Sunday, July 9, 2017

Q: Fasting produces (choose one) 

 A) Hyperkalemia 
B) Hypokalemia


Answer: A

Fasting can increase potassium movement out of the cells due probably due to reduced insulin secretion. It's clinical implication is in patients who are in renal insufficiency or on medicines which can induce hyperkalemia and left NPO in ICU.


References:


1. Allon M. Hyperkalemia in end-stage renal disease: mechanisms and management. J Am Soc Nephrol 1995; 6:1134.


2. Allon M, Takeshian A, Shanklin N. Effect of insulin-plus-glucose infusion with or without epinephrine on fasting hyperkalemia. Kidney Int 1993; 43:212.

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