CN105147350A - Self-adaptive plugging device - Google Patents

Abstract

The present invention provides an adaptive occluder, which is characterized in that it includes a first occlusion disc and a second occlusion disc for occluding the blood flow at the defect, and is characterized in that the first occlusion disc One end of the stretchable and deflectable connecting waist is connected, and the other end of the stretchable and deflectable connecting waist is connected with the second occlusion disk. The connecting waist of the self-adaptive occluder of the present invention can be stretched and deflected, and the length and deflection angle of the occluder can be adjusted by stretching and deflecting the connecting waist. Under the action of the adjustable waist, the occlusion discs on both sides can fit well with the walls of the aorta and ductus arteriosus respectively. Significantly improved the main properties of the occluder such as resilience, fixity, and occlusion effect.

Description

An adaptive occluder

technical field

The invention relates to an adaptive occluder for treating congenital heart disease.

Background technique

Congenital heart disease (congenital heart disease for short) refers to the anatomical abnormality caused by the formation disorder or abnormal development of the heart and great blood vessels during the embryonic development period, or the channel that should be automatically closed after birth is not closed (it is normal in the fetus) situation. Congenital heart disease is the most common type of congenital malformation, accounting for about 28% of various congenital malformations. The most common CHDs include atrial septal defect (ASD), ventricular septal defect (VSD), and patent ductus arteriosus (PDA). Every year, about 150,000 to 200,000 newborns in my country suffer from congenital heart disease. The traditional treatment method is surgical thoracotomy, using patch or stitches to repair the defect, but the surgical hand does a lot of damage to the body, there are certain surgical complications and scars, which will affect the patient's physical and mental health for a long time and adult quality of life.

The emergence of occluders for the treatment of congenital heart disease has greatly improved this situation. The occluder is a medical device used for the treatment of structural heart disease atrial septal defect (ASD), patent foramen ovale occluder (PFO), ventricular septal defect (VSD), patent ductus arteriosus (PDA) and other diseases . The occluder is generally braided by nickel-titanium alloy wire and has a double-disc structure. Using surgery to fix the occluder to the defect can block the blood flow, and as the endothelial tissue climbs over the surface of the occluder, the defect heals and completely blocks the blood flow. The waist matches the diameter of the defect, making it difficult for the occluder to displace and reduce the incidence of residual shunt. The double-disc structure, under the action of the memory and superelasticity of the nickel-titanium alloy wire, makes the occluder deformable with the heart Beat synergy to further reduce residual shunt. The occluder is operated by the delivery device (sheath, push cable, guide wire, etc.) into the heart through the blood vessel or puncture, and released at the lesion, which greatly reduces the surgical trauma and improves the safety and success rate of interventional therapy for congenital heart disease. significantly improved.

However, the current occluder technology still has many new requirements in clinical application, and there is still a lot of room for improvement in the main performance. These include: the resilience, fixity, and occlusion effect of the occluder for immediate occlusion. The resilience means that the general occluder is made of nickel-titanium memory alloy and has a double-disc structure with two left and right discs. Firstly, the occluder is pulled into a slender strip and pre-installed in the bridge tube. After being delivered to the defect inside the heart through the delivery sheath and released, the double disk surface is restored and clamped on the residual wall of the defect to play a blocking role. However, in the actual use of nickel-titanium alloy occluders, due to the sensitivity of the superelasticity and memory of the nickel-titanium alloy material to temperature, the resistance and strain generated during delivery, and the viscosity of blood flow, many clinical applications will The structure of the double-disc surface cannot be completely restored, and it becomes a gourd shape, etc., which not only greatly reduces the occlusion and hemostatic ability of the occluder, but also cannot clamp and fit the defective residual wall, thus forming a large number of residual shunts or causing occlusion Due to the risk of the occluder falling off, the occluder has to be recovered and replaced with a new one until the release is qualified. The fixity means that after the occluder is released, it can maintain the same position at the defect site for a long time without shifting or falling off. However, the double-disc occluder is only fixed by the double-disk surface, and it is difficult for residual walls with different structures. The shape and thickness of the uniform double-disc contour cannot be automatically adapted. In addition to the possible deformation and poor resilience of the occluder, the double-disk occluder has the risk of shifting or even falling off. The demeanor effect means that after the defect is blocked with an occluder, blood can be blocked. The presence or absence of residual shunt is one of the main indicators for evaluating the effect of occluder surgery in clinical practice. If there is no residual shunt after implantation of the occluder, it can be judged that the implantation is successful. However, because the double-disc occluder is parallel, for defects with unequal width or unevenness, it may be deformed to produce residual shunt.

