WO2013125297A1 - Stent - Google Patents

Stent Download PDF

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Publication number
WO2013125297A1
WO2013125297A1 PCT/JP2013/051698 JP2013051698W WO2013125297A1 WO 2013125297 A1 WO2013125297 A1 WO 2013125297A1 JP 2013051698 W JP2013051698 W JP 2013051698W WO 2013125297 A1 WO2013125297 A1 WO 2013125297A1
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WO
WIPO (PCT)
Prior art keywords
stent
distal end
outer peripheral
axial direction
peripheral surface
Prior art date
Application number
PCT/JP2013/051698
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English (en)
Japanese (ja)
Inventor
北岡孝史
Original Assignee
テルモ株式会社
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Filing date
Publication date
Application filed by テルモ株式会社 filed Critical テルモ株式会社
Publication of WO2013125297A1 publication Critical patent/WO2013125297A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/852—Two or more distinct overlapping stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/065—Y-shaped blood vessels
    • A61F2002/067—Y-shaped blood vessels modular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/826—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents more than one stent being applied sequentially
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter

Definitions

  • the present invention relates to a stent used for improving a lesion in a living body lumen.
  • a stent having a self-expanding function (self-expanding stent) disclosed in Japanese Patent Application Laid-Open No. 11-313893 has a distal end portion of a delivery catheter in which an outer tube is arranged around an inner tube. Delivered into the living body lumen in a state compressed and stored in the gap between the outer tubes, released and expanded by retracting the outer tube to the proximal end side, and placed in the desired lumen Can do.
  • a plurality of stents of this type may be used side by side so as to be adjacent to each other in the axial direction depending on the range of the lesion.
  • a plurality of stents are placed in this way, if the end of one stent and the end of the other stent are placed so as to overlap in the axial direction, the stent is expanded and urged radially outward.
  • the applied pressing force is increased because it is equivalent to two stents at the end of the stent, and the pressing force from the stent against the lumen increases, increasing the burden on the patient.
  • the inner diameter of the end decreases, and this may become a new constriction.
  • a general object of the present invention is to provide a stent capable of expanding a lesion with high accuracy by easily and reliably connecting along an axial direction without increasing a pressing force or decreasing an inner diameter due to an increase in wall thickness. There is to do.
  • the present invention is a stent formed in a tubular shape and placed in a living body lumen
  • one end portion has a first cutout portion in which the outer peripheral surface side is recessed radially inward, and the inner peripheral surface side is radially outward in the other end portion. It has the 2nd notch part hollowed in, It is characterized by the above-mentioned.
  • the first notch portion in which the outer peripheral surface side is recessed radially inward is provided, and the inner peripheral surface side is radially outward in the other end portion.
  • a second notch that is recessed is provided.
  • the first notch and the second notch that are recessed in the radial direction are engaged with each other. (Thickness in the direction) does not increase and can be connected easily and reliably. As a result, the stent connection site does not increase the load on the patient when it is expanded radially outward, and multiple stents are connected without any gaps, and the lesion is expanded with high accuracy. It becomes possible to make it.
  • FIG. 1 is an overall cross-sectional view showing a stent according to a first embodiment of the present invention.
  • FIG. 2A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 2B shows the tip of the second stent shown in FIG.
  • FIG. 2C is explanatory drawing which shows the state which connected the 2nd stent with respect to the 1st stent.
  • FIG. 2A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 2B shows the tip of the second stent shown in FIG.
  • It is explanatory drawing which shows the state inserted in the inside of a stent
  • FIG. 2C is explanatory drawing which shows the state which connected the 2nd stent with respect
  • FIG. 4A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 4B shows the tip of the second stent shown in FIG. 4A as the first stent
  • FIG. 4C is an explanatory view showing a state of being inserted into the stent
  • FIG. 4C is an explanatory view showing a state in which the second stent is connected to the first stent. It is a whole sectional view showing a stent concerning a 3rd embodiment of the present invention.
  • FIG. 6A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 6A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 6A is an explanatory view showing a state in which the second stent is brought close
  • FIG. 6B shows the tip of the second stent shown in FIG.
