KR200207213Y1 - Srent graft and stent insertion apparatus - Google Patents

Abstract

The present invention minimizes the diameter of the stent insertion device so that the artificial blood vessel stent can be easily installed inside the blood vessel using the puncturing method, and it is possible to maintain the shape of the artificial blood vessel stent without a separate support as well as the artificial blood vessel stent. The present invention relates to an artificial blood vessel stent and a stent insertion device that can be easily inserted into or removed from an insertion device.

An outer tube and an inner diameter each formed to have a predetermined size or less, and an insertion tube member for inserting the artificial vessel body and the first stent member of the artificial vessel stent while shrinking to a predetermined size; In a state in which the second stent member of the artificial vessel stent, which is movably inserted into the insertion tube member and can be reduced to a smaller size than the first stent member, is inserted while being reduced, A first pusher member for pushing the first stent member and the artificial blood vessel body outward of the insertion tube member; The artificial vessel stent is movably inserted into the first pusher member, and the second vessel member of the artificial vessel stent inserted into the first pusher member is pushed outward of the insertion tube member to move the artificial vessel stent into the vessel. It includes a second pusher member for installation in.

Description

Artificial blood vessel stent and stent insertion device {SRENT GRAFT AND STENT INSERTION APPARATUS}

The present invention relates to an artificial blood vessel stent and a stent insertion device, and more specifically, to minimize the diameter of the stent insertion device, the artificial blood vessel stent can be easily installed inside the blood vessel using a puncture method, and without artificial support The present invention relates to an artificial blood vessel stent and a stent insertion apparatus that not only maintain a shape of a blood vessel stent, but also allow an artificial vessel stent to be easily inserted into or withdrawn from the stent insertion apparatus.

For example, an aneurysm is a disease in which an artery swells like a balloon, which is a very dangerous disease because the weakened blood vessel wall may be ruptured if the intravascular pressure rises above a certain size.

Among the methods of treating such aneurysm, artificial vessel stent was developed to solve the problem through surgical operation and to minimize the pain to the patient without surgery, but the intubator size was 6mm. As it becomes larger, it is more convenient than surgery by opening and inserting the vessel locally surgically, but there is still the inconvenience of having to operate locally and it is difficult to install if the vessel is meandering. It is used.

The puncture method is to drill a small hole in a blood vessel, in particular, an artery, without surgery to open the blood vessel locally, through which the stent intubator is inserted into the artery, and the artificial vessel stent is inserted into the artery by the passage. It is a treatment method to install in the lesion area.

In order to use this puncturing method, not only the inner diameter of the stent intubator is formed to be 4 mm or less and the outer diameter is formed to be 4.5 mm or less, but also the artificial vessel stent can be inserted into the stent intubator. When inserted into the stent cannula it is necessary for the artificial vessel stent to be compacted to a size smaller than the inner diameter of the cannula, for example.

However, the above-described conventional stent intubator is formed to a predetermined size or less in the inner diameter and to push the artificial vessel stent is inserted into the insertion tube and the insertion vessel slidably inserted into the insertion tube and inserted into the insertion tube In addition, the conventional artificial blood vessel stent is made of a pusher for the artificial blood vessel body is inserted into the interior of the blood vessel, and the artificial blood vessel is installed on both ends of the artificial blood vessel body to maintain the shape of the body of artificial blood vessels It is made of stent with elastic force.

Therefore, since the stent of the artificial blood vessel stent has the same structure and overlaps with the artificial blood vessel body, the volume of the cross-sectional area increases when the artificial blood vessel stent is contracted, and thus the size of the insertion tube for inserting the artificial blood vessel stent is increased. There is a problem that becomes large.

Therefore, the present invention has been proposed to solve the above problems, and the object of the present invention is to minimize the diameter of the stent insertion device, the artificial vessel stent can be easily installed inside the blood vessels using the puncture method, and a separate support The present invention provides an artificial blood vessel stent and a stent insertion apparatus that can maintain the shape of the artificial blood vessel stent as well as easily insert or remove the artificial blood vessel stent into or out of the insertion apparatus.

In order to achieve the above object, the present invention, the outer diameter and the inner diameter are each formed in a predetermined size or less, the insertion vessel member for inserting while reducing the artificial vessel body and the first stent member of the artificial vessel stent to a certain size; It is inserted into the insertion tube member so as to be movable, and is inserted while shrinking the second stent member and the artificial blood vessel body of the artificial vessel stent, and the second stent member is inserted together with the first stent member and the artificial vessel. A first pusher member for pushing to the tip of the first pusher member; A second insert movably inserted into the first pusher, a catheter for passage through the guide member, and a second stent member for pushing the second stent member of the artificial vessel stent inserted into the first pusher toward the distal end of the insertion tube member; And a pusher member.

1 is a front view showing an artificial vessel stent according to the present invention.

Figure 2 is an exploded perspective view showing a stent insertion device according to the present invention.

3 is a view showing a state of use of the artificial blood vessel stent and the stent insertion device according to the present invention, a cross-sectional view showing a state in which the artificial blood vessel stent is partially inserted into the insertion device.

Figure 4 is a view showing a state of use of the artificial blood vessel stent and the stent insertion device according to the present invention, a cross-sectional view showing a state in which the artificial blood vessel stent is fully inserted into the insertion device.

5 is a view showing a state of use of the artificial blood vessel stent and the stent insertion apparatus according to the present invention, a cross-sectional view showing a state in which the artificial blood vessel stent is pulled out of the insertion apparatus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, the artificial vessel stent 1 according to the present invention has flexibility to be arbitrarily bent and is formed in a cylindrical shape or a partial cylindrical shape and the like, and is inserted into the blood vessel to be inserted into the inside of the blood vessel. An artificial blood vessel body 3 for preventing pressure from being applied to the weakened blood vessel wall;

The first stent member which is installed with a predetermined structure at one end of the artificial blood vessel body 3 and can be reduced to a predetermined size so as to support the shape of the artificial blood vessel body 3 and has a predetermined size of expandability (5);

The other end of the artificial blood vessel body 3 has a structure different from that of the first stent member 5 described above and is smaller in size than the first stent member 5 while supporting the shape of the artificial blood vessel body 3. And a second stent member (7) having a certain size of flexibility.

In addition, the first stent member 5 forms at least one or more turns to form a cylindrical shape at the other end of the artificial blood vessel body 3 and is connected at regular intervals by the first connection member 9. One first stent member 5 is preferably twisted at least once when one turn intersects the other one turn to form a mesh structure so as to retain expansion force of a predetermined size or more.

Between the first stent member 5 and the artificial blood vessel body 3, the blood vessel flows when the artificial blood vessel stent 1 is installed inside the blood vessel by a first connection member 9 to have a predetermined length (eg, It is preferable to maintain the interval of 3-6 mm) or more.

The first stent member 5 may be formed to a thickness of a predetermined size (for example, 0.3 mm) or less so that the first stent member 5 may be contracted to a constant volume so as to be installed by the puncturing method.

The second stent member 7 is formed to have flexibility while being able to contract and expand itself on one end of the artificial blood vessel body 3, and reciprocate in a zigzag shape from one end of the circumferential surface to the other end thereof. Spirally wound along the circumferential surface to form a mesh structure to cross each other and are connected at regular intervals by the second connecting member (11).

Between the second stent member 7 and the artificial blood vessel body 3 is a predetermined length (eg, by the second connecting member 11 so that blood flows when the artificial blood vessel stent 1 is installed inside the blood vessel) It is preferable to maintain the interval of 3-6 mm) or more.

The second stent member 7 may be formed to a thickness of a predetermined size (eg, 0.25 mm) or less so that the second stent member 7 may be reduced to a smaller volume than the first stent member 5.

In addition, the stent insertion device is formed to have a predetermined length or more, and the outer diameter and the inner diameter are each formed to a predetermined size or less, and the artificial vessel body 3 and the first stent member 5 of the artificial vessel stent 1 are reduced to a predetermined size. An insertion tube member 13 for insertion while being inserted;

Is inserted into the insertion tube member 13 so as to be movable, the second stent member 7 of the artificial vessel stent 1 that can be reduced to a smaller size than the first stent member 5 while being inserted And a first pusher member for pushing the first stent member 5 and the artificial blood vessel body 3 to the outside of the insertion tube member 13 while the second stent member 7 is inserted. 15;

Of the artificial vessel stent (1) is inserted into the first pusher member 15 so as to be movable, the catheter 17 for passing the guide member is inserted into the inside of the first pusher member (15). And a second pusher member 19 for pushing the second stent member 7 outward of the insertion tube member 13 so as to install the artificial vessel stent 1 inside the blood vessel.

The insertion tube member 13 has an outer diameter of 4.5 mm to 4.7 mm so that the artificial vessel stent 1 and the first pusher member 15 can be easily inserted into the vessel, and the artificial vessel stent 1 and 15 can be easily inserted. It is preferable to form below and to form inner diameter below 4 mm.

In addition, the first pusher member 15 has an outer diameter of 3.8 mm to 3.9 so that the first pusher member 15 can be easily inserted into the insertion tube member 13 and the second stent member 7 can be easily inserted. It is preferable to form below mm and to form inside diameter below 3 mm-3.4 mm.

In addition, the insertion tube member 13 and the first pusher member 15 may be formed of a synthetic resin such as Teflon having flexibility to easily install the artificial vessel stent 1, or the like.

The second pusher member 19 can easily move inside the first pusher member 15 as well as easily push the second stent member 7 toward the distal end of the insertion tube member 13. Hard metals such as iron, steel, etc., or non-metals such as aluminum, or alloy steels thereof are formed by winding them in a coil shape, and outer diameters of 2.7 mm to 2.9 mm or less are formed, and inner diameters are 1.4 mm to 1.6 mm. It is preferable to form below.

