Serum Lactate Concentration

Why Is This Test Done?

Doctors may order a serum lactate test to check for conditions affecting blood flow, oxygen use, or metabolism, such as shock, heart attack, or severe infections. It can also be used during surgery or critical care to monitor how well your body is responding to treatment.

When Might You Need This Test?

You might need this test if you’re experiencing symptoms like rapid breathing, confusion, or low blood pressure, or if you’re recovering from surgery, a heart attack, or a severe illness. It’s also sometimes done during emergency situations like trauma or severe infections.

What Does the Test Involve?

A blood sample is drawn from a vein, usually in your arm. The blood is sent to a lab where it’s analyzed to measure lactate levels. No special preparation is needed, but you should avoid eating or drinking for a short time before the test if instructed.

What Are Common Causes of High or Low Lactate?

High lactate levels can occur due to conditions like shock, heart or lung problems, severe infections, or low blood sugar. Low levels are less common but may happen in rare metabolic disorders or during certain medical treatments.