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Preparation instructions: Fasting for 12 hours prior to blood draw recommended

This is a blood test that checks several substances in the blood, including glucose (blood sugar), electrolytes, and markers of kidney function. It is one of the most commonly ordered tests.

Results included are:

  • BUN
  • BUN:creatinine ratio
  • Calcium, serum
  • Carbon dioxide, total
  • Chloride, serum
  • Creatinine, serum
  • eGFR calculation
  • Glucose, serum
  • Potassium, serum
  • Sodium, serum

Expected turnaround within 1 day, although this can vary depending on other tests ordered for the same blood draw, and expected variation in test handling.