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c. Check a chest-x-ray within one to four hours of initiating HFOV to
assess lung volume.
3. Set the power at 4.0 and rapidly increase it to achieve chest wiggle (a visual
vibration from shoulders to mid-thigh area).
a. Transcutaneous monitoring for CO
b. If PaCO
worsens (but pH > 7.2), increase the power setting to achieve a
2
change of amplitude in 10 cmH
the maximum setting.
c. If pH is < than 7.2, consider buffering pH.
d. An abrupt rise in PaCO
obstruction of the endotracheal tube until proven otherwise.
Note:
Some studies suggest a higher frequency setting (and corresponding
higher amplitude) may be more lung-protective.
(TcCO
2
O pressure increments every 30 minutes up to
2
in an otherwise stable patient should be considered an
2
13
) should be considered.
2
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