KR20040087806A - Stent insertion device - Google Patents

Abstract

PURPOSE: A stent insertion device is provided which maximizes operation performance by allowing a stent for expansion of a vessel or duct around a stenotic lesion to be easily and accurately installed at and inserted into a desired location of the stenotic lesion. CONSTITUTION: The stent insertion device comprises a movable tube(12) having a handle(10) fixed at its one end, the movable tube(12) inserted into an outer tube(22) provided in front of a connector(20) capable of reciprocating back and forth; a connecting tube(25) having an insertion tip(26) connected to a leading edge of the movable tube(12), and a stent(5) having a hollow cylindrical body having multiple space portions between the connecting tube(25) and the outer tube(22) and inserted into a stenotic lesion; and a thread hole formed at the center of the connecting tube(25) to form a groove in which a central portion of the stenotic lesion is placed, such that one-side ends of a plurality of fixing threads are inserted into the thread hole in a loop type and supported by a wire, and the other-side ends of the plurality of fixing threads penetrate through the space portions to encase and tighten the stent(5).

Description

Stent insertion device for the treatment of stenosis of the body {STENT INSERTION DEVICE}

The present invention relates to an insertion device for inserting a stent for expanding the stenosis of the body into the stenosis of the body, more specifically, the narrowing of the blood vessels by blood clots, as well as narrowing of the esophagus due to cancer, biliary stricture, pyloric Stent insertion device for stenosis of the body to maximize the workability because the installation of the stent for stenosis progression or widening the stenosis, such as stenosis of the stenosis is easy and accurate insertion.

Conventionally, stenosis progression or stenosis of the body, such as narrowing of blood vessels by blood clots, narrowing of the esophagus, biliary tract, pyloric stenosis, etc. due to cancerous masses was mainly performed through surgical surgery.

This surgical operation requires a large incision in the lesion site, as well as a large scar, the surgical effect was not very high.

Therefore, recently, various methods for treating without performing the above surgical operation have been disclosed, one of them is a method using a stent using a superelastic shape memory alloy.

This stent (5) is a hollow cylindrical body (3) having a certain length and weave a plurality of spaces (2) by weaving while crossing the superelastic shape memory alloy material at different positions as shown in the accompanying drawings Consists of, but both ends are provided to have a plurality of curved shapes at regular intervals, inserting into the lesion site of the body in a minimized state of the volume of the stent (5) while the shape is restored to its original state It is to be pushed out to expand.

Of course, the shape of the stent (5) can be configured in addition to the shape of Figure 1 as well as of course, it is natural that the volume to be restored to its original form in a minimized or minimized state.

Insertion apparatus for inserting the stent (5) as the lesion of the body, as described in the Patent Application Publication No. 2001-18324 filed by the applicant, the front and rear movement operation of the pressure wire is fixed to one end The flexible outer tube of the hollow body is connected to the front of the working connector in which the cable is built, and the front end of the pressurized wire has a moving tube which moves forward and backward in the outer tube, and the end of the moving tube has an insertion end at the end. Connect the insertion tube to be formed, the insertion tube in a position spaced a certain distance from the insertion end is made by connecting the fixed chamber fixed to one side.

This inserting device is mounted in the outer tube with the volume minimized while weaving and pulling the rear end of the stent using a fixing chamber while the stent is inserted into the insertion tube.

In this state, since the insertion device is inserted to the lesion site and the handle is pushed, the pressure wire, the moving tube, and the insertion tube are pushed so that the insertion tube comes out of the outer tube.

As the insertion tube is pushed out of the outer tube as described above, the stent mounted on the insertion tube is pushed out and expanded in its original form, pushing the lesion outwards and being installed in close contact.

In particular, the insertion device is the rear end of the stent is woven in the fixing chamber, when the installation position of the stent is incorrectly selected by pulling the stent together with the insertion tube to the original position back to the inside of the outer tube, and then install the installation position again It has a feature that can be.

However, the above-described conventional insertion apparatus has been very difficult to accurately install the stent insertion position to the exact center of the lesion position or the position required by the operator.

Of course, the operator can adjust the installation position of the stent while inserting and adjusting the insertion device as described above, but it is difficult to accurately position the stent to the exact center of the lesion or the position required by the operator by adjusting the installation position as described above. Of course, the process of adjusting the installation position was very inconvenient.

Therefore, the conventional insertion device is difficult to install the stent to the optimal position of the lesion site or the position required by the operator because the operator adjusts the insertion position of the stent, so the stent is separated from the lesion site requires re-operation. To cause additional problems.

The present invention has been made to solve the problems of the prior art as described above, by providing a simple and accurate insertion and installation of the stent to the optimal position of the lesion site of the body to provide excellent workability and operability. There is a purpose.

The purpose of the present invention, the insertion of the moving tube into the outer tube, the connecting tube is connected to the front end of the moving tube, the installation of the stent between the connecting tube and the outer tube to be inserted into the lesion site, the connection A thread hole is formed in the center portion of the tube to insert one side of the plurality of fixing chambers in a ring shape so as to support the wire by inserting the inside of the connection tube. It is achieved by a stent insertion device that penetrates outwards and wraps the outside of the stent in opposite directions to each other so as to be bundled and fixed to form a groove on the outside and attached to the connection tube.

1 is a front view showing an example of a stent.

Figure 2 is a partially cut-away configuration showing the insertion device of the present invention.

Figure 3 is a block diagram showing a process for mounting the stent in the insertion apparatus of the present invention.

4 to 6 is an operating state showing the process of inserting the stent into the lesion by the insertion device of the present invention.

7 is a main portion excerpt showing another embodiment of the present invention.

8 and 9 is a reference diagram showing a variety of stent insertion installation example according to the present invention.

* Description of the symbols for the main parts of the drawings *

5: stent 6: groove

12: moving tube 22: outer tube

25: connecting tube 26: insertion end

30,30 ': Fixed room 35: Wire

Hereinafter, a preferred embodiment for achieving the above object of the present invention will be described in detail with reference to the accompanying drawings.

That is, the stent insertion device of the present invention, as shown in Figure 2 and 3,

A moving tube 12 having a handle 10 fixed to one side is inserted and installed to move forward and backward within the outer tube 22 in front of the connector 20, and the end of the moving tube 12 is inserted into the end. The connecting tube 25 to form a stage (26) is connected, the hollow cylindrical body (3) to form a plurality of spaces (2) by weaving a material between the connecting tube 25 and the outer tube (22) In installing the stent (5) to minimize the diameter to insert into the lesion area 100,

Seal hole 25a is formed in the center of the connection tube 25 to insert one side of the plurality of fixing chambers 30 and 30 'in the form of a ring 31 so that the handle 10 outside the connection tube 25. Insert and support the wire 35 protruding to extend to,

The other sides of the plurality of fixing chambers 30, 30 ′ penetrate outward through the space portion 2 on the stent 5 to be positioned at the center of the lesion site 100, so that the outside of the stent 5 is opposite to each other. Since it wraps and tightens, it is bundled to fix the groove 6 to the outside and attached to the connection tube 25.

At this time, the thread hole 25a is formed in a long hole as shown in FIG. 7 to adjust the position at which the bundle is fastened by enclosing and fixing the stent 5 by the fixing chambers 30 and 30 '.

In addition, the other side of the fixing chamber (30, 30 ') is fixed to one side fixing chamber 30 by tying the stent (5) cut to reduce the volume and attach only the other fixing chamber (30') to the connecting tube (25) Done.

In addition, the plurality of fixing chambers 30 and 30 'penetrate outwards through the same space 2 of the stent 5 to bundle and fix the outside of the stent 5 in a reverse direction. Again, it is attached to the outer periphery or the inner periphery on the connecting tube 25 through the same space (2) of the stent (5).

In addition, since the wire 35 is not installed in a straight line, it is preferable to secure a certain degree of flexibility as in the above-described tube.

As indicated, 11 denotes a guidewire passing tube inserted into the connecting tube 25 and the moving tube 12 and protruding through the insertion end 26.

Next will be described the operation and action of the present invention as described above.

First select a suitable stent (5) length and diameter according to the size or length of the lesion site (100).

In this state, the stent 5 is mounted to the insertion apparatus, which is a ring hole 25a at the center of the connection tube 25 as shown in FIG. After forming and inserting 31, the wire 35 inserted between the guide wire passing tube 11 and the connecting tube 25 is supported by the ring 31.

In this state, the stent 5 is inserted into the outside of the connecting tube 25, and the other side of the fixing chamber 30, 30 ′ is moved outward through the same space 2 of the artificial vessel stent 5. The other side of the fixing chamber (30) (30 ') in the protruding state to penetrate through the bundle in order to tighten so as to wrap in the opposite direction to each other so as to minimize the volume of the stent (5) of the bundled portion so that the lesion site 100 is located It is to form a groove 6 for.

At this time, it is preferable that the groove 6 of the stent 5 formed by the fixing chambers 30 and 30 'is generally formed to be located at the center of the stent 5. This is to prevent the stent from being detached from the lesion site by fitting the center to the lesion site 100.

In the above state, the fixing chambers 30 and 30 'cut at one end of the fixing chamber to reduce volume, and the other fixing chamber ends are formed in the same space portion through which the fixing chambers 30 and 30' pass. 2) and reinserted to attach to the connecting tube (25).

