Physio Control LIFEPAK 20, Manual

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3
M
o
nitoring
Monitoring
LIFEPAK 20e Defibrillator/Monitor Operating Instructions 3-11
©2006-2015 Physio-Control, Inc.
Figure 3-4
How a Pulse Oximeter Works
The quality of the SpO
2
reading depends on correct sensor size and placement, adequate blood
flow through the sensor site, patient motion, and exposure to ambient light. For example, with
very low perfusion at the monitored site, readings may read lower than core arterial oxygen
saturation. Test methods for accuracy are available by contacting your local Physio-Control
representative.
SpO
2
Monitoring Considerations
Each oximeter sensor is applied to a specific site on the patient. Use the following criteria to
select the appropriate sensor:
• Patient weight
• Patient perfusion to extremities
• Patient activity level
• Available application sites on the patient’s body
• Sterility requirements
• Anticipated duration of monitoring
To help ensure optimal and accurate performance:
• Use a dry and appropriately sized sensor.
• Keep the sensor site at the same level as the patient’s heart.
• Apply the sensor according to the Directions for Use provided with the sensor.
• Observe all warnings and cautions noted in the sensor’s Directions for Use.
The sensors are sensitive to light. If excessive ambient light is present (such as sunlight, surgical
lights, or bilirubin lamp), 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.
Sensor (holds LEDs
and detector)
Red Infrared
Light emitting
diodes
Light receiving
detector