Passport 12/Passport 8 Operator’s Manual 9-1
9 Monitoring Respiration (Resp)
9.1 Introduction
Impedance respiration is measured across the thorax. When the patient is breathing or ventilated, the volume of air
changes in the lungs, resulting in impedance changes between the electrodes. Respiration rate (RR) is calculated from
these impedance changes, and a respiration waveform appears on the monitor screen.
9.2 Safety Information
WARNING
When monitoring the patient’s respiration, do not use ESU-proof ECG cables.
If you do not set the detection level for the respiration correctly in manual detection mode, it may not be
possible for the monitor to detect apnea. If you set the detection level too low, the monitor is more likely to
detect cardiac activity, and to falsely interpret cardiac activity as respiratory activity in the case of apnea.
The respiration measurement does not recognize the cause of apneas. It only indicates an alarm if no breath
is detected when a pre-configured time has elapsed since the last detected breath. Therefore, it cannot be
used for diagnostic purpose.
If operating under conditions according to the EMC Standard EN 60601-1-2 (Radiated Immunity 3V/m), field
strengths above 1V/m may cause erroneous measurements at various frequencies. Therefore it is
recommended to avoid the use of electrically radiating equipment in close proximity to the respiration
measurement unit.
9.3 Understanding the Resp Display
1. Gain
2. Resp lead label
3. Respiration rate
4. RR source
By selecting the waveform area or parameter area, you can enter the [Resp Setup] menu.
NOTE
Respiration monitoring is not for use on the patients who are very active, as this will cause false alarms.
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