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首页> 外文期刊>Radiology >Vascular air embolism: location, frequency, and cause on electron-beam CT studies of the chest.
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Vascular air embolism: location, frequency, and cause on electron-beam CT studies of the chest.

机译：血管空气栓塞：胸部电子束CT研究的位置，频率和原因。

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摘要

PURPOSE: To determine the frequency and location of venous air emboli that occur with the use of electron-beam computed tomographic (CT) studies of the chest. MATERIALS AND METHODS: Findings from 677 patients who underwent chest electron-beam CT with intravenous administration of contrast material were reviewed. Unenhanced CT studies were performed in 127 (18.8%) of these patients while the intravenous cannula was in place but before injection of contrast material. RESULTS: Air emboli were observed on CT studies in 79 (11.7%) of 677 patients. Emboli were small (up to three air bubbles less than 1 cm in diameter) in 70 (10.3%) patients and were moderate (more than three air bubbles or bubbles 1-2 cm in diameter) in nine (1.3%) patients. Air emboli were located in the main pulmonary artery (n = 54 [8.0%]), superior vena cava (n = 12 [1.8%]), right ventricle (n = 10 [1.5%]), subclavian or brachiocephalic vein (n = 6 [0.9%]), and right atrium (n = 5 [0.7%]). Seven patients (1.0%) had emboli in more than one location. Air emboli were depicted on unenhanced CT scans of seven (5.5%) of 127 patients. No association was found between the frequency of air embolism and injection flow, injection site, or amount or type of contrast agent. CONCLUSION: Intravenous administration of contrast material may cause small to moderate-sized air emboli. Knowledge of the common locations of emboli can help radiologists distinguish them from image artifacts or paravasal air collections.
机译：目的：通过使用胸部的电子束计算机断层扫描（CT）研究来确定发生静脉空气栓塞的频率和位置。材料与方法：回顾性分析了677例接受了胸腔电子束CT静脉注射造影剂的患者的发现。这些患者中有127例（18.8％）在静脉插管就位但未注射造影剂之前进行了未增强的CT研究。结果：677例患者中有79例（11.7％）在CT研究中观察到了空气栓塞。在70名（10.3％）患者中，栓子较小（最多3个气泡，直径小于1 cm），在9名患者（1.3％）中，栓子中度较小（超过3个气泡或直径1-2 cm的气泡）。空气栓子位于肺主动脉（n = 54 [8.0％]），上腔静脉（n = 12 [1.8％]），右心室（n = 10 [1.5％]），锁骨下或肱头静脉（n = 6 [0.9％]）和右心房（n = 5 [0.7％]）。七名患者（1.0％）在一个以上的位置有栓子。在未经增强的127例患者中有7例（5.5％）的CT扫描中显示了空气栓塞。空气栓塞的频率与注射流量，注射部位或造影剂的量或类型之间未发现关联。结论：静脉内注射造影剂可能会导致小到中等大小的空气栓塞。了解栓子的常见位置可以帮助放射线医师将其与影像伪影或血管旁气道采集区分开。

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