Welch Allyn Vital Signs Monitor, Propaq Encore - Quick Reference Guide - Manual (Page 45)

Reference Guide Patient monitoring 39
or if the transducer’s offset is too great. Once the channel is zeroed, the pressure
scale appears next to the waveform.
If the transducer still does not zero, try another transducer or another cable.
Setting up the pressure channel
Press INV PRS to set the invasive pressure channel selections: RANGE, RESCALE, and
ZERO P1/ZERO P2. Press MORE to set LABEL P1/LABEL P2 and FORMAT 1/FORMAT 2.
Setting the invasive pressure alarms
Set the alarm limits according to your hospital's standards.
Rezeroing a transducer
You can rezero a transducer at any time, after again opening the transducer stopcock to
atmospheric air. If the transducer has already produced pressure readings, rezeroing
provides a new zero reference for the Propaq.
If the zero value is not accepted, the Propaq Encore continues to use the previous zero
reference and displays the pressure values and waveforms based on that value. If the
new zero value is accepted, the new pressure values based on the new zero value are
displayed, and the waveform is adjusted according to the new scale.
To remove the ZERO REJECTED message and to restore the invasive pressure numerics
during an invasive pressure alarm, you must return to the invasive pressure menu and
press CANCEL. This will restore the invasive pressure numerics.
How invasive pressure is displayed
From the invasive pressure signal, the Propaq Encore displays both a pressure waveform
and pressure numeric values (systolic, diastolic, and mean). The waveform is displayed in
a waveform window (if the waveform is turned on in the wave select window). The
numerics are displayed in the blood pressure numerics windows.
The Propaq Encore allows you to identify the pressure measurement with a selectable
label, and the numerics can be displayed in different formats.
The pressure waveform scales are not displayed until you zero the transducer. Once the
zero reference has been established the scales automatically appear.
WARNING If a ZERO button is pressed after an invasive pressure channel has
been successfully zeroed and is currently monitoring a pressure waveform, the
message ZERO REJECTED will display in the invasive pressure numerics
window. This message will preempt the valid invasive pressure numerics until the
CANCEL button in the Invasive Pressure Menu is pressed.
WARNING If the invasive pressure channel enters an alarm condition while the
ZERO REJECTED message is overriding the invasive pressure numerics, no
invasive pressure numerics will flash to indicate invasive pressure is in alarm.