During first period, TFTs: and are set in ON and OFF states, respectively. The IMD also includes logic device which analyzes the sensor circuit output signal to detect a medical abnormality and either sends a notification signal as well as signal representing a medical state of said patient to the medical expert at the remote location or sends a local treatment device control signal to the medical treatment device, or does both. The receiver includes a reception-side code generator and a first inverse spread unit for example.