. . . . " compound. [0035]FIGS. 2A and 2B are perspective views of the introducer sheath and occlusion member of FIG. 1, showing a balloon on the occlusion member in collapsed and expanded states, respectively. [0036]FIGS. 3A and 3B are cross-sectional details of a distal portion of the occlusion member shown in FIGS. 2A and 2B, respectively. [0037]FIG. 4 is a side view of a hub subassembly shown on a prox" .