Mindray iMEC8 Vet, Руководство оператора

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11-4
11.5.3 Setting SpO
2
Sensitivity
For the Masimo SpO
2
module, you can set [ Sensitivity ] to [ Normal ] or [ Maximum ] in the [ SpO
2
Setup ] menu. When the
[
Sensitivity
] is set to [
Maximum
], the monitor is more sensitive to minor signals. When monitoring critically ill patients
whose pulsations are very weak, it is strongly recommended that the sensitivity is set to [ Maximum ]. When monitoring
neonatal or non-critically ill patients who tend to move a lot, noise or invalid signals may be caused. In this case, it is
recommended that the sensitivity is set to [
Normal ] so that the interference caused by motion can be filtered and
therefore the measurement stability can be ensured.
11.5.4 Changing Averaging Time
The SpO
2
value displayed on the monitor screen is the average of data collected within a specific time. The shorter the
averaging time is, the quicker the monitor responds to changes in the patient’s oxygen saturation level. Conversely, the
longer the averaging time is, the slower the monitor responds to changes in the patient’s oxygen saturation level, but
the measurement accuracy will be improved. For critically ill patients, selecting a shorter averaging time will help in
understanding the patient’s state.
To set the averaging time:

For the Mindray SpO
2
module, select [
Sensitivity
] in the [
SpO
2
Setup
] menu and then toggle between [
High
],
[ Med ] and [ Low ], which respectively correspond to 7 s, 9 s and 11 s.
 For the Masimo SpO
2
module, select [
Averaging
] in the [
SpO
2
Setup
] menu and then toggle between [
2-4 s
], [
4-6
s ], [ 8 s ], [ 10 s ], [ 12 s ], [ 14 s ] and [ 16 s ].
11.5.5 Monitoring SpO
2
and NIBP Simultaneously
When monitoring SpO
2
and NIBP on the same limb simultaneously, you can switch [
NIBP Simul
] on in the [
SpO
2
Setup
]
menu to lock the SpO
2
alarm status until the NIBP measurement ends. If you switch [ NIBP Simul ] off, low perfusion
caused by NIBP measurement may lead to inaccurate SpO
2
readings and therefore cause false physiological alarms.
11.5.6 Sat-Seconds Alarm Management
With traditional alarm management, high and low alarm limits are set for monitoring oxygen saturation. During
monitoring, as soon as an alarm limit is violated, an audible alarm immediately sounds. When the patient % SpO
2
fluctuates near an alarm limit, the alarm sounds each time the limit is violated. Such frequent alarms can be distracting.
Nellcor’s Sat-Seconds alarm management technique is used to reduce these nuisance alarms.
The Sat-Seconds feature is available with the Nellcor SpO
2
module to decrease the likelihood of false alarms caused by
motion artifacts. To set the Sat-Seconds limit, select [
Sat-Seconds
] in the [
SpO
2
Setup
] menu and then select the
appropriate setting.
With Sat-Seconds alarm management, high and low alarm limits are set in the same way as traditional alarm
management. A Sat-Seconds limit is also set. The Sat-Seconds limit controls the amount of time that SpO
2
saturation
may be outside the set limits before an alarm sounds. The method of calculation is as follows: the number of percentage
points that the SpO
2
saturation falls outside the alarm limit is multiplied by the number of seconds that it remains
outside the limit. This can be stated as the equation: