Abstract: A catheter includes a hollow catheter shaft, and a distal tip connected to a distal end portion of the catheter shaft. A recess is formed in the distal end portion of the catheter shaft, and a proximal end portion of the distal tip is inserted into the recess. According to this catheter, joint strength of the distal tip and the catheter shaft can be enhanced.

Abstract: A balloon catheter is provided with a balloon; an outer shaft that is coupled to a proximal end of the balloon with a first coupling part; an inner shaft that is inserted into the outer shaft and that is coupled to a distal end of the balloon with a second coupling part; and a proximal end-side marker disposed on the inner shaft. The ends of the proximal end-side marker are disposed astride at least one of a distal end coupling position and a proximal end coupling position of the first coupling part.

Abstract: A balloon catheter includes a proximal shaft, a distal shaft, an intermediate shaft positioned between the proximal shaft and the distal shaft, lumens that penetrate through the proximal shaft, the intermediate shaft, and the distal shaft and introduce and discharge a dilation fluid for a balloon, an inner tube shaft having a guide wire opening arranged at a boundary between the intermediate shaft and the distal shaft and through which the lumen extends, and a reinforcement member arranged in the lumen so as to suppress an occurrence of a kink. The reinforcement member has a tapered proximal portion fixed to the proximal shaft and arranged inside the lumen positioned in the intermediate shaft, a tapered distal portion arranged inside the lumen positioned in the distal shaft, and a straight transition portion positioned between the proximal portion and the distal portion. The transition portion is aligned with the guide wire opening.

Abstract: A balloon catheter includes a proximal shaft, a distal shaft, an intermediate shaft positioned between the proximal shaft and the distal shaft, lumens that penetrate through the proximal shaft, the intermediate shaft, and the distal shaft and introduce and discharge a dilation fluid for a balloon, an inner tube shaft having a guide wire opening arranged at a boundary between the intermediate shaft and the distal shaft and through which the lumen extends, and a reinforcement member arranged in the lumen so as to suppress an occurrence of a kink. The reinforcement member has a tapered proximal portion fixed to the proximal shaft and arranged inside the lumen positioned in the intermediate shaft, a tapered distal portion arranged inside the lumen positioned in the distal shaft, and a straight transition portion positioned between the proximal portion and the distal portion. The transition portion is aligned with the guide wire opening.