IMAGING SCIENCE AND PHOTOCHEMISTRY ›› 2022, Vol. 40 ›› Issue (4): 725-729.DOI: 10.7517/issn.1674-0475.220315

• Review and Articles • Previous Articles     Next Articles

Application of CT in the Diagnosis of Nephrolithiasis Complicated with Pyonephrosis and Preoperative Localization

LIAO Shubin, YANG Dongshen, SU Xiaolin   

  1. Department of Urology, Fangchenggang First People's Hospital, Fangchenggang 538021, Guangxi, P. R. China
  • Received:2022-03-10 Published:2022-07-09

Abstract: This study investigated the application value of CT in the diagnosis of calculous pyonephrosis and preoperative localization. Selected 165 patients with nephrolithiasis complicated with pyonephrosis who were to undergo surgical treatment through randomized clinical study mode, all patients underwent CT examination before surgery. Using surgical results as the gold standard, among them 78 patients were diagnosed with nephrolithiasis complicated with pyonephrosis, and 87 cases were not with nephrolithiasis, analyzed the value of of CT in the diagnosis of nephrolithiasis complicated with pyonephrosis. According to the way of preoperative positioning of stones, the 78 patients with pyonephrosis were divided into CT group with 39 cases (preoperative CT localization) and ultrasound group with 39 cases (preoperative ultrasonic localization) and then compared the influence of two preoperative positioning methods on the surgical outcome. The results showed that the CT value, peripheral white blood cells (WBC), and C-reactive protein (CRP) of the kidney stone combined with pus kidney group were significantly higher than those of the kidney stone group (P<0.05). The sensitivity of CT value, WBC and CRP in the diagnosis of nephrolithiasis complicated with pyonephrosis were 87.81%, 72.57%, and 77.96%, respectively, and the specificity was 82.60%, 76.04%, and 75.75%, respectively,the AUC values were 0.904, 0.759, and 0.810, respectively. The mean operation time, mean lithotripsy time, and hemoglobin (Hb) decrease in the CT group were lower than those in the ultrasound group (P<0.05), the stone clearance rate in the CT group was higher than that in the ultrasound group (P<0.05). There was no significant difference in hospitalization time between the CT group and the ultrasound group (P>0.05). Preoperative CT examination has higher diagnostic sensitivity in patients with renal calculi and pyonephrosis, and CT can be used for calculus localization, and the localization effect is better than ultrasound localization.

Key words: CT, nephrolithiasis, pus kidney, localization, percutaneous nephrolithotomy