JOURNAL ARTICLE

The safety of dosing dalteparin based on actual body weight for the treatment of acute venous thromboembolism in obese patients

E Al-Yaseen, P S Wells, J Anderson, J Martin, M J Kovacs
Journal of Thrombosis and Haemostasis: JTH 2005, 3 (1): 100-2
15634272
Data evaluating the safety of using weight-based low-molecular-weight heparin in the treatment of obese patients with acute venous thromboembolism are limited. The product monograph of dalteparin suggests the maximum dose should be limited to 18,000 U subcutaneously once daily. There are no specific data regarding the risk of recurrence or bleeding in patients given dalteparin in a weight-based dose of 200 IU kg(-1). We report a retrospective chart review of 193 obese patients who weighed more than 90 kg and who received dalteparin at or near to 200 IU kg(-1) actual body weight for 5-7 days for acute venous thromboembolism with 90 day follow-up information. Of the patients, 77% had idiopathic venous thromboembolism, 16% had an underlying malignancy, and 7% had a transient risk factor. Warfarin was initiated within 2 days with a target International Normalized Ratio range of 2.0-3.0. All patients were followed for 12 weeks post diagnosis. Only two patients had a major hemorrhage, 4 and 8 weeks from diagnosis. This study supports the safety of dosing dalteparin based on actual body weight in obese patients.

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