Contents of the invention

The purpose of the present invention is to provide an occluder with an adjustable waist, so that the main properties of the occluder such as resilience, fixity, and occlusion effect are qualitatively improved. The occluder structure of the present invention can be applied to various occluders, including ASD, VSD, PDA occluders, occluders with flow-blocking membranes and occluders without flow-blocking membranes, etc.

In order to achieve the above object, the present invention provides an adaptive occluder, comprising a first occlusion disk and a second occlusion disk for occluding the blood flow at the defect, characterized in that the first occlusion The disk is connected to one end of the stretchable and deflectable connected waist, and the other end of the stretchable and deflectable connected waist is connected to the second occlusion disk.

Preferably, the stretchable and deflectable connecting waist includes a spherical braided mesh, one end of the spherical braided mesh is connected to the first occlusion disk, and the other end is connected to the second occlusion disk.

Preferably, the stretchable and deflectable connecting waist includes a collar, one end of the collar is connected to the first occlusion disk, and the other end is connected to the second occlusion disk.

Preferably, the stretchable and deflectable connecting waist includes a spring, one end of the spring is connected to the first occlusion disk, and the other end of the spring is connected to the second occlusion disk.

Preferably, the stretchable and deflectable connecting waist includes a slider-slider combination, one end of the slider-slider combination is connected to the first occlusion disk, and the other end is connected to the second occlusion disk.

More preferably, the slider slider assembly includes a central slide rail, an upper slider, a lower slider, an upper slider and a lower slider, and the upper slider and the lower slider are respectively arranged at the upper and lower ends of the central slide rail and Can slide independently along the center rail, the upper slider passes through the upper slider, the upper slider slides along the upper slider, the lower slider passes through the lower slider, the lower slider slides along the lower slider, the upper slider and the lower slider The rods are respectively arranged on the upper bracket and the lower bracket, and the upper bracket and the lower bracket are respectively connected with the upper blocking disk and the lower blocking disk.

Preferably, the stretchable and deflectable connecting waist comprises a columnar body braided by nickel-titanium alloy wires, the sidewall of the columnar body is formed with at least one protruding annular portion.

Preferably, the first occlusion disk includes a nickel-titanium alloy wire braided disk; or, the first occlusion disk includes at least two fixing arms, and the fixing arms are cut from a nickel-titanium alloy tube straight pipe or curved pipe; or, the first occlusion disk includes a helical skeleton.

More preferably, the inside or outside of the nickel-titanium alloy wire braided disc is sutured to fix at least one layer of high polymer flow blocking film, the surface of the fixed arm is sutured to fix the high polymer flow blocking film, and the helical wire skeleton The surface is sutured to fix the polymer flow blocking membrane.

Preferably, the second occlusion disk includes a hollow structure braided by nickel-titanium alloy wires; or, the first occlusion disk includes at least two fixing arms, and the fixing arms are made of nickel-titanium alloy A straight pipe or an arc-shaped bent pipe cut from a pipe; or, the first sealing disk includes a helical skeleton.

More preferably, the inside or outside of the nickel-titanium alloy wire braided disc is sutured to fix at least one layer of high polymer flow blocking film, the surface of the fixed arm is sutured to fix the high polymer flow blocking film, and the helical wire skeleton The surface is sutured to fix the polymer flow blocking membrane.

More preferably, the end of the fixed arm away from the waist is in a spherical structure.

Preferably, the first occlusion disk and the connecting waist are fixedly connected by a first fixing member, and the second occlusion disk and the connecting waist are fixedly connected by a second fixing member.

Preferably, the outer side of the first occlusion disk or the second occlusion disk is provided with a threaded steel sleeve for connecting with the delivery device of the occluder.

Preferably, the middle part of the first blocking disk or the second blocking disk is recessed, the threaded steel is sheathed on the outside of the first blocking disk or the second blocking disk, the first blocking disk or the second blocking disk The end faces of the two sealing discs and the threaded steel sleeve are located on the same plane.

Preferably, the cross-section of the first blocking disk or the second blocking disk is circular, and the longitudinal section is square, trapezoidal or elliptical.

