This is a medical device for forming an embolism within the vasculature of a patient. The plurality of circuit components include at least one active component that operates on an information signal, a tuning node coupled to the at least one active component, an Electro Static Discharge protection inductor, and a chip pad. A foot air duct is connected to the wall surface around the foot opening portion, and extends downwardly to be tilted toward right and left sides. Consequently, the seamless multiplexer not only reduces any multiplexing overhead, but also allows much smaller granularity of access in reshaping the compressed input signal. Data points are compressed by modifying or eliminating data depending upon the slope relationship of a stored data point to artificial data points, which are representative of the range of accepted deviations from the original data point.