Characterization and risk factors of inferior vena cava thrombosis in situ detected by computed tomography venography following filter placement: A single-center retrospective cohort study.

13 The findings suggested a decreasing trend in the incidence of filter related IVCT with prolonged dwell time, which were also in line with our previous study. 11 Hence, CTV was performed within 1 month after placement of VCF chosen as a data point to capture a critical period for potential thrombosis while minimizing the impact of potential other confounders, such as intimal hyperplasia.

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Although prior studies regarding filter-related thrombosis illustrated that the rheumatic diseases of immune system were associated with a 14-fold increased risk of IVCF thrombosis, 11 it did not reach statistical significance after analysis, implying that it may not be an independent risk factor for IVCT in situ.

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