JP2012192018A - Stent graft delivery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wire material at the end of a stent graft from being largely curved.SOLUTION: The stent graft delivery device 10 includes: a sheath 14 for internally storing the stent graft 100 in a bent state; and a shaft 20 extending in the axial direction of the sheath 14 inside the sheath 14. The shaft 20 includes a guide part 26 for guiding top parts 102a, 102a to be curved by prescribed curvature, which are curved inward in the axial direction of the graft 106 by bending the wire material 102 at the end.

Description

  The present invention relates to a stent graft delivery device that folds and conveys a stent graft.

  Conventionally, a minimally invasive treatment using a stent graft (an artificial blood vessel with a stent) has been performed in order to improve a stenosis portion or an occlusion portion generated in a body lumen such as a blood vessel (for example, see Patent Document 1). In a treatment method using a stent graft (stent graft insertion), for example, a stent graft delivery device (hereinafter also simply referred to as a delivery device) such as a catheter is used to deliver the stent graft into a living body lumen, and the stent graft is placed at a desired indwelling position. Angioplasty is performed by inserting and indwelling. In this case, the delivery device performs delivery of the stent graft by folding and storing the stent graft on the inner peripheral surface of the tubular sheath.

  In particular, as a stent graft used for the treatment of an aortic aneurysm or aortic dissection, as shown in FIG. 4A, an annular skeleton (a plurality of metal wires 102 and 102 ′ arranged as shown in FIG. In many cases, a graft (tube body) 106 is attached to a ring stent 104). In this specification, reference numeral 102 denotes a wire positioned at the end of the ring stent 104, and reference numeral 102 'denotes another wire sandwiched between the ends of the wire 102.

US Pat. No. 6,740,111

  By the way, when the stent graft 100 is housed in the sheath, by bending the ring stent 104 (the annular wires 102 and 102 '), the wires 102 and 102' are deformed into a wave shape as shown in FIG. 4B. In this case, the bent end portion of the wire 102 has a pair of apexes (hereinafter also referred to as valleys) 102a and 102a that are curved inward in the axial direction of the stent graft 100, and a pair that is curved in the axially outer side. The top portions (hereinafter also referred to as peak portions) 102b and 102b are formed.

  The four top portions 102a, 102a, 102b, 102b formed on the wire 102 at the end portion are portions that are largely curved as compared with other portions of the wire 102 (the connecting portion 102c that connects the top portions), and compression strain (compaction) strain) becomes easier to concentrate. In this case, if a part of the top portion is extremely curved and a large compressive strain is applied, the end portion of the wire 102 may be deformed.

  In particular, in the wire 102 at the end of the stent graft 100, the graft 106 exists at the inner angle Rb of the peaks 102b and 102b that curve outward in the axial direction, while the valleys 102a and 102a curve inward in the axial direction. Since there is no graft 106 at the inner angle Ra, the valleys 102a, 102a are extremely curved, and a large compressive strain is likely to be applied. When the wire 102 at the end portion is deformed, the expansion force and durability of the stent graft 100 are lowered, and in the worst case, the stent graft 100 may be damaged.

  The present invention has been made in view of the above circumstances, and prevents a wire rod at the end of a stent graft from being greatly bent by a simple configuration, thereby stabilizing the expansion force and durability of the stent graft. Therefore, an object of the present invention is to provide a stent graft delivery device capable of delivering a good stent graft.

  In order to achieve the above object, the present invention is a stent graft delivery device comprising: a sheath that accommodates a stent graft in a bent state; and a shaft that extends in the axial direction of the sheath inside the sheath. The stent graft is configured to include an annular wire and a tube to which the wire is attached at least at one end, and the shaft is bent by bending the wire at the one end. A guide portion is provided that guides a top portion that curves inward in a direction so as to bend with a predetermined curvature.

  According to the above, since the top portion that is curved toward the inner side in the axial direction of the tubular body by bending the wire at one end is provided with the guide portion so as to have a predetermined curvature, the wire portion is provided by the guide portion. It is possible to prevent the top of the lens from being extremely curved. That is, the apex that curves toward the inner side in the axial direction is more likely to bend than the apex that curves toward the outer side in the axial direction, but extreme bending is prevented by the guide portion, and a large compressive strain is applied. It is suppressed. Accordingly, it is possible to stabilize the expansion force and durability of the stent graft delivered by the sheath, and it is possible to perform satisfactory delivery of the stent graft.

