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最新一版的THE ICU BOOK中提到的KCL的給法The standard method of intravenous potassium replacement is to add 20 mEq of potassium to 100 ml of isotonic saline and infuse this mixture over 1 hour. The maximum rate of intravenous potassium replacement is usually set at 20 mEq/hour,bur dose rates up to 40 mEq/L occasionally may be necessary (e.g., with serum K+ below 1.5 mEq/L or serious arrhythmias),and dose rate as high as 100 mEq/hour habe been used safely. A large central vein should be used for infusion because of the irritating properties of the hyperosmotic potassium solutions. However, if the desired replacement rate is greater than 20 mEq/hour, the infusion should not be fiven through a central venous catheter because of the theoretical fisk of transient hyperkalemia in the right heart chambers, which can predispose to cardiac standstill. In this situation, the potassium dose can be split and administered via two peripheral veins. |
