a probe for physiological pressure measurement in a human or animal body comprises a probe head , a line such as a catheter , and a pressure transducer , particularly an electric transducer , in the probe head . for measuring pressure , the probe head with the pressure transducer is disposed at a measuring site for pressure measurement , with the probe head being adapted for connection to an analyzer and display unit via the line . a counter or controller means is provided for recording a number of operational applications of the probe .