  In this case, an end tip having a diameter larger than the outer diameter of the shaft is provided on the tip side of the shaft, and the guide portion is integrally formed with the end tip, and the extending direction of the shaft It can be set as the structure which protrudes.

  Thus, by integrally forming the guide portion on the end tip on the distal end side of the shaft, the curvature of the top portion of the wire can be guided by the guide portion without increasing the number of parts. In addition, since the guide part protrudes in the extending direction of the shaft with respect to the conventional end chip, the shaft having the guide part can be easily manufactured without greatly changing the design of the shaft itself. Can be done.

  Moreover, it is preferable that the said guide part has a taper surface which becomes narrow toward the extending direction of the said shaft, and makes the wire rod of the said one end part bent contact | abut to the said taper surface.

  In this way, by bringing the bent wire rod at one end into contact with the taper surface, the wire rod can be entirely guided along the inclination of the taper surface, and an extra load due to the guide portion guidance is applied to the wire rod. Without bending, the degree of curvature of the wire can be set to a predetermined curvature.

  Further, if the guide portion is formed of a flexible synthetic resin material, the peripheral portion of the end tip can be moved flexibly, so that the end tip conforms to the shape of the inner wall of the living body lumen. Bend easily.

  Still further, it is preferable that the predetermined curvature be a curvature that substantially coincides with a curvature of a top portion that is bent toward the outside in the axial direction of the tubular body by bending the wire at the one end portion.

  In this way, the curvature of the apex that curves inward in the axial direction of the tubular body and the curvature of the apex that curves inward in the axial direction of the tubular body are substantially matched, so that the four formed on the wire by bending the stent graft The curved shapes of the top portions are equal, and the load (compression strain) applied to the four top portions in the bent state can be evenly dispersed. For this reason, a stent graft can be better accommodated in a sheath.

  According to the present invention, it is possible to prevent the wire rod at the end of the stent graft from being greatly bent by a simple configuration, thereby stabilizing the expansion force and durability of the stent graft, and delivering a good stent graft. Can do.

It is a whole lineblock diagram showing the stent graft delivery system provided with the stent graft delivery device concerning an embodiment of the invention. FIG. 2A is a partial perspective view schematically showing a distal end portion of the delivery device of FIG. 1, FIG. 2A is a diagram showing a state before storing a stent graft, and FIG. 2B is a diagram showing a stored state of the stent graft. FIG. 3 is a schematic explanatory view showing a state in which a stent graft is housed in the distal end portion of the delivery device of FIG. 1, FIG. 3A is a partial side sectional view, and FIG. 3B is a partial plan sectional view. FIG. 4A is a schematic side view of a stent graft accommodated in the stent graft delivery device of the present invention, FIG. 4A is a partial side view showing the expanded state of the stent graft, and FIG. 4B is a partial side view showing the accommodated state of the stent graft.

  Hereinafter, preferred embodiments of a stent graft delivery device (delivery device) according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall configuration diagram showing a stent graft delivery system (hereinafter also simply referred to as a system) 12 including a stent graft delivery device 10 according to an embodiment of the present invention. The system 12 according to the present embodiment is a medical device that is used for, for example, artificial blood vessel replacement surgery in the treatment of an aortic aneurysm or aortic dissection, and the stent graft 100 is inserted and placed in a desired living body lumen 50 (intravascular). Used for. That is, the system 12 is for delivering and deploying the stent graft 100 into the blood vessel by the delivery device 10.

  As shown in FIG. 1, the system 12 includes a stent graft 100 and a delivery device 10 that delivers the stent graft 100 into a biological lumen 50 by means of an elongated sheath 14. In the following description, unless otherwise specified, the right direction is referred to as the “base end (rear end)” direction and the left direction is referred to as the “front end” direction with reference to the extending direction of the sheath 14 shown in FIG. The same applies to other figures.

  First, the stent graft 100 delivered by the delivery device 10 will be specifically described with reference to FIG. The stent graft 100 includes an annular skeleton (ring stent 104) formed by arranging a plurality of annular wires 102 and 102 ', and a tubular graft (tubular body) 106 supported by the ring stent 104.

  The ring stent 104 is placed in the living body lumen 50 and supported in the second form (see FIG. 4A) from the first form (see FIG. 4B) that is folded and housed in the delivery device 10. ) Is configured as a self-expandable structure that can be expanded. The wire rods 102 and 102 ′ of the ring stent 104 have, for example, a self-expanding function by forming a wire made of a superelastic alloy in a ring shape or forming a ring made by laser cutting a pipe made of a superelastic alloy. Will have.

