RADIOMETER ABL800 FLEX - Page 157

6. Parameters ABL800 FLEX Reference Manual
Derived parameters, Continued
Oxygen derived
parameters
(continued)
Symbol Definition Type Eq.
pO
2
(a/A) Ratio of the partial pressure (or tension) of
oxygen in arterial blood and alveolar air.
Indicates the efficacy of the oxygenation process
in the lungs.
dv
24
pO
2
(a/A,T) Ratio of the partial pressure (or tension) of
oxygen in arterial blood and alveolar air at
patient temperature.
dv
25
pO
2
(x) or p
x
Oxygen extraction tension of arterial blood.
Reflects the integrated effects of changes in the
arterial pO
2
(a), ctO
2
, and p50 on the ability of
arterial blood to release O
2
to the tissues [8].
dv
26
pO
2
(x,T) or
p
x
(T)
Oxygen extraction tension of arterial blood at
patient temperature.
dv
ctO
2
(B) Total oxygen concentration of blood.
Also termed O
2
content.
dv
27
ctO
2
(a−v
–
)
Oxygen concentration difference between
arterial and mixed venous blood.
dv
28
BO
2
Hemoglobin oxygen capacity; the maximum
concentration of oxygen bound to hemoglobin in
blood saturated, so that all deoxyhemoglobin is
converted to oxyhemoglobin.
dv
29
ctO
2
(x) Extractable oxygen concentration of arterial blood.
Defined as the amount of O
2
which can be
extracted per liter of arterial blood at an oxygen
tension of 5.0 kPa (38 mmHg), maintaining
constant pH and pCO
2
[8].
dv
30
D
·
O
2
Oxygen delivery; the total amount of oxygen
delivered to the whole organism per unit of time.
dv
31
Q
·
t
Cardiac output; volume of blood delivered from
the left ventricle into the aorta per unit of time.
Also termed CO or C.O.
dv/in
32
V
·
O
2
Oxygen consumption; total amount of oxygen
utilized by the whole organism per unit of time.
dv/in
33
FO
2
(I) Fraction of oxygen in dry inspired air. in
Continued on next page
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