text: 4.低血容量休克因血浆白蛋白低下、血浆胶体渗透降低，本征常有血容量不足，加上部分患儿长期不恰当忌盐，当有较急剧的体液丢失（如吐、泻、大剂量利尿应用及大量放腹水等）时即可出现程度不等的血容量不足乃至休克的症状，如烦躁不安、四肢湿冷、皮肤花斑纹、脉搏细速、心音低钝及血压下降测不出等表现。
entities.entity: 低血容量休克
entities.label: sym
entities.entity: 血浆白蛋白
entities.label: bod
entities.entity: 血浆白蛋白低下
entities.label: sym
entities.entity: 血浆胶体渗透降低
entities.label: sym
entities.entity: 血容量
entities.label: ite
entities.entity: 急剧的体液丢失
entities.label: sym
entities.entity: 吐
entities.label: sym
entities.entity: 泻
entities.label: sym
entities.entity: 利尿
entities.label: pro
entities.entity: 放腹水
entities.label: pro
entities.entity: 血容量
entities.label: ite
entities.entity: 休克
entities.label: sym
entities.entity: 烦躁不安
entities.label: sym
entities.entity: 四肢湿冷
entities.label: sym
entities.entity: 皮肤
entities.label: bod
entities.entity: 皮肤花斑纹
entities.label: sym
entities.entity: 脉搏细速
entities.label: sym
entities.entity: 心音低钝
entities.label: sym
entities.entity: 血压下降测不出
entities.label: sym