120results about "Bile ducts" patented technology

A stent device includes a stent formed in a tubular shape by weaving wires and a cover covering at least a part of the stent. The cover is partially bonded to parts rather than a whole surface of the stent.

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.

The present disclosure relates generally to the field of medical devices and establishing fluid communication between body lumens. In particular, the present disclosure relates to devices and methods for placing the muscularis layers of first and second body lumens in contact to establish a long term or permanent open flow or access passage therebetween.

According to an aspect, a method of cholecystitis treatment includes: forming a communication hole that communicates a gallbladder and a duodenum; and arranging a bypass tube extending from a cystic duct to the duodenum through an inside of the gallbladder and the communication hole.

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 stent is disclosed that has an elongated body composed of a bioabsorbable polymer having a proximal end, a distal end, two open spiral channels formed on the exterior surface of the body to provide fluid communication between the proximal end and the distal end. The stent also has a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire. A method for using the stent and a kit containing the stent are also disclosed.

The invention discloses a biliary tract stent with a positioning structure for hepatobiliary pancreatic surgery, relates to the technical field of biliary tract stents.The biliary tract stent is suitable for treating biliary tract stenosis or obstruction, and comprises a tubular stent body and the positioning structure, the positioning structure comprises a Y-shaped anchoring protrusion and a developing mark, the Y-shaped anchoring protrusion is arranged on the outer wall of the stent, and the developing mark is arranged on the outer wall of the stent. Both the cross section and the vertical section are Y-shaped, the embedding force with the inner wall of the biliary tract is remarkably enhanced, the postoperative displacement risk is reduced, the developing mark adopts iodine-doped polylactic acid or gold rings and tantalum particles, X-ray and ultrasonic bimodal developing is supported, the intraoperative positioning accuracy is improved, the stent body and the anchoring protrusions can be made of degradable materials, the degradation performance is excellent, and the stent is suitable for popularization and application. The stent is suitable for short-term implantation, does not need to be taken out through a secondary operation and is good in biocompatibility, the surface of the stent can be coated with a hydrophilic or antibacterial coating, and inflammation and infection risks are reduced. The manufacturing process adopts extrusion molding, laser cutting, injection molding, hot pressing or mechanical embedding, the process is simplified, the efficiency is high, and the method is suitable for micro bracket production.

A stent is disclosed that has an elongated body composed of a bioabsorbable polymer having a proximal end, a distal end, two open spiral channels formed on the exterior surface of the body to provide fluid communication between the proximal end and the distal end. The stent has a central lumen open at the proximal and distal ends of the stent for the passage of a guide wire. The stent also has an anti-migration device used for immobilization of the stent at the target site.

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

Medical devices and methods for using medical devices are disclosed. An example medical device includes a scaffold including an inner surface, an outer surface, a proximal end region, a distal end region, a lumen extending from the proximal end region to the distal end region, and a retention member extending radially away from the outer surface. The retention member has a distally facing surface and a proximally facing surface. A membrane is disposed within the lumen of the tubular scaffold and is secured to the inner surface of the tubular scaffold at a first circumferential attachment region and at a second circumferential attachment region. Further, the membrane is unattached to the inner surface of the tubular scaffold between the first circumferential attachment region and the second circumferential attachment region to define a tissue ingrowth region between the inner surface of the tubular scaffold and an outwardly-facing surface of the membrane.

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.

An implantable medical device comprising an elongated body having a first end, a second end, and a lumen extending therebetween, a saddle region defined between the first end and the second end, a retention member at the first end, the second end, or both, wherein the retention member extends substantially traverse to a longitudinal axis of the implantable medical device and is configured to deform responsive to an application of a force along a longitudinal axis of the implantable medical device.

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.

The stent device has a stent cover joined to the stent wires forming the stent body at a plurality of junctions distal to the intersection of the stent wires. By apportioning the junctions to the stent wires between the intersection portions, axial flexibility of the stent device is maintained. The stent cover joined by the disclosed junctions helps prevent luminal tissue from penetrating the stent body and occluding the stent, and placement of the junctions joining the stent cover to the stent device provides a change in positive outcomes for the covered stent device and the patient in which the stent device is placed.

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.

A delivery endcap assembly is adapted for use with a biliary access device and is adapted to permit a medical device to be delivered through the biliary access device. The delivery endcap assembly includes a securement portion adapted to be releasably securable to a proximal end of the handle after the one or more removable components have been removed from the handle, a tapered portion extending proximally from the securement portion, a rotation hub adapted to be coupled to the securement portion, a valve adapted to be coupled to the rotation hub and a lumen extending through the delivery endcap assembly, wherein the lumen extending through the delivery endcap assembly is adapted to permit a medical device within an introducer sheath to be advanced through the biliary access device.

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.

A stent delivery device that can be inserted into an endoscope. The device includes a guide catheter including a guide tube, an operating wire, and a joint portion that joins the guide tube and the wire. The device also includes a pusher catheter including a first tube through which the wire is inserted and a second tube through which the guide tube is inserted. The device may include a bite prevention portion that can prevent the wire from biting into an inner surface of the second tube. In a state where a distal end of the pusher catheter protrudes from the endoscope channel and the channel includes a curved portion in a curved state, a proximal end of the guide tube, which includes the joint portion, and / or the bite prevention portion can be positioned proximal of a proximal end of the curved portion in the endoscope channel.

A system, comprising an outer catheter, the outer catheter including a proximal end, a distal end; and a lumen extending therebetween; a first marker and a second marker; an inner catheter slidably disposed within the lumen of the outer catheter; and a stent disposed over the inner catheter, the stent being configured to transition from a first configuration to a second configuration when not disposed within the lumen of the outer catheter, the stent comprising a proximal retention member when in the second configuration; wherein the outer catheter is proximally retractable together with the inner catheter and the stent with respect to a reference position within a body lumen; wherein the first marker is positioned with respect to the outer catheter, inner catheter, or both, and with respect to the stent, such that confirmation within the body lumen of the first marker proximal to the reference position denotes that the entire proximal retention member is deployable proximally relative to the reference position.

A stent delivery system comprising an elongate tubular member (114) having an outer surface and a lumen formed therein, a needle (120, 116) slidably disposed within the lumen of the elongate tubular member, a stent (102) disposed on an outer surface of the needle distal of the elongate tubular member, and a suture loop (350) attached to the distal end of the elongate member, wherein the suture loop is configured to be inserted through an opening in an outer surface of the stent to circumferentially surround the outer surface of the needle.