13
Cautions
Only use with Zephyr approved parts and accessories.
Failure to use Zephyr approved parts and accessories will void the warranty.
The cables provided are designed for device use only and must not be used with other equipment; the
device must not be used with cables other than those provided. Misuse presents a risk for interference with
and/or damage to other equipment.
Do not blow into the Nasal Cannula connection to avoid causing damage to the device.
Avoid electrostatic discharge. The relative humidity should be at least 5%.
Avoid impeded blood flow (e.g. blood pressure cuff ) as this may affect pulse and saturation measurements.
Do not expose the device to open flames.
Do not prescribe this test for patients who are unable to breathe comfortably through their nose while
supine.
Do not soak or immerse the device or sensors in water, solvents or cleaning solutions.
Do not use a Pulse Oximeter sensor with exposed optical components.
Do not autoclave, pressure sterilize, or gas sterilize the device.
If the accuracy of any measurement does not seem reasonable, first check the patient’s vital signs by an
alternate means. Inaccurate oximetry measurements may be caused by:
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Incorrect sensor application or use
Significant levels of dysfunctional hemoglobin (e.g. carboxyhemoglobin, methemoglobin)
Intravascular dyes (e.g. indocyanine green, methylene blue)
Interfering substances: Dyes, nail polish or any substance containing dyes that change usual blood
pigmentation may cause erroneous readings
Exposure to excessive illumination, such as surgical lamps (especially ones with a xenon light source),
bilirubin lamps, fluorescent lights, infrared heating lamps, or direct sunlight. Exposure to excessive
illumination can be corrected by covering the sensor with a dark or opaque material.
Excessive patient movement or motion artifacts
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The oxygen saturation measured via pulse oximetry (i.e. SpO2) is empirically calibrated to functional arterial
oxygen saturation in healthy adult volunteers with normal levels of carboxyhemoglobin (COHb) and
methemoglobin (MetHb). A Pulse Oximeter cannot measure elevated levels of COHb or MetHb. Increases
in either COHb or MetHb will affect the accuracy of the oximetry measurement.
Venous congestion may cause erroneous low readings of actual arterial oxygen saturation. Therefore,
assure proper venous outflow from monitored site. Sensor should not be below heart level (e.g. sensor on
hand of a patient in a bed with arm dangling to the floor).
Venous pulsations may cause erroneous low readings (e.g. tricuspid value regurgitation)
Patients who suffer from abnormal pulse rhythms
The pulsations from intra-aortic balloon support can be additive to the pulse rate on the Pulse Oximeter
pulse rate display. Verify patient’s pulse rate against the ECG pulse.
Elevated levels of total bilirubin may lead to inaccurate oximetry measurements
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