CN113208788A

CN113208788A - Adjustable support with buckle structure

Info

Publication number: CN113208788A
Application number: CN202110345201.5A
Authority: CN
Inventors: 赵晓辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-08-06

Abstract

The invention discloses an adjustable bracket with a buckle structure, which comprises a bracket body with a cavity and elastic buffer ribs arranged on the bracket body, wherein the bracket body is formed by spirally winding a single metal wire or a plurality of composite metal wires or by 3D printing of an elastic polymer material and has two configurations of axial compression and expansion, the buffer ribs are in a slender S shape and are fixed on the outer surface or the inner surface of the bracket body in a spot welding or bonding mode, when the bracket is axially compressed or expanded, the buffer ribs are correspondingly compressed or expanded along with the buffer ribs, the buffer ribs are two and are symmetrically arranged along the central axis of the bracket, one end of each buffer rib is attached to the first end of the bracket body, the other end of each buffer rib is attached to the second end of the bracket body, and the first end and the second end of the bracket body are arranged tightly compared with the middle section, the buffer rib is a laminated end formed by tightly winding wires for 2.5 circles, and the slender S-shaped buffer rib has the functions of supporting and buffering.

Description

Adjustable support with buckle structure

Technical Field

The invention relates to the technical field of implantable in-vivo stents, in particular to an adjustable stent with a buckle structure.

Background

At present, common diseases of cardiovascular and cerebrovascular mainly include arterial stenosis, aneurysm and the like, the cardiovascular and cerebrovascular diseases are one of important reasons causing human death, stent intervention is one of main means for treating the cardiovascular diseases, and clinically widely used vascular stents mainly comprise metal bare stents and drug eluting stents. The metal bare stent has remarkable curative effect after clinical treatment, but through more than ten years of application, some defects and disadvantages are gradually exposed, such as easy thrombosis, high restenosis rate, vessel wall injury and the like, and clinical research shows that the incidence rate of restenosis in the stent in 6 months after the metal bare stent is implanted is as high as 20-30%. The application of the drug-eluting stent reduces the restenosis rate to below 10% within 1 year after operation, but clinical studies show that the drug-eluting stent has poor long-term curative effect, is easy to form thrombus and has high fatality rate or myocardial infarction incidence rate. The problem of restenosis in the stent seriously affects the life quality and life health of patients, and is a technical problem to be solved urgently.

The prior art stents are mostly laser-cut tubular stents, although there are also wire-braided mesh stents, and a large number of different stents are used in different treatment procedures, and these stents can be delivered to the lesion site of the blood vessel through a catheter, for example: abnormal blood vessels such as angiostenosis, hemangioma, arteriovenous fistula and the like; most stents in the prior art are tubular stents cut by laser, and even a reticular stent woven by metal wires is provided, however, the actual operation condition is sometimes complex, the shapes and positions of most stents after release are difficult to satisfy, the requirements of treatment per se cannot be met, and the stents often need to be firstly recycled into a catheter or a sheath for secondary positioning and release. However, the existing support cannot realize the functions of recoverability and repeatable positioning; some can only realize partial recovery function, but cannot meet other requirements.

In addition, local vascular injury caused by expansion of the stent during implantation is one of the root causes for inducing in-stent restenosis, and the expansion of the existing metal bare stent, drug eluting stent and biodegradable stent during implantation can cause vascular injuries of different degrees, and the stability after implantation is insufficient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an adjustable bracket with a buckle structure, which is stable in fixing and supporting, safer to implant, reliable in inhibiting restenosis and obvious in postoperative curative effect.

An adjustable bracket with a buckle structure comprises a bracket body with a cavity and elastic buffer ribs arranged on the bracket body, wherein the bracket body is formed by spirally winding a single metal wire or a plurality of composite metal wires, for example, the elastic metal wires are wound around a die and are subjected to shaping treatment, or the elastic buffer ribs can be formed by 3D printing of elastic polymer materials and have two configurations of axial compression and expansion, the buffer ribs are in a long and thin S shape and are fixed on the outer surface or the inner surface of the bracket body in a spot welding or bonding mode, when the bracket is axially compressed or expanded, the buffer ribs are correspondingly compressed or expanded along with the buffer ribs, so that the expansion of the bracket is buffered on the premise of ensuring the radial supporting force, the damage to the bracket body or an implanted tube cavity caused by sudden expansion or excessive expansion is avoided, the two buffer ribs are symmetrically arranged along the central axis of the bracket, each of the cushioning ribs has one end attached to the first end of the bracket body and another end attached to the second end of the bracket body. The slender S-shaped buffer rib not only saves materials, but also has better supporting and buffering functions.

