CN218356483U - Auxiliary spring ring support - Google Patents

Abstract

The utility model provides an auxiliary spring ring bracket, which comprises a self-expansion bracket body and a developing structure arranged on the self-expansion bracket body; the self-expansion type stent body is of a hollow reticular structure as a whole and is formed by weaving at least one weaving wire; the developing structure comprises at least one developing silk, and the developing silk is arranged along the weaving silk and is woven into a net along with the weaving silk. The developing wire comprises at least one section of developing spring section, and the weaving wire is arranged in the developing spring section in a penetrating mode. According to the auxiliary spring ring support provided by the utility model, the developing wire is woven into a net along with the weaving wire, so that the whole support is developed; the two ends and the middle part of the bracket are locally developed and strengthened, so that the whole body outline development can be realized.

Description

Auxiliary spring ring support

Technical Field

The utility model relates to the technical field of medical instrument design, concretely relates to supplementary spring coil support.

Background

Aneurysms are common cardiovascular and cerebrovascular diseases and are extremely lethal once ruptured. Larger aneurysms are more at risk of rupture, and ruptured aneurysms are often acute, short-lived, and prone to poor prognosis, even if treated conservatively. The causes of aneurysm formation are many, and are related to arteriosclerosis, hypertension, myofibrodysplasia, immune factors, genetic factors and the like, and the pathogenesis of the aneurysm is not completely clear at present. There is no fully unified understanding of the treatment of aneurysms, which is the basis for medical treatment, and the treatment of aneurysms mainly includes surgical clamping of the aneurysm and interventional intraluminal treatment. The surgical operation has higher risk, larger wound and more complications, and along with the development of interventional technology, the occurrence of the bracket greatly improves the curative effect of interventional therapy on intracranial aneurysm.

The current clinically major stent techniques include stent assisted spring coil embolization, covered stent placement, and blood flow guide placement. The therapeutic principle of the stent-assisted spring ring embolism is to change the hemodynamic state of the neck of the aneurysm, change the curvature of the parent artery and play a role of a scaffold for the growth of vascular endothelium. Generally, the interventional coil is adopted to embolize the aneurysm, and meanwhile, the coil is embolized by the aid of a stent, so that abnormal displacement of the coil after placement is prevented. Most of the current intracranial auxiliary stents are manually woven or formed into a stent supporting structure by cutting a pipe material by laser, and the current auxiliary stents have the following problems:

1. most of the development on the existing auxiliary stent is local, the two ends of the hand-woven stent are mostly provided with development points, and some laser cutting stents are used for placing the development points on the local part of the stent, so that the process is complex, the development effect is poor, the profile of the stent cannot be directly and clearly seen after the stent is implanted into a blood vessel, the whole profile of the stent needs to be deduced through a dot matrix, and whether the stent is in place or not, whether the stent is attached to the blood vessel or not and whether the stent is completely opened or not can not be objectively judged; therefore, an intracranial auxiliary stent with good developing effect is urgently needed;

2. the two ends of the existing hand-knitted support are exposed to form an open loop, so that the two ends of the auxiliary support are easy to damage the tissue, and the proliferation degree is very easy to improve.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the background technology, the utility model provides an auxiliary spring ring bracket, which comprises a self-expansion bracket body and a developing structure arranged on the self-expansion bracket body; the self-expansion type stent body is of a hollow reticular structure as a whole and is formed by weaving at least one weaving wire; the developing structure comprises at least one developing silk, and the developing silk is arranged along the weaving silk and is woven into a net along with the weaving silk. The developing wire comprises at least one section of developing spring section, and the weaving wire is arranged in the developing spring section in a penetrating mode.

In some embodiments, the developing wire comprises a plurality of developing spring sections, a developing monofilament section is connected between adjacent developing spring sections, the weaving wire is arranged in the developing spring sections in a penetrating manner, and the developing monofilament section and the weaving wire are parallel or twisted.

In some embodiments, the development wire comprises three development spring segments and two development monofilament segments, wherein the development spring segments on both ends of the development wire are located on one end of the self-expanding stent body, and the middle development spring segment is located on the opposite end of the self-expanding stent body; and the two developing monofilament sections and the weaving yarns are woven into a net together.

