Deep vein thrombosis diagnosis algorithm

Editors-in-Chief: C. Michael Gibson, M.S., M.D. Associate Editor-In-Chief: Ujjwal Rastogi, MBBS [mailto:urastogi@perfuse.org]

Considerations

 * Positive predictive value for compression ultrasonography is 94 percent (95% CI)
 * Venography is used only
 * when noninvasive testing is not clinically feasible
 * The results are equivocal
 * A negative D-dimer assay, as a stand-alone test may be insufficient to rule out DVT, especially in patient with a high venous thromboembolism prevalence.