

Furthermore, the mesh units of the mesh cage are parallelogram, and the length ratio of the first diagonal line and the second diagonal line of the parallelogram is 1: 1-1.5.

Further, the side of the netpen is open or closed.

Further, the surface of the mesh cage is covered with an outer coating containing an anticoagulant or antiplatelet agent.

Further, the cage is divided into a capturing section near the distal end for capturing thrombus and a diverging section near the proximal end, the diverging section having a diverging angle of 30 ° to 45 °.

Further, the length of the net cage is selected to be in the range of 10mm to 50mm, and the diameter of the net cage is selected to be in the range of 2mm to 5 mm.

Compare in prior art, implement the beneficial effects of the utility model reside in that:

(1) the plurality of developing blocks are connected in the accommodating hole, and can form information reflecting the morphological characteristics of the current thrombus removal support under the X-ray environment, so that an operator can clearly observe the opening and closing degree and the over-bending condition of the thrombus removal support in the implementation process of the interventional operation;

(2) the shapes of the developing block and the accommodating hole are matched with each other, and in a certain preferred mode, for example, the accommodating hole is a spherical segment hole and is arranged on the inner side surface of the cylinder mould, the effect of fixing the developing block is relatively stronger, and the influence of stress is relatively less;

(3) the nickel-titanium tube is cut by laser and is shaped at high temperature to form the mesh cage. The net cage is of an open-loop structure, can be bent to an open-close structure to a certain degree, is beneficial to adapting to slightly-changed diameters at different positions in a blood vessel, can be collapsed and folded when passing through the blood vessel under a compressed condition, has self-expansion recovery capability in a free state, and has good wall-sticking property;

(4) the utility model is mainly applied to the removal of thrombus in blood vessels of cranium, brain and coronary vessels, but does not exclude the opportunity that the utility model can be applied to other adaptive parts of human body.

Drawings

Fig. 1 is a schematic structural view of the elastic silk net of the present invention after being wound and formed into a cylinder mould;

fig. 2 is a schematic view of another perspective of the netpen of the present invention;

fig. 3 is a schematic view of the expanded cylinder mould of the present invention;

FIG. 4 is an enlarged view taken at FIG. 1A;

fig. 5A is a schematic view (circular hole shape) of the arrangement relationship between the developing block and the accommodating hole according to the preferred embodiment of the present invention;

fig. 5B is a schematic view showing the arrangement relationship between the developing block and the accommodating hole (a shape of the accommodating hole) in the preferred embodiment of the present invention;

fig. 5C is a schematic view showing the arrangement relationship between the developing block and the accommodating hole (bowl shape) in the preferred embodiment of the present invention;

fig. 5D is a schematic view showing the arrangement relationship between the developing block and the accommodating hole (hole in gap of ball) according to the preferred embodiment of the present invention;

fig. 6A is a schematic view (max) of the change in the crimp of the netpen according to the preferred embodiment of the present invention;

fig. 6B is a schematic diagram of the change in the curling degree of the netpen in the preferred embodiment of the present invention (moderate);

fig. 6C is a schematic view (minimum) of the variation of the curling degree of the netpen in the preferred embodiment of the present invention;

fig. 7A is a schematic view of the use of the netpen of the present invention before it passes through a thrombus occlusion area;

fig. 7B is a schematic view of the use of the netpen of the present invention in capturing thrombus after it has passed through the thrombus-occluded area.

Wherein, 100, a net cage; 101. an accommodation hole; 110. an intersection end face portion; 111. a circular arc-shaped overlapping structure; 112. drawing wires; 113. a first edge portion; 114. a second edge portion; 115. capturing and segmenting; 116. divergent segmentation; 117. winding the corner; 118. a projection; 119. a circuitous part; 120. dislocation distance; 200. a developing block; 201. a welding area; 300. an outer catheter; 301. a microcatheter; 400. a blood vessel; 401. thrombosis.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings, embodiments and modifications. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

To more clearly describe the structure of the embolectomy stent with visualization sites in the netpen crossing structure, the meaning of the two concepts "distal" and "proximal" are defined herein, which are conventional terms in the field of interventional medical devices. Specifically, "distal" refers to the end of the procedure distal to the operator, and "proximal" refers to the end of the procedure proximal to the operator. Of course, for a single device object, the "proximal" end may also be defined as the end thereof closer to the operator, and the "distal" end may also be defined as the end thereof further from the operator. In the present invention, the expressions of "distal direction" and "proximal direction" are only used for the reference direction. In the utility model, the end close to the far end is only used for the end face or the end point of a certain shape-containing device object far away from the operator; the term "end near the proximal end" is used only to describe one end face or point of the device object near the operator.

In addition, for convenience of describing individuals such as each part and component, the present invention uses descriptions indicating positional relationships such as "left", "right", "front", "rear", "upper", "lower", and the like; the utility model discloses in have descriptions of taking the serial number such as "first", "second", only be used for distinguishing the object of description in principle, do not relate to the meaning of any importance difference, range difference.

