Abstract: A catheter that includes a catheter marker having a radiopaque property that can identify a distal end orientation of the catheter for a short time inside the body, and a diagnostic method. A catheter marker having a radiopaque property is disposed asymmetrically with respect to the center of a shaft centerline of the catheter, and angiograms having different shapes under the radiopaque are obtained, so that it is possible to rather easily determine a position and a distal end orientation of the catheter.

Abstract: Provided is a catheter that is excellent in visibility of a braid distal end portion inside and outside the body, is excellent in stenosed site crossability and trackability to a tortuous blood vessel, and prevents the braid from spreading out due to the stenosed site penetration. The catheter includes a shaft, the shaft includes an inner layer, an outer layer, and a braid that is disposed between the inner layer and the outer layer and includes a plurality of metal wires being woven together, the braid includes a welding portion at a further proximal side than a distal end of the shaft and in the vicinity of a distal end of the braid, and the shaft includes an radiopaque marker at a position separated from the welding portion, thereby preventing the braid from spreading out due to buckling of the shaft, and improving the blood vessel trackability.

Abstract: A catheter is disclosed having a distal end portion of a shaft with high breaking strength even if a wall thickness of the distal end portion of the shaft is relatively small. The catheter includes an elongated tube shaped shaft. The shaft has an inner layer having a lumen along a longitudinal direction, an outer layer covering an outer peripheral side of the inner layer, and a reinforcement body disposed on the outer peripheral side of the inner layer. The outer layer has a distal outer layer on a distal end portion of the shaft, an intermediate outer layer proximal to the distal outer layer, and a proximal outer layer proximal to the intermediate outer layer. The intermediate outer layer is more flexible and thicker than the proximal outer layer, and a distal end of the reinforcement body is located proximal to a distal end of the intermediate outer layer.

Abstract: A method includes indwelling a filter inside a body lumen in a living body so that the filter is indwelled at a position downstream from a stenosed site in the body lumen, moving a collection device in a downstream direction within the living body from upstream of the stenosed site to the stenosed site while the filter remains indwelled at the position downstream from the stenosed site, engaging the filter with the collection device while the filter is indwelled at the position downstream from the stenosed site so that the filter is connected to the collection device, and removing the collection device and the filter from the living body by moving both the filter and the collection device in an upstream direction while the filter and the collection device are engaged with one another.

Abstract: A medical system for trapping an object inside a body lumen of a living body and removing the object from the living body. The medical system includes a trapping portion, which includes a first engagement portion at the distal end of the trapping portion. A conveying device accommodates the trapping portion. The trapping portion is dischargeable from the conveying device. The trapping portion expands radially outward after being discharged. The medical system includes a collection device that collects the trapping portion. The collection device includes an elongated collection shaft with a second engagement portion configured to engage the first engagement portion. The second engagement portion is configured to pull the first engagement portion at the distal end of the trapping device towards the proximal end of the elongated shaft when the first and second engagement portions engage one another.

Abstract: A method of manufacturing a medical elongated body including an inner layer, an outer layer covering the outside of the inner layer, and a reinforcement body provided between the inner layer and the outer layer. The method includes an inner layer forming step of forming the inner layer, a reinforcement body forming step of forming the reinforcement body on an outer peripheral surface of the inner layer after the inner layer forming step, a cooling step of cooling at least a predetermined spot of the inner layer after the reinforcement body forming step, and an annealing step of annealing the reinforcement body which overlaps the predetermined spot of the inner layer cooled by the cooling step.

Abstract: A catheter is disclosed having a distal end portion of a shaft with high breaking strength even if a wall thickness of the distal end portion of the shaft is relatively small. The catheter includes an elongated tube shaped shaft. The shaft has an inner layer having a lumen along a longitudinal direction, an outer layer covering an outer peripheral side of the inner layer, and a reinforcement body disposed on the outer peripheral side of the inner layer. The outer layer has a distal outer layer on a distal end portion of the shaft, an intermediate outer layer proximal to the distal outer layer, and a proximal outer layer proximal to the intermediate outer layer. The intermediate outer layer is more flexible and thicker than the proximal outer layer, and a distal end of the reinforcement body is located proximal to a distal end of the intermediate outer layer.

Abstract: A catheter assembly includes an outer catheter and an inner catheter. The inner catheter has an accommodation unit which can be positioned on a farther distal side than an outer catheter body in a state where an inner catheter body is inserted into the outer catheter body, extends in a proximal direction from the inner catheter body, and can accommodate an outer catheter distal portion so as to surround an outer circumference thereof in a state where the outer catheter distal portion formed at a distal end of the outer catheter body is reduced in diameter. The outer catheter distal portion can be separated from the accommodation unit and can expand in diameter by moving the inner catheter body in a distal end direction relatively with respect to the outer catheter body from a state of being accommodated in the accommodation unit.

Abstract: A medical system for trapping an object inside a body lumen of a living body and removing the object from the living body. The medical system includes a trapping portion, which includes a first engagement portion at the distal end of the trapping portion. A conveying device accommodates the trapping portion. The trapping portion is dischargeable from the conveying device. The trapping portion expands radially outward after being discharged. The medical system includes a collection device that collects the trapping portion. The collection device includes an elongated collection shaft with a second engagement portion configured to engage the first engagement portion. The second engagement portion is configured to pull the first engagement portion at the distal end of the trapping device towards the proximal end of the elongated shaft when the first and second engagement portions engage one another.

Abstract: A method of manufacturing a medical elongated body including an inner layer, an outer layer covering the outside of the inner layer, and a reinforcement body provided between the inner layer and the outer layer. The method includes an inner layer forming step of forming the inner layer, a reinforcement body forming step of forming the reinforcement body on an outer peripheral surface of the inner layer after the inner layer forming step, a cooling step of cooling at least a predetermined spot of the inner layer after the reinforcement body forming step, and an annealing step of annealing the reinforcement body which overlaps the predetermined spot of the inner layer cooled by the cooling step.

Abstract: A catheter assembly includes an outer catheter and an inner catheter. The inner catheter has an accommodation unit which can be positioned on a farther distal side than an outer catheter body in a state where an inner catheter body is inserted into the outer catheter body, extends in a proximal direction from the inner catheter body, and can accommodate an outer catheter distal portion so as to surround an outer circumference thereof in a state where the outer catheter distal portion formed at a distal end of the outer catheter body is reduced in diameter. The outer catheter distal portion can be separated from the accommodation unit and can expand in diameter by moving the inner catheter body in a distal end direction relatively with respect to the outer catheter body from a state of being accommodated in the accommodation unit.