JP2022153326A - Tubular indwelling device - Google Patents

Abstract

To provide a tubular indwelling device capable of keeping the shape of a wire provided along the circumference of the end of a connection part.SOLUTION: A tubular indwelling device 1 indwelt in a biological lumen 2 comprises a tubular connection part 12 into which another tubular indwelling device 3a is inserted to be connected with another tubular indwelling device 3a mentioned above. The connection part 12 has an index member 21 provided at an end into which another tubular indwelling device 3a mentioned above is inserted. The index member 21 has a plurality of wires provided along the peripheral direction of the connection part 12, the wires constituted so as to be annular generally as a whole, in a state where the tubular indwelling device 1 is indwelt in the biological lumen 2.SELECTED DRAWING: Figure 3

Description

The present invention relates to a tubular indwelling device.

2. Description of the Related Art Tubular indwelling devices are conventionally known that are indwelled in a lesion site such as a stenotic site or an obstructed site in a biological lumen such as a blood vessel, and expand the diameter of the lesion site to maintain the patency of the biological lumen. there is Further, for example, a bifurcated tubular indwelling device is also known for indwelling in the abdominal aorta that branches to the left and right lower limbs (see, for example, Patent Document 1).

JP-A-2000-279532

This type of tubular indwelling device is housed in a tubular sheath, is introduced into a body lumen in a contracted state radially inward, is delivered to a lesion site, and then is released from the sheath and indwelled. Further, in the tubular indwelling device described above, a small-diameter tubular indwelling device (also referred to as a rim) for covering the branched blood vessel is inserted into and connected to the opening of the branched portion from the main body portion.

In the technique of placing the tubular indwelling device, it is important to correctly grasp the end position and opening state of the branch when connecting the rim to the branch. Therefore, in some cases, the branched portion of the tubular indwelling device is provided with an indicator member formed of, for example, a metal wire rod having imaging properties along the circumference of the end portion of the branched portion.

When the index member is provided at the branched portion, the tubular indwelling device is accommodated in the sheath so that the circumference of the index member contracts when introduced into the biological lumen. required to be restored to However, it is practically difficult to stably deform the metal wire index member so as to retain the shape before contraction after ejection.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a tubular indwelling instrument capable of retaining the shape of a wire provided along the circumference of the end of the connecting portion.

One aspect of the present invention is a tubular indwelling device to be indwelled in a living body lumen, comprising a tubular connecting part into which another tubular indwelling device is inserted and connected to the other tubular indwelling device. The connecting part has an index member provided at the end into which another tubular indwelling device is inserted. The indicator member has a plurality of wire rods provided along the circumferential direction of the connection part, and the plurality of wire rods are arranged to form a substantially annular shape as a whole when the tubular indwelling device is indwelled in the living body lumen. It is configured.

According to the present invention, the shape of the wire provided along the circumference of the end portion of the connecting portion can be maintained.

It is a figure which shows the structural example of the stent graft of this embodiment. FIG. 4 is a diagram schematically showing a state in which a stent graft is indwelled in a blood vessel; It is the perspective view which looked at the 1st branch part from the other end side. It is a figure which shows the surrounding surface by the side of the other end of a 1st branch part. It is a schematic diagram which shows the cross section of the other end side of a 1st branch part. FIG. 4 is a diagram showing the shape of the sheet before sewing the membrane portion; It is the perspective view which looked at the 1st branch part in the 1st modification from the other end side.

Hereinafter, configuration examples of tubular indwelling devices according to embodiments of the present invention will be described with reference to the drawings.
Here, the shape, dimensions, etc. of each part in the drawings are shown schematically, and do not represent the actual shape, dimensions, etc. In the drawings, the axial direction Ax of the member is indicated by an arrow as required. A direction substantially orthogonal to the axial direction Ax is defined as a radial direction. In the drawings, one end side of the member is denoted by symbol F as required, and the other end side opposite to the one end side is denoted by symbol B as required.

