KR102072677B1 - Equipment for stent graft loading - Google Patents

Abstract

The present invention relates to a device for loading a stent graft The present invention relates to a device for loading a stent graft in the embodiment of the stent graft loading in a state in which the stent is reduced in diameter in the vascular lumen, gripping portion with a fixed tube attached to one end ; And a moving tube inserted into the gripping portion and the fixed tube to move back and forth, and having a handle attached to the rear end of the moving tube, and a guide having a moving tube cover connected to the front end of the moving tube. The movable tube cover is disposed to surround the stent inserted to surround the outside of the fixed tube tip, and when the movable tube moves forward, the guide sphere and the movable tube cover also move forward to extend the stent from the rear. By providing a device for loading the stent graft, it is possible to increase the precision of the stent graft installation.

Description

Equipment for stent graft loading

The present invention relates to a device for loading the stent graft, in particular to the stent graft loading device that can install the stent based on the back vessel to expand the stent from the back unlike the conventional stent graft loading device that the stent unfolds from the front It is about.

Aortic aneurysms are diseases in which the walls of blood vessels swell and transform into protrusions or balloons.

Aortic aneurysm is the case where the weakened part due to the degeneration of the artery wall due to atherosclerosis is not able to withstand blood pressure, and it is transformed into spindle or cystic type. Ii) The innermost shell of the three-bark aortic vessel wall is Aortic dissection occurs, in which tearing causes blood to flow into the torn space, which is usually formed when the thin outer wall of the causal lumen, consisting of the outer layer of the media and the outer layer, gradually expands.

In the case of aortic aneurysms, the vascular wall loses its elasticity over time and blood vessels may rupture even at normal blood pressure. Therefore, prompt treatment is required. It was common to treat aortic aneurysms in an enemy way.

However, in recent years, attempts to treat aortic aneurysms using a stent method have been gradually increasing in order to reduce the risks of surgery.

In order to insert the stent into the aortic aneurysm, a separate insertion device is required, and a conventional stent insertion device as shown in FIG. 1 was used.

In the conventional stent insertion device, the inner tube 4 is inserted into the gripping portion 2 and the outer tube 3, and the volume of the stent 1 is reduced between the tip of the inner tube 4 and the outer tube 3. It is inserted and mounted in the state.

At this time, the inner tube (4) is fixed to the front end of the inner tube (4) when the gap between the outer tube (3) and the outer tube (3) as the outer tube (3) moves backward And the stent 1 inserted between the outer tube 3 and the outer tube 3 extend out from the front as shown in FIG.

However, the conventional stent insertion device as described above has to be installed on the basis of the front part when the stent is inflated from the front and the stent is installed, and thus, the rear part of the stent which is finally expanded and restored may be installed farther than the intended position. It may be, or may be installed in a short time to close the unwanted blood vessel during the procedure, there was a problem that can not close the blood vessel to be closed.

Korean Laid-Open Patent Publication (Publication No .: 10-2011-0053510) “Stent graft loading device”

The present invention provides a device for loading the stent graft that can be installed stent graft relative to the back of the device to expand the stent graft more precisely, by installing the stent graft more precisely, The problem is solved.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

In order to solve the above problems, the present invention is a stent graft loading device for operating by putting the stent into the vascular lumen in a state in which the diameter is reduced, gripping portion attached to one end of the fixing tube; And a moving tube inserted into the gripping portion and the fixed tube to move back and forth, and having a handle attached to the rear end of the moving tube, and a guide having a moving tube cover connected to the front end of the moving tube. The movable tube cover is disposed to surround the stent inserted to surround the outside of the fixed tube tip portion from the outside. When the movable tube moves forward, the guide sphere and the movable tube cover also move forward to extend the stent from the rear side. It provides a stent graft loading device characterized in that.

Here, the diameter of the front end of the fixed tube is smaller than the diameter of the rear end, the stent may be located between the movable tube cover and the fixed tube.

Accordingly, the stent may be inserted between the outside of the movable tube cover and the fixed tube tip in a state where the diameter is reduced.

At this time, the stent includes a stent ring which is tied to the stent fixing chamber, and a stent fixing chamber hole is formed on one surface of the fixing tube inserted into the fixing tube, and the stent fixing chamber is formed inside and outside of the fixing tube through the stent fixing chamber hole. Characterized in that it can move freely.

In addition, the gripping portion includes a stent fixing pin, the stent fixing pin is connected to the stent fixing chamber, by rotating the stent fixing pin to pull the stent fixing chamber, characterized in that the stent ring can be separated from the device do.

