Abstract: A catheter includes a first region having a first outer diameter; a second region having a second outer diameter larger than the first outer diameter; and a transition region connecting with the first region and the second region, the transition region having an outer diameter being equal to or larger than the first outer diameter and equal to or smaller than the second outer diameter, wherein the outer diameter of the transition region gradually decreases from the second region toward the first region, and part of an outer circumferential surface of the transition region is formed in a shape having a step portion.

Abstract: The present invention discloses an integrally molded vehicular undercover having air permeability includes a base material layer containing inorganic fibers and a first solidified thermoplastic binder, the base material layer having a road side surface and a vehicle body side surface, an outer layer containing synthetic resin fibers and a second solidified thermoplastic binder, the outer layer being integrated with the road side surface of the base material layer, and a synthetic resin layer having air permeability, the synthetic resin layer being integrated with the vehicle body side surface of the base material layer.

Abstract: The present invention discloses an integrally molded vehicular undercover having air permeability includes a base material layer containing inorganic fibers and a first solidified thermoplastic binder, the base material layer having a road side surface and a vehicle body side surface, an outer layer containing synthetic resin fibers and a second solidified thermoplastic binder, the outer layer being integrated with the road side surface of the base material layer, and a synthetic resin layer having air permeability, the synthetic resin layer being integrated with the vehicle body side surface of the base material layer.

Abstract: A stent delivery system includes a guide catheter, a tubular stent into which the guide catheter can be inserted, and a tubular pusher catheter into which the guide catheter can be inserted and disposed nearer to a proximal end side than the stent. The pusher catheter includes a diameter expansion-suppressing part provided at a distal end part and having the same inner diameter as the stent and an intermediate part provided at a proximal end side of the diameter expansion-suppressing part and having a bending stiffness less than that of the diameter expansion-suppressing part. When the stent is pushed toward a distal end side by pushing the intermediate part of the pusher catheter toward the distal end side and bringing a distal end part of the diameter expansion-suppressing part into contact with a proximal end part of the stent, an inner diameter of the pusher catheter is prevented from expanding.

Abstract: The present invention discloses an integrally press-molded vehicular undercover. The undercover includes a needle-punched first fiber layer containing a first inorganic fiber and a first solidified thermoplastic binder and a needle-punched second fiber layer containing a second inorganic fiber and a second solidified thermoplastic binder. The first fiber layer and the second fiber layer are adhered to each other in a state that the undercover has a weak layer between the first fiber layer and the second fiber layer.

Abstract: A catheter includes: an outer tube; an inner tube provided inside of the outer tube; and a branched part that separates the outer tube and the inner tube from each other on a first end side thereof, wherein a ratio between cross-sectional areas of a first lumen formed at least by inside of the outer tube and outside of the inner tube and a second lumen formed within the inner tube is set such that a ratio between cross-sectional areas of the outer tube and the inner tube in the branched part is equal to or greater than the ratio between the cross-sectional areas of the first lumen and the second lumen in a state where the inner tube is arranged inside of the outer tube in a length direction in which the outer tube and the inner tube extend.

Abstract: A stent delivery system includes a guide catheter, a tubular stent into which the guide catheter can be inserted, and a tubular pusher catheter into which the guide catheter can be inserted and disposed nearer to a proximal end side than the stent. The pusher catheter includes a diameter expansion-suppressing part provided at a distal end part and having the same inner diameter as the stent and an intermediate part provided at a proximal end side of the diameter expansion-suppressing part and having a bending stiffness less than that of the diameter expansion-suppressing part. When the stent is pushed toward a distal end side by pushing the intermediate part of the pusher catheter toward the distal end side and bringing a distal end part of the diameter expansion-suppressing part into contact with a proximal end part of the stent, an inner diameter of the pusher catheter is prevented from expanding.

Abstract: A stent delivery system includes a guide catheter, a stent into which the guide catheter can be inserted, and a pusher catheter into which the guide catheter can be inserted and disposed in a proximal end side relative to the stent. The guide catheter has a guide catheter tip portion protruding to a distal end side further than the stent when the guide catheter is inserted into the stern and the pusher catheter, and a guide catheter body disposed at least partially in the passages of the stent and the pusher catheter. The stent has flexural rigidity equal to or lower than that of the guide catheter body, and the stent mounted region has flexural rigidity equal to or lower than that of the pusher mounted region.

Abstract: A medical treatment system including an endoscope, a treatment tool that is inserted in a channel of the endoscope, and a holder that holds the treatment tool in a manner that enables a user who operates the endoscope to move the treatment tool forward and backward and rotate the treatment tool, with the treatment tool having a treatment portion that performs treatment on a living body; a wire for operating the treatment portion whose distal end is connected to the treatment portion; a sheath portion that has a first sheath that is formed with a coil and in which the wire is inserted in a manner capable of moving forward and backward in the axial direction, and a second sheath that is formed with a coil of a plurality of layers and provided on the outside of the first sheath; and an operating portion to which the base end of the wire is connected and enables forward/backward and rotation operation of the wire; and with the holder holding the operating portion so as to be in a predetermined positional relation

Abstract: In a treatment instrument for endoscopic use including a cylindrical flexible sheath, at least a multithread coil is used to the sheath in full length.