  Examples of superelastic alloys constituting the wires 102 and 102 'include, for example, Ti-Ni alloys, Ti-Ni-Fe alloys, Cu-Zn alloys, Cu-Zn-Al alloys, Cu-Al-Ni alloys. Cu-Au-Zn alloy, Cu-Sn alloy, Ni-Al alloy, Ag-Cd alloy, Au-Cd alloy, In-Ti alloy, In-Cd alloy, and the like. .

  On the other hand, the graft 106 is configured by forming a woven fabric (fabric) woven with resin threads such as PTFE, ePTFE (expanded polytetrafluoroethylene), and polyester into a tube shape. In this case, the graft 106 may use a hybrid material (hybrid artificial blood vessel) whose inner peripheral surface is coated with a biological material such as endothelial cells or proteins. Furthermore, a material formed by tissue engineering or genetic engineering can also be applied.

  The size and shape of the stent graft 100 are preferably selected according to the living body lumen 50 (the indwelling position of the indwelling target) and the treatment method. For example, if the outer diameter of the graft 106 is about 12 mm to 30 mm and the wall thickness is about 0.1 mm to 1 mm, it is suitable as a large-diameter tube for chest that is suitable for replacement with the aorta. On the other hand, the wire 102 (ring stent 104) is formed to have an outer diameter that can support the graft 106 in the expanded state (second form).

  Next, the delivery device 10 that delivers the stent graft 100 will be described. As shown in FIG. 1, the delivery device 10 includes a thin and long sheath 14, an operation portion 16 that accommodates the proximal end portion of the sheath 14 so as to be movable back and forth, and a hub provided on the proximal end side of the operation portion 16. 18, a shaft 20 that passes through the lumen 14 a (see FIG. 3) of the sheath 14, and an end tip 22 that is provided at the tip of the shaft 20.

  The sheath 14 is a tube extending a predetermined length in the distal direction from the proximal-side operation unit 16, and the distal end thereof is in contact with the contact surface 22 a of the end tip 22. A shaft 20 that extends in the axial direction integrally with the sheath 14 is disposed in the lumen 14 a of the sheath 14. Further, the above-described stent graft 100 is accommodated in the lumen 14 a at the distal end portion of the sheath 14. That is, the sheath 14 is configured to be stored and held in a state (first form) in which the stent graft 100 is bent by the inner peripheral surface of the distal end portion.

  The sheath 14 is moderately flexible and moderate so that the operator can smoothly insert the distal end portion of the long tube into the living body lumen 50 while grasping and operating the proximal end side. It is preferable to have strength (rigidity). In this case, for example, polyolefins such as polyethylene and polypropylene, polyesters such as polyamide and polyethylene terephthalate, fluorine-based polymers such as ETFE, PEEK (polyether ether ketone), and polyimide can be preferably used. The outer surface of the sheath on the distal end side may be coated with a resin having biocompatibility, particularly antithrombotic properties. As the antithrombogenic material, for example, polyhydroxyethyl methacrylate, a copolymer of hydroxyethyl methacrylate and styrene (for example, HEMA-St-HEMA block copolymer), or the like can be preferably used. Further, when the system 12 is used, since the position of the sheath 14 in the living body lumen 50 is visually recognized under X-ray fluoroscopy, an X-ray opaque marker may be attached to the distal end of the sheath 14.

  The shaft 20 is formed of a tube having a space (guide wire lumen) 20a formed therein, and is configured as an inner tube with respect to the outer sheath 14 by being inserted through the inner lumen 14a of the sheath 14 in the axial direction. A guide wire (not shown) is inserted into the guide wire lumen 20 a of the shaft 20. A hub 18 is connected to the proximal end side of the shaft 20, and an end tip 22 is connected to the distal end side of the shaft 20.

  The material of the shaft 20 is preferably a material having a certain degree of flexibility. For example, polyolefin (for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer), polyvinyl chloride, polyamide A thermoplastic resin such as elastomer or polyurethane, silicone rubber, latex rubber, or the like can be suitably used.

  The guide wire is inserted through the guide wire lumen 20 a of the shaft 20 through the hub 18 and extends to the most distal end of the delivery device 10. The surgeon operates the guide wire forward and backward (pushing and pulling) and rotating (torque operation) on the rear end (base end) side of the hub 18, so that the distal end of the guide wire is desired in the living body lumen 50. I will enter the position of.

