Catheter for aortic valvuloplasty

A catheter for aortic valvuloplasty characterized by including:

• first to third balloons that can expand and contract due to supply of a fluid and can change the relative positional relationships;
• first to third shafts that connect to the first to third balloons at the tip and supply fluid to the first to third balloons to cause the first to third balloons to expand and contract independently of each other;
• and
• first to third wires configured to introduce the first to third balloons from outside the body of the patient to the aortic valve,
• wherein:
• a separated portion in which the first wire, the second wire, and the third wire are separated from each other, and a coupled portion in which the first wire, the second wire, and the third wire are coupled to each other, are formed;
• a coil layer formed by winding a coil is provided on the outer periphery of the coupled portion;
• the first wire, the second wire, and the third wire each have a substantially tapered shape toward the distal side so that the following relationship (1):
• D
• ⁢
• 1
• +
• D
• ⁢
• 2
• +
• D
• ⁢
• 3
• ≈
• D
• (
• 1
• )
• is satisfied wherein diameters of the first wire, the second wire, and the third wire in the separated portion are defined as D1, D2, and D3, respectively, and a diameter of the coupled portion including the coil layer is defined as D.