Lac-4 Operator’s Manual – OPTI CCA-TS2
LACTATE ANALYTES
Linearity
Wherever possible, linearity for the OPTI CCA-TS measurement has been established against reference
materials or methods. Linearity for the measurement of Lactate has been established versus the
gravimetric concentration of Lactate in a dilution sequence of aqueous buffers following CLSI guideline
EP6-A. No changes were made to the Lactate sensor or the measurement principle, so the linearity of the
OPTI CCA-TS2 is equivalent to the OPTI CCA-TS.
Correlation
Slope Intercept Correlation
Coefcient
Sy.x Range n
Lactate (gravimetric) 0.93 -0.08 0.993 0.47 0.3 to 17.5 107
Linearity was also established versus the i-STAT analyzer using whole blood samples that had been
spiked with lactic acid to cover the measurement range.
Correlation
Slope Intercept Correlation
Coefcient
Sy.x Range n
Lactate (vs i-STAT) 1.00 0.00 0.978 0.67 1.06 to 16.91 405
Direct linearity for the OPTI CCA-TS2 measurement has been established against reference materials or
methods. The linearity of the Lactate sensor on the OPTI CCA-TS2 has been established versus the same
sensor on the OPTI CCA-TS using whole blood samples tonometered with mid level mixtures and spiked
or diluted to establish the correlation.
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