If so desired, though, a structure such as is shown in FIGS. 1A and 1B, wherein the guidewire extends distally beyond the basket, could instead be used. [0022] As best seen in its collapsed state (shown in FIG. 3), the basket includes a distal segment 325 and a proximal segment 326, with the distal end of the distal segment being attached to the distal band 324 and the proximal end of the proximal