单侧输尿管结石双肾密度的不对称性

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Abstract Objective: To investigate the difference in CT value density of bilateral kidneys in patients with unilateral ureteral calculi. Methods: A total of 119 patients with unilateral ureteral calculi treated in Taizhou First People’s Hospital from December 2013 to January 2017 were selected as observation group and in the same period, 80 healthy volunteers were recruited as the control group. CT values of renal parenchyma on the lesion and the healthy sides were measured, and the ratio of CT values (CTlesion/CThealthy) was calculated. The ROC curve was drafted to analyze the optimal diagnostic value of the CT ratio. According to the position of calculi, the observation group was divided into upper ureteral calculi group, middle ureteral calculi group and lower ureteral calculi group. According to the clinical classification of the stone size (I type: I type: ≤5 mm;II type: 6~9 mm; III type:≥10 mm), the observation group was further divided into I type group, II type group and III type group. Results: The average values of CTlesion/CThealthy in the unilateral ureteral calculi group (84.43%±6.17%) was significantly lower than the control group (96.02%±2.03%) (P<0.01). The area under the ROC curve of CTlesion/CThealthy was 0.981 and optimal diagnostic threshold was 93.10%. The corresponding sensitivity, specificity, accuracy, positive predictive value and negative predictive value were 98.8%, 94.3%, 97.29%, 97.16% and 97.55% respectively. There was no significant difference among the position groups. There was no significant difference among the stone size groups, either. Conclusion: The decrease in CT ratio of the bilateral kidney is one of the reliable secondary signs of unilateral ureteral calculi, but it is not affected by the position and size of ureteral calculi.

Key words： ureteral calculi receiver operating characteristic curve threshold value tomograpy, X-ray computed

Received: 14 March 2018

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	YU Ling’an
	HUANG Danjiang
	Han Yingmin
	Zhang Lingmin

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https://xb.wmu.edu.cn/EN/ OR https://xb.wmu.edu.cn/EN/Y2018/V48/I10/741

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