| http://www.w3.org/ns/prov#value | - ssel to the inferior vena cava, a series of x-rays are taken to see if there are any changes to the inferior vena cava and the flow of blood through the inferior vena cava.Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs, such as the vena cava, and make echoes.
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