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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Bioavailability of subcutaneous low-molecular-weight heparin to patients on vasopressors.

Venous thromboembolism is a frequent complication in patients admitted to intensive care units (ICU), despite prophylactic treatment with subcutaneous low-molecular-weight (LMW) heparin. We postulated that poor efficacy of subcutaneous heparin might be due to administration of vasopressors, which could cause impaired peripheral circulation and inadequate systemic bioavailability of the anticoagulant. We compared concentrations of factor Xa activity in three groups of 15 patients: individuals in ICU who had and had not received vasopressors, and general surgery patients. Those who received vasopressors had lower plasma concentrations of factor-Xa activity than patients in ICU not on vasopressors and postoperative controls. Patients in ICU who take vasopressors could need higher doses of LMW heparin, or a different mode of administration of the drug, to attain adequate thrombosis prophylaxis.[1]

References

  1. Bioavailability of subcutaneous low-molecular-weight heparin to patients on vasopressors. Dörffler-Melly, J., de Jonge, E., Pont, A.C., Meijers, J., Vroom, M.B., Büller, H.R., Levi, M. Lancet (2002) [Pubmed]
 
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