In addition, at least one flushing hole is formed at the front end of the moving tube.

According to another embodiment of the present invention, a method of using the apparatus for loading the stent graft includes the steps of: (a) inserting a stent insertion portion of the apparatus for loading the stent graft to the aortic aneurysm position; (b) holding the gripping portion and pushing the handle to move the moving tube and the guide hole connected to the moving tube and the moving tube cover to spread the stent from the rear; And (c) after the remaining portions of the stent except for the stent ring are fully unfolded, separating the stent ring from the fixed tube by rotating the stent fixing pin of the gripping part, and installing the stent to the aortic aneurysm. A surgical method using the device is provided.

At this time, (d) injecting saline through the guide tube to fill the space in which the stent between the moving tube cover and the fixed tube with saline; may further comprise a.

In addition, the step (a) is characterized in that the insertion of the stent insertion portion to the aortic aneurysm using the wire.

In the present invention, the stent graft is inserted into the blood vessel with the aortic aneurysm in a non-invasive manner, thereby preventing the inflow of blood flow into the swollen blood vessel, thereby preventing rupture and treating the aortic aneurysm by inducing blood flow toward the leg blood vessel.

In addition, unlike the conventional stent graft loading device in which the stent unfolded from the front, by providing a stent graft loading device in which the stent is unfolded from the rear, the stent can be installed relative to the back of the device so that the stent graft can be installed more accurately. This can solve the conventional problem of closing unwanted blood vessels.

Figure 1 (a) is a view of a conventional stent graft loading device, Figures 1 (b) and (c) is a view showing a stent procedure using a conventional stent graft loading device.
2 is a perspective view of a device for loading stent graft according to an embodiment of the present invention.
3 is a cross-sectional view of an apparatus for loading stent graft according to an embodiment of the present invention.
Figure 4 is an enlarged view of the stent insertion portion constituting the device for loading the stent graft of the present invention.
5 is a view illustrating a process of restoring the stent of the apparatus for loading the stent graft of the present invention into a cylindrical shape by starting expansion from the rear.
6 is a view showing a state in which the stent fixing chamber of the present invention is connected to the stent fixing pin and the stent ring.
7 is a view showing a state in which the stent is installed in the branched vessel using the apparatus for loading the stent graft of the present invention.

Hereinafter, with reference to the drawings will be described the present invention in more detail. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed description of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

When a component is referred to as being connected or connected to another component, it is to be understood that although the component may be directly connected or connected to the other component, there may be other components in between. In addition, when a member is located "on" another member throughout this specification, this includes not only when one member is in contact with another member but also when another member exists between the two members.

In the present application, the term “comprises” or “having” is intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more. It is to be understood that it does not exclude in advance the possibility of the presence or addition of other features or numbers, steps, operations, components, components or combinations thereof.

Prior to the description of the present invention, a brief description will be made of a conventional apparatus for loading a stent graft with reference to FIG. 1.

Figure 1 (a) is a view of a conventional stent graft loading device, Figures 1 (b) and (c) is a view showing a stent procedure using a conventional stent graft loading device.

As briefly mentioned above, in the conventional stent graft loading device, an inner tube 4 is inserted into the gripping portion 2 and the outer tube 3, and between the tip of the inner tube 4 and the outer tube 3. There is a stent (1) is inserted in a reduced volume state.

Then, as shown in (b) of FIG. 1, when the inner tube 4 is moved to the rear in the fixed state, the stent is reduced and positioned between the front end of the inner tube 4 and the outer tube 3. When (1) starts to expand from the front, and the movement of the inner tube 4 to the front continues, the stent 1 is expanded to a complete shape as shown in FIG.

Conventional stent graft loading device inevitably had to be installed based on the front part when the stent (1) is installed in consideration of the feature that the stent (1) starts to expand from the front as described above, and thus the stent (1) is the final The back portion of the inflated stent (1) may be installed farther than the intended position, or may be installed shorter to close the unwanted blood vessels during the procedure, or to prevent the blood vessels to be closed .

Accordingly, the present invention is to solve the conventional problem by providing a device for loading the stent graft that can be installed in a more accurate position by expanding the stent from the rear, unlike the conventional embodiment.

Hereinafter, a device for loading a stent graft according to an embodiment of the present invention will be described with reference to FIGS. 2 to 6.

2 is a perspective view of a device for loading stent graft according to an embodiment of the present invention. 3 is a cross-sectional view of an apparatus for loading stent graft according to an embodiment of the present invention. Figure 4 is an enlarged view of the stent insertion portion constituting the device for loading the stent graft of the present invention. FIG. 5 is a view illustrating a process of restoring a stent of a device for loading a stent graft of the present invention into a cylindrical shape by starting expansion from the rear. 6 is a view showing a state in which the stent fixing chamber of the present invention is connected to the stent fixing pin and the stent ring.