FIG. 1 is a diagram showing a configuration example of a stent graft 1 of this embodiment, and FIG. 2 is a diagram schematically showing a state in which the stent graft 1 is indwelled in a blood vessel 2. As shown in FIG.

The tubular indwelling device of the present embodiment is applied to be indwelled in a lesion site of a blood vessel (for example, a site where an aneurysm occurs in a blood vessel), which is an example of a biological lumen, and to block blood flow to the lesion site. Stent graft 1; A stent graft 1 in this embodiment is indwelled in a blood vessel 2 such as an abdominal aorta that branches to the left and right lower limbs, as shown in FIG.

The overall shape of the stent graft 1 is a tubular shape with the other end branched into two. The stent graft 1 has a tubular body portion 11 open at one end, and tubular first and second branch portions 12 and 13 branching from the other end of the body portion 11 and extending therefrom. The first and second branch portions 12, 13 are examples of connecting portions.

The other end sides of the first and second branch portions 12 and 13 are respectively opened. The openings of the main body 11 and the openings of the first and second branches 12, 13 communicate with each other, and the stent graft 1 in an indwelling state forms a tubular channel therein through which the patient's blood passes.
Also, the diameters of the first and second branch portions 12 and 13 are smaller than the diameter of the body portion 11 . The axial length of the first branch 12 is shorter than the axial length of the second branch 13 .

A bare portion 14 made of a metal skeleton is provided on one end side of the main body portion 11 . The bare portion 14 protrudes outward from an opening on one end side of the main body portion 11 . The bare portion 14 produces friction with the inner wall of the blood vessel 2 when the stent graft 1 is indwelled, and has a function of suppressing misalignment (migration) of the stent graft 1 .

Here, the stent graft 1 of this embodiment is introduced into the blood vessel 2 in a radially inward contracted state (not shown) using a catheter (not shown). The stent graft 1 is released from the sheath of the catheter after being delivered to the lesion site 2a within the blood vessel 2 and expands radially outward.
The stent graft 1 released from the catheter may be expanded radially outward by expanding a balloon (not shown) from the inside and pressing. Indwelling of the stent graft 1 blocks blood flow to the lesion site 2a formed in the branching blood vessel 2. FIG.

After the stent graft 1 is indwelled, stent grafts for covering the branched blood vessels 2 (left and right iliac arteries) are placed in the first and second branch portions 12, 13 of the stent graft 1, as shown in FIG. (rims 3a, 3b) are connected respectively. The rims 3a, 3b are an example of another tubular indwelling device and have diameters corresponding to the first and second branches 12,13. By inserting and connecting limbs 3a and 3b to first and second branch portions 12 and 13 of stent graft 1 respectively, blood flow from the upstream side to the downstream side of branched blood vessel 2 is blocked. Therefore, the inflow of blood to the lesion site 2a can be suppressed.

The limbs 3a, 3b are introduced into the blood vessel using a catheter, similar to the stent graft 1. For example, when connecting the rim 3a to the first branch 12, a guide wire (not shown) is passed through the first branch 12, and the catheter containing the rim 3a is passed along the guide wire in the blood vessel 2. proceed. When releasing the rim 3a from the sheath, the catheter is placed so that one end of the rim 3a overlaps with the first branch 12 in the axial direction, and then the sheath is pulled out toward the other end to remove the rim 3a. Extend outward. As a result, the first branch portion 12 and the rim 3a are connected, and the rim 3a is indwelled so as to cover the branched blood vessel 2 from the inside.

Moreover, the main body portion 11 and the first and second branch portions 12 and 13 of the stent graft 1 each have a skeleton portion 15 and a coating portion 16 .

The skeleton portion 15 is a self-expanding stent skeleton configured to be deformable from a contracted state contracted radially inward to an expanded state expanded radially outward. In this embodiment, the skeletal portion 15 is composed of a plurality of tubular skeletal pieces formed of thin metal wires that are zigzag-folded along the circumferential direction of the stent graft 1 . The skeleton pieces of the skeleton portion 15 are arranged side by side along the axial direction Ax. Adjacent skeleton pieces may be connected by a connecting member (not shown).