  On the other hand, the operation unit 16 of the delivery device 10 is disposed on the proximal end side of the sheath 14, and a long hole (not shown) is formed on the side surface thereof. In the elongated hole, the operation pin 14b provided continuously to the proximal end side of the sheath 14 is exposed. The delivery device 10 is configured to move the sheath 14 forward and backward by operating the operation pin 14 b of the operation unit 16.

  Further, the hub 18 is connected to the proximal end side of the operation portion 16, and the proximal end side of the shaft 20 is connected to the inside of the hub 18, and has a function of supporting the shaft 20. Inside the hub 18, a passage 18 a that communicates with the guide wire lumen 20 a of the shaft 20 is formed. The passage 18 a communicates with a proximal-side opening 18 b formed on the proximal end surface of the hub 18. . A handle 18 c is provided on the side surface of the hub 18 so that the operator can easily grasp the delivery device 10.

  The delivery device 10 slides the sheath 14 relative to the shaft 20 by moving the operation pin 14b forward and backward while the operator holds the operation portion 16 (or the hub 18). Therefore, when the distal end portion of the sheath 14 is guided to a desired position in the biological lumen 50 and the sheath 14 is retracted, the stent graft 100 housed and held in the sheath 14 is expanded in the biological lumen 50. be able to.

  In the present embodiment, the stent graft 100 is accommodated by the single-layer sheath 14 (see FIG. 3), and the stent graft 100 is deployed by retreating the sheath 14, but the present invention is not limited to this configuration. The stent graft 100 may be housed by a plurality of sheaths. In this case, the stent graft 100 accommodated in the sheath can be expanded in stages by operating (proximal direction movement) in the order from the inner sheath to the outer sheath. Can be self-expanding.

  2 is a partial perspective view schematically showing the distal end portion of the delivery device 10 of FIG. 1, FIG. 2A is a diagram showing a state before the stent graft 100 is stored, and FIG. 2B shows a stored state of the stent graft 100. FIG.

  As shown in FIG. 2A, the end tip 22 is a member constituting the distal end side of the delivery device 10 and is connected to the distal end side of the shaft 20. The end tip 22 includes a distal end projecting portion 24 projecting toward the distal end side from the contact surface 22a with which the distal end portion of the sheath 14 abuts, and a guide portion 26 projecting rearward (proximal direction) from the corresponding contact surface 22a. Prepare. In addition, a guide wire lumen 20a of the shaft 20 is formed through the inside of the end tip 22 from the guide portion 26 on the proximal end side to the distal end protruding portion 24 (see FIG. 3).

  In order to reduce friction with the inner wall 50a of the biological lumen 50, the distal protrusion 24 is formed in a substantially conical shape (cone shape) whose diameter decreases from the contact surface 22a toward the distal end side. An end face 24a is provided at the tip of the shape. The end face 24a is formed with a distal end side opening 24b communicating with the guide wire lumen 20a (see FIG. 3).

  On the other hand, the guide portion 26 is connected to the contact surface 22 a of the end tip 22 and protrudes rearward (in the extending direction of the shaft 20), and its end portion (connecting surface 26 a) is connected to the shaft 20. Yes. The guide portion 26 is formed in a rectangular shape in a plan view (see FIG. 3B) and in a substantially wedge shape in a side view (see FIG. 3A). That is, the guide portion 26 has a pair of tapered surfaces 30 and 30 that become narrower from the contact surface 22a of the end chip 22 toward the connecting surface 26a.

  As shown in FIG. 2B, a pair of tapered surfaces 30, 30 has a wire rod 102 at the end portion (tip portion) of the stent graft 100 in a state where the stent graft 100 is folded and housed in the sheath 14 (first form). Abut. In other words, the guide part 26 has a function of guiding the wire 102 at the end so as to be in a desired bent state.

  The material of the end chip 22 is not particularly limited, but is preferably a material having a certain degree of flexibility, like the shaft 20, for example, polyolefin (for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene -Vinyl acetate copolymer, etc.), thermoplastic resins such as polyvinyl chloride, polyamide elastomer and polyurethane, silicone rubber, latex rubber and the like can be suitably used.

