WO2015199289A1 - 외부유로가 형성된 스텐트 - Google Patents
외부유로가 형성된 스텐트 Download PDFInfo
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- WO2015199289A1 WO2015199289A1 PCT/KR2014/009837 KR2014009837W WO2015199289A1 WO 2015199289 A1 WO2015199289 A1 WO 2015199289A1 KR 2014009837 W KR2014009837 W KR 2014009837W WO 2015199289 A1 WO2015199289 A1 WO 2015199289A1
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- stent
- film
- stent body
- conduit
- coating layer
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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
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
-
- 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
- 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
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure 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
- A61F2/86—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
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2002/041—Bile ducts
-
- 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
- A61F2002/068—Modifying the blood flow model, e.g. by diffuser or deflector
-
- 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
- A61F2002/072—Encapsulated stents, e.g. wire or whole stent embedded in lining
-
- 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
- A61F2220/005—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
-
- 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
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
-
- 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
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
-
- 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
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0015—Kidney-shaped, e.g. bean-shaped
-
- 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
- A61F2230/005—Rosette-shaped, e.g. star-shaped
Definitions
- the present invention relates to a stent, and more particularly, to facilitate the flow of body fluids such as blood or pancreatic fluid by securing an inner diameter of a conduit such as a bile duct, a blood vessel or a pancreatic duct, and a branched blood vessel such as a branched blood vessel, an intrahepatic bile duct or a gallbladder duct.
- the body fluid flowing from the branched conduit is also formed with an external flow path to flow along the conduit, allowing fluid to flow into and out of the stent at the same time, while flexing flexibly according to the conduit's shape to reduce friction to the lesion. It is about.
- the stent should be smoothly crimped and expanded around the perimeter to facilitate insertion into the conduit.
- the stent is manufactured by crossing a plurality of wires with each other, or is configured in a shape in which a plurality of holes are formed on a surface by a laser pattern. Therefore, when the stent is installed at the stenosis, a phenomenon occurs in which the tissue at the stenosis protrudes into the stent through the hole in the stent surface due to the pressure caused by the expansion of the stent.
- the stent has a plurality of holes having a rectangular shape on its surface by crossing a plurality of wires with each other. And it is configured to seal the hole by coating as a whole using silicon or the like so as to prevent the tissue of the installation site from protruding into the stent through the hole. Through this, the stent can be stably fixed to the installation site while preventing the tissue from protruding into the stent.
- a method of sealing the hole of the stent is manufactured by dipping the stent into liquid silicone or the like, or by separately preparing a film of silicon or polyurethane and covering the outer peripheral surface of the stent to cover the stent.
- a method of securing both ends to the stent using sutures is commonly used.
- the film-based method is cumbersome in that it is necessary to additionally suture not only the stent but also the medical device product license, and the process of bonding and fixing the film to the stent by using the suture adds to the cost and time of manufacturing the stent. There is a problem that rises.
- body fluids such as blood or pancreatic fluid may flow smoothly into the stent, but such as a hepatic bile duct or a gallbladder duct branch or the like Body fluids flowing into the conduit through the branched conduit has a difficult flow.
- the present invention is to solve the conventional problems, to ensure the flow of body fluids, such as blood or pancreatic fluid by securing the inner diameter of the conduit, such as bile ducts, blood vessels or pancreatic ducts, while branched vessels, hepatobiliary ducts or gallbladder
- the body fluid flowing from the branched conduit is also formed with an external flow path to flow along the conduit, allowing fluid to flow into and out of the stent at the same time, while flexing flexibly according to the conduit's shape to reduce friction to the lesion.
- the purpose is to provide.
- the stent for achieving the object of the present invention as described above comprises a plurality of holes are formed on the surface, the inside has a stent body having a circumferential portion formed with a hollow and a cover portion provided to surround one side of the outer peripheral surface of the stent body, The stent body is formed with an external flow path that provides a path through which the body fluid secreted from the branch conduit can flow along the longitudinal direction of the stent body to the outside of the cover portion.
- the outer flow passage may be formed with a depression on one side of the circumference of the stent body, and the depression may be formed along the longitudinal direction of the stent body so that the body fluid secreted from the branch conduit may flow through the depression.
- the outer flow passage is formed on one side of the circumference of the stent body
- the protrusion is formed along the longitudinal direction of the stent body along the separation space formed between the stent body and the conduit by the protrusion The body fluid secreted from the branch conduit may flow.
