CareFusion AVEA, Quick Tips

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Normal values and indications for weaning (adults)
Parameter Normal range Indications for
weaning
Respiratory rate 10 to 20 breaths/minute < 30 B/min △
Esophageal pressure 5 to 10 cmH
2
O < 15 cmH
2
O
Tidal volume 7 to 10 mL/kg > 5 mL/kg
△
Minute ventilation 5 to 10 Liters/min < 10 L/min
WOB
P
3 to 0.6 Joules/Liter < 0.75 J/L
△
Pressure time index 0.05 to 0.12 < 0.15
△
Airway resistance 2 to 5 cmH
2
O/L/s < 15 cmH
2
O/L/s
Lung compliance 50 to 100 mL/cmH
2
O > 25 mL/cmH
2
O
Maximum inspiratory -30 cmH
2
O low effort > -20 cmH
2
O
△
Pressure (MIP) -140 cmH
2
O high effort
Auto PEEP 0 < 3 cmH
2
O
Respiratory drive P0.1 2 to 4 cmH
2
O < 6 cmH
2
O △
f/VT 60 to 90 < 105
Pressure time 200 to 300 cmH
2
O sec/min
Product (PTP)
Ti/TTOT 0.3 to 0.4
Parameter Acceptable range
SaO
2
> 90% on FlO
2
of < 40%
P(A - a) O
2
on
FlO
2
of 100%
< 350 mmHg
PaO
2
/FlO
2
> 200 mmHg
Qs/Qt < 20%
Vd/Vt < 0.6
Heart rate > 70 and < 120 bpm
Mean blood pressure > 70 and < 110 mmHg