Mindray BeneView T1, Руководство оператора

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11-3
11.5 Changing SpO
2
Settings
11.5.1 Accessing SpO
2
Menus
By selecting the SpO
2
parameter window or waveform area, you can access the [
SpO2 Setup
] menu.
11.5.2 Setting SpO
2
Sensitivity
For Masimo SpO
2
module, you can set [
Sensitivity
] to [
Normal
] or [
Maximum
] in the [
SpO2 Setup
] menu. When
the [
Sensitivity
] is set to [
Maximum
], the patient 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.
11.5.3 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 patient monitor responds to changes in the patient’s oxygen saturation level.
Contrarily, the longer the averaging time is, the slower the patient monitor responds to changes in the patient’s oxygen
saturation level, but the measurement accuracy will be improved. For critically ill patients, selecting shorter averaging
time will help understanding the patient’s state.
To set the averaging time:

For Mindray SpO
2
module, select [
Sensitivity
] in the [
SpO2 Setup
] menu and then toggle between [
High
],
[
Med
] and [
Low
], which respectively correspond to 7 s, 9 s and 11 s.

For Masimo SpO
2
module, select [
Averaging
] in the [
SpO2 Setup
] menu and then toggle between [
2-4 s
],
[
4-6 s
], [
8 s
], [
10 s
], [
12 s
], [
14 s
] and [
16 s
].
11.5.4 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.
11.5.5 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 alarm 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 [
SpO2 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