术后肾阻力指数对老年髋关节置换 术后急性肾损伤的诊断价值

目的 探讨术后肾阻力指数（RI）对老年髋关节置换术后急性肾损伤（AKI）的诊断价值。方法 选取2015 年12 月-2016 年12 月该院收住的91 例老年髋关节置换术后患者。应用超声测定肾脏叶间动脉 RI，根据7 d 内是否发生AKI 分为非AKI 组和AKI 组；比较两组RI 大小，同时绘制术后RI 和血肌酐（Scr） 受试者工作特征（ROC）曲线，比较两者曲线下面积。结果 纳入研究的91 例患者，非AKI 组47 例，AKI 组 44 例。AKI 组术后肾RI 值（0.74±0.03）高于非AKI 组（0.62±0.04），差异有统计学意义（P <0.05）；术后肾RI 和 Scr 对AKI 诊断ROC 曲线下面积分别为0.955（95%CI ：0.912，0.980）、0.778（95%CI ：0.681，0.876）。结论 老年髋关节置换术后较高的肾RI 与AKI 发生有关，可作为AKI 的诊断指标。

Diagnostic value of postoperative renal resistive index for acute renal injury after hip arthroplasty in elderly patients

Objective To investigate the diagnostic value of postoperative renal resistive index for acute renal injury after hip arthroplasty in elderly patients. Methods From December 2015 to December 2016, 91 elderly patients after hip arthroplasty were enrolled in the Surgical Intensive Care Unit (SICU), and the renal arterial resistive index was measured by ultrasonography. All patients were divided into no AKI group and AKI group within 7 days. The value of RI was compared between the two groups. At the same time, the receiver operating characteristic (ROC) curve of RI and serum creatinine (Scr) were drawn, and the area under the curve was compared. Results Among the 91 patients included in the study, 47 were in no AKI group and 44 in AKI group. The postoperative renal RI in AKI group (0.74 ± 0.03) was higher than that in no AKI group (0.62 ± 0.04), and the difference was statistically significant (P < 0.05). The area under the ROC curve of AKI was 0.9547 (95% CI: 0.912, 0.980) and 0.7783 (95% CI: 0.681, 0.876), respectively. Conclusion The higher value of renal RI in elderly patients after hip arthroplasty was related to AKI, so renal RI can be used as a diagnostic indicator of AKI.