A flexible, elongate probe having a distal end for insertion through physiological tissue, preferably through a lumen in the tissue. The probe includes a sensor, which generates signals indicative of a characteristic of the tissue in a vicinity of the probe, and an alignment mechanism, which deflects...http://www.google.de/patents/US6083170?utm_source=gb-gplus-sharePatent US6083170 - Self-aligning catheter
