What is expected to happen to potassium with a 0.10 change in pH?

A change in pH can have a significant impact on potassium levels in the blood, primarily because of the relationship between hydrogen ions (H+) and potassium ions (K+). As pH decreases (becomes more acidic), there is an increase in hydrogen ions in the extracellular fluid. In response to this increase in H+, potassium shifts out of the cells into the bloodstream, leading to an increase in serum potassium levels.

In a clinical context, every 0.1 change in pH can be expected to cause approximately a 0.6 mEq/L change in potassium levels, moving in the same direction as the change in pH. Therefore, with a decrease in pH, potassium levels rise; conversely, with an increase in pH (more alkaline), potassium levels would decrease.

This mechanism is significant for critical care paramedics to understand, as managing potassium levels is vital in various medical emergencies, particularly in cases of acidosis or alkalosis. Understanding this relationship allows for better assessment of electrolyte balance in patients experiencing metabolic disturbances.