CN101507666A

CN101507666A - Automatic flicking tubular blood vessel support after being pushed out from sleeve

Info

Publication number: CN101507666A
Application number: CNA2008100743371A
Authority: CN
Inventors: 陈启星
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-02-11
Filing date: 2008-02-11
Publication date: 2009-08-19

Abstract

The invention relates to a tubular vascular scaffold capable of automatically flicking out of a sleeve, in particular to a solenoid shaped vascular scaffold formed by a spring wire. The spring wire 1 has elasticity, and is prefabricated into a solenoid shaped spring, namely, the spring wire is the solenoid shaped spring in the state of no external force; the sleeve (spring sleeve 2) of the spring wire also has elasticity and has equal elasticity and opposite direction to the spring wire, so 'a sleeve spring wire' combined by the spring wire and the sleeve is straight after the spring wire is sleeved into the spring sleeve; and when the head of the sleeve spring wire reaches a part of a vein to be treated, the spring wire is pushed out of the sleeve and forms the solenoid shaped spring again under the correction of an adjusting tool to become the solenoid shaped vascular scaffold 6.

Description

Go out automatically rebounding open tubular blood vessel support behind the sleeve pipe

Technical field:

The invention belongs to medical instruments field, is a kind of intravascular stent.

Background technology:

Present intravascular stent all is basketball netted (is called for short net cribbing), is shrunk to the very little state of diameter earlier, delivers to strut behind the position to be treated of blood vessel to reticulate pipeline, in order to support and the expansion blood vessel again.This net cribbing complex structure, specification requirement be very meticulous, cost an arm and a leg, and be difficult to do to such an extent that diameter is very little.

Summary of the invention:

The present invention be with sleeve pipe entangle a flexibility easily curved can automatically rebounding open " support source ", it is sent in the blood vessel, reach the position to be treated of blood vessel when this support source after, automatically spring open after from sleeve pipe, releasing, form intravascular stent.There are two classes in the support source, and a class is the tubular intravascular stent of helical that an elastic yarn forms, and another kind of is the expansion tube intravascular stent that can expand and produce elastic force behind the chance water.

The tubular intravascular stent of helical that elastic yarn forms.This elastic yarn 1 has elasticity, it is prefabricated into a helical tubular spring, that is to say, this elastic yarn is a helical tubular spring under no external force state, the sleeve pipe that is used for it also has elasticity (claiming pogo barrel 2), elastic force opposite sign but equal magnitude with elastic yarn, after so this elastic yarn is inserted in pogo barrel, both synthetic " sleeve pipe elastic yarn " is straight, when the head of this sleeve pipe elastic yarn arrived the position to be treated of blood vessel, elastic yarn was pushed out outside the sleeve pipe, under the correction of the instrument of adjustment, elastic yarn has formed the helical tubular spring again, becomes the tubular intravascular stent 6 of helical.

The expansion tube intravascular stent.Some organic materials is met and can be expanded and produce elastic force (such as hydro-expansive rubber, plastics) behind water, makes the water-swellable blood vessel (abbreviation expansion tube) of finalizing the design with this material.The expansion tube wall is the very thin very soft film of one deck before water-swellable, claim the expansion periosteum, expansion periosteum 8 after the folding compression is filled in sealing in the flexible small casing 7, when this flexible expansion periosteum arrives the position to be treated of blood vessel, be pushed out outside the small casing, after moisture in the blood contacts, this flexible membrane has become elastic force and thicker slightly tube wall, (under the help of expander) struts this expansion tube, and having become has the elastic force pipeline, becomes expansion tube intravascular stent 9.

Description of drawings:

The tubular intravascular stent sketch map of helical that Fig. 1-elastic yarn forms.1-elastic yarn; 2-pogo barrel; 3-circular sleeve; 4-locator card; 5-overlap joint mouth; The tubular intravascular stent of 6-helical;

Fig. 2-expansion tube blood vessel.7-flexible small casing; Expansion periosteum after the 8-folding compression; 9-expansion tube intravascular stent.

