PURPOSE Currently, data surrounding predicting difficulty of IVC filter retrievals are heterogenous and conflicting. We aimed to identify which of many variables associated with IVC filters is a risk for procedural difficulty. MATERIALS AND METHODS This study retrospectively reviewed 6 years of IVC filter retrievals at a tertiary center identifying 356 consecutive retrievals. A difficult retrieval was defined as any case where the fluoroscopy time exceeded 7 min, an advanced technique was required, the retrieval attempt failed and required an additional attempt or was left permanent, or there was major complication such as IVC filter fracture/migration/vessel injury. RESULTS There were 105 filter retrievals defined as difficult (29.5%). Univariate analysis showed significantly increased risk for retrievals with an embedded top. Multivariate analysis assessed the association between dwell time, tilt, age, non-hooked filters, leg penetration and difficult retrieval. This showed a significant increase in the difficulty of retrieval for filters tilted between 5° and 15° (odds ratio 2.38, p < 0.001), for filters tilted more than 15° (odds ratio 7.91, p < 0.001), and dwell time greater than 6 months (odds ratio 2.06, p = 0.033). No significant increase in difficulty was seen with filters with a dwell time of less than 6 months, leg penetration, non-hooked filters, or with increasing patient age. CONCLUSIONS Identifying these risks in patients in advance of the procedure allows appropriate planning and improved workflow efficiency.

中文翻译：

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与难以去除下腔静脉滤器相关的术前危险因素的分层：第三级中心的6年回顾性分析。

目的当前，围绕IVC过滤器检索的预测难度的数据是异类的并且相互冲突。我们旨在确定与IVC过滤器相关联的许多变量中的哪一个是程序困难的风险。材料与方法这项研究回顾性地回顾了第三级IVC过滤器检索6年，确定了356个连续检索。检索困难定义为荧光检查时间超过7分钟，需要先进技术，检索尝试失败且需要再次尝试或永久保留，或存在重大并发症（如IVC滤器破裂/迁移/血管）的情况受伤。结果有105个过滤器检索被定义为困难（29.5％）。单变量分析显示，嵌入顶部的检索风险显着增加。多变量分析评估了停留时间，倾斜度，年龄，无钩状过滤器，腿部穿透和难以取回之间的关联。这表明，倾斜度在5°和15°之间的滤光片（奇数比2.38，p <0.001），倾斜度超过15°（滤光比7.91，p <0.001）和滞留时间更长的滤清器检索难度显着增加。超过6个月（赔率2.06，p = 0.033）。停留时间少于6个月的过滤器，腿部穿透，未钩住的过滤器或患者年龄的增加，难度没有显着增加。结论在手术前确定患者的这些风险可以进行适当的计划并提高工作流程的效率。这表明，倾斜度在5°和15°之间的滤光片（奇数比2.38，p <0.001），倾斜度超过15°（滤光比7.91，p <0.001）和滞留时间更长的滤清器检索难度显着增加。超过6个月（赔率2.06，p = 0.033）。停留时间少于6个月的过滤器，腿部穿透，未钩住的过滤器或患者年龄的增加，难度没有显着增加。结论在手术前确定患者的这些风险可以进行适当的计划并提高工作流程的效率。这表明，倾斜度在5°和15°之间的滤光片（奇数比2.38，p <0.001），倾斜度超过15°（滤光比7.91，p <0.001）和滞留时间更长的滤清器检索难度显着增加。超过6个月（赔率2.06，p = 0.033）。停留时间少于6个月的过滤器，腿部穿透，未钩住的过滤器或患者年龄的增加，难度没有显着增加。结论在手术前确定患者的这些风险可以进行适当的计划并提高工作流程的效率。停留时间少于6个月的过滤器，腿部穿透，未钩住的过滤器或患者年龄的增加，难度没有显着增加。结论在手术前确定患者的这些风险可以进行适当的计划并提高工作流程的效率。停留时间少于6个月的过滤器，腿部穿透，未钩住的过滤器或患者年龄的增加，难度没有显着增加。结论在手术前确定患者的这些风险可以进行适当的计划并提高工作流程的效率。