PLATELET AGGREGATION IN DONORS OF PLATELET MASS AND FRESH FROZEN PLASMA

Currently, the most common method in clinical practice, that enables the determination of the functional state of platelets, is the method of platelet aggregation. Objectives. To study the aggregation of platelets in donors of platelet mass and fresh frozen plasma. Material and methods. The study included 31 donors of fresh frozen plasma and platelet mass. The study of platelet aggregation was carried out by the turbidimetric measurement technique on the AP2110 analyzer (ZAO «SOLAR», Minsk, Republic of Belarus) with an inductor: ADP (concentrations of 0.3 μg/ml, 0.6 μg/ml, 1.25 μg/ml and 2.5 μg/ml were used), epinephrine (concentrations of 2.5 μM and 5.0 μM were used), collagen (concentration of 2 mg/ml). Results. 33 analysis of platelet aggregation were performed in donors prior to collection of platelet mass and fresh frozen plasma. Only in 10 cases (30.3%) donors had normal platelet aggregation, hypoaggregation was detected in 15 cases (45.5%) and hyperaggregation - in 8 studies (24.2%). Impaired platelet aggregation was detected in all donors who had COVID-19 infection in their anamnesis (in 5 - hypoaggregation, in 4 - hyperaggregation). In donors who didn’t have this infection in their anamnesis, the incidence of platelet aggregation disorders was statistically significantly lower - 63.6% (in 10 - hypoaggregation, in 4 - hyperaggregation), p=0.04. The presence of COVID-19 infection in the donor’s anamnesis is an independent predictor of impaired platelet aggregation (Chi-square=7.24, p=0.007). Conclusions. The study of platelet aggregation must be mandatory before collecting platelet mass in all donors.