When potassium, calcium, or magnesium runs low, we replace it — but each one carries a hard safety rule that keeps a fix from becoming an emergency. Tap an electrolyte to see how it's replaced and what the nurse watches.
Pick an electrolyte
lowserum levelhigh
The green band is the normal range; the red line marks a low (deficient) patient — the reason we replace.
Three electrolytes to replacetap one to begin
Why safety rules matterEach of these ions steadies the heart, nerves, and muscle. Replacing too fast — or ignoring a warning sign — can be as dangerous as the deficiency itself.