ACT Signature + results
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I have old Signature Plus instruments in EPS. Recently, they are complaining that when running 2 instruments side by side, they are finding a 15-20% difference between the two machines. What is your experience with differences between two different SIgnature + machines using the same cuvettes.
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I would say that is entirely reasonable. It's a crude test at best, on a sample that is essentially dynamic and in a constant state of flux/instability (as it moves toward clotting in its collection container) as the seconds/minutes tick by. I only expect a +/- 15% correlation when I am comparing SigElites to each other. Add in variables like, is it the same sample being tested, are they not necessarily testing them simultaneously, and all bets are off...
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