WO2009125899A1 - Stent used in blood vessel - Google Patents

Stent used in blood vessel Download PDF

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Publication number
WO2009125899A1
WO2009125899A1 PCT/KR2008/003635 KR2008003635W WO2009125899A1 WO 2009125899 A1 WO2009125899 A1 WO 2009125899A1 KR 2008003635 W KR2008003635 W KR 2008003635W WO 2009125899 A1 WO2009125899 A1 WO 2009125899A1
Authority
WO
WIPO (PCT)
Prior art keywords
blood vessel
stent
wire
cylindrical stent
artificial
Prior art date
Application number
PCT/KR2008/003635
Other languages
French (fr)
Inventor
Sung-Gwon Kang
Do-Yeon Lee
Seung-Hwan Jaegal
Original Assignee
S & G Biotech, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by S & G Biotech, Inc. filed Critical S & G Biotech, Inc.
Publication of WO2009125899A1 publication Critical patent/WO2009125899A1/en

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Classifications

    • 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
    • A61F2/07—Stent-grafts
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • 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
    • A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/89—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
    • 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
    • A61F2/07—Stent-grafts
    • A61F2002/075—Stent-grafts the stent being loosely attached to the graft material, e.g. by stitching
    • 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
    • A61F2220/0008—Fixation appliances for connecting prostheses to the body
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0054—V-shaped

