男,35岁。B型超声发现右输尿管上段结石， 大小1.2 cm xO. 8 cm，合并轻度右肾积水。无发热，静 脉尿路造影（IVU)显示右输尿管上段结石，右肾轻度积 水，输尿管显影。首选的治疗方法是

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