KR100780318B1 - Inserting device of artificial blood stent - Google Patents

Abstract

An insertion device of an artificial blood vessel stent is provided to enable a user to insert and fix an artificial blood vessel stent easily into a desired position inside the blood vessel without being affected by blood pressure. A moving tube(3) is inserted into an external tube(2) in the front of a connector(7). A guide passing tube(4) guiding a guide wire is installed inside the moving tube. A cylindrical artificial blood vessel stent(1) is inserted between the moving tube and the external tube. The moving tube is pushed into the external tube, and a stent(1) is inserted into the blood vessel. The middle of the cylindrical artificial blood vessel stent is made of a cylindrical stent member. Reverse turn devices(5) are connected to both sides of an upper end portion of a body of the cylindrical artificial blood vessel stent. Both end portions(5a) of the reverse turn devices protrude to one side of a handle(8).

Description

Artificial blood stent insertion device {Inserting device of artificial blood stent}

1 is a schematic cross-sectional view of the present invention.

2 is a perspective schematic view of an artificial vascular stent 1 used in the present invention.

Figure 3 is a schematic diagram showing an initial step of inserting the artificial blood vessel stent into the blood vessel with the artificial blood vessel stent insertion device of the present invention.

Figure 4 is a schematic diagram showing an intermediate step of inserting the artificial blood vessel stent into the blood vessel with the artificial blood vessel stent insertion device of the present invention.

Figure 5 is a schematic diagram showing the final step of inserting the artificial blood vessel stent into the blood vessels of the artificial vessel stent of the present invention.

Figure 6 is a schematic cross-sectional view showing a state in which the artificial blood vessel stent is inserted into the blood vessel with the insertion vessel of the artificial blood vessel stent of the present invention.

* Explanation of symbols on the main parts of the drawings

1 artificial vessel stent 2 outer tube 3 moving tube

4: Guide Passing Tube 4a: Insertion Tip

5: reverse device 5a: reverse device sock end

6 reversing device insert 7 connector 8 handle 9 blood vessel

The present invention relates to a device for inserting an artificial blood vessel stent that is inserted into a lesion such as an aneurysm of a blood vessel to protect a blood vessel, and in particular, to minimize the effect of resistance due to the flow of blood pressure in the process of inserting an artificial blood vessel stent into a blood vessel. Therefore, the present invention relates to an artificial blood vessel stent insertion device which is easily provided with workability according to the insertion installation into an intravascular lesion.

In general, blood vessels cause aneurysms in which a portion of the blood vessels swell like a balloon due to aging or other diseases.

Such an aneurysm has a risk of bursting the bulge by blood pressure.

In the case of aneurysm of the blood vessel, artificial angioplasty or bypass composition was mainly used in the above-mentioned part through surgical operation. However, the lesion had to be incised, so there was a disadvantage that a large scar and a surgical effect were not so high. .

Due to this problem, various methods for treating without surgery have recently been disclosed, one of which is an artificial vessel stent using a superelastic shape memory alloy wire.

This artificial vessel stent (1) is attached to the both sides, one side or the inside of the hollow cylindrical connector (stent member) made of a fabric weaving a super-elastic shape memory alloy wire to have a plurality of spaces and a certain length Form and the like.

The artificial blood vessel stent (1) is inserted into the intravascular lesion site in a state of minimally reduced volume by a separate insertion device, and then back to expand to the original state to block the aneurysm of the blood vessel (inflated area) Prevent the risk of bursting due to blood pressure.

In general, the insertion device of the artificial blood vessel stent has a moving tube 3 having a handle 8 fixed at one end thereof moving forward and backward in the outer tube 2 in front of the connector 7 as shown in FIG. 1. It is inserted and installed so that the guide tube passing the guide wire 4 is installed in the moving tube (3), the cylindrical artificial vessel stent between the moving tube (3) and the outer tube (2) After inserting (1) in a state in which the diameter is minimized, the moving tube 3 is pushed into the outer tube 2 so that the stent 1 is installed in a blood vessel.

However, in the case of using the conventional apparatus as described above, the artificial vessel stent 1 is expanded to its original shape by its elasticity within the blood vessel at the moment when the artificial vessel stent 1 exits the insertion apparatus, and thus, when the blood pressure is high, Vascular stent (1) has a problem that it is pushed down the vessel by the resistance according to the blood flow occurs, it is difficult to accurately install the artificial vessel stent (1) in the desired intravascular location.

Due to such a problem, in order to lower the blood pressure of the patient before the procedure, the patient had to take the blood pressure lowering drug, and thus, there was a problem of increasing the treatment cost and increasing the risk of medical accident.

