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本研究回顾性分析我院收治的4例恶性肿瘤致输尿管狭窄患者的临床资料。所有患者均在实时超声引导下顺利完成经输尿管镜金属支架置入术，手术时间(64±33)min。术后患者肌酐下降(74±127)mmol/L。术后仅2例发生Clavien-DindoⅠ级并发症。所有患者支架管位置良好，术后住院时间(2.5±0.6)d。本手术方法对于恶性肿瘤引起的输尿管梗阻，可以弥补内镜视野的不足。

This study retrospectively analyzed the clinical data of four patients with malignant tumor-induced ureteral strictures admitted to our hospital. All patients successfully underwent ureteroscopic metal stent placement surgery under real-time ultrasound guidance, with a surgical duration of (64±33) minutes. Postoperatively, there was a creatinine decrease of (74±127) mmol/L. Only two cases experienced Clavien-Dindo grade I complications postoperatively. The stents were well positioned in all patients, with a postoperative hospital stay of (2.5±0.6) days. This surgical approach for malignant tumor-induced ureteral obstruction can compensate for the limitations of endoscopic visualization.