  • FIG. 6C is an explanatory diagram illustrating a state where the stent is inserted into the stent
  • FIG. 6C is an explanatory diagram illustrating a state where the second stent is connected to the first stent. It is a whole sectional view showing a stent concerning a 4th embodiment of the present invention.
  • FIG. 8A is an explanatory view showing a state in which the second stent is brought close to the first stent previously placed in the living body lumen
  • FIG. 8B shows the distal end of the second stent shown in FIG.
  • FIG. 8C is explanatory drawing which shows the state which connected the 2nd stent with respect to the 1st stent.
  • the stent 10 is formed in a substantially cylindrical shape with a mesh shape having a large number of openings, and is inserted into the living body lumen S by a stent delivery system (not shown). It is compressed in the radial direction, which is the central axis direction, and is placed in the stent delivery, and is released from the stent delivery system to the lesion in the living body lumen S to expand radially outward before compression. It is a self-expanding stent that can be restored to its shape.
  • the stent 10 according to the present invention is not limited to a self-expanding stent, and may be, for example, a balloon expandable stent that expands by expanding a balloon.
  • the stent 10 is formed in a mesh shape having a large number of openings.
  • the stent 10 is simply a hollow cylindrical body. The same applies to the other drawings.
  • the left side of the stent 10 is referred to as the “tip 10a” side (in the direction of arrow A), and the right side of the stent 10 is referred to as the “base end 10b” side (in the direction of arrow B). To do.
  • the distal end 10a of the stent 10 is formed with an outer peripheral recess (first notch) 12 whose outer peripheral surface is recessed in a radially inward direction at a predetermined depth, and the outer peripheral recess 12 extends in the circumferential direction of the distal end 10a. And a predetermined length in the axial direction from the end of the distal end 10a toward the base end 10b (arrow B direction). That is, the distal end 10a of the stent 10 is formed as a thin wall portion whose outer peripheral surface is cut out in an annular shape.
  • the proximal end 10b of the stent 10 is formed with an inner peripheral recess (second notch) 14 whose inner peripheral surface is recessed in a radially outward direction at a predetermined depth. It is formed with a constant depth along the circumferential direction of the end 10b, and is formed with a predetermined length in the axial direction from the end of the base end 10b toward the distal end 10a (in the direction of arrow A). That is, the proximal end 10b of the stent 10 is formed as a thin wall portion whose inner peripheral surface is cut out in an annular shape.
  • first marker 16 is formed in an annular shape on the entire outer peripheral surface of the outer peripheral recess 12
  • second marker 18 is formed in an annular shape on the entire inner peripheral surface of the inner peripheral recess 14.
  • the first and second markers 16 and 18 are formed with, for example, a predetermined width (corresponding to the lengths L1 and L2) along the axial direction (arrows A and B) of the stent 10 from an X-ray contrast material. .
  • a predetermined width corresponding to the lengths L1 and L2 along the axial direction (arrows A and B) of the stent 10 from an X-ray contrast material.
  • the stent 10 according to the first embodiment of the present invention is basically configured as described above. Next, a plurality of stents 10 (first stent 20A and second stent 20B) are connected. The case of performing this will be described with reference to FIGS. 2A to 2C. As shown in FIG. 2A, the case where the second stent 20B is newly connected to the proximal end 10b of the first stent 20A previously placed in the lesioned part in the living body lumen S and placed will be described. .
  • the second stent 20B housed in a stent delivery system (not shown) is inserted into the living body lumen S.
  • the first stent 20A is already self-expanding radially outward in the living body lumen S, while the second stent 20B is in a compressed state compressed radially inward.
  • the second stent 20B is further connected to the first stent.
  • the distal end 10a of the second stent 20B is inserted into the inside from the proximal end 10b of the first stent 20A, and the second marker 18 of the first stent 20A and the first marker of the second stent 20B are inserted. 16 is matched.
  • the distal end 10a of the second stent 20B is connected to the proximal end 10b of the first stent 20A previously placed in the living body lumen S and is placed in the living body lumen S.
