66results about "Bile ducts" patented technology

A stent, such as transluminal stent, is disclosed. The stent includes a tubular member with a proximal end, a distal end, and a central portion therebetween. The elongate tubular member comprises a scaffolding forming a plurality of cells and defining a lumen of the elongate tubular member. A proximal portion of the tubular member forms a retention member, wherein the diameter of the retention member is greater than the diameter of the central portion, and wherein a proximal end of the retention member includes an area of increased scaffolding density.

A stent including a tubular body formed of one or more interwoven wires, a first anchor member disposed adjacent the first open end of the stent, a second anchor member disposed adjacent the second open end of the stent, and at least one divider disposed between the first and second anchor members. The first and second anchor members and the divider extend radially outward from the tubular body to divide the tubular body into at least a first saddle region extending between the first anchor member and the divider and a second saddle region extending between the second anchor member and the divider.

A tissue luminal stent is provided comprising a body having an elongated tubular configuration and a deployed configuration.SOLUTION: A tissue lumen stent includes a body having an elongated tubular configuration and a deployed configuration. When deployed, each of the first end and the opposite second end of the body expands into the first and second flange structures, leaving a generally cylindrical saddle region therebetween. At least one of the first and second flange structures has at least first and second inflection points defining first and second segments of the flange structure, wherein an angle of the first inflection point defined by the first segment and the cylindrical saddle region is at least as large as an angle of the second inflection point defined by the first segment and the second segment. The first segment includes a portion of increasing diameter and the second segment includes a portion of decreasing diameter.SELECTED DRAWING: Figure 10B

An example of a biodegradable biliary stent may comprise an elongated tubular member having a first end region, a second end region, and an intermediate region disposed therebetween, the elongated tubular member comprising at least one filament; and a biodegradable anchoring material that is coupled to and overlays a portion of the elongated tubular member, wherein the biodegradable anchoring material is coupled to and overlays at least to the first end region, the second end region, or both the first end region and the second end region.

[Problem] Provision of an insertion system that is advantageous in reducing the withdrawal resistance of an internal catheter. [Solution] Delivery system, equipped with: an inner catheter 22; an outer catheter 24 through which the inner catheter 22 is passed and in which a first side hole 24b is formed; a tubular stent 10, which is arranged on a distal end side with respect to the outer catheter 24, wherein the inner catheter 22 is passed through the tubular stent 10; and a first thread-like element 16 which is inseparably connected to the tubular stent 10, wherein at least one section of the first thread-like element 16 runs between the inner catheter 22 and the outer catheter 24 on a side which is closer to the proximal end than the first side hole 24b, and wherein the first thread-like element 16 is passed through the first side hole 24b and is arranged outside the outer catheter 24 in at least a part of an axial region R from the distal end of the outer catheter 24 to the first side hole 24b.

To provide a medical stent and a stent delivery device capable of easily grasping the position of a distal end under radioscopy.SOLUTION: A medical stent includes a main body having a tubular member and a reinforcing member wound in a spiral shape and embedded between an inner peripheral surface and an outer peripheral surface of the tubular member, a first locking member having a first fixed end fixed to a distal end side of the main body and a first free end located outside the tubular member and extending from the first fixed end to the first free end, a second fixed end fixed to a proximal end side of the main body, and a second free end located outside the tubular member. A second locking member extending from a second fixed end to a second free end, The main body has a first region, a second region, and a third region in which winding pitches of the reinforcing material are different from each other, the first region is a region located between the distal end of the main body and the first fixed end, the second region is a region in which the reinforcing material is wound at a winding pitch larger than that of the first region, and the third region is a region in which the reinforcing material is wound at a winding pitch larger than that of the second region.SELECTED DRAWING: Figure 3

A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain a medical image related to the pancreas. The processing circuitry is configured to extract a pancreas region included in the medical image. The processing circuitry is configured to extract at least one tubular structure region from the inside of the pancreas region. The processing circuitry is configured to identify a first end part and a second end part related to the pancreas on the basis of the pancreas region. The processing circuitry is configured to estimate a primary pancreatic duct centerline of the pancreas on the basis of the tubular structure region, the first end part, and the second end part.

Transluminal stents are disclosed herein. In some embodiments stents within the scope of this disclosure may comprise a first flared end, second flared end, and a middle region disposed between the first and second flared ends. The middle region may comprise a concave, curvilinear shape. The middle region may include a first portion, a second portion, and a circumferential ridge disposed between the first and second portions. The first flared end may include a first inner shoulder extending between the middle region and a first crest, a first opening, and a first outer taper extending between the first crest and the first opening. Methods of using the transluminal stents are also disclosed herein.

