CN211156501U - Blood vessel implantation stent - Google Patents
Blood vessel implantation stent Download PDFInfo
- Publication number
- CN211156501U CN211156501U CN201921795824.7U CN201921795824U CN211156501U CN 211156501 U CN211156501 U CN 211156501U CN 201921795824 U CN201921795824 U CN 201921795824U CN 211156501 U CN211156501 U CN 211156501U
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- stent
- blood vessel
- section
- implantation
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- 210000004204 blood vessel Anatomy 0.000 title claims abstract description 54
- 238000002513 implantation Methods 0.000 title claims abstract description 42
- 238000009941 weaving Methods 0.000 claims abstract description 13
- 230000002792 vascular Effects 0.000 claims description 38
- 239000007943 implant Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 14
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000003902 lesion Effects 0.000 description 12
- 210000003111 iliac vein Anatomy 0.000 description 8
- 230000001575 pathological effect Effects 0.000 description 4
- 206010040007 Sense of oppression Diseases 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 210000004394 hip joint Anatomy 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 206010051055 Deep vein thrombosis Diseases 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 206010070995 Vascular compression Diseases 0.000 description 1
- 206010047249 Venous thrombosis Diseases 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 210000003090 iliac artery Anatomy 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 210000005077 saccule Anatomy 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002966 stenotic effect Effects 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000001732 thrombotic effect Effects 0.000 description 1
- 208000019553 vascular disease Diseases 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 201000002282 venous insufficiency Diseases 0.000 description 1
Images
Abstract
The utility model provides a pair of blood vessel implantation support, blood vessel implantation support is woven by the silk material and is formed, follows the axial of blood vessel implantation support, the blood vessel implantation support is woven into the different district's section of radial holding power, and the tip of blood vessel implantation support is continuous. The utility model discloses its section of formation radial support power difference through weaving to this demand that adapts to the different positions of blood vessel, and tip boundary is continuous, and this avoids the silk material to form most advanced and damage blood vessel at the tip of blood vessel implantation support.
Description
Technical Field
The utility model relates to an interventional therapy apparatus, in particular to a blood vessel implanting bracket.
Background
The blood vessel implanting stent is characterized in that on the basis of the expansion and the forming of a lumen saccule, the stent is placed in a lesion section to achieve the purposes of supporting a blood vessel at a stenotic occlusion section, reducing the elastic retraction and the reshaping of the blood vessel and keeping the blood flow of a lumen unobstructed. Since the first coronary stent operation was successfully carried out by Sigwart et al in the united states by implanting a self-expanding metal bare stent into a patient in 1987, the minimally invasive intracavity treatment technology has made a great progress, and the vascular implanted stent has been widely used in the treatment of systemic vascular diseases at present.
Diseased vessels at different parts have special pathological structure characteristics, but most of the current stent designs follow the design of arterial stents, and the application has certain limitations. For example, while stent implantation is currently widely used for the treatment of symptomatic venous reflux disorder, the stents used are mostly large-caliber arterial stents. The pathological difference exists between the venous lesion and the arterial lesion, the design of the arterial stent can not meet the requirement of a vein lesion blood vessel, and adverse events such as stent displacement, fracture, secondary thrombus in the stent and the like occur frequently. It is necessary to design a stent which is adaptive to the pathological structure characteristics of a diseased blood vessel.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a stent for vascular implantation, which is used to solve the problem that the prior stent for vascular implantation is difficult to be applied to the intervention of venous lesion.
To achieve the above and other related objects, the present invention provides a stent for vascular implantation formed by weaving wire materials, along an axial direction of the stent for vascular implantation, the stent for vascular implantation is woven into sections having different radial support forces, and an end portion of the stent for vascular implantation is continuous.
Preferably, in the vascular implant stent, the sections with large radial supporting force and the sections with small radial supporting force are alternately arranged.
Preferably, the outer diameter of the stent for vascular implantation is gradually reduced from one end to the other end in the axial direction of the stent for vascular implantation.
Preferably, the vascular implant stent is cylindrical.
Preferably, the wires form a plurality of continuous arcs at the end of the stent, all of the continuous arcs constituting the end boundary of the stent.
Preferably, the stent graft is divided into two sections along the axial direction, wherein one section is a supporting section, and the other section is a positioning section, wherein the supporting section is woven into sections with different radial supporting forces.
As mentioned above, the blood vessel implanting bracket of the utility model has the following beneficial effects: the sections with different radial supporting forces are formed by weaving, so that the supporting to the blood vessel wall can be ensured on the premise of saving cost, and the end part boundary is continuous, so that the wire material is prevented from forming a tip at the end part of the blood vessel implantation stent to damage the blood vessel.
Drawings
Fig. 1 is a schematic view of an embodiment of a stent for vascular implantation according to the present invention.
Fig. 2 is a schematic view of a stent for vascular implantation according to an embodiment of the present invention.
Fig. 3 is a schematic view showing a stent implanted in a blood vessel according to an embodiment of the present invention.
Fig. 4 is a four-schematic view of an embodiment of the stent for vascular implantation according to the present invention.
Description of the element reference numerals
1 location section
11 end boundary of positioning section
12 petal
2 support section
21 weak supporting section
22 strong supporting section
23 continuous arc
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1 to 4, the present invention provides a stent for vascular implantation formed by weaving wire materials, wherein the stent for vascular implantation is woven into sections having different radial supporting forces in the axial direction of the stent for vascular implantation, the section having a large radial supporting force is referred to as a strong supporting section 22, the section having a small radial supporting force is referred to as a weak supporting section 21, and the end of the stent for vascular implantation is continuous. The utility model discloses its section of formation radial support power difference through weaving to this demand that adapts to the different positions of blood vessel, and tip boundary is continuous, and this avoids the silk material to form most advanced and damage blood vessel at the tip of blood vessel implantation support.
Generally, for the convenience of positioning, the stent for vascular implantation is divided into two sections in the axial direction, as shown in fig. 2 and 3, one section is a supporting section 2, i.e., a main body portion of the stent for vascular implantation, which is woven to have different radial supporting force, the other section is a positioning section 1, the positioning section 1 has a positioning portion having an outer diameter larger than that of the supporting section 2, and the wires are continuous at the end boundary of the positioning section 1. The stent for implanting blood vessel of the embodiment is provided with a positioning section 1 which has a positioning part with larger outer diameter and is convenient for positioning during releasing, and the end boundary 11 of the positioning section 1 is continuous, namely, no exposed wire end exists, thus avoiding damaging the blood vessel
Support section
In the embodiment shown in fig. 1, the stent is divided into at least two sections along the axial direction of the vascular implant according to the magnitude of the radial supporting force, such as a tightly woven strong supporting section 22 and a loosely woven weak supporting section 21.
For example, for non-thrombotic iliac vein compression syndrome, as shown in fig. 2, the vascular implant stent comprises a positioning section 1, a strong support section 22 and a weak support section 21 in sequence along the axial direction, wherein the length of the strong support section 22 is 10-50 mm to resist clamping compression of iliac artery and lumbar vertebra to iliac vein, and the length of the weak support section 21 is 30-90 mm.
As shown in fig. 1, in the present embodiment,
the sections with small radial supporting force are alternately arranged, namely, a plurality of sections of strong supporting sections 22 and weak supporting sections 21 are arranged, and the strong supporting sections 22 and the weak supporting sections 21 are alternately distributed. It can also be distributed in various ways, and the radial supporting force of different strong/weak supporting sections is different.
For example, for PTS, the stent graft is axially sequentially a positioning section, a first strong support section, a weak support section, and a second strong support section. The radial support strength of the strong support section is greater than that of the weak support section, and the strength of the first strong support area is greater than that of the second strong support area.