Examples of the material of the fine metal wire forming the framework 15 include known metals and metal alloys represented by stainless steel, nickel-titanium alloys, cobalt-chromium alloys, and titanium alloys. When a nickel-titanium alloy is used as the material of the skeleton 15, the shape of the expanded state can be memorized in the skeleton 15 by applying a predetermined heat treatment after arranging each part into the shape of the expanded state. Note that the skeleton portion 15 may be made of a material other than metal (for example, ceramic, resin, or the like).

The configuration of the skeleton portion 15 is not limited to the above. For example, the skeleton portion 15 may be formed by spirally winding a thin metal wire that is bent in a zigzag shape. Alternatively, the frame portion 15 may be formed by laser-cutting a thin cylindrical body made of any of the metals described above.

The coating portion 16 is a tubular flexible film body that forms the above-described tubular flow path, and is attached to the skeleton portion 15 so as to block the gap portion of the skeleton portion 15 . Examples of the material of the coating portion 16 include fluororesins such as PTFE (polytetrafluoroethylene) and polyester resins such as polyethylene terephthalate.

As shown in FIGS. 6(a) and 6(b), the coating portion 16 is composed of a front side sheet 17a and a back side sheet 17a which are cut out in accordance with the shapes of the body portion 11 and the first and second branch portions 12 and 13. A three-dimensional cylindrical body is formed by sewing the sheet 17b. Each of the sheets 17a and 17b constituting the coating portion 16 has corresponding portions 12a and 12b of the first branch portion and corresponding portions 13a and 13b of the second branch portion with respect to the corresponding portions 11a and 11b of the body portion. It is cut out so that the angle to make is open. In other words, the corresponding portions 12a and 12b of the first branch and the corresponding portions 13a and 13b of the second branch are not cut out linearly so as to be parallel to each other. If a sheet obtained by linearly cutting the corresponding portions 12a and 12b of the first branch portion and the corresponding portions 13a and 13b of the second branch portion is used, the first branch portion 12 and the second branch portion can be formed after sewing. Branches 13 may cross inward. On the other hand, if sheets 17a and 17b as shown in FIG. 6 are used, it is possible to prevent the first branched portion 12 and the second branched portion 13 from intersecting inward after sewing.

The coating portion 16 in this embodiment is attached to the inner peripheral side of the skeleton portion 15 . However, the coating portion 16 may be attached to the outer peripheral side of the skeleton portion 15, and the skeleton portion 15 may be sandwiched between the inner peripheral side and the outer peripheral side using the two coating portions 16. FIG. The method of fixing the film portion 16 to the skeleton portion 15 may be, for example, sewing with thread, adhesion, welding, or sticking with tape or the like.

FIG. 3 is a perspective view of the first branch portion 12 viewed from the other end side. FIG. 4 is a diagram showing the peripheral surface of the other end side of the first branch portion 12. As shown in FIG. FIG. 5 is a schematic diagram showing a cross section of the other end side of the first branch portion 12. As shown in FIG.

A gate marker 21 , which is an example of an index member, is provided at the open end on the other end side of the first branch portion 12 . The gate marker 21 is composed of a plurality of wires having contrast properties. Each wire constituting the gate marker 21 is arranged along the circumferential direction of the first branch portion 12 . In this embodiment, the gate marker 21 is composed of three wire rods obtained by dividing the circumference into three. The number of wires of the gate marker 21 may be two, or may be four or more.

As shown in FIGS. 3 and 5, in the indwelling state of the stent graft 1, the plurality of gate markers 21 as a whole form a substantially annular shape. By arranging the gate marker 21 at the open end of the first branch 12 in this way, the position and shape of the end of the first branch 12 can be observed from the outside using an X-ray image. It becomes possible.

