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  • Title: Treatment of deep venous thrombosis with low-molecular-weight heparin during pregnancy.
    Author: Ulander VM, Stenqvist P, Kaaja R.
    Journal: Thromb Res; 2002 Apr 01; 106(1):13-7. PubMed ID: 12165283.
    Abstract:
    Low-molecular-weight (LMW) heparins have been shown to be at least as effective as unfractionated (UF) heparin in the treatment of deep venous thrombosis (DVT) in nonpregnant subjects. LMW heparins have been shown to be safe when used during pregnancy as they do not cross the placenta. Up to now, they have been used mainly in thromboprophylaxis during pregnancy and rarely in the treatment of acute DVT in pregnant women. In a prospective observational study, we compared the effectiveness and safety of the LMW heparin, dalteparin, with UF heparin in the initial treatment (first week) of DVT during pregnancy. After confirmation of DVT by ultrasonography, 10 women were treated with UF heparin (25,430 IU/day, mean) and 21 women with dalteparin (16,000 IU/day, mean) for 7 days and, thereafter, all women were given treatment doses of LMW heparin for another 2 weeks. The dose was then gradually decreased and kept at a high prophylactic dose until delivery. One patient in the dalteparin group had recurrence of DVT 2 weeks after starting the treatment. No differences were observed between the groups in symptoms or bleeding complications during pregnancy and delivery. Our results indicate that LMW heparin is as effective and safe as UF heparin for the first week of treatment, but LMW heparin has the advantage of being easily administered and few laboratory controls are required.
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