A probe (20) for insertion into the body of a subject, the probe (20) having distal (22) and proximal ends, and including an electronic microcircuit (90), which stores information relating to calibration of the probe (20). Preferably, the microcircuit (90) stores a calibration code, which is encrypted....http://www.google.se/patents/US6266551?utm_source=gb-gplus-sharePatent US6266551 - Catheter calibration and usage monitoring system
