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An iliac vein and proximal technology, applied in the field of medical devices, can solve problems such as inappropriateness and poor iliac vein compression treatment effect, and achieve the effects of reducing the influence of blood flow, reducing the risk of thrombosis, and reducing treatment costs.
Pending Publication Date: 2020-07-03
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In addition, the adhesion of the venous intima is elastic, and the balloon can be stretched when it is expanded, but it will return to its original shape after expansion. Simple balloon expansion is not effective for the treatment of iliac vein compression.
In summary, fully absorbed or degraded stents are not suitable for iliac vein application
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Embodiment 1
[0025] An iliac vein stent includes a proximal part, a middle part and a distal part connected in sequence, the proximal part and the distal part are degradable stents, and the middle part is a permanent stent.
[0026] The material of the permanent stent is nickel-titanium alloy. For example, the existing permanent stent approved for application in the iliac vein is the Ziver stent of Cook Company.
[0027] The degradable bracket is made of absorbable magnesium-based alloy. The proximal, middle and distal sections are joined by laser.
[0028] There are 4-6 developing places at the junction of the middle part, the proximal part and the distal part, and the developing places are tungsten developing points.
[0029] The length of the proximal portion is 18 mm, the length of the middle portion is 20 mm, and the length of the distal portion is 35 mm.
[0030] The rhomboid mesh support structure of the iliac vein stent.
Embodiment 2
[0032] An iliac vein stent includes a proximal part, a middle part and a distal part connected in sequence, the proximal part and the distal part are degradable stents, and the middle part is a permanent stent.
[0033] The material of the permanent support is platinum-chromium alloy.
[0034] The degradable scaffold is a polymer absorbable material. The proximal, intermediate and distal sections are connected by braiding.
[0035] There are 4-6 developing places at the junction of the middle part, the proximal part and the distal part, and the developing places are tungsten developing points.
[0036] The length of the proximal portion is 19 mm, the length of the middle portion is 21 mm, and the length of the distal portion is 40 mm.
[0037] The iliac vein stent has a rhombic mesh structure.
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Abstract
The invention relates to the technical field of medical apparatuses, in particular to an iliac vein stent. The iliac vein stent comprises a proximal end part, an intermediate part and a distal end part, which are sequentially connected, wherein the proximal end part and the distal end part are degradable stents, and the intermediate part is a permanent stent. According to the iliac vein stent disclosed by the invention, the proximal end part and the distal end part are the degradable stents and can be completely absorbed or degraded within 6 weeks, and residues are not generated; after the distal end part is absorbed, intrinsic elasticity and bending of blood vessels can be recovered; besides, after the proximal end part in inferior caval veins is absorbed, influence on blood flow of the inferior caval veins and contralateral iliac veins is reduced; the intermediate part is the permanent stent, an intima can spread to cover the intermediate part, so that the shorter the stent is, the shorter the time allowing intima to completely cover the stent is, and the intermediate part of the stent can be stably entrapped under the intima without shifting or coming off; and besides, the intima is smooth, so that the risk of forming thrombosis can be reduced, and the treatment time for resisting coagulation and platelets is correspondingly shortened to 6 weeks.
Description
technical field [0001] The invention relates to the technical field of medical devices, in particular to an iliac vein stent. Background technique [0002] Anatomically, the right iliac artery crosses the left iliac vein, resulting in compression of the left iliac vein. Coupled with the pulsation and impingement of the iliac artery, the intima of the iliac vein adheres, affecting hemodynamics, and iliac vein compression syndrome occurs clinically. Patients will develop lower limb swelling, varicose veins, deep vein thrombosis, venous stasis ulcers, and even venous gangrene, which seriously affect the quality of life of patients. [0003] The iliac vein stent is one of the effective methods for the treatment of iliac vein compression syndrome. Through stent placement, the diameter of the iliac vein can be restored and the hemodynamics can be improved. The diameter of the iliac vein is relatively large, generally 12-18mm. The diameter of the stent needs to match the diameter...
Claims
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