Compared with prior art, the beneficial effect of the present invention is:

1. The connecting waist of the self-adaptive occluder of the present invention can be stretched and deflected. By stretching and deflecting the connecting waist, the length and deflection angle of the occluder can be adjusted. Generally, both the aorta and pulmonary artery exist With a certain included angle, under the action of the adjustable waist, the occlusion discs on both sides can fit well with the walls of the aorta and arterial duct respectively. Significantly improved the main properties of the occluder such as resilience, fixity, and occlusion effect;

2. The occlusion disk of the present invention can use a helical wire skeleton. The advantage of this design is that the ability to pass through the sheath tube with a single wire material is qualitatively improved compared with traditional occluders. At the same time, this helical wire skeleton can be applied to the upper and lower disks of the occluder respectively, and another disk is formed with traditional braiding; or the helical wire skeleton can be applied to both disks of the occluder at the same time. In this way, different designs are selected according to the resilience, fixity and flow resistance required by different human body structures. If a disc has high requirements on resilience and fixity, a helical wire skeleton can be used; if it has high requirements on flow resistance, a nickel-titanium alloy wire braided disc can be used.

3. Within a few months after the implantation of the self-adaptive occluder of the present invention, endothelial cells will grow on the surface of the nickel-titanium alloy wire braided disc or the surface of the fixed arm to endothelialize the surface, thereby forming An autologous biofilm that eventually heals the defect.

Description of drawings

Fig. 1 is the structural representation of adaptive occluder in embodiment 1;

Fig. 2 is a schematic structural diagram of an adaptive occluder in embodiment 6;

Fig. 3 is a schematic structural diagram of an adaptive occluder in embodiment 7;

Fig. 4 is the distribution diagram of four and eight fixed arms;

Fig. 5 is a schematic structural diagram of an adaptive occluder in embodiment 8;

Fig. 6 is a schematic structural diagram of the self-adaptive occluder in embodiment 9

7 is a schematic diagram of the use of the self-adaptive occluder in Embodiment 1;

Figure 8 is a schematic diagram of the use of the self-adaptive occluder in embodiment 6;

Fig. 9 is a schematic diagram of the use of the self-adaptive occluder in embodiment 7;

Figure 10 is a schematic diagram of the use of the adaptive occluder in Embodiment 9;

Fig. 11 is a schematic structural diagram of the self-adaptive occluder in embodiment 2;

Fig. 12 is a schematic structural diagram of the self-adaptive occluder in embodiment 3;

Fig. 13 is a schematic structural diagram of an adaptive occluder in embodiment 4;

Fig. 14 is a schematic structural diagram of the self-adaptive occluder in embodiment 5;

Fig. 15 is a schematic structural diagram of the self-adaptive occluder in Embodiment 10.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only for illustrating the invention and are not intended to limit the scope of the invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

As shown in Figure 1, the self-adaptive occluder in this embodiment includes a first occlusion disk and a second occlusion disk for occluding the blood flow at the defect, and the first occlusion disk is connected to stretchable One end connected to the waist is deflected, and the other end of the stretchable and deflectable waist is connected to the second occlusion disk.

The first plugging disc is a nickel-titanium alloy wire braided disc 1, and the nickel-titanium alloy wire braided disc 1 includes a hollow double-layer structure braided by nickel-titanium alloy wire, and the interior of the hollow double-layer structure is One layer of high molecular flow blocking membrane 8 is sutured and fixed to block the blood flow at the defect. The cross section of the nickel-titanium alloy wire braided disk is circular, and the longitudinal section is elliptical.

The second blocking disc includes a fixed arm 2. The fixed arm 2 is laser-cut from a nickel-titanium alloy tube, and there are 16 pieces in total, which are symmetrically distributed in the center. Attach at one end to the connecting waist. The surface of the fixation arm 2 is sutured to fix the polymer blocking membrane, and within a few months after implantation, its surface may also be endothelialized, and at the same time play the role of fixation and closure.

The connecting waist is braided by nickel-titanium alloy wires. The connecting waist includes a columnar body 3 braided by nickel-titanium alloy wires, and two protruding annular parts 9 are formed on the side wall of the columnar body 3 . The protruding annular portion 9 can make the connecting waist have a larger margin when stretching and deflecting, thereby significantly improving its stretching and deflecting performance.

The fixed arm 2 and the connecting waist are fixedly connected by the first fixing member 5. The first fixing member 5 can be made of stainless steel and other materials, and is a ring-shaped multi-layer nesting structure, which is used to connect the fixing arms 2 with different diameters. and connect the waist.

