Sodium What is Normal? 140 vs 154
A normal sodium on a lab test is 140 mEq (or mmol) / liter, but normal saline (which is purportedly isotonic to plasma) is 154 mEq/liter. What gives? This article will describe how sodium is measured clinically and explain this apparent discrepancy. How Sodium is Measured Historically sodium was measured by flame photometry,