The present invention relates to a stent delivery device having: a first support rod into which a first movable body is inserted; a fixed magnet; and a second support rod into which a second movable body is inserted, wherein a first driving magnet included in the first movable body and a second driving magnet included in the second movable body rotate relative to each other by means of the control of an external magnetic field at a predetermined angle around an axis in a first direction with respect to the fixed magnet, thereby separating a first coupling piece and a second coupling piece from a first coupling groove and a second coupling groove and enabling a stent to unfold.

A polymeric stent is disclosed that includes a polymeric tubular body extending from a distal region to a proximal region, the polymeric tubular body adapted to have a negative Poisson's ratio. A distal engagement feature is formed within the distal region and a proximal engagement feature is formed within the proximal region. Also disclosed is a delivery device for a polymeric stent, the delivery device comprising a tubular body having an outer surface adapted to receive the polymeric stent thereon. The distal stent engagement member is fixed relative to the tubular body and is adapted to releasably engage the distal engagement feature. The proximal stent engagement member is fixed relative to the tubular body and is adapted to releasably engage the proximal engagement feature. The tubular body is adapted to cause a change in distance between the distal stent-engaging member and the proximal stent-engaging member, thereby changing the length of the polymeric stent.

The present invention provides a medical device for forming an opening channel or access passage between body tubular lumens. [Solution] The present invention relates to a device that uses an elongated body, a proximal holding portion, and a distal holding portion to bring the muscle layers of a first body lumen and a second body lumen into contact and to form a long-term or permanent opening or access channel between them. The medical device comprises an elongated body that forms a lumen and includes a proximal portion, a distal portion, a certain length, and a certain diameter, wherein the elongated body 310 may have an elongated tubular form (e.g., a restrained form, an unexpanded form, or a transport form) and a retracted form (e.g., an unrestrained form, an expanded form, or an unfolded form) in which the proximal portion 312 expands radially into the proximal holding portion 314 and the distal holding portion 322 expands radially into the distal holding portion 324, with a cylindrical saddle portion 328 extending between them.

The present invention provides a plastic stent comprising: a front end part formed in a tube shape such that an inlet is formed at one side thereof; a central part having one side integrally extending from the front end part; and a rear end part integrally extending from the other side of the central part, and having an outlet formed at the end of a flow path communicating with the inlet, wherein the front end part and the rear end part provide different restoring angles or restoring forces with respect to the central part. In addition, the present invention provides a plastic stent comprising: a front end part formed in a tube shape such that an inlet is formed at one side thereof; a central part having one side formed in a tube shape so as to be integrated with the front end part; a rear end part which is integrally formed in a tube shape on the other side of the central part and which has an outlet communicating with the inlet; and a marker part for encompassing, with a metal material, the outer peripheral surface of at least one or more of the front end part, the central part and the rear end part.

A medical stent whose distal end position can be easily checked under X-ray fluoroscopy, and a stent delivery device are provided. The medical stent includes a main body including a tubular member and a reinforcing material that is wound in a spiral shape and embedded between an inner circumferential surface and an outer circumferential surface of the tubular member, a first locking member that includes a first fixed end fixed to a distal end side of the main body and a first free end located on an outer side from the tubular member, and extends from the first fixed end to the first free end, and a second locking member that includes a second fixed end fixed to a proximal end side of the main body and a second free end located on the outer side from the tubular member, and extends from the second fixed end to the second free end, wherein the main body includes a first region, a second region, and a third region that have different winding pitches of the reinforcing material different from one another, the first region is a region located between the distal end of the main body and the first fixed end, the second region is a region in which the reinforcing material is wound with a greater winding pitch than the first region, and the third region is a region in which the reinforcing material is wound with a greater winding pitch than the second region.

The invention provides a medical stent and a stent delivery device, wherein the position of the front end can be easily grasped under X-ray fluoroscopy. A medical stent is provided with: a main body having a tubular member and a reinforcing material wound in a spiral shape and embedded between the inner peripheral surface and the outer peripheral surface of the tubular member; a first locking member having a first fixed end fixed to the front end side of the main body and a first free end located outside the tubular member, the first locking member extending from the former to the latter; and a second locking member having a second fixed end fixed to the base end side of the main body and a second free end located on the outside of the tubular member, the main body having a first region, a second region, and a third region in which the winding pitches of the reinforcement are different from each other, and the second locking member having a second fixed end fixed to the base end side of the main body and a second free end located on the outside of the tubular member. The first region is a region between the front end of the main body and the first fixed end, the second region is a region in which the reinforcement is wound at a winding pitch larger than that of the first region, and the third region is a region in which the reinforcement is wound at a winding pitch larger than that of the second region.