The nickel-titanium alloy wire weaving disc 1 is fixedly connected with the connecting waist through the second fixing member 6 . The second fixing member 6 can be made of stainless steel and other materials, and is an annular multi-layer nested structure, used to connect the braided nickel-titanium alloy wire discs 1 with different diameters and the waist.

The outer side of the nickel-titanium alloy wire braided disc 1 is provided with a threaded steel sleeve 7 for connecting with the delivery device of the occluder. The threaded steel sleeve 7 can be made of stainless steel and other materials, has internal threads, cooperates with the external threads at the front end of the delivery device (push rod) of the occluder, and rotates the end of the delivery system outside the body to complete the release of the occluder. Play the role of connecting the delivery system, delivering the occluder, and releasing it in the body.

When in use, as shown in Figure 7, connect the threaded steel sleeve 7 to the delivery device 15 of the occluder, deliver the self-adaptive occluder in this embodiment to a predetermined position, release it from the delivery sheath, and seal it The occluder recovers from a slender strip to a double-disk structure, and is fixed on both sides of the defective residual wall 13. The delivery device 15 of the occluder is twisted outside the body, and the screw thread on the head is loosened to release the occluder. Within a few months after implantation, endothelial cells will grow on the surface of the braided nickel-titanium alloy wire disc 1 to endothelialize the surface, thereby forming a layer of autologous biofilm, and eventually heal the defect.

Example 2

As shown in Figure 1, the self-adaptive occluder in this embodiment includes a first occlusion disk and a second occlusion disk for occluding the blood flow at the defect, and the first occlusion disk is connected to stretchable One end connected to the waist is deflected, and the other end of the stretchable and deflectable waist is connected to the second occlusion disk.

The first blocking disk includes a fixed arm 2, the fixed arm 2 is laser cut from a nickel-titanium alloy tube, there are 8 pieces in total, and the center is symmetrically distributed. The fixed arm 2 is a straight tube, and one end of the fixed arm 2 is connected to the Link waist link. The surface of the fixed arm 2 is sutured to fix the polymer blocking membrane 8 , and within a few months after implantation, its surface may also be endothelialized, and at the same time play the role of fixation and closure.

The first plugging disc is a nickel-titanium alloy wire braided disc 1, and the nickel-titanium alloy wire braided disc 1 includes a hollow double-layer structure braided by nickel-titanium alloy wire, and the interior of the hollow double-layer structure is A layer of polymer flow blocking membrane is sutured and fixed to block the blood flow at the defect. The cross section of the nickel-titanium alloy wire braided disk is circular, and the longitudinal section is elliptical.

The connecting waist includes a single-layer spherical braided mesh 18 braided by nickel-titanium alloy wires. One end of the spherical braided mesh 18 is connected to the first occlusion disk, and the other end is connected to the second occlusion disk. Due to its good rotation and extension characteristics, the upper and lower disks of the occluder can be released at an angle, satisfying different real anatomical shapes.

The fixed arm 2 and the connecting waist are fixedly connected by the first fixing member 5. The first fixing member 5 can be made of stainless steel and other materials, and is a ring-shaped multi-layer nesting structure, which is used to connect the fixing arms 2 with different diameters. and connect the waist.

The nickel-titanium alloy wire weaving disc 1 is fixedly connected with the connecting waist through the second fixing member 6 . The second fixing member 6 can be made of stainless steel and other materials, and is an annular multi-layer nested structure, used to connect the braided nickel-titanium alloy wire discs 1 with different diameters and the waist.

The outer side of the nickel-titanium alloy wire braided disc 1 is provided with a threaded steel sleeve 7 for connecting with the delivery device of the occluder. The threaded steel sleeve 7 can be made of stainless steel and other materials, has internal threads, cooperates with the external threads at the front end of the delivery device (push rod) of the occluder, and rotates the end of the delivery system outside the body to complete the release of the occluder. Play the role of connecting the delivery system, delivering the occluder, and releasing it in the body.

The usage method of the self-adaptive occluder in this embodiment is the same as that in Embodiment 1.

Example 3

The structure of the self-adaptive occluder of this embodiment is similar to that of Embodiment 2, the difference is that, as shown in Figure 12, the structure of the stretchable and deflectable connecting waist is different. The connecting waist for stretching and deflection is formed by a collar 19, one end of which is connected to the first occlusion disk, and the other end is connected to the second occlusion disk.

The usage method of the self-adaptive occluder in this embodiment is the same as that in Embodiment 1.

