ANI Monitor V1 - Continouous analgesia monitoring system
MD/PRD/IN16.ANIV1 V.10 – 29 SEP 2021
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•
variable tidal volume during the measurement period (64 seconds)
•
irregular spontaneous ventilation (patient speaking, laughing or coughing)
•
pace maker (certain types)
•
cardiac graft
•
drugs affecting the sinus node (atropine, glycopyrrolate, etc.)
The ANI index is expressed on a scale between 0 and 100. It gives a reading of the proportion
of p
tone in the ANS. The ANI displayed is the result of measurements computation made
during 64 seconds, with a 1 second moving window.
There are multiple ways of interpreting the ANI result. One is probabilistic, as this ANI index
has been developed in order to predict hemodynamic reactivity during general anesthesia
(GA). When surgical stimulation was constant, all hemodynamic reactivity episodes (20%
increase of heart rate or systolic arterial pressure) were associated with a decreased ANI up to
10 min beforehand. The predictive threshold need yet to be established, but preliminary
studies suggest:
•
that an ANI measure between 50 and 70 during surgery under GA makes a
hemodynamic reactivity episode
unlikely
in the following 10 min
•
that an ANI of less than 50 makes hemodynamic reactivity
very likely
in the
following 10 min
3
ANI Monitor V1 installation
3.1
Clamping support
Position the monitor in order to use easily the power plug. The monitor could be installed on a
vertical clamp (figure 1). Mount the monitor using the pole clamp on a pole diameter from
0.75 to 1.49 inches.
Please ensure the pole is compatible.
