Evaluation of the Effect of Dextran Sulphate on Anti-Xa Activities Measured

"The measurement of anti-Xa activities will be carried out on frozen-defrosted plasma citrate and CTAD with 4 reagents~* STA-Liquid anti-Xa (STAGO) (not containing dextran)~* Biophen Heparin LRT (Hyphen) (reactive containing dextran)~* Berichrom (Siemens) with dextran~* Berichrom (Siemens) without dextran~The dosage of platelet factor 4 and of the beta-TG will be carried out on frozen-defrosted plasma with the asserachrom PF4 and Asserachrom beta-TG (Diagnostica Stago) kits."