Lactate concentration in cerebrospinal fluid

Why Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms like severe headaches, confusion, seizures, or neurological issues that could suggest conditions like metabolic disorders, infections, or bleeding in the brain. It may also be used to monitor patients with known brain disorders or after certain surgeries.

What Does a High or Low Level Mean?

Elevated lactate levels in CSF can indicate conditions such as brain hypoxia (lack of oxygen), infections, or certain metabolic disorders. Lower-than-expected levels might suggest rare conditions or errors in test interpretation, so results should always be reviewed by a healthcare professional.

How Is This Test Performed?

A small sample of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then analyzed in a lab to measure lactate concentration using specialized techniques.

What Should You Expect Before the Test?

You may be asked to fast for a short period before the test, but this is not always required. Avoid caffeine or alcohol 24 hours before the procedure. Inform your doctor about any medications you’re taking, as some may affect results.