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System Administration 5Ć15
If you change parameter units for pH after the system has started to collect data,
QC statistics are still computed in the current units.
Use this procedure to define the values for ctHb and p50 that the system uses when
no value is entered or measured, and to define the value for the O
2
binding factor
and ctO
2
(a-v), which are constants supplied by the system. The system uses these
values for certain calculations. Table 5-5 lists the default values and valid ranges
for ctHb, O
2
binding factor, p50, and ctO
2
(a-v).
ctHb 2.0 – 25.0
20 – 250
1.2 – 15.5
15.0 g/dL
g/L
mmol/L
p50 0.0 – 100.0
0.00 – 13.32
26.5 mmHg
kPa
O
2
Binding 1.35 – 1.39 1.39
ctO
2
(a-v) 0.0 – 20.0
0 – 200
0.0 – 9.0
3.5 mL/dL
mL/L
mmol/L
1. Access the Units and Values screen from the Menu screen:
a. Select
5 Operating Setup and press Enter.
b. Select
4 Units/Values and press Enter.
The first Units and Values screen appears.
2. Press
Next Screen.
The second Units and Values screen appears as shown in Figure 5-7.
5
Menu Code
4