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Results In 48 cases, 30 with nonradiolucent calculus, 16 with radiolucent calculus and 2 with blood coagulum were detected as the causes of acute or subacute complete urethral obstruction.
结果30例为阳性结石，16例为阴性结石，2例为血凝块引起的输尿管的急性或亚急性完全梗阻；
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