3 Monitoring
Monitoring
LIFEPAK 20 Defibrillator/Monitor Operating Instructions 3-11
©2002–2013 Physio-Control, Inc.
The sensors are sensitive to light. If excessive ambient light is present, cover the sensor site with an
opaque material to block the light. Failure to do so could result in inaccurate measurements.
If patient movements present a problem, consider the following possible solutions:
• Be sure the sensor is secure and properly aligned.
• Use a new sensor with fresh adhesive backing.
• If possible, move the sensor to a less active site.
Note: Wrapping the sensor too tightly or using supplemental tape to hold the sensor in place may
cause inaccurate measurements.
SpO2 Monitoring Procedure
The defibrillator controls power to the pulse oximeter. When the defibrillator is turned on, the oximeter
turns on and performs a self-test that requires up to 10 seconds. When the defibrillator is turned off,
the oximeter also turns off.
To conserve battery power, the pulse oximeter goes into “sleep mode” when not in use. Sleep mode is
activated within 10 seconds of disconnecting the sensor. During sleep mode, the screen does not
display SpO2 information. The oximeter returns to normal mode after detecting a sensor or a patient
signal. The oximeter performs the self-test when it returns from sleep mode to active mode.
The pulse oximeter measures SpO2 levels between 1% and 100%. When SpO2 levels are between
70% and 100%, oximeter measurements are accurate from ±3 digits. When the pulse oximeter
measures SpO2 levels less than 50%, the display shows < 50%.
To measure the patient’s SpO2 levels:
1 Connect the SpO2 cable to the monitor.
2 Attach the sensor to the SpO2 cable and the patient.
3 Press
ON.
4 Observe the pulse bar for fluctuation. Amplitude of the pulse bar indicates relative signal strength.
5 Adjust sensitivity, averaging time, and SpO2 volume as necessary.
SpO2 Waveform
The SpO2 waveform can be displayed on waveform Channel 2 by selecting waveform Channel 2 and
then selecting SpO2 from the Waveform menu. The SpO2 waveform automatically sizes itself to
provide optimum waveform viewing.
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