Edwards EV1000

B-3
Equations for Calculated Patient Parameters
SVRI Systemic Vascular Resistance Index
SVRI = {(MAP - CVP) x 80} /CI
where:
MAP - Mean Arterial Pressure, mmHg
CVP - Central Venous Pressure, mmHg
CI - Cardiac Index, L/min/m
2
dyne-s-m
2
/cm
5
SVV Stroke Volume Variation
SVV = 100 x (SVmax - SVmin) / mean(SV) %
VO
2
Oxygen Consumption
VO
2
= Ca-vO
2
x CO x 10 (mL O
2
/min)
where:
Ca-vO
2
– Arteriovenous Oxygen Content Difference, mL/dL
CO – Cardiac Output, L/min
mL O
2
/min
VO
2
e Estimated Oxygen Consumption when ScvO
2
is being monitored and used to calculate
Ca-vO
2
instead SvO
2
VO
2
e = Ca-vO
2
x CO x 10 (mL O
2
/min)
where:
Ca-vO
2
– Arteriovenous Oxygen Content Difference, mL/dL
CO – Cardiac Output, L/min
mL O
2
/min
VO
2
I Oxygen Consumption Index
VO
2
/ BSA
mL O
2
/min/m
2
VO
2
Ie Estimated Oxygen Consumption Index
VO
2
e/ BSA
mL O
2
/min/m
2
Table B-1 Cardiac Profile Equations (Continued)
Parameter Description and Formula Units