laboratory diagnostic - coagulation - Factor IX, antibodies screening, citrated plasma 2ml. The plasma must be frozen within 1 hour after collection and must be sent in the frozen samples container. ALWAYS specify the Factor IX level. This analysis can only be performed if the factor IX level is lowered. Attach the clinical data relating to the patient (major inflammatory syndrome, pregnancy, etc.) and the circumstances (bleeding, thrombosis, preoperative evaluation, etc.), Chronometric, ssso, todylaboratories®, bmn, code L16LD1549