Catheter
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.