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Tytuł oryginału: Effect of hydroxyethyl starch (HAES) on degree and kinetics of erythrocyte aggregation studied with dielectric spectroscopy method.
Autorzy: Jaroszyński Witold, Keslinka Elżbieta, Wujtewicz Maria, Suchorzewska Janina, Kwiatkowski Bartłomiej
Źródło: Med. Sci. Monitor 2002: 8 (7) s.BR272-BR278, il., tab., bibliogr. 20 poz.
Sygnatura GBL: 313,278

Hasła klasyfikacyjne GBL:
  • farmacja
  • hematologia

    Typ dokumentu:
  • praca doświadczalna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • in vitro

    Streszczenie angielskie: Background: Colloidal fluids, e.g. hydroxyethyl strach (HAES), used as blood plasma substituted during acute controlled normovolemic hemodilution may cause erythrocyte aggregation. The aim of the presented study was to assess the degree and rate of erythrocyte aggregation in the media containing different concentrations of HAES. Material/Methods: The experiments were carried out on hpearinized venous blood and on erythrocyte suspension in 0.9 p.c. NaCl. Results: Uncer stationary conditions, an increase of blood and erythrocyte suspension relative electric permitivity (î), with an increase of HAES concentration in the sample, was observed after HAES supplementation. Sample flow through a measuring chamber resulted in decrease of the îL value (determined for 100 kHz). Stopping the flow led to non-linear increase of îL values in the function of time, where two components - characterized by rapid and slow variability, respectively, could be distinguished. The increase was characterized by ç1 and ç2 relaxation times, which can be related respectively to the process of erythrocyte rouleaux formation and to the formation of 3-D network aggregates. Conclusions: 1) The values of çL are differentiated by the degree of erythrocyte aggregation due to the presence of HAES, both in whole blood and in erythrocyte suspension in 0.9 p.c. NaCl solution, 2) The degree of erythrocyte disaggregation due to flow increases with the increase of flow intensity and correlates with decreasing çL value, 3) ç1 and ç2, which characterize the kinetics of erythrocyte aggregation, indicate a difference between aggregation processes taking place in whole blood and after hemodilution with HAES.

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