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  • Title: The Vena Tech filter: evaluation of a new inferior vena cava interruption device.
    Author: Cull DL, Wheeler JR, Gregory RT, Synder SO, Gayle RG, Parent FN.
    Journal: J Cardiovasc Surg (Torino); 1991; 32(5):691-6. PubMed ID: 1939334.
    Abstract:
    Expanded indications for caval interruption and earlier diagnosis of deep venous thrombosis have resulted in increased use of transvenous caval interruption devices and have intensified the search for the ideal caval filter. The Vena Tech vena cava filter is a percutaneous, transvenous caval interruption device which was recently introduced in the United States. We reviewed our experience with this filter. During the period of September 1989 to July 1990, 41 patients underwent placement of the Vena Tech filter. Indications for filter insertion included deep venous thrombosis with a contraindication to anticogulation (61%), pulmonary embolism while on anticoagulant therapy (29%), and prophylaxis (10%). Insertion was accomplished percutaneously in 40 patients (98%) and via cutdown in one patient. Thirty-nine (95%) were placed from the right internal jugular vein and two (5%) from the right femoral vein. There were no deaths related to filter placement. Incomplete opening of the filter occurred in 8 patients (19%); however, the incidence of deployment problems decreased as our experience increased. Pulmonary embolism after filter placement occurred in one patient (2%). Duplex scan was obtained postoperatively in 15 patients (mean follow-up 120 days). The inferior vena cava was patent in all patients, although nonoccluding thrombus was identified in the filter in one patient. We conclude the Vena Tech filter is an effective device for caval interruption, is easily inserted, and is associated with minimal morbidity.
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