9-8 250cx Series Maternal/Fetal Monitor Revision C
2036946-001
Maternal Pulse Oximetry Monitoring: MSpO2 Technology
After approximately
10.9 seconds the SatSeconds alarm would sound, because 50
SatSeconds (the assumed SatSeconds limit in this example) had been exceeded.
Alarm Response with SatSeconds
Saturation levels may fluctuate rather than remain steady for a period of several
seconds. Often, the SpO
2
levels may fluctuate above and below the alarm limit, re-
entering the non-alarm range several times.
During such fluctuations, the pulse oximeter integrates the number of SpO
2
points,
both positive and negative, until either the SatSeconds limit (SatSeconds time
setting) is reached, or the SpO
2
level returns to within a normal range and remains
there.
SatSeconds “Safety Net”
The SatSeconds “Safety Net” is for patients with saturation levels having frequent
excursions below the limit, but not staying below the limit long enough for the
SatSeconds time setting to be reached.
Using SatSeconds
The SatSeconds option is located in the Service Mode.To activate SatSeconds, your
biomed sets the SatSeconds limit (Off, 10, 25, 50, or 100) that suits the clinical
environment and patient condition. To deactivate SatSeconds, your biomed sets the
SatSeconds limit to Off. When it is set to Off, the alarm sounds immediately without
any delay.
The SatSeconds factory default setting is set at 10 SatSeconds. To change this setting
refer to your biomed or 250/250cx Series Service Manual.
IMPORTANT: If you set SatSeconds to Off, the monitor behavior will
change. Any brief desaturation event will cause the monitor to alarm.
4
6
88
90
0 1 2 3 4 5 6 7 8 9 10 1
SECONDS
SpO
2
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