A material of the gate marker 21 is, for example, a metal such as tungsten, platinum, or stainless steel, which has high biocompatibility and contrast enhancement. However, the material of the gate marker 21 is not limited to the above, and a biocompatible metal material can be applied.

At the end of the first branch portion 12, the film portion 16 is folded back from the inside to the outside, and each gate marker 21 is wrapped inside the folded portion of the film portion 16 and arranged. As shown in FIG. 5 , at the end of the first branch portion 12 , the gate marker 21 is arranged between the inner peripheral coating portion 16 and the folded outer peripheral coating portion 16 in the radial direction. .

As shown in FIG. 4 , on the outer circumferential surface of the first branch portion 12 along the circumferential direction, the skeleton portion 15 located on the farthest other end side of the first branch portion 12 is axially aligned with the gate marker 21 . It is spaced apart in the direction and arranged so as not to overlap the gate marker 21 . At the end of the first branch portion 12 , the skeleton portion 15 facing the gate marker 21 is positioned radially outward of the coating portion 16 on the outer peripheral side and sewn to the outside of the coating portion 16 . Further, the gate marker 21 is sewn to the tip of the trough portion 15a of the skeleton portion 15 protruding toward the other end while being wrapped in the film portion.

As described above, the frame portion 15 facing the gate marker 21 and the gate marker 21 are indirectly connected via the peripheral surface of the coating portion 16 while being spaced apart in the axial direction. Therefore, the gate marker 21 wrapped in the film portion 16 can slide in the circumferential direction with respect to the skeleton portion 15 .

Next, the movement of the gate marker 21 when the first branch portion 12 expands and contracts will be described.
When the first branch portion 12 is contracted in the radial direction, the skeleton portion 15 is contracted in the radial direction by displacing the adjacent peak portions 15b and the adjacent valley portions 15a closer to each other in the circumferential direction. Then, the gate marker 21 connected to the trough portion 15a of the skeleton portion 15 via the coating portion 16 is also displaced so as to shrink in the radial direction as a whole in conjunction with the skeleton portion 15 .

When the first branch portion 12 contracts, the three gate markers 21 move closer together in the circumferential direction, and adjacent gate markers 21 in the circumferential direction partially overlap each other. In this manner, each gate marker 21 moves in the circumferential direction and overlaps with each other, thereby being displaced into a radially contracted shape. In this embodiment, since the gate marker 21 is divided into a plurality of parts in the circumferential direction, it is possible to easily ensure the deformation margin of the gate marker 21 during contraction.

At this time, each gate marker 21 wrapped in the film portion 16 can slide in the circumferential direction with respect to the skeleton portion 15 . That is, when the skeleton portion 15 is reduced in diameter, the connection position of the gate marker 21 with the skeleton portion 15 can be moved in the circumferential direction. Therefore, when the diameter of the skeleton portion 15 is reduced, the gate markers 21 are restrained by the skeleton portion 15 and are prevented from deforming irregularly in the axial direction, and the gate markers 21 maintain their shape extending along the circumferential direction. can.

On the other hand, when the first branch portion 12 expands in the radial direction, the skeleton portion 15 self-expands by being displaced such that the adjacent peak portions 15b and the adjacent valley portions 15a are separated from each other in the circumferential direction. Then, the gate marker 21 connected to the trough portion 15 a of the skeleton portion 15 via the coating portion 16 is also displaced so as to expand in the radial direction as a whole in conjunction with the skeleton portion 15 .

When the first branch 12 expands, the circumferentially partially overlapped gate markers 21 move apart circumferentially. Since the gate markers 21 when contracted retain their shape extending along the circumferential direction, the gate markers 21 adjacent in the circumferential direction can be moved without interfering with each other during the above movement. can be easily restored to its original shape. As described above, the gate marker 21 can be stably deformed from a contracted state to an expanded state, and can maintain a substantially annular shape as a whole when expanded.

