Final answer:
It's essential for solutions like normal saline and Lactated Ringer’s to be isotonic to maintain cell stability and prevent imbalances, mirroring the body's fluid electrolyte composition.
Step-by-step explanation:
It's crucial that intravenous solutions like normal saline and Lactated Ringer’s solution are isotonic because this property ensures that the fluid balance in and out of the body's cells remains stable. An isotonic solution has the same concentration of electrolytes as the body fluids, which prevents the cells from shrinking (due to dehydration) or swelling (due to overhydration). Lactated Ringer's solution has an electrolyte composition that mirrors the body's own fluid composition, with 130 mEq/L Na+, 4 mEq/L K+, 3 mEq/L Ca²+, 109 mEq/L Cl¯, and 28 mEq/L lactate, which results in balanced overall charges, preventing electrical imbalances and ensuring proper organ function.