Nose 250 may comprise any of a variety of soft, flexible materials, such as silicone, neoprene, latex, and urethane. [0127] A further embodiment of a delivery catheter 138 is illustrated in FIG. 22A. Details of the distal end 140 including the docking structure 142 are illustrated in FIGS. 22B-22E, which show sequential steps in the deployment of a probe 18. [0128] Delivery catheter 138 illustrate