  In particular, since the guide portion 26 constitutes a connecting portion between the end tip 22 and the shaft 20, the end tip 22 follows the shape of the inner wall 50a when the delivery device 10 is advanced into the living body lumen 50. It is preferably formed of a synthetic resin material having relatively high flexibility so that it can move (bend) easily. Therefore, when the guide part 26 is integrally formed with the end chip 22, it is more preferable to use an elastic material such as silicone rubber or latex rubber.

  The delivery device 10 having the guide portion 26 according to the present embodiment is basically configured as described above. Next, the function and effect of the delivery device 10 will be described. 3A and 3B are explanatory views schematically showing the distal end portion of the delivery device 10 in a state in which the stent graft 100 is housed, in which FIG. 3A is a partial side sectional view, and FIG. 3B is a partial plan sectional view.

  First, the storage state of the stent graft 100 stored in the delivery device 10 (sheath 14) will be specifically described. As shown in FIG. 3, the wire 102 at the end of the stent-graft 100 has four top portions 102a, 102a, 102b, and 102b that are largely curved in the state accommodated in the sheath 14 (first form), and these It is deformed into a wave shape having four relatively straight connecting portions 102c... Connecting the top portions 102a, 102a, 102b, 102b. That is, in the first embodiment, a pair of valleys 102a and 102a that are curved toward the inner side in the axial direction of the stent graft 100 (graft 106) and a pair of peaks 102b and 102b that are curved toward the outer side in the axial direction are formed. The These four apexes 102a, 102a, 102b, and 102b are naturally produced by bending the annular wire 102 and partially moving the wire 102 in the axial direction.

  The stent graft 100 is housed in the sheath 14 such that the crest portions 102b and 102b of the wire 102 sandwich the guide portion 26 of the end tip 22. Therefore, the valleys 102 a and 102 a are arranged at positions facing the connecting surface 26 a of the guide part 26.

  In this state, the pair of tapered surfaces 30 and 30 abuts and supports the crests 102b and 102b of the wire 102 and the connecting parts 102c extending from the crests 102b and 102b to the troughs 102a and 102a. As a result, the connecting portion 102c extends in the axial direction along the inclination of the pair of tapered surfaces 30 and 30, and the curvature of the curved shape of the valley portions 102a and 102a continuous in the extending direction is increased. Can do.

  Here, when the stent graft 100 having the ring stent 104 is housed in a delivery device that does not include the guide portion 26, as shown in FIG. 4B, the inner angle of the peaks 102b and 102b in which the wire 102 is curved outward in the axial direction. While the graft 106 exists in Rb, the graft 106 does not exist in the inner angle Ra of the valleys 102a and 102a that curves inward in the axial direction, so the inner angle Ra of the valleys 102a and 102a is the inner angle Rb of the peaks 102b and 102b. It will be extremely curved compared to. That is, since the curvature of the valleys 102a and 102a is smaller than the curvature of the peaks 102b and 102b, the valleys 102a and 102a are greatly subjected to compressive strain due to the deformation of the first embodiment. Become.

  On the other hand, since the delivery device 10 according to the present embodiment includes the guide portion 26, the delivery device 10 can guide the trough portions 102a and 102a so that the curvature of the inner angle Ra of the trough portions 102a and 102a is increased. , 102a can be prevented from being subjected to a large compressive strain. Thereby, the expansion force and durability of the stent graft 100 can be stabilized.

  In addition, since the bent wire 102 is in contact with and supported by the pair of taper surfaces 30 and 30, the wire 102 can be entirely guided along the inclination of the pair of taper surfaces 30 and 30, The degree of curvature of the wire 102 can be set to a predetermined curvature without applying an extra load to the wire 102 by the guide of the guide portion 26.

  In this case, the delivery device 10 has the shape of the guide portion 26 (the length and inclination of the pair of tapered surfaces 30, 30) so that the curvature of the valley portions 102a, 102a of the wire 102 substantially matches the curvature of the peaks 102b, 102b. It is more preferable to form an angle. If the curvature of the troughs 102a and 102a and the crests 102b and 102b is made to substantially coincide, the wire 102 will distribute the load applied to each crest 102a, 102a, 102b, 102b evenly. This is because it can be surely reduced. The shape of the guide portion 26 that substantially matches the curvatures of the valley portions 102 a and 102 a and the peak portions 102 b and 102 b may be set as appropriate according to the diameter of the wire 102 and the inner diameter of the sheath 14.

