Ethanol (Alcohol) Concentration in Serum or Plasma

Why This Test Is Done

Doctors may order this test if you’ve been drinking heavily, if you’re experiencing symptoms like confusion, vomiting, or trouble breathing, or if you’re suspected of alcohol poisoning. It can also be used in medical settings like emergency rooms, during surgeries, or to check for alcohol dependence.

How the Test Works

A small blood sample is taken from your arm. The lab uses a sensitive chemical test to detect and measure the alcohol present in your serum or plasma. The result is usually reported in milligrams per deciliter (mg/dL) or milliequivalents per liter (mEq/L).

What the Results Mean

Results can vary depending on when the blood was drawn after drinking. For example, a high level shortly after drinking may indicate acute alcohol intoxication, while lower levels over time could reflect ongoing consumption or withdrawal. Always discuss your results with your healthcare provider.

Common Uses and Considerations

This test is often used in emergency situations, during detoxification, or to evaluate liver function and alcohol-related health risks. It’s important to note that alcohol can affect test results temporarily, so fasting may not be required unless specified by your doctor.