text: 两者均表现为高血钾和酸中毒，但本病在酸血症时，尿pH＜5.5，而且如果肾小球滤过率无明显下降（＞40ml/min），在碱化尿液后，尿与血CO<sub>2</sub>分压之差＞2.66kPa（20mmHg）当尿丢失增多而血浓度正常时，易与pRTA混淆，鉴别要点在于本病在酸血症时，排出减少，可用硫酸钠滴注试验鉴别。
entities.entity: 高血钾
entities.label: dis
entities.entity: 酸中毒
entities.label: dis
entities.entity: 酸血症
entities.label: dis
entities.entity: 尿
entities.label: bod
entities.entity: 尿pH＜5.5
entities.label: sym
entities.entity: 肾小球
entities.label: bod
entities.entity: 肾小球滤过率无明显下降
entities.label: sym
entities.entity: 尿液
entities.label: bod
entities.entity: 尿与血CO<sub>2</sub>分压
entities.label: ite
entities.entity: 尿与血CO<sub>2</sub>分压之差＞2.66kPa（20mmHg）
entities.label: sym
entities.entity: 尿丢失增多而血浓度正常
entities.label: sym
entities.entity: pRTA
entities.label: dis
entities.entity: 酸血症
entities.label: dis
entities.entity: 硫酸钠滴注试验
entities.label: pro