Example 4

The structure of the self-adaptive occluder of this embodiment is similar to that of Embodiment 2, the difference is that, as shown in Figure 13, the structure of the stretchable and deflectable connecting waist is different. The stretched and deflected connecting waist is formed by a spring 20, one end of which is connected to the first occlusion disk, and the other end is connected to the second occlusion disk.

The usage method of the self-adaptive occluder in this embodiment is the same as that in Embodiment 1.

Example 5

The structure of the self-adaptive occluder of this embodiment is similar to that of Embodiment 2, the difference is that (1), as shown in Figure 14, the structure of the stretchable and deflectable connecting waist is different, in this embodiment, The stretchable and deflectable connecting waist is composed of a slider-bar combination, one end of the slider-bar combination is connected to the first blocking disk, and the other end is connected to the second blocking disk. (2) The first blocking disk and the second blocking disk include a fixed arm 2, and the fixed arm 2 is formed by laser cutting of a nickel-titanium alloy tube, and there are 8 pieces in total, symmetrically distributed in the center, and the fixed arm 2 is Straight pipe, one end of fixed arm 2 is connected with connecting waist. The surface of the fixed arm 2 is sutured to fix the polymer flow blocking film.

Described slide bar slide block combination comprises central slide rail 210, upper slide block 211, lower slide bar 212, upper slide bar 213 and lower slide bar 214, and upper slide block 211 and lower slide block 212 are respectively arranged on the center slide rail 210. The upper and lower ends can slide independently along the center slide rail 210, the upper slider 213 passes through the upper slider 211, the upper slider 211 can slide along the upper slider 213, the lower slider 214 passes through the lower slider 212, and the lower slider 212 can slide along the lower rod 214, the upper sliding rod 213 and the lower rod 214 are respectively arranged on the upper bracket 215 and the lower bracket 216, and the upper bracket 215 and the lower bracket 216 are respectively connected to the upper sealing plate and the lower sealing plate.

The usage method of the self-adaptive occluder in this embodiment is the same as that in Embodiment 1.

Example 6

As shown in Figure 2, the structure of the self-adaptive occluder in this embodiment is similar to that of Embodiment 1, the difference is that the longitudinal section of the nickel-titanium alloy wire braided disc 1 is trapezoidal, with a concave middle, and the The end faces of the nickel-titanium alloy wire braided disc 1 and the threaded steel sleeve 7 are located on the same plane, which makes it easy for cells to climb and cover, and accelerates endothelialization and recovery. Its use status is shown in Figure 8.

Example 7

As shown in Figure 3, the structure of the self-adaptive occluder in this embodiment is similar to Embodiment 2, the difference is that the fixed arm 2 is a straight tube, the number of which is 4 or 8, evenly distributed in the on the same plane, as shown in Figure 4. Moreover, the end of the fixed arm 2 away from the waist 3 is a spherical structure 10 .

In this embodiment, the structure of the fixed arm 2 is flatter to avoid affecting or wearing other cardiac tissues and structures, and can reduce the occupied volume of the cardiac cavity. The end of the fixed arm 2 away from the connection with the waist 3 has a spherical structure, which can avoid poking the heart tissue.

After the outer side of the fixed arm 2 is sutured with a polymer barrier membrane 8, the immediate sealing effect after implantation can be enhanced. In addition, the flat design of the fixed arm 2 makes it easy for cells to climb and cover, and accelerates endothelialization and recovery.

The usage status of the self-adaptive occluder in this embodiment is shown in FIG. 9 .

Example 8

As shown in FIG. 5 , the structure of the self-adaptive occluder in this embodiment is similar to that of Embodiment 3, the difference being that the threaded steel sleeve 7 is arranged on the outside of the fixed arm 2 . According to the different conditions of the heart defect, such as the difference in pressure difference between the two sides (generally, the blood pressure of the left atrium is greater than that of the right atrium, and the blood pressure of the left ventricle is greater than that of the right ventricle), and the influence of the structure on both sides of the defect is different, the Nitinol alloy wire braided disc 1 and the fixed arm 2 Interchangeable positions, the threaded steel sleeve 7 is placed on the side of the fixed arm 2 to achieve the best blocking effect and fixing effect.