In some embodiments, the developing wire comprises four developing spring segments and three developing monofilament segments, wherein the developing spring segments at two ends of the developing wire are located at one end of the self-expanding stent body, the two developing spring segments in the middle are located at the opposite end of the self-expanding stent body, and the developing monofilament segments and the weaving wire are woven into a net together.

In some embodiments, the entire length of the developer wire is a developer spring length.

In some embodiments, the two free ends of the braided wire are connected to each other such that the braided wire at the two ends of the self-expanding stent body is in a closed-loop design.

In some embodiments, the self-expanding stent body is woven by using one weaving wire, and the weaving wire is folded back at the end parts of the two ends of the self-expanding stent body to form a net in a forward and reverse spiral weaving manner; two free ends of the braided wire are connected, and the connecting position is positioned at a position except two ends of the self-expansion type bracket body.

In some embodiments, the two free ends of the braided wire are connected together by a spring loop or a rivet tube and the spring loop or rivet tube covers the two ends of the braided wire.

In some embodiments, the woven filaments are joined by butt-jointing or overlapping.

In some embodiments, the braided wires are made of a shape memory metal.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect:

1. according to the auxiliary spring ring support provided by the utility model, the developing wire is woven into a net along with the weaving wire, so that the whole support is developed; the two ends and the middle part of the bracket are enhanced in local development, so that the whole body outline development can be realized. Meanwhile, the developing wire in the utility model comprises at least one section of developing spring section, the developing spring section has a large developing section relative to the single wire, the developing effect is better, and on the other hand, the developing spring section is sleeved on the weaving wire, so that the fixation between the developing spring section and the weaving wire is enhanced, and the displacement of the developing spring section is prevented;

2. the utility model provides an auxiliary spring ring bracket, the closed loop design of both ends of which on one hand ensures that the braided wire has no exposed end, thereby reducing the stimulation of the bracket end part to endothelial cells, reducing the hyperplasia degree and causing little damage to the vascular wall; on the other hand, the integral mechanical property of the bracket is better;

drawings

The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a secondary coil support in accordance with example 1;

FIG. 2 is a partial schematic view at II in FIG. 1;

FIG. 3 is a schematic view of a portion of FIG. 1 at I;

FIG. 4 is a left end view of the secondary coil stent of FIG. 1;

FIG. 5 is a schematic view of a portion of FIG. 1 at III;

FIG. 6 is a right side end view of the secondary spring coil support of FIG. 1;

FIG. 7 is a schematic view of the structure of a developing wire in example 1;

FIG. 8 is a schematic view showing the connection of a developing wire and a knitting wire in example 1;

FIG. 9 is a schematic view of the left end of the secondary coil stent of example 2;

FIG. 10 is a schematic view of the right end of the secondary spring coil support in example 2;

FIG. 11 is a schematic view of the left end of the secondary coil stent of example 3;

FIG. 12 is a schematic view of the right end of the secondary spring coil support in example 3;

fig. 13 is a schematic view of the left end of the secondary coil stent of example 4.

Detailed Description

The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Example 1

Referring to fig. 1-8, the present invention provides an auxiliary spring coil support, comprising a self-expanding support body 100 and a developing structure 200 disposed on the self-expanding support body 100; the self-expandable stent body 100 is a net structure which is tubular as a whole, the self-expandable stent body 100 is formed by weaving at least one weaving wire, and the developing structure 200 comprises at least one developing wire which is arranged along the weaving wire and is woven into a net together with the weaving wire.

The utility model provides an auxiliary spring coil support, be applicable to and be used in the blood vessel that contains the aneurysm structure, auxiliary spring coil support passes through conveyor and carries target position department, the shape that the diameter reduces is presented in conveyor to auxiliary spring coil support during initial time, when auxiliary spring coil support passes through conveyor and reaches the focus position, can realize releasing from the inflation to the shape before not receiving the compression after having eliminated conveyor's the outside constraining force, when auxiliary spring coil embolism, only need according to the particular case who treats the hemangioma, it can to select the suitable support of length diameter to implant arterial vessel, the step that the sacculus expansion is no longer needed after the support reachs the focus position, and convenient operation.

