RADIOMETER ABL800 FLEX Reference Manual

6. Parameters ABL800 FLEX Reference Manual
List of equations, Continued
FShunt
(continued)
Eq. Description
34.2
F
cc
cc
Shunt =
tO a tO v
tO A tO a
22
22
1
1
+
−
−
⎡
⎣
⎢
⎤
⎦
⎥
−
() ()
() ()
where
ctO
2
(c): total oxygen in pulmonary capillary blood
ctO
2
(a): total oxygen in arterial blood
ctO
2
(A): total oxygen in alveolar blood. Oxygen tension = pO
2
(A)
ctO
2
(v
–
): total oxygen in mixed venous blood
34.3
(
)
(a)OMetHbCOHb1tHb(a)O1083.9)a(tO
22
3
2
sFFcpc ×−−×+×=
−
34.4
()
(A)OMetHbCOHb1
tHb(A)O1083.9)A(tO
2
2
3
2
sFF
cpc
×−−
×+×=
−
34.5
()
)v(OMetHbCOHb1
tHb)v(O1083.9)v(tO
2
2
3
2
sFF
cpc
×−−
×+×=
−
where:
pO
2
(a): oxygen tension in arterial blood; measured.
pO
2
(A): oxygen tension in alveolar blood. See equation 15.
pO
2
(v
–
): oxygen tension in mixed venous blood; measured and then
entered.
sO
2
(a): oxygen saturation in arterial blood; can be measured.
sO
2
(A): oxygen saturation in (alveolar) blood calculated from equation 39
where P = pO
2
(A). If sO
2
(a) > 0.97, a keyed-in p50(st) will be used to
determine the ODC. If sO
2
(a) > 0.97 and no p50(st) has been keyed in, the
default value (3.578 kPa) will be used to determine the ODC.
sO
2
(v
–
): oxygen saturation in mixed venous blood.
If not keyed in, it will be calculated from equation 39 where P = pO
2
(v
–
).
If sO
2
(a) > 0.97, a keyed-in p50(st) will be used to determine the ODC.
The calculation requires entering the sample type as “Arterial” or
“Capillary”.
If sO
2
(a) > 0.97 and no p50(st) has been keyed in, the default value (3.578
kPa) will be used to estimate the ODC.
If no venous sample is measured, FShunt is estimated assuming:
ctO
2
(a) – ctO
2
(v
–
) = 2.3 mmol/L in equation 34.2
Continued on next page
6-36

RADIOMETER ABL800 FLEX Specifications

General

Brand	RADIOMETER
Model	ABL800 FLEX
Category	Measuring Instruments
Language	English