The effects of the stent graft 1 of this embodiment will be described below.
In this embodiment, the stent graft 1 (tubular indwelling device) to be indwelled in the blood vessel 2 (biological lumen) has a tubular first end into which a rim 3a (another tubular indwelling device) is inserted and connected to the rim 3a. It has one branch 12 (connection). The first branch 12 has a gate marker 21 (index member) provided at the end into which the rim 3a is inserted. The gate marker 21 has a plurality of wire rods provided along the circumferential direction of the first branch portion 12 , and the plurality of wire rods has a substantially annular shape as a whole when the stent graft 1 is indwelled in the blood vessel 2 . is configured to form
By configuring the gate marker 21 with a plurality of wire rods provided along the circumferential direction of the first branch portion 12, the wire rods can move in the circumferential direction and overlap each other during contraction. During expansion, the wire moves in the circumferential direction, so that the overall shape can be restored to a substantially annular shape. Therefore, according to this embodiment, the shape of the gate marker 21 provided along the circumference of the end of the first branch portion 12 can be maintained.

The first branch portion 12 of the present embodiment is provided axially away from the gate marker 21, and includes a skeleton portion 15 that can be expanded and contracted in a radial direction that is substantially orthogonal to the axial direction, and a first branch portion. A film portion 16 (peripheral surface portion) provided along the circumferential direction of the portion 12 and provided so as to cover the skeleton portion 15 is further provided. The gate marker 21 and the skeleton portion 15 are connected via the coating portion 16 .
By connecting the gate marker 21 and the skeleton part 15, the expansion force when the skeleton part 15 expands and deforms is transmitted to the gate marker 21, and the gate marker 21 is displaced in conjunction with the expansion deformation of the skeleton part 15. be able to. As a result, the shape of the wire material of the gate marker 21 provided along the circumference of the end of the first branch portion 12 can be maintained while the stent graft 1 is left in the blood vessel 2 .
Moreover, the gate marker 21 can slide with respect to the skeleton portion 15 by connecting the gate marker 21 and the skeleton portion 15 via the film portion 16 . This prevents the gate marker 21 from being restrained by the skeleton portion 15 and irregularly deformed in the axial direction when the skeleton portion 15 is contracted in diameter. As a result, the shape of the gate marker 21 extending along the circumferential direction can be maintained even when contracted, and the gate marker 21 can be stably deformed.

The present invention is not limited to the above embodiments, and various improvements and design changes may be made without departing from the scope of the present invention.

In the above embodiment, an example in which the gate marker 21 is provided in the first branch portion 12 of the stent graft 1 has been described. However, the gate marker 21 may be similarly provided at the open end of the second branch portion 13 .

Further, in the above-described embodiment, the gate marker 21 and the skeleton portion 15 are connected via the film portion 16, but the configuration in which the gate marker 21 and the skeleton portion 15 are connected is an example and is limited to this. It can be changed arbitrarily as appropriate. For example, the gate marker 21 and the skeleton portion 15 may be connected using a member (not shown) other than the coating portion 16 provided along the circumferential direction of the first branch portion 12 .

Further, in the above embodiment, the bifurcated stent graft 1 to be indwelled in the abdominal aorta was exemplified as the tubular indwelling device, but the shape of the tubular indwelling device is only an example and is not limited to this. , may be in the form of a straight cylinder. In other words, the tubular indwelling device may have any shape as long as it has a tubular connecting portion into which another tubular indwelling device is inserted and connected to the other tubular indwelling device.

Further, in the above-described embodiment, a configuration using a plurality of wire rods having contrast properties as gate markers has been shown, but the configuration of the gate marker applied to the tubular indwelling device is not limited to this. For example, as a modification of the above embodiment, a gate marker having the following configuration may be applied to a tubular indwelling device. In addition, in the description of the modification below, the same reference numerals are given to the configurations common to the above-described embodiment, and redundant description is omitted.

