Patent ID: 7390323

Claim:
A catheter comprising: a main body insertable in a tubular organ of a living being, the main body including first main portion and a second main portion, each of which having a substantially consistent outside diameter, the first main portion having a first lumen and a second lumen, the two lumens being located symmetrically on either side of a center axis line of the catheter, the first lumen provided for a first guide wire movably insertable in the first lumen, the second lumen provided for a second guide wire movably insertable in the second lumen, the second guide wire passing into the second lumen at a transition between the first main portion and the second main portion, a first inclined surface formed in a front end portion of the main body on one side of the center axis line of the main body, inclined toward the center axis line of the main body in an insert direction of the main body into the tubular organ, the first inclined surface having a first opening, the first opening connected to the first lumen to permit the first guide wire to extend from the main body, a second inclined surface formed in the front end portion of the main body on the other side of the axis line of the main body, inclined toward the axis line of the main body in the insert direction of the main body into the tubular organ, the second inclined surface having a second opening, and the second opening connected to the second lumen to permit the second guide wire to extend from the main body; and a first marker portion provided in the main body and having radiopaque characteristics configured to indicate a side where the first inclined surface is formed and to show a first predetermined length in a direction of the center axis line, and a second marker portion provided in the main body and having radiopaque characteristics to indicate a side where the second inclined surface is formed to show a second predetermined length in the direction of the axis line that is different from the first predetermined length, wherein an angle of inclination of the second inclined surface is smaller than an angle of inclination of the first inclined surface so that the second guide wire can extend from the second opening with a greater angle or a smaller radius of curvature than the first guide wire extending from the first opening.