User's Manual Part 1

vii
Notices to Practitioners and Subjects
Electromagnetic Interference (EMI) Advisories
Introduction
The VitalSense Integrated Physiological Monitoring System uses wireless
telemetry to send data over a distance. By nature, wireless devices use an
“open” channel which is shared by other wireless devices which may be
interfered with, or may interfere with the VitalSense system.
Consequently, the customer is advised to carefully consider the
environment in which the VitalSense system will be used. The VitalSense
system was designed for use in general health care and household
environments. It may also be used in research facilities and field research.
The VitalSense system can be used in some military environments, but is
not intended for use in military aircraft or shipboard.
VitalSense sensors should not be ingested or affixed during Mag-
netic Resonance Imaging (MRI). Sensors contain ferro-magnetic
materials.
VitalSense Frequency
The channel frequency for the VitalSense system is 40.68 MHz and the
frequency band is 40.66 – 40.70 MHz. Although this is a seldom-used
band, Mini Mitter recommends that you check the channel frequency of
other wireless devices intended for use in the vicinity of the VitalSense
system. Other wireless devices operating in the frequency band of 40.66 –
40.70 MHz may interfere with, or may be interfered by the VitalSense
system. Generally, the output power of the sensors is extremely low and is
unlikely to interfere with any equipment in the area. It is more likely that
another device operating in the same band will interfere with the
VitalSense system.
EMI Effects on VitalSense System
If the VitalSense system experiences interference, the monitor will no
longer receive intelligible transmissions from the sensors. In Standard
Mode, whenever transmissions from the sensor are missed, an asterisk is
displayed next to the temperature. This asterisk remains until a
transmission is received. The data is updated on average every 15 seconds.
If the display flashes, but the asterisk remains, the sensors are still
experiencing interference. In Medic Mode
™
, data from a particular sensor
experiencing interference will not be displayed at all. Once the interfering
signal is eliminated, the asterisk displayed in Standard Mode will
disappear, and new data will be displayed in either mode.