FIG. 7 is a perspective view of the first branch portion 12 in the first modified example as seen from the other end side. The gate marker of the first modified example is composed of a coil member 22 which is formed by winding a wire having contrast properties into a cylindrical shape at a predetermined pitch. The coil member 22 is formed by winding a thin wire to form a large-diameter coil with a gap. Therefore, compared to the case where the gate marker is directly formed with a wire material having the same diameter as the outer diameter of the coil, the coil member 22 has a smaller amount of metal while ensuring visibility in an X-ray image, thereby reducing the filling rate in the sheath. can be reduced. In addition, since the coil member 22 is formed of a wire material having a diameter smaller than the coil outer diameter, it is more likely to bend than when the gate marker is directly formed of a wire material having the same diameter as the coil outer diameter. Also, the coil member 22 can relatively easily transition from a bent state to a state before bending due to the restoring force of the coil.

In the example of FIG. 7, three coil members 22 are arranged at the open end on the other end side of the first branch portion 12 . Each coil member 22 extends along the circumferential direction of the first branch portion 12 and is arranged so that adjacent coil members 22 do not overlap each other. Further, each coil member 22 is sewn to the distal end side of the trough portion 15a of the skeleton portion 15 projecting to the other end side while being wrapped in the coating portion 16 . As a result, the three coil members 22 as a whole form a substantially annular shape in the indwelling state of the stent graft 1 . The number of coil members 22 may be two, or may be four or more.

Also, the material of the coil member 22 is, for example, a metal such as tungsten, platinum, or stainless steel, which is highly biocompatible and highly contrast-enhancing. However, the material of the coil member 22 is not limited to the above, and a biocompatible metal material can be applied.

Here, when the first branch portion 12 is contracted in the radial direction, the skeleton portion 15 is contracted in the radial direction by displacing the adjacent peak portions 15b and the adjacent valley portions 15a closer to each other in the circumferential direction. do. Then, the coil member 22 held by the coating portion 16 is deformed so as to be folded as the skeleton portion 15 is displaced, corresponding to the contracted state of the first branch portion 12 . At this time, the coil member 22 may extend in the axial direction of the coil when part of the coil is bent. In addition, by dividing the coil member 22 into a plurality of parts in the circumferential direction of the first branch portion 12 , a deformation margin is secured between the coil members 22 . Therefore, the coil member 22 is prevented from being excessively stretched and plastically deformed during contraction.

On the other hand, when the first branch portion 12 expands in the radial direction, the skeleton portion 15 self-expands by being displaced such that the adjacent peak portions 15b and the adjacent valley portions 15a are separated from each other in the circumferential direction. Then, the coil member 22 approaches the state before bending from the folded state due to the restoring force of the coil member 22 itself. In addition, each coil member 22 held by the coating portion 16 is arranged in a substantially annular position as a whole by the movement of the coating portion 16 interlocked with the skeleton portion 15 . As described above, the coil member 22 can be stably deformed from a contracted state to an expanded state, and can maintain a generally annular shape as a whole when expanded.

Further, in the first modified example, it is preferable to determine the combination of the wire diameter and the pitch width of the coil member 22 in consideration of X-ray visibility and sheath filling rate. For example, if the wire diameter is reduced or the pitch width is increased, the sheath filling rate is lowered, but on the other hand, the visibility in the X-ray image is lowered. Further, if the wire diameter is increased or the pitch width is decreased, the visibility in the X-ray image is improved, but on the other hand, the filling rate of the sheath is also increased.
Although not particularly limited, for example, the wire diameter of the coil member 22 is preferably about 0.0075 mm to 0.060 mm. Further, for example, the pitch width of the coil members 22 is preferably about 0.046 mm to 3.0 mm.