  • the distal end 10a of the stent 10 is provided with the outer peripheral recess 12 whose outer peripheral surface is recessed radially inward, and the inner peripheral surface is provided at the proximal end 10b of the stent 10.
  • An inner peripheral recess 14 that is recessed in the radially outward direction is provided.
  • the dimension which added the depth D1 of the outer peripheral side recessed part 12 and the depth D2 of the inner peripheral side recessed part 14 becomes the thickness T of the stent 10, and the outer peripheral side recessed part 12 and the inner It forms so that length L1 and L2 along the axial direction of the circumference side recessed part 14 may become the same.
  • the plurality of stents 10 can be connected and placed without gaps without increasing the load on the patient's biological lumen S, and the plurality of stents 10 (20A) can be placed on the lesion in the biological lumen S. 20B) can be placed and expanded with high accuracy.
  • first marker 16 is annularly provided on the entire outer peripheral surface of the outer peripheral recess 12
  • second marker 18 is annularly provided on the entire inner peripheral surface of the inner peripheral recess 14, so that the first and second markers 16, 18 are provided.
  • the stent 10 is placed in such a manner that the two markers 16 and 18 overlap each other while the first and second markers 16 and 18 are confirmed by X-ray fluoroscopy by being formed from an X-ray contrast material.
  • the two stents 10 can be easily and reliably connected.
  • the portion where the outer peripheral recess 12 and the inner peripheral recess 14 are formed may be formed of a material containing an X-ray contrast material, for example. Accordingly, for example, the positions of the distal end 10a and the proximal end 10b can be confirmed under fluoroscopy without providing the first and second markers 16 and 18. For example, the first and second Compared with the case where the markers 16 and 18 are provided, the manufacturing process of the stent 10 can be shortened.
  • the outer peripheral side concave portion 12 is provided on the outer peripheral surface of the distal end 10a of the stent 10 and the inner peripheral side concave portion 14 is provided on the inner peripheral surface of the proximal end 10b.
  • the present invention is not limited to this. Instead, the inner peripheral recess 14 may be provided on the inner peripheral surface of the distal end 10a, and the outer peripheral recess 12 may be provided on the outer peripheral surface of the base end 10b. That is, the outer peripheral side concave portion 12 and the inner peripheral side concave portion 14 may be provided in pairs at the distal end 10a and the proximal end 10b of the stent 10.
  • FIGS. 3 and 4A to 4C a stent 30 according to a second embodiment is shown in FIGS. 3 and 4A to 4C.
  • the same referential mark is attached
  • the distal end 10a of the stent 30 has a first taper portion (first notch portion) 32 formed on the outer peripheral surface of the stent 30 so as to gradually increase in thickness toward the proximal end 10b side.
  • the proximal end 10b of the stent 30 has a second taper portion (second notch portion) 34 formed on the inner peripheral surface gradually thicker toward the distal end 10a side. This is different from the stent 10 according to the above.
  • the proximal end 10b of the stent 30 (hereinafter referred to as the first stent 40A) previously placed in the lesioned part in the living body lumen S is stored in a stent delivery system (not shown).
  • the new stent 30 (hereinafter, referred to as the second stent 40B) is moved closer.
  • the second stent 40B is further moved toward the first stent 40A, and the first tapered portion 32 formed at the distal end 10a of the second stent 40B is moved to the base of the first stent 40A. Insert from the end 10b side into the inside.
  • the stent 40B is released from the distal end of a stent delivery system (not shown) into the living body lumen S and expanded.
  • the state in which the first taper portion 32 and the second taper portion 34 coincide with each other in the axial direction (directions of arrows A and B) means that the tip end portion of the first taper portion 32 is as shown in FIG. 4B.
  • the state is located at the proximal end portion of the second tapered portion 34 and the proximal end portion of the first tapered portion 32 is located at the distal end portion of the second tapered portion 34.
