Vena Tech vena cava filter: experience and early follow-up.

Vena caval filters, such as the Vena Tech filter, that employ low-profile introducer systems have provided physicians with a variety of options for percutaneous placement. From April 1989 to April 1990, 81 patients underwent percutaneous placement of the Vena Tech filter at the authors' institution. Follow-up has been obtained to evaluate the filter with regard to the prevention of pulmonary embolism, the maintenance of caval patency, and mechanical stability. Two cases of pulmonary embolism have been seen following filter placement. Three cases of caval thrombosis have occurred, with recanalization of the cava seen in two of these cases. There have been one broken filter and one case of incomplete filter opening. Limited filter tilting and migration have occurred, though in no case has filter tilt or migration been clinically significant. This experience with the Vena Tech filter suggests that it is safe and effective for the prevention of pulmonary embolism.