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Defibrotide, a new antithrombotic compound without anticoagulant activity, has been tested for prevention of deep venous thrombosis (DVT) in patients undergoing gynecological surgery (mainly hysterectomy). Eighty-nine women (mean age 48.5) were randomly allocated to defibrotide (44 patients) or placebo (45 patients). 800 mg defibrotide was given daily (200 mg intravenously 4 times a day), starting on the day before operation and then for the next 7 days. DVT were detected by the conventional 125I-fibrinogen test. The two groups were homogeneous for known risk factors (age, varicosities, obesity, neoplasia and previous thromboembolic episodes). The results showed a statistically significant reduction of DVT incidence in patients on defibrotide, as compared with those on placebo: 4/44 = 9% vs. 13/45 = 28.8% (p less than 0.05). There were no side effects, including hemorrhagic complications. The numbers of units transfused were comparable for the 2 groups. In conclusion, the trial shows that defibrotide is an effective and safe drug for the prevention of DVT in gynecological surgery.
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