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The ACE system (Figure 1) is fully automated. An internal computer directs all system
functions including test requisitioning, analyzer operation, data acquisition, data processing,
report generation and fault monitoring.
Definitions for a wide variety of manufacturer-validated tests are included with the system
and, for added flexibility, definitions for additional tests can be entered by individual
laboratories. Up to 200 different test definitions can be maintained on the system at one
time.
System throughput is up to 165 tests per hour. STAT requests take priority over the routine
tests and may be entered at any time. Depending on the test requested, STAT tests are
completed within minutes.
Up to 40 different reagents can be used on the system at one time. The reagents are
maintained on the system at 12 º ± 2 ºC to maximize their on-system stability and on screen
system temperature reads 8 º ± 1 ºC in temperature monitor. They can be loaded anywhere
on the reagent tray, since each reagent container is positively identified by means of a
computer coded label. The liquid level of each reagent is measured when the reagent is used
and the operator is notified when a reagent is depleted.
Samples are introduced into the system directly from primary tubes or from sample cups
filled by the operator. An optional on-system barcode reader allows positive identification of
barcoded primary tubes, while sample cups are identified by means of a worklist prepared by
the operator. The liquid level in each sample container is measured when the sample is
aspirated, and the operator is notified when there is insufficient sample for analysis. Finally,
the time each sample remains on the system is monitored and, for quality assurance
purposes, a sample is not used after it has been on the system for more than two hours.