Page E-1
Appendix E Specifications
Measurement Range
Measured Parameters
pH 6.001 - 8.000 (10.0 - 997.7 nmol/L H
+
)
pCO
2
5.0 - 250.0 mmHg (0.67 - 33.33 kPa)
pO
2
0.0 - 749.0 mmHg (0.00 - 99.86 kPa)
pAtm 400 - 825 mmHg (53.3 - 110.0 kPa)
Calculated Parameters
HCO
3
–
(act and std) 0.0 - 60.0 mmol/L
BE (ecf and B) ±29.9 mmol/L
ctCO
2
0.0 - 60.0 mmol/L
O
2
SAT 0.0 - 100.0%
O
2
CT 0.0 - 40.0 mL/dL
pO
2
(A-a) 0.0 - 749.0 mmHg (0.00 - 99.86 kPa)
pO
2
(a/A) 0.00 - 1.00
Method Comparison
A comparison of whole blood samples run on four 248 analyzers and the
Ciba Corning Model R for pH, and tonometered precision gases for
pCO
2
and pO
2
was performed.
The linear regression analysis equation is y = mx + b.
C of C is the coefficient of correlation.
pH
n Range Equation C of C
335 6.776 - 7.614 M248 = Model R x 1.015 - 0.107 0.995
pCO
2
n Range Equation C of C
338 14.2 - 250.0 M248 = Tonometry Gas Value x 1.008 - 0.304 0.999
pO
2
n Range Equation C of C
297 28.6 - 640.7 M248 = Tonometry Gas Value x 1.006 - 0.195 0.999
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