Abstract 14256: Examining the Efficacy of Inferior Vena Cava Filters in the Direct Oral Anticoagulant Era
Toru Takase, Yohei Funauchi, Yugo Yamashita, Kazuhisa Kaneda, Ryuki Chatani, Yuji Nishimoto, Nobutaka Ikeda, Yohei Kobayashi, Satoshi Ikeda, Kitae Kim, Shuhei Tsuji, Maki Oi, Takuma Takada, Kazunori Otsui, Jiro Sakamoto, Yoshito Ogihara, Ryusuke Nishikawa, Gaku Nakazawa- Physiology (medical)
- Cardiology and Cardiovascular Medicine
Introduction: No previous reports have adequately demonstrated whether inferior vena cava filters prevent pulmonary embolism, and reports of disadvantages, such as worsening venous thrombosis, have led to a decrease in the frequency of their use. However, in actual clinical practice, patients often encounter situations in which they expect to benefit from inferior vena cava filters; hence, exploratory studies examining their efficacy continue.
Hypothesis & Methods: We analyzed data from the COMMAND VTE Registry-2, a multi center, retrospective, observational study of symptomatic venous thrombosis in the DOAC era, for cases using inferior vena cava filters.
Results: A total of 5197 cases of venous thrombosis were enrolled, among whom 483 (9%) had inferior vena cava filters implanted. The inferior vena cava filter was implanted long-term and removed in 6% and 3% of cases, respectively. Inferior vena cava filters tended to be implanted in patients with active cancer patients, with more patients with terminal cancer, on anticancer therapy, and with distant metastases having long-term filter implantation (P = 0.001). After inferior vena cava filter implantation, the inferior vena cava filter implantation group showed a significantly lower incidence of pulmonary embolism within 30 days after the onset of initial venous thrombosis (P = 0.011). However, Kaplan-Meier analysis during a median follow-up of 854 days showed that long-term implantation of inferior vena cava filters significantly increased incidence of deep vein thrombosis (P = 0.001), whereas multivariate analysis found that long-term implantation of inferior vena cava filters was an independent risk factor for deep vein thrombosis (HR: 2.096, 95% CI: 1.254-3.508, P = 0.005).
Conclusions: Inferior vena cava filters may be effective in preventing pulmonary emboli in the short term; however, even in the DOAC era, long-term filter implantations were associated with an increased incidence of deep vein thrombosis.