Postoperative Serum Electrolyte and Metabolic Panel (with note)

What This Test Measures

Your blood sample will be analyzed for a broad range of electrolytes and metabolic markers, including sodium, potassium, chloride, bicarbonate, blood urea nitrogen (BUN), creatinine, glucose, calcium, magnesium, and sometimes phosphorus or other ions depending on the specific panel. These measurements help identify dehydration, electrolyte shifts, kidney function, and metabolic disturbances that may arise from surgery.

Why It’s Done After Surgery

Surgery can disrupt your body’s natural balance of fluids and electrolytes. This test helps doctors monitor for complications like low or high sodium/potassium levels, kidney stress, or metabolic acidosis/anemia that could slow recovery or require treatment.

Common Causes of Abnormal Results

Results may be affected by fluid loss (e.g., from vomiting, diarrhea, or diuretics), kidney function changes, or medications (e.g., steroids, diuretics). Severe imbalances could indicate conditions like sepsis, heart failure, or improper fluid replacement during surgery.

When to Expect Results

Results typically arrive within 24–48 hours of your blood draw, depending on lab processing. Your healthcare team will discuss findings with you during follow-up visits.