It’s not always easy to diagnose DVT in pregnancy
from symptoms alone. Your healthcare provider may recommend a blood test called a D-dimer test. A D-dimer test is used to identify pieces of blood clot that have broken off into your bloodstream. An ultrasound will also be carried out to confirm DVT, because blood clot fragments can increase during pregnancy. A Doppler ultrasound
, which is a type of scan that can determine how fast the blood is flowing through a blood vessel, can help healthcare providers establish whether blood flow is slowed or blocked. Slowed or blocked blood flow can be a sign of a blood clot. If a D-dimer test and ultrasound cannot confirm a DVT diagnosis, your healthcare provider may use a venogram
or magnetic resonance imaging (MRI). A venogram involves injecting a liquid called a contrast dye into a vein in your foot. The dye moves up the leg and can be picked up by X-ray, which pinpoints a gap in the blood vessel where the blood flow is stopped by a clot.