Abstract
Optional vena cava (VC) filters are filtration devices that can be placed percutaneously into the inferior VC (IVC) to provide protection from pulmonary embolism (PE). These devices can be either removed (retrievable filters) or altered in some way to no longer function as a filter while remaining in the IVC (convertible filters), although the latter are not yet commercially available. The retrieval of a filter is accomplished during a second percutaneous procedure through either a jugular or femoral venous access, using a snaring or other retrieval device.
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