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  • Title: Prevention of postoperative deep vein thrombosis by one daily injection of low molecular weight heparin and dihydroergotamine.
    Author: Baumgartner A, Jacot N, Moser G, Krähenbühl B.
    Journal: Vasa; 1989; 18(2):152-6. PubMed ID: 2545054.
    Abstract:
    201 patients aged over 40 years undergoing abdominal surgery were divided randomly into two groups. Each patient received two subcutaneous injections daily: the first group received a morning injection of 1500 aPTT U of low molecular weight heparin combined with 0.5 mg dihydroergotamine (LMH/DHE) and an evening injection of placebo; the second group received morning and evening injections of 2500 IU standard heparin combined with 0.5 mg dihydroergotamine(H/DHE). 25 patients were withdrawn during the course of the trial, 13 in the LMH/DHE group and 12 in the H/DHE group. There was no significant difference between the two groups with regard to age, sex, body weight or history of thromboembolism. 125I-labelled fibrinogen test was routinely used to detect deep vein thrombosis (DVT), which was confirmed by phlebography. Ventilation-perfusion scanning was performed in patients in whom pulmonary embolism was suspected on clinical grounds. DVT occurred in 6 patients in the LMH/DHE group (6.9%) and in 7 patients in the H/DHE group (7.9%). Pulmonary embolism occurred in one patient in each group. The only noteworthy haemorrhagic incident was a haematoma of the abdominal wall in one patient (LMH/DHE). It was concluded that a single daily injection of 1500 aPTT U low molecular weight heparin combined with DHE is as effective and as well tolerated as two injections daily of 2500 IU standard heparin combined with DHE.
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