The present disclosure relates to the field of endoscopy. Specifically, the present disclosure relates to systems and methods which allow the distal portion of a catheter to be visualized within the body using a colored marker and one or more secondary markers. In particular, the present disclosure relates to systems and methods which indicate when a medical device is properly positioned for deployment within a body lumen.

An endoprosthesis may include an expandable framework including a body portion disposed between a first end and a second end, and a bowl portion disposed along the body portion; and a polymeric cover disposed on at least a portion of the expandable framework. The bowl portion may include an inner surface and an outer surface spaced apart radially outward from the inner surface. The bowl portion may extend radially outward from the body portion. The inner surface of the bowl portion may be devoid of the polymeric cover.

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.

An implantable device including a metal substrate; that contains particles having a size of 1 μm or more; if the wall thickness of the metal substrate is greater than or equal to 0.04 mm and less than or equal to 0.12 mm, the largest particle size is less than or equal to 15 μm and the average content of the particles is less than or equal to 40 ppm; if the wall thickness of the metal substrate is greater than 0.12 mm and less than or equal to 0.2 mm, the largest particle size is less than or equal to 20 μm and the average content of the particles is less than or equal to 100 ppm; The size of the particles and the average content of the particles are reasonably controlled according to the wall thickness of the metal substrate, improving the plastic deformation capability of the implantable device.

Devices, systems and methods for compressing, cutting, incising, reconfiguring, remodeling, attaching, repositioning, supporting, dislocating or altering the composition of tissues or anatomical structures to alter their positional or force relationship to other tissues or anatomical structures. In some applications, the invention may be used to used to improve patency or fluid flow through a body lumen or cavity (e.g., to limit constriction of the urethra by an enlarged prostate gland).

A medical device for narrowing or closing an anatomical channel includes a band part (1) which can be placed around the body tissue (2) surrounding the anatomical channel and which can be closed to form a ring that encloses a through-opening (6) for the body tissue, wherein the band part (1) has a hollow chamber (3), and wherein the through-opening (6) can be made smaller by introducing a fluid into the hollow chamber (3). The medical device moreover includes a pump unit (10) which serves to convey the fluid and which has an electric drive (15) controllable by an electronic control system of the device, wherein a pressure value corresponding to the pressure of the fluid in the hollow chamber (3) or dependent on this pressure can be detected by the electronic control system. The device moreover has an air pressure sensor (23) for detecting the atmospheric pressure.

The present disclosure is related to medical devices, stents, drainage devices, and the like, which feature a doubled back design. Various embodiments described herein have a portion with overlapping layers, at least one of which may comprise a cover.

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 tubular indwelling device 1, which is placed in a living body lumen (bile duct) to define a tubular flow path, comprises: a tubular body part 2; and a valve part 3 that is provided on a downstream end part 2a of the tubular body part 2 in a flow direction of a fluid (bile) flowing through the living body lumen and has an outflow port 23 from which the fluid flows out. The valve part 3 further comprises, for example, a “V”-shaped guide part 30 that guides the insertion of a jig 200 (not illustrated) into the outflow port 23.

Provided is an in-vivo indwelling tube having a high flap strength and passing smoothly through a conduit of an endoscope. A tubular member having a proximal side and a distal side; a proximal flap, including a base end on a proximal side and a free end on a distal side, on the proximal side of the tubular member; and a distal flap, including a base end on a distal side and a free end on a proximal side, on the distal side of the tubular member are arranged; where the tubular member includes a distal side first supporting member provided on a distal side of a midpoint between the base end and the free end of the distal flap or a proximal side first supporting member provided on a proximal side of a midpoint between the base end and the free end of the proximal flap.