A stent for insertion into a vessel of a patient includes an inner tube comprising a positive Poisson's ratio (PPR) material and defining a lumen extending along a longitudinal axis of the stent; and an outer tube comprising a negative Poisson's ratio (NPR) foam material and disposed around an entirety of the inner tube, the outer tube extending along the longitudinal axis of the stent. The stent is configured to exhibit an auxetic behavior in response to a deformation of the stent. An outer surface of the second portion is configured to apply a pressure to an inner surface of the vessel when the stent is implanted into the vessel and the deformation is removed.

Embodiments of the disclosed technology provide flow diverting devices for dialysis vascular access, and methods for use therewith. According to some embodiments of the disclosed technologies, a medical device comprises: a tubular vascular stent; and a flow restrictor disposed within the tubular vascular stent. According to some embodiments of the disclosed technologies, a method comprises: providing a medical device, the medical device comprising: a tubular vascular stent, and a flow restrictor disposed within the tubular vascular stent; and deploying the medical device at a site within a vascular access of a patient. According to some embodiments of the disclosed technologies, a medical device comprises: a tubular vascular stent; one or more anchor struts formed on at least one end of the tubular stent; a flow restrictor disposed within the tubular vascular stent; and a tubular stent cover, wherein the vascular stent is disposed within the tubular stent cover.

A stent for anastomosis of different kinds of organs includes a main body, and at least one fixing unit provided in the main body. At least a portion of the main body is inserted into one of different kinds of organs to be anastomosed with each other, and the rest of the main body is inserted into the other of the different kinds of organs. A distance between the different kinds of organs under the anastomosis is maintained by the fixing units.

A stent is provided that includes a body extending between a distal and a proximal end. The body is defined by a plurality of elongated members, with each elongated member extending between a distal end that is coterminous with the distal end of the body and a proximal end that is coterminous with the proximal end of the body. Each of the plurality of elongated members are arranged so as to define a lumen extending along the length of the respective plurality of elongated members, the lumen extending between the distal and proximal ends of the body so as to form a lumen length. Each of the plurality of elongated members are configured to permit drainage of a fluid from within the lumen to an environment external the stent along the entire lumen length.

A steerable catheter, such as a dilator, includes an elongated shaft including a proximal end portion and a distal end portion, an end effector disposed at the distal end portion of the shaft, and a handle disposed at the proximal end portion of the shaft. The end effector includes a dilation portion disposed proximate the distal end portion of the shaft, a transition portion disposed distally on the dilation portion, and a distal tip portion disposed distally on the transition portion. The tip portion is movable relative to the dilation portion. The handle includes a tip portion steering actuator enabling a user to steer the tip portion. The tip portion has a tip portion diameter. The dilation portion has a dilation portion diameter which is greater than the tip portion diameter. The transition portion tapers from the tip portion diameter to the dilation portion diameter.

An implant for creating incisions in the tissues surrounding the bladder neck and the urethra of a patient, for relaxing the opening of the bladder, the implant includes a central connector and at least one wire, the wires extend radially outwardly from the center of the central connector, the wires apply continuous pressure on the surrounding tissues, the wires are foldable within an implant sheath for enabling delivery and extraction thereof, the implant is implanted within a restricted location of the urethra for a period of time for creating incisions at the locations where the wires apply pressure on the surrounding tissues.

An implant for creating incisions in the tissues surrounding the bladder neck and the urethra of a patient, for relaxing the opening of the bladder, the implant includes a central connector and at least one wire, the wires extend radially outwardly from the center of the central connector, the wires apply continuous pressure on the surrounding tissues, the wires are foldable within an implant sheath for enabling delivery and extraction thereof, the implant is implanted within a restricted location of the urethra for a period of time for creating incisions at the locations where the wires apply pressure on the surrounding tissues.

A sealable vascular endograft system for placement in a vascular defect includes a delivery catheter shaped to be disposed within a blood vessel. The delivery catheter includes an implant delivery catheter sheath defining an implant delivery catheter lumen and an endovascular implant removably disposed within the implant delivery catheter lumen in a compressed or folded state for delivery thereof to the vascular defect. The endovascular implant includes a tubular implant body and a sealable circumferential collar including a variable sealing device and a control lead traversing from the variable sealing device to a user and controlling variability of the variable sealing device by the user. The sealing device and the control lead cooperate to reversibly expand and contract the sealable circumferential collar to circumferentially adjust during deployment thereof to achieve a repositionable fluid-tight seal between the sealable circumferential collar and the internal walls proximal to the vascular defect.

A stent delivery system for delivering a stent, the stent delivery system having a push catheter, a guide member, and an elongated stent securing material having a first portion arranged to a push catheter outer surface, a second portion, a third portion, and a fourth portion arranged to the push catheter outer surface, in that order. The first portion and the fourth portion are arranged to the push catheter outer surface such that only one of the first portion and the fourth portion is present on a cross-section plane orthogonal to the longitudinal axis. The stent delivery system is configured to have a secured configuration in which the guide member is arranged within a push catheter lumen and a stent lumen and through a loop formed by a section between the second portion and the third portion to secure the stent.

The present disclosure pertains to medical devices that comprise a stent body having two ends, a central region therebetween, and comprising structural elements extending around the stent body and a covering material disposed over the stent body, the covering material covering only a portion of the stent body, in which the covering material is provided with a plurality of openings that provide areas where the stent body is not covered by the covering material. The present disclosure further pertains to medical apparatuses that comprise such medical devices and methods of treatment using such medical devices.