According to the auxiliary spring ring support provided by the utility model, the developing wire is woven into a net along with the weaving wire, so that the whole support is developed; the two ends and the middle part of the bracket are enhanced in local development, so that the whole body outline development can be realized. Meanwhile, the developing spring section is large relative to the developing section of the single wire, the developing effect is better, and the developing spring section is sleeved on the weaving wire, so that the fixation between the developing spring section and the weaving wire is enhanced, and the developing spring section is prevented from shifting;

in this embodiment, the two free ends of the braided wire are connected to each other, so that the braided wire at the two ends of the self-expanding stent body is in a closed loop design. The utility model provides an auxiliary spring ring support through designing its both ends into the closed loop, has following advantage:

1. the two ends of the auxiliary spring ring stent are in closed-loop design, and the braided wire has no exposed end, so that the stimulation of the end part of the stent on endothelial cells is reduced, the proliferation degree is reduced, and the injury on the vascular wall is small;

2. the integral mechanical property is better; concretely, when a certain point of supplementary spring coil support received radial pressure, this point supplementary spring coil support diameter diminishes, supplementary spring coil support warp through upwards weaving net crosspoint angle deformation, transmit other positions of support with power, the tip to transmitting supplementary spring coil support, thereby lead to the whole corresponding deformation that produces of support, because the specific certain high elasticity of support silk material itself, when the helical shape and the pitch of support silk material change, can produce corresponding elastic force, form corresponding radial holding power from triggering the support whole. Generally, the larger the diameter change of the stent is, the larger the triggered radial supporting force is, and when the overall deformation of the stent reaches a certain diameter, the radial supporting force of the stent is balanced with the received radial pressure; however, for the auxiliary spring ring stent with two ends of braided wires in an open state, when force is transmitted to the two ends, the stress can be released directly through the open ends, and the whole stent cannot have better radial supporting force; for a secondary coil stent with one open end and one closed loop, there is also the problem that the force is released from the open end;

both ends of the auxiliary spring ring bracket in the utility model are closed-loop, which ensures that the force is not directly released when being transmitted to both ends of the auxiliary spring ring bracket, thereby ensuring that the auxiliary spring ring bracket has better radial supporting force; meanwhile, the closed end of the auxiliary spring ring support cannot directly release stress, but the deflection angle of the support wire material can also deform to a certain degree, so that certain deflection elastic force is further generated, and the auxiliary spring ring support and the deflection elastic force are superposed to cause that the auxiliary spring ring support forms larger corresponding radial supporting force.

Of course, in other embodiments, the self-expandable stent body 100 may have a closed loop of braided filaments at one end and an open loop at the other end, or may have both ends open, which is not limited herein and may be selected according to specific situations.

Further, it is preferable that the connection point of the two free ends of each of the braided wires is located at a position other than the two ends of the self-expandable stent body 100, so that the braided wires at the two ends of the self-expandable stent body 100 are in a closed loop design. Of course, in other embodiments, the connection point of the two free ends of the braided wire may be located at the end of the self-expandable stent body 100, which is not limited herein and can be adjusted according to specific situations.

In this embodiment, the self-expandable stent body 100 is woven by using one weaving wire, the weaving wire is woven to form a positive and negative spiral between two ends of the self-expandable stent body, the two ends of the weaving wire are connected after weaving, and the connection position is located at other positions except two ends of the self-expandable stent body.

The weaving wire is woven into a net according to the specific situation, for example, on a mould, the starting end of the weaving wire is positioned near the middle of the self-expansion type support body, the weaving wire is spirally woven to the left end, then rotates to form a closed loop, then is spirally woven to the other right side in the opposite spiral direction, rotates to form a closed loop after reaching the other end, then is woven to the left side, and then is woven back and forth, after a net structure is formed, the tail end of the weaving wire is woven to the position of the starting end and is fixedly connected with the position of the starting end.

Of course, in other embodiments, the self-expanding stent body 100 may be woven into a mesh using a plurality of braided wires, for example, when the braided wires at one end of the self-expanding stent body 100 are closed and the other end is open, the self-expanding stent body 100 may be woven into a mesh by taking 6 to 8 braided wires one by one in a forward-reverse spiral manner; for another example, when the self-expanding stent body 100 has openings at both ends of the woven filaments, the self-expanding stent body 100 may be woven into a mesh from 8 to 48 woven filaments. The method is not limited and can be adjusted according to specific situations.

