OPTi CCA-TS2 - Page 200

PCO2-2 Operator’s Manual – OPTI CCA-TS2
PCO
2
ANALYTES
Reproducibility
Controls
Within-run precision (S
wr
) and Total Precision (S
T
), were determined from 2 runs per day with 2
replicates per run over a period of 20 days following the CLSI guideline EP5-A2. Typical results for 3
dif
ferent control levels are shown below:
PCO
2
(mmHg) OPTI Check Level 1 OPTI Check Level 2 OPTI Check Level 3
Days Run 20 20 20
Total Average 74.5 45.0 24.8
Within Run St. Dev. (S
wr
) 0.8 0.3 0.3
Within Run % CV 1.1% 0.7% 1.1%
Total Precision St. Dev. (S
T
) 0.9 0.5 0.4
Total % CV 1.3% 1.0% 1.5%
Whole Blood
Within-run precision in whole blood samples was evaluated at 3 different concentrations on the OPTI
CCA-TS2. The table below shows the Averages, Standard Deviations and % CV calculated from 10
samples for each level.
PCO
2
(mmHg) Whole Blood
Level 1 Level 2 Level 3
Average 21.4 46.2 91.6
St. Dev 0.3 0.4 1.7
%CV 1.60% 0.90% 1.82%
n 10 10 10