Abstract: The objective is to provide an asymmetrically bendable catheter configured such that a bent shape is different depending on whether the catheter distal part bends to one side or the other side. Disclosed is a catheter having a shaft, a first wire, a second wire, a leaf spring disposed in the lumen of the shaft so as to separate the lumen of the shaft into a first part where the first wire is disposed and a second part where the second wire is disposed, a supporting member, and a first coil having a lumen in which the first wire is disposed; the first coil fixed to a proximal end side of the leaf spring at two or more locations, and the first coil having a total length L1 in its natural state and a total length LC1 at maximum compression, and a ratio LC1/L1 is 0.9 or more.

Abstract: The objective is to provide a catheter that can realize a desired curved shape by preventing the curving axis of the catheter distal part from twisting, and preventing the catheter from kinking and decreased pushability. Disclosed is a catheter (1) having a shaft (2); at least one wire (30); a coil (60); a leaf spring (40) extending in the longitudinal direction and having a first connection part where its proximal part is fixed to a distal end part of the coil (60); and a cover tube (50) that is disposed outside the coil (60) and has a first fixed part (51) where it is fixed to the shaft (2) at a position proximal to the distal end of the coil (60) in the longitudinal direction.

Abstract: The objective is to provide a catheter that can realize a desired curve shape by preventing the curving axis of the catheter distal part from twisting, and preventing the catheter from kinking and decreased pushability. Disclosed is a catheter (1) having a shaft (2); at least one wire (30); a coil (60); a leaf spring (40) having a first connection part (41) where its proximal part is fixed to a distal end part of the coil (60); and a cover tube (50), wherein the coil (60) has a fixed part (61) where it is fixed to the shaft (2) at a position proximal to the proximal end of the cover tube (50); and the length from the distal end of the fixed part (61) to the proximal end of the cover tube (60) in the longitudinal direction is a length of 20 windings of the coil (60) or shorter.

Abstract: This catheter has: a shaft (2) that has a first end and a second end in the longitudinal direction thereof, has a lumen (3) extending in the longitudinal direction, and has formed therein a side hole (4) being in communication with the lumen (3); a protective tube (10) that is inserted in the side hole (4); a first electrode (20) that is disposed outside the shaft (2); and a wire (30) that is electrically connected to the first electrode (20), passes through the inside of the protective tube (10), and extends into the lumen (3) of the shaft (2).

Abstract: This catheter has: a shaft (10) has a first side hole (31) and a second side hole (32) in a wall (12); an insertion member (20) disposed in the lumen (11) of the shaft (10); a first electrode (41) provided on outer side of the first side hole (31); and a first wire (51) that is electrically connected to the first electrode (41) through the first side hole (31) and extents in the lumen (11) of the shaft (10) but outside the insertion member (20), wherein the first wire (51) has a first position (61) and a second position (62) inside the shaft (10), and the second position (62) of the first wire (51) is located at a position deviated from the first position (61) by 45 degrees or more in a circumferential direction of the insertion member (20).

Abstract: The purpose of the present invention is to provide an extension catheter having excellent breaking strength and a method of producing the same. The extension catheter includes a tubular portion, a tapered portion disposed proximally relative to the tubular portion, and a linear member fixed to the tubular portion and the tapered portion, the extension catheter satisfying Formula (1): 1.1T2?T1?6T2, wherein T1 represents a thickness (mm) of the tubular portion at a first position located 1 mm to a distal end of the tapered portion, the position being a position where the linear member is present, and T2 represents a thickness (mm) of the tubular portion at a second position opposite to the first position.

Abstract: A balloon catheter includes a shaft extending in one direction; a balloon disposed on the shaft; a first lubrication region; and a second lubrication region. The balloon in an expanded state includes a straight pipe portion; a first tapered portion disposed at a first end of the straight pipe portion in a long axis direction of the shaft; and a second tapered portion disposed at a second end of the straight pipe portion positioned opposite to the first end of the straight pipe portion in the long axis direction. Each of the first tapered portion and the second tapered portion tapers away from the straight pipe portion, and the first lubrication region extends over the straight pipe portion and the first tapered portion.

Abstract: A balloon catheter includes a shaft extending in one direction; a balloon disposed on the shaft; a first lubrication region; and a second lubrication region. The balloon in an expanded state includes a straight pipe portion; a first tapered portion disposed at a first end of the straight pipe portion in a long axis direction of the shaft; and a second tapered portion disposed at a second end of the straight pipe portion positioned opposite to the first end of the straight pipe portion in the long axis direction. Each of the first tapered portion and the second tapered portion tapers away from the straight pipe portion, and the first lubrication region extends over the straight pipe portion and the first tapered portion.