In this embodiment, referring to FIGS. 1-2, the ends of the braided wire at both ends (i.e., the starting and ending ends) are connected together by a coil 300; specifically, two ends of the braided wire are butted, and the spring ring 300 is sleeved on and covers the two ends of the braided wire to fix the braided wire and the braided wire. Spring coil 300 have comparatively soft, advantage such as compliance height, the utility model discloses a spring coil 300 weaves the connection of silk tip, and spring coil 300 can warp together with weaving the silk, to the corresponding reduction of the amazing of vascular wall to can reduce relevant complication. Further, the spring ring 300 can be welded with a braided wire, so that the connection of the tail ends of the wires is firmer, the connector is less prone to being broken, and the performance of the auxiliary spring ring support is more reliable.

Of course, in other embodiments, the connection manner of the two ends of the braided wire is not limited to the above, and a connection manner of riveting with a riveting ring, welding, or welding and riveting may also be adopted, which is not limited herein and may be adjusted according to specific situations.

In this embodiment, the braided wire is made of a biocompatible material with shape memory properties, specifically, the braided wire is made of a shape memory alloy, and the secondary spring coil stent made of the shape memory alloy has good compressibility (superelasticity) and can be reduced in diameter to enter a small blood vessel. Preferably, the braided wire is a nickel titanium alloy wire.

In this embodiment, the developing structure 200 employs a developing filament, the developing filament is disposed along the knitting filament, and the developing filament is knitted into a net along with the knitting filament; of course, in other embodiments, the number of the developing wires is not limited to one, and a plurality of developing wires may be arranged on the self-expandable stent body 100 in the above manner, and is specifically adjusted according to specific needs, and is not limited herein.

In this embodiment, the developing wire includes at least one developing spring section, and the weaving wire is inserted into the developing spring section; the specific developing wire can be directly the whole section as one section of developing spring section, and also can be including a plurality of developing spring sections, when the developing wire is including the multistage developing spring section, be connected with the developing monofilament section between the adjacent developing spring section, weave the silk and wear to establish in the developing spring section, the developing monofilament section with weave the parallel or winding transposition of silk.

In a further embodiment, the developing wire includes four developing spring segments and three developing monofilament segments.

Specifically, referring to fig. 7, the developing wire includes four developing spring segments, which are a first developing spring segment 201, a second developing spring segment 203, a third developing spring segment 205, and a fourth developing spring segment 207, respectively, and a developing monofilament segment is connected between adjacent developing spring segments, which is a first developing monofilament segment 202 connecting the first developing spring segment 201 and the second developing spring segment 203, a second developing monofilament segment 204 connecting the second developing spring segment 203 and the third developing spring segment 205, and a third developing monofilament segment 206 connecting the third developing spring segment 205 and the fourth developing spring segment 207, respectively.

Referring to fig. 8 again, the weaving wires are inserted into the respective developing spring segments to achieve fixation, and the respective developing monofilament segments are parallel to the weaving wires, but in other embodiments, the respective developing monofilament segments and the weaving wires may also be twisted, and the developing wires are connected with the weaving wires in the above manner and then woven into a net together with the weaving wires.

Further, with reference to fig. 1 and fig. 3 to 6, the first developing spring segment 201 is sleeved on a closed loop woven wire on the right end of the self-expanding stent body 100, the first developing monofilament segment 202 is woven together with the woven wire to the left end, the second developing spring segment 203 and the third developing spring segment 205 are sleeved on the same closed loop woven wire on the left end of the self-expanding stent body 100, the third developing monofilament segment 206 is woven together with the woven wire to the right end, and the fourth developing spring segment 207 is sleeved on another closed loop woven wire on the right end of the self-expanding stent body 100.

Of course, in other embodiments, the number of developing spring segments and developing monofilament segments included in the developing wire may be adjusted as the case may be; for example, all the developing wires are developing spring sections; for another example, the developing wire includes three developing spring segments and two developing single wire segments, wherein the developing spring segments on both ends of the developing wire are located on one end of the self-expanding stent body, and the developing spring segment in the middle is located on the opposite end of the self-expanding stent body; the two developing monofilament sections and the knitting yarn are knitted into a net together.

In this embodiment, the connecting structure of the two free ends of the knitting yarn can be directly replaced by the developing spring section, which is not limited herein and can be adjusted according to specific situations.

Example 2

This example is an adjustment made on the basis of example 1.

