Retrieval of a malpositioned vena cava filter with embolic protection with use of a second filter.

Proper positioning of inferior vena cava (IVC) filters is necessary for effective protection from pulmonary embolism (PE). This report describes a case of an IVC filter malpositioned partially in the right common iliac vein that resulted in risk of recurrent PE caused by thrombus emanating from the left common iliac vein. A new filter was placed in the IVC above the first device, followed by retrieval of the malpositioned filter through the new filter.