CN201135516Y

CN201135516Y - Variable diameter blood vessel support

Info

Publication number: CN201135516Y
Application number: CNU2007201907670U
Authority: CN
Inventors: 张正才; 贾登强; 王建平; 姜立红; 蒲忠杰
Original assignee: Lepu Medical Technology Beijing Co Ltd
Current assignee: Lepu Medical Technology Beijing Co Ltd
Priority date: 2007-12-13
Filing date: 2007-12-13
Publication date: 2008-10-22
Anticipated expiration: 2017-12-13

Abstract

The utility model relates to a variable diameter blood vessel bracket. The bracket adopts the material which is compatible with human body; a reticular and tubular structure is formed by a connecting reticula ring unit and a connection unit, the axial diameter of the main body after expansion is provided with at least one variable diameter along the length direction, the changing of the human body blood vessel along the length direction can be matched better, the matching ability of the blood vessel bracket and human body blood vessel is improved, the consistent expansion ratio of the bracket and the blood vessel is provided in the intervention operation in order to improve the attaching performance of the blood vessel bracket with the human body blood vessel and reduce the harm to human body; more uniform blood vessel covering is provided, and more uniform radial supporting force is remained to the blood vessel wall; the local part or whole appearance after the expansion of the main body is a tapering cylinder shaped in order to be ensured to be provided with good penetration performance, the difficulty of operation is decreased so that the operation is ensued to be safer. Identical or similar radial compressive strength is provided in different length units after the expansion of the main body, and the variable diameter blood vessel bracket is suitable to be used to treat a plurality of diseases caused by narrowness and blockage of the cavity of the blood vessel.

Description

The reducing intravascular stent

Technical field

This utility model belongs to medical instruments field, relates to a kind of reducing intravascular stent that vessel lumen is narrow, block caused various disease conditions that is used for the treatment of.

Background technology

According to The World Health Organization's statistics, global annual cardiovascular and cerebrovascular disease causes death and reaches 1,670 ten thousand people, has accounted for 30% of all disease death numbers, and cardiovascular and cerebrovascular disease has become " first killer " who jeopardizes the human life.Coronary heart disease, apoplexy are the principal diseases that threatens human health in the cardiovascular and cerebrovascular disease, and in recent years, along with the raising of people's living standard, this class disease incidence rate presents the trend that rises year by year.Coronary heart disease, apoplexy disease is narrow by vessel lumen, block institute causes, and the intravascular stent implantation is exactly a kind of interventional therapy method at this symptom, and it is little to have wound, and complication is few, easily remarkable advantage such as recoverys grade.

Consult Fig. 1, shown in Figure 2, intravascular stent in the market has multiple version, its main purpose all is for the radial support power of improving support, strengthens development effect and radially or axial performance such as cripetura rate, the common feature of this quasi-tradition intravascular stent is: 1. intravascular stent all is cylindric, and expansion after-poppet diameter is constant along its length; Intravascular stent along its length each repetitive have identical net ring density; 3. the diameter of intravascular stent twine does not change along its length.Because the internal diameter of human vas is constantly to change along its length, even alter a great deal, such as left anterior descending branch coronarius, adopt traditional not intravascular stent of reducing to remove to expand obstructive position, can cause the divergence ratio difference of the intravascular stent of different parts and blood vessel very big, be difficult to guarantee consistent, and the radial support power that produces owing to intravascular stent far-end transition expansion is inconsistent, the adherent performance of intravascular stent is fallen flat, cause unnecessary complication, even cause damage, thereby influence the therapeutic effect of cardiovascular and cerebrovascular disease to human vas.

Summary of the invention

The purpose of this utility model is to provide a kind of reducing intravascular stent, can better adapt to of the variation of human vas diameter at length direction, the adherent performance of intravascular stent and human vas is improved, reduce the damage of intravascular stent, improve therapeutic effect human vas.

The technical solution adopted in the utility model: a kind of reducing intravascular stent, its body material is the metal or alloy compatible with human body, net ring element and linkage unit by disjunctor constitute webmaster shape structure, and the axial diameter after described volume expansion has the diameter of at least a variation along its length.

Profile after described volume expansion integral body along its length is gradually thin taper.

Axial diameter after described volume expansion has the diameter of more than one variations along its length, and the profile after promptly body 1 expands part along its length is gradually thin taper.

The net ring density of the near-end net ring element of described body and far-end net ring element is inequality, and promptly near-end net ring element number is more than far-end net ring element number.

Described net ring element and linkage unit are identical or different structure, and promptly the net ring element is corrugated, and Connection Element is corrugated or linearity, and ripple is sine, cosine, S type, V-type, trapezoidal or triangle, or in the conic section any.

Described net ring element and Connection Element material are rustless steel, cobalt-base alloys, magnesium alloy or marmem.

