Monitoring SpO
2
8Pulse Oximetry
99
Pleth Wave
When the sensor is connected to the HeartStart MRx, the pleth wave is displayed in the configured
Wave Sector or the first available empty Wave Sector. It is drawn at an approximate speed of 25 mm/
second. Grid lines are displayed to indicate signal quality.When signal quality is good, the pleth wave is
auto scaled to the grid lines. When signal quality is poor, the size of the pleth wave is proportionately
decreased.
Figure 58 Pleth Wave Size
When the Therapy Knob is moved to an energy setting, the SpO
2
values and pleth wave continue to be
displayed as long as they are not located in Wave Sector 2 or you’re in Q-CPR View. When the
Therapy Knob is moved to Pacer, the pacing status bar appears in Wave Sector 4, replacing the
waveform in that sector. If the pleth wave was removed, the SpO
2
and Pulse values and alarm settings
are retained. If the Therapy Knob is moved to AED, SpO
2
and pulse related information is no longer
monitored.
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