In order to solve such a conventional problem, in the Republic of Korea Patent Publication No. 2001-18324, the rear end of the stent is woven on the wire, and when the installation position of the artificial vessel stent is incorrectly selected, the artificial vessel stent is pulled out together with the insertion tube and the outer tube. It is proposed an insertion device of an artificial vessel stent that can be repositioned and then repositioned.

However, since the tip of the artificial vessel stent that is pushed out from the insertion apparatus is expanded and expanded in the ratio when the artificial vessel stent 1 is installed in the blood vessel, the insertion apparatus is pushed downward by the blood flow in the vessel. There was still a problem that could not be improved.

On the other hand, in order to solve the problem as described above in the Republic of Korea Utility Model No. 20-0312490, the end of the artificial vessel stent (1) is tied with a fixing wire supported by the iron core, and then placing the artificial vessel stent at the desired vessel position After removing the iron core to release the fixing wire surrounding the tip portion of the artificial vessel stent insertion method of expanding the tip of the artificial vessel stent has been proposed.

However, the insertion device is complicated to prepare the procedure because the end portion of the artificial vessel stent must be tied with a fixing wire to make a knot, and when the stent comes out of the outer tube, the end portion of the stent does not immediately expand, but the middle portion of the stent And the rear end is immediately expanded and expanded by its elasticity.

As a result, a phenomenon in which the stent is pushed down the blood vessel due to resistance due to blood flow in the blood vessel still occurs, which makes it difficult to install the stent at a desired intravascular position.

In addition, the insertion device of the stent, the middle and the rear end of the stent exiting the outer tube even before removing the iron core is inflated and enlarged immediately in contact with the wall of the adjacent blood vessel, so that the desired vessel position after removing the artificial vessel stent from the outer tube Finding and installing and fixing it was a very difficult problem.

An object of the present invention is to provide an artificial blood vessel stent insertion device that can simultaneously solve the problems described above.

An object of the present invention is to provide an artificial blood vessel stent insertion device capable of easily inserting and fixing an artificial blood vessel stent in a desired position in a blood vessel without being affected by blood pressure. In addition, the present invention is to provide an artificial blood vessel stent insertion device is not necessary to tie the artificial blood vessel stent with a fixing wire is simplified the procedure preparation.

In addition, the present invention is the installation position of the intravascular artificial vessel stent (1) by expanding in the state where the stent member (1b) of the artificial vessel stent is located at the distal end of the artificial vessel stent inverted as the last exit out of the outer tube (2) To provide an artificial blood vessel stent insertion device that can be easily adjusted.

In order to achieve the above object, the artificial blood vessel stent insertion device of the present invention includes a movable tube 3 having a handle 8 fixed at one side thereof moving forward and backward in the outer tube 2 in front of the connector 7. It is inserted and installed so that the guide tube passing the guide wire 4 is installed in the moving tube (3), the cylindrical artificial vessel stent between the moving tube (3) and the outer tube (2) After inserting (1) in a state in which the diameter is minimized, the moving tube (3) is pushed into the outer tube (2) to the artificial vessel stent insertion apparatus for vascular procedure to insert the artificial vessel stent (1) into the blood vessel In; The cylindrical artificial blood vessel stent (1) is composed of a cylindrical stent member (1b) connected to the lower end of the main body (1a) of the cylindrical fabric having a hollow in the middle, the circle In general, both ends of the main body 1a of the artificial vessel stent are inverted devices 5 are connected, and the sock end 5a of the device 5 is protruded to one side of the handle 8. do.

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

First, as shown in FIG. 1, the moving tube 3 having the handle 8 fixed to one side end is inserted into the outer tube 2 in front of the connector 7 so as to be moved forward and backward. In addition, a guide passing tube 4 for guiding a guide wire is inserted into the moving tube 3, and a cylindrical artificial vessel stent 1 is disposed between the moving tube 3 and the outer tube 2. After inserting in a minimized state, the moving tube 3 is pushed into the outer tube 2 so that the stent 1 is configured to be inserted into the blood vessel.

1 is a schematic cross-sectional view of the present invention.

Artificial blood vessel stent (1) used in the present invention is a cylindrical stent member (1b) is attached to the lower end of the stent body (1a) made of a cylindrical fabric hollow in the middle as shown in FIG. Structure and the like.

The stent member 1b has a hollow shape in the center and is made of a metal wire, or is manufactured by cutting a cylindrical metal tube with a laser.

