title: Histology of tissue adherent to OptEase inferior vena cava filters regarding indwelling time.
abstract: The purpose of this paper is to report on the histology of tissues found on retrieved filters with regard to indwelling time. Between February 2006 and January 2007, 28 Optease inferior vena cava filters (Cordis Europa, Roden, The Netherlands) were retrieved from 27 patients. Twenty-two filters were inserted prophylactically for trauma patients and six for patients with venous thromboembolism. Cavography was performed both before and after filter removal to evaluate the presence of thrombi or wall damage. Filters were retrieved with the snare and sheath method. All material adherents to the filters were examined histologically.The mean indwelling time of the filters was 24.9 days (range, 6-69 days). Red tissue fragments were seen on all the filters, consistent microscopically with clots and fibrin. On five filters (18%; mean indwelling time, 45.4 days) white tissue consistent with vascular intima was found. All postprocedure cavographies were normal. We conclude that most material adherent to the retrieved filters is thrombi, while vascular intima can be found in the minority of filters with a longer indwelling time.
authors.affiliation: Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel. rimonu@sheba.health.gov.il
authors.forename: Uri
authors.initials: U
authors.lastname: Rimon
authors.forename: Alexander
authors.initials: A
authors.lastname: Volkov
authors.forename: Alexander
authors.initials: A
authors.lastname: Garniek
authors.forename: Gil
authors.initials: G
authors.lastname: Golan
authors.forename: Paul
authors.initials: P
authors.lastname: Bensaid
authors.forename: Boris
authors.initials: B
authors.lastname: Khaitovich
authors.forename: Kamel
authors.initials: K
authors.lastname: Abu-Salah
authors.forename: Rivka
authors.initials: R
authors.lastname: Zissin
authors.forename: Daniel
authors.initials: D
authors.lastname: Simon
authors.forename: Eli
authors.initials: E
authors.lastname: Konen
mesh_terms: D000293:Adolescent; D000328:Adult; D016009:Chi-Square Distribution; D020878:Device Removal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013923:Thromboembolism / Q000473:pathology*; D013997:Time Factors; D017539:Tunica Intima / Q000473:pathology*; D016306:Vena Cava Filters