Inferior vena cava filter

Venous filters (also vena cava filters ) are fine self-expandable and self-fixing metal constructions, the blood clot passing through migration from the veins of the lower body in the pulmonary circulation (pulmonary embolism ) and can lead to an acute fatal right heart failure, at ungefährlicherer point lower in the vena cava ( vena cava inferior) field.

Venous filters are usually not a primary technology for the prevention of pulmonary embolism, but useful if, despite adequate pharmacological anticoagulation comes to pulmonary embolism recurrence or when in severe pulmonary embolism, anticoagulation is contraindicated. Venous filters are inferior usually placed in the vena cava below the kidney, rare above this and least often in the superior vena cava. However, they do not provide absolute protection against pulmonary embolism.

There are permanent and removable back ( optional ) filter today. The implantation of Cavafiltern was originally surgically ( Mobin - Uddin filter 1967, Kim -Ray Greenfield filter 1973), later percutaneously without surgery under local anesthesia through a vein the groin or the neck ( Simon Nitinol filter 1977 Bird's nest filter 1980, basket filter, 1985, LGM filter).

Based on the results of PREPIC study ( Decousus et al. 2005), which pointed to the longer-term problems of chronic venous insufficiency in Cavafiltern, the trend has been strengthened to removable filters. After previously a time window of 14 days was assumed the filter removal has proven even after prolonged time as possible. After the first re- removable filter ( Günther Tulip filter 1992) was followed by further as recovery filter, OptEase filter ALN filter and Celect filters. Such filters can be even after a long time from the inferior vena cava without surgery under local anesthesia remove it when they are grown free of major blood clots and not too tight in the Cavawand.