A method and system are provided for analyzing and preparing optimum telephone services calling plans. The radioactive members may be used in treatment of, for example, prostate cancer. The casing is mechanically coupled to the lead so as to isolate the electrical component from torque or tensile loads applied to the lead, the lead electrode, or both. The cues are presented in a structure which may be a rotatable hour glass shaped liquid containing device which permits the liquid to flow from one portion of the hour glass to the other when the device is rotated.