Glucose in Serum or Plasma (24-Hour Fluid Collection)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like frequent hunger, fatigue, or unexplained weight changes, or if you have conditions like diabetes, hypoglycemia, or metabolic disorders. It may also be used to monitor treatment effectiveness or diagnose glucose-related issues in certain populations.

How the Test Works

A sample of your blood (serum or plasma) is collected over 24 hours, often via a catheter or multiple draws. The glucose levels are measured at intervals to create a profile of your blood sugar activity. The test may also involve a fluid collection (e.g., urine or other bodily fluids) depending on clinical context.

What to Expect Before the Test

No special preparation is typically required unless instructed by your provider. You may need to follow a specific diet or activity restrictions, such as avoiding certain foods or medications, to ensure accurate results. Always follow your provider’s guidance.

What to Expect During the Test

Blood samples are drawn at scheduled intervals, often over a full day. You may experience mild discomfort at the insertion site, but most people tolerate the process well. If fluid collection is involved, follow your provider’s instructions for proper sample handling.