Definitions

  • the present invention relates to a stent for a blood vessel, more specific ⁇ dly to a stent for a blood vessel which effectively prevents the phenomenon in which the blood passing through the blood vessel leaks out into the space between the front end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel, and which is also easy to perform an operation therewith.
  • the stent for a blood vessel consists of an artificial blood vessel (graft) made of fabric and a cylindrical stent made of wire and having a lengthwise axis, and is used to treat the phenomenon in which blood passing through the blood vessel leaks out of the blood vessel to the region around it
  • a stent for a blood vessel As a stent for a blood vessel is widely used conventionally, there is one which consists of an artificial blood vessel (graft) made of fabric, and in which all the parts of the cylindrical stent made of wire and having ⁇ i lengthwise axis are monolithically fixed by suture to the outer surface of the artificial blood vessel.
  • graft artificial blood vessel
  • a stent for a blood vessel is a structure in which the whole of the cylindrical stent is inserted over the outside of the artificial blood vessel (graft).
  • the conventional stent for a blood vessel described above has a problem in that a phenomenon, in which the blood passing through the blood vessel leaks out into the space between the front end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel, occurs severely during an operation on the blood vessel.
  • a stent for a blood vessel which consists of an artificial blood vessel (graft) made of fabric and in which all the parts of the cylindrical stent made of wire and having a lengthwise axis are monolithically fixed by suture on the inner surface of the artificial blood vessel.
  • graft an artificial blood vessel
  • a stent for a blood vessel is a structure in which the whole of the cylindrical stent is inserted into the artificial blood vessel (graft) and fixed thereto.
  • the present invention is to solve such conventional problems with an object to provide a stent for a blood vessel whereby not only operation is easy but also it is possible to effectively prevent the phenomenon in which blood passing through the blood vessel leaks out into the space between the top end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel for operation.
  • a stent for a blood vessel comprising: (i) an artificial blood vessel A made of fabric; and (ii) an upper cylindrical stent Bl, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other, wherein said upper cylindrical stent Bl and lower cylindrical stent B3 are monolithically fixed by suture on the inner surface of the artificial blood vessel A, and said middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A, and the top end portion T of the upper cylindrical stent Bl has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof and is protruded out of said artificial blood vessel A.
  • the present invention can effectively prevent the blood passing through the blood vessel from leaking out into the space between the top end portion and the rear end portion of the stent for a blood vessel installed on the blood vessel wall and in the blood vessel and make operation easy by preventing the phenomenon in which the guide wire is caught on the cylindrical stent during operation of inserting the stent for a blood vessel into the blood vessel.
  • FIGs. 1 and 2 are photographs of a stent for a blood vessel according to the present invention
  • Fig. 3 is an enlarged photograph of the top end portion of the stent for a blood vessel according to the present invention
  • FIGs. 4 and 5 are perspective views of an artificial blood vessel A composing the stent for a blood vessel of the present invention
  • Figs. 6 and 7 are partially enlarged views showing the structure of an upper cylindrical stent Bl composing the stent for a blood vessel of the present invention
  • Fig. 8 is a partially enlarged view showing the structure of a middle cylindrical stent B2 composing the stent for a blood vessel of the present invention
  • Fig. 9 is a partially enlarged view showing the structure of a lower cylindrical stent B3 composing the stent for a blood vessel of the present invention.
  • A artificial blood vessel (graft)
  • B 1 upper cylindrical stent
  • B2 middle cylindrical stent
  • B3 lower cylindrical stent
  • Wl-WlO wire for composing stent BEST MODE FOR CARRYING OUT THE INVENTION
  • the stent for a blood vessel of the present invention comprises, as shown in Figs. 1 and 2, (i) an artificial blood vessel A made of fabric, and (ii) an upper cylindrical stent Bl, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other.
  • Figs. 1 and 2 are photographs of a stent for a blood vessel according to the present invention.
  • the upper cylindrical stent Bl and the lower cylindrical stent B3 are monolithically fixed by suture to the inner surface of the artificial blood vessel A, and the middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A.
  • the top end portion T of the upper cylindrical stent Bl has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof, and is protruded out of the artificial blood vessel A.
  • Fig. 3 is an enlarged photograph of the top end portion of the stent for a blood vessel according to the present invention.
  • the artificial blood vessel A is in a cylinder form having a lengthwise axis and is made of fabric.
  • the artificial blood vessel A has one or more, preferably one to five blood passing holes 1, punched.
  • the stent for a blood vessel of the present invention comprising the artificial blood vessel A with blood passing holes 1 punched is useful for treating a branched blood vessel.
  • FIGs. 4 and 5 are perspective views of an artificial blood vessel A composing the stent for a blood vessel of the present invention.
  • the upper cylindrical stent Bl has a structure in which valley portions V of a topmost wire Wl composing the stent and peak portions P of a wire W2 located just below the topmost wire cross each other to form rhombic cells 2.
  • This structure is effective for preventing blood from leaking out between the blood vessel wall and the top end portion of the stent for a blood vessel.
  • Figs. 6 and 7 are partially enlarged views showing the structure of an upper cylindrical stent B 1 composing the stent for a blood vessel of the present invention.
  • a plurality of fixing hooks 3 are formed at the top end portion T of the upper cylindrical stent B 1 protruded out of the artificial blood vessel A, and they can be effectively used to fix the stent for a blood vessel to the blood vessel wall.
  • the middle cylindrical stent B2 includes a plurality of wires W5, W6 and W7 in which valley portions V and peak portions P are alternatingly formed to make a bent shape.
  • Fig. 8 is a partially enlarged view showing the structure of a middle cylindrical stent B2 composing the stent for a blood vessel of the present invention.
  • the lower cylindrical stent B3 has a structure in which peak portions P of a bottommost end wire WlO composing the stent and valley portions V of a wire W9 arrayed just above the bottommost end wire cross each other to form rhombic cells 2.
  • This structure is effective for preventing the phenomenon in which the backflowing blood leaks out between the blood vessel wall and the rear end portion of the stent for a blood vessel.
  • Fig. 9 is a partially enlarged view showing the structure of a lower cylindrical stent B3 composing the stent for a blood vessel of the present invention.
  • peak portions P of a wire W2 located just above the blood passing hole 1 punched on the artificial blood vessel A has a structure in which they are crossed each other with the valley portions V of a wire Wl located above it so as to form rhombic cells 2
  • valley portions V of a wire W3 located just below the blood passing hole 1 has a structure in which they are crossed each other with pe ⁇ ik portions P of a wire W4 located just below it so as to form rhombic cells 2.
  • This structure is all the more preferable from the standpoint of improving durability or shape stability for the pressure generated when blood passes through the blood passing hole 1.
  • supporting wires S for connecting the valley portions V of the wire located at the over the blood passing hole 1 lengthwise of the cylindrical stent and the peak portions P located at the under the blood passing hole 1 are installed respectively on the left and right of the blood passing hole 1. Also, this structure is all the more preferable from the standpoint of improving durability or shape stability for the pressure generated when blood passes through the blood passing hole 1.
  • the present invention is used as a stent for a blood vessel for treating the phenomenon in which the cells on the blood vessel wall were damaged so the blood passing through the blood vessel leaks out of the blood vessel to the place around it.