In the present invention, in the stent graft loading device for the procedure by putting the stent into the vascular lumen while reducing the diameter,

A gripping portion 11 to which a fixed tube 12 is attached at one end; And a moving tube 13 inserted into the gripping portion 11 and the fixed tube 12 to move back and forth.

A handle 14 is attached to the rear end of the moving tube 13, and a guide port 17 having a moving tube cover 19 is connected to the front end of the moving tube 13, and the moving tube cover 19 is connected. Is arranged to surround the stent (15) inserted to surround the outside of the front end of the fixed tube 12, when the movable tube 13 moves forward, the guide sphere 17 and the moving tube cover ( 19) also provides a device for loading the stent graft, characterized in that moving to the front stent 15 is unfolded from the rear.

At this time, as shown in Figure 4 the diameter (D1) of the front end of the fixed tube 12 is smaller than the diameter (D2) of the rear end or the middle is formed a space for the stent 15 is inserted, through which the stent (15) ) May be located between the movable tube cover 19 and the fixed tube 12 (the tip of the fixed tube). Here, the tip of the fixed tube 12 means a portion corresponding to the moving tube cover 19.

The stent graft loading device of the present invention is connected to the guide sphere 17 having a moving tube cover 19 at the tip of the moving tube 13, when the moving tube 13 moves forward, the guide sphere ( 17 and the moving tube cover 19 is also moved forward with the moving tube (13).

In addition, by having a moving tube cover 19 connected to the guide sphere 17 as described above, while the guide sphere 17 is away from the tip of the fixed tube 12, the moving tube cover 19 and the fixed tube ( 12) The stent 15 inserted between the distal ends is unfolded from the rear as shown in FIG.

As the stent 15 can be unfolded from the rear, the device for loading the stent graft of the present invention can install the stent 15 based on the rear (rear) portion of the stent 15, so that unwanted blood vessels can be placed on the stent ( The conventional problem of closing by 15) can be solved. A detailed process of installing the stent 15 in the aortic aneurysm will be described later.

Next, look at the stent 15, which is a key component of the device for loading the stent graft according to an embodiment of the present invention.

The stent 15 is formed in a cylindrical shape, and as mentioned above, the stent 15 may be inserted in a state in which the diameter of the stent is reduced between the tip of the fixed tube 12 and the movable tube cover 19.

At this time, the stent 15 is formed of a superelastic shape memory wire, the stent 15 may be produced by weaving a superelastic shape memory wire, but is not limited thereto, and may be manufactured in other ways.

In addition, the stent 15 includes a stent ring 22, the stent ring 22 is tied by the stent fixing chamber 20, as described later to rotate the stent pin 16 to the stent If the ring 22 is not released from the stent fixing chamber 20, the stent ring 22 is fixed to the fixed tube 12.

At this time, the stent fixing chamber hole 21 is formed on one surface of the fixing tube 12, as shown in FIGS. 5 to 6, the stent fixing chamber 20 for tying the stent ring 22 is the stent fixing chamber hole 21 It can move freely inside and outside the fixing tube 12 through.

In this case, the stent fixing chamber hole 21 is preferably formed in a region adjacent to the stent ring 22 among one surface of the fixing tube 12.

In addition, the gripping portion 11 includes a stent fixing pin 16 penetrating the inside of the gripping portion 11, and the stent fixing pin 16 is connected to the stent fixing chamber 20 to secure the stent. The stent fixing pin 16 and the stent ring 22 may be connected through the seal 20.

At this time, the stent fixing chamber 20 is wound around the stent fixing pin 16 as shown in Figure 6, the stent fixing chamber 20 and the stent fixing pin 16 may be connected, but is not limited thereto. The stent fixing chamber 20 is integrally coupled to the pin 16 so that the stent fixing chamber 20 may be wound on the stent fixing pin 16 according to the rotation of the stent fixing pin 16.

That is, the stent fixing chamber 20 coupled to the stent fixing pin 16 is present in the fixing tube 12, but the stent fixing chamber 20 is fixed tube 12 through the stent fixing chamber hole 21. The stent fixing chamber 20, which may come out of the fixing tube 12, is positioned between the front end of the fixing tube 12 (outer region of the fixing tube) and the moving tube cover 19. 15), specifically, may be connected to the stent ring 22.

