血钾浓度仅反映细胞外液钾离子分布,当低于3.5毫当量/升,称为低钾血症;其时,体内不一定缺钾。反之,体内钾总量减少时,血钾浓度可能正常甚或偏高。因此二者意义有所不同,临床统称为低钾症。本症临床常见,约占内科住院患者1.7％,后果亦较严重,故已 Potassium concentration reflects only the extracellular potassium ion distribution, when less than 3.5 meq / liter, known as hypokalemia; the time, the body does not necessarily lack of potassium. Conversely, when the total amount of potassium in the body decreases, serum potassium concentration may be normal or even high. Therefore, the two have different meanings, clinically referred to as hypokalemia. This disease is clinically common, accounting for about 1.7% of hospitalized medical patients, the consequences are more serious, so it has