Conclusions: acute postrenal renal failure, PCN retrieve renal function and avoid hemodialysis, is safe and effective, B ultrasound can increase the achievement ratio.

• 结论：经皮肾穿刺造瘘对急性肾后性肾衰患者挽救肾脏功能有重要价值，B超定位可以显著增加成功率。