CO
2
Safety Information
9-14 EarlyVue VS30 Instructions for Use
• Microstream™ etCO
2
sampling lines are designed for single patient use, and are not to be
reprocessed. Do not attempt to clean, disinfect, sterilize or flush any part of the sampling line as
this can cause damage to the monitor.
• The sampling line may ignite in the presence of O
2
when directly exposed to laser, ESU devices,
or high heat. When performing head and neck procedures involving laser, electro-surgical
devices or high heat, use with caution to prevent flammability of the sampling line or surrounding
surgical drapes.
• Do not cut or remove any part of the sampling line. Cutting the sampling line could lead to
inaccurate readings.
• If too much moisture enters the sampling line (from ambient humidity or breathing of unusually
humid air), the message CO2 Purging will appear in the message area. If the sampling line cannot
be cleared, the message CO2 Occlusion will appear in the message area. Replace the sampling
line if the CO2 Occlusion message appears.
• Apnea alarming is suspended while the system performs an auto zero. The apnea detection timer
restarts after the auto zero is complete.
• With the Microstream™ CO
2
algorithm, the apnea timer starts after the first valid breath is
detected. The timer resets after each breath is detected.
Caution
• Ensure that tubing is not stretched during use.
• Dispose of sampling lines according to standard operating procedures or local regulations for the
disposal of contaminated medical waste.
•CO
2
sampling lines used with the monitor are marked with the upper limit of oxygen that may be
provided with the sampling line. At levels of oxygen provision higher than those marked on the
sampling line packaging, dilution of CO
2
readings may occur, leading to lower CO
2
values.
• When monitoring with capnography during sedation, please note that sedation may cause
hypoventilation and CO
2
waveform distortion or disappearance. Waveform attenuation or
disappearance is an indicator that the status of the patient's airway should be assessed.
• When monitoring patients during upper endoscopy, partial blockage of the oral airway due to
endoscope positioning may cause periods of low readings and rounded waveforms. The
occurrence will be more pronounced with high oxygen delivery levels.
• If CO
2
insufflation is performed during CO
2
monitoring, the etCO
2
values will accordingly rise very
significantly and this may result in device alarms and abnormally high waveforms until the CO
2
is
evacuated from the patient.
• In high-altitude environments, etCO
2
values may be lower than values observed at sea level, as
described by Dalton’s law of partial pressures. When using the monitor in high-altitude
environments, it is advisable to consider adjusting etCO
2
alarm settings accordingly.
• To protect the monitor from inadvertently drawing in liquids, do not connect the sampling line
until you are ready to begin monitoring. The CO
2
pump turns on, and stays on, when the
sampling line is connected.
• Do not use the CO
2
measurement if the CO
2
Calibration Needed technical alarm appears or if
annual service is due.
• To ensure CO
2
measurement accuracy, ask your system administrator to calibrate the CO
2
module as soon as the CO
2
Calibration Needed technical alarm appears. Also check the patient’s
vital signs by alternate means and make sure the monitor is functioning correctly.
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