EDAN M3 User Manual

M3 Vital Signs Monitor User Manual SpO
2
Monitoring (Optional)
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8.6 SpO
2
Alarm Delay
There is a delay between a physiological event at the measurement site and the corresponding alarm
at the monitor. This delay has two components:
1. The time between the occurrence of the physiological event and when this event is represented
by the displayed numerical values. This delay depends on the algorithmic processing time and the
sensitivity. The lower the sensitivity configured, the longer the time needed until the numerical
values reflect the physiological event.
2. The time between the displayed numerical values exceeding an alarm limit and the alarm
indication on the monitor. This delay is the combination of the configured alarm delay time plus the
general system delay time.
8.7 Perfusion Index (PI)*
* Only applicable to the EDAN SpO
2
module.
PI is a numeric value indicating perfusion level. It reflects the perfusion level at the monitoring site.
As the measurement of SpO
2
is based on the pulsation caused by the blood flow through the
vessel, PI is in relation to the strength of the pulse. Also, you can use PI as a signal quality
indicator for the measurement of SpO
2
.
PI is indicated by a value ranging from 0 to 10. The bigger the value is, the better the perfusion
and the signal quality will be. The perfusion level and the signal quality are at their maximum
when the value reaches 10. When PI is below 2, it indicates the low perfusion and the poor signal
quality at the monitoring site; you need to reposition the sensor or find a better site.
The PI value will be displayed on the SpO
2
waveform area.
8.8 SatSeconds Alarm Management*
* Only applicable to the Nellcor SpO
2
module. Not applicable to MFM-CMS
8.8.1 Describing SatSeconds
With traditional alarm management, upper and lower alarm limits are set for monitoring oxygen
saturation. During monitoring, as soon as an alarm limit is violated by as little as one percentage
point, an alarm is immediately triggered. When the SpO
2
level fluctuates near an alarm limit, the
alarm is triggered each time the limit is violated. Such frequent alarms can be distracting.
With the SatSeconds technique, upper and lower SpO
2
alarm limits are set in the same way as
traditional alarm management. However, you can also set a SatSeconds limit that allows
monitoring of SpO
2
below the selected lower alarm limit and above the selected upper alarm limit
for a period of time before an alarm is triggered.
The method of calculation is as follows:
The number of percentage points that the SpO
2
falls outside the alarm limit is multiplied by the
number of seconds that the SpO
2
level remains outside that limit. This can be stated as an
equation:

EDAN M3 Specifications

General

Brand	EDAN
Model	M3
Category	Monitor
Language	English