Of the following breath descriptions, which one is considered spontaneous?
a. Flow triggered, pressure limited, flow cy-cled
b. Time triggered, volume limited, volume cycled
c. Pressure triggered, pressure limited, time cycled
d. Patient triggered, patient cycled, baseline pressure +5 cm H2O
ANS: D
Flow triggered and pressure triggered mean that the patient has initiated the breath. Pressure lim-ited and volume limited mean that either one of these variables is not allowed to be exceeded during a breath. This occurs with either ventilator or assisted breaths. Patient triggered could ei-ther be pressure or flow and could be part of a spontaneous breath as long as the pressure during inspiration does not rise above the baseline setting. During spontaneous breathing the patient will control both the beginning and the ending of the breath.
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