A stent system includes a self-expanding endoprosthesis and a stent delivery system including an elongate shaft having an inflatable balloon disposed proximate a distal end, and an endoprosthesis retention element disposed around the self-expanding endoprosthesis and the inflatable balloon. The retention element is configured to constrain the endoprosthesis in a radially collapsed configuration. The retention element is configured to fracture upon inflation of the balloon. The endoprosthesis is configured to exert a first radially outward force in the radially collapsed configuration. The retention element is configured to fracture when a second radially outward force greater than the first is applied to the retention element. The retention element includes a tubular sleeve disposed radially outward of and in intimate contact with the endoprosthesis, wherein the tubular sleeve is configured to break apart when the balloon is shifted toward the inflated configuration.

The present invention comprises: an inner catheter 22; an outer catheter 24 through which the inner catheter 22 is passed and in which a first side hole 24b is formed; a tube stent 10 which is disposed distally relative to the outer catheter 24 and through which the inner catheter 22 is passed; and a first thread-like member 16 which is non-releasably coupled to the tube stent 10 and at least a part of which is passed between the inner catheter 22 and the outer catheter 24 at a position more proximal than the first side hole 24b. The first thread-like member 16 is passed through the first side hole 24b and is disposed on the outer side of the outer catheter 24 in at least a part of an axial range R from the distal end of the outer catheter 24 to the first side hole 24b.

An example of a biodegradable biliary stent may comprise an elongated tubular member having a first end region, a second end region, and an intermediate region disposed therebetween, the elongated tubular member comprising at least one filament; and a biodegradable anchoring material that is coupled to and overlays a portion of the elongated tubular member, wherein the biodegradable anchoring material is coupled to and overlays at least to the first end region, the second end region, or both the first end region and the second end region.

Medical devices and method for making and using the same are disclosed. An example medical device may include implantable medical device for use along the biliary and / or pancreatic tract. The implantable medical device may include a tubular member having a first end configured to be disposed within the duodenum of a patient and a second end configured to be disposed adjacent to a pancreatic duct and / or bile duct. The tubular member may have a body including one or more wire filaments that are woven together. The tubular member may also have an outer surface with a longitudinal channel formed therein.

Medical systems for positioning a stent along a tissue pathway are disclosed. A system includes an inner shaft having a lumen, a proximal end coupled to the handle and a distal end coupled to a tip member. The system also includes an outer shaft having a proximal end region and a lumen, wherein at least a portion of the inner shaft extends within the lumen of the outer shaft. The system also includes a stent positioned between an inner surface of the outer shaft and an outer surface of the inner shaft. Further, the tip member includes a first engagement member configured to engage and anchor the tip member to a tissue of the tissue pathway before the stent engages the tissue pathway.

Devices, methods, and kits are presented that allow for simplified stent placement and stent retention in a biological vessel other than a blood vessel, and especially biliary stent placement in an antegrade manner. The devices and methods advantageously allow for shortened imaging and stent placement time, and substantially improve tolerability and / or retention of the stent in the vessel, and in further beneficial aspects, contemplated stents form a composite fluid path to facilitate drainage of the vessel. Still further, the devices and methods presented herein reduce or even entirely eliminate partial deflation of the peritoneal space during imaging and stent placement and so prevent exposure of operating personnel to vented gases carrying harmful agents.

A biliary stent includes an expandable stent body that is expandable from a pre-deployment collapsed configuration to a post-deployment expanded configuration and a spun coating that is disposed over at least part of the expandable stent body. The spun coating includes a plurality of fibers defining interstices therebetween. The spun coating is adapted to impact tissue ingrowth. The spun coating may be adapted to encourage tissue ingrowth. The spun coating may be adapted to discourage tissue ingrowth.

The present invention provides a stent comprising an elongate body having a proximal end, a distal end, at least one open helical channel formed on an outer surface of the body to provide fluid communication between the proximal end and the distal end, and a central lumen open at the proximal and distal ends of the stent for passage of a guidewire, the stent (1900) comprises an anti-movement device (1904) located near the end of the stent (1900) and expanding outwards from an elongated body of the stent (1900) and at least two anti-movement tail wings (1910) located at the tail end of the stent (1900) and extending beyond at least one end of the elongated body in the longitudinal direction; alternatively, the bracket (1900) includes at least two anti-movement tail wings (1910) located at the rearmost end of the bracket (1900) and extending in the longitudinal direction beyond at least one end of the elongated body.

