Routine Operation Operation
2 - 8 0070-10-0603-01 Duo™ Operating Instructions
The cuff begins to inflate. After reaching the default pressure for the selected patient size, the
cuff slowly deflates and the Duo collects oscillometric pulsations. During this inflation and
deflation portion of the measurement, the MAP section of the NIBP parameter tile displays
the current pressure in the cuff. During this same period, the Sys. and Dia. sections of the
NIBP parameter tile display dashes “- - -”.
The patient should remain still to avoid the introduction of unnecessary motion artifact. After
the cuff pressure drops below the diastolic pressure, the measurements are displayed in the
NIBP parameter tile. These results will be deleted and the NIBP parameter tile will be blank if
one of the following occurs:
• 15 minutes elapse since the last NIBP measurement
•The Clear/Next Patient key is pressed to clear the results
•The Duo is powered OFF
If the Duo enters Standby Mode, the internal counter for the elapsed time since the last NIBP
measurement continues. If Normal Monitoring Mode resumes before the counter reaches 15
minutes, the NIBP results will display until one of the previous bulleted items occurs or the
Duo again enters Standby Mode.
NOTE: Pressing the NIBP Start/Stop key while the NIBP
measurement is in progress will stop the measurement and
deflate the cuff.
2.3.2 Pulse Rate Measurement
The Pulse Rate is determined from one of two sources: SpO
2
and NIBP.
NOTE: If the optional SpO
2
is not purchased with the Duo, the Pulse
Rate source will be NIBP by default.
SpO
2
is the higher priority source. If both SpO
2
and NIBP are being actively monitored,
SpO
2
will be the source for the Pulse Rate measurement. If only NIBP is being actively
monitored, it will be the source for the Pulse Rate measurement.
• When determined from SpO
2
, the Pulse Rate updates approximately once every second.
When SpO
2
is no longer being monitored, the Pulse Rate parameter tile will be blank.
• When determined from NIBP, the Pulse Rate will display until the NIBP results are no
longer displayed, as described in section 2.3.1.
NOTE: Pulse Rate from NIBP is a static value since NIBP is a static,
one-time measurement.
The Pulse Rate results will display for the same maximum time that the source parameter
(SpO
2
or NIBP) is displayed.
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