Abstract: A self-expandable stent has sufficient radial force, has good bending properties, and recovers the shape for the diameter thereof to return from a diameter in a contracted state to a diameter before contraction around a body temperature (37° C.). The self-expandable stent includes a crosslinked polymer containing a constitutional unit (A) obtained from a monomer that constitutes a rigid biodegradable polymer when homopolymerized and a constitutional unit (B) obtained from a crosslinking agent, in which a content of the constitutional unit (B) is 15% by weight to 35% by weight with respect to a content of the constitutional unit (A).

Abstract: A stent delivery device includes a shaft with an internal lumen and a balloon connected to the shaft. The stent delivery device includes a cover configured to advance or retract in the axial direction of the shaft between a covering position where the cover covers the deflated balloon and a retracted position where the cover is spaced apart from the balloon. The stent delivery device includes a drive unit configured to apply a driving force for advancing or retracting the cover. The lumen of the shaft is configured to allow a working fluid to flow through the lumen to inflate the balloon. The balloon and drive unit are operated by the injecting and discharging of the working fluid. The inflation and deflation of the balloon and the advancing and retracting of the cover are performed in conjunction with each other.

Abstract: A self-expandable stent which has sufficient radial force, good flexural properties, and recovers the shape from a diameter in a contracted state to a diameter before contraction in a short period of time at approximately body temperature (37° C.). The self-expandable stent includes a crosslinked polymer that includes constitutional unit (A), which is a rigid biodegradable polymer derived from a first monomer; constitutional unit (B), which is a rubber-like biodegradable polymer derived from a second monomer; and constitutional unit (C) derived from a crosslinking agent. The constitutional unit (C) is present in an amount that is equal to or greater than 10% by weight and less than 60% by weight based on the total amount of constitutional units (A) and (B).

Abstract: A stent includes linear struts that form an outer periphery of a cylindrical shape in which a gap is formed between adjacent struts. Each strut has a first convex portion that protrudes inward in a radial direction R in at least a portion in a cross section along an axial direction of the cylindrical shape, and, in a state in which the stent is indwelled in a lumen in a living body, the first convex portion has a vertex that is formed to be positioned more on an upstream side of blood flow than a downstream side of blood flow and an upstream curved portion that curves and extends to protrude inward in the radial direction from the vertex toward the upstream side.

Abstract: The present invention provides a body lumen graft base that is a thin film, has adequate flexibility and low permeability, and can be inserted in a catheter with a small diameter. The body lumen graft base of the present invention is obtained by subjecting at least one surface of a woven fabric comprising a fiber having a total fineness of 1 to 80 decitex and a single fiber fineness of less than 0.1 decitex to press treatment using a calender machine.

Abstract: A stent delivery device includes a shaft with an internal lumen and a balloon connected to the shaft. The stent delivery device includes a cover configured to advance or retract in the axial direction of the shaft between a covering position where the cover covers the deflated balloon and a retracted position where the cover is spaced apart from the balloon. The stent delivery device includes a drive unit configured to apply a driving force for advancing or retracting the cover. The lumen of the shaft is configured to allow a working fluid to flow through the lumen to inflate the balloon. The balloon and drive unit are operated by the injecting and discharging of the working fluid. The inflation and deflation of the balloon and the advancing and retracting of the cover are performed in conjunction with each other.

Abstract: A stent has mechanical properties changing in a multistage manner and capable of effectively exhibiting functions thereof in response to a period after indwelling. A stent includes linear struts forming an outer circumference of a cylindrical shape with gaps formed therein and a plurality of link sections each containing a biodegradable material and connecting the struts to each other in each of the gaps, includes at least two link sections having different decomposition periods under identical conditions.

Abstract: The present invention provides a body lumen graft base that is a thin film, has adequate flexibility and low permeability, and can be inserted in a catheter with a small diameter. The body lumen graft base of the present invention is obtained by subjecting at least one surface of a woven fabric comprising a fiber having a total fineness of 1 to 80 decitex and a single fiber fineness of less than 0.1 decitex to press treatment using a calender machine.

Abstract: The stent graft delivery device includes a shaft on which the stent graft is placed on the distal side; a sheath which is slidable outside of the shaft; a handle which is provided on the proximal side of the shaft and the sheath; and an operation unit which is provided with a switch mechanism. When a rotating member is rotated, while in a state of pressing a switch member of the switch mechanism inward, the sheath moves backward and the shaft moves forward using the handle as a reference.