In this state, while inserting into the outer tube 22 together with the connecting tube 25 while minimizing the overall volume of the stent (5).

In this manner, when the preparation for mounting the stent 5 is completed, the outer tube 22 is inserted and positioned up to the front of the lesion site 100 in the vessel based on angioplasty (see FIG. 4).

In this state, when the outer tube 22 is pulled together with the connector 20 while holding the handle 10, the connecting tube 25 and the stent 5 in the outer tube 22 come out of the outer tube 22. .

As such, the stent 5 pushed out of the outer tube 22 is expanded and returned to its original shape.

As described above, the stent 5 to be expanded and returned is inserted into the groove 6 formed by being tied to tighten the fixing chambers 30 and 30 'around the outer circumference of the center thereof so that the center of the lesion site 100 is positioned.

As a result, the stent 5 is pushed out of the outer tube 22 in the vicinity of the lesion part 100 and expanded, and the groove part 6 formed at the center thereof is inserted into the center of the lesion part. It will be located in position (see Figure 5).

In this manner, when the stent 5 is installed in the position of the lesion part 100, the hook 31 at the end of the fixing chamber 30, 30 ′ is pulled out by pulling the wire 35 in the connection tube 25. Since the support is released, the fixing chamber 30, 30 ′ releases the support of the center portion of the stent 5, and the center portion of the stent 5 is expanded in its original state to be in close contact with the lesion portion 100 and pushed outward. To expand it (see Figure 6).

At this time, the fixing chambers 30 and 30 'penetrate through the same space portion 2 of the stent 5 and are drawn out to the outside. By attaching to the connection tube 25 through the expansion, the stent 5 expands without interfering with the fixing chamber 30, 30 ', in particular, the fixing chamber 30, 30' tied to and fixed to each other. The return operation can be performed smoothly.

Meanwhile, the present invention can be implemented differently as shown in FIG. 8, which is fixed chambers 30, 30 ′, 30, 30 ′ when the lesion parts 100 and 100 are formed in two adjacent places. ) Is provided at two positions of the lesion site and is bundled to tighten while surrounding the outside of the stent 5 at the location thereof, so that the grooves 6 and 6 are formed at two locations, so that the plurality of lesion sites 100 and 100 are formed. It is for easy and accurate installation.

In this case, the installation process is the same as using the pair of fixing chambers 30 and 30 'described above.

In addition, in the present invention, when the stent is to be inserted into a position biased toward one side rather than the center of the stent 5 on the position of the lesion site 100, the fixation chamber to the position of the lesion site 100 as shown in FIG. (30) (30 ') is to wrap around the stent (5) to form a groove (6), so as described above, the groove (6) is located in the center of the lesion site 100 in the installation process, the operator Will be able to insert and install the stent (5) to the exact position required.

As described in detail above, in the present invention, the stent is attached to the position of the stent to be positioned at the center of the lesion site by using a plurality of fixation chambers while being bound to tighten while wrapping the stent. By inserting the stent into the center of the lesion site by the groove portion formed by the portion tied to the fixing chamber at the time of insertion, the stent can be easily and accurately inserted and thus has the effect of providing excellent workability and operability.

Claims (3)

A moving tube 12 having a handle 10 fixed to one side is inserted and installed to move forward and backward within the outer tube 22 in front of the connector 20, and the end of the moving tube 12 is inserted into the end. The connecting tube 25 to form a stage (26) is connected, the hollow cylindrical body (3) to form a plurality of spaces (2) by weaving a material between the connecting tube 25 and the outer tube (22) In installing the stent (5) to minimize the diameter to insert into the lesion area 100, Seal hole 25a is formed in the center of the connection tube 25 to insert one side of the plurality of fixing chambers 30 and 30 'in the form of a ring 31 so that the handle 10 outside the connection tube 25. Insert and support the wire 35 protruding to extend to, The other sides of the plurality of fixing chambers 30, 30 ′ penetrate outward through the space portion 2 on the stent 5 to be positioned at the center of the lesion site 100 so that the outside of the stent 5 is opposite to each other. Stent inserting device for stenosis of the body, characterized in that the tightening to wrap so as to form a groove (6) to the outside to attach on the connecting tube (25). The method of claim 1, Stent insertion apparatus for the stenosis site of the body, characterized in that the seal hole (25a) is formed by the long hole. The method of claim 1, The plurality of fixing chambers 30 and 30 'penetrate outward through the same space 2 of the stent 5 to bundle and fix the outside of the stent 5 in a reverse direction to each other, and then fix the bundle again. Stent insertion device for the operation of the stenosis of the body, characterized in that made to attach to the outer periphery or the inner periphery on the connecting tube 25 through the same space (2) of the stent (5).