Objective. Bedside ultrasonography (US) is a new imaging modality that has begun to be used in the Pediatric Emergency Unit to evaluate inferior vena cava (IVC) diameter for intravascular volume status. In this article, we aimed to evaluate IVC diameter with bedside US before and after the fluid therapy in dehydrated children. Methods. A total of 124 dehydrated patients were enrolled, aged 8 months to 17 years. The maximum diameters of the IVC and aorta (AO) were measured. IVC/AO ratio and IVC collapsibility index IVC–CI were calculated before and after the fluid therapy and correlation with the degree of dehydration and laboratory parameters was investigated. Results. Of the 124 patients, 49.2% (n = 61) were male, the mean age was 7.5 ± 4.94 years. The IVC/AOs ratio was increased in mild and moderate/severe groups after fluid therapy compared to before fluid administration. While the mean rate of heart rate, blood urea nitrogen (BUN), creatinine, and uric acid values were higher in the moderate/severe group, potassium and HCO₃ were lower. There was no significant change in AO diameter and IVC–CI after fluid therapy in all groups. When the factors affecting the IVC/AOs ratio were analyzed with the logistic regression backward model; the IVC/AO ratio was found to increase as the degree of dehydration decreased (Adj.β = −0.318) and as the age (Adj.β = 0.242) and CRP (Adj.β = 0.186) value increased. Conclusion. The IVC/AO ratio can be a promising index for the assessment and grading of dehydration in children, and cutoff values that vary according to age are necessary for a more objective assessment of dehydration.

中文翻译：

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床边超声评估脱水儿童下腔静脉直径

客观。床边超声 (US) 是一种新的成像方式，已开始在儿科急诊室用于评估下腔静脉 (IVC) 直径的血管内容量状态。在本文中，我们旨在通过床边超声评估脱水儿童液体治疗前后的 IVC 直径。方法。共纳入 124 名脱水患者，年龄在 8 个月至 17 岁之间。测量了 IVC 和主动脉 (AO) 的最大直径。计算液体治疗前后的 IVC/AO 比率和 IVC 塌陷指数 IVC-CI，并研究与脱水程度和实验室参数的相关性。结果。在 124 名患者中，49.2% ( n = 61) 为男性，平均年龄为 7.5 ± 4.94 岁。与液体给药前相比，液体治疗后轻度和中度/重度组的 IVC/AOs 比率增加。中/重度组的平均心率、血尿素氮 (BUN)、肌酐和尿酸值较高，而钾和 HCO ₃较低。各组液体治疗后 AO 直径和 IVC-CI 无显着变化。采用logistic回归后向模型分析影响IVC/AOs比的因素时；随着脱水程度的降低 (Adj. β  = -0.318) 和年龄 (Adj. β  = 0.242) 和 CRP (Adj. β  = 0.186) 值的增加，发现 IVC/AO 比率增加。结论. IVC/AO 比值可以作为儿童脱水评估和分级的一个有希望的指标，并且根据年龄变化的临界值对于更客观地评估脱水是必要的。