In addition, a reinforcing member 21 for reinforcing the rigidity of the second pusher member 19 is provided in the inside of the second pusher member 19 to a predetermined length, and the reinforcing member 21 is provided in a second length. As long as the rigidity of the pusher member 19 can be reinforced, it may be made of synthetic resin, metal, nonmetal, or any other material.

The catheter 17 for passing the guide member is formed to have an outer diameter of 1mm ~ 1.3mm or less and also to the inner diameter of 0.9mm ~ 1mm or less, the tip portion 23 for the induction of the guide member is formed in a streamlined shape at the tip end thereof. The outer diameter of the tip portion 23 is preferably 4 mm or less.

Accordingly, looking at the process of installing the artificial vessel stent according to the present invention inside the blood vessel using the stent insertion device as follows.

First, the insertion tube member 13 and the first pusher member 15 are inserted to the outside of the guide member passage catheter 17, and then the insertion tube member 13 at a predetermined position of the guide member passage catheter 17. The distal end of the and the distal end of the first pusher member 15 are disposed to face each other at a predetermined distance.

In the state where the second stent member 7 of the artificial blood vessel stent 1 is reduced, the second stent member 7 is inserted into the distal end side of the first pusher member 15 as shown in FIG. The first stent member 5 and the artificial blood vessel body 3 of the artificial blood vessel stent 1 are inserted into the distal end portion of the member 13 while being sequentially reduced.

In this state, the first pusher member 15 is inserted into the distal end portion of the insertion tube member 13 from the distal end thereof, and then the first pusher member 15 is inserted along the inside of the insertion tube member 13. When the insertion tube member 13 is pushed toward the distal end of the first pusher member 15 while pushing toward the distal end of the 13 or the first pusher member 15 is fixed, the first pusher member 15 is artificial. The artificial vessel body 3 of the vessel stent 1 is pushed to the distal end portion of the insertion tube member 13, and the first stent member 5 of the artificial vessel stent 1 is moved to the insertion tube member 13 as shown in FIG. It is located at the tip.

As described above, the distal end portion of the insertion tube member 13 is inserted into the catheter 17 for induction member passage while the artificial vessel stent 1 is inserted into the insertion tube member 13 and the first pusher member 15. Using an induction member (not shown) to be inserted into the vascular lesion site of the patient.

In this state, when the first pusher member 15 is pushed to the tip end of the insertion tube member 13, the first pusher member 15 inserts the artificial blood vessel body 3 of the artificial vessel stent 1 into the insertion tube member ( 13, the first stent member 5 and the artificial blood vessel body 3 of the artificial vessel stent 1 come out of the insertion tube member 13 as shown in FIG. 5.

In addition, when the second pusher member 19 is inserted from the inside of the distal end of the first pusher member 15 and then the second pusher member 19 is pushed outward of the distal end of the insertion tube member 13, One second pusher member 19 pushes the second stent member 7 outward of the first pusher member 15 and the insertion tube member 13, and the second stent member 7 is inserted into the insertion tube. The first stent member 5, the artificial blood vessel body 3, and the second stent member 7 of the artificial vessel stent 1 are installed inside the blood vessel. will be.

As such, the present invention minimizes the diameter of the stent insertion device so that an artificial blood vessel stent can be easily installed in a blood vessel using a puncturing method, and can support the stent without a separate support as well as insert an artificial blood vessel stent. Since it can be easily inserted into the device or taken out of the insertion device can provide a convenience to use, there is an effect that the production of artificial vessel stents become simple.

Claims (4)

An artificial blood vessel body having a flexibility to bend arbitrarily and formed into a cylindrical or partial cylindrical shape and the like and inserted into the blood vessel to prevent the pressure inside the blood vessel from being applied to the weakened blood vessel wall; A first stent member which is installed with a predetermined structure at one end of the artificial blood vessel body and is reduced in a predetermined size so as to support the shape of the artificial blood vessel body and has a predetermined size of expandability; The other end of the artificial blood vessel body is installed having a different structure from the first stent member, and while supporting the shape of the artificial blood vessel body can be reduced to a smaller size than the first stent member, the agent having a certain size of flexibility An artificial blood vessel stent comprising a 2 stent member. The artificial blood vessel stent of claim 1, wherein the first stent member forms at least one or more turns to form a cylindrical shape at the other end of the artificial blood vessel body. The artificial blood vessel stent of claim 2, wherein the first stent member is twisted at least one or more times when one turn intersects another one turn to form a mesh structure so as to retain expansion force of a predetermined size or more. The method of claim 1, wherein the second stent member is formed to have flexibility while being able to contract and expand itself on one end of the artificial blood vessel body, and reciprocate in a zigzag shape from one end of the circumferential surface to the other end thereof. An artificial vessel stent wound spirally along a circumferential surface and intersecting with each other to form a mesh structure.