Objective To observe the B- ultrasonic (B-US) renal changes of chronic aristolochic acid nephropathy (CAAN) patients and to determine its value in disease diagnosis.

• 摘要 目的 探讨慢性马兜铃酸肾病(CAAN)患者的肾脏B超特征及其对判断肾脏病变慢性化程度的意义。