Bayer HealthCare Rapidlab 800 - Manual (Page 545)

Performance Characteristics EĆ19
Parameter TotSD [ WRSD * Mean n Level
pO
2
1 44 25.8 1.39 1.97
4 44 237.7 2.99 5.78
Na + 1 44 102.4 0.34 1.31
4 44 167.2 0.48 1.43
K + 1 44 2.04 0.059 0.073
4 44 16.87 0.170 0.235
Cl – 1 44 132.1 0.95 1.22
4 44 75.9 0.47 0.52
Ca ++ 1 44 2.82 0.035 0.056
4 44 0.55 0.009 0.017
* WRSD = within-run standard deviation
[
TotSD = total standard deviation
Recovery and Precision with Whole Blood and Expired
Gases
For testing syringe, capillary, microsyringe, and microcapillary modes, blood was
collected in heparinized vacuum tubes. It was tonometered at 37.0
_C to each of
three levels to prepare samples for pH analysis, and five levels to prepare samples
for pCO
2
and pO
2
analysis. Blood was spiked/diluted to each of three levels to
prepare samples for sodium, potassium, calcium, and chloride analysis. Multiple
runs were made using these samples on four 850 systems. The experimental
protocol called for three replicates of each level in each run.
For testing the expired gas mode, 10 mL of tonometry gas were drawn into a
12 mL syringe and aspirated into the 850 system for analysis. Multiple runs were
made using five levels of expired gas on four 850 instruments. The experimental
protocol called for three replicates of each level in each run.