A medical device which can rotate a radiation emitter or the like with high positional precision over an extended period of time is provided. The method and apparatus of the invention take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements. A liquid is adsorbed into the adsorberdesorber when being cooled and desorbed when the adsorberdesorber is heated. Thereafter, the first assembly is separated from the connector and graft conduit. The signal-processing method includes the steps of externally transmitting operation information that can specify an operation state of the semiconductor device from the semiconductor device and performing the predetermined signal processing based on the unit signal by referring to the operation information in a signal-processing unit provided outside the semiconductor device. A variable impedance circuit includes an output electrically coupled to the inductive element.