Appendix
Page E-14
Operator’s Manual PiCCO
2
Version 3.1
ITBVI = ITBV / PBSA
where
ITBVI
=
Intrathoracic Blood Volume Index (ml/m
2
)
ITBV
=
Intrathoracic Blood Volume (ml)
PBSA
=
Predicted Body Surface Area (m²)
SVV = (SV
max
–
SV
min
) / SV
mean
where
SVV
=
Stroke Volume Variation (%)
SV
max
=
Mean value of 4 maximum stroke volumes of the last
30 seconds (ml)
SV
min
=
Mean value of 4 minimum stroke volumes of the last
30 seconds (ml)
SV
mean
=
Mean value of stroke volumes over the last 30 seconds (ml)
PPV = (PP
max
–
PP
min
) / PP
mean
where
PPV
=
Pulse Pressure Variation (%)
PP
=
Pulse Pressure (AP
sys
- AP
dia
)
AP
sys
=
Systolic Arterial Pressure
AP
dia
=
Diastolic Arterial Pressure
PP
max
=
Mean value of 4 maximum Pulse Pressures of the last 30 seconds
(mmHg)
PP
min
=
Mean value of 4 minimum Pulse Pressures of the last 30 seconds
(mmHg)
PP
mean
=
Mean value of pulse pressure over the last 30 seconds (mmHg)
5.4
Afterload
SVR = [(MAP
–
CVP) / CO]
x
80
where
SVR
=
Systemic Vascular Resistance (dyn
x
s
x
cm
-5
)
MAP
=
Mean Arterial Pressure (mmHg)
CVP
=
Central Venous Pressure (mmHg)
CO
=
Cardiac Output (l/min)
SVRI = [(MAP-CVP) / CI]
x
80
where
SVRI
=
Systemic Vascular Resistance Index (dyn
x
s
x
cm
-5
x
m
2
)
MAP
=
Mean Arterial Pressure (mmHg)
CVP
=
Central Venous Pressure (mmHg)
CI
=
Cardiac Index (l/min/m
2
)