- the external flow path may be provided in plurality.
- the outer flow path is formed such that the depressions and protrusions are repeated along the circumference of the stent body, and the depressions and protrusions are formed along the longitudinal direction of the stent body, and the diameters of the depressions and protrusions are different.
- the body fluid secreted from the branched conduit may flow through the separation space formed between the stent body and the conduit.
- the stent body may be formed to extend at least one end of the both ends to prevent the separation from the central portion.
- the cover part may include a film provided to surround one side of the outer circumferential surface of the stent body, and a coating layer provided to coat both ends of the stent and fix the film to the stent body.
- the coating layer may be formed at both ends of the stent body to a depth at which the ends of the film overlap a predetermined portion so that the coating layer is cured, and both ends of the film may be fixed to the stent body.
- the stent of the present invention has the following effects.
- the film and the coating layer to close the hole of the stent surface has the effect of preventing the phenomenon of the tissue of the constriction site protrudes into the stent through the hole of the stent surface.
- FIG. 1 is a perspective view of a stent in accordance with the present invention.
- 2 to 4 is a side view showing a process of bonding a film to the stent body according to the present invention
- 5 and 6 are photographs showing a perspective view of the stent according to the present invention.
- FIG. 7 is a partial perspective view of a stent according to a first embodiment of the present invention.
- FIG. 8 is a cross-sectional view showing a usage of the stent according to the first embodiment of the present invention.
- FIG. 9 is a partial perspective view of a stent according to a second embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing a usage of the stent according to the second embodiment of the present invention.
- FIG. 11 is a partial perspective view of a stent according to a third embodiment of the present invention.
- FIG. 14 is a cross-sectional view showing a usage of the stent according to the third embodiment of the present invention.
- the stent 10 according to the present invention includes a cover part 200 that largely surrounds one side of the stent body 100 and the outer circumferential surface of the stent body 100 to block a hole formed in the stent body 100. It is composed.
- the stent main body 100 has a periphery having a hollow formed therein, and the periphery has a plurality of wires crossed or formed by a laser pattern. Such a stent body 100 is formed with a plurality of holes on the surface by the intersection of the wires or the laser pattern.
- the periphery of the stent body 100 is configured to form a plurality of holes by the intersection of the wires or the laser pattern can be easily compressed or expanded.
- body fluids such as blood or pancreatic fluid.
- the stent body 100 of the present invention is formed through the intersection of the wire, the circumference portion so that the entire cross section is formed in a circular shape. This is to prevent the edge portion is formed so as not to be stimulated in the stent 10 installation site tissue.
- the cross-section of the stent body 100 of the present invention is made in a circular shape as a whole, a protrusion or depression is formed on one side, such a protrusion or depression is formed entirely along the longitudinal direction of the stent body 100 branch basin conduit It is configured to provide a space in which the body fluid ejected at 510 can flow.
- both ends of the stent body 100 is provided with a Lasso (not shown) to facilitate the removal of the installed stent 10 later.
- Lasso is commonly used in the art, and detailed description thereof will be omitted.
- the external flow path 300 may be formed along the longitudinal direction of the stent body 100 in a variety of cross-sectional shapes, such as the configuration of the external flow path 300 to be described in more detail by embodiment do.
- At least one end of both ends of the stent main body 100 may be formed with an extension (not shown) having a relatively larger area than the central portion. That is, the stent 10 may be stably fixed to the installation portion of the conduit 500 because the expansion portion is formed.
- the extension may be formed to be stepped at the center, or may be formed to be inclined toward the outside by the inclined surface. If the expansion part is formed to be stepped, it is possible to reduce the foreign feeling felt by the subject when installing the stent 10 by forming a plurality of steps that gradually increase in area toward the outside.
- the cover part 200 is provided to cover one side of the outer circumferential surface of the stent main body 100, and blocks a hole formed in the surface of the stent main body 100 so that the tissue of the stenosis is placed through the hole of the surface of the stent 10. It is a device to prevent protruding into the inside.
- the cover unit 200 may be any device commonly used in the art as long as the device can achieve the above object. However, it is preferable to use the film 210 and the primary coating layer 220 together to bend flexibly according to the shape of the conduit 500.