Generally, a stent for vascular implantation has a cylindrical shape with a constant outer diameter, and it may also have a variable outer diameter, such as a tapered shape. As shown in fig. 3, as an embodiment of the support section, in the present embodiment, along the axial direction of the stent for vascular implantation, the outer diameter of the support section 2 gradually decreases or increases near the positioning section 1, that is, the support section 2 of the present embodiment is tapered.
Preferably, as shown in fig. 1 and 3, the end of the stent is continuous, and in this embodiment, the wires form a plurality of continuous arcs 23 at the end of the support section 2, and all the continuous arcs 23 form the end boundary of the support section 2. When the weaving is carried out through the wire materials, the continuous arc 23 is formed by weaving at the beginning of weaving, so that the end boundary of the support section 2 is in a closed shape instead of the tip of the wire materials, and the smooth end shape of the blood vessel implanting stent is enhanced by the arrangement of the continuous arc 23, and further the damage to the blood vessel is avoided.
Positioning section
As shown in FIGS. 2 and 3, the wire in this embodiment forms a plurality of consecutive arcs at the end of the positioning section 1, all constituting the end boundary 11 of the positioning section. When the wire is used for weaving, a continuous arc is formed by weaving when the weaving is finished, so that the end boundary of the positioning section is in a closed shape instead of a tip shape formed by cutting the wire, and the smooth end shape of the blood vessel implanting stent is enhanced by the arrangement of the continuous arc, so that the blood vessel is further prevented from being damaged.
As shown in fig. 2 and fig. 3, as an embodiment of the positioning section 1, in this embodiment, the positioning section 1 is a flared section formed by continuously weaving wires at the end of the supporting section 2 and having an increasing outer diameter along the axial direction of the stent graft, and the flared section forms an included angle with the axis of the stent graft, and the included angle is 10 ° to 90 °. The positioning section 1 in the embodiment is flared, that is, a wire material is continuously woven along the axial direction of the vascular implantation stent to form a horn-shaped structure, which facilitates the positioning during release. The end boundary 11 of the positioning section is continuous and free of tips, avoiding damage to the vessel. The embodiment is beneficial to realizing accurate positioning of the stent at the bifurcation of the blood vessel (such as the iliac vein outflow opening), and reduces the influence of the implanted stent on the blood flow at the opposite side after the stent is implanted, wherein the stent excessively extends into the upper confluent blood vessel.
As shown in figure 4, as a second embodiment of the positioning section 1, the positioning section 1 in this embodiment is composed of a plurality of petals 12 circumferentially and uniformly distributed around the axis of the vascular implant stent, and the petals 12 are woven by the silk material. The petals 12 are conveniently positioned when released. In the direction from the supporting section 2 to the positioning section 1, the peripheral surface formed by all the petals 12 forms an included angle with the axis of the vascular implant stent, namely an included angle a in the figure, and the included angle a is 10-90 degrees. The number of petals can be 3-30.
In the above embodiments, the length of the positioning section 1 in the axial direction of the stent for implantation in a blood vessel is in the range of: one third of the outer diameter of the support section to three times the outer diameter of the support section, typically 5-50 mm; namely, the length of the petals 12 along the axial direction of the blood vessel implanting bracket is 5-50 mm.
The shape of the positioning section 1 is not limited thereto, it only needs to have a positioning portion with an outer diameter larger than that of the support section 2, it may also be waist drum-shaped, and it is woven from the wire material woven to form the support section 2.
The positioning section 1 and the supporting section 2 can be organically combined according to needs to form vascular implantation stents with different shapes and structures. The embodiment can better adapt to the physiological structure characteristics of the diseased blood vessel by adjusting the strength of radial force of different axial sections, the structural design of the positioning section and the overall cylindrical or conical design of the blood vessel implanting bracket. Is especially suitable for the iliac vein lesion.
