Bayer HealthCare Rapidlab 800 - Manual (Page 562)

EĆ36 800 Series Operator's Manual
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, chloride glucose and lactate
analysis. Multiple runs were made using these samples on four 860 systems, except
for lactate. For lactate, multiple runs were made on six 860 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 860 system for analysis. Multiple runs were
made using five levels of expired gas on four 860 systems. The protocol called for
three replicates of each level in each run.
Table E-31 through Table E-44 summarize the results of the 860 system whole
blood, expired gas, and electrolyte recovery and precision testing.
Table EĆ31.āă860 Recovery and Precision TestingĊpH
Level Mode n WRSD * Observed Expected Recovery
7.21 Syringe 48 0.002 7.213 7.214 100.0
Capillary 48 0.004 7.202 7.202 100.0
Microcapillary 48 0.003 7.205 7.205 100.0
Microsyringe 48 0.002 7.204 7.205 100.0
pH/Lyte 48 0.003 7.207 7.208 100.0
7.37 Syringe 48 0.002 7.373 7.369 100.1
Capillary 44 0.002 7.376 7.375 100.0
Microcapillary 48 0.006 7.376 7.376 100.0
Microsyringe 48 0.002 7.371 7.370 100.0
pH/Lyte 48 0.002 7.361 7.363 100.0
7.52 Syringe 48 0.003 7.544 7.546 100.0
(Continued)