Example 9

As shown in FIG. 6 , the structure of the self-adaptive occluder in this embodiment is similar to that of Embodiment 3, the difference being that the longitudinal section of the nickel-titanium alloy wire braided disc 1 is square, forming a cylindrical structure. For the patent ductus arteriosus (PDA) occluder, the nitinol wire braided disc can be cylindrical or conical according to the shape of the channel connecting the aorta and pulmonary artery. Its use state is shown in FIG. 10 , and the fixed arm 2 is placed on the side of the aorta for fixation. The nickel-titanium alloy wire braided disc 1 plays a sealing role. Generally, the aorta 16 and the pulmonary artery 17 have a certain angle, and under the action of the connecting waist 3, the fixed arm 2 and the nitinol wire braided disc 1 can fit well with the walls of the aorta and arterial duct respectively.

Example 10

The structure of the self-adaptive occluder of this embodiment is similar to that of Embodiment 2, the difference is that, as shown in Figure 15, the structure of the first occlusion disk and the second occlusion disk are different, in this embodiment, the The above-mentioned first occluding disk and the second occluding disk include a helical wire skeleton 22, and the surface of the helical wire skeleton is sewed with a fixed polymer flow-blocking membrane.

The usage method of the self-adaptive occluder in this embodiment is the same as that in Embodiment 1.

Claims (10)

1. a self adaptation stopper, comprise the first shutoff dish for shutoff defect place blood flow and the second shutoff dish, it is characterized in that, the first described shutoff dish connects the one end of the connection waist that can stretch and deflect, and can stretch to be connected the second shutoff dish with the other end of the connection waist deflected.

2. self adaptation stopper as claimed in claim 1, it is characterized in that, the described connection waist stretching and deflect comprises sphere mesh grid (18), and one end of described sphere mesh grid (18) connects the first shutoff dish, and the other end connects the second shutoff dish.

3. self adaptation stopper as claimed in claim 1, it is characterized in that, the described connection waist stretching and deflect comprises the collar (19), and one end of the described collar (19) connects the first shutoff dish, and the other end connects the second shutoff dish.

4. self adaptation stopper as claimed in claim 1, it is characterized in that, the described connection waist stretching and deflect comprises spring (20), and one end of described spring (20) connects the first shutoff dish, and the other end connects the second shutoff dish.

5. self adaptation stopper as claimed in claim 1, is characterized in that, the described connection waist stretching and deflect comprises the combination of slide bar slide block, and one end of described slide bar slide block combination connects the first shutoff dish, and the other end connects the second shutoff dish.

6. self adaptation stopper as claimed in claim 5, it is characterized in that, described slide bar slide block combination comprises center slide rail (210), top shoe (211), sliding block (212), upper slide bar (213) and drop shot (214), top shoe (211) and sliding block (212) be located at respectively center slide rail (210) two ends up and down and can independently centrally slide rail (210) slide, upper slide bar (213) is through top shoe (211), top shoe (211) can slide along upper slide bar (213), drop shot (214) is through sliding block (212), sliding block (212) can slide along drop shot (214), upper slide bar (213) and drop shot (214) are located on upper bracket (215) and lower carriage (216) respectively, upper bracket (215) and lower carriage (216) are connected shutoff dish and lower shutoff dish respectively.

7. self adaptation stopper as claimed in claim 1, it is characterized in that, the described connection waist stretching and deflect comprises the cylindrical body (3) woven by nitinol alloy wire, and the sidewall of described cylindrical body is formed with at least one annular section (9) protruded.

8. self adaptation stopper as claimed in claim 1, it is characterized in that, the first described shutoff dish comprises nitinol alloy wire knitting disc (1); Or the first described shutoff dish comprises at least two fixed arms (2), described fixed arm (2) is the straight tube or curve bend that are cut by Nitinol pipe; Or the first described shutoff dish comprises helix skeleton (22); The second described shutoff dish comprises the hollow structure (1) of nitinol alloy wire braiding; Or the first described shutoff dish comprises at least two fixed arms (2), described fixed arm (2) is the straight tube or curve bend that are cut by Nitinol pipe; Or the first described shutoff dish comprises helix skeleton (22).

9. self adaptation stopper as claimed in claim 8, it is characterized in that, inside or outside stitching of described nitinol alloy wire knitting disc (1) fix at least one deck macromolecule choked flow film, fixing macromolecule choked flow film (8) is sewed up on the surface of described fixed arm (2), and fixing macromolecule choked flow film (8) is sewed up on the surface of described helix skeleton (22).

10. self adaptation stopper as claimed in claim 1, it is characterized in that, the first described shutoff dish or the outside of the second shutoff dish are provided with the steel screw bushing (7) for being connected with the conveyer device of stopper.