173results 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.

The invention discloses a biliary tract stent capable of being accurately released, which comprises a stent far end, a stent straight section and a stent near end which are connected in sequence, the number of layers of the stent is at least one, and the stent far end and the stent near end are made of materials with different colors. The number of layers of the stent is one, the materials of the stent far end, the stent straight section and the stent near end of the stent comprise but are not limited to silicone rubber, polyurethane, polyethylene, nylon or modified nylon Pebax, and the material hardness of the stent far end, the stent straight section and the stent near end of the stent ranges from Shore 25D to Shore 72D. Compared with a traditional stent of the same specification, the biliary tract stent capable of being accurately released has the advantages that the cross sectional area of an inner cavity is larger by 40%-100%, meanwhile, the inner surface of the stent is made of the super-smooth material, a biological membrane and bile mud are not prone to being attached, and the smooth time of the biliary tract stent is greatly prolonged.

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.

The present invention provides a thermal puncture stent introducer. The stent introducer has a proximal end and a distal end. An outer tube is provided at the distal end of the front handle and extends from the proximal end to the distal end. The outer diameter of the distal end of the outer tube is less than or equal to 3.15 mm. An insulating middle tube is provided inside the outer tube, and a conductive part is provided inside the insulating middle tube. The insulating middle tube and the conductive part extend from the proximal end to the distal end. The proximal end of the conductive part can be connected to an external power supply. A boosting tube is provided between the proximal end of the outer tube and the insulating middle tube. The distal end of the boosting tube is connected to the proximal end of the insulating middle tube. An insulating part is provided at the distal end of the conductive part, and conductive heads are distributed on the insulating part. The conductive heads are connected to the conductive part to achieve the conductive function, and at the same time, the conductive part plays a role in supporting the stent. After the stent is compressed, it is located in the space between the distal end of the conductive part and the outer tube. The front handle is connected to the proximal end of the outer tube. By retracting the front handle along the boosting tube, the outer tube is driven to retract to release the stent.

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 method of forming an access route to the bile duct includes: forming a tunnel extending from an oral ridge of a duodenal papilla, which is located on an oral side of a natural opening of a duodenal papilla, to the bile duct; and dilating a lumen of the tunnel more than when it was formed.

This application relates to the technical field of medical devices and discloses a plastic biliary stent, comprising a stent body, a delivery unit, and a guidewire. The stent body comprises a main tube, a first wing, and a second wing. The first wing is disposed at the distal end of the main tube, and the second wing is disposed at the proximal end of the main tube. The ends of the first and second wing adjacent to each other can be unfolded relative to the main tube. The delivery unit comprises a sheath tube and an inner tube. The inner tube moves within the sheath tube, and the distal end of the inner tube includes a cutting head. The guidewire is sequentially passed through the main tube and the inner tube. The first wing is received in the main tube via a connecting line. The distal end of the sheath tube is sheathed over the main tube and receives the second wing. The distal end of the inner tube extends into the proximal end of the main tube, and the inner tube has a limiting mechanism for abutting the main tube to limit the main tube. This application can prevent the stent from scratching tissue during delivery.

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-deployment assembly for use with a guidewire comprises a biliary stent and an elongated stent-conveyance tube comprising a guidewire-retaining segment that includes respective distal and proximal apertures defining a guidewire-path therethrough, and a lengthways laterally-breachable portion. In a stent-advancement configuration, the guidewire passes through the respective apertures so as to interiorly traverse the guidewire-retaining segment, and the stent is arranged to surround a stent-conveyance tube segment that is proximally displaced from the guidewire-retaining segment, for advancement of the stent together with the stent-conveyance tube along the guidewire into a body lumen of a human subject. When the stent is disposed, in the stent-advancement configuration, at a target deployment location within the lumen, a proximal-direction withdrawal of the stent-conveyance tube is effective to cause the guidewire to breach the laterally-breachable portion of the guidewire-retaining segment so as to decouple the guidewire from the tube without longitudinal displacement of the guidewire.

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.

This document provides implantable intraluminal stent graft medical devices. In some embodiments, the stent graft devices provided herein are implantable in bodily conduits that have side branches, and the stent graft devices are operable to allow the flow of fluids between the conduit and the side branches. In some embodiments, the walls of the stent graft devices provided herein include compliant channels which allow for fluid communication between the interior and the exterior of the stent graft devices. In some embodiments, the compliant channels are configured to inhibit or reduce tissue ingrowth, tissue bridging, and / or endothelialization.

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 of using medical devices are disclosed herein. An example medical device includes a skeleton including an inner surface, an outer surface, a proximal region, a distal region, a lumen extending from the proximal region to the distal region, and a retention member extending radially away from the outer surface. The retaining member has a distally facing surface and a proximally facing surface. A membrane is disposed inside the lumen of the tubular skeleton, and the membrane is secured to the inner surface of the tubular skeleton at a first circumferential attachment region and a second circumferential attachment region. Further, the membrane is not attached 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 the outwardly facing surface of the membrane.

A stent-deployment assembly includes an elongated stent-conveyance tube comprising a hollow longitudinal lumen configured to have a guidewire traverse longitudinally therethrough. The stent is arrange

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.

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.

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.

A delivery device for implanting a shunt device in a tissue wall includes an actuation arm extending through the delivery device, the actuation arm configured to seat an arm of the shunt device on the tissue wall, and a wavy release wire extending through the actuation arm, wherein the wavy release wire includes a wavy portion that forms a friction fit with the actuation arm.

An apparatus may include a catheter and a support tube. The catheter includes a lumen extending therethrough. The catheter may be sized and shaped to be extendable through the endoscope shaft to a target tissue within a living body. The lumen may be sized and shaped to receive a piercing device therethrough. The catheter includes a first catheter portion distal to a second catheter portion. The first conduit portion and the second conduit portion are made of different materials. The first catheter portion has a flexible curved distal end. The tube is secured about the outer surface of the distal end of the first catheter portion and the outer surface of the distal end of the second catheter portion.