The iliac vein support that is in the present market a few, its design and artery support are not poor, all are radial force axial evenly distributed support, but to iliac vein oppression syndrome, its oppression punishment department needs to have the holding power that excels in to resist the oppression, thereby maintain the unblocked nature of blood vessel, and the normal blood vessel behind the excessive pressure punishment point, because need not overcome the pulsation unlike the artery support, the holding power of its needs only need be enough to prevent that the support from taking place to shift can, if support intensity too high can lead to breathing cycle in-process, the blood vessel is implanted the support and is too big to the vascular effort and make the patient produce the discomfort.
For the sequelae of deep venous thrombosis (PTS) of lower limbs, lesions are usually long, the blood vessel implanted stent needs to cross hip joints, the lesion part needs high radial strength, and the blood vessel implanted stent at the hip joints needs to have high flexibility. The vascular implantation stent with the axially and uniformly distributed radial force can hardly meet the different requirements of different vascular parts on strength and flexibility at the same time. The support section 2 of the present embodiment has different radial support forces along the axial direction, which can be realized by the density of the weave or by the selection of the material, so as to adapt to the pathological characteristics well.
The material used for the wire in this embodiment may be a metal alloy, such as common nitinol, cobalt-chromium alloy, 316L stainless steel, magnesium alloy, etc., or may be various high molecular polymers, not limited to the above listed materials.
Meanwhile, in order to adapt to the anatomical morphology characteristics of the iliac vein opening, the proximal end of the blood vessel implanting stent of the embodiment is designed with a horn mouth or corolla-shaped positioning structure, namely the positioning section 1, which is more beneficial to positioning the blood vessel implanting stent.
All lesion features are similar to those of the blood vessel of the iliac vein lesion, and the design can be applied to the lesion blood vessel with high adaptation, so that the lesion blood vessel has high stability.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A blood vessel implantation stent is characterized in that the blood vessel implantation stent is formed by weaving wires, the blood vessel implantation stent is woven into sections with different radial supporting force along the axial direction of the blood vessel implantation stent, and the end part of the blood vessel implantation stent is in a continuous shape.
2. The vascular implant stent of claim 1, wherein: in the blood vessel implanting bracket, sections with large radial supporting force and sections with small radial supporting force are alternately arranged.
3. The vascular implant stent of claim 1, wherein: the outer diameter of the blood vessel implantation stent is gradually reduced from one end to the other end along the axial direction of the blood vessel implantation stent.
4. The vascular implant stent of claim 1, wherein: the vascular implantation stent is cylindrical.
5. The vascular implant stent of claim 1, wherein: the wire forms a plurality of continuous arcs at the end of the stent, all of the continuous arcs forming the end boundary of the stent.
6. The vascular implant stent of claim 1, wherein: the vascular implant stent is divided into two sections along the axial direction, wherein one section is a supporting section, and the other section is a positioning section, wherein the supporting section is woven into sections with different radial supporting forces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921795824.7U CN211156501U (en) | 2019-10-24 | 2019-10-24 | Blood vessel implantation stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921795824.7U CN211156501U (en) | 2019-10-24 | 2019-10-24 | Blood vessel implantation stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211156501U true CN211156501U (en) | 2020-08-04 |
Family
ID=71817088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921795824.7U Active CN211156501U (en) | 2019-10-24 | 2019-10-24 | Blood vessel implantation stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211156501U (en) |
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2019
- 2019-10-24 CN CN201921795824.7U patent/CN211156501U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240318 Address after: Building 10, No. 23 Huashan Middle Road, Xinbei District, Changzhou City, Jiangsu Province, 213002 Patentee after: LEO MEDICAL CO.,LTD. Country or region after: China Address before: Room 108, Building 2, No. 103 Cailun Road, China (Shanghai) Pilot Free Trade Zone, Pudong New Area, Shanghai Patentee before: SHANGHAI WEIYU MEDICAL TECHNOLOGY CO.,LTD. Country or region before: China |