The Task Group surveyed several hospital users and found that by using the present technology (transmitting at 0.8 bits per second per Hertz) up to 500 concurrently operated telemetry transmitters within a geographical area would require a minimum of just over 6 MHz of spectrum frequencies. The survey results indicated that the greatest uses for wireless monitoring are for adult electrocardiogram, 12-lead parametric monitoring, pulse oximetry, invasive blood pressures, and respiration (AHA, 1999 and FCC, 2000). Future needs were estimated to make use of at least double this number of concurrent transmitters within the same area and consequently require at least 12 MHz of spectrum.