Sentec tcPCO2 - Quality Indicators and Measurement Values; Quality Indicators for Measurement Parameters; Ax-Values and Baseline Values

∆x-Values and Baseline Values
Certain preconfigured measurement screens provide online
trends with ∆x-values, baseline values and baselines for PCO
2
,
PO
2
, SpO
2
and/or RHP.
A parameter’s ∆x-value is displayed to the right of its online
trend and corresponds to the difference between its current
reading and its reading x minutes ago. x is called ‘Delta-
Time’ and is adjustable between 1 and 120 minutes within a
password-protected area of V-STATS™. The default value for
‘Delta-Time’ is 10 minutes.
Example: A ‘∆10-value for PCO
2’
of ‘+ 8.8 mmHg’ indicates
that the current PCO
2
reading is 8.8 mmHg higher than the
PCO
2
reading ten minutes ago.
Quality Indicators for Measurement Parameters
The SDM continuously evaluates the quality of the measured
parameters and the ∆x-values and baseline values derived
thereof by assessing the severity of conditions presented to
the SDM. The results of this evaluation are used to display
status messages and/or quality indicators for the different
parameters. While a parameter is marked as:
Valid: Alarm surveillance for the respective parameter (if
applicable) is active and the SDM displays the parameter in
the selected color.
Questionable (‘?’): Alarm surveillance for the respective
parameter (if applicable) is active and the SDM displays the
parameter in the selected color and a ‘?’ adjacent to the
parameter;
Unstable (grey): Alarm surveillance for the respective
parameter is not active and the SDM displays the parameter in
grey. PCO
2
, for example, is displayed in grey when stabilizing
after sensor application or occurrence of a ‘PCO
2
artifact’
(p. 30).
Invalid (‘---’): Alarm surveillance for the respective parameter
is not active and the SDM replaces the parameter with ‘---’.