RADIOMETER ABL800 FLEX - Page 172

ABL800 FLEX Reference Manual 6. Parameters
List of equations, Continued
ctO
2
(x)
(or c
x
)
(continued)
ctO
2
(a) is determined as described in equation 27.
ctO
2
(x) cannot be calculated on the basis of a default ctHb value.
ctO
2
(x) can only be calculated if the measured sO
2
(a) ≤ 0.97 (or if p50(st) is keyed
in).
The calculation requires entering the sample type as “Arterial” or “Capillary”.
Eq. 31:
D
·
O
2
DO tO
22
..
=×c Q
t
Q
·
t
is the cardiac output and is an input parameter for calculation of D
·
O
2
.
If Q
·
t
is not keyed in, D
·
O
2
will not be calculated.
The calculation requires entering the sample type as “Arterial” or “Capillary”.
Eq. 32:
Q
·
t
Q
VO
tO a v
t
.
.
=
−
2
2
c ()
If V
·
O
2
is not keyed in, Q
·
t
will not be calculated.
Eq. 33:
V
·
O
2
VO Q
22
..
=× −
t
tO a vc ()
If Q
·
t
is not keyed in, V
·
O
2
will not be calculated.
Eq. 34 [5]:
FShunt
F
cc
cc
Shunt =
tO c tO a
tO c tO v
22
22
() ()
() ( )
−
−
and
Eq. Description
34.1
F
cc
cc
Shunt
tO A tO a
tO A tO v
22
22
≅
−
−
() ()
() ()
Continued on next page
6-35