A design modification to minimize tilting of an inferior vena cava filter does not deliver a clinical benefit

Journal of Vascular Surgery
Chinmaya ShelgikarLarry W Kraiss

Abstract

In July 2007, our group began to use a modified conical inferior vena cava filter with additional stabilizing struts designed to reduce tilting of retrievable filters. We analyzed our experience with this modified filter (Cook Medical, Bloomington, Ind) from July 1, 2007 to December 31, 2008 and compared it to our experience with the standard filter (Günther Tulip, Cook Medical, Bloomington, Ind) from January 1, 2006 through December 31, 2008 to determine if adoption of the modified filter reduced tilting and delivered a discernible clinical benefit. The primary outcome measure was tilt angle after deployment. Secondary outcomes were change in tilt angle between deployment and retrieval (self-centering) and retrieval failure due to inability to engage the filter hook. Measurements were retrospectively determined using the anteroposterior venogram at the time of placement and removal. Tilt angle was defined by the center line of the filter relative to the center line of the inferior vena cava (IVC). Statistical significance was assumed for P ≤ .05. During the study period, a total of 302 IVC filters were placed. Retrieval was attempted for 85 of 194 (44%) standard filters and 52 of 108 (48%) modified filters. The overall differe...Continue Reading

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Citations

Oct 11, 2012·Radiology·Lu Anne V DinglasanS William Stavropoulos
Dec 20, 2011·Journal of Vascular Surgery·E Marty KnottWilliam R Fry
Jul 9, 2013·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·E D AvgerinosR A Chaer
Jan 3, 2013·Expert Review of Medical Devices·Austin Dixon, S William Stavropoulos
Jun 11, 2021·Seminars in Interventional Radiology·Xin LiSasan Partovi

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