The utlity model has following actively useful effect:

1. diameter can change along its length after the reducing intravascular stent expanded, can better meet the objective reality that the human vas diameter changes along its length, improve the matching of intravascular stent and human vas, for the intervene operation process provides the identical or close support divergence ratio consistent with blood vessel, thereby the adherent performance of intravascular stent and human vas is improved, with human vas fit tightr, reduce traditional intravascular stent to greatest extent since inconsistent support-tremulous pulse than cause to the human injury;

2. the diameter of reducing intravascular stent twine is not wide twine along its length, after inserting human body, can provide more uniform blood vessel to cover, make intravascular stent keep more uniform radial support power to blood vessel wall, solved conventional stent owing to the inconsistent problem of radial support power that far-end transition expansion produces, made intravascular stent near-end and far-end have similar radial support power;

3. reducing intravascular stent expansion part, back or monnolithic case are gradually thin tubular, make it by blood vessel the time, have good penetration performance, can reduce the difficulty that the doctor operates conveying or process of expansion, and the minimizing complication makes operation safer;

4. the reducing intravascular stent has identical or close radial crushing strength in different long measures after expanding, and is applicable to that the treatment vessel lumen is narrow, blocks caused various disease conditions.

Description of drawings

Fig. 1 is traditional intravascular stent structural representation;

Fig. 2 is the deployed configuration partial schematic diagram of Fig. 1;

Fig. 3 is this utility model embodiment 1 structural representation;

Fig. 4 is the deployed configuration partial schematic diagram of Fig. 3;

Fig. 5 is this utility model embodiment 2 structural representations;

Fig. 6 is the deployed configuration partial schematic diagram of Fig. 5.

The specific embodiment

Embodiment 1

Consult Fig. 3, shown in Figure 4, a kind of reducing intravascular stent, its body 1 is the webmaster shape structure that is made of the net ring element 101 of disjunctor and linkage unit 102, net ring element 101 can be selected the metal or alloy compatible with human body for use with Connection Element 102 materials, as rustless steel, cobalt-base alloys, magnesium alloy or marmem etc., employing is worked out, or adopts earlier establishment to adopt to be welded, also can to adopt metal circular tube to form by laser engraving again; Axial diameter after body 1 expands has the diameter of at least a variation along its length, and the profile after promptly body 1 expands integral body along its length is gradually thin taper; The near-end 103 net ring elements of body 1 and the net ring density of far-end 104 net ring elements are inequality, and promptly near-end 103 net ring element numbers are more than far-end 104 net ring element numbers.

Described net ring element 101 can be identical or different structure with linkage unit 102, promptly net ring element 101 is corrugated, Connection Element 102 can be corrugated, also can be linearly, but have identical or close radial crushing strength in different long measures after requiring body 1 to expand; Ripple can be sine, cosine, S type, V-type, trapezoidal or triangle etc., or in the conic section any.

Described net ring element 101 equates with Connection Element 102 mesh wire diameter radially, and mesh wire diameter vertically can equate, also can be unequal.

Embodiment 2

Consult Fig. 5, shown in Figure 6, the axial diameter after described body 1 expands has the diameter of more than one variations along its length, and the profile after promptly body 1 expands part 105 along its length is gradually thin taper.

This utility model is intended to protect whole along its length or more than one the part of the profile after body 1 expands to be gradually thin pyramidal structure, is not restricted to the described embodiments.

Claims

1. reducing intravascular stent, its body material is the metal or alloy compatible with human body, net ring element and linkage unit by disjunctor constitute webmaster shape structure, it is characterized in that the axial diameter after described body (1) expands has the diameter of at least a variation along its length.

2. reducing intravascular stent according to claim 1, it is characterized in that after described body (1) expands profile along its length integral body be gradually thin taper.

3. reducing intravascular stent according to claim 1 is characterized in that the axial diameter after described body (1) expands has the diameter of more than one variations along its length, and the profile after promptly body 1 expands local (105) along its length is gradually thin taper.

4. reducing intravascular stent according to claim 1, the net ring density that it is characterized in that near-end (103) the net ring element of described body (1) and far-end (104) net ring element is inequality, and promptly near-end (103) net ring element number is more than far-end (104) net ring element number.

5. reducing intravascular stent according to claim 1, it is characterized in that described net ring element (101) and linkage unit (102) are identical or different structure, promptly net ring element (101) is corrugated, Connection Element (102) is corrugated or linearity, ripple is sine, cosine, S type, V-type, trapezoidal or triangle, or in the conic section any.

6. reducing intravascular stent according to claim 1 is characterized in that described net ring element (101) and Connection Element (102) material are rustless steel, cobalt-base alloys, magnesium alloy or marmem.