Abstract: A medical device to be inserted into a body lumen to obstruct flow in the body lumen includes a shaft unit; a proximal slider and a distal slider that are slidable along the shaft unit; a first expanding member including a distal portion coupled to the proximal slider and a proximal portion coupled to the shaft unit; a second expanding member including a distal portion coupled to the distal slider and a proximal portion coupled to the proximal slider; and a cover that surrounds an outer periphery of the first expanding member and coupled to the proximal portion of the first expanding member, the cover being tubular and flexibly deformable independently of the first expanding member.

Abstract: A medical device is disclosed for restricting a flow in a body lumen by being inserted into the body lumen. The medical device including an elongated shaft part; an expansion part which is a tubular body having a plurality of gaps and elastically deformable, with the shaft part being connected to at least one of both side end portions of the tubular body; a cover part which is flexibly deformable independently from the expansion part while surrounding an outer circumference of the expansion part, which is tubular in shape, both end portions of the tubular shape being connected to both end portions of the expansion part; and a sheath in which the expansion part and the cover part both contracted in diameter can be accommodated.

Abstract: A stent for placement in living body is substantially in a tubular form and includes a plurality of wave-shaped struts extending in the axial direction from one end to the other of the stent. The axially-extending wave-shaped struts are arranged in a circumferential direction, and connection struts interconnect the respective circumferentially adjacent wave-shaped struts. The circumferentially adjacent wave-shaped struts include a plurality of closer sections and farther sections. The connection struts interconnect between the closer sections of adjacent wave-shaped struts, and each has at the center thereof a bent portion extending in the axial direction of the stent.

Abstract: A self-expandable stent system is disclosed, which includes an inner structure and an outer tube, and a self-expandable stent, which is arranged between the inner structure and the outer tube. A distal end dilating portion is disposed in a distal end of the inner structure, and the distal end dilating portion closes an opening disposed in a distal end of the outer tube.

Abstract: Disclosed is a treatment device for occluding a body lumen, including: an elongated body which can be inserted into the body lumen; a flat portion forming section which is supported by the elongated body, is expandable widthwise on a more distal side than the elongated body, and deforms the body lumen into a form having a flat portion at a distal portion of the flat portion forming section upon the expansion of the flat portion forming section within the body lumen; and an administering section which administers, toward the flat portion formed by the flat portion forming section, a treatment which acts to occlude the flat portion.

Abstract: A stent delivery device is disclosed, which includes a stent arranged in a self-expandable state between a shaft and an inner sheath. In a state where an outer sheath is moved rearward and an expansion limiting portion is exposed outward, the expansion limiting portion formed in a distal portion of the inner sheath limits expansion of the stent so that an outer diameter of a distal end of the stent becomes a first diameter (D1) which is larger than an inner diameter (Da) of the outer sheath, and in a state where the inner sheath is moved rearward and the stent is exposed outward, the stent expands so that the outer diameter of the distal end of the stent becomes a second diameter (D2) which is larger than the first diameter (D1).

Abstract: A method of treating a varicose vein includes positioning an assembly at a treatment site in the vein, wherein the assembly includes an outer sheath, a self-expanding member inside the outer sheath, and an energy emitting member.

Abstract: A method of treating a varicose vein involves inserting an assembly into the vein, the assembly being comprised of an elongated body possessing a distal end at which is located an energy emitting member having a shape; contacting the inner wall of the vein with the distal end of the energy emitting member having the shape such that the distal end of the energy emitting member contacts the inner wall along a line; rotating the energy emitting member while the energy emitting member contacts the inner wall along the line; and occluding the vein by applying energy from the energy emitting member to the inner wall of the vein

Abstract: A method of treating varicose veins includes inserting an assembly into a vein, wherein the assembly includes an outer sheath, a self-expanding member inside the outer sheath, and a cutting member mounted on the self-expanding member. The method involves relatively moving the outer sheath and the self-expanding member while the assembly is in the vein to expose the distal end of the self-expanding member distally beyond the distal end of the outer sheath so that the self-expanding member outwardly toward the inner wall of the vein, with the cutting member being moved into direct contact with the inner wall of the vein. The method further includes rotating the self-expanding member together with the cutting member while the cutting member is in direct contact with the inner wall of the vein so that the cutting member damages the inner wall of the vein and forms blood clots.

Abstract: A stent delivery system includes a self-expanding stent, an inner tube body which has a guide wire lumen, and a sheath which has the stent contained within the tip section thereof. The stent can be discharged by moving the sheath to the base end side relative to the inner tube body. The inner tube body is provided at a position within the base end section of the stent and is provided with an elastic member for pressing the stent in the direction to the sheath. The stent is gripped by the elastic member and the sheath and is adapted to be slidable relative to the sheath.

Abstract: A stent includes a plurality of first wave-shaped struts extending in the axial direction of the stent and arranged in the circumferential direction of the stent, a plurality of second wave-shaped struts each located between the first wave-shaped struts, and one or more connecting struts each interconnecting the first wave-shaped strut and the second wave-shaped strut which are adjacent to each other, with the one or more connecting struts extending in the axial direction over a predetermined length. The apexes of the second wave-shaped struts are shifted a predetermined distance in the axial direction of the stent relative to the apexes of the first wave-shaped struts which are located close to the apexes in the circumferential direction of the stent and which are curved in the same direction as the apexes.

