Sentec LuMon System - 8.5 Checking the Adequacy of the Selected Analysis Mode

Belt application and initiating monitoring
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8.5 Checking the adequacy of the selected Analysis Mode
This sub-section and in particular Table 8-1 provide guidance to check adequacy of the selected Analysis Mode
(9.7). The adequacy of the selected Analysis Mode must be checked
• after initiating monitoring (8)
• while monitoring the patient (9) before evaluating breathing-related EIT images and indices or at least
every 8 hours
• when reviewing trend data.
In the examples shown in Table 8-1 the displayed time range is 15 seconds, i.e. the rate of the illustrated
breathing-related and cardiac-related Lung Impedance changes is approximately 16 bpm and 96 bpm
respectively. The dark blue and red dots mark local maxima and minima of the Plethysmogram and help to
visualize maximal Lung Impedance change. The Plethysmogram (9.4) is displayed auto-scaled on the LuMon
Monitor and therefore only shows relative Lung Impedance changes. Consequently, the absolute magnitude of
breathing- or cardiac-related Lung Impedance changes are not displayed, however their relative magnitude
can be visualized in relation to each other as shown in Table 8-1.
Table 8-1: Guidance to verify adequacy of the selected Analysis Mode. See color key below the table.
Breathing pattern
regular
irregular and/or weak
not visible or none
Maximal Lung
Impedance changes
Plethysmograms in the
examples and on the
LuMon Monitor are
auto-scaled.
(a) mainly breathing-related
(c) mainly breathing-related
(e) mainly related to lung
volume changes
cardiac-related changes not
visible
cardiac-related changes not
visible
cardiac-related changes visible;
breathing-related changes not
visible
(b) mainly breathing-related
(d) breathing- & cardiac-related
(f) mainly cardiac- or noise-
related
cardiac-related changes visible
breathing- and cardiac-related
changes visible
breathing-related changes not
visible
Breaths detected
frequently
frequently to infrequently
infrequently
RRi values available
frequently
frequently to infrequently
infrequently
BB mode
Breathing-related EIT
images and indices
available for each
detected breath
no data available
TB-I mode
Breathing-related EIT
images and indices
available every 15
seconds
available data may
not be meaningful
TB-II mode
Aeration available every
15 seconds
Color key:
mode generally adequate
mode generally not adequate
BB mode is adequate to analyze episodes during which the Plethysmogram (9.4) reflects quite regular
breathing, basically, when most breaths can be detected (9.5) reliably and RRi values (9.6) are frequently