Preferably, the preparation material of the stent body has biocompatibility and does not have the shape memory characteristic.

Preferably, the stent may be coated with a film entirely or partially outside the body, or may be uncoated.

Preferably, each buffering rib is of an integral structure formed by bending an elastic material wire.

Preferably, each buffering rib can also be of an integrated structure formed by connecting two elastic material wires through end ends.

Preferably, the end connection is a snap connection, wherein one end of the snap connection is provided with a closed loop structure, the end connected with the snap connection is provided with an open loop structure, the open loop structure is inserted into the closed loop structure along the opening during connection, and the opening is compressed to be smaller so as to avoid falling off from the opening, and the end connection can be welding, bonding or sleeving.

Preferably, the connecting part of the end ends is the middle part of the elongated S-shaped buffer rib, namely, each connected section is of a C-shaped structure.

Preferably, the buffering muscle is all fixed connection with each spiral section of support body, also can link to each other every interval spiral section, and the spiral section that does not link to each other with the buffering muscle is hugged closely with the buffering muscle.

Preferably, the first end and the second end of the stent body are arranged closely compared with the middle section, and can be laminated ends formed by tightly winding metal wires for 2.5-3.5 circles, the wires arranged closely at the first end and the second end have higher hardness and lower elasticity than the middle section through quenching treatment or other treatment modes, and the metal wires at joints of the laminated ends are provided with second buckle structures for connecting with a delivery system.

Preferably, each buffer rib is connected with the first end or the second end of the stent body in a welding or bonding mode and is connected with the innermost circle of the wires closely arranged at the first end or the second end, namely, the side opposite to the second ring buckle structure.

When the adjustable stent is used, the adjustable stent is compressed in a delivery catheter, the adjustable stent is delivered to a target position through the matching of a delivery guide wire and the delivery catheter, before the delivery catheter and the delivery guide wire are withdrawn, the length and the position of the stent are slowly adjusted by pushing and pulling the second buckle structure according to the actual placement error, and when the stent completely covers the target position and reaches the proper length, the delivery catheter and the delivery guide wire are withdrawn, so that the implantation of the adjustable stent is completed.

This application is through the setting of heliciform main part and range upon range of end thereof, can be under the circumstances of guaranteeing sufficient compliance, make the tip warp because of the push-and-pull when avoiding implanting, it is slow to set up the buffering muscle in the support main part simultaneously, it sets up to long and thin S form to compare other shapes (like W form or wave) save material to cushion the muscle, can satisfy support and buffering demand again, the setting that cushions the muscle is slow can satisfy the sufficient radial holding power of support, can provide the buffering for it is flexible again, avoid leading to the fact the damage to support itself and implanted lumen because of suddenly flexible or excessive flexible, thereby it is safer to make the implantation, and is stable. In addition, the buckle structures are arranged at the joints of the end ends of the combined buffer ribs, the gaps among the buckle structures can meet the initial adjustment of the support to a greater extent, the support is adjusted more smoothly through telescopic inertia, the situation of blocking or locking is avoided, and the operation is more convenient.

Drawings

FIG. 1 is a schematic view of an adjustable support according to the present invention.

FIG. 2 is a schematic view of the laminated end structure of the stent body according to the present invention.

Fig. 3 is a schematic structural diagram of the combined type buffer rib of the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The adjustable bracket 1 with the buckle structure provided by the invention is provided with the buffer ribs 2, the

buckle pieces

7 and 8, the spiral bracket main body 10 and the bracket which is laminated and integrated and takes elastic metal or polymer as a base material, and the bracket is stable in fixing and supporting, safer in implantation, reliable in restenosis inhibition and obvious in postoperative curative effect.

Example 1

As shown in fig. 1 to 3, an adjustable bracket with a buckle structure comprises a bracket body 10 with a cavity, and an elastic buffer rib 2 arranged on the bracket body 10, wherein the bracket body 10 is formed by spirally winding a single metal wire or a plurality of composite metal wires, such as being formed by winding an elastic metal wire around a die and shaping, or being formed by 3D printing of an elastic polymer material, and has two configurations of axial compression and expansion, the buffer rib 2 is in a slender S shape and is fixed on the outer surface or the inner surface of the bracket body 10 by spot welding or bonding, when the stent is compressed or expanded axially, the buffer ribs 2 are correspondingly compressed or expanded, the two buffer ribs 2 are symmetrically arranged along the central axis of the bracket, one end of each buffer rib 2 is attached to the first end 3 of the bracket body, and the other end of each buffer rib 2 is attached to the second end 4 of the bracket body.

The preparation material of the stent body 10 has biocompatibility and does not have the shape memory characteristic.

The stent body 10 may be completely or partially covered with a film or not covered with a film.

