Which laboratory test is considered to have a reliable negative predictive value in the diagnosis of DVT?

Question

Quizplus · Accepted Answer

D-dimer is a laboratory test that has a reliable negative predictive value in the diagnosis of deep vein thrombosis (DVT). A negative D-dimer result can effectively exclude the diagnosis of DVT in low-risk patients, thereby avoiding the need for more invasive testing. However, a positive D-dimer result is not specific for DVT and can be elevated in a variety of other conditions, such as recent surgery or trauma, cancer, or pregnancy. Therefore, a positive D-dimer result should be followed up by additional testing to confirm or exclude the diagnosis of DVT. Factor VLeiden, PT, and tPA are not primarily used for the diagnosis of DVT.

Which Laboratory Test Is Considered to Have a Reliable Negative