In order to prevent pulmonary emboli, a filter may be placed into which of the following vessels to prevent clots from being carried into the pulmonary circulation?
a. Subclavian vein
b. Pulmonary artery
c. Thoracic duct
d. Inferior vena cava
e. Femoral artery
D
An inferior vena cava vein filter may be surgically placed in the inferior vena cava to prevent clots from being carried into the pulmonary circulation. The effectiveness and safety of these filters are not well established and, in general, they are only recommended in some high-risk patients. Edema distal to the filters is a complicating factor.
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