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血钾浓度低于3.5mml/L叫低钾血症,低钾血症是特殊离子紊乱中最常见的一种,如不及时诊治,往往会危及患者的生命。在没有讨论如何诊治该症之前,先简略复习一下钾代谢的常识:人体钾的含量平均每公斤体重为50mml,一个60公斤体重的成年人,总体钾为3,000mmol。钾是细胞内的主要阳离子。总体钾的98％在细胞内,只有约2％在细胞外。细胞内钾浓度为150—160mmol/L,细胞外为3.5—5.5mmol/L。在正常情况下,钾的摄入每天约80mmol,相当于3.1克钾或相当于氯化钾6克。大部分由尿排出(每天约70mmol)。少部分由大便排出(每天约10mmol)。出汗丢失的钾一般很少,只有大汗淋漓时才排出较多的
Blood potassium concentration of less than 3.5mml / L is called hypokalemia, hypokalemia is the most common type of ion disorder, if not diagnosed and treated, often endangering the patient’s life. Before discussing how to treat the disease, let’s briefly review the common understanding of potassium metabolism: the average body potassium content is 50mm1 / kg body weight and a 60kg body weight adult, with an overall potassium level of 3,000mmol. Potassium is the major intracellular cation. Overall potassium is 98% intracellular and only about 2% extracellular. Intracellular potassium concentration of 150-160mmol / L, extracellular 3.5-5.5mmol / L. Under normal conditions, potassium intake of about 80mmol per day, equivalent to 3.1 grams of potassium or equivalent to 6 grams of potassium chloride. Mostly excreted by urine (about 70 mmol daily). A small part of the discharge from the stool (about 10mmol per day). Potassium sweat loss is generally very small, only sweating only discharge more