移动性浊音（shifting dullness）为临床上检查腹腔有无积液的常用方法。原理是腹腔内积聚液体较多时(约1000ml以上)，在患者取仰卧位叩诊时，液体因重力作用积聚于腹腔低处，含气的肠管漂浮其上，故叩诊腹中部呈鼓音，腹部两侧呈浊音；当患者取侧卧位时，液体积聚于下部，肠管上浮，下侧腹部转为浊音，上侧腹部则为鼓音。移动性浊音阳性说明有腹腔积液。
移动性浊音和流体波更难引出而且需要更大量的腹水。
Shifting dullness and a fluid wave are more difficult to elicit and require more ascites.
腹部移动性浊音及腹穿红色液体在水肿型与坏死型之间、坏死型中死亡组与存活组之间均有显著差异。
There was significant difference in shifting dullness with red paracentetic fluid between mild and severe groups, as well as between the survival and the dead in severe group.
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