PURPOSE The purpose of this study was to determine whether the measured size of active gastrointestinal hemorrhage was useful in predicting subsequent positive findings at catheter angiography. MATERIALS AND METHODS This was a single-institution retrospective study consisting of 32 patients with computed tomography angiography (CTA) positive for gastrointestinal bleeding who went on to receive catheter angiography. Each CTA was reviewed, with axial measurements of the anterior-posterior and transverse dimensions of the largest foci of hemorrhage recorded. Volumetric analysis was used to measure the volume of hemorrhage. These measurements were performed for both the arterial and portal venous phases. Additionally, the interval growth between the arterial and portal venous phase was also calculated. RESULTS There was a statistically significant difference in the absolute size of the maximum transverse dimension on portal venous phase imaging (mean = 19.8 mm, p < 0.001), as well as an interval increase in transverse (mean = 8.5 mm, p < 0.001) and anteriorposterior (mean = 5.4 mm, p = 0.027) size between arterial and portal venous phases in patients with positive catheter angiography versus negative catheter angiography. There was a statistically significant difference in the volume of hemorrhage on arterial (mean = 1.72 cm3, p = 0.020) and portal venous phases (mean = 5.89 cm3, p = 0.016), as well as an interval change in the size of hemorrhage between the two phases (mean = 4.17 cm3, p = 0.020) in patients with positive catheter angiography versus patients in the negative catheter angiography group. CONCLUSIONS The absolute axial size and volume of hemorrhage, as well as the interval change between the arterial and portal venous phases of CTA imaging is predictive of subsequent positive catheter angiography.

中文翻译：

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急性下消化道出血大小的CTA测量可预测随后的阳性导管血管造影。

目的本研究的目的是确定活动性胃肠道出血的测量大小是否可用于预测随后在导管血管造影上发现的阳性结果。材料与方法这是一项单机构回顾性研究，由32位胃肠道出血阳性的CT血管造影（CTA）患者组成，他们随后接受了导管血管造影。审查了每个CTA，并记录了最大出血灶的前后尺寸和轴向尺寸。体积分析用于测量出血量。对动脉期和门静脉期均进行了这些测量。另外，还计算了动脉和门静脉期之间的间隔增长。结果门静脉相成像的最大横向尺寸的绝对大小（均值= 19.8 mm，p <0.001）和横向间隔的增加（均值= 8.5 mm，p <0.001）存在统计学差异。导管造影阳性与导管造影阴性的患者在动脉期和门静脉期之间的前后大小（平均值= 5.4 mm，p = 0.027）。动脉（平均= 1.72 cm3，p = 0.020）和门静脉期（平均= 5.89 cm3，p = 0.016）的出血量以及出血之间的间隔时间间隔有统计学差异导管造影阳性的患者与阴性导管造影的患者分为两个阶段（平均值= 4.17 cm3，p = 0.020）。