RESUMO
A certain amount of potassium chloride is required to correct the hypokalemia occuring commonly during perioperation,but the overdosage may be harmful. To investigate the proper dose of KCl,40 adult rabbits were randomly and evenly assigned to be intravenously infused with normal saline(group Ⅰ),or saline containing 4,25 or 50 mmol/L KCI (group Ⅱ,Ⅲ,Ⅳ),at rate of 10 ml?kg~(-1)?h~(-1) during operation respectively. As compared with those before operation,the serum level of potassium decreased significantly in group Ⅰ and Ⅱ, changed unsignificantly in group Ⅲ,and increased in group Ⅳ during and after operation;the potassium amounts in liver and skeletal muscles increased markedly after operation. S-T segment was depressed in group Ⅰ and Ⅱ,T wave became peaked in group Ⅳ, and ECG remained normal in group Ⅲ. it is indicated that intravenous KCl infusion at concentration 25 mmol/L and rate of 10ml?kg~(-1)?h~(-1) may properly correct the hypokalemia during perioperation,and the occurance of perioperatine hypokelemia may be related to the uptake of liver and skeletal muscles