  • the second stent 40B expands radially outward, and the first tapered portion 32 of the second stent 40B abuts against the second tapered portion 34 of the first stent 40A. Is engaged. At this time, the first tapered portion 32 having a triangular cross section and the second tapered portion 34 formed in a triangular cross section with substantially the same cross-sectional area are engaged with each other, so that the connecting portion is the first and second portions.
  • the thickness is substantially equal to the thickness T (see FIG. 3) of the stents 40A and 40B.
  • the distal end 10a of the second stent 40B is connected to the proximal end 10b of the first stent 40A previously placed in the living body lumen S, and is placed in the living body lumen S.
  • the first tapered portion 32 is formed on the distal end 10a of the stent 30 so that the outer peripheral surface is gradually thickened toward the proximal end 10b side (arrow B direction).
  • a second tapered portion 34 having an inner peripheral surface formed gradually thicker toward the distal end 10a side (in the direction of arrow A) is formed at the proximal end 10b of the stent 30, and the first and second tapered portions 32 are formed.
  • 34 have the same inclination angles ⁇ 1 and ⁇ 2, and the lengths along the axial direction (arrows A and B directions) are the same.
  • the second taper portion 34 of one stent 30 is connected to the second tapered portion 34.
  • a plurality of stents can be connected and placed without gaps without increasing the load on the patient's biological lumen S, and the plurality of stents 30 (40A, 40A, 40B) can be placed and expanded with high accuracy.
  • first and second taper portions 32 and 34 can be easily formed by inclining the outer peripheral surface and the inner peripheral surface of the stent 30 at a predetermined angle, the manufacturability of the stent 30 is improved. be able to.
  • a marker made of an X-ray contrast material is provided on each of the outer peripheral surface of the first tapered portion 32 (the surface on which the tapered portion is formed) and the inner peripheral surface of the second tapered portion 34 (the surface on which the tapered portion is formed). May be.
  • the first tapered portion 32 is provided on the outer peripheral side of the distal end 10a of the stent 30 and the second tapered portion 34 is provided on the inner peripheral side of the proximal end 10b.
  • the present invention is not limited to this.
  • the second taper portion 34 may be provided on the inner peripheral side of the distal end 10a, and the first taper portion 32 may be provided on the outer peripheral side of the base end 10b. That is, it is only necessary that the first tapered portion 32 and the second tapered portion 34 are provided as a pair at the distal end 10a and the proximal end 10b of the stent 30.
  • FIGS. 5 and 6A to 6C a stent 50 according to a third embodiment is shown in FIGS. 5 and 6A to 6C.
  • the same referential mark is attached
  • an uneven first engaging portion (first notch portion) 52 is provided on the outer peripheral surface of the distal end 10a of the stent 50, and the proximal end 10b of the stent 50 is provided.
  • the second embodiment is different from the stents 10 and 30 according to the first and second embodiments in that an uneven second engaging portion (second notch portion) 54 is provided on the inner peripheral surface.
  • the stent 50 includes a first engagement portion 52 provided on the distal end 10a side and a second engagement portion 54 provided on the proximal end 10b side. It is formed with substantially the same length along the direction (arrow A, B direction). The first engaging part 52 and the second engaging part 54 are formed in substantially the same shape.
  • the first engaging portion 52 is formed to be recessed in the radially inward direction with respect to the outer peripheral surface of the stent 50, and protrudes outward in the radial direction from the first inclined portion 56 formed on the most distal end 10a side (arrow A direction).
  • the plurality of first convex portions 58 and the plurality of first concave portions 60 formed adjacent to the first convex portions 58.
  • the first convex portions 58 are formed in, for example, a triangular cross-section that tapers in the radially outward direction, and are formed at predetermined intervals along the axial direction of the stent 50.
  • the first recesses 60 are formed in, for example, a triangular cross section that tapers inward in the radial direction, and are formed at predetermined intervals along the axial direction of the stent 50.
  • the first inclined portion 56 is formed to be inclined so as to gradually reduce the diameter toward the distal end 10 a of the stent 50.
  • the second engagement portion 54 is formed to be recessed in the radially outward direction with respect to the inner peripheral surface of the stent 50, and the second inclined portion 62 formed on the most proximal end 10 b side (arrow B direction) and the radially inward direction And a plurality of second concave portions 66 formed adjacent to the second convex portions 64.
