Hislop Sean, Fanciullo Dustin, Doyle Adam, Ellis Jennifer, Chandra Ankur, Gillespie David L
Division of Vascular Surgery, University of Rochester, School of Medicine and Dentistry, Rochester, NY.
Division of Vascular Surgery, Heart and Vascular Center, Southcoast Health System, Fall River/New Bedford, Mass.
J Vasc Surg. 2014 Apr;59(4):1066-72. doi: 10.1016/j.jvs.2013.10.071. Epub 2014 Jan 1.
OBJECTIVE: The single puncture intravascular ultrasound (IVUS)-guided bedside placement of inferior vena cava (IVC) filters has been shown to be an effective technique. The major disadvantage of this procedure is a steep learning curve that can lead to an increased risk of filter malposition. In an effort to increase the safety and efficacy of IVUS-guided bedside IVC filter placement, we proposed that preoperative planning could reduce the incidence of IVUS-guided filter malpositions. As a first step, we examined the correlation between preoperative abdominal computed tomography (CT) scan measurements and intraprocedural IVUS derived measurements of vena cava anatomy and its surrounding structures. As a second step, we attempted to determine the safety of this protocol by assessing the incidence of malposition. METHODS: A retrospective review of prospectively collected data was performed on all patients receiving bedside IVUS-guided filters from July 1, 2010 to August 31, 2011. Measurements of the IVC length from the atrial-IVC junction to the midportion of the crossing right renal artery, the lowest renal vein, and iliac vein confluence were obtained prior to IVC filter placement by both CT-based measurement, as well as intraprocedural IVUS pullback lengths. Regression analysis (significant for P < .05) was used to determine the correlation between these imaging modalities. RESULTS: Forty-six patients had adequate CT scans available to perform the analysis and were candidates for bedside IVUS-guided IVC filter placement. All IVUS-guided filters were placed using a single puncture technique with the Cook Celect Filter. This study found there was a close correlation between IVUS and CT derived measurements of the right atrium to right renal artery distance, lowest renal vein distance, and iliac confluence distance. In addition, we found that the IVUS distances from the atrial-IVC junction to the right renal artery and lowest renal vein were statistically similar. Nine patients had 10 vascular anatomic variations, all identified by both IVUS and CT. There were no complications or malpositions of IVC filters using this protocol. CONCLUSIONS: These data suggest that IVUS pullback measurements from the right atrium used in combination with preprocedure CT derived measurements of the distance from the right atrium to the lowest renal vein and iliac vein confluence provide an accurate roadmap for the placement of bedside IVC filters under IVUS guidance. We provide a method for organizing this information in a preplanning document to aid this procedure. We suggest this easily employed technique be more fully utilized to help decrease the incidence of malpositioned filters using single puncture IVUS guidance.
目的:单穿刺血管内超声(IVUS)引导下在床边放置下腔静脉(IVC)滤器已被证明是一种有效的技术。该操作的主要缺点是学习曲线较陡,可能导致滤器位置不当的风险增加。为了提高IVUS引导下床边放置IVC滤器的安全性和有效性,我们提出术前规划可以降低IVUS引导下滤器位置不当的发生率。第一步,我们检查了术前腹部计算机断层扫描(CT)测量值与术中IVUS得出的腔静脉及其周围结构的测量值之间的相关性。第二步,我们试图通过评估位置不当的发生率来确定该方案的安全性。 方法:对2010年7月1日至2011年8月31日期间所有接受床边IVUS引导滤器的患者进行回顾性分析,这些数据是前瞻性收集的。在放置IVC滤器之前,通过基于CT的测量以及术中IVUS回撤长度,获取从心房-IVC交界处到右肾动脉中部、最低肾静脉和髂静脉汇合处的IVC长度测量值。采用回归分析(P <.05具有统计学意义)来确定这些成像方式之间的相关性。 结果:46例患者有足够的CT扫描数据可用于分析,并且是床边IVUS引导下放置IVC滤器的候选者。所有IVUS引导的滤器均采用单穿刺技术使用库克Celect滤器放置。本研究发现,IVUS和CT得出的右心房到右肾动脉距离、最低肾静脉距离和髂静脉汇合处距离之间存在密切相关性。此外,我们发现从心房-IVC交界处到右肾动脉和最低肾静脉的IVUS距离在统计学上相似。9例患者有10处血管解剖变异,IVUS和CT均识别出这些变异。使用该方案未发生IVC滤器的并发症或位置不当情况。 结论:这些数据表明,将从右心房的IVUS回撤测量值与术前CT得出的从右心房到最低肾静脉和髂静脉汇合处的距离测量值相结合,可为IVUS引导下床边放置IVC滤器提供准确的路线图。我们提供了一种在术前规划文件中整理此信息的方法,以辅助该操作。我们建议更充分地利用这种易于应用的技术,以帮助降低使用单穿刺IVUS引导时滤器位置不当的发生率。
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