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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)
  • Gastroenterology & Hepatology (AREA)
  • Pulmonology (AREA)
  • Prostheses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The present invention discloses a stent for a blood vessel. The stent for a blood vessel comprises: (i) an artificial blood vessel A made of fabric; and (ii) an upper cylindrical stent B1, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other, wherein said upper cylindrical stent B1 and lower cylindrical stent B3 are monolithically fixed by suture on the inner surface of the artificial blood vessel A, and said middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A, and the top end portion T of the upper cylindrical stent B1 has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof and is protruded out of said artificial blood vessel A. The present invention can effectively prevent the blood passing through the blood vessel from leaking out into the space between the top end portion and the rear end portion of the stent for a blood vessel installed on the blood vessel wall and in the blood vessel and make operation easy by preventing the phenomenon in which the guide wire is caught on the cylindrical stent during operation of inserting the stent for a blood vessel into the blood vessel.

Description

STENT USED IN BLOOD VESSEL
TECHNICAL FIELD
The present invention relates to a stent for a blood vessel, more specificεdly to a stent for a blood vessel which effectively prevents the phenomenon in which the blood passing through the blood vessel leaks out into the space between the front end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel, and which is also easy to perform an operation therewith. BACKGROUND ART
The stent for a blood vessel consists of an artificial blood vessel (graft) made of fabric and a cylindrical stent made of wire and having a lengthwise axis, and is used to treat the phenomenon in which blood passing through the blood vessel leaks out of the blood vessel to the region around it
As a stent for a blood vessel is widely used conventionally, there is one which consists of an artificial blood vessel (graft) made of fabric, and in which all the parts of the cylindrical stent made of wire and having εi lengthwise axis are monolithically fixed by suture to the outer surface of the artificial blood vessel. In other words, such a stent for a blood vessel is a structure in which the whole of the cylindrical stent is inserted over the outside of the artificial blood vessel (graft). But the conventional stent for a blood vessel described above has a problem in that a phenomenon, in which the blood passing through the blood vessel leaks out into the space between the front end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel, occurs severely during an operation on the blood vessel.
As another stent for a blood vessel widely used conventionally, there is one which consists of an artificial blood vessel (graft) made of fabric and in which all the parts of the cylindrical stent made of wire and having a lengthwise axis are monolithically fixed by suture on the inner surface of the artificial blood vessel. In other words, such a stent for a blood vessel is a structure in which the whole of the cylindrical stent is inserted into the artificial blood vessel (graft) and fixed thereto.
But the conventional stents for a blood vessel described above have a problem in that operation is inconvenient because a phenomenon, in which the guide wire is caught on the cylindrical stent inserted into the artificial blood vessel, is severe during an operation of inserting the stent for a blood vessel into the blood vessel. DISCLOSURE OF THE INVENTION (TECHNICAL PROBLEM)
The present invention is to solve such conventional problems with an object to provide a stent for a blood vessel whereby not only operation is easy but also it is possible to effectively prevent the phenomenon in which blood passing through the blood vessel leaks out into the space between the top end portion and the rear end portion of the stent for a blood vessel that is installed on the blood vessel wall and in the blood vessel for operation. (TECHNICAL MEANS TO SOLVE THE PROBLEM)
In accordance with another aspect of the present invention, there is provided a stent for a blood vessel comprising: (i) an artificial blood vessel A made of fabric; and (ii) an upper cylindrical stent Bl, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other, wherein said upper cylindrical stent Bl and lower cylindrical stent B3 are monolithically fixed by suture on the inner surface of the artificial blood vessel A, and said middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A, and the top end portion T of the upper cylindrical stent Bl has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof and is protruded out of said artificial blood vessel A. (ADVANTAGEOUS EFFECTS)
The present invention can effectively prevent the blood passing through the blood vessel from leaking out into the space between the top end portion and the rear end portion of the stent for a blood vessel installed on the blood vessel wall and in the blood vessel and make operation easy by preventing the phenomenon in which the guide wire is caught on the cylindrical stent during operation of inserting the stent for a blood vessel into the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects, features, aspects, and advantages of preferred embodiments of the present invention will be more fully described in the following detailed description, taken in conjunction with the accompanying drawings. In the drawings:
Figs. 1 and 2 are photographs of a stent for a blood vessel according to the present invention; Fig. 3 is an enlarged photograph of the top end portion of the stent for a blood vessel according to the present invention;
Figs. 4 and 5 are perspective views of an artificial blood vessel A composing the stent for a blood vessel of the present invention;
Figs. 6 and 7 are partially enlarged views showing the structure of an upper cylindrical stent Bl composing the stent for a blood vessel of the present invention;
Fig. 8 is a partially enlarged view showing the structure of a middle cylindrical stent B2 composing the stent for a blood vessel of the present invention; and Fig. 9 is a partially enlarged view showing the structure of a lower cylindrical stent B3 composing the stent for a blood vessel of the present invention.
< Description of Symbols of the Major Parts of the Drawings> A: artificial blood vessel (graft) B 1 : upper cylindrical stent B2: middle cylindrical stent B3: lower cylindrical stent
1: hole for blood passing 2: cell formed by wire crossing
3: fixing hook P: wire peak portion S: supporting wire V: wire valley portion
Wl-WlO: wire for composing stent BEST MODE FOR CARRYING OUT THE INVENTION
Below the present invention will be described in detail with reference to the accompanying drawings. First, the stent for a blood vessel of the present invention comprises, as shown in Figs. 1 and 2, (i) an artificial blood vessel A made of fabric, and (ii) an upper cylindrical stent Bl, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other. Figs. 1 and 2 are photographs of a stent for a blood vessel according to the present invention.
The upper cylindrical stent Bl and the lower cylindrical stent B3 are monolithically fixed by suture to the inner surface of the artificial blood vessel A, and the middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A.
And as shown in Fig. 3, the top end portion T of the upper cylindrical stent Bl has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof, and is protruded out of the artificial blood vessel A.
Fig. 3 is an enlarged photograph of the top end portion of the stent for a blood vessel according to the present invention.
As shown in Figs. 4 and 5, the artificial blood vessel A is in a cylinder form having a lengthwise axis and is made of fabric.
The artificial blood vessel A has one or more, preferably one to five blood passing holes 1, punched.
The stent for a blood vessel of the present invention comprising the artificial blood vessel A with blood passing holes 1 punched is useful for treating a branched blood vessel.
Figs. 4 and 5 are perspective views of an artificial blood vessel A composing the stent for a blood vessel of the present invention.
As shown in Figs. 6 and 7, the upper cylindrical stent Bl has a structure in which valley portions V of a topmost wire Wl composing the stent and peak portions P of a wire W2 located just below the topmost wire cross each other to form rhombic cells 2. This structure is effective for preventing blood from leaking out between the blood vessel wall and the top end portion of the stent for a blood vessel.
Figs. 6 and 7 are partially enlarged views showing the structure of an upper cylindrical stent B 1 composing the stent for a blood vessel of the present invention.
As shown in Fig. 6, a plurality of fixing hooks 3 are formed at the top end portion T of the upper cylindrical stent B 1 protruded out of the artificial blood vessel A, and they can be effectively used to fix the stent for a blood vessel to the blood vessel wall.
As shown in Fig. 8, the middle cylindrical stent B2 includes a plurality of wires W5, W6 and W7 in which valley portions V and peak portions P are alternatingly formed to make a bent shape.
Fig. 8 is a partially enlarged view showing the structure of a middle cylindrical stent B2 composing the stent for a blood vessel of the present invention.
As shown in Fig. 9, the lower cylindrical stent B3 has a structure in which peak portions P of a bottommost end wire WlO composing the stent and valley portions V of a wire W9 arrayed just above the bottommost end wire cross each other to form rhombic cells 2. This structure is effective for preventing the phenomenon in which the backflowing blood leaks out between the blood vessel wall and the rear end portion of the stent for a blood vessel.
Fig. 9 is a partially enlarged view showing the structure of a lower cylindrical stent B3 composing the stent for a blood vessel of the present invention.
And as shown in Fig. 6, peak portions P of a wire W2 located just above the blood passing hole 1 punched on the artificial blood vessel A has a structure in which they are crossed each other with the valley portions V of a wire Wl located above it so as to form rhombic cells 2, whereas valley portions V of a wire W3 located just below the blood passing hole 1 has a structure in which they are crossed each other with peεik portions P of a wire W4 located just below it so as to form rhombic cells 2. This structure is all the more preferable from the standpoint of improving durability or shape stability for the pressure generated when blood passes through the blood passing hole 1.
In addition, supporting wires S for connecting the valley portions V of the wire located at the over the blood passing hole 1 lengthwise of the cylindrical stent and the peak portions P located at the under the blood passing hole 1 are installed respectively on the left and right of the blood passing hole 1. Also, this structure is all the more preferable from the standpoint of improving durability or shape stability for the pressure generated when blood passes through the blood passing hole 1. INDUSTRIAL APPLICABILITY
The present invention is used as a stent for a blood vessel for treating the phenomenon in which the cells on the blood vessel wall were damaged so the blood passing through the blood vessel leaks out of the blood vessel to the place around it.
Although the present invention has been described in connection with the exemplary embodiments illustrated in the drawings, it is only illustrative. It will be understood by those skilled in the art that various modifications and equivalents can be made to the present invention. Therefore, the true technical scope of the present invention should be defined by the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A stent for a blood vessel comprising: (i) an artificial blood vessel A made of fabric; and (ii) an upper cylindrical stent Bl, a middle cylindrical stent B2 and a lower cylindrical stent B3 which are made of wire and separated from each other, wherein said upper cylindrical stent Bl and lower cylindrical stent B3 are monolithically fixed by suture on the inner surface of the artificial blood vessel A, said middle cylindrical stent B2 is fixed by suture to the outer surface of the artificial blood vessel A, and the top end portion T of the upper cylindrical stent Bl has a shape of fallopian tube with the diameter gradually increasing toward the top end thereof and is protruded out of said artificial blood vessel A.
2. The stent for a blood vessel of claim 1, wherein one or more blood passing holes 1 are punched in said artificial blood vessel A.
3. The stent for a blood vessel of claim 1, wherein a fixing hook 3 is formed at the top end portion of said upper cylindrical stent Bl protruded out of the artificial blood vessel A.
4. The stent for a blood vessel of claim 1, wherein said upper cylindrical stent Bl has a structure in which valley portions V of a topmost wire Wl composing the stent and peak portions P of a wire W2 located just below the topmost wire cross each other form rhombic cells 2.
5. The stent for a blood vessel of claim 1, wherein said lower cylindrical stent B3 has a structure in which peak portions P of a bottommost end wire WlO composing the stent and valley portions V of a wire W9 arrayed just above said bottommost end wire cross each other to form rhombic cells 2.
6. The stent for a blood vessel of claim 2, wherein the peak portions P of the wire W2 located just above said blood passing hole 1 and the valley portions V of the wire Wl located above it cross each other to form rhombic cells 2.
7. The stent for a blood vessel of claim 2, wherein valley portions V of a wire W3 located just below said blood passing hole 1 and peak portions P of a wire W4 located below it cross each other to form rhombic cells 2.
8. The stent for a blood vessel of claim 2, further comprising supporting wires S for connecting valley portions V of a wire located at the top end of the blood passing hole 1 lengthwise of the cylindrical stent and peak portions P of a wire located at the lower end of the blood passing hole 1 are installed respectively on the left and right of said blood pεLSsing hole 1.
PCT/KR2008/003635 2008-04-11 2008-06-25 Stent used in blood vessel WO2009125899A1 (en)

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KR101116052B1 (en) * 2010-02-03 2012-02-22 연세대학교 산학협력단 Bended Artificial Blood Stent Graft with Cylinder Shape
KR20240078575A (en) 2022-11-23 2024-06-04 강성권 Multi-layered covered vascular stent and the manufacturing method of this

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WO2013059623A1 (en) * 2011-10-21 2013-04-25 Merit Medical Systems, Inc. Devices and methods for stenting an airway
US9539083B2 (en) 2011-10-21 2017-01-10 Merit Medical Systems, Inc. Devices and methods for stenting an airway

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