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Chapter 4: Operation
The following sections describe how O3 Module information is displayed when used with
Root, including display details and user-configurable settings. For additional information on
Root, see Operator’s Manual for Root.
Regional Oxygenation Information
Regional Oxygenation (rSO2)
rSO
2
, measured in percentage (0 to 99%), is the regional tissue oxygenation level in the deep
tissue local to the sensor site.
AUC Index (Area under the Curve)
AUC, measured in %
*
minutes, is displayed as an index which quantifies the duration and
depth of patient’s stay below the user-defined rSO
2
low alarm limit (LAL). Duration (minutes)
refers to the amount of time the patient stays below the rSO
2
LAL. Depth (%) refers to the gap
between the patient’s rSO
2
level and the rSO
2
LAL. AUC increases only when rSO
2
level drops
below the selected LAL.
Baseline
This feature is displayed when Set Baseline has been enabled. To enable this option see
Baseline View on page 29 of the Operator's Manual.
Baseline rSO
2
displays the user-defined baseline value for rSO
2
. Baseline is also shown as a
triangular pointer on the y-axis of the trend display for rSO
2
.
Note: When the sensor is on the patient, the baseline rSO
2
value defaults to the current rSO
2
value. When the sensor is not on the patient, the Baseline rSO
2
value defaults to a minimum
value of 10%.
Delta Baseline (Δbase)
This feature is displayed when Set Baseline has been enabled. To enable this option see
Baseline View on page 29.
Δbase, measured in percentage, is the relative decrease in rSO
2
with respect to baseline rSO
2
.
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