An illustrative stent includes an elongate tubular member including at least one strut forming a tubular wall having a plurality of cells extending through a thickness of the tubular wall. The elongate tubular member may be configured to move between a radially collapsed configuration and a radially expanded configuration. A coating may be disposed on the elongate tubular member and across at least some of the plurality of cells. One or more magnetic components may be disposed on or within the coating.

The present invention relates to a system and method for creating channels between tissue walls of various thicknesses using stents. The stent includes an elongate body (100) having a restrained position and an expanded position, wherein in the expanded position, a proximal portion (110) of the body expands into a proximal retention member (112), a distal portion (120) expands into a distal retention member (122), and a cylindrical saddle region (130) extends between the proximal and distal retention members. The proximal retention member, the distal retention member, and the cylindrical saddle region can form an open internal passage (140) configured to allow flow therethrough. The proximal retention member can include first and second flanges (114, 116) spaced apart by a first distance (W1), and the distal retention member can include third and fourth flanges (124, 126) spaced apart by a second distance (W2), the first distance being greater than the second distance.

To provide a composition-guided navigation by performing biological or chemical analysis of an anatomical matter.SOLUTION: A biliary diagnostic device 132 comprises a biliary diagnostic sensor 144 for analyzing biological matter in contact with a tubular body including an internal lumen 158. A method of guiding an endoscope to a bile duct comprises inserting the endoscope into a duodenum, engaging a sensor with biological matter, electrically analyzing biological matter with the sensor to identify an electrical parameter, identifying liver bile in the biological matter from the electrical parameter, and guiding the endoscope through the duodenum based on the bile. A method of identifying biological matter comprises engaging a medical device sensor with biological matter in a bile duct, electrically analyzing biological matter with the sensor to identify an electrical parameter, identifying biological matter from a liver, pancreas or gall bladder from the electrical parameter, and outputting indicia of the biological matter to a user of the medical device.SELECTED DRAWING: Figure 6A

A tissue luminal stent is provided comprising a body having an elongated tubular configuration and a deployed configuration.SOLUTION: A tissue lumen stent includes a body having an elongated tubular configuration and a deployed configuration. When deployed, each of the first end and the opposite second end of the body expands into the first and second flange structures, leaving a generally cylindrical saddle region therebetween. At least one of the first and second flange structures has at least first and second inflection points defining first and second segments of the flange structure, wherein an angle of the first inflection point defined by the first segment and the cylindrical saddle region is at least as large as an angle of the second inflection point defined by the first segment and the second segment. The first segment includes a portion of increasing diameter and the second segment includes a portion of decreasing diameter.SELECTED DRAWING: Figure 10B

The present disclosure provides an endoprosthesis where a preferably polymeric coating has a number of surface features such as protrusions or textures that are arranged in a micropattern. The endoprosthesis optionally has an expanded state and a contracted state, and in some cases includes a stent with a polymeric coating attached to an outer surface of the stent. The stent may have an inner surface defining a lumen, an outer surface, and a stent thickness defined between the inner surface and outer surface. The stent may comprise a plurality of surface textures extending from the stent surfaces, wherein the textures are arranged in a macropattern.

A polymeric stent includes a polymeric tubular body extending from a distal region to a proximal region, the polymeric tubular body adapted to have a negative Poisson's ratio. A distal engagement feature is formed within the distal region and a proximal engagement feature is formed within the proximal region. A delivery device for the polymeric stent includes a tubular body having an outer surface adapted to accommodate the polymeric stent thereover. A distal stent engagement member is secured relative to the tubular body and is adapted to releasably engage the distal engagement feature. A proximal stent engagement member is secured relative to the tubular body and is adapted to releasably engage the proximal engagement feature. The tubular body is adapted to affect a change in a distance between the distal stent engagement member and the proximal stent engagement member, thereby changing a length of the polymeric stent.

Medical stent designs are disclosed. An example stent includes a tubular scaffold having a proximal end and a distal end. The tubular scaffold includes a first filament extending between the proximal end and the distal end, the first filament including a first biodegradable region positioned adjacent to a second biodegradable region. Further, the first biodegradable region includes a first biodegradable material, the first biodegradable material having a first rate of degradation. The second biodegradable region includes a second biodegradable material, the second biodegradable material having a second rate of degradation, wherein the first rate of degradation is different from the second rate of degradation.