OPTi CCA-TS2, Руководство оператора, Страница: 284 / 299

A-12 Operator’s Manual – OPTI CCA-TS2
APPENDIX A - TECHNICAL SPECIFICATIONS
AaDO
2
The alveolar to arterial oxygen tension gradient ( P AO
2
- P aO
2
) is the difference between the
alveolar oxygen tension, estimated above, and the measured oxygen tension of arterial blood.
PAO
2
= (P
total
– 47) FIO
2
– PACO
2
[FIO
2
+ (1 - FIO
2
)/R] [mmHg]
7
PACO
2
= PaCO
2
(alveolar PCO
2
)
Apply above equation for PAO
2
≥ PO
2
, otherwise PAO
2
= PO
2
pH
t
pH corrected to patient temperature other than 37 ºC.
) 37 t ( )] 4 . 7 pH ( 0065 . 0 0147 . 0 [ pH pH
t
− ⋅ − ⋅ + − =
[pH-unit]
7
cH
+t
Concentration of hydrogen ions corrected to patient temperature other than 37 ºC.
c H t pHt = − 10 9 ( )
[nmol/L]
6
PCO
2
t
P CO
2
value corrected to patient temperature other than 37 ºC.
P P CO CO
t t
2 2
0 019 37
10 = ⋅
⋅ − . ( )
[mmHg]
7
PO
2
t
P O
2
value corrected to patient temperature other than 37 ºC.
( )
P P
2
P
P
O O
t
O
O
t
= ⋅
⋅ − ⋅ +
⋅ − ⋅ +








⋅ −
2
5 4910 11
23 88 0 071
9 7210 9
23 88 2 30
37
10
.
.
.
.
.
.
[mmHg]
6
AaDO
2
t
Alveolar to arterial oxygen tension difference corrected to patient temperature other than 37 ºC.
AaDO AO aO
t t t
2 2 2
= −
P P
[
mmHg]
7
where:
PAO
2
t
= (P
total
– PH
2
O
t
) FIO
2
– PACO
2
t
[FIO
2
+ (1 – FIO
2
)/R]
with PH
2
O
t
= 47 * 10
[0.0237 – 0.0001 (t-37)] (t-37)
and
PACO
2
= PaCO
2
(alveolar PCO
2
= arterial PCO
2
)
Apply above equation for PAO
2
t
≥ PO
2
t
, otherwise PAO
2
t
= PO
2
t