OBJECTIVES to compare between mini PNL and the standard PNL in management of renal stones (20-40 mm) regarding operative time, fluoroscopy time, blood loss, stone free rate, and postoperative complications. SUBJECTS AND METHODS This prospective randomized comparative study was carried out on 93 patients divided into 2 groups: Group A included 44 patients who underwent standard PNL, whereas Group B included 49 patients who underwent mini PNL. RESULTS Standard PNL showed shorter operative time yet longer hospitalization, nephrostomy and catheterization time. The mean drop in hemoglobin level was significantly lower in the mini PNL group. In the first week postoperatively, stone-free rate was higher in the standard PNL group, but this was statistically insignificant. However, 4 weeks postoperatively, stone free rate was significantly higher in group A. The postoperative pain and the need for postoperative analgesia were significantly higher in standard PNL patients. CONCLUSIONS Standard PNL achieved higher stone free rate and shorter operative time while mini PNL had the advantage of shorter hospitalization time and lower incidence of pain and postoperative complications.

中文翻译：

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小型经皮肾镜取石术与标准经皮肾镜取石术治疗大肾结石的比较，一项随机对照临床试验。

目的比较迷你 PNL 和标准 PNL 在治疗肾结石（20-40 mm）方面的手术时间、透视时间、失血量、结石清除率和术后并发症。对象和方法 这项前瞻性随机比较研究对 93 名患者进行，分为 2 组：A 组包括 44 名接受标准 PNL 的患者，而 B 组包括 49 名接受迷你 PNL 的患者。结果 标准PNL显示手术时间较短，但住院、肾造口和导尿时间较长。迷你 PNL 组的血红蛋白水平平均下降明显较低。术后第一周，标准PNL组的无结石率较高，但无统计学意义。然而，术后4周，A组的结石清除率明显更高。标准PNL患者的术后疼痛和术后镇痛需求明显更高。结论 标准PNL具有较高的结石清除率和较短的手术时间，而迷你PNL具有较短的住院时间、较低的疼痛和术后并发症发生率的优点。