患者，男，39岁。65kg,因手术引起小肠瘘。患者主诉头晕、乏力、视力模糊。心率120次/分，血压100/70mmHg,尿散380m/24h,血清钠129mmol/L,血钾3.5mmoVL，估计此患者缺钠

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