Welch Allyn 246 Propaq CS Vital Signs Monitor v.3.7X - User Manual - Manual (Page 25)

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Monitoring
Perform ECG/RESP monitoring
WARNING Impedance pneumography detects respiratory effort via changes in
chest volume; therefore, impedance pneumography can be used to detect central
apnea. However, apnea episodes with continued respiratory effort, such as
obstructive apnea and mixed apnea, may go undetected. Also, artifact due to
patient motion, apnea mattress shaking, or electrocautery use may cause apnea
episodes to go undetected. Always monitor and set alarms for SpO
2
when using
impedance pneumography to monitor respiratory function.
WARNING The Propaq CS monitor automatically rejects cardiovascular artifact.
This function is dependent upon accurate ECG R-wave detection. Therefore,
always select the ECG lead with the most prominent QRS complex when
monitoring respiration via impedance pneumography.
WARNING Don’t place the Propaq CS monitor with RESP in close proximity to
another respiration monitor because the RESP measurement frequencies may
interfere with one another.
WARNING Because pacemaker pulses in some instances may be falsely
counted as breaths, impedance pneumography is not recommended for use on
paced patients.
WARNING Motion artifact can cause incorrect breath rate or heart rate readings.
Minimize patient motion whenever possible.
WARNING If a disconnected lead is in too close proximity to other electrical
devices, it may cause false heart rate, a failure to detect apnea, or a failure to
display a Lead Fail message.
WARNING The Propaq CS monitor does not provide arrhythmia analysis.
Therefore, arrhythmias are not analyzed and may cause the monitor to display
inaccurate heart rates.
WARNING The Propaq CS monitor shows + + + for HR numerics between 301
and 350 beats per minute. Above 350 beats per minute, it may display incorrectly
low heart rates, due to intermittent picking of R-waves.