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
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• 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
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This information is especially useful to clinicians.
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