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