Abstract: The stent graft delivery device includes a shaft on which the stent graft is placed on the distal side; a sheath which is slidable outside of the shaft; a handle which is provided on the proximal side of the shaft and the sheath; and an operation unit which is provided with a switch mechanism. When a rotating member is rotated, while in a state of pressing a switch member of the switch mechanism inward, the sheath moves backward and the shaft moves forward using the handle as a reference.

Abstract: An artificial blood vessel includes a flexible tube and a structure provided at one end portion of the tube and capable of being deformed to a first outside diameter and a second outside diameter greater than the first outside diameter, wherein the tube is provided with a lock part which is locked at a desired position when the tube is folded back from its other end portion to the inside.

Abstract: A stent graft is an example of a repairing material for lumens such as aorta and other blood vessels and trachea of a living body. The stent graft includes warp yarns of plastic material and weft yarns including filaments of at least one of shape-memory plastic, shape-memory alloy, and super-elastic metal, the warp yarns and weft yarns being interwoven into a tubular shape such that the weft yarns extend in the circumferential direction and the warp yarns extend in the axial direction. Either or both of the warp yarns and weft yarns are formed from yarns capable of swelling by body fluid or from yarns with a coating capable of swelling by body fluid.

Abstract: An artificial blood vessel includes one proximal-end and at least one distal-end communicating with the proximal-end, and an inserting port positioned between the proximal-end and the distal-end. The inserting port is provided with a check valve that permits an intravascular curing device to pass through up to the proximal-end and also prevents body fluid from flowing out from the artificial blood vessel. The proximal-end is connected to the ascending aorta and the at least one distal-end is connected to one of the right brachiocephalic arterial trunk, the left common carotid artery, and the left subclavian artery.

Abstract: An artificial blood vessel includes a flexible tube and a structure provided at one end portion of the tube and capable of being deformed to a first outside diameter and a second outside diameter greater than the first outside diameter, wherein the tube is provided with a lock part which is locked at a desired position when the tube is folded back from its other end portion to the inside.

Abstract: Both types of short aramid fibers and non-aramid synthetic fibers are extruded from a side face of each rib in a V-ribbed belt. The extruded section of the short aramid fiber is formed in curled shape. The extruded section of the synthetic fiber is formed in a sector gradually broadened toward its distal end with its non-melting condition maintained. The root portions of the extruded sections of both types of short fibers are raised from the side face of the rib. The extruded sections of the short aramid fibers are extruded in multiple directions, whereas the extruded sections of the synthetic fibers are extruded in a given direction. The extruded section of the short aramid fiber is formed longer than the extruded section of the synthetic fibers.

Abstract: Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.

Abstract: Extruded sections of synthetic fibers extruded from a side face of each rib in a V-ribbed belt are plastically deformed in the shape of sectors gradually broadened toward their distal ends. The extruded sections of the synthetic fibers are not heated beyond their melting point during a grinding process so as to be kept unmelted. The extruded sections of the synthetic fibers are raised from the side face of the rib so that microscopic unevenness is formed over the side face of the rib. The synthetic fiber is formed of nylon with a filament diameter of 20 &mgr;m or more.

Abstract: Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.

Abstract: Both types of short aramid fibers and non-aramid synthetic fibers are extruded from a side face of each rib in a V-ribbed belt. The extruded section of the short aramid fiber is formed in curled shape. The extruded section of the synthetic fiber is formed in a sector gradually broadened toward its distal end with its non-melting condition maintained. The root portions of the extruded sections of both types of short fibers are raised from the side face of the rib. The extruded sections of the short aramid fibers are extruded in multiple directions, whereas the extruded sections of the synthetic fibers are extruded in a given direction. The extruded section of the short aramid fiber is formed longer than the extruded section of the synthetic fibers.

Abstract: Extruded sections of synthetic fibers extruded from a side face of each rib in a V-ribbed belt are plastically deformed in the shape of sectors gradually broadened toward their distal ends. The extruded sections of the synthetic fibers are not heated beyond their melting point during a grinding process so as to be kept unmelted. The extruded sections of the synthetic fibers are raised from the side face of the rib so that microscopic unevenness is formed over the side face of the rib. The synthetic fiber is formed of nylon with a filament diameter of 20 &mgr;m or more.