Next, the process of installing the stent 15 using the apparatus for loading the stent graft of the present invention will be described in detail with reference to FIGS. 5 and 6.

At this time, Figure 5 is a cross-sectional view of the apparatus for loading the stent graft of the present invention as a whole, in order to more clearly show the process of unfolding the stent 15, the stent 15 portion is shown in a three-dimensional view.

I) First, when the moving tube 13 hardly moves forward as shown in FIG. 5 (a), the guide sphere 17 and the tip of the fixed tube 12 are close to each other, thereby expanding the stent 15. This does not happen.

However, ii) when the moving tube 13 moves forward by a predetermined distance or more, as shown in FIG. 5 (b), the guide tube 17 and the distal end of the fixed tube 12 are separated from the moving tube cover 19 ) And the stent 15 inserted between the distal end of the fixed tube 12 little by little. At this time, the stent 15 is formed of a super-elastic shape memory wire as described above has a property to restore to the existing cylindrical shape, due to the presence of the stent moving tube cover 19 of the present invention 15) withdraws and starts to unfold from the rear.

Next, when the moving tube 13 continues to move forward, the stent 15 inserted between the moving tube cover 19 and the distal end of the fixed tube 12 is completely as shown in FIG. Withdrawn. However, since the stent ring 22 is still tied by the stent fixing chamber 20, the rear of the stent 15 is bent in the rear end direction of the moving tube 13.

At this time, when the stent fixing pin 16 is rotated in one direction, the stent fixing chamber 20 is wound around the stent fixing pin 16 and the length of the stent fixing chamber 20 is shortened. The ring 22 is released from the stent fixing chamber 21 so that the stent 15 is fully inflated as shown in FIG.

That is, as the stent 15 is fully inflated, the stent 15 may be separated from the fixed tube 12 and installed in the aortic aneurysm.

Next, the apparatus for loading the stent graft of the present invention further includes a guide tube 18 inserted into the handle 14 and the moving tube 13, and a wire w passes through the inside of the guide tube. It may be inserted from the rear end of the guide tube to the tip of the moving tube. In addition, a hole is formed in the guide sphere 17 so that the wire (w) inserted from the rear end of the guide tube 18 may pass through the guide sphere 17 and penetrate the entire apparatus for loading the stent graft.

The wire (w) inserted into the guide tube 18 is the fixed tube 12, the moving tube 13, the guide sphere 17, the guide tube of the present invention along the inside of the vessel in the process of installing the stent 15 (18) It serves to guide the back to where the aortic aneurysm is located.

In addition, at least one flushing hole 23 may be formed at the tip of the moving tube 13 of the present invention.

The flushing hole 23 is located at a position adjacent to the guide sphere 17 in the tip region of the movable tube 13, and the stent 15 is disposed between the tip of the fixed tube 12 and the movable tube cover 19. It serves to fill the space to be inserted with saline.

Specifically, when the saline solution is supplied through the guide tube 18 in a state in which the hole of the guide sphere 17 is closed, the saline solution flows out through the flushing hole 23 at the tip of the moving tube 13 to fix the tube 12. It is possible to fill the space in which the stent (15) is inserted between the front end and the moving tube cover (19).

By filling the space in which the stent 15 is inserted with saline as described above, the air inside the stent graft loading apparatus can be removed, and when the stent 15 is unfolded, saline water rather than air can be introduced into the blood vessel. have.

Next, a treatment method using the apparatus for loading a stent graft as described above is another embodiment of the present invention.

According to another embodiment of the present invention, a method of using the apparatus for loading the stent graft includes the steps of: (a) inserting the stent insertion portion 100 of the apparatus for loading the stent graft to the position of the aortic aneurysm; (b) While holding the holding part 11, the handle 14 is pushed to move the moving tube 13 and the guide hole 17 and the moving tube cover 19 connected to the moving tube 13 to move the stent to the front. Unfolding (15) from behind; And (c) after the remaining portion of the stent 15 except for the stent ring 22 is fully unfolded, the stent ring 22 is rotated from the fixed tube 12 by rotating the stent fixing pin 16 of the gripping portion 11. Separating, providing a stent (15) to the aortic aneurysm provides a method of using a device for loading the stent graft comprising a.

At this time, the stent insertion unit 100 is fixed tube 12, the moving tube 13, the guide 17, the moving tube cover 19 and the stent 15 is inserted into the blood vessel for the installation of the stent 15 Means. In addition, the process of installing the stent 15 is the same as described above, a detailed description of the above content will be omitted below.

