Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou Institute of Urology, Guangzhou, China.
Division of urology, Department of Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden.
Urol J. 2021 Aug 25;19(1):22-27. doi: 10.22037/uj.v18i.6578.
To evaluate the chemical composition of double-J stent encrustation and to assess risk factors associated with their development.
Patients who had double-J stents removed between July 2016 and June 2017 were recruited for this study prospectively. The clinical features of the patients were recorded and the composition of encrustation material was analyzed by infrared spectroscopy.
Encrustments from a total of 372 double-J stents were collected. The mean age of patients was 50.4±13.1 years and deposits possible to analyze were obtained from 228 males (61.3%) and 144 females (38.7%). Calcium oxalate monohydrate was the most common constituent of stone and encrustments. The encrustation rate of vesical coils was significantly higher than that of renal coils (P<0.001). There was no significant difference in chemical composition between stone and encrustation regarding renal (P=0.086) and vesical coils (P=0.072). The only predictive risk factor for the development of encrustation on double-J stents was indwelling time. This phenomenon was observed in both renal (P<0.001) and vesical coils (P=0.021). Interestingly, patient with chronic kidney disease (CKD) was associated with less risk of encrustation on both renal (P<0.001) and vesical coils (P=0.001).
The chemical composition of double-J stent encrustation was the same as the urinary stone. The prevention strategy for stone composition is also suitable for the prevention of encrustation of double-J stent. The only predictive factor for double-J stent encrustation was the indwelling time. CKD patient was shown to be less at risk for the development of encrustation.
评估双 J 支架包裹物的化学成分，并评估与其发展相关的危险因素。
本研究前瞻性招募了 2016 年 7 月至 2017 年 6 月期间取出双 J 支架的患者。记录患者的临床特征，并通过红外光谱分析包裹物材料的成分。
共收集了 372 根双 J 支架的包裹物。患者的平均年龄为 50.4±13.1 岁，有 228 名男性（61.3%）和 144 名女性（38.7%）的沉积物可进行分析。草酸钙一水合物是结石和包裹物中最常见的成分。膀胱线圈的包裹率明显高于肾线圈（P<0.001）。关于肾线圈（P=0.086）和膀胱线圈（P=0.072），结石和包裹物的化学成分没有显著差异。唯一预测双 J 支架包裹物形成的危险因素是留置时间。这种现象在肾线圈（P<0.001）和膀胱线圈（P=0.021）中均观察到。有趣的是，慢性肾脏病（CKD）患者在肾线圈（P<0.001）和膀胱线圈（P=0.001）上的包裹物形成风险较低。
双 J 支架包裹物的化学成分与尿结石相同。针对结石成分的预防策略也适用于预防双 J 支架包裹物的形成。双 J 支架包裹物形成的唯一预测因素是留置时间。CKD 患者的包裹物形成风险较低。
