title: [Biochemical changes in thrombocyte concentrates stored for 5 days].
abstract: The purpose was to evaluate biochemical and functional changes in platelet concentrates prepared from buffy-coat (PC-BC), stored up to five days at temperature of 20 +/- 2 degrees C. Forty-two PC-BC units from random blood donors were examined. In order to determine the biochemical changes we studied the release of lactate dehidrogenase (LDH), changes in pH value, pCO2, pO2, glucose and lactate concentrations. In addition, the aggregation of platelets with adenosine diphosphate (ADP), and hypotonic shock response were examined. The concentration of LDH markedly increased from 138.8 IU/l (day 1st) up to 234 IU/l (day 5th). The lactate concentration increased significantly (p < 0.001) from 2.1 to 8.6 mmol/l, and consequently pH decrease was observed (from 7.31 to 7.13). The level of glucose decreased gradually from 22.8 to 19.4 mmol/l. The pCO2 decreased progressively from 36.8 mmHg to 24 mmHg during first two days of storage and after that gradually to 20 mmHg. In contrast, pO2 fluctuated between 108 and 133 mmHg during five day of storage. Recovery of hypotonic shock response was 70% on day 1st and 35.7% on day 5th, respectively (p < 0.001). Platelet aggregation using ADP showed significant increase from 6.6 sec (day 1st), to 11.2 sec (day 4th) and 14.6 sec (day 5th), too. Significant differences in biochemical parameters and platelet functions, with confirmed relationship between changes obtained during five days stored PC-BC did not affect the efficacy of applied platelets.
authors.forename: D
authors.initials: D
authors.lastname: Vucetić
authors.forename: B
authors.initials: B
authors.lastname: Balint
authors.forename: J
authors.initials: J
authors.lastname: Taseski
authors.forename: S
authors.initials: S
authors.lastname: Mandić-Radić
authors.forename: V
authors.initials: V
authors.lastname: Regović
mesh_terms: D001792:Blood Platelets / Q000378:metabolism*; D001793:Blood Preservation; D006801:Humans; D017713:Platelet Transfusion; D013997:Time Factors
vernacular_title: Biohemijske promene u jedinicama koncentrovanih trombocita skladistenih pet dana.