What is the purpose of tracheal gas insufflation?
A. to reduce functional dead space
B. to supplement the patient's inspired Vt with gas flow to match the preset Vt during spontaneous breathing modes
C. to provide additional inspiratory flow when the patient's inspiratory demands increase during spontaneous breathing modes
D. to supply the patient with further pressure when the patient is being administered either PSV, CPAP with PSV, or SIMV with PSV
ANS: A
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