Electrolytes
Electrolyte markers describe fluid balance, acid-base status, renal handling, mineral homeostasis, and dissolved-particle concentration. This topic groups sodium, potassium, chloride, bicarbonate, calcium, phosphorus, and calculated serum osmolality from the standard chemistry profile.
Frequently Asked Questions
Which markers are most central to electrolyte chemistry?
Sodium and chloride reflect extracellular fluid balance, potassium reflects renal and cellular handling, bicarbonate reflects acid-base status, calcium and phosphorus add mineral context, and calculated serum osmolality combines sodium, glucose, and BUN.
Why are electrolyte distributions so narrow?
Each analyte is tightly regulated by hormones, kidney handling, and cellular buffering. Serum concentrations change only slightly even with large variation in diet or behavior, which keeps population percentiles close together.