  • the second convex portions 64 are formed in, for example, a triangular cross-section that tapers inward in the radial direction, and are formed at predetermined intervals along the axial direction of the stent 50.
  • the second recesses 66 are formed, for example, in a triangular shape that tapers in the radially outward direction, and are formed at predetermined intervals along the axial direction of the stent 50.
  • the second inclined portion 62 is formed to be inclined so that the diameter gradually decreases toward the proximal end 10 b of the stent 50.
  • the second convex portion 64 is formed with substantially the same cross-sectional shape as the first convex portion 58
  • the second concave portion 66 is formed with substantially the same cross-sectional shape as the first concave portion 60
  • the second inclined portion. 62 is formed in the same cross-sectional shape as the first inclined portion 56.
  • a proximal end 10b of a stent 50 (hereinafter referred to as a first stent 70A) previously placed in a lesion in the living body lumen S is stored in a stent delivery system (not shown).
  • a new stent 50 (hereinafter, referred to as a second stent 70B) is made to approach.
  • the second stent is further moved to the first stent 70A side, and the first engaging portion 52 formed at the distal end 10a of the second stent is moved to the proximal end of the first stent 70A. Insert from the 10b side into the inside.
  • the second stent 70B is released from the distal end of a stent delivery system (not shown) into the living body lumen S and expanded.
  • the state where the first engagement portion 52 and the second engagement portion 54 coincide with each other in the axial direction indicates that the first engagement portion 52 has a first state as shown in FIG. 6B.
  • the first convex portion 58 and the first concave portion 60 are positioned so as to face the second concave portion 66 and the second convex portion 64 of the second engaging portion 54, respectively.
  • the first convex portion 58 of the second stent 70B expanded radially outward is inserted into the second concave portion 66 of the first stent 70A, and the first concave portion of the second stent 70B is inserted.
  • the second protrusion 64 of the first stent 70A is inserted, whereby the second engagement portion 54 is engaged with the first engagement portion 52, and the stents 50 (70A, 70B) are connected to each other. It becomes.
  • the first engaging portion 52 and the second engaging portion 54 formed with substantially the same cross-sectional shape are engaged with each other, so that the connecting portion has the thickness of the first and second stents 70A and 70B.
  • the thickness is substantially equal to the thickness T (see FIG. 5).
  • the distal end 10a of the second stent 70B is connected to the proximal end 10b of the first stent 70A previously placed in the living body lumen S, and is placed in the living body lumen S.
  • the distal end 10a of the stent 50 is provided with the first engaging portion 52 formed in an uneven shape toward the radially outward direction, and the proximal end 10b of the stent 50 is provided.
  • a second engaging portion 54 that is formed in a concave-convex shape in the radial inward direction, along the axial direction (arrow A, B direction) of the first engaging portion 52 and the second engaging portion 54.
  • the length is formed to be substantially the same.
  • the plurality of stents 50 can be connected and placed without gaps without increasing the load on the patient's biological lumen S, and the plurality of stents 50 (70A) can be placed on the lesioned part in the biological lumen S. 70B) can be placed and expanded with high accuracy.
  • the first convex portion 58 and the second concave portion 66 which are formed in a triangular cross section, and the first concave portion 60 and the second convex portion 64 are engaged with each other.
  • the first and second convex portions 58 and 64 and the first and second concave portions 60 and 66 are guided by the inclined surfaces to be engaged with each other.
  • one stent 50 ( 70A) and the other stent 50 (70B) are relatively moved and can be reliably connected.
  • the marker which consists of X-ray contrast material is provided in the outer peripheral surface (surface in which the unevenness
  • the first engaging portion 52 is provided on the outer peripheral surface of the distal end 10a of the stent 50 and the second engaging portion 54 is provided on the inner peripheral surface of the proximal end 10b.