- the film 210 is a device for covering a plurality of holes of the stent main body 100 by wrapping the stent main body 100 on one side of the outer circumferential surface, preferably the stent main body 100 as a whole.
- the film 210 may be used any film 210 as long as it can achieve the above object.
- a pipe shape having an inner diameter corresponding to the outer diameter of the stent main body 100 is wrapped around the outer surface of the polytetrafluoroethylene (PTFE: Polytetrafluoroethylene / Teflon) rod to surround the cloth, synthetic resin, rubber, silicone, or polyurethane. It is preferable to manufacture and use the film 210.
- PTFE Polytetrafluoroethylene
- the method of manufacturing the above-described film 210 is merely an example, and the present invention is not limited thereto, and any film 210 may be used as long as it is commonly used in the art.
- the length of the film 210 is relatively short compared to the length of the stent body 100, or preferably formed of the same length.
- the primary coating layer 220 is formed so as to overlap a predetermined length with both ends of the film 210 at one side of the stent body 100, preferably at both ends of the stent body 100, the film 210 to the stent body 100. At the same time, the film is formed on one side of the stent body 100 that is not provided with the film 210.
- the film is formed of a sealing material such as silicon, and in general, the primary coating layer 220 is a method of spraying silicon by a dipping process or spraying so that the stent body 100 is exposed to impregnation with liquid silicon. do.
- the secondary coating layer 230 may be additionally formed on the outer circumferential surface of both ends of the film 210 through a brush or spray in order to more stably bond the film 210 bonded through the primary coating layer 220 to the stent body 100. Like the primary coating layer 220, it may be formed by dipping.
- the secondary coating portion 231 may be formed to be the same as or shorter than the primary coating portion 221.
- FIG. 2 to 4 is a side view showing a process of bonding a film to the stent body according to the present invention.
- the stent body 100 is inserted into the film 210 so that the stent body 100 penetrates the film 210. Thereafter, the film 210 is collected into the central portion of the stent body 100. According to the use mode, the film 210 may be pushed in one direction of the stent body 100 without collecting the central portion of the stent body 100.
- both ends of the stent body 100 are coated by dipping in liquid silicone or polyurethane.
- the primary coating portion 221 formed on both ends of the stent body 100 is formed by a length that can overlap a portion of both ends of the film 210. That is, the length of the uncoated portion of the stent body 100 should be relatively shorter than the length of the film 210.
- both ends of the film 210 collected at the center or one end of the stent main body 100 are laid out so as to overlap with the primary coating sites 221 formed at both ends of the stent main body 100. . This process must be performed before all of the primary coating 221 is cured.
- the primary coating site 221 is cured to form the primary coating layer 220.
- the film 210 is bonded and fixed to one side of the stent body 100 by using the primary coating layer 220 as an adhesive in the process of curing the primary coating portion 221 so that the primary coating layer 220 is formed. do.
- the secondary coating layer 230 is formed on the outer circumferential surface of both ends of the film 210 bonded to the stent body 100 through the primary coating layer 220 to view the film 210.
- the secondary coating layer 230 may use a coating liquid of the same material as the primary coating layer 220 or a heterogeneous coating liquid according to the use mode.
- FIGS. 1, 5, and 6 are photographs showing a perspective view of the stent according to the present invention.
- the stent 10 manufactured by the above-described process is provided with holes formed at both ends of the stent body 100 by the primary coating layer 220.
- the central portion of the stent body 100 is configured to seal the hole by the film 210. Since the film 210 is easier to bend the stent body 100 in comparison with the primary coating layer 220, the stent 10 having the above-described configuration may have a conduit 500 as shown in FIG. 6. It can be bent smoothly in response to the shape or body movement of the subject.
- the primary coating layer 220 and the secondary coating layer 230 are formed only at both ends of the stent body 100, but depending on the usage, the primary coating layer 220 is spread over the entire surface of the stent body 100. It will be apparent that at least any one of) and the secondary coating layer 230 may be formed.
- FIG. 7 is a partial perspective view of a stent according to the first embodiment of the present invention.
- the cross section of the stent body 100 has a circular shape as a whole.
- a depression is formed at one side of the cross section of the stent body 100.
- the depression is formed entirely along the longitudinal direction of the stent body 100 to correspond to the cross-sectional shape.
- the recessed portion formed along the longitudinal direction of the stent main body 100 becomes the external flow path 300.
- a depression is formed at one side of the cross section of the stent body 100.
