Four pregnant women with antithrombin III congenital deficiency underwent thrombosis
prophylaxis including oral antico–agulants administered from the 16–18th week to the
36–37th week of pregnancy, subcutaneous heparin before the 16–18th week and after
the 36–37th week, and a single infusion of AT III concentrate in the peripartum period
in order to obtain a minimal level of 0.8 U/ml of AT III functional activity. The
level of circulating AT III after the concentrate infusion needs to be evaluated by
functional methods, because of a consistent amount in the concentrates of inactive
AT III immunoreactive material. No thrombotic or haemorrhagic complication occurred
after starting prophylaxis in any woman either in any newborn.
Keywords
AT III congenital deficiency - Pregnancy - Thrombosis prophylaxis - Heparin - Oral
anticoagulants - AT III concentrate