monitoring offers high and low limit alarms, and a high priority (red
level) oxygen desaturation alarm. For adult patients, the SpO
low limit can
be set between 50 and 99% inclusive, in 1% increments. For pediatric
patients, the SpO
low limit can be set between 30 and 99% inclusive, in 1%
increments. The desaturation limit is set automatically at 10 below the Low
Limit. You cannot set the low limit below the desaturation limit. The SpO
high alarm limit can be set between 51 and 100% inclusive, in 1%
increments for adult patients and set for pediatric patients between 31 and
100% inclusive, in 1% increments.
The delay between the physiologic alarm condition and alarm annunciation
at the MX40 is <16 seconds. This means that the MX40 will generate an
alarm if the averaged numeric value on the display exists beyond the alarm
limit for more than a maximum of 16 seconds.
Setting the high SpO
alarm limit to 100% is equivalent to switching off the
high alarm. Therefore the upper alarm limit for oxygen saturation must be
carefully selected in accordance with accepted clinical practices.
The default setting for SpO
yellow alarms is latched. That is, when an SpO
limit is exceeded, you will need to acknowledge it at the Information
Center. The sound will be silenced but the message will remain on the
display until the condition is resolved.
See the Alarms chapter for a list of the SpO