- the depression is formed entirely along the longitudinal direction of the stent body 100 to correspond to the cross-sectional shape. As described above, the recessed portion formed along the longitudinal direction of the stent main body 100 becomes the external flow path 300.
- the film 210 and the primary coating layer 220 may also be closely adhered to the stent main body 100 so as to maintain the external flow path 300 even after the film 210 and the primary coating layer 220 are configured.
- the corner portion of the depression is formed round so that the installation site is not stimulated by the corner portion of the depression.
- FIG. 8 is a cross-sectional view showing the use of the stent according to the first embodiment of the present invention.
- a branched conduit 510 such as a hepatic bile duct, a gallbladder branch, or a pancreatic bile duct is formed at one side of the conduit 500 so that the fluid discharged from the branched conduit 510 must flow through the conduit 500.
- the branched conduit 510 is blocked and the branched conduit 510 does not flow into the conduit 500 when the conventional fully sealed stent is used.
- the stent 10 according to the present invention has an external flow path 300 formed by a depression at a position corresponding to the branch conduit 510, the body fluid discharged from the branch conduit 510 is the external flow path 300. It can flow along the conduit 500 through.
- the body fluid may flow not only to the sealed interior of the stent 10 but also to the outside of the stent 10 through the external flow path 300. Through this, the body fluid discharged from the branch conduit 510 can also easily flow into the conduit 500 flows.
- FIG. 9 is a partial perspective view of a stent according to a second embodiment of the present invention.
- the stent body 100 according to the second embodiment of the present invention also has a circular cross section as a whole.
- a protrusion is formed at one side of the cross section of the stent body 100.
- These protrusions are formed as a whole along the longitudinal direction of the stent body 100 to correspond to the cross-sectional shape.
- Protrusions are preferably protruded in a semi-circle or semi-elliptic shape without corners so as not to stimulate the installation portion, it is preferable to round the corners.
- the film 210 and the primary coating layer 220 is as close as possible to the stent body 100 as in the first embodiment so that the external flow path 300 is not blocked by the film 210 or the primary coating layer 220. It is desirable to.
- FIG. 10 is a cross-sectional view showing the use of the stent according to the second embodiment of the present invention.
- the stent 10 is inserted such that the free space by the protrusion is positioned at a position corresponding to the position where the branch conduit 510 is connected to the conduit 500.
- a part of the outer circumferential surface of the stent 10 is not closely contacted with the inner wall of the conduit 500 by the protrusion, and a spaced portion is formed along the longitudinal direction of the stent 10.
- the free space formed by the separation becomes the external flow path 300 so that the body fluid discharged from the branch conduit 510 flows along the outside of the stent 10 and flows into the conduit 500.
- the body fluid may also flow to the outside of the stent 10 through the external flow path 300 as well as the sealed stent 10 according to the second embodiment. Through this, the body fluid discharged from the branch conduit 510 can also easily flow into the conduit 500 flows.
- FIGS. 11 and 12 and 13 are photographs showing a perspective view of a stent according to a third embodiment of the present invention.
- the outer flow path 300 is formed to have various shapes such as a star shape by repeatedly crossing the recesses and protrusions similar to the first and second embodiments described above. That is, the free space generated due to the difference in diameter due to the depression and the protrusion becomes the external flow path 300.
- the depressions and the protrusions may be repeatedly formed at equal intervals, and may be unbalanced depending on the use mode.
- FIG. 14 is a cross-sectional view showing a usage of the stent according to the third embodiment of the present invention.
- the protrusion is in close contact with the inner wall surface of the conduit 500, the depression is spaced apart from the inner wall surface of the conduit 500 to form a clearance.
- the free space generated in the recessed portion becomes the external flow path 300 so that the body fluid discharged from the branch conduit 510 flows in the longitudinal direction of the stent 10 and flows into the conduit 500. Can flow.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Vascular Medicine (AREA)
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Abstract
Description
Claims (8)
- 표면에 복수의 구멍이 형성되고, 내부에는 중공이 형성된 둘레부를 가지는 스텐트 본체; 및상기 스텐트 본체의 외주면 일측을 감싸도록 구비되는 커버부;를 포함하고,상기 스텐트 본체는 분지 도관에서 분비되는 체액이 상기 커버부의 외부로 상기 스텐트 본체의 길이 방향을 따라 유동할 수 있는 경로를 제공하는 외부유로가 형성되는 스텐트.
