a machine that uses dialysis to remove impurities and waste products from the bloodstream before returning the blood to the patient's body
双语例句
When a patient needs to use a kidney machine, surgeons stitch a small tube into a suitable place in his body--usually either in his forearm above the wrist or in his leg. 当患者需要使用人工肾时，大夫在患者身体的适当部位，一般是在腕关节的前胳臂和腿上插入一个小管子。
