Abstract
[Purpose] The purpose of this study was to examine the cut-off value in blood removal failure of each indicator based on ultrasonography of the arteriovenous fistula. [Subjects and methods] It was targeted at 374 patients (1,096 inspections) with arteriovenous fistula who underwent ultrasonography from January 2008 to December 2010. Subjects were classified into excellent blood removal and blood removal failure groups. The Receiver Operating Characteristic curve of the blood flow volume, resistance index, and stenosis diameter was produced, and the cutoff value was calculated using the Youden index. Moreover, the area under the curve was produced and compared regarding the ability to make a diagnosis with each indicator. [Results] In the Receiver Operating Characteristic analysis of the blood flow volume, resistance index, and stenosis diameter, cutoff values were 350mL/min, 0.70, and 1.3mm, respectively. Moreover, the area under the curve in the blood flow volume, resistance index, and stenosis diameter were 0.982, 0.904, and 0.924, respectively.［Conclusions］It was suggested that the blood flow volume, resistance index, and stenosis diameter which are obtained by ultrasonography were indicators which can be used to predict blood removal failure. It was suggested that the blood flow volume had a particularly high diagnostic capability compared with the other indicators, and was an excellent indicator.
