Product Manual

Patient Monitor User Manual Calculation
- 135 -
Items
Unit
English Full Name/Description
PvO
2
mmHg
Partial pressure of oxygen in venous blood
SvO
2
%
Venous oxygen saturation
Hb
g/L
Hemoglobin
RQ
/
Respiratory quotient
Height
cm
Height
Weight
kg
Weight
CI
L/min/m
2
Cardiac index
20.3.3 Output Parameters
Items
Unit
English Full
Name/Description
Formula
BSA
m
2
Body surface
area
BSA=Weight
0.425
*Height
0.725
*0.007184
VO
2
ml/(min.
m
2
)
Calculated
oxygen
consumption
VO
2
=C
a v
O
2
*CI
C a-v O
2
ml/L
Arterial venous
oxygen content
difference
C
a v
O
2
= CaO
2
-CvO
2
O
2
ER
%
Oxygen
extraction ratio
O
2
ER=VO
2
/ DO
2
*100%
DO
2
ml/(min.
m
2
)
Oxygen
transport
DO
2
=CaO
2
*CI
PAO
2
mmHg
Partial pressure
of oxygen in the
alveoli
PAO
2
= PiO
2
-PACO
2
×[FiO
2
/100%+
(1-FiO
2
/100%) / RQ]
AaDO
2
mmHg
Alveolar-arterial
oxygen
difference
AaDO
2
=PAO
2
-PaO
2
Cc’O
2
ml/L
Capillary
oxygen content
Cc'O
2
=PAO
2
×0.003+1.34 × SaO
2
/100%× Hb
Qs/Qt
%
Venous
admixture
Qs/Qt=(Cc'O
2
-CaO
2
)/(Cc'O
2
-CvO
2
)*100%
C.O.
L/min
Cardiac output
C.O. = VO
2
/[ Ca--v O
2
×BSA]
AaDO
2
/PaO
2
%
AaDO
2
/PaO
2
AaDO
2
/PaO
2
=(PAO
2
-PaO
2
)/PaO
2
*100%
DO
2
I
ml/(min.
m
2
)
Oxygen
delivery index
DO
2
I=DO
2
/BSA
VO
2
I
ml/(min.
m
2
)
Oxygen
consumption
index
VO
2
I=VO
2
/BSA
CaO
2
ml/L
Calculated
arterial oxygen
content
CaO
2
=(Hb)*1.34*SaO
2
/100%+(0.0031*PaO
2
)