What is the first step when interpreting laboratory values for electrolyte disturbances?

• A. Review values
• B. Check only the most abnormal value
• C. Rely on symptoms
• D. Consult pharmacy

Answer: (A)

The first step in interpreting electrolyte lab values is to review the values. Looking at the entire panel together lets you see the overall pattern, identify which electrolytes are abnormal and in what direction, and note any trends or inconsistencies. This holistic view also helps catch data issues or artifacts, such as a hemolyzed sample that can falsely elevate potassium or a unit mislabel, by comparing values within the panel and with prior results. Establishing the full picture and ensuring data quality provides a solid foundation for further assessment, including correlation with symptoms, medications, renal function, and acid-base status. Focusing only on the single most abnormal value can mislead you, and relying on symptoms alone or a pharmacy consultation doesn’t establish the initial interpretation of the lab data.