In addition, the surgical method using the apparatus for loading the stent graft of the present invention (d) prior to inserting the stent insertion part 100 into the blood vessel, through the guide tube 18 in a state of blocking the hole of the guide mechanism 17 Injecting saline to fill the space in which the stent 15 between the mobile tube cover 19 and the fixed tube 12 is inserted with saline;

More specifically, the saline solution supplied from the guide tube 18 flows into the space into which the stent 15 is inserted through the flushing hole 23 formed in the moving tube 13, and the air is filled with the saline solution. While preventing the inflow of blood vessels, it is possible to allow the saline solution to enter the blood vessels when the stent 15 is fully unfolded.

In addition, the step (a) by using the wire (w) to accurately insert the stent insertion portion 100 to the aortic aneurysm position, it is possible to install the stent 15 more accurately.

The present invention provides a device for loading the stent graft as described above and a method of using the same, by installing a stent inside the blood vessel with the aortic aneurysm to prevent blood flow into the bulging vessel to prevent blood vessels from rupturing, Blood flow can be directed towards the leg blood vessels to efficiently treat aortic aneurysms (particularly thoracic aortic aneurysms).

In addition, unlike the conventional device for loading the stent graft, which has been forced to install the stent with respect to the front of the device because the stent is unfolded from the front, the device of the present invention is installed from the back of the device to install the stent with respect to the back of the device. This can prevent the closure of unwanted blood vessels, and can also close the blood vessels in a more accurate position even when the blood vessels must be closed.

For example, when the aortic aneurysm is located at the top of the celiac trunk, as shown in FIG. 7 (a), the celiac artery should not be closed. The conventional stent graft loading device is based on the front of the stent. There was a problem that can be installed to close the celiac artery. However, the device of the present invention can install the stent on the basis of the back of the device to prevent the abdominal artery is closed by installing the stent on the basis of the upper side of the abdominal artery.

In addition, when the aortic aneurysm is located between the peritoneal artery (Celiac trunk) and the superior mesenteric artery (SMA), as shown in FIG. 7 (b), only the abdominal artery should be closed without closing the superior artery. There was a problem in that the stent graft was inadvertently closed to the superior hepatic artery based on the front of the device for loading the graft graft. However, the device of the present invention can install the stent on the basis of the back of the device, by installing the stent on the basis of the upper hepatic artery can be accurately closed the abdominal artery without closing the superior artery.

That is, the stent graft loading device of the present invention as described above has the advantage that the stent can be installed accurately compared to the conventional device.

While the above has been shown and described with respect to preferred embodiments and applications of the present invention, the present invention is not limited to the specific embodiments and applications described above, the invention without departing from the spirit of the invention claimed in the claims Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

11: grip part 12: fixed tube
13: moving tube 14: handle
15: stent 16: stent fixing pin
17: guide sphere 18: guide tube
19: moving tube cover 20: stent fixing chamber
21 stent fixing chamber hole 22 stent ring
23: flushing hole 100: stent insertion

Claims (10)

In the device for loading the stent graft in which the stent is injected into the lumen of the vessel with the diameter reduced,
A gripping portion having a fixed tube attached to one end; And
Includes; the moving tube is inserted into the holding portion and the fixed tube to move back and forth,
A handle is attached to the rear end of the moving tube, and a guide tool having a moving tube cover is connected to the front end of the moving tube, and the moving tube cover surrounds the stent inserted to surround the outside of the fixed tube tip. Placed,
When the moving tube moves forward, the guide sphere and the moving tube cover also moves forward to extend the stent from the rear,
The stent includes a stent ring that is tied to the stent fixing chamber,
A stent fixing chamber hole is formed on one surface of the fixing tube inserted into the fixing tube so that the stent fixing chamber can move freely inside and outside of the fixing tube through the stent fixing chamber hole.
The gripping portion includes a stent fixing pin,
The stent fixing pin is connected to the stent fixing chamber, the stent graft loading device can be separated from the device by pulling the stent fixing chamber by rotating the stent fixing pin
The method of claim 1,
Stent graft loading device, characterized in that the diameter of the fixed tube tip is smaller than the diameter of the rear end, the stent can be located between the moving tube cover and the fixed tube
The method of claim 2,
The stent graft loading device, characterized in that inserted between the outer tube and the outer end of the fixed tube in the state of reduced diameter
delete delete The method of claim 1,
And a guide tube inserted into the handle and the moving tube.
Stent graft loading device, characterized in that a wire penetrates the inside of the guide tube and can be inserted from the rear end of the guide tube to the tip of the moving tube.
The method of claim 1,
At least one flushing hole is formed at the tip of the moving tube.
delete delete delete

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