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Evaluation of the Ciba Corning 840 blood gas analyzer
R J Wong1, J J Mahoney, A L Van Kessel
1Stanford University Hospital, CA, USA.
Background:
Because our laboratory had used the Ciba Corning 200 series blood-gas analyzers for a number of years, we were asked to participate in the evaluation of a premarket unit of the Model 840 analyzer (C840). DESCRIPTION OF DEVICE: The C840 is a bench-top instrument that combines a menu-driven user interface with an automated sampler and integrates software for data management and system diagnostics.
Evaluation Methods:
We compared the performance of the C840 to a laboratory-based Ciba Corning 278 (C278), analyzing a total of 325 blood samples. We also evaluated the software for routine laboratory applications.
Evaluation Results:
The bias and imprecision (+/- 2 SD) between the C840 and C278 was calculated for pH (+0.004 +/- 0.014 pH units), PCO2 (+1.8 +/- 3.3 torr), and PO2 (+0.01 +/- 9.0 torr for all PO2 ranges; -0.17 +/- 4.8 torr for PO2 < 150 torr).
Conclusions:
We conclude that the analytical performance of the C840 is comparable to the C278, and its data storage and interface capabilities should help laboratories meet CLIA-88 requirements.