Light transmittance aggregometry is the historical reference method for platelet function
testing and continues to be used extensively. Whole blood impedance lumiaggregometry
represents an updated methodology that provides for simplified specimen management,
an assay milieu that replicates in vivo platelet activation conditions, improved reproducibility,
and near-patient testing. While the impedance-based whole blood aggregometer with
luminescence channel is becoming the standard for platelet function testing using
this methodology, at least three near-patient whole blood instruments are available,
each employing its unique technology. We provide descriptions of whole blood lumiaggregometry
and three near-patient systems. We include the principle of operation, materials,
and stepwise example protocols and speculate on the importance of concordance among
the platforms.
