Welch Allyn 20хEL Propaq Encore Vital Signs Monitor - Reference Guide - Manual (Page 39)

Propaq Encore Reference Guide 39 Welch Allyn
Patient Monitoring
ECG/RESP
Intended Use–Impedance Pneumography (RESP)
The Respiration channel is intended to detect the rate or absence of respiratory effort,
deriving the signal by measuring the AC impedance between the selected terminals of the
ECG electrodes. RESP displays a respiration rate and waveforms. Two respiration lead
selections are available, Lead 1 (RA-LA) and Lead 2 (RA-LL).
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. Always
monitor and set alarms for SpO
2
when using impedance pneumography to
monitor respiratory function.
With any monitor that detects respiratory effort via impedance pneumography,
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.
The Propaq Encore automatically rejects cardiovascular artifact (CVA). 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.
Don’t place the Propaq Encore monitor with RESP in close proximity with
another respiration monitor because the RESP measurement frequencies
may interfere with one another.
Because pacemaker pulses in some instances may be falsely counted as
breaths, impedance pneumography is not recommended for use on paced
patients.