VENTILATOR : 10 seconds – give the pulmonary stance of a patient by looking at the ventilator and / or everything around the room that is pulmonary related >> performing an evaluation and having a conclusion within 10 seconds.
Glance at the following quickly :
Type & Mode of Ventilation : VCV vs. PCV ; AC vs. SIMV vs. PSV
PEEP : hi / lo / normal
FiO2 : hi / lo / normal
P/F ratio : hi / lo / normal
Lung compliance : hi / lo / normal
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VCV – likely that the patient is normal.
PCV – likely that the patient is sick.
PEEP > 14 – likely that the patient is sick.
P/F ratio < 300 – likely that the patient is sick.
Lung compliance : round off delivered Vt >> round off dP (change in press).
dV / dP – change in volume / change in pressure = compliance.
compliance < 40 : likely that the patient is sick.
Ex : PS=10 yields a spontaneous Vt=500 >> Complinace = 500 / 10 = 50
PCV=30 yields a Vt=1200 >> Compliance = 1200 / 30 = 40