The specific embodiment:

Embodiment 1: the tubular intravascular stent of helical that elastic yarn forms.This elastic yarn 1 is a flat tinsel of rubber-like, resemble a very long lasagne, be prefabricated into a helical tubular spring earlier, that is to say, the flat tinsel of this elasticity is a helical tubular spring under no external force state, the sleeve pipe that is used for it also has elasticity (claiming pogo barrel 2), with elastic force opposite sign but equal magnitude wiry, so after this tinsel was inserted in pogo barrel, both synthetic " sleeve pipe tinsel " was straight, when this sleeve pipe head wiry arrives the position to be treated of blood vessel, tinsel is pushed out outside the sleeve pipe, under the correction of the instrument of adjustment, tinsel has formed the helical tubular spring again, becomes the tubular intravascular stent 6 of helical.A locator card 4 is arranged, the diameter of stationary solenoids between the solenoidal two adjacent rings.Because form in the process of helical tubular spring at the sleeve pipe tinsel, can produce rotation between helical tubular spring and the sleeve pipe tinsel, should not allow spring rotate, so have to allow the sleeve pipe tinsel rotate, in order not allow the sleeve pipe rotation wiry blood vessel wall of dawdling, so add circular sleeve 3 of cover in sleeve pipe tinsel outside again, allow the sleeve pipe tinsel in circular sleeve, rotate.In order to reduce rotation, resemble the Flos Cannabis formula of twisting in advance, according to the solenoid number of turns, rectangular sleeve pipe tinsel is twisted into the Flos Cannabis of the corresponding number of turns, like this, when forming the helical tubular spring, can realize reducing the target of number of revolutions.

Embodiment 2: for the patient of needs expansion blood vessel, only need that bigger just passable with the blood vessel diameter support with the tubular intravascular stent of helical, but for the hemangioma patient, be to insert in the hemangioma with an artificial blood vessel, allow blood not oppress hemangioma, what adopt at present is film covering type support (this is actually an artificial blood vessel).This situation is actually and requires to form a pipeline that does not leak, so will on the basis of embodiment 1, improve, scheme one is an overlap joint (form overlap joint mouthful 5) mutually between two circles that solenoid is adjacent, prevents to leak, and connects the scroll flexible pipe of shower nozzle in the bathroom.Scheme two is to paste a skim at the tubular intravascular stent inwall of helical.

Embodiment 3: the expansion tube intravascular stent.Some organic materials is met and can be expanded and produce elastic force (such as hydro-expansive rubber, plastics) behind water, makes the water-swellable blood vessel (abbreviation expansion tube) of finalizing the design with this material.The expansion tube wall is the very thin very soft film of one deck before water-swellable, claim the expansion periosteum, expansion periosteum 8 after the folding compression is filled in sealing in the flexible small casing 7, when this flexible expansion periosteum arrives the position to be treated of blood vessel, be pushed out outside the small casing, after moisture in the blood contacts, this flexible membrane has become elastic force and thicker slightly tube wall, (under the help of expander) struts this expansion tube, and having become has the elastic force pipeline, becomes expansion tube intravascular stent 9.

Claims

1, a kind ofly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, it is characterized in that: entangle the easily curved support source of a flexibility with sleeve pipe, it sent in the blood vessel, reach the position to be treated of blood vessel when this support source after, from sleeve pipe, release, form intravascular stent.

2, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: the tubular intravascular stent of helical that adopts an elastic yarn to form, this elastic yarn 1 has elasticity, be prefabricated into a helical tubular spring earlier, that is to say, this elastic yarn is a helical tubular spring under no external force state, the sleeve pipe that is used for it also has elasticity (claiming pogo barrel 2), elastic force opposite sign but equal magnitude with elastic yarn, after so this elastic yarn is inserted in pogo barrel, both synthetic " sleeve pipe elastic yarn " is straight, when the head of this sleeve pipe elastic yarn arrived the position to be treated of blood vessel, elastic yarn was pushed out outside the sleeve pipe, under the correction of the instrument of adjustment, elastic yarn has formed the helical tubular spring again, becomes the tubular intravascular stent 6 of helical.

3, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: elastic yarn 1 is a flat tinsel of rubber-like, resembles a very long lasagne.

4, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: a locator card 4 is arranged, the diameter of stationary solenoids between the solenoidal two adjacent rings.

5, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: add circular sleeve 3 of cover in sleeve pipe tinsel outside, allow the sleeve pipe tinsel rotate in circular sleeve.

6, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: overlap joint (form overlap joint mouthful 5) mutually between two circles that solenoid is adjacent, and to avoid leak blood.

7, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: paste a skim at the tubular intravascular stent inwall of helical, to avoid leak blood.

8, according to claim 1ly go out automatically rebounding open tubular blood vessel support behind the sleeve pipe, its further feature is: adopt the expansion tube intravascular stent, make expansion tube with the material that can expand and produce elastic force behind the chance water, the expansion tube wall is the very thin very soft film of one deck before water-swellable, claim the expansion periosteum, expansion periosteum 8 after the folding compression is filled in sealing in the flexible small casing 7, when this flexible expansion periosteum arrives the position to be treated of blood vessel, be pushed out outside the small casing, after moisture in the blood contacts, this flexible membrane has become elastic force and thicker slightly tube wall, (under the help of expander) struts this expansion tube, having become has the elastic force pipeline, becomes expansion tube intravascular stent 9.