周期性麻痹是一组与钾离子代谢有关的代谢性疾病。临床表现为反复发作的驰缓性骨骼肌瘫痪或无力 ,持续数小时至数天 ,发作间歇期完全正常。按发作时血清钾的水平可将本病分为三种类型 :低钾型、高钾型和正常血钾型周期性麻痹。国内以散发性、低钾型周期性麻痹最常见。由甲状腺 Periodic paralysis is a group of metabolic diseases associated with potassium metabolism. Clinical manifestations of recurrent Chi-speed skeletal muscle paralysis or weakness, lasted for several hours to several days, intermittent episodes completely normal. According to seizure levels of serum potassium can be divided into three types of the disease: hypokalemia, potassium and normal potassium potassium periodic paralysis. Domestic sporadic, hypokalemic periodic paralysis is the most common. By the thyroid