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ECG/RESP
Welch Allyn 40 Propaq Encore Reference Guide
Intended Use–ECG
The Propaq Encore is intended for ECG monitoring of either a five-lead or three-lead
configuration, including the Marriott configuration 1 (MCL1 requires all three electrodes).
The five lead configuration can derive one of seven user-selected signals, Lead I, II, III, aVR,
aVL, aVF, or V.
The monitor will automatically determine if only three lead wires are connected, and will
automatically reduce the number of selectable leads to three (I, II, III). If four-wire ECG
cables are used, they will be handled as if they were three-wire cables.
The Propaq Encore 200 series does not have automated ST segment monitoring, although
with ECG set for extended bandwidth, ST segments may be accurately displayed and
printed.
The Propaq Encore ECG’s bandwidth is 0.5-40 Hz in Monitor Mode and 0.05-40 Hz in
Extended Mode. Monitor Mode is useful to minimize baseline wander due to respiration or
other artifact. However, in Monitor Mode, ST segments can be distorted, potentially causing
underestimation of ST elevation and overestimation of ST depression. Always use Extended
Mode when observing ST segment morphology on the display or printer.
The Propaq Encore can be used during procedures using electrosurgical machines and
defibrillators. However, even though the ECG channel contains electrosurgical interference
suppression (ESIS) circuitry, noise artifact may be displayed on the ECG trace while an
electrosurgical device is in use. This will vary depending on ECG electrode placement and
the operative site.
Impedance pneumography is not recommended for use with high frequency
ventilation.
Since RESP is derived from the same leads as the ECG channel, the Propaq
Encore determines which signals are cardiovascular artifact and which signals
are a result of respiratory effort. If the breath rate is within five percent of the
heart rate or a multiple or sub-multiple of the heart rate, the monitor may
ignore breaths and trigger an apnea alarm.
Warning The Propaq Encore monitor does not have automated arrhythmia
analysis, therefore, some ventricular tachycardias and ventricular fibrillation
may not be interpreted correctly and may display an inaccurate heart rate.