2 is a perspective schematic view of the artificial vessel stent 1 used in the present invention, showing the shape of the artificial vessel stent not inserted into the blood vessel.

As shown in Fig. 1 and 2, the reverse device 5 is connected to both sides of the upper end of the main body 1a of the artificial vessel stent. The sock end portions 5a of the reversing device 5 protrude to one side of the handle 8.

The reversing apparatus 5 is a metal wire or a seal or the like.

An insertion piece 4a is formed at the tip of the guide passing tube 4.

The body 1a of the artificial blood vessel stent is made of a material such as a high density fabric.

Next, a method of using the present invention will be described.

First, an artificial vessel stent 1 of a suitable size is selected according to the length of a lesion site such as an aneurysm of a blood vessel.

Next, the artificial vessel stent (1) is inserted into the guide passing tube (4) and reduced in diameter, and then the moving tube (3) is pulled out of the outer tube (2) artificial vessel stent in the reduced state as described above Insert (1) into the outer tube (2) and position it. As such, when the operation of inserting the artificial vessel stent 5 into the insertion device is completed, the outer tube 2 is inserted and positioned to the front of the intravascular lesion by angioplasty.

In this state, the outer tube 2 is pulled out together with the connector 7 while holding the handle 3, that is, the moving tube 3 is pushed into the outer tube 2 and inserted into the outer tube 2. Slowly push the artificial vessel stent (1) out of the outer tube (2).

At the same time, firmly hold the reversing device sock end (5a) protruding to one side of the handle (8). Thereby, the main body 1a of the artificial blood vessel stent pushed out of the outer tube 2 is fixed to the inverting devices 5 on both sides of the upper end, thereby fixing the tip of the main body 1a, as shown in FIGS. 3 to 5. Likewise, the outer surface is reversed to the inner surface.

Subsequently, when the artificial blood vessel stent 1 is pushed out of the outer tube 2, the members 1b of the artificial blood vessel stent are finally inverted out of the outer tube 2 through the same steps as in FIGS. 4 and 5. It expands in front of the main body 1a of the artificial vessel stent and is installed in the blood vessel 9 as shown in FIG. As shown in FIG. 6, the main body 1a of the artificial vessel stent inserted into the blood vessel is inverted, and the stent member 1b thereof is located inside the tip of the inverted main body 1a and expands to closely contact the blood vessel wall. do. 3 to 5 is a schematic diagram showing the initial stage, the intermediate stage and the final stage of inserting the artificial blood vessel stent into the blood vessel with the artificial blood vessel stent insertion apparatus of the present invention, Figure 6 is the artificial blood vessel stent insertion apparatus of the present invention in the blood vessel It is sectional schematic drawing which shows the state in which an artificial blood vessel stent is inserted.

Next, by pulling only one strand of the sock end portion 5a of the reversing device protruding to one side of the handle 8, the reversing device connected to the upper end of the artificial blood vessel stent main body 1a in the form of a loop by the artificial blood vessel stent 1 Remove from If necessary, an additional auxiliary stent member may be additionally inserted into the artificial blood vessel stent body 1a.

According to the present invention, since the stent member 1b of the artificial blood vessel stent expands inside the distal end portion of the inverted body 1a as it is finally exited from the outer tube 2, the artificial blood vessel is not affected by blood pressure, and the artificial blood vessel is in a desired position in the blood vessel. Since the stent 1 can be easily inserted and fixed, there is an advantage that the patient does not need to take the blood pressure lowering medicine before the procedure. In addition, the present invention has the advantage that the operation preparation is unnecessary because it is not necessary to bind the artificial vessel stent (1) with a separate fixing wire.

Claims (1)

A moving tube 3 having a handle 8 fixed at one end thereof is inserted to move forward and backward in the outer tube 2 in front of the connector 7, and a guide wire in the moving tube 3. A guide passing tube 4 is installed to guide the insertion, and the movable tube 3 is inserted between the movable tube 3 and the outer tube 2 in a state in which the diameter of the cylindrical artificial vessel stent 1 is minimized. An artificial blood vessel stent insertion device for vascular surgery, which pushes 3) into an outer tube (2) and inserts the stent into a blood vessel; The cylindrical artificial blood vessel stent (1) is composed of a cylindrical stent member (1b) connected to the lower end of the main body (1a) of the cylindrical fabric having a hollow in the middle, the circle In general, both ends of the main body 1a of the artificial vessel stent are inverted devices 5 are connected, and the sock end 5a of the device 5 is protruded to one side of the handle 8. Artificial blood vessel stent insertion device.

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