  • the second engagement portion 54 is provided on the inner peripheral surface of the distal end 10a
  • the first engagement portion 52 is provided on the outer peripheral surface of the base end 10b. May be. That is, it is only necessary that the first engagement portion 52 and the second engagement portion 54 are provided in pairs at the distal end 10a and the proximal end 10b of the stent 50.
  • FIGS. 7 and 8A to 8C a stent 80 according to a fourth embodiment is shown in FIGS. 7 and 8A to 8C.
  • the same components as those of the stents 10, 30, and 50 according to the first to third embodiments described above are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the first marker 16 is formed in an annular shape on a part of the outer peripheral surface of the outer peripheral recess 12, and in the inner peripheral recess 14.
  • the second marker 18 is formed in a ring shape on a part of the inner peripheral surface.
  • the first marker 16 is formed to be half the length L1 from the distal end 10a of the stent 80 along the axial direction (arrow A, B direction) of the outer peripheral recess 12. That is, the length L3 along the axial direction of the first marker 16 is 1 / 2L1.
  • a proximal end 10b of a stent 80 (hereinafter referred to as a first stent 90A) placed in advance in a lesion in the living body lumen S is housed in a stent delivery system (not shown).
  • a new stent 80 (hereinafter referred to as a second stent 90B) is brought closer.
  • the distal end 10a of the second stent 90B is inserted into the inside from the proximal end 10b of the first stent 90A, and the distal end 81 of the second marker 18 and the second stent in the first stent 90A.
  • the base end 82 of the 1st marker 16 in 90B is made to correspond.
  • the distal end 10a of the second stent 90B is connected to the proximal end 10b of the first stent 90A previously placed in the living body lumen S, and is placed in the living body lumen S.
  • the stent according to the present invention is not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

La présente invention concerne un stent (10) composé d'un treillis sensiblement cylindrique présentant une pluralité d'ouvertures. Une extrémité distale (10a) du stent présente un évidement périphérique externe (12) où la surface périphérique externe est dentelée radialement vers l'intérieur à une profondeur prédéterminée, et l'évidement périphérique externe (12) est formé à une profondeur constante le long de la direction périphérique de l'extrémité distale (10a). Une extrémité distale (10b) du stent (10) présente un évidement périphérique interne (14) où la surface périphérique interne est dentelée radialement vers l'extérieur à une profondeur prédéterminée, et l'évidement périphérique interne (14) est formé à une profondeur constante le long de la direction périphérique de l'extrémité proximale (10b). Lorsque deux stents (10) sont reliés entre eux, l'extrémité distale (10a) d'un stent (10) est insérée dans l'extrémité proximale (10b) de l'autre stent (10), qui a été précédemment à demeure, et le procédé périphérique interne (14) de l'extrémité proximale (10b) et l'évidement périphérique externe (12) de l'extrémité distale (10a) sont mis en prise l'un avec l'autre.
PCT/JP2013/051698 2012-02-21 2013-01-28 Stent WO2013125297A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-034820 2012-02-21
JP2012034820 2012-02-21

Publications (1)

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WO2013125297A1 true WO2013125297A1 (fr) 2013-08-29

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PCT/JP2013/051698 WO2013125297A1 (fr) 2012-02-21 2013-01-28 Stent

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WO (1) WO2013125297A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008096512A1 (fr) * 2007-02-09 2008-08-14 Piolax Medical Devices, Inc. Stent
JP2009530060A (ja) * 2006-03-20 2009-08-27 エックステント・インコーポレーテッド 連結されたプロテーゼセグメントの展開装置及び方法
WO2010132244A2 (fr) * 2009-05-14 2010-11-18 Boston Scientific Scimed, Inc. Endoprothèse sensible à l'érosion biologique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009530060A (ja) * 2006-03-20 2009-08-27 エックステント・インコーポレーテッド 連結されたプロテーゼセグメントの展開装置及び方法
WO2008096512A1 (fr) * 2007-02-09 2008-08-14 Piolax Medical Devices, Inc. Stent
WO2010132244A2 (fr) * 2009-05-14 2010-11-18 Boston Scientific Scimed, Inc. Endoprothèse sensible à l'érosion biologique

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