Referring to fig. 1 to 7B, a embolectomy support with development sites in a mesh cage crossing structure comprises a mesh cage 100 and a plurality of development blocks 200. The cylinder mould 100 includes many elastic wires, the elastic wires intersect each other, form a plurality of end face portions that intersect, the accommodation hole 101 has been seted up to the end face portion that intersects to, every accommodation hole 101 one-to-one ground, fixedly are provided with the development piece 200. Specifically, the netpen 100 is a capturing device formed by cutting a nickel-titanium tube by laser and shaping at a high temperature, which belongs to one of the existing shaping means and is only used for reference in implementation. To disclose more detailed implementation information, the development block 200 may be made of a material that is visible under X-rays, such as gold, platinum iridium, platinum tantalum, or the like. The mesh cage 100 is made of a shape memory material, such as nitinol. The developing block 200 may be fixed to the receiving hole by welding or fitting, or may be adhered to the receiving hole 101 by using an existing adhering means. On the other hand, as a preferred embodiment, the surface of the netpen 100 may be covered with an outer coating containing an anticoagulant or antiplatelet agent.

Several embodiments of the aspects will be provided below for reference, and reference may be made to fig. 5A, 5B, 5C, and 5D. The developing block 200 may have a cylindrical shape, a nail-cap shape, a circular truncated cone shape, or a hemispherical shape. Correspondingly, the receiving hole 101 may be a blind hole, a through hole, a bowl-shaped hole, or a spherical segment hole. The bowl-shaped hole is recommended to be matched with the circular truncated cone-shaped developing block, and the spherical-segment hole is recommended to be matched with the hemispherical developing block. For the scheme of selecting the cylindrical or nail-cap-shaped developing block, the matching can be realized in a blind hole mode or a through hole mode.

Since the outer side surface of the wound elastic silk screen has an opening stress, which is disadvantageous for the fixing effect of the developing block in the accommodating hole, the opening position of the accommodating hole 101 is preferably located on the inner side surface of the cylinder mould as a preferred embodiment. In this way, the developing block 200 is subjected to only a small amount of compressive stress, and the risk of falling off is greatly reduced compared to the manner of being disposed on the outer side surface.

As a preferred embodiment, the mesh cage is provided with grid units in a parallelogram, the length ratio of a first diagonal line and a second diagonal line of the parallelogram is 1: 1-1.5, and the preferred parallelogram can be in a diamond shape. Of course, the grid cells may be of equal or unequal size.

The sides of the netpen 100 may be open or closed. Of course, it is preferably open, the purpose of this preferred embodiment being to accommodate differences in vessel diameter at different locations of the vessel and/or minor variations in vessel diameter that may be encountered during the procedure. See fig. 2, 3, 6A, 6B, and 6C. Because the netpen 100 is in an open-loop shape, an axial side gap is reserved on the side surface of the netpen at the beginning of formation, so that a structure capable of being bent and opened to a certain degree is formed, and the netpen is favorable for adapting to slightly-changed diameters at different positions in a blood vessel. In addition, the net cage can be collapsed and folded under the condition of penetrating through the blood vessel under pressure, has the self-expansion recovery capability in the free state, and has good adherence property. In particular, it may be that the first and

second edge portions

113, 114 of the netpen 100 overlap to form a circular arc-shaped overlapping structure 111. Referring to fig. 6A, 6B, and 6C, the resulting wrap angle 117 angle will adaptively change as the vessel wall changes.

Referring to fig. 3, as a preferred embodiment, the netpen 100 is divided into a distal, capture segment 115 for capturing thrombus, and a proximal diverging segment 116 with a diverging angle of 30 ° to 45 °.

In order to further facilitate the implementation of the solution disclosed by the present invention for the skilled person, the length of the netpen can be chosen in the range of 10mm to 50mm, and its diameter can be chosen in the range of 2mm to 5 mm.

A get of cylinder mould cross structure area development point and tie support, place therapeutic instrument in and cooperate other modules and/or part to use when the operation. Accordingly, the therapeutic apparatus should include, but not be limited to: an outer catheter 300, a hemostatic valve device, a microcatheter 301, a pull wire 112, and a thrombectomy stent. In addition, the utility model can be used before and after the bolt is taken out, as shown in fig. 7A and fig. 7B. This is not repeated since it does not relate to the invention of the present invention.

The above description is only for the purpose of illustrating the preferred embodiments and modifications of the present invention, and is not intended to limit the present invention to the particular embodiments and modifications, and all modifications, equivalents and improvements that are within the spirit and principles of the present invention are deemed to be covered by the present invention.

Claims

1. Support is tied in getting of cylinder mould cross structure area development point, including a cylinder mould, the cylinder mould includes many elastic wires, elastic wire intersects each other, forms a plurality of end face portions that intersect, its characterized in that: the intersection end face part is provided with a containing hole; each accommodating hole is fixedly provided with a developing block in a one-to-one correspondence.

2. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the combination mode that the developing block is fixed in the accommodating hole is welding, embedding or adhesion.

3. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the developing block is cylindrical, nail-cap-shaped, circular truncated cone-shaped or hemispherical.

4. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the accommodating holes are blind holes, through holes, bowl-shaped holes or spherical-segment holes.

5. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the opening position of the accommodating hole is positioned on the inner side surface of the cylinder mould.

6. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the mesh units of the mesh cage are parallelogram, and the length ratio of a first diagonal line to a second diagonal line of the parallelogram is 1: 1-1.5.

7. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the side of the net cage is open or closed.

8. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the surface of the net cage is covered with an outer coating containing anticoagulant or antiplatelet agent.

9. The embolectomy support of claim 1, wherein the development site is in a cross-cage configuration, and wherein: the cage is divided into a capturing section near the distal end for capturing thrombus and a diverging section near the proximal end, the diverging section having a divergence angle of 30 ° to 45 °.

10. A visualization point retrieval stent for a netpen cross structure as defined in any one of claims 1 to 9, wherein: the length selection range of the net cage is 10mm to 50mm, and the diameter selection range of the net cage is 2mm to 5 mm.