Ventilator Work Of Breathing (Wobv); Patient Work Of Breathing (Wobp) - CareFusion AVEA Operating Instructions Manual

AVEA ventilator systemsAppendix G: Advanced Pulmonary Mechanics Monitored Parameters
Ventilator Work of Breathing (WOB
Ventilator Work of Breathing (WOB
baseline airway pressure (PEEP
inspiration, and normalized to the total inspiratory tidal volume (V
If P
WOB
Range:
Resolution:
Accuracy:
Patient Work of Breathing (WOB
Patient Work of Breathing (WOB
breathing is defined as the summation of two work components: work of the lung and work of the chest
wall.
Work of the lung (WOB
pressure (PEEP
Work of the chest wall (WOB
of the total tidal volume delivered due to a patient effort (V
Range:
Resolution:
Accuracy:
Note:
Requires an esophageal balloon catheter.
L2786 Rev. M
> PEEP ,
AW AW
∑
P PEEP
( −
AW
Insp
=
V
V
ti
0.00 to 20.00 Joules/L
0.01 Joules/L
± 10%
) (Normalized to Delivered Tidal Volume)
P
WOB = WOB + WOB
P LUNG
where WOB
and WOBCW =
) is calculated using esophageal pressure when the baseline esophageal
LUNG
) is greater than the esophageal pressure (P
ES
CW
0.00 to 20.00 Joules/L
0.01 Joules/L
± 10%
)
V
), is defined as the summation of airway pressure (P
V
) times the change in tidal volume to the patient (∆V) during
AW
V
) ∆
AW
), normalized to the total inspiratory tidal volume. Patient work of
P
CW
Tiend
∑
= ( PEEP − P
ES
LUNG
Testart
V
2
P
(if PEEP
C
2
CW
) for a spontaneously breathing patient is calculated using only the portion
).
ti
) ∆ V (if PEEP
> P
ES
ES
> P )
ES ES
), indicating patient effort.
ES
) and the chest wall compliance (C
P
229
) minus the
AW
and V > 0)
ES
).
CW