1病例报告患者女,19岁。因四肢乏力3天就诊。3天前无明显诱因下出现四肢乏力,休息后无好转。既往有类似病史,自诉口服氯化钾后症状可缓解。体格检查:双侧上肢肌力5-级,下肢肌力4级,肌张力正常,余未见异常。实验室检查:尿pH 7.0,比重1.005,尿白细胞25Leu/μl,尿潜血25Ery/UL,尿蛋白(+)。血钾2.17 mmol/L,氯116 mmol/L,钙1.94 mmol/L,磷 A case report patient female, 19 years old. Due to weakness 3 days treatment. 3 days ago no obvious incentive to appear limb weakness, no improvement after rest. Previously similar history, self-prosecution after oral potassium chloride symptoms can be alleviated. Physical examination: 5-grade upper limb muscle strength, lower limb muscle strength 4, normal muscle tone, I no abnormalities. Laboratory tests: urine pH 7.0, specific gravity 1.005, urine leukocytes 25Leu / μl, urine occult blood 25Ery / UL, urinary protein (+). Serum potassium 2.17 mmol / L, chlorine 116 mmol / L, calcium 1.94 mmol / L, phosphorus