Platelet activation in patients on CPB and in ex vivo stored unfractionated heparin-anticoagulated blood.

CPB = cardiopulmonary bypass, ADP, TRAP, Ristocetin = platelet activators, see text. Values represent area under the curve in arbitrarily units (U) given as mean ± standard deviation. CI = 95% confidence interval. P values relate to the difference between samples taken from the patient or from the ex-vivo stored blood at the corresponding time points.