Abstract: A stent delivery system includes a self-expanding stent, an inner tube body, and a sheath whose distal portion contains the stent. The stent can be discharged by moving the sheath proximally relative to the inner tube body. The inner tube body includes a distal contact section provided relative to a proximal portion of the stent and does not enter side wall openings of the stent; and a proximal contact section located at a position rear of the proximal end of the stent and close to the distal contact section. The stent has a proximal inwardly protruding section which can make contact with the distal contact section of the inner tube body. The proximal inwardly protruding section is located between the distal contact section and the proximal contact section. The stent does not, except in the proximal portion thereof, have a substantially bent, free end which protrudes towards the proximal side.

Abstract: The invention provides a method for evaluating a corneal disorder quantitatively and is applicable to living eyes. In particular, the invention provides a method for measuring a corneal transepithelial electric resistance, which method comprises: (1) a step of placing a first electrode on the cornea and a second electrode on the conjunctiva; and (2) a step of flowing an electric current between the first electrode and the second electrode to measure the electric resistance. The invention also provides a device for measuring a corneal transepithelial electric resistance value.

Abstract: A stent delivery system includes a stent formed in a substantially hollow cylindrical shape and compressed toward its center axis when inserted in vivo, with the stent being capable of restoring its pre-compression shape through outward expansion when left indwelling in vivo. The stent delivery system also includes an inner tube possessing a guide wire lumen, and a stent accommodating tube having a distal portion accommodating the stent. The stent is disposed as to cover a distal portion of the inner tube, and the stent is adapted to be exposed by moving the stent accommodating tube toward the proximal side relative to the inner tube.

Abstract: A stent delivery system includes a body and an operation unit disposed at the proximal end of the body. The body includes a self-expanding stent, an inner tube body, and a stent-accommodating tube body in which the stent is accommodated. The inner tube body has a stent-holding part enabling the stent to be re-accommodated into the stent-accommodating tube body. The operation unit includes a rack member fixed to a proximal end of the stent-accommodating tube body, an operation rotary roller having a working gear wheel that engages the teeth of the rack member, thereby causing the rack member to move forward and backward; and a connector fixed to a proximal end portion of a proximal-side tube that penetrates the stent-accommodating tube body and protrudes from the proximal end of the stent-accommodating tube body.

Abstract: A stent delivery system includes a self-expanding stent, an inner tube body which has a guide wire lumen, and a sheath which has the stent contained within the tip section thereof. The stent can be discharged by moving the sheath to the base end side relative to the inner tube body. The inner tube body is provided at a position within the base end section of the stent and is provided with an elastic member for pressing the stent in the direction to the sheath. The stent is gripped by the elastic member and the sheath and is adapted to be slidable relative to the sheath.

Abstract: A stent for placement in living body is substantially in a tubular form and includes a plurality of wave-shaped struts extending in the axial direction from one end to the other of the stent. The axially-extending wave-shaped struts are arranged in a circumferential direction, and connection struts interconnect the respective circumferentially adjacent wave-shaped struts. The circumferentially adjacent wave-shaped struts include a plurality of closer sections and farther sections. The connection struts interconnect between the closer sections of adjacent wave-shaped struts, and each has at the center thereof a bent portion extending in the axial direction of the stent.

Abstract: A stent includes a plurality of first wave-shaped struts extending in the axial direction of the stent and arranged in the circumferential direction of the stent, a plurality of second wave-shaped struts each located between the first wave-shaped struts, and one or more connecting struts each interconnecting the first wave-shaped strut and the second wave-shaped strut which are adjacent to each other, with the one or more connecting struts extending in the axial direction over a predetermined length. The apexes of the second wave-shaped struts are shifted a predetermined distance in the axial direction of the stent relative to the apexes of the first wave-shaped struts which are located close to the apexes in the circumferential direction of the stent and which are curved in the same direction as the apexes.

Abstract: The invention provides a method for evaluating a corneal disorder quantitatively and is applicable to living eyes. In particular, the invention provides a method for measuring a corneal transepithelial electric resistance, which method comprises: (1) a step of placing a first electrode on the cornea and a second electrode on the conjunctiva; and (2) a step of flowing an electric current between the first electrode and the second electrode to measure the electric resistance. The invention also provides a device for measuring a corneal transepithelial electric resistance value.

Abstract: A stent delivery system includes a stent formed in a substantially hollow cylindrical shape and compressed toward its center axis when inserted in vivo, with the stent being capable of restoring its pre-compression shape through outward expansion when left indwelling in vivo. The stent delivery system also includes an inner tube possessing a guide wire lumen, and a stent accommodating tube having a distal portion accommodating the stent. The stent is disposed as to cover a distal portion of the inner tube, and the stent is adapted to be exposed by moving the stent accommodating tube toward the proximal side relative to the inner tube.