RADIOMETER ABL800 FLEX, Справочное руководство

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ABL800 FLEX Reference Manual 6. Parameters
Derived parameters,
Continued
Oxygen derived
parameters
Symbol Definition Type Eq.
p
O
2
(
T
) Partial pressure (or tension) of oxygen at patient
temperature.
dv
14
p
O
2
(A) Partial pressure (or tension) of oxygen in
alveolar air. dv
15
p
O
2
(A,
T
) Partial pressure (or tension) of oxygen in
alveolar air at patient temperature. dv
16
p
O
2
(a)/
F
O
2
(I)
Oxygen tension ratio of arterial blood and the
fraction of oxygen in dry inspired air dv
17
p
O
2
(a,
T
)/
F
O
2
(I)
Oxygen tension ratio of arterial blood at patient
temperature and the fraction of of oxygen in
dry inspired air dv
18
p
50 Partial pressure (or tension) of oxygen at half
saturation (50 %) in blood.
High and low values indicate decreased and
increased affinity of oxygen to hemoglobin,
respectively.
dv
19
p
50(
T
) Partial pressure (or tension) of oxygen at half
saturation (50 %) in blood at patient
temperature. dv
20
p
50(st) Partial pressure (or tension) of oxygen at half
saturation (50 %) in blood at standard
conditions: temperature = 37
o
C
pH = 7.40
p
CO
2
= 5.33 kPa
F
COHb,
F
MetHb,
F
HbF set to 0
p
50(st) may however vary due to variations in
2,3-DPG concentration or to the presence of
abnormal hemoglobins.
dv/in
21
p
O
2
(A
−
a)
Difference in the partial pressure (or tension) of
oxygen in alveolar air and arterial blood.
Indicates the efficacy of the oxygenation process
in the lungs.
dv
22
p
O
2
(A
−
a,
T
)
Difference in the partial pressure (or tension) of
oxygen in alveolar air and arterial blood at
patient temperature. dv
23
Continued on next page
6-19