Discolored Ureteral Stents: Findings in Urinalysis and Urine Culture
Discolored Ureteral Stents: Findings in Urinalysis and Urine Culture
复制标题
DOI：
10.1371/journal.pone.0122984
复制
发表时间：
2015-04-07
期刊：
影响因子：
3.7
通讯作者：
Matsuzaki, Junichi
中科院分区：
文献类型：
--
作者：
Kawahara, Takashi;Miyamoto, Hiroshi;Matsuzaki, Junichi
在日常临床实践中，有时会遇到变色的输尿管支架;然而，变色输尿管支架发展的潜在机制仍然未知。在本研究中，我们回顾性分析了变色输尿管支架的特点，根据尿分析和尿培养的结果。材料与方法我们确定了26例变色输尿管支架，并比较了21例变色输尿管支架与45例无色输尿管支架的尿分析和尿培养结果。变色输尿管支架的支架植入持续时间分别为78.0和81.3（+/- 21.3）天，无色输尿管支架的支架植入持续时间分别为69.0和74.9（+/- 19.8）天（P = 0.25）。变色输尿管支架管组尿pH值明显高于无色输尿管支架管组（平均值：6.4 vs 6.0，P < 0.05）。两组尿分析中RBC（P = 0.51）和WBC（P = 0.35）计数无显著差异。此外，在支架变色的患者中，培养阳性率[20/21（95.2%）]显著（P < 0.01）高于非彩色输尿管支架管组[33/45结论在本研究中，带有变色输尿管支架的受试者显示出具有阳性尿培养的显著更高的可能性，并且在尿分析中也显示出更高的pH值。然而，没有明确的临界点来预测变色。
ObjectiveDiscolored ureteral stents are sometimes encountered in daily clinical practice; however, the mechanism(s) underlying the development of discolored ureteral stents remain unknown. In this study, we retrospectively analyzed the characteristics of discolored ureteral stents based on the results of a urinalysis and urine culture.Materials & MethodsWe identified a total of 26 patients with discolored ureteral stents and compared the findings in the urinalyses and urine culture in 21 discolored versus 45 non-colored ureteral stents.ResultsThe median and mean (+/- SD) duration of stenting time was 78.0 and 81.3 (+/- 21.3) days for the discolored ureteral stents and 69.0 and 74.9 (+/- 19.8) days for the non-colored ureteral stents, respectively (P = 0.25). The discolored ureteral stents were associated with a higher mean urine pH than the non-colored ureteral stents (mean: 6.4 vs 6.0, P < 0.05). There were no significant differences between the two groups in the RBC (P = 0.51) and WBC (P = 0.35) counts in the urinalyses. In addition, the rate of a positive culture in the patients with discolored stents [20 of 21 (95.2%)] was significantly (P < 0.01) higher than that observed in the patients with non-colored ureteral stents [33 of 45 (73.3%)].ConclusionsIn this study, the subjects with discolored ureteral stents showed a significantly higher likelihood of having a positive urine culture and also demonstrated higher pH values in the urinalyses. However, no clear cut-off point to predict discoloration was indicated.