Catheter having pressure detecting ability

摘要

A catheter provided with a catheter tube that is inserted into a human body. A sensor detects pressure acting on a distal end of the catheter tube when inserted into the human body and outputs an output signal indicating fluctuations of the pressure. A CPU judges whether the waveform of the output signal contains a regular component and an irregular component and separates the output signal into a regular component and an irregular component based on the judgment. Based on the separated irregular component, a judgment is made as to whether an obstruction is present within an insertion path of the catheter./!