Referring to fig. 9 to 10, the self-expanding stent body 100 in this embodiment is provided with two developing wires 200, so that four developing spring segments are respectively provided on both ends of the self-expanding stent body 100.

The present embodiment further increases the developing effect by increasing the number of developing wires.

Other structures of the secondary coil stent in this embodiment can be described in embodiment 1, and are not described herein.

Example 3

This example is an adjustment made on the basis of example 1.

Referring to fig. 11 to 12, the self-expandable stent body 100 in the present embodiment is provided with four developing wires 200; so that eight developing spring segments are provided on both ends of the self-expanding stent body 100, respectively.

The present embodiment further increases the developing effect by increasing the number of developing wires.

Other structures of the secondary spring coil support in this embodiment can be referred to the description in embodiment 1, and are not described herein again.

Example 4

This example is an adjustment made on the basis of example 1.

Referring to fig. 13, in this embodiment, a developing wire 200 is disposed on the self-expanding stent body 100, and the developing wire 200 includes three developing spring segments and two developing monofilament segments, where the developing spring segments on two ends of the developing wire are located at one end of the self-expanding stent body, and the middle developing spring segment is located at the opposite end of the self-expanding stent body; and weaving the two developing monofilament sections and the weaving silk into a net. That is, the second developing spring segment 203 and the third developing spring segment 205 in embodiment 1 are combined into one, and the developing segment 204 connecting the second developing spring segment 203 and the third developing spring segment 205 is also designed as a developing spring segment;

as shown in fig. 13, the developing spring segments (203, 204, 205) located at one end of the self-expandable stent body in this embodiment are bent along with the braided wire, so that the design is favorable for ensuring that the farthest point at the end of the self-expandable stent body can be developed, thereby further ensuring the developing effect.

It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope thereof. Although the embodiments of the present invention have been described, it is understood that the present invention should not be limited to these embodiments but various changes and modifications can be made by one skilled in the art within the spirit and scope of the present invention as hereinafter claimed.

Claims (10)

1. An auxiliary spring coil support is characterized by comprising a self-expansion support body and a developing structure arranged on the self-expansion support body; the self-expansion type stent body is of a hollow reticular structure as a whole and is formed by weaving at least one weaving wire;

the developing structure comprises at least one developing wire, and the developing wire is arranged along the weaving wire and is woven into a net together with the weaving wire; the developing wire comprises at least one section of developing spring section, and the weaving wire is arranged in the developing spring section in a penetrating mode.

2. The secondary spring coil support of claim 1 wherein said developer wire includes a plurality of sections of developer spring, adjacent developer spring sections having developer monofilament sections attached thereto, said developer monofilament sections being parallel to or twisted about said braided wire.

3. The secondary spring coil stent of claim 2, wherein the developer wire comprises three developer spring segments and two developer monofilament segments, wherein the developer spring segments on both ends of the developer wire are located on one end of the self-expanding stent body and the middle developer spring segment is located on the opposite end of the self-expanding stent body; and the two developing monofilament sections and the weaving yarns are woven into a net together.

4. The support spring coil support of claim 2, wherein the development wire comprises four development spring segments and three development monofilament segments, wherein the development spring segments on both ends of the development wire are located on one end of the self-expanding support body, the middle two development spring segments are located on the opposite end of the self-expanding support body, and the development monofilament segments are woven with the woven wire into a mesh.

5. The secondary spring coil support of claim 1 wherein the developer wire is a developer spring section in one piece.

6. The secondary spring coil stent of claim 1 wherein the two free ends of the braided wire are interconnected such that the braided wire at the two ends of the self-expanding stent body is in a closed-loop design.

7. The secondary spring coil stent as set forth in claim 6, wherein the self-expanding stent body is woven using one woven wire, the woven wire being folded back at the ends of both ends of the self-expanding stent body to present a positive and negative spiral woven mesh; two free ends of the braided wire are connected, and the connecting position is positioned at a position except two ends of the self-expansion type bracket body.

8. A secondary spring coil support according to claim 6 or 7, wherein the two free ends of the braided wire are connected together by a spring coil or rivet over which the spring coil or rivet overlies the two ends of the braided wire.

9. The support coil of claim 4, wherein the connecting means of the braided wires is butt-jointed or lap-jointed.

10. The secondary spring coil stent as set forth in claim 1 wherein said braided wire is formed of a shape memory metal.

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