Ethanol concentration in serum/plasma (quantitative measurement)

Why Is This Test Done?

Your healthcare provider may order this test if you’ve been exposed to alcohol recently, if you’re suspected of being under the influence, or if you’re experiencing symptoms like confusion, slurred speech, or vomiting that could be linked to alcohol poisoning. It can also be part of routine screening for heavy or chronic alcohol use, especially in medical or legal settings.

How Is the Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The blood is then sent to a lab where it’s analyzed to measure the ethanol concentration. The test is quick and typically done in a clinical setting.

What Are Common Uses?

This test is commonly used in emergency departments to confirm alcohol intoxication, in workplace or legal settings to assess impairment, and in medical evaluations for suspected alcohol-related health issues. It can also help monitor alcohol withdrawal or guide treatment decisions.

What Do Results Mean?

Results are reported in milligrams per deciliter (mg/dL) or milliequivalents per liter (mEq/L). Higher levels may indicate recent alcohol consumption, while very low or zero levels suggest no recent alcohol intake. Interpretation depends on clinical context, such as time since exposure or symptoms.