  In the delivery device 10, when the distal end of the sheath 14 is delivered to a desired position in the living body lumen 50 by an operation of the operator, the sheath 14 is moved backward by the operation of the operation pin 14 b by the operator. As a result, the sheath 14 slides (retreats) relative to the shaft 20, and the stent graft 100 accommodated in the distal end portion of the sheath 14 is deployed. At this time, the wire 102 at the distal end portion of the stent graft 100 is surely expanded because the curved shape is well guided by the guide portion 26, and is interlocked with the expansion of the wire rod 102 at the distal end portion. In this way, the other wire 102 ′ is expanded. Thereby, the inner wall 50a of the biological lumen 50 can be supported by the stent graft 100 in the expanded state (second form). That is, when the living body lumen 50 is supported by the stent graft 100, the expanded state of the wire 102 at the end is an important element. However, according to the delivery device 10 according to the present embodiment, the guide 26 is the end. By guiding the curvature of the wire 102 to a predetermined curvature, a good expanded state can be formed. As a result, the placement accuracy of the stent graft 100 by the delivery device 10 can be improved.

  In the present embodiment, the configuration in which the guide portion 26 is engaged with the wire 102 at the distal end (end) of the stent graft 100 has been described. However, the wire at the proximal end (end) of the stent graft 100 is described. 102 (see FIG. 4) is preferably configured to engage the guide portion 26 in the same manner. In this case, the wire 102 at the proximal end of the stent graft 100 is different from the wire 102 at the distal end, and the formation positions of the valleys 102a and 102a and the peaks 102b and 102b are shifted by 90 °. The shape of the guide portion 26 is also formed so that the phase is shifted by about 90 ° with respect to the guide portion 26 on the distal end side.

  Furthermore, although the guide part 26 which concerns on this Embodiment is set as the structure which protrudes from the contact surface 22a of the edge part chip | tip 22 connected with the shaft 20, it is not limited to this structure, For example, from the side surface of the shaft 20 The guide part 26 may be protruded.

  As described above, according to the delivery device 10 according to the present embodiment, it is possible to prevent the wire 102 at the end of the stent graft 100 from being greatly bent with a simple configuration. As a result, it is possible to stabilize the expansion force and durability of the stent graft 100, and it is possible to perform satisfactory delivery of the stent graft 100.

  In addition, since the guide portion 26 is integrally formed with the end chip 22, the trough portions 102a and 102a of the wire 102 can be guided to a predetermined curvature without increasing the number of parts. Furthermore, since the guide portion 26 is projected in the extending direction of the shaft 20 with respect to the end tip 22 provided conventionally, the design of the shaft 20 itself is not greatly changed.

  The present invention is not limited to the above-described embodiment, and it is needless to say that various configurations and processes can be employed without departing from the gist of the present invention.

10. Stent graft delivery device (delivery device)
12. Stent graft delivery system (system)
DESCRIPTION OF SYMBOLS 14 ... Sheath 20 ... Shaft 22 ... End part tip 24 ... Tip protrusion part 26 ... Guide part 30 ... Tapered surface 100 ... Stent graft 102 ... Wire rod (end part)
102a ... Valley (top) 102b ... Mountain (top)
104 ... Ring stent 106 ... Graft

Claims (5)

A stent graft delivery device comprising: a sheath that houses a stent graft in a folded state; and a shaft that extends in the axial direction of the sheath inside the sheath,
The stent graft is configured to include an annular wire, and a tube body to which the wire is attached at least at one end.
The shaft includes a guide portion that guides a top portion that is bent toward the inner side in the axial direction of the tubular body by bending the wire at the one end portion so as to be bent with a predetermined curvature. . The stent-graft delivery device according to claim 1,
On the tip side of the shaft, an end tip that is larger than the outer diameter of the shaft is provided,
The stent graft delivery device, wherein the guide portion is integrally formed with the end tip and protrudes in the extending direction of the shaft. The stent graft delivery device according to claim 2,
The guide portion has a tapered surface that becomes narrower in the extending direction of the shaft, and the bent wire material at the one end is brought into contact with the tapered surface. The stent graft delivery device according to claim 3,
The stent graft delivery device, wherein the guide portion is made of a synthetic resin material having flexibility. In the stent graft delivery device according to any one of claims 1 to 4,
The stent-graft delivery device according to claim 1, wherein the predetermined curvature is a curvature that substantially coincides with a curvature of a top portion that is bent toward the axially outer side of the tubular body by bending the wire rod at the one end portion.

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