A member asked:

56 yo male, dmt1, pvd, htn. >3cm swelling below tibial tuberosity. us to r/o dvt = neg. i wanted d-dimer lab but doc said no. is d-dimer good idea?

2 doctors weighed in across 2 answers

Not necessarily: The gold standard for DVT is a venogram. If the suspicion or DVT is high I would do a venogram. If the suspicion is low d-dimer might help to confirm no assert the negative results in the US

Answered 11/14/2017

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Dr. Stephen Southard answered

Specializes in Internal Medicine

Not necessarily: If the ultrasound was technically proficient than it's unlikely that a clot caused the swelling. By the way, what did the ultrasound characterize the swelling as. Also, if the swelling is truly on the front(anterior) side as seem to be suggested as above, then it's unlikely a clot as those issue tend to present more so on the "back" side of the leg.

Answered 8/7/2014

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