Each buffer rib 2 is formed by bending an elastic material wire into a whole.

Buffer 2 and the equal fixed connection of each spiral section of support body 10, also can link to each other every interval spiral section, and the spiral section that links to each other with buffer 2 is not hugged closely with buffer 2.

The first end 3 and the second end 4 of the stent body 10 are arranged more closely than the middle section 5, and can be laminated ends formed by tightly winding metal wires for 2.5-3.5 circles, the wires tightly arranged at the first end 3 and the second end 4 have higher hardness than the middle section 5 and lower elasticity than the middle section 5 through quenching treatment or other treatment modes, and the joint of the metal wires at the laminated ends is provided with a second annular buckling structure 9 for connecting with a delivery system.

The connection mode of each buffer rib 2 and the first end 3 or the second end 4 of the bracket body 10 is welding or bonding, and the buffer rib is connected to the innermost circle of the wires closely arranged at the first end 3 or the second end 4, namely the side opposite to the second buckle structure 9.

When the adjustable stent is used, the adjustable stent 1 is compressed in a delivery catheter, the delivery catheter and the delivery catheter are matched to deliver the adjustable stent to a target position, before the delivery catheter and the delivery catheter are withdrawn, the length and the position of the stent are slowly adjusted by pushing and pulling the second ring buckling structure 9 according to the actual placement error, and when the stent completely covers the target position and reaches the proper length, the delivery catheter and the delivery catheter are withdrawn, so that the implantation of the adjustable stent is completed.

Example 2

This embodiment is substantially the same as embodiment 1 except that in this embodiment, each of the buffer ribs 2 is formed by connecting two elastic material threads via end portions to form an integral structure.

The end connection is a fastening connection, one end of the end connection is provided with a closed ring buckle structure 7, the end connected with the end connection is provided with an open ring buckle structure 8, the open ring buckle structure 8 is inserted into the closed ring buckle structure 7 along the opening during connection, the opening is compressed and reduced to avoid falling off from the opening, and the end connection can be welding, bonding or sleeving.

The end connection is the middle part of the slender S-shaped buffering rib 2, namely, each connected section is of a C-shaped structure.

The combined buffer rib formed by connecting the ring fasteners can meet the enough radial supporting force of the support and can provide buffer for the expansion and contraction of the support, the gap between the ring fastener structures arranged at the joint of the end ends of the combined buffer rib can meet the initial adjustment of the support to a greater extent, the support is adjusted more smoothly through the expansion inertia, the jamming or locking is avoided, and the operation is more convenient and effective.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides an adjustable support with latch closure structure, is including the support body that has the cavity to and set up the elasticity buffering muscle on the support body, the support body is formed by single metal silk material or many composite metal silk material spiral coiling, perhaps is formed by elastic polymer material 3D printing, and has two kinds of configurations of axial compression and expansion, its characterized in that: the buffer rib is long and thin S-shaped, is fixed on the surface or the internal surface of support body through spot welding or the mode that bonds, when carrying out axial compression or expansion to the support, the buffer rib is corresponding compresses or expands thereupon, the buffer rib is two and sets up along support center axis symmetry, and the one end of every buffer rib is attached at the first end of support body, and the other end is attached at the second end of support body, the first end of support body and the second end are arranged closely than the interlude, arrange the range upon range of end that forms for the silk material through closely winding 2.5 rings, the buffer rib of long and thin S-shaped has support and cushioning effect.

2. The adjustable stent with a buckle structure as claimed in claim 1, wherein the stent body is made of a biocompatible material but has no shape memory property.

3. The adjustable stent with the buckle structure according to claim 2, wherein the stent body can be completely or partially covered with a membrane or not covered with a membrane.

4. The adjustable stent with the buckle structure according to claim 2, wherein the stent body is not covered with a membrane and is a bare stent.

5. The adjustable bracket with the buckle structure as claimed in any one of claims 1 to 4, wherein the buffer rib is fixedly connected with each spiral section of the bracket body; or every two spiral sections are connected, and the spiral section which is not connected with the buffering rib is tightly attached to the buffering rib.

6. An adjustable stent with a loop fastener structure according to any one of claims 1 to 4, wherein the wires closely spaced at the first and second ends are quenched or otherwise treated to have a higher stiffness and a lower elasticity than the central section, and wherein the wires at the junctions of the overlapping ends have a second loop fastener structure for connection to a delivery system.

7. The adjustable stent with a loop fastener structure according to any one of claims 1 to 4, wherein each buffer rib is connected to the first end or the second end of the stent body by welding or bonding and is connected to the innermost turns of the closely arranged wires at the first end or the second end, and the innermost turns are located at the opposite side of the second loop fastener structure.