User & Service Manual
Trex™ HD Monitoring Amplifier
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10.4. Measurements
This pulse oximeter module is designed to determine the percentage of arterial oxygen saturation of
functional hemoglobin.
Pulse rate and SpO
2
values are updated every 1/3 second and consist of a 4-beat average.
Measurement Wavelengths and Output Power
•
Red: 660 nanometers @ 0.8 mW max. avg.
•
Infrared: 910 nanometers @ 1.2 mW max. avg. (using Nonin PureLight® sensor)
Factors that may degrade pulse oximeter performance or affect the accuracy of
the measurement include the following:
•
excessive ambient light
•
excessive motion
•
electrosurgical interference
•
blood flow restrictors (arterial catheters, blood pressure cuffs, infusion lines, etc.)
•
moisture in the sensor
•
improperly applied sensor
•
incorrect sensor type
•
poor pulse quality
•
venous pulsations
•
anemia or low hemoglobin concentrations
•
cardiogreen or other intravascular dyes
•
carboxyhemoglobin
•
methemoglobin
•
dysfunctional hemoglobin
•
artificial nails or fingernail polish
•
a sensor not at heart level
10.5. Displayed Ranges
Displayed ranges for the Nonin Xpod 0 to 100% for SpO
2
, 18 to 321 BPM for pulse rate
5
This information is especially useful to clinicians.