• Revue médicale suisse · Oct 2014

    [Age-adjusted D-dimers and pulmonary embolism].

    • G Ongaro, M Righini, A Perrier, and C Marti.
    • Rev Med Suisse. 2014 Oct 15;10(446):1908, 1910-2.

    AbstractPlasma D-dimer measurement is the first diagnostic test performed in patients with a non-high or an unlikely clinical probability of pulmonary embolism (PE) but its clinical usefulness is limited in elderly patients due to a low specificity in this subgroup. PE can be excluded based on D-dimers and clinical probability only in about 5% of patients over 80 years when using the conventional cut-off. Age-adjusted D-dimer cut-off (adjusted cut-off value = age x 10 in patients over 50) increases the specificity of the test without significantly reducing its sensitivity. Using the age-adjusted D-dimer cut-off markedly reduces the need for further diagnostic studies such as computed tomography pulmonary angiography (CTPA). The age-adjusted cut-off has been widely validated in retrospective cohorts, and more recently in a prospective management study.

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