An electronic circuit, preferable as a sensor node, has a highly sensitive radio function and is capable of performing a low-power-consumption operation. Catheter forceps for obtaining a tissue sample are also provided, including a catheter, a sampling chamber positioned at a distal end of the catheter and having a movable cover, and an actuation mechanism for moving the movable cover to an opened position by providing a fluid to the actuation mechanism and to a closed position by providing a vacuum to the actuation mechanism. This arrangement ensures adequate and accurate detection of an engine misfire during warm-up of a catalyst included in an exhaust emission control unit with a significant delay of the ignition timing in the engine. A maximum amount of time between any of the calls in the sequence of calls does not exceed an expiration period.