FIG. 1 is a perspective view of a catheter showing my new design a portion of the length thereof (about 100 cm) being omitted;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is an enlarged cross-sectional view thereof, taken along the line VII--VII of FIG. 2; and,

FIG. 8 is a cross-sectional view thereof, taken along the line VIII--VIII of FIG. 2.