Abstract
Antithrombin (AT) replacement has been described in patients with hereditary AT deficiency undergoing delivery; however, the kinetics of AT replacement in preeclampsia is not adequately understood. Therefore, the Prospective Randomized Evaluation of the Safety and Efficacy of Recombinant Antithrombin in Very Preterm Preeclampsia (PRESERVE-1) study has been proposed. Sixty women aged≥18 years at 24 0/7-28 0/7 weeks' gestation and with hypertension and proteinuria will be enrolled and randomly assigned to receive recombinant human AT or placebo until fetal and/or maternal indications cause cessation of expectant management or until 34 0/7 weeks' gestation. The primary endpoint is the increase in gestational age from randomization to delivery. Safety assessments and laboratory assays will also be performed. PRESERVE-1 study enrollment will begin during the second half of 2013. The PRESERVE-1 study will provide further insight into the pharmacokinetic activity and safety of AT therapy in preeclampsia.
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