OPTIMedical OPTI CCA-TS - Page 189

Operator’s Manual – OPTI CCA-TS PCO2-3
ANALYTES PCO
2
Linearity
3
Wherever possible, linearity for the OPTI CCA measurement has been established against reference
materials or methods. PCO
2
linearity is established against values determined on whole blood
tonometered to gravimetrically prepared gases with CO
2
concentrations certied to 0.03% absolute by the
manufacturer, and measured on three OPTI CCA systems.
Correlation
 Slope Intercept Coefcient Sy.x  Range  n
0.9681 2.148 0.99967 1.53 11 - 201 81
Correlation to Other Methods
3
OPTICCAvsotherpH/BloodGasInstrumentsonwholebloodinatypicalsetting
Excess blood aliquots from specimens collected for blood gas analyses were analyzed by both traditional
and non-traditional operators of blood gas equipment in hospital laboratories. The blood was analyzed on
the OPTI CCA after obtaining the requisite results from existing instrumentation used for these analyses
and operated and controlled following their established procedures.
Correlation
ComparativeMethod* Slope Intercept Coefcient Sy.x Range n
Analyzer A (whole blood) 0.9751 1.623 0.9871 1.16 28 – 72 103
Analyzer B (whole blood) 0.9740 2.66 0.9937 1.12 24 – 92 173
Analyzer C (whole blood) 0.988 ± 0.022 0.807± 1.015 0.9750 2.584 23 – 81 105
Analyzer D (whole blood) 1.073 ± 0.011 -2.785 ± 0.521 0.9910 2.050 17 – 122 174
Analyzer E (whole blood) 1.067 ± 0.009 -4.41 ± 0.468 0.9936 1.817 22 – 120 183
* For more information on specic analyzers used, please contact OPTI Medical Technical Support.
References
1. Tietz, Norbert W., Ed., Clinical Guide to Laboratory Tests, 2nd Ed., (Philadelphia: W.B.Saunders,
Co., 1990) p. 436
.
2. Vurek GG, Feustel PJ, Severinghaus JW, A Fiber Optic PCO
2
Sensor, Ann.Biomed.Eng. 11, p.499,
1983.
3. OPTI Medical. Model equation for regression statistics is: [results of OPTI Analyzer] = slope(m)
[comparative method results] + intercept(b).