Further, as a second modification, although not shown, a plurality of gate markers arranged along the circumferential direction of the first branch portion 12 may be formed in a flat line shape. In the case of the second modification, flattening reduces the cross-sectional dimension (thickness of the gate marker) in the transverse direction, making the gate marker more likely to bend. Therefore, it is easy to fold the gate markers during contraction. In addition, since the dimension in the longitudinal direction of the cross section (the width of the gate marker) is increased by flattening, the visibility of the gate marker in the X-ray image can be ensured. Furthermore, by suppressing the cross-sectional area of the gate marker by flattening, it is possible to suppress the amount of metal in the gate marker and reduce the filling rate of the sheath.
In addition, when the gate marker is flattened, the material of the gate marker may be the same material as described above, for example, a flat marker made of gold (Au) may be used.
Further, the flat line-shaped gate marker may be formed in a coil shape as in the first modification, thereby increasing the degree of freedom in the orientation of the imaging means with respect to the gate marker when imaging an X-ray image. In addition, the visibility of the X-ray image can be further improved.

As a third modification, although not shown in the drawings, the diameter of a plurality of gate markers arranged along the circumferential direction of the first branch portion 12 may be changed at regular intervals along the circumferential direction. good. For example, the portion of the gate marker corresponding to the trough portion 15a of the skeleton portion 15 is made small in diameter, and in the small-diameter portion, interference between the trough portion 15a of the skeleton portion 15 and the gate marker is suppressed and the amount of metal in the gate marker is reduced. In addition, the visibility in the X-ray image can be ensured at the large-diameter portion of the gate marker.

Further, as a fourth modification, although not shown, the shape of a plurality of gate markers arranged along the circumferential direction of the first branch portion 12 is changed along the valley portion 15a and the peak portion 15b of the skeleton portion. It may be formed in a wavy line shape. In the fourth modification, interference with the skeleton portion 15 can be avoided by forming the shape of the gate marker in a wavy line shape. Further, in the case of the fourth modification, it is also possible to provide a gate marker between the skeleton parts. When the gate marker is provided between the skeleton parts, it is not necessary to fold back the coating part 16 for holding the gate marker, so the filling rate of the sheath can be reduced.

In addition, the embodiments disclosed this time should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning of equivalents to the scope of the claims.

1 Stent graft (tubular indwelling device), 2 Blood vessel (biological lumen), 2a Lesion site, 3a, 3b Rim (another tubular indwelling device), 11 Main body, 12 First branch ( Connection portion), 13 Second branch portion 14 Bare portion 15 Skeleton portion 16 Coating portion 17a, 17b Sheet 21 Gate marker (index member) 22 Coil member

Claims (5)

A tubular indwelling device to be indwelled in a biological lumen,
comprising a tubular connecting part into which another tubular indwelling device is inserted and connected to the other tubular indwelling device;
the connecting part has an indicator member provided at the end into which the other tubular indwelling device is inserted;
The indicator member
A plurality of wire rods are provided along the circumferential direction of the connecting portion, and the plurality of wire rods are formed in a substantially annular shape as a whole in a state in which the tubular indwelling device is indwelled in the living body lumen. A configured tubular indwelling device. The connecting part is
a skeletal portion that is axially spaced apart from the indicator member and that is expandable and contractible in a radial direction substantially orthogonal to the axial direction;
a peripheral surface portion provided along the peripheral direction of the connection portion,
The tubular indwelling device according to claim 1, wherein the index member and the skeleton are connected via the peripheral surface. The connecting part is
further comprising a film portion provided to cover the skeleton portion;
3. The tubular indwelling device according to claim 2, wherein the coating portion comprises the peripheral surface portion. The index member has a plurality of coil members formed by winding the wire into a cylindrical shape, and the plurality of coil members are substantially annular as a whole when the tubular indwelling device is indwelled in the living body lumen. The tubular indwelling device according to any one of claims 1 to 3, which is configured to form a cylindrical main body;
a plurality of cylindrical branch portions branching and extending from one end of the main body,
2. The tubular indwelling device according to claim 1, wherein at least one of said plurality of branched portions is provided with said connecting portion.

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