Plasma D-dimers in the diagnosis of venous thromboembolism

被引:208
作者
Kelly, J [1 ]
Rudd, A [1 ]
Lewis, RR [1 ]
Hunt, BJ [1 ]
机构
[1] St Thomas Hosp, Alexandra Ward, Dept Care Elderly, London SE1 7EH, England
关键词
D O I
10.1001/archinte.162.7.747
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Clinical suspicion for venous thromboembolism (VTE) mandates objective testing to confirm or exclude the diagnosis. However, current imaging modalities are imperfect because of a small but important risk of complications with invasive techniques or limited sensitivity with noninvasive ones. A diagnostic tool for WE is needed that is noninvasive and highly accurate, allowing immediate treatment decisions to be made in most cases. Plasma D-dimers (D-ds), specific cross-linked fibrin derivatives, partially fulfill these criteria in that they are sensitive markers for thrombosis but lack specificity. They therefore cannot be used to make a positive diagnosis of VTE; however, they generally have high negative predictive value and are useful as an exclusionary test, a potentially important role given that VTE is eventually ruled out in most patients investigated. Clinical management studies are clarifying the role of D-ds in the diagnostic paradigm of VTE: negative ultrasound and D-d findings obviate the need for serial imaging in suspected deep vein thrombosis, and anticoagulant therapy can be safely withheld in patients with non-high clinical suspicion for pulmonary embolism and non-high probability ventilation perfusion scan if D-d test results are negative. More recently, the combination of a negative SimpliRED (AGEN Biomedical Ltd, Brisbane, Australia) D-d result and low clinical suspicion derived using a formal scoring system has been shown to exclude deep vein thrombosis and pulmonary embolism and to obviate the need for imaging. Several different D-d assays are now available, and clinicians should be aware of the performance characteristics of the test used before incorporation into diagnostic algorithms as these will differ between assays, and the results of clinical management studies cannot necessarily be safely extrapolated to assays other than those specifically evaluated. If alternative assays are to be substituted, these should consistently have been shown to possess equivalent or greater sensitivity.
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页码:747 / 756
页数:10
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