- 제 1항에 있어서,상기 외부유로는 상기 스텐트 본체의 상기 둘레부 일측에 함몰부가 형성되고, 상기 함몰부는 상기 스텐트 본체의 길이방향을 따라 형성되어 상기 함몰부를 통해 상기 분지 도관에서 분비되는 상기 체액이 유동하는 스텐트.
- 제 1항에 있어서,상기 외부유로는 상기 스텐트 본체의 상기 둘레부 일측에 돌출부가 형성되고, 상기 돌출부는 상기 스텐트 본체의 길이방향을 따라 형성되어 상기 돌출부에 의해 상기 스텐트 본체와 도관 사이에 형성되는 이격 공간을 따라 상기 분지 도관에서 분비되는 상기 체액이 유동하는 스텐트.
- 제 1항에 있어서,상기 외부유로는 복수로 구비되는 스텐트.
- 제 4항에 있어서,상기 외부유로는 상기 스텐트 본체의 상기 둘레부를 따라 함몰부 및 돌출부가 반복되도록 형성되고, 상기 함몰부 및 돌출부는 상기 스텐트 본체의 길이방향을 따라 형성되어 상기 함몰부 및 돌출부의 직경차이에 의해 상기 스텐트 본체와 도관 사이에 형성되는 이격 공간을 통해 상기 분지 도관에서 분비되는 상기 체액이 유동하는 스텐트.
- 제 1항에 있어서,상기 스텐트 본체는 이탈을 방지하기 위하여 양측종단부 중 적어도 어느 일단은 중심부 보다 확장되도록 형성되는 스텐트.
- 제 1항에 있어서,상기 커버부는,상기 스텐트 본체의 외주면 일측을 감싸도록 구비되는 필름; 및상기 스텐트 양측 종단부를 코팅하고, 상기 필름을 상기 스텐트 본체에 고정하기 위해 구비되는 코팅층;을 포함하는 스텐트.
- 제 7항에 있어서,상기 코팅층은 상기 스텐트 본체의 양측 종단부에 상기 필름의 종단이 일정 부분 중첩되는 깊이까지 형성되어 상기 코팅층이 경화되며 상기 필름의 양측 종단을 상기 스텐트 본체에 고정되도록 결합하는 스텐트.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2017518019A JP6496816B2 (ja) | 2014-06-26 | 2014-10-20 | 外部流路が形成されたステント |
US15/321,081 US10130460B2 (en) | 2014-06-26 | 2014-10-20 | Stent having exterior path |
EP14895684.0A EP3162325B1 (en) | 2014-06-26 | 2014-10-20 | Stent having exterior path |
CN201480080135.1A CN106470646A (zh) | 2014-06-26 | 2014-10-20 | 具有外部路径的支架 |
Applications Claiming Priority (2)
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KR10-2014-0078707 | 2014-06-26 | ||
KR1020140078707A KR101628711B1 (ko) | 2014-06-26 | 2014-06-26 | 외부유로가 형성된 스텐트 |
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WO2015199289A1 true WO2015199289A1 (ko) | 2015-12-30 |
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PCT/KR2014/009837 WO2015199289A1 (ko) | 2014-06-26 | 2014-10-20 | 외부유로가 형성된 스텐트 |
Country Status (6)
Country | Link |
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US (1) | US10130460B2 (ko) |
EP (1) | EP3162325B1 (ko) |
JP (1) | JP6496816B2 (ko) |
KR (1) | KR101628711B1 (ko) |
CN (1) | CN106470646A (ko) |
WO (1) | WO2015199289A1 (ko) |
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WO2020222363A1 (ko) * | 2019-04-29 | 2020-11-05 | 주식회사 에스앤지바이오텍 | 스텐트 |
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Also Published As
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US20170151051A1 (en) | 2017-06-01 |
EP3162325A4 (en) | 2018-01-24 |
EP3162325B1 (en) | 2020-12-02 |
KR101628711B1 (ko) | 2016-06-09 |
CN106470646A (zh) | 2017-03-01 |
EP3162325A1 (en) | 2017-05-03 |
JP6496816B2 (ja) | 2019-04-10 |
KR20160001038A (ko) | 2016-01-06 |
US10130460B2 (en) | 2018-11-20 |
JP2017521204A (ja) | 2017-08-03 |
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