RESUMO
Objective To study the diagnostic techniques of acute anuria caused by upper urinary tract obstruction. Methods Fifty-eight patients with acute anuria caused by upper urinary tract obstruction were analyzed on clinical manifestations,etiology of obstruction and imageologic findings. Results The main clinical manifestations consisted of anuria in 58 cases,pain in renal region in 41,percussion tenderness over kidney region in 33,hypertension in 20,high levels of BUN and creatinine in 57 and hyperkaliemia in 8.The main adjuvant examinations included MRU,B-ultrasound,X-ray (KUB,IVU and retrograde pyelography),CT and MRI.The detection rates of upper urinary tract obstruction by above-mentioned examinations were as follows:100% (25/25) with MRU,88% (50/57) with B-ultrasound,60% (6/10) with CT/MRI,49% (19/39) with X-ray